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Service Adjustment
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.
WARNING : USE UV RADIATION EYE AND SKIN PRO-
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 ........... 0.7Vp-p/75W terminated, Color Bar
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 voltage
adjustment as follows.
1. Connect a digital voltmeter to pins 2 (+) and 1 (-) of
2. Setting Lamp control "High".
3. Adjust the voltage by using VR601 as following.
AC Input
230V
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.
TECTION DURING SERVICING.
(Composite video signal)
(Component video signal)
pattern
Reading
370V ±2V
1. Fan Control adjustment
1. Enter the service mode.
2. Connect a digital voltmeter to test point "
chassis ground (-). Select group no. "
K6A
.
change data value to adjust voltage to be
3. Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
value to adjust voltage to be
4. Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
value to adjust voltage to be
5. Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
data value to adjust voltage to be
6. Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
value to adjust voltage to be
7. Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
value to adjust voltage to be
- 42 -
16 steps gray scale pattern
White 100%
TPFANA
250
", item no. "
5.0 ±0.1V
2
" and change data
5.0 ±0.1V
.
4
" and change data
5.0 ±0.1V
.
1
13.5 ±0.1V
3
" and change data
13.5 ±0.1V
.
5
" and change data
13.5 ±0.1V
.
Black 100%
" (+) and
0
" and
.
TPFANB
" (+)
TPFANC
" (+)
TPFANA
" (+)
" and change
.
TPFANB
" (+)
TPFANC
" (+)
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