JVC VF-HP790 LCD Studio Viewfinder

For Customer Use:
Enter below the Serial No. which is located on the
body.
Retain this information for future reference.
Model No.
Serial No.
Thank you for purchasing this JVC product.
Before beginning to operate this unit, please read
the instructions carefully to ensure the best
possible performance.
STUDIO VIEWFINDER
VF-HP790G INSTRUCTIONS
(A)
LST1110-001C
VF-HP790G
VF-HP790G_EN.book Page 1 Tuesday, March 26, 2013 4:06 PM

II
Introduction
1. Read all of these instructions.
2. Save these instructions for later use.
PORTABLE CART WARNING
(symbol provided by RETAC)
S3125A
IMPORTANT SAFEGUARDS
4. Unplug this appliance system from the wall outlet before cleaning. Do not use liquid cleaners or aerosol
cleaners. Use a damp cloth for cleaning.
5. Do not use attachments not recommended by the appliance manufacturer as they may cause hazards.
6. Do not use this appliance near water - for example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet
basement, or near a swimming pool, etc.
7. Do not place this appliance on an unstable cart, stand, or table. The appliance may fall,
causing serious injury to a child or adult, and serious damage to the appliance.
Use only with a cart or stand recommended by the manufacturer, or sold with the appliance.
Wall or shelf mounting should follow the manufacturer's instructions, and should use a
mounting kit approved by the manufacturer. An appliance and cart combination should be
moved with care.
Quick stops, excessive force, and uneven surfaces may cause the appliance and cart
combination to overturn.
8. Slots and openings in the cabinet and the back or bottom are provided for ventilation, and to insure reliable operation of
the appliance and to protect it from overheating, these openings must not be blocked or covered. The openings should
never be blocked by placing the appliance on a bed, sofa, rug, or other similar surface.
This appliance should never be placed near or over a radiator or heat register.
This appliance should not be placed in a built-in installation such as a bookcase unless proper ventilation is provided.
9. This appliance should be operated only from the type of power source indicated on the marking label. If you are not sure
of the type of power supplied to your home, consult your dealer or local power company. For appliance designed to
operate from battery power, refer to the operating instructions.
10. For added protection for this product during a lightning storm, or when it is left unattended and unused for long periods
of time, unplug it form the wall outlet and disconnect the antenna or cable system. This will prevent damage to the
product due to lightning and power-line surges.
These are general IMPORTANT SAFEGUARDS and certain items may not apply to all appliances.
3. All warnings on the product and in the operating instructions should be adhered to.
FOR USA
14. Never push objects of any kind into this appliance through cabinet slots as they may touch dangerous voltage points or
short out parts that could result in a fire or electric shock. Never spill liquid of any kind on the appliance.
15. Do not attempt to service this appliance yourself as opening or removing covers may expose you to dangerous voltage
or other hazards. Refer all servicing to qualified service personnel.
16. Unplug this appliance from the wall outlet and refer servicing to qualified service personnel under the following conditions:
a. When the power cord or plug is damaged or frayed.
b. If liquid has been spilled into the appliance.
c. If the appliance has been exposed to rain or water.
d.
e. If the appliance has been dropped or the cabinet has been damaged.
f.
If the appliance does not operate normally by following the operating instructions. Adjust only those controls that
are covered by the operating instructions as improper adjustment of other controls may result in damage and will
often require extensive work by a qualified technician to restore the appliance to normal operation.
When the appliance exhibits a distinct change in performance - this indicates a need for service.
17. When replacement parts are required, be sure the service technician has used replacement parts specified by the
manufacturer that have the same characteristics as the original part. Unauthorized substitutions may result in fire,
electric shock, or other hazards.
18. Upon completion of any service or repairs to this appliance, ask the service technician to perform routine safety checks
to determine that the appliance is in safe operating condition.
13. Do not overload wall outlets and extension cords as this can result in fire or electric shock.
12. Follow all warnings and instructions marked on the appliance.
11. Do not allow anything to rest on the power cord. Do not locate this appliance where the cord will be abused by persons
walking on it.
VF-HP790G_EN.book Page II Tuesday, March 26, 2013 4:06 PM

