Circuit Adjustments - Sanyo PLC-WXU30 Service Manual

Electrical Adjustments

Circuit Adjustments

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. Before adjustment, please turn on the projector more than ten minutes.
WArNING : uSe uV rAdIAtIoN eYe ANd SKIN
cAutIoN:
to prevent suffer of uV radiation, those adjustments
must be completed within 25 minutes.
[Adjustment Condition]
● Input signal
Video signal ........................ 1.0Vp-p/75W terminated, 16 steps gray scale
Component Video signal ...... 1.0Vp-p/75W terminated, 8 color 100% color
Computer signal ................... 0.7Vp-p/75W terminated, 16 steps gray scale
● 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.
Output Voltage adjustment
After replacing the Power Board readjust the Output volt-
age adjustment as follows.
1. Connect a digital voltmeter to pins 1 (+) and  (-) of
K6A
.
. Adjust the voltage by using VR601 as following.
AC Input Reading
30V 370V ±V
Caution:
Be sure to connect the lamp when taking this adjustment.
* This adjustment is not required even if the power board
is replaced because this adjustment is carried out be-
fore parts shipment.
ProtectIoN durING SerVIcING.
(Composite video signal)
bar or 16 step gray scale (Component video
signal)
pattern
16 steps gray scale pattern
White 100%
z Fan Control adjustment
1. Enter the service mode.
. Connect a digital voltmeter to test point "
and chassis ground (-). Select group no. "
0
no. " " and change data value to adjust voltage to be
5.0 ±0.1V
.
3. Connect a digital voltmeter to test point "
and chassis ground (-). Select group no. "
2
no. " " and change data value to adjust voltage to be
5.0 ±0.1V
.
4. Connect a digital voltmeter to test point "
and chassis ground (-). Select group no. "
4
no. " " and change data value to adjust voltage to be
5.0 ±0.1V
.
5. Connect a digital voltmeter to test point "
and chassis ground (-). Select group no. "
1
no. " " and change data value to adjust voltage to be
13.5 ±0.1V
.
6. Connect a digital voltmeter to test point "
and chassis ground (-). Select group no. "
3
no. " " and change data value to adjust voltage to be
13.5 ±0.1V
.
7. Connect a digital voltmeter to test point "
and chassis ground (-). Select group no. "
5
no. " " and change data value to adjust voltage to be
13.5 ±0.1V
.
-7-
Black 100%
tPFANA
" (+)
250
", item
tPFANB
" (+)
250
",item
tPFANc
" (+)
250
",item
tPFANA
" (+)
250
",item
tPFANB
" (+)
250
",item
tPFANc
" (+)
250
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