SERVICE ADJUSTMENTS (Continued)
VIDEO LEVELSOUND ADJUSTMENT
1. Connect color-bar generator to antenna terminals.1. Connect a color-bar generator to the antenna terminals
2. Switch the generator to a white field (100 IRE).with audio signal of 1KHz at 100% modulation.
3. Set the picture controls to the Auto levels.2. Set the picture controls to the Auto levels.
4. Connect oscilloscope + lead to terminal TP16 and 3. Connect oscilloscope + lead to TP21 (pin 75 of IC101 or
� lead to ground.C132) and � lead to ground.
5. Turn off the receiver and disconnect the AC power cord4. Turn off the receiver and disconnect the AC power cord
(AC 120V line).(AC 120V line).
6. While pressing the Menu key, reconnect the AC power5. While pressing the Menu key, reconnect the AC power
cord. The Service Menu will now appear.cord. The Service Menu will now appear.
7. Select NO. 5F VL5FL (Video Level) with the or key.6. Select NO. 5F VL5FL (FM Level) with the or key.
8. Adjust the data with the 5, 6, and 7 number keys for an7. Adjust the data with the + or � key for an oscilloscope
oscilloscope reading of 1.0 ? 0.1 VP-P at TP16.reading of 0.95 ? 10% VP-P at TP21.
9 Press the MENU key to turn off the Service Menu display8. Press the MENU key to turn off the Service Menu display
and disconnect oscilloscope from chassis.and disconnect the oscilloscope from the chassis.
1.0 ? 0.1 VP-P 0.95 ? 10% VP-P
Figure 6.
Figure 7.
N 8 N |
ACEC
