Technicolor - Thomson LDK 20(S) Dummy offset adjustment, DC level adjustment at 45oC

Sync./Shading Board

8.On connector B of the service extender remove the short circuits on the input to Video Processor 1 Board by disconnecting the jumpers from B7 to B9, B11 to B13 and B17 to B19,

Reconnect	A6 to B6
	A7 to B7
	A9 to B9
	A11 to B11
	A12 to B12
	A13 to B13
	A15 to B15
	A17 to B17
	A19 to B19 on connector B of the service extender.

Dummy offset adjustment

9. On Video Processor 1 Board adjust video level equal to blanking DC level.

Measure at:

VP1

X55-12 (R)

X55-6 (G)

X55-15 (B)

Adjust with:

VP1

ZR211

ZR411

ZR611

Required result:

Dummy offset

Correct:

DC level adjustment at 45oC

10.The following adjustment is temperature sensitive.

If an oven is used to adjust at 45°C (the recommended adjustment temperature) ensure that the temperature does not rise above 45°C as this will damage the camera.

11.On Sync./Shading Board adjust the DC level potentiometer.

Measure at:

MP209 (R)

MP409 (G)

MP609 (B)

Adjust with:

ZR265

ZR465

ZR665

Required result:

-250mVdc at 45°C

-250mVdc at 45°C

-250mVdc at 45°C

12. Remove camera from oven and carry out the following adjustments while the camera is cooling down.

Pulse compensation

13.In the Install/Gain menu set the gain for + to 12dB and for ++ to 30dB

14.On MCP set:

OPERATE MENU	Gamma	:	1
	Gain	:	Max gain

15.While switching between Nom. and 1\1000 exposure time on MCP or OCP adjust for no difference between in set-up levels (make the adjustment when the switch is in the Nom. position).

Measure at:

VF out R

VF out G

VF out B

Adjust with:

ZR266

ZR466

ZR666

Required result:

No difference in

set-up level

Adjustments Technical Manual LDK 20(S) - Studio Camera 4-29