13VT-N100
13VT-N150
13VT-CN10
ADJUSTMENT OF THE VCR ELECTRICAL CIRCUITRY
Notes:
? Before the adjustment:
Electrical adjustments described here are often required after replacement of electronic components and mechanical
parts such as video heads.
Check that the mechanism and all electric components are in good working condition prior to the adjustments,
otherwise adjustments can not be completed.
? Instruments required:
Dual-trace oscilloscope
Blank video cassette tape
Screwdriver for adjustment
Color bar generator
DC voltmeter
Alignment tape (VROATSV), (VRONBZGS)
? Adjustment of the VCR should be done in the TV/VCR combinated style. But there is a function to cut off the high
voltage of TV. Namely, you can check only VCR part by taking the wire lead RC off . Therefore you can use function
on the occasion of checking and adjusting VCR part.
CH-1CH-1:1V/div 50?sec/div
SERVO CIRCUIT ADJUSTMENT
VIDEO OUTCH-2:2V/div 50?sec/div
ADJUSTMENT OF HEAD SWITCHING
POINT
MeasuringDual-trace oscilloscope5.5?0.5H(Iines)V-sync.
CH-2
instrument
HEAD
ModePlaybackSWITCHING
PULSE
CassetteAlignment tape (VROATSV)
Figure 2-1.
Test pointTP2201 (Video Out) to CH1
Notes:
TP3302 (Trigger) to CH2
1 To make this adjustment, disable the AUTO TRACKING
ControlRemote Controlfunction.
? The AUTO TRACKING function is disable in the
Specification5.5 0.5H (lines)
following cases. (In the playback mode only.)
a When the CH " (TR ) button and the "0" button
1. Play the alignment tape.(VROATSV.)
of the remote control are pressed at the same time.
2. Press the CH " (TR ) button and the "0" button of
b When the AC cord is plugged in with making TP7701
remote control at the same time to turn the set into the
and TP7702 short circuited, after the cassette
adjustment mode for head switching point and to set
housing control ass'y is removed.
the tracking to center. (See Notes below) "T" is
(Mechanism operating mode)
displayed on the TV screen.
? The AUTO TRACKING function becomes available in
3. Press the PLAY button of remote control to make the
the following cases.
adjustment of head switching point, then the leading
a When the CH ' (TR ?) button and the CH" (TR
edge of the head switching pulse is automatically set
) button of the remote control are pressed at the
5.5H (lines) ahead of the vertical sync as shown Figure
2same time.
2-1 and the adjustment data is memorized in the EP-
b When the AC cord is plugged in with the cassette
ROM IC.
housing control ass'y put back.
4. Then press the stop button to stop the tape.
2 Pressing both the CH " (TR ) and the "0" button
transmits the test code. When the unit receives this
test code in the playback mode, the unit is turned into
the adjustment mode for the head switching point and
"T" is displayed at the position of CH number on the
screen. This function is available to the remote control
RRMCG1330PESA and RRMCG1330PESB.
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ACEC