III
Safety Precautions
CAUTION:
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
FOR USA AND CANADA
TO REDUCE THE RISK OF ELECTRIC
SHOCK. DO NOT REMOVE COVER (OR
BACK).
NO USER-SERVICEABLE PARTSINSIDE .
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
INFORMATION:
This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a
commercial environment.
This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications.
Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct
the interference at his own expense.
CAUTION:
CHANGES OR MODIFICATIONS NOT APPROVED BY JVC
COULD VOID USER’S AUTHORITY TO OPERATE THE
EQUIPMENT.
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC
RULES.
OPERATION IS SUBJECT TO THE FOLLOWING TWO
CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE
HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST
ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING
INTERFERENCE THAT MAY CAUSE UNDESIRED
OPERATION.
The lightning flash with arrowhead symbol,
within an equilateral triangle is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to
persons.
POUR CANADA
ATTENTION
RISQUE D’ELECTROCUTION NE
PAS OUVRIR
ATTENTION: POUR EVITER TOUT RISQUE D’ELECTROCUTION
NE PAS OUVRIR LE BOITER.
AUCUNE PIECE INTERIEURE N’EST A REGLER
PAR L’UTILISATEUR.
SE REFERER A UN AGENT QUALIFIE EN CAS DE
PROBLEME.
Le symbole de l’éclair àl’intérieur d’un triangle
équilatéral est destiné à alerter l’utilisateur sur la
présence d’une “tension dangereuse” non isolée
dans le boîtier du produit. Cette tension est
suffisante pour provoquer l’électrocution de
personnes.
Le point d’exclamation àl’intérieur d’un triangle
équilatéral est destiné à alerter l’utilisateur sur la
présence d’opérations d’entretien importantes au
sujet desquelles des renseignements se trouvent
dans le manuel d’instructions.
Ces symboles ne sont utilisésqu’aux Etats-Unis.
INFORMATION (FOR CANADA)
RENSEIGNEMENT (POUR CANADA)
This Class A digital apparatus complies with Canadian
ICES-003.
Cet appareil numérique de la Class A est conforme à la
norme NMB-003 du Canada.
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN
OR MOISTURE.
CAUTION:
This unit should be used with 12V DC only.
To prevent electric shocks and fire hazards, do NOT use any
other power source.
AVERTISSEMENT:
ATTENTION:
Ce magnétoscope ne doit être utilisé que sur du courant direct en 12V.
Afin d’eviter tout resque d’incendie ou d’electrocution, ne pas utillser d’autres
sources d’alimentation électrique.
POUR EVITER LES RISQUES D’INCENDIE OU
D’ELECTROCUTION, NE PAS EXPOSER L’APPAREIL A
L’HUMIDITE OU A LA PLUIE.
NOTE:
The rating plate (serial number plate) is on the unit.
REMARQUE:
La plaque signalétique (plaque du numéro desérie) est située sur
le cadre inférieur de l’unité.
CAUTION:
To prevent electric shock, do not open the cabinet. No user
serviceable parts inside. Refer servicing to qualified service
personnel.
Due to design modifications, data given in this instruction book
are subject to possible change without prior notice.
The apparatus shall not be exposed to dripping or splashing and
that no objects filled with liquids, such as vases, shall be placed
close to the apparatus.
VF-HP790G_EN.book Page III Tuesday, March 26, 2013 4:06 PM

IV
Introduction
FOR EUROPE
This equipment is in conformity with the provisions and
protection requirements of the corresponding European
Directives. This equipment is designed for professional video
appliances and can be used in the following environments:
● Controlled EMC environment (for example, purpose-built
broad-casting or recording studio), and rural outdoors
environments.
In order to keep the best performance and furthermore for
electromagnetic compatibility we recommend to use cables
not exceeding the following lengths:
Safety Precautions
(continued)
Port Cable Length
VF CABLE Shield Cable 0.58 m
DC CABLE Shield Cable 5 m
SDI INPUT Coaxial Cable 2 m
Caution:
Where there are strong electromagnetic waves or magnetism, for
example near a radio or TV transmitter, transformer, motor, etc.,
the picture and the sound may be disturbed. In such case, please
keep the apparatus away from the sources of the disturbance.
Dear Customer,
This apparatus is in conformance with the valid European directives and
standards regarding electromagnetic compatibility and electrical safety.
European representative of JVC KENWOOD Corporation is:
JVC Technical Services Europe GmbH
Postfach 10 05 04
61145 Friedberg
Germany
Sehr geehrter Kunde, sehr geehrte Kundin,
dieses Gerät stimmt mit den gültigen europäischen Richtlinien und
Normen bezüglich elektromagnetischer Verträglichkeit und
elektrischer Sicherheit überein.
Die europäische Vertretung für die JVC KENWOOD Corporation ist:
JVC Technical Services Europe GmbH
Postfach 10 05 04
61145 Friedberg
Deutschland
Information for Users on Disposal of Old Equipment
[European Union]
This symbol indicates that the electrical and electronic
equipment should not be disposed as general household
waste at its end-of-life. Instead, the product should be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment for proper treatment,
recovery and recycling in accordance with your national
legislation.
By disposing of this product correctly, you will help to conserve
natural resources and will help prevent potential negative
effects on the environment and human health which could
otherwise be caused by inappropriate waste handling of this
product. For more information about collection point and
recycling of this product, please contact your local municipal
office, your household waste disposal service or the shop
where you purchased the product. Penalties may be applicable
for incorrect disposal of this waste, in accordance with national
legislation.
(Business users)
If you wish to dispose of this product, please visit our web
page http://www.jvc.eu to obtain information about the take-
back of the product.
[Other Countries outside the European Union]
If you wish to dispose of this product, please do so in
accordance with applicable national legislation or other rules
in your country for the treatment of old electrical and
electronic equipment.
Attention:
This symbol is only valid in the European
Union.
VF-HP790G_EN.book Page IV Tuesday, March 26, 2013 4:06 PM

