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Electrical Adjustments
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.
[Adjustment Condition]
Input signal
Video signal .......................... 1.0Vp-p/75Ω terminated, 16 steps gray scale (Composite video signal)
Computer signal...................... 0.7Vp-p/75Ω terminated, 16 steps gray scale pattern (XGA)
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.
Output Voltage adjustment
After replacing the Power Board, PF.C. Board, readjust
the Output voltage adjustment as follows.
1. Connect a digital voltmeter to pins 1 (+) and 3 (-) of
K6D
.
2. Adjust the voltage by using
AC Input
230V
or
120V
Caution:
Be sure to connect the lamp when taking this adjust-
ment.
Fan Voltage adjustment
1. Enter the service mode and select group no. "
0
item no. "
". Set data value to "
2. Connect a digital voltmeter to test point "TP12V1" (+)
and chassis ground (-). Select item no. "
data value to adjust voltage to be 8.5 ±0.1V.
3. Connect a digital voltmeter to test point "TP12V2" (+)
and chassis ground (-). Select item no. "
change data value to adjust voltage to be 9.0 ±0.1V.
11
4. Select group no. "
" and item no. "
3
value to "
".
5. Connect a digital voltmeter to test point "TP12V1" (+)
and chassis ground (-). Select item no. "
data value to adjust voltage to be 13.0 ±0.1V.
6. Connect a digital voltmeter to test point "TP12V2" (+)
and chassis ground (-). Select item no. "
data value to adjust voltage to be 13.5 ±0.1V.
VR611
as following.
Reading
370V ±2V
340V ±2V
11
1
".
1
" and change
2
" and
0
" and set data
3
" and change
4
" and change
Pedestal adjustment
1. Receive the 16-step grey scale video signal.
2. Set to VIDEO mode.
3. Enter the service mode.
[R-PEDESTAL ADJUSTMENT]
4. Connect an oscilloscope to test point "
and chassis ground (-).
5. Select group no. "
value to adjust the pedestal level and black level to be
the same level.
[G-PEDESTAL ADJUSTMENT]
6. Connect an oscilloscope to test point "
and chassis ground (-).
7. Select group no. "
value to adjust the pedestal level and black level to be
the same level.
[B-PEDESTAL ADJUSTMENT]
8. Connect an oscilloscope to test point "
" and
and chassis ground (-).
9. Select group no. "
value to adjust the pedestal level and black level to be
the same level.
Pedestal level = Black level
-26-
TP201R
3
14
", item no. "
" and change data
TP201G
3
15
", item no. "
" and change data
TP201B
3
16
", item no. "
" and change data
(a)
" (+)
" (+)
" (+)
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