Sanyo PLC-XT11, Service Manual

Page: 25 / 104

-25-
[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 the service mode and adjusting the service data.
White 100%
Black 100%
●
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
1. Receive the 16-step gray scale computer signal with
Computer 1 [Analog RGB] 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. “
0
” and adjust the volt-
age to be
7.50
±0.1Vdc by changing the Data value.
5. Connect a digital voltmeter to test point “
TP501
” (+)
and chassis ground (-).
6. Select Item no. “
1
” and adjust the voltage to be
7.50
±0.1Vdc by changing the Data value.
7. Connect a digital voltmeter to test point “
TP561
” (+)
and chassis ground (-).
8. Select Item no. “
2
” and adjust the voltage to be
7.50
±0.1Vdc by changing the Data value.
Video Center adjustment
2
16 steps gray scale pattern
1. Set the lamp mode to “ECO” with the menu function.
2. Enter the service mode and select group no. “
11
” and
Item no. “
5
”. Set Data value to “
1
”.
3. Connect a digital voltmeter to test point “
TPFAN1
” (+)
and chassis ground (-).
4. Select group no. “
11
”, Item no. “
86
” and adjust the volt-
age to be
4.5
±0.1Vdc by changing the Data value.
Select Item no. “
87
” and adjust the voltage to be
13.8
±0.1Vdc by changing the Data value.
5. Connect a digital voltmeter to test point “
TPFAN2
” (+)
and chassis ground (-).
6. Select Item no. “
88
” and adjust the voltage to be
4.5
±0.1Vdc by changing the Data value.
Select Item no. “
89
” and adjust the voltage to be
13.8
±0.1Vdc by changing the Data value.
7. Connect a digital voltmeter to test point “
TPFAN3
” (+)
and chassis ground (-).
8. Select Item no. “
90
” and adjust the voltage to be
4.5
±0.1Vdc by changing the Data value.
Select Item no. “
91
” and adjust the voltage to be
13.8
±0.1Vdc by changing the Data value.
9. Select group no. “
11
” and Item no. “
5
”. Set Data value
to “
0
”, and set the lamp mode to “Normal” with the
menu function.
Fan Voltage adjustment
1