1
Introduction
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Precautions During Use . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Names of Parts and Functions (Front) . . . . . . . . . . . . . . . .3
Names of Parts and Functions (Rear) . . . . . . . . . . . . . . . . .4
Setup
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Mounting on KA-790G . . . . . . . . . . . . . . . . . . . . . . . . . .5
Removing the Viewfinder . . . . . . . . . . . . . . . . . . . . . . . .5
Connecting VF Cable . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Mounting the Hood Cover (Provided) . . . . . . . . . . . . . . .6
Adjusting the Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Displaying the Images . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Adjusting the Picture Quality . . . . . . . . . . . . . . . . . . . . . . . .6
Menu
Setting the Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Setting the Menu of this Viewfinder . . . . . . . . . . . . . . . .7
Entering the Camera Name . . . . . . . . . . . . . . . . . . . . . .7
Returning Menu Settings to Default Settings . . . . . . . . .7
Setting the Camera Menu of the GY-HM790 Series . . . .7
Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
MAIN MENU Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
MARKER SETTING Menu Screen . . . . . . . . . . . . . . . . .9
SHOOTING ASSIST Menu Screen . . . . . . . . . . . . . . . .10
VIDEO FORMAT Menu Screen . . . . . . . . . . . . . . . . . . .11
OTHERS Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . .12
Precautions when Using with the GY-HM790 Series . . . . .12
Others
Terminal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
This product is an 8.4-inch color viewfinder for use in the
GY-HM790CHU/GY-HM790U/GY-HM790CHE/GY-HM790E/
KA-790G studio system.
High Resolution
A large viewfinder with an 8.4-inch XGA (1024 x 768) LCD
panel.
Multi Scan
Supports YPbPr input of HD (1080i 50/60, 720p 50/60) and
SD (480i 60, 576i 50).
[SDI INPUT] Terminal
In addition to the camera’s viewfinder image, SDI image can
be input to this viewfinder.
Rich Marker
Equipped with Safety Zone display, two types of Zebra display
and Focus Assist function, all of which are highly useful in the
studio.
Screen Menu Function
You can display the menu on the screen to set or adjust the
most appropriate monitor settings for the connecting system.
You can make settings to the menus of this viewfinder and the
GY-HM790 series camera (except for some parts).
Table of Contents Features
How to use this manual
Ⅵ Symbols used
Note : Describes precautions concerning the operation
of this product.
Memo : Describes reference information, such as
functions and usage restrictions of this product.
A : Indicates the reference page numbers and
reference items.
Ⅵ Content of this manual
● All rights reserved by JVC KENWOOD Corporation.
Unauthorized duplication or reprinting of this manual, in
whole or in part, is strictly prohibited.
● All other product names used in this manual are the
trademarks or registered trademarks of the respective
companies. Marks such as ™, ா, and ஽ have been
omitted in this manual.
● Illustrated designs, specifications and other contents of
this manual are subject to change for improvement
without prior notice.

2
Introduction
Location of Storage and Use
ⅷ Do not place this product at the following locations.
Doing so may cause the product to malfunction or break
down.
● Hot or cold places beyond the allowable operating
temperature range of 0 °C to +40 °C.
● Humid places beyond the allowable humidity range of
30 % RH to 80 % RH (non-condensing).
● Places in the vicinity of a strong magnetic field, such as
near transformers or motors.
● Near equipment that emit radio waves, such as
transceivers or mobile phones.
● Places that are subject to dust or sand.
● Places that are subject to strong vibrations.
● Places that are susceptible to condensation, such as
near windows.
● Places that are subject to vapor or oil, such as kitchens.
● Places that emit radioactive rays or X-rays, and
corrosive gases.
ⅷ Noise may occur in the images or the colors may change
when this product and its connecting wire are used in
places subjected to strong radio or magnetic waves (e.g.,
near radios, TVs, transformers, or monitors).
Handling the Product
ⅷ Insufficient ventilation may result in malfunction of this
product. Make sure that objects placed around this product
do not obstruct its ventilation.
ⅷ Do not place containers filled with water (vases, plants,
cups, cosmetics, drugs and so on) on top of this product.
Water getting into the interior of the equipment may result
in fire and electric shock.
Moving the Product
Remove connecting cables before moving this product.
When moving this product, do so after turning off the power of
the connecting camera, and make sure to unplug the cable
from this product. Failure to do so may damage the cable,
causing fire or electric shock.
Maintenance
ⅷ Turn off the power of the connecting camera before
performing maintenance of this product.
ⅷ Use a soft cloth to wipe the product. Do not wipe using
thinner or benzene, as doing so may cause the surface to
melt or turn cloudy. When there is significant soiling, wipe
using a cloth by dipping it in a neutral detergent that is
diluted with water, followed by cleaning using a dry cloth.
ⅷ The exterior of this product may change or the paint may
fall off when come into contact with rubber or vinyl products
for a prolonged period of time.
Energy Conservation
When this product is not used for a prolonged period of time,
turn off the power of the system for safety and energy
conservation purposes.
LCD Screen
Leaving the LCD screen exposed to the sun will damage the
LCD screen. Do not place the product outdoors or near a
window.
Do not scratch or press hard on the LCD screen, or place
objects on top of the screen. Blotches may appear on the
screen and lead to malfunction of the LCD panel.
When using the product in cold places, horizontal stripes and
trailing images may appear or the screen may appear dark.
These are not malfunctions. The screen will appear normal
again when the temperature rises.
Continuous display of still images may cause residual images.
The screen will return to normal after some time.
When the product is in use, the screen or cabinet may
become warm. This is not a malfunction.
Bright/Dark Spots
Bright spots (red, blue or green) and dark spots that are
continuously lit up may appear on the screen.
An LCD panel is manufactured with extremely precise
technology. Although it consists of more than 99.99 %
effective pixels, it may exhibit a very small number of
continuous bright or dark spots on the screen.
Maintaining the LCD Screen
The surface of an LCD screen is specially treated to control
reflections off the surface. Improper maintenance may affect
the performance of the screen. As such, please adhere to the
following points.
● Use a soft cloth such as a cleaning cloth or spectacles
cleaning cloth to lightly wipe off any dirt on the surface of
the screen.
● When there is significant soiling, wipe using a soft cloth
such as a cleaning cloth or spectacles cleaning cloth
soaked with a bit of water.
● Do not use alcohol, benzene, thinner, acidic, alkaline or
abrasive cleaning fluid, or chemical wiping cloth to clean
the screen as they will scratch the surface.
Disposal
● Do not dispose this product with other normal waste
products.
Do not throw the monitor into the rubbish that will be sent to
the dumping-ground.
Precautions During Use

