Electrical Adjustments; Fan Voltage Adjustment; Nrs Adjustment; Signal Center Dc Voltage Adjustment - Canon LV-S1U Service Manual

2. ELECTRICAL ADJUSTMENTS

2.1 Fan Voltage Adjustment

Measuring equipment ............Digital voltmeter
Test point ..............................TP66A - ground
Enter the service mode.
1. Set adjustment item to "50". Set data value to "1". (Fan voltage minimum)
2. Set adjustment item to "67". Set data value to "1".
3. Adjust TP66A voltage to 8.4 V ± 0.1 V DC using VR5601.
4. Set adjustment item to "50". Set data value to "0". (Fan voltage maximum)
5. Set adjustment item to "67". Set data value to "1".

2.2 NRS Adjustment

Measuring equipment ............Oscilloscope
Test point ..............................TP-NRS1
Input mode ...........................Computer
Input signal ...........................16-step gray scale
Enter the service mode.
Adjust the waveform voltage at each point to the following value with the VOLUME +/- button.
Adjustment item
22
23

2.3 Signal Center DC Voltage Adjustment

Measuring equipment ............Digital voltmeter
Input mode ............................Computer
Input signal ...........................16-step gray scale
Enter the service mode.
Adjust the voltage at each test point to the following value with the VOLUME +/- button.
Item No. Test point
1
2
3
Adjustment value
Set part A of the waveform to 3.0 V ± 0.1 V
Set part B of the waveform to 12.0 V ± 0.5 V DC.
A
GND
Fig. 3-2
Adjustment value
TP-R1 7.3V ± 0.05V DC
TP-G1 7.3V ± 0.05V DC
TP-B1 7.3V ± 0.05V DC
3-5
Part 3: Adjustment
DC.1
B