Sharp VT-3418X - Page 42

n Test points layout of VCR Main Unit.
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Figure 2-2.
Adjustment of PAL System SP / LP ~10~
Adjustment of NTSC System SP / EP slow
tracking Preset
tracking Preset
Measuring
instrument
Monitor TV
Mode
Recording and playback on self-
recording tape at SP and LP mode.
Measuring
instrument
Mode
Monitor TV
Recording and playback on self-
recording tape at SP and EP mode.
Input signal
PAL System
Commercial broadcastor video signal.
Input signal
NTSC system
Commercial broadcast or video signal.
Test point
Monitor screen
Adjusting point
Tracking control button (+ ), (- )
Specification
No noise bar on the monitor TV screen.
1. Play back the SP self-recorded tape in the PAL
System slow mode.
Test point
Adjusting point
Specification
Monitor screen
Tracking control buttons (+), (-)
No noise bar on the monitor TV screen.
1. Play back the SP self-recorded tape in the NTSC
System slow mode.
2. Make the test points TP8201 and TP8202 short-
circuited in the Jack PWB.
3. Be sure that the PB mode display (b) disappears
on the screen.
2. Make the test points TP8201 and TP8202 short-
circuited in the Jack PWB.
3. Be sure that the PB mode display (b) disappears
on the screen.
4. Remove the short-circuit.
5. Adjust the tracking control using the TRACKING
buttons on the remote controller so that there is
no noise on the screen.
6. Play back the LP self-recorded tape in the PAL
System Slow mode.
4. Remove the short-circuit.
5. Adjust the tracking control using the TRACKING
buttons on the remote controller so that there is
no noise on the screen.
6. Play back the EP self-recorded tape in the NTSC
System Slow mode.
7. Make the test points TP8201 and TP8202 short-
circuited in the Jack PWB.
8. Be sure that the PB mode display (b) disappears
on the screen.
7. Make the test points TP8201 and TP8202 short-
circuited in the Jack PWB.
8. Be sure that the PB mode display (b) disappears
on the screen.
9. Remove the short-circuit.
lO.Adjust the tracking control using the TRACKING
buttons on the remote controller so that there is
no noise on the screen.
9. Remove the short-circuit.
lo-Adjust the tracking control using the TRACKING
buttons on the remote controller so that there is
no noise on the screen.
42