3
A [MENU] Dial (Button)
● When the normal screen is displayed, press this dial for
more than 1 second to display the menu of the camera.
The menu of the camera is displayed when the
[INPUT SOURCE] setting of this viewfinder is set to [VF]
and the GY-HM790 series is in the camera mode.
● When the menu of this viewfinder is displayed, scroll this
dial up and down to move the cursor ( ) up and down to
select an item.
● When the menu of the camera is displayed, use this dial to
select the menu item and setting value. Press the dial to
confirm the selected item.
B [STATUS/MENU] Button
● When the normal screen is displayed, press this button to
display the additional information. The additional
information that is displayed varies according to the input
image.
● Image from the camera’s viewfinder:
Displays of [CAMERA NAME] or [SAFETY ZONE],
[CENTER MARK], [ASPECT MARKER], [ZEBRA],
[SPOT METER], [STATUS] set in the GY-HM790 series.
● Image from this viewfinder’s [SDI INPUT] terminal:
Displays of [SAFETY ZONE], [CENTER MARK],
[ASPECT MARKER], [ZEBRA], [CAMERA NAME] set in the
menu of this viewfinder.
● When the normal screen is displayed, press this button for
more than 1 second to display the menu of this viewfinder.
● When the menu of the camera is displayed, the menu
display switches every time this button is pressed for more
than 1 second.
(Camera’s menu 1 [Favorites Menu])
● When the menu of this viewfinder or the camera is
displayed, press this button to return to the normal screen.
Memo：
● Additional information does not appear in [1 : 1] display.
● The status of displaying or hiding the additional information
is not saved. And the additional information is always
displayed upon startup.
C [BRIGHT] Adjustment Control
For adjusting the brightness of the screen. Turn to the right to
brighten and to the left to darken.
Memo：
● When the camera’s viewfinder image is input, the [VF
BRIGHT] adjustment knob on the camera is disabled.
D [CONTRAST] Adjustment Control
For adjusting the contrast of the screen. Turn to the right to
increase the contrast and to the left to decrease the contrast.
E [PEAKING] Adjustment Control
For adjusting the peaking of the screen. Turn to the right to
sharpen the contour and to the left to soften.
Memo：
● This adjustment control is disabled when the Focus Assist
is activated.
● When the camera’s viewfinder image is input, the [VF
PEAKING] adjustment knob on the camera is disabled.
F [1 : 1] Button
Makes focusing easier when displaying HD videos.
Press this button to display the input video signals in 1: 1 ratio
without resizing. The [ASPECT MARKER], [SAFETY ZONE],
[CENTER MARK], [ZEBRA], [SPOT METER],
[CAMERA NAME], [CAMERA STATUS] display will be
temporarily AOFFB during this display.
Memo：
● Control status of the [1 : 1] button is not saved.
● This button is disabled when [INPUT SOURCE] is set to
ASDIB and SD-SDI signals are input from the
[SDI INPUT] terminal.
● [1 : 1] display is AOFFB in the following cases.
● When the power is turned on
● When the menu of this viewfinder or the camera is
displayed
● When the video format of the display image is changed
● When changed to the return video
G [FOCUS ASSIST] Button
Press this button to display the focus section in color.
Accurate focusing can be done. (PEAKING cannot be
adjusted.)
Memo：
● The color and level of the focus section can be changed at
the Menu screen. (A Page 10)
● When connected to the GY-HM790 series, the
[FOCUS ASSIST] button on the camera is disabled.
● When the return video is displayed, the setting of the
[FOCUS ASSIST] button on this viewfinder is disabled.
● When connected to the GY-HM790 series, the viewfinder
will not operate under the following conditions.
During BARS ON, SKIN COLOR ADJUST or SKIN AREA
SW ON
H TALLY Lamp
Displays the monitor status of the input screen, either in red or
green.
When Tally PGM (Program) signals are input, the lamp lights
up in red.
When Tally PVM (Preview) signals are input, the lamp lights
up in green.
When CALL signals are input, the lamp blinks in red.
Names of Parts and
Functions (Front)
MENU
STATUS
BRIGHT
CONTRAST
PEAKING
1:1
FOCUS
ASSIST
564
564
C
D
E
F
G
H
A
B

4
Introduction
I TALLY Lamp
Displays the monitor status of the input screen in red.
The lamp lights up in red only when Tally PGM (Program)
signals are input.
Memo：
● Use [TALLY] switch K to turn ON/OFF the display function
of this lamp.
J VF CABLE HOLDER
For clamping the provided VF cable when connecting it to the
input terminal.
Memo：
● When connecting the VF cable, secure the cable with the
holder to prevent it from disconnecting. (A Page 5)
K [TALLY] Switch
For turning ON/OFF the TALLY lamp I.
ON : TALLY is enabled.
OFF : TALLY is disabled.
Memo：
● This switch does not affect the operation of the TALLY
lamps H on the screen.
L DIP Switch
Do not touch as the switch function is currently not available.
M [VF CABLE] Input Terminal
For connecting to the VF output terminal (20-pin) of the
GY-HM790 series using the provided VF cable.
N [SDI INPUT] Terminal
The input terminal for SDI video signals.
To display the image from this terminal, set [INPUT SOURCE]
in the [VIDEO FORMAT] menu to ASDIB. (A Page 11)
To use the image from this terminal as return signals, set
[SDI RETURN] to AONB while [INPUT SOURCE] is being set
to AVFB.
Memo：
● You can select the desired video format using
[FRAME RATE] and [FORMAT] in the [VIDEO FORMAT]
menu. (A Page 11)
O [DC INPUT] Terminal (XLR type, 4-pin)
This viewfinder can be operated by connecting to an external
power supply of DC 12 V. (When this viewfinder is connected
to the GY-HM790 series, it is not necessary to connect an
external power supply to this terminal.)
Names of Parts and
Functions (Rear)
DC INPUT SDI INPUT VF CABLE TALLY
ON
OFF K
MNO
J
I
L

