Sanyo PLC-XL50, Service Manual, Page: 44 / 126

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Service Adjustment
[Adjustment Condition]
●
Input signal
Video signal ................................. 1.0Vp-p/75
W
terminated, 16 steps gray scale
(Composite video signal)
Component Video signal ........... 0.7Vp-p/75
W
terminated, Color Bar
(Component video signal)
Computer signal ........................... 0.7Vp-p/75
W
terminated, 16 steps gray scale
pattern
●
Image 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 following adjust-
ments except requiring the readjustments in servicing otherwise it may cause loss of performance and product
safety.
16 steps gray scale pattern
After replacing the Power Board readjust the Output voltage
adjustment as follows.
1. Connect a digital voltmeter to pins 2 (+) and 1 (-) of
K6A
.
2. Setting Lamp control " High ".
3. Adjust the voltage by using VR601 as following.
AC Input Reading
230V 370V ±2V
Caution:
Be sure to connect the lamp and lamp ballast when taking
this adjustment.
* This adjustment is not required even if the power board
is replaced because this adjustment is carried out before
parts shipment.
Output Voltage adjustment
WARNING : USE UV RADIATION EYE AND SKIN PRO-
TECTION DURING SERVICING.
CAUTION:
To prevent suffer of UV radiation, those adjustments must be
completed within 25 minutes.
1. Enter the service mode.
2. Connect a digital voltmeter to test point “
TPFANA
” (+) and
chassis ground (-). Select group no. “
250
”, item no. “
0
” and
change data value to adjust voltage to be
5.0 ±0.1V
.
3. Connect a digital voltmeter to test point “
TPFANB
” (+)
and chassis ground (-). Select item no. “
2
” and change data
value to adjust voltage to be
5.0 ±0.1V
.
4. Connect a digital voltmeter to test point “
TPFANC
” (+)
and chassis ground (-). Select item no. “
4
” and change data
value to adjust voltage to be
5.0 ±0.1V
.
5. Connect a digital voltmeter to test point “
TPFANA
” (+)
and chassis ground (-). Select item no. “
1
” and change
data value to adjust voltage to be
13.5 ±0.1V
.
6. Connect a digital voltmeter to test point “
TPFANB
” (+)
and chassis ground (-). Select item no. “
3
” and change data
value to adjust voltage to be
13.5 ±0.1V
.
7. Connect a digital voltmeter to test point “
TPFANC
” (+)
and chassis ground (-). Select item no. “
5
” and change data
value to adjust voltage to be
13.5 ±0.1V
.
1. Fan Control adjustment