Fan Control Adjustment; Clamp Adjustment [Pc] - Canon LV-7215U Service Manual

Part 3: Adjustment

2.2 Fan Control Adjustment

1. Set the lamp mode to "Normal" and then enter the service mode.
2. Select group no. "111", item no. "5" and set data value to "1".
3. Connect a digital voltmeter to test point "TP12V1" (+) and chassis ground (–). Select
item no. "89" and change data value to adjust voltage to be 6.5 ± 0.1V.
4. Connect a digital voltmeter to test point "TP12V2" (+) and chassis ground (–). Select
item no. "91" and change data value to adjust voltage to be 6.5 ± 0.1V.
5. Connect a digital voltmeter to test point "TP12V1" (+) and chassis ground (–). Select
item no. "90" and change data value to adjust voltage to be 13.5 ± 0.1V.
6. Connect a digital voltmeter to test point "TP12V2" (+) and chassis ground (–). Select
item no. "92" and change data value to adjust voltage to be 13.5 ± 0.1V.
7. Select item no. "5" and set data value to "0".

2.3 Clamp Adjustment [PC]

1. Receive the 16-step grey scale computer signal with Computer2 [RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "TPG1" (+) and chassis ground (–).
4. Select group no. "0", item no. "0" and change data value to adjust the pedestal level
and black level to be the same level.
5. Connect an oscilloscope to test point "TPR1" (+) and chassis ground (–).
6. Select item no. "1" and change data value to adjust the pedestal level and black level
to be the same level.
7. Connect an oscilloscope to test point "TPB1" (+) and chassis ground (–).
8. Select item no. "2" and change data value to adjust the pedestal level and black level
to be the same level.
Fig. 3-3
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