5
Setup
Mounting on KA-790G
1 Rotate the lock lever in the arrow direction ( )
as shown in the diagram below.
2 Alignthebracketforviewfindermountontopof
KA-790G with the groove at the viewfinder mount
base and insert from the back of the camera head.
3 Rotate the viewfinder lock lever in the arrow
direction ( ) as shown below and secure the
viewfinder to KA-790G.
Removing the Viewfinder
1 While pressing the Release button, slide the
viewfinder toward the back of the camera head and
remove.
Connecting VF Cable
Before connecting the VF cable, be sure to turn off the
POWER switch on the camera or on the remote control unit.
Connect the viewfinder’s [VF CABLE] terminal to the [VF]
terminal of the GY-HM790 series with the provided VF cable.
Note：
● Be sure to use the cable provided with this viewfinder.
The cable provided with VF-HP840U cannot be used.
1 Insert the provided VF cable fully to the [VF
CABLE] terminal.
2 Loosen the set screw on the cable holder, tilt the
holder at an angle and insert the VF cable from the
bottom into the groove on the holder.
3 Press the cable holder squarely against the
viewfinder and secure the set screw.
If the cable holder is slanted, the set screw cannot be secured
and it may damage the screw hole on the viewfinder.
Note：
● Be sure to turn off the viewfinder and the camera before
connecting or disconnecting the cable.
Installation
1
23
Mount Base
Bracket for Viewfinder Mount
Lock Lever
1
2
Push
Release Button
Lock Lever
VF Cable
Cable Holder
Set Screw
VF Cable
(Good) (No good)

6
Setup
Mounting the Hood Cover (Provided)
1 Align the hood cover with the groove on top of
the viewfinder screen and insert from the top.
2 Secure with the screw located at the center,
below the viewfinder screen.
1 Loosen the panning and tilt lock handle to adjust
the angle of the viewfinder and secure it at an
appropriate angle for easy viewing.
Memo：
● It may be difficult to view the LCD screen at some angles.
View from the direct front angle of the screen.
1 Set the POWER switch on remote control unit or
camera to AONB, to display the image on the
viewfinder.
Memo：
● Depending on the system environment, it may take up to
10 seconds before the image is displayed.
● Select the image to display using [INPUT SOURCE] in the
[VIDEO FORMAT] menu. (Image from the camera’s
viewfinder or this viewfinder’s [SDI INPUT] terminal)
(A Page 11)
1 Turn the [BRIGHT] control to adjust the
brightness of the screen.
To brighten, turn to the right.
2 Turn the [CONTRAST] control to adjust the
contrast of the screen.
To increase the contrast, turn to the right.
3 Turn the [PEAKING] control to adjust the
peaking.
To sharpen the contour, turn to the right.
Memo：
● You can set the frequency band where the contour is
emphasized with the [PEAKING] control in
[PEAKING FREQ.] of the [SHOOTING ASSIST] menu
screen. (A Page 11)
● You can adjust the brightness of the LCD backlight using
[BACK LIGHT] in the [OTHERS] menu. (A Page 12)
● When this viewfinder is used, its display is always on
regardless of the [LCD+VF] setting in the [LCD+VF] menu
of the GY-HM790 series.
Note：
● After switching off the power on the camera or remote
control unit, wait for 10 seconds or more before turning on
the power switch again.
● Turning ON/OFF the power switch in quick succession may
cause malfunction.
Installation (continued)
Adjusting the Position
Screw
Panning
Tilt
Panning and Tilt Lock Handle
Displaying the Images
Adjusting the Picture Quality
MENU
STATUS
BRIGHT
CONTRAST
PEAKING
1:1
FOCUS
ASSIST
564
564
[BRIGHT] Control
[CONTRAST] Control
[PEAKING] Control

7
Menu
Setting the Menu of this Viewfinder
1 Press the [STATUS/MENU] button for 1 second
or more during normal screen display.
The [MAIN MENU] screen appears.
2 Turn the [MENU] dial to move the cursor to the
desired menu screen.
3 Press the [MENU] dial.
The selected menu screen appears.
● Selecting [EXIT] on the [MAIN MENU] screen will return
the screen to the normal screen.
4 Turn the [MENU] dial to move the cursor to the
item to be set and press the [MENU] dial.
The setting value of the item blinks.
● Selecting [PAGE BACK] on the menu screen will return the
screen to the [MAIN MENU] screen.
5 Turn the [MENU] dial to change the setting value.
6 Press the [MENU] dial to stop the blinking of the
setting value.
The setting value is saved at this point.
7 To change other settings, repeat the above steps
3 to 6.
8 After all settings are complete, press the
[STATUS/MENU] button.
This returns to the normal screen.
Entering the Camera Name
1 Display the [OTHERS] menu screen.
2 Turn the [MENU] dial to move the cursor to
[NAME EDIT].
3 Press the [MENU] dial.
The first character blinks.
4 Turn the [MENU] dial to select any character.
5 Press the [MENU] dial to confirm the character.
The next character blinks.
6 Repeat the above steps 4 and 5 to enter 6
characters.
To enter a title of less than 6 characters, use space.
7 After all the characters are entered, press the
[STATUS/MENU] button.
This returns to the normal screen.
Memo：
● To display the camera name on the Status screen, set
[CAMERA NAME] in the [OTHERS] menu screen to AONB.
Returning Menu Settings to Default Settings
At the [OTHERS] menu screen, set [MENU RESET] to
AEXECUTEB and press the [MENU] dial to return the menu
settings to default settings.
Setting the Camera Menu of the GY-HM790 Series
The menu of the camera can be set when [INPUT SOURCE]
is set to AVFB and the GY-HM790 series is in the Camera
mode.
1 When the normal screen is displayed, press the
[MENU] dial for more than 1 second.
The camera’s [MAIN MENU] screen appears.
2 Follow the procedure from step 2 onwards in
[Setting the Menu of this Viewfinder] (A Page 7).
Memo：
● When the menu of the camera is displayed, the menu
display switches every time the [STATUS/MENU] button is
pressed for more than 1 second.
(Camera’s menu 1 [Favorites Menu])
● Operations that involve moving the cursor horizontally
cannot be performed on this viewfinder.
● For details on the menu of the camera, refer to the
[INSTRUCTIONS] of the GY-HM790 series.
Setting the Menu
MENU
STATUS
BRIGHT
CONTRAST
PEAKING
1:1
FOCUS
ASSIST
564
564
[MENU] Dial
[STATUS/MENU]
Button
- - MA I N MENU - -
MARKER SE T T I NG . .
SHOOT I NG ASS I S T . .
V I DEO FORMA T . .
OTHERS . .
EX I T
- - MARKER SE T T I NG - -
ASPECT T YPE V I DEO
RA T I O 1 6 : 9
POS I T I ON CENT ER
ASPECT MARKER ON
T YPE L I NE + HA L F
SA F E T Y ZONE ON
S I Z E 9 5%
CENT ER MARK ON
PAGE BACK
- - OTHERS - -
CAMERA NAME ON
NAME ED I T HP 7 9 0G
B L ACK&WH I T E COLOR
MENU RESE T CANCE L
PAGE BACK
BAC K L I G H T MAX

