Canon LV-7105 Service Manual - Page 67
Signal Center Adjustment, 9 PC/AV Gamma Off Adjustment
![]() |
View all Canon LV-7105 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 67 highlights
Part 3: Adjustment 2.8 Signal Center Adjustment 1. Receive the 16-step gray scale computer signal. 2. Set to COMPUTER mode. [R-signal cneter adjustment] 3. Connect a digital voltmeter to test point "TP501R" (+) and chassis ground (-). 4. Adjust voltage to be 7.30 ±0.05V by using VR503. [G-signal cneter adjustment] 5. Connect a digital voltmeter to test point "TP503G" (+) and chassis ground (-). 6. Adjust voltage to be 7.30 ±0.05V by using VR533. [B-signal cneter adjustment] 7. Connect a digital voltmeter to test point "TP505B" (+) and chassis ground (-). 8. Adjust voltage to be 7.30 ±0.05V by using VR563. 2.9 PC/AV Gamma Off Adjustment [PC-gamma off 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. "0" and change data value to adjust "a" to be 1.40 ±0.01Vp-p. [AV-gamma off adjustment] 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. "0" and change data value to adjust "a" to be 1.40 ±0.01Vp-p. (a) Fig. 3-7 Note: * This adjustment should be carried out before adjusting PC/AV-Video Adjustment-1 and 2. 3-11
![](/manual_guide/products/canon-lv7105-service-manual-b5e1e53/67.png)