DAEWOO ELECTRONICS DV-F202 Series, Руководство по обслуживанию

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6
2-2. VIDEO CIRCUIT ADJUSTMENT MENT METHOD
1. EE LEVEL
• Connection Method
• Adjustment Procedure
1) Set the TV/LINE to LINE mode.
2) Supply the Color bar signal with 100% white to the VIDEO IN TERMINAL.
3) Set the VCR to the STOP mode.
4) Connect the oscilloscope to TJ395 and trigger the scope externally with the composite synchronous signal from TJ313
5) Adjust R395 to obtain 0.5 ± 0.02Vp-p between the SYNC TIP and 100% white level.
Adj. Location Checking Point Measuring Equipment Mode Test Tape
R395
TJ313
Signal Gen, Oscilloscope –
Color Bar With 100%
TJ395 White
TJ395
R395
TJ313
TOP VIEW
IC301
0.5
+
_ 0.02Vpp
CH-1
OSCILLOSCOPE
CH-2
SIGNAL
GENERATOR
0.5±0.02Vp-p
TJ 395
Horizontal: 10µs/div
vertical : 0.1v/div
2-1. SERVO CIRCUIT ADJUSTMENT METHOD
1. PLAYBACK PHASE
• Connection Method
• Adjustment Procedure
1) Play back the test tape.(DP-2)
2) Set the oscilloscope to the CHOP mode. Connect CH1 to the SW PULSE (PT01 PIN
3
), and CH2 to the VIDEO OUT
(TJ396) and trigger the scope with signal form CH1
3) Adjust R591 to the positive rising edge of SW PULSE at 6.5H ± 0.5H from the V-SYNC
SECTION 2.
ELECTRICAL ADJUSTMENT
Adj. Location Checking Point Measuring Equipment Mode Test Tape
TJ396
DP-2
R591
PT01 PIN
3
Oscilloscope Play
Modulator
TJ396
CH-1
OSCILLOSCOPE
CH-2
R591
PT01
TOP VIEW
6.5H 0.5H
+
_
5
Horizontal: 50µs/div
Vertical: 0.5V/div
6.5±0.5H