8
Menu
The Menu screen consists of the following structure as shown below.
MAIN MENU Screen
Menu Screen
- - MARKER SE T T I NG - -
ASPECT T YPE V I DEO
RA T I O 1 6 : 9
POS I T I ON CENT ER
ASPECT MARKER ON
T YPE L I NE + HA L F
SA F E T Y ZONE ON
S I Z E 9 5%
CENT ER MARK ON
PAGE BACK
- - MA I N MENU - -
MARKER SE T T I NG . .
SHOOT I NG ASS I S T . .
V I DEO FORMA T . .
OTHERS . .
EX I T
- - SHOOT I NG ASS I S T - -
FOCUS ASS I S T B L UE
L EVE L M I DD L E
Z EBRA 2 PA T T ERNS
TOP 1 8 0%
BOT TOM1 7 0%
TOP 2 OVER
BOT TOM2 8 0%
PEAK I NG FREQ . M I DD L E
PAGE BACK
- - V I DEO FORMA T - -
I NPUT SOURCE V F
I NPUT S I GNA L AU TO
F RAME RA T E - - - -
FORMA T - - - -
ASPECT [ SD ] 4 : 3
PAGE BACK
- - OTHERS - -
CAMERA NAME ON
NAME ED I T HP 7 9 0G
B L ACK&WH I T E COLOR
PAGE BACK
B A C K L I G H T MAX
MENU RESET CANCEL
SDI RETURN OFF
Menu Screen Description
MARKER SETTING .. This item sets the various markers to be displayed in the images.
SHOOTING ASSIST .. This item sets the shooting assist function.
VIDEO FORMAT .. This item sets the format for video input or SDI video input.
OTHERS .. This item sets the camera name and initializes the menu.
EXIT This returns to the normal screen.

9
MARKER SETTING Menu Screen
Settings in bold are factory default settings.
Memo：
● The [MARKER SETTING] menu is valid for the image from this viewfinder’s [SDI INPUT] terminal. When [INPUT SOURCE] in
the [VIDEO FORMAT] menu is set to AVFB, all items in the [MARKER SETTING] menu appear as A----B and cannot be
selected. For the image from the camera’s viewfinder, set the [Marker Setting] menu on the camera by using the [MENU] dial to
control the menu of the camera (A Page 7).
Item Setting Value Description
ASPECT TYPE VIDEO
CINEMA
This item sets the purpose of the marker.
VIDEO : Aspect for TV broadcast shooting.
CINEMA : Aspect for cinema shooting.
Memo：
● When the input format is 4:3, ACINEMAB cannot be selected. ([VIDEO] is displayed.)
RATIO This item sets the aspect ratio of the marker. It displays the configured aspect ratio of the
marker. When set to A16:9+4:3B, the 16:9 and 4:3 marker are displayed at the same
time.
Memo：
● A16:9+4:3B is displayed when the VIDEO FORMAT at the camera is HD mode.
When ASPECT
TYPE is set to
AVIDEOB
16:9
4:3
14:9
16:9+4:3
When ASPECT
TYPE is set to
ACINEMAB
2.35:1
1:66:1
1:75:1
1:85:1
POSITION CENTER
C.HEADRM
This item sets the display position of the marker.
CENTER : Sets the display position of the marker at the center of the screen.
C.HEADRM : Sets the display position of the marker at the upper side of the screen.
Memo：
● AC.HEADRMB can only be set when [RATIO] is A2.35:1B or A1:85:1B. For other
settings, [CENTER] will be displayed and setting is disabled.
ASPECT MARKER OFF
ON
This item sets the marker outside the aspect area.
OFF : Cancels the marker outside the aspect area.
ON : Displays the marker outside the aspect area.
Memo：
● When camera output is set to BARS, this function is AOFFB during Return Video
display, 1:1 display and when status display is OFF.
TYPE LINE
HALFTONE
LINE+HALF
This item sets the type of labeling for markers outside the aspect area.
LINE : Displays the aspect area in lines.
HALFTONE : Displays the image level outside the aspect area in half the brightness.
LINE+HALF : Displays the aspect area in lines and sets outside the area in half the
brightness.
SAFETY ZONE OFF
ON
This item sets the marker inside the aspect area.
OFF : Cancels the marker inside the aspect area.
ON : Displays the marker inside the aspect area.
Memo：
SIZE 95 %,
93 %, 90 %
88 %, 80 %
This item sets the display percentage for markers inside the aspect area.
CENTER MARK OFF
ON
This item sets whether to display markers in the center.
OFF : Cancels the center marker.
ON : Displays the center marker.
Memo：
PAGE BACK ^ This returns to the [MAIN MENU] screen.

