Sanyo PLC-XP41, Service Manual

Page: 23 / 122

[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 (XGA)
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.
Note:
* Please refer to “Service Adjustment Menu Operation” for entering to the service mode and adjusting the service
data.
White 100%
Black 100%
-23-
After replacing the Power Board readjust the Output
voltage adjustment as follows.
1. Connect a digital voltmeter to pin 1 (+) of
K6A
and
chassis ground (-).
2. Adjust the voltage by using
VR601
on the power
board as following.
AC Input Reading
230V 370 ±2Vdc
or 120V 340 ±2Vdc
Caution:
Be sure to connect the lamp when taking this adjust-
ment.
●
Circuit Adjustments
CAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the follow-
ing adjustments except requiring the readjustments in servicing otherwise it may cause loss of per-
formance and product safety.
Electrical Adjustments
Output Voltage adjustment
1. Receive the 16-step gray scale video signal with
Input 3 [VIDEO] mode.
2. Connect a digital voltmeter to pin 3 (+) of
CN6A
and
chassis ground (-).
3. Adjust the voltage to be
15.8
±0.1Vdc by using
VR681
on the power board.
+16V adjustment
1. Receive the 16-step gray scale computer signal with
Input 1 [COMPUTER] mode.
2. Enter the service mode.
3. Connect a digital voltmeter to test point “
TP531
” (+)
and chassis ground (-).
4. Select group no. “
5
”, item no. “
1
” and change data
value to adjust the voltage to be
7.50
±0.1Vdc.
5. Connect a digital voltmeter to test point “
TP501
” (+)
and chassis ground (-).
6. Select item no. “
0
” and change data value to adjust
the voltage to be
7.50
±0.1Vdc.
7. Connect a digital voltmeter to test point “
TP561
” (+)
and chassis ground (-).
8. Select item no. “
2
” and change data value to adjust
the voltage to be
7.50
±0.1Vdc.
Video Center adjustment
16 steps gray scale pattern