BOXLIGHT CP-12tA, Руководство по обслуживанию

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[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 (SVGA)
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
16 steps gray scale pattern
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
VR611
as following.
AC Input Reading
230V 370V ±2V
Caution:
Be sure to connect the lamp when taking this adjust-
ment.
Output Voltage adjustment
1. Set the lamp mode to “ECO” with the menu function.
2. Enter the service mode and select item no. “
74
”. Set
data value to “
1
”.
3. Connect a digital voltmeter to test point “
TP12V1
”
(+) and chassis ground (-). Select item no. “
75
” and
adjust the voltage to be
8.0
±0.1Vdc by changing
the Data value.
4. Connect a digital voltmeter to test point “
TP12V2
”
(+) and chassis ground (-). Select item no. “
76
” and
adjust the voltage to be
9.0
±0.1Vdc by changing
the Data value.
5. Select item no. “
74
” and set data value to “
3
”.
6. Connect a digital voltmeter to test point “
TP12V1
”
(+) and chassis ground (-). Select item no. “
77
” and
adjust the voltage to be
13.5
±0.1Vdc by changing
the Data value.
7. Connect a digital voltmeter to test point “
TP12V2
”
(+) and chassis ground (-). Select item no. “
78
” and
adjust the voltage to be
13.5
±0.1Vdc by changing
the Data value.
8. Select item no. “
74
” and set Data value to “
0
”, and
set the lamp mode to “Normal” with the menu func-
tion.
z
Fan Voltage adjustment
* This adjustment is not required even if the power
board is replaced because this adjustment is carried
out before parts shipment.