10
Menu
SHOOTING ASSIST Menu Screen
Menu Screen (continued)
FOCUS ASSIST RED
GREEN
BLUE
This item sets the display color of the focus section when the FOCUS ASSIST
function is operated.
This item is enabled when [INPUT SOURCE] in the [VIDEO FORMAT] menu is set to
ASDIB.
RED : Displays the focus section in red.
GREEN : Displays the focus section in green.
BLUE : Displays the focus section in blue.
Memo：
● When [INPUT SOURCE] in the [VIDEO FORMAT] menu is set to AVFB, all items in
the [MARKER SETTING] menu appear as A----B and cannot be selected. For the
image from the camera’s viewfinder, set the [Marker Setting] menu by using the
[MENU] dial to control the menu of the camera (A Page 7).
● The [FORMAT] button of the GY-HM790 series is disabled.
LEVEL LOW
MIDDLE
HIGH
This item sets the focus level during the FOCUS ASSIST operation.
LOW : Displays the focus section.
MIDDLE : Emphasizes the focus section.
HIGH : Further emphasizes the focus section.
ZEBRA OFF
1PATTERN
2PATTERNS
Select whether to display Zebra and the display format.
ASDIB.
OFF : Does not display Zebra.
1PATTERN : Displays the brightness set between [TOP1] and [BOTTOM1] in Zebra.
2PATTERNS : In addition to [1PATTERN], this displays the brightness set between
[TOP2] and [BOTTOM2] in Zebra.
Memo：
● When [INPUT SOURCE] in the [VIDEO FORMAT] menu is set to AVFB, all items in
the [MARKER SETTING] menu appear as A----B and cannot be selected. For the
image from the camera’s viewfinder, set this function using the [MENU] dial to
control the menu of the camera (A Page 7).
TOP1 5 % ~ 80 % ~ 100 %
OVER
This item sets the upper limit of the brightness of Zebra 1.
5 % ~ 100 % : Displays the brightness below this setting as Zebra. (The value can be
set in intervals of 5 %.)
OVER : Cancels the upper limit of the brightness of the displayed Zebra.
Memo：
● When [ZEBRA] is set to AOFFB, A-----B will be displayed and setting is disabled.
BOTTOM1 0 % ~ 70 % ~ 100 % This item sets the lower limit of the brightness of Zebra 1.
0 % ~ 100 % : Displays the brightness above this setting as Zebra. (The value can
be set in intervals of 5 %.)
Memo：
● When [ZEBRA] is set to AOFFB, A-----B will be displayed and setting is disabled.
TOP2 5 % ~ 100 %
OVER
This item sets the upper limit of the brightness of Zebra 2.
5 % ~ 100 % : Displays the brightness below this setting as Zebra. (The value can be
OVER : Cancels the upper limit of the brightness of the displayed Zebra.
Memo：
● When [ZEBRA] is set to AOFFB or A1PATTERNB, A-----B will be displayed and
setting is disabled.
BOTTOM2 0 % ~ 80 % ~ 100 % This item sets the lower limit of the brightness of Zebra 2.
0 % ~ 100 % : Displays the brightness above this setting as Zebra. (The value can be
Memo：
● When [ZEBRA] is set to AOFFB or A1PATTERNB, [----] will be displayed and setting
is disabled.

11
VIDEO FORMAT Menu Screen
PEAKING FREQ. LOW
MIDDLE
HIGH
This item sets the frequency band where the contour is emphasized with the
[PEAKING] control.
LOW : Emphasizes the low frequency band.
MIDDLE : Emphasizes the intermediate frequency band.
HIGH : Emphasizes the high frequency band.
Memo：
● This item is disabled when the Focus Assist is activated.
INPUT SOURCE VF
SDI
Select the input image to display on the LCD screen.
VF : Inputs the image from the camera’s viewfinder.
SDI : Inputs the image from this viewfinder’s [SDI INPUT] terminal.
SDI RETURN OFF
ON
This item sets whether to use the signals input to this viewfinder’s [SDI INPUT]
terminal as return signals.
OFF : Return signals are supplied by the camera. Does not use the signals input to the
[SDI INPUT] terminal.
ON : Uses the signals input to the [SDI INPUT] terminal as the return signals.
Memo：
● When [INPUT SOURCE] is set to ASDIB, this item appears as A----B and cannot be
selected.
INPUT SIGNAL AUTO
MANUAL
Select whether to automatically detect the video format of the input signals.
AUTO : Automatically detects the video format.
MANUAL : The video format is not automatically detected; select the video format
using [FRAME RATE] or [FORMAT].
Memo：
● When the return video is input, set this item to AAUTOB.
FRAME RATE 60
50
This item sets the frame rate of the input signals.
60 : Select this when the frame rate of the input signals is 60 Hz.
50 : Select this when the frame rate of the input signals is 50 Hz.
Memo：
● When [INPUT SIGNAL] is set to AAUTOB, this item appears as A----B and cannot
be selected.
FORMAT Select the format of the input signals.
1080I : Select this when the input signal is HD1080i.
720P : Select this when the input signal is HD720p.
480I : Select this when the input signal is SD480i.
576I : Select this when the input signal is SD576i.
Memo：
● When [INPUT SIGNAL] is set to AAUTOB, this item appears as A----B and cannot
be selected.
● If [System Definition] of the GY-HM790 series is set to ASD (DV)B when
[INPUT SOURCE] is set to AVFB, select A1080IB.
● When this item is set to A720PB while the [INPUT SOURCE] is set to AVFB, the
return video supplied by the camera is not displayed.
● A480IB or A576IB can only be selected when [INPUT SOURCE] is set to ASDIB.
When FRAME
RATE is set to
60
1080I
720P
480I
When FRAME
RATE is set to
50
1080I
720P
576I
ASPECT[SD] 4:3
16:9
This item sets the aspect of the screen display when SD signals are input.
This item is enabled only when SDI signals are input to the [SDI INPUT] terminal
while [INPUT SOURCE] in the [VIDEO FORMAT] menu is set to ASDIB.
4:3 : Displays 4:3 input signals as-is.
16:9 : Displays 4:3 images in 16:9. This is valid when the input signals are at
SQUEEZE.

