Canon LV-7105 Service Manual - Page 69
PC/AV-Video Adjustment-2, 12 S/H Clock Adjustment, COMPUTER, VIDEO
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Part 3: Adjustment 2.11 PC/AV-Video Adjustment-2 [PC-video adjustment-2] 1. Receive the 16-step gray scale computer signal. 2. Set to COMPUTER mode. 3. Connect an oscilloscope to test point "TP503G" (+) and chassis ground (-). 4. Enter to the service mode, select item no. "15" and change data value to adjust "b" to be 1.70 ±0.01Vp-p. [AV-video adjustment-2] 5. Receive the 16-step gray scale video signal. 6. Set to VIDEO mode. 7. Connect an oscilloscope to test point "TP503G" (+) and chassis ground (-). 8. Enter to the service mode, select item no. "15" and change data value to adjust "b" to be 1.85 ±0.01Vp-p. white level (b) white level (a) black level Fig. 3-9 2.12 S/H Clock Adjustment 1. Receive the 16-step gray scale computer signal. 2. Set to COMPUTER mode. 3. Connect an oscilloscope to test point "TP503G" (+) and chassis ground (-). 4. Enter to the service mode, select item no. "3" and change data value to adjust "a" to be maximum. (a) Fig. 3-10 3-13