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vc-M29GWM49GM
VC-M26SWM46SM
vc-M261SM/M461SM
SERVO
CIRCUIT
ADJUSTMENT
OF HEAD SWITCHING POINT
Measuring
Dual-trace oscilloscope
instrument
Colour TV monitor
Mode
Playback
Cassette
Alignment tape (VROCPSV)
Test point
TP2202 (H.SW.P.) to CH-I , VIDEO
OUT jack to CH-2
(CH-I trigger slope switch at (+),
Internal trigger at CH-I side.)
Specification
6.5 ± o.5H (lines)
1. Removethe front paneland play thealignmenttape.
(VROCPSV)
(Playbackpicture on the monitorscreen.)
2. Make fora moment short-circuit between TP5001 and
TP5002, both located at the front side on the main
Besure that all the fluorescentdisplaytubes light up
into the TEST
mode.
(See Note below)
3. Press
the PLAY
button.
Besure the "PLAY"appearsinthe fluorescent d isplay
tubes flashing (about IHz) into the auto PGadjust-
ment operating.
Note:
When the manual PG adjustment, observe the wave-
formwithan oscilloscope andmakeadjustment F For
REW button so that the specification.
4. Stopthe "PLAY" appears in the flashingof fluorescent
display tubes at adjusted.
5. Press the STOP button in the return to normal mode.
6. Makethis checkingof waveformon the oscilloscope
screen be as shown in Figure 5-2. just after the head
switching point have been adjusted.
Note:
O Set-up of TEST mode.
When the adjustment of HEAD SWITCHING POINT,
AUTO
TRACKING
function
@Whenthecassettehousing control a ss'yis removed,
set-up of mechanism operating mode.
1) Replug the AC power cord it a few minutes later.
2) Make a short-circuitbetweenTP5005and 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) Youcan mechanismoperatigmode,Replugthe AC
power cord a few minutes later.
ADJUSTMENT
is invalid.
CH-2
VIDEO
ou-r
CH-I
HEAD
SWITCHING
PULSE
ADJUSTMENT OF SPILP SLOW TRACKING
PRESET
Measuring
instrument
Mode
Self-recorded tape
Control
Trackingcontrolbuttons(+) or (—)
Specification
Minimized
1.
Have the unit to receivea good TV broadcast or feed
a video signalto the VIDEO IN jack. (See note @
below)
2. Set thetape speedin SP modeby usingthe remote
control and record the signal on tape.
3.
Rewindand playthe tape where signalwas 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.
Besurethatallthefluorescent displaytubeslightup
into the TEST
mode.
Lookatthe monitorscreenandadjust t he (+) or (—)
6.
TRACKING buttons sothatthethereis noisedisap-
pears from the screen.
Press the STOP button to return to normat mode.
7.
8.
Playthe tape a few secondsthen pressthe SLOW
button again and make sure there is no noise in the
screen.
(FortheLPmodeputadjustment atthesameadjust-
ment way as SP mpde.)
Notes:
O Self-recorded
tapemeans a cassette w hose program
was recorded by the unit being adjusted.
@The TVprogram willnotberecorded i f RCA or21pin
plugsareplugedinto the AUDIONIDEOinputtermi-
nals.
10
CH-I: IV/div 50ps/div
CH-2:2V/div50ps/div
± 0.5H(lines)
Figure 5-2.
Colour TV monitor
Playback
(SP/LP mode) (See Note below)
noise on
monitor
screen
V-sync.
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