12
Menu
OTHERS Menu Screen
Ⅵ Items with restricted operation at VF-HP790G depending on camera settings
Menu Screen (continued)
CAMERA NAME OFF
ON
This item sets whether to display the camera name on the STATUS screen.
OFF : Does not display.
ON : Display.
Memo：
● The camera name is not displayed during MENU display.
NAME EDIT A to Z, 0 to 9,
- . / [ ]
Enter the camera name.
Up to 6 characters can be entered. (A Page 7)
The default setting is AHP790GB.
BLACK & WHITE COLOR
B&W
This allows the images to be viewed in black and white.
ASDIB. (A Page 11)
COLOR : Displays color images.
B&W : Displays B&W images.
Memo：
● For the image from the camera’s viewfinder, set this function by using the [MENU]
dial to control the menu of the camera (A Page 7).
BACK LIGHT MIN, 1 to 9, MAX This item adjusts the brightness of the LCD backlight.
Increase the value to increase the brightness.　
MENU RESET CANCEL
EXECUTE
This item returns all menu settings to factory default settings.
CANCEL : Cancels Menu Reset.
EXECUTE : Executes Menu Reset.
Precautions when Using
with the GY-HM790 Series
Setting Item Setting Value Restricted Operation
Tally System Studio The TALLY lamp displays TALLY(PGM/PVM), CALL and warning from the remote
control.
Other than Studio The TALLY lamp displays the camera operation status and warning.

13
Others
VF Terminal
20-pin Connector
DC INPUT Terminal
4-pin Connector
Terminal Specifications
Pin No. Name IN/OUT
1 D0+ IN
2 GND0 ^
3 GND ^
4 12 V IN
5 SCL (D3-) IN
6 D0- IN
7 CLK+ IN
8 CLK- IN
9 GNDC ^
10 SDA (D3+) IN
11 D1+ IN
12 GND 1 ^
13 D2+ IN
14 GND ^
15 VF_SEN (GND3) IN
16 D1- IN
17 GND2 ^
18 D2- IN
19 NRESET IN/OUT
20 VF_D_IN OUT
Pin No. Name IN/OUT
1 GND ^
2 NC ^
3 NC ^
4 +12 V IN
3 4 521
8 9 1076
13 14 151211
18 19 201716
1
2 3
4
3 4 521
8 9 1076
13 14 151211
18 19 201716
[VF CABLE] Connector [DC INPUT] Connector

14
Others
Ⅵ General
Connecting Device : GY-HM790 series
Power Supply : 12 V DC
(11 V DC to 18 V DC)
Power Consumption : Approx. 11 W and
below
Ambient Temperature : 0 °C to 40 °C
Allowable Operating Humidity : 30 % RH to 80 % RH
Mass : 1.6 kg (excluding hood)
1.9 kg (including hood)
Ⅵ LCD Specifications
Screen Size : 8.4 inch
Aspect Ratio : 4:3
LCD Panel : TFT-LCD
Resolution : 1024 x 768 dots (XGA)
Display Color : Approx. 16.77 million
colors
View Angle (Standard) : 60°/80°/80°/80°
(Top/Bottom/Left/Right)
Brightness : 300 cd/m²
Contrast Ratio : 400:1
Ⅵ Input Terminal
SDI Input : HD/SD SDI video signal input, BNC
(unbalanced)
HD-SDI : Compliant with SMPTE 259 M
SD-SDI : Compliant with SMPTE 292 M
Ⅵ Accessories
Instructions...........................................................................1
Warranty Card (For USA & Canada) ....................................1
VF Cable ..............................................................................1
Hood Cover ..........................................................................1
Troubleshooting
Troubleshooting Check Point
Power does not turn on Insert the VF cable or power cable fully.
Turn on the power supply of the GY-HM790 series/RM-HP250.
There are no images Insert the VF cable fully.
Turn on the power supply of the GY-HM790 series/RM-HP250 and set the correct
settings.
Check the setting of [INPUT SOURCE] in the [VIDEO FORMAT] menu. (A Page 11)
Is [INPUT SIGNAL] in the [VIDEO FORMAT] menu set to AMANUALB? In this case,
set it to AAUTOB or set the video format correctly. (A Page 11)
The color is incorrect / There is no color Insert the VF cable or power cable fully.
Adjust the [CONTRAST] and [BRIGHT] adjustment controls.
Is [BLACK & WHITE] in the [OTHERS] menu set to AB&WB? In this case, set it to
ACOLORB. (A Page 12)
Blurry images Adjust the [BRIGHT] and [PEAKING] adjustment controls.
The field angle size of the viewfinder is
wrong
Check the settings on page 11.
The images appear distorted Check the settings on page 11.
Specifications

15
Dimensional Outline Drawing (Unit: mm)
* The specifications and appearance of this product and other related products may be modified for improvement without prior
notice.
With Hood Without Hood
261
130261
195
184
90
6712
MENU
STATUS
BRIGHT
CONTRAST
PEAKING
1:1
FOCUS
ASSIST
564
564
564

JVC VF-HP790 LCD Studio Viewfinder

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