Canon D78-5382, Service Manual

Page: 52 / 126

2. ELECTRICAL ADJUSTMENTS
[Adjustment condition]
●
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
(SVGA)
Component Video signal ........0.7Vp-p/75
Ω
terminated, 16 steps
gray scale
(Component video signal with 480p or 1080i format)
●
Picture control mode .............."STANDARD" mode unless otherwise noted.
2.1 Output Voltage Adjustment
After replacing the Power Board, PF.C. 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 Reading
230V 370V ± 2V
* This adjustment is not required even if the power board is replaced because this
adjustment is carried out before parts shipment.
Part 3: Adjustment
3-7
CAUTION
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 Be sure to connect the lamp when taking this adjustment.
CAUTION
Please refer to "Service Adjustment Menu Operation" for entering the
service mode and adjusting the service data.
White 100%
Black 100%
16 steps gray scale pattern
Fig. 3-2