1112-2. Servo-Logic Circuit Adjustment Method; 1112-3. Video Circuit Adjustment Method - Daewoo DVR-1989D Service Manual

2-2. SERVO-LOGIC CIRCUIT ADJUSTMENT METHOD
1. VIDEO HEAD SWITCHING POSITION
Adj. Location
RV501
1) Play back the test tape.
2) Set the oscilloscope in the CHOP mode connect the CH1 to SW pulse PT01 2 PIN the CH2 to TP396 with CH1 triggering.
3) Adjust RV501 for the positive trigger until 6.5H¡ 0.5H cycles before the vertical SYNC pulse.
2-3. VIDEO CIRCUIT ADJUSTMENT METHOD
1. E E VIDEO LEVEL
Adj. Location
RV395
1) Feed the color bar signal to the line input terminal. And set for the stop (EE) mode.
2) Connect the oscilloscope to TP395 and trigger the scope with a composite SYNC signal at TP313 .(COMP .SYNC.)
3) Adjust the oscilloscope so that it can display a waveform of approx. 2H.
4) Adjust RV395 to obtain 0.5¡ 0.02 Vp-p between SYNC TIP and 100% white level.
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Checking Point Measuring Equipment
PT01 3 PIN
TP396
Checking Point Measuring Equipment
TP395
6
Mode
Oscilloscope Play
Mode
Oscilloscope EE
0.5¡ 0.02Vp-p
Test Tape
DP-1
Test Tape
ƒ¡