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(No.HC034<Rev.001>)1-7

(2) Disconnect the wires from the connectors CN14, CN24,

CN43

and CN11 on the AUDIO board, then remove the

right side cover assembly.

Fig.10

3.3 HOW TO REMOVE THE OPTICAL BLOCK ASSEMBLY

(See figure 11, figure 12, figure 13 and figure 14)

(1) Remove the left side cover assembly and right side cover

assembly (Refer to the 3.2)

(2) Disconnect the FPC from the board to board connectors

CN26

, CN27 and CN28 on the CAM board.

(3) Disconnect the wire from the connector CN90

on the CAM

board.

Fig.11

(4) Remove the mount screw.

(5) Remove the four screws (S8) attaching the optical block

assembly, then remove the optical block assembly.

Fig.12

(6) Remove the three screws (S12) attaching the fan motor

and FNC board.

Fig.13

(7) When replacing the optical block, be sure to attach the orig-

inal fan motor and FNC board to new optical block, be-

cause those are not included on the optical block

assembly.

Fig.14

CAUTION :

• When removing/mounting the optical block assembly in the

camera, take care not to damage cables, also the position-

ing of the wire assembly is important. A malfunction may

occur if wires are somehow caught up.

• Take also care not to press the IS boards or cables. If

pressing strongly, the RGB registration of CCDs may be

changed.

AUDIO Board

Right side cover assembly

CN24

CN11

CN14

CN43

Optical block assembly

CN90

CN28

CN26

CAM Board

CN27

Note:

The glue has been applied to the mount screw.

Replace with new one when the mount screw was removed.

Caution on handling the FAN MOTOR

To prevent abnormal sound of the FAN:

• Do not hold the FAN MOTOR shaft or the propeller as the

FAN MOTOR has a precision structure. (The force of 0.3 N

or over is NG.)

• Be careful not to give shock.

• Spread a cushion on the workbench. Do not lay down the

FAN MOTOR on a hard board or a floor.

(The FAN MOTOR dropped to the floor off the workbench

is NG.)

NOTE :

• The CCDs are bonded precisely to the prism by UV-curable

adhesive. In case of trouble with a CCD, it is not possible to

replace an individual CCD, but the entire optical block as-

sembly should be replaced.

• The optical block assembly supplied as a service part.

Optical block assembly

(S8)

Mount screw

FNC Board

(S12)

Fan motor

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JVC GY-HM790U Specifications

General

Sensor type	CCD
Total megapixels	- MP
Optical sensor size	1/3 \
Digital zoom	- x
Optical zoom	14 x
Image stabilizer	No
Focal length range	4.4 - 61.6 mm
Interchangeable lens	Yes
Focal length (35mm film equivalent)	32 - 448 mm
Camcorder media type	Memory card
Compatible memory cards	SDHC
Internal storage capacity	- GB
Built-in flash	-
Display diagonal	4.3 \
Display resolution	800 x 480 pixels
Display resolution (numeric)	410000 pixels
Viewfinder resolution	1226000 pixels
Viewfinder screen size	0.45 \
Camcorder type	Shoulder camcorder
Product color	Black
Video resolutions	1280 x 720, 1440 x 1080, 1920 x 1080 pixels
Supported video modes	1080i, 576i, 720p
Video formats supported	MPEG2
Maximum video resolution	1920 x 1080 pixels
Bitrate at maximum video resolution	35 Mbit/s
Maximum image resolution	- pixels
Headphone connectivity	3.5 mm
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Component video (YPbPr/YCbCr) out	1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	0
Battery capacity	- mAh
Battery life (max)	- h
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	0 - 85 %
Operating relative humidity (H-H)	30 - 80 %