Canon D78-5532, Service Manual, Page: 51 / 119

Part 3: Adjustment
3-8
2. CIRCUIT ADJUSTMENTS
[Adjustment conditions]
●
Input signal
Video signal ............................1.0Vp-p/75
Ω
terminated, 16 steps gray scale
(Composite video signal)
Computer signal .....................0.7Vp-p/75
Ω
terminated, 16 steps gray scale pattern
Component Video signal .........0.7Vp-p/75
Ω
terminated, 16 steps gray scale
(Component video signal with 480p, 575p, 720p or
1080i format)
●
Picture control mode ...............“STANDARD” mode unless otherwise noted.
Note:
Please refer to “Service Adjustment Menu Operation” for entering the service mode and
adjusting the service data.
2.1 Output Voltage Adjustment
After replacing the Power Board readjust the Output voltage adjustment as follows.
1. Connect a digital voltmeter to pins 1 (+) and 3 (–) of K6D .
2. Adjust the voltage by using VR611 as following.
AC Input: 230V Reading: 380V ± 2V
* This adjustment is not required even if the power board is replaced because this
adjustment is carried out before parts shipment.
Fig. 3-2
The each circuit has been made by the fine adjustment at factory. Do not
attempt to adjust the following adjustments except requiring the
readjustments in servicing otherwise it may cause loss of performance
and product safety.
CAUTION
White 100%
Black 100%
16 steps gray scale pattern
Be sure to connect the lamp when taking this adjustment.
CAUTION