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SERVO CIRCUIT ADJUSTMENT
Measuring
Dual-trace oscilloscope
instrument
Colour TV monitor
Alignment tape (VROCPSV)
Test point
TP302 (H.SW.P.) to CH-1, VIDEO
OUT jacktoCH-2..s
. .
:
(CH-1 trigger slope switch at (+),
Internal trigger at CH-1 side.)
6.5 +0.5H (lines)
1. Remove the front pane! and play the alignment tape.
(VROCPSV)
(Playback picture on the monitor screen.)
2. Make fora moment short-circuit between TP5001 and
TP5002, both located at the front side on the main
PWB.
Be sure that all the fluorescent display tubes light up
into the TEST mode.
_.(See Note below)
3. Press the PLAY button.
- Besure the "PLAY" appears in the fluorescent display
— tubes flashing (about 1Hz) into the auto PG adjust-
_ ment operating.
' Note:
When the manual PG adjustment, observe the wave-
form with an oscilloscope and make adjustment FF or
REW button so that the specification.
4, Stop the "PLAY" appears in the flashing of fluorescent
' display tubes at adjusted.
5. Press the STOP button in the return to normal mode.
6. Make this checking of waveform on the oscilloscope
' screen be as shown in Figure 5-2. just after the head
' gwitching point have been adjusted.
Note:
@ Set-up of TEST mode.
|
|
- When the adjustment of HEAD SWITCHING POINT,
AUTO TRACKING function is invalid.
2) Make a short-circuit between TP5005 and TP5006,
both located at the front side on the main PWB with a
22 ohm resistor, to center the tracking.
3) AC power cord is plugged in.
4) You can mechanism operatig mode, Replug the AC
power cord a few minutes later.
ADJUSTMENT
OF HEAD SWITCHING POINT —
32
% Cassette
1. Have the unit to receive a good TV broadcast or feed
CH-+1: 1V/div 50ysidiv
CH-2: 2V/div 50us/div
CH-2
VIDEO OUT
CH-1
HEAD
SWITCHING
|
PULSE
|
Figure 5-2.
ADJUSTMENT OF SLOW TRACKING PRE-
SET (VC-M23SM/M231SM)
_
Self-recorded
tape
| {See Note below)
Tracking control buttons (+) or (-)
Minimized noise on
monitor screen
6.5
+ 0.5H (lines) —___
>! V-sync.
Specification
a video signal to the VIDEO IN jack. (See note @
below)
2. Record the signal on tape.
3. Rewind and play the tape where signal was recorded
in above step.
4. Press the SLOW button on the remote control, and
playback the recorded portion in the slow mode.
5. Make for a moment short-ciucuit between TP5001
and TP5002, both located at the front side on the main
PWB.
Be sure that all the fluorescent display tubes light up
into the TEST mode.
3
6. Look at the monitor screen and adjust the (+) or (-)
TRACKING buttons so that the there is noise disap-
pears from the screen.
7. Press the STOP button to return to normal mode.
8. Play the tape a few seconds then press the SLOW
button again and make sure there is on noise in the
screen.
Notes:
@ Self-recorded tape means a cassette whose program
was recorded by the unit being adjusted.
4
@® The TV program will not be recorded if RCA or 21pin
plugs are pluged in to the AUDIO/VIDEO input termi-
nals.

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Vc-m231smVc-m43smVc-m431sm

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