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VP-1 PWB Assembly

TP183
(SW-P)

TP182
(ENV.)

• Self-recording means “Record any broadcasting or video

signal and play back the just-recorded portion.”

 TP101

  Oscilloscope

PLAY mode

 (VIDEO OUT)

Alignment tape

 TP183 (SW-P)

(MH-2)

VR351 (SW-P)

6.5 H 

±

 0.5 H

T = 6.5H 

±

 0.5H

0.5H

1H

Rise

RF. SW. PULSE

Front edge of
vertical sync signal

1. After ejecting the cassette tape, load the alignment

tape.

2. Within two seconds after the playback screen is

displayed. press the remote control tracking buttons (

4

)

once, and cheak that the ATR display goes off.

3. Press the remote control tracking buttons (

$

) once and

set the tracking to the center.

Do not press the tracking buttons (

4

) and (

$

)

continuosly.

4. At first, turn the VR351 fully counterclockwise to make

system microcomputer adjusting mode.

5. Adjust VR351 (SW-P) so that the width of “ T ” be-

comes 6.5 H 

±

 0.5 H as shown in Fig. 2-1-3.

Color Bar Signal Generator

PAL Color bar signal with 100% white level (EBU color bar signal)

Oscilloscope

Vertical sensitivity

: 5 mV/DIV, external trigger

Bandwidth

: more than 10 MHz

Oscilloscope Probe

Input capacity

: less than 25 pF (10:1)
  less than 40 pF (1:1)

Covering frequency

: DC ~ 40 MHz (10:1)
  DC ~30 MHz (1:1)

Digital Voltmeter

DC range

Alignment Tape

MH-2 (H-7099-052-H)

: SP mode, color bar. 1 kHz

(Color bar signal waveform is described below. Refer to Fig. 2-2-1)

Relay Jig

J-6090-036-A

: 7-wire flat cable for VP-1 PWB assembly (SLV-L44AR)

J-6090-019-A

: 12-wire flat cable for VP-1 PWB assembly (SLV-L66HFAR)

Connect the flat cable end from the cylinder assembly to
the VP-1 PWB assembly using the relay jig to provide
simple repairing of the VP-1 PWB assembly, as shown in
Fig. 2-2-3. Further, when adjusting the VP-1 PWB assem-
bly, be sure to make contact an end of shield case with
bracket of the VP-1 PWB assembly to maintain the shield
effect. If the VP-1 PWB assembly does not contact, there
is insufficient ground and no proper play back image can
be obtained.

Color bar signal waveform (MH-2)

Color bar pattern (MH-2) on monitor TV

VP-1 PWB Assembly

Flat Cable

Bracket

Cylinder
Assembly

VP-1 PWB Assembly

Flat Cable

Cylinder
Assembly

• If adjusting the MTS Decoder Circuit, special equipment

shown in section 2-3-1. is necessary.

• Improper adjustment will cause loss of performance of

stereo sound and bilingual sound detection.

• Prior to making these adjustments, the other adjustments

except the MTS Decoder should be completed.

TV Multichannel Sound Generator

LMS-238 (Prodused by Leader Electonics Corp.)

Oscilloscope

Standard Audio Signal Generator (SG)

Frequency Counter

Input frequency

: 20 Hz ~ 10MHz

AC Voltmeter

DC Voltmeter

DC Power Supply Unit

Voltage

: 0 ~ 15 V (DC)

Band Path Filter

200 Hz ~ 15 kHz

CP-1 PWB (Foil side)

VR351

VR631

TP633

VR634

VR632

VR635

VR633

TP631

TP635

TP101

 CH : 1

TV multichannel

E-E mode

 AUDIO OUTPUT    sound generator
   terminal (L)

Oscilloscpe

 CH : 2

Band path filter

 AUDIO OUTPUT  (200 Hz ~ 15kHz)
   terminal (R)

VR632 (SEP. LOW)

Minimum level (less than

VR634 (SEP. HIGHT)

15mVp-p)

• Set the INPUT switch on the remote control to TUNER.
• Set the VIF/RF OUTPUT switch on the TV Multichannel

Sound Generator to CH-3 or CH-4. And LEVEL volume
control to push (locked the RF output level).

 TP633

Standard audio

Disconnected

signal generator (SG)

Power cord of

Oscilloscope

VCR

Frequency counter
DC power supply unit

 VR633 (ST.DBX FIL)

Minimum level (Less than 10 mVp-p)

1. Temporary disconnect the power cord of the VCR to set

the power OFF.

2. Apply 5V(DC) to TP630 from the DC power supply unit.
3. Connect the standard audio signal generator and

frequency counter to TP631, and input 22.9 kHz 

±

 50

Hz, -10 

±

 1 dBM sine wave.

4. After confirming TP633 output on the oscilloscope,

adjust VR633 (ST. DBX FIL) so that the output is
brought to its minimum level (less than 10 mVp-p).

 TP635

TV multichannel

E-E mode

   sound generator
DC voltmeter

 VR633 (VCO)

–

1. Input the output signal of the TV multichannel sound

generator into the VCR ANT input terminal.

2. Set the TV multichannel sound generator as follows.

   SAP switch : OFF, INT FREQ switch : 300 Hz,
   STEREO switch : L + R, VIF/RF OUTPUT : CH-3 or CH-4.

3. Receive the signal of TV multichannel sound generator.

and confirm so that the “ L + R ” within the monitor TV

when PILOT switch to ON.

4. Set OFF the pilot switch of the TV multichannel sound

generator, then measure the DC output voltage of
TP635 and write the value down.

5. Set ON the pilot switch and confirm that “ ST ” within

the indicator panel lights. If not, adjust VR635 (VCO)
until “ ST ” lights.

6. Measure the output voltage of TP635, and adjust

VR635 (VCO) so that the output voltage agree with the
value (within 

±

 0.03 V) measured in step 3.

1. Input the output signal of the TV multichannel sound

generator into the VCR ANT input terminal.

2. Set the TV multichannel sound generator as follows.

SAP switch : OFF, EXT (MONO) switch : ON.

3. Input 300 

±

 50 Hz sine wave into the EXT INPUT terminal

of the TV multichannel sound generator from the standard
audio signal generator.

4. Connect the AC voltmeter to the EXT INPUT terminal, and

adjust the output level of the standard audio signal
generator so that the input voltage becomes 343.7 

±

 1

mVrms (terminated at 600

Ω

).

5. Adjust the VR631 (INPUT LEVEL) so that the AC voltme-

ter connected to TP631 becomes 100 

±

 5mVrms.

 TP631

TV multichannel

E-E mode

   sound generator
Standard audio
   signal generator
AC voltmeter

 VR631 (INPUT LEVEL)

100 

±

 5 mVrms

1. Input the output signal of the TV multichannel sound

generator into the VCR ANT input terminal.

2. Connect the oscilloscope to the AUDIO OUTPUT terminal

(L) and (R) of the VCR via the BPF.

3. Set the TV multichannel sound generator as follows.

     SAP switch : OFF, PILOT switch : ON.

4. Receive the signal of TV multichannel sound generator,

and confirm so that the “ L + R ” within the monitor TV
when PILOT switch to ON.

5. Set the TV multichannel sound generator (STEREO switch :

Rch, INT FREQ switch : 3 kHz), and adjust VR632 (SEP.
LOW) so that the output of the AUDIO OUTPUT terminal
(L) is brought to its minimum level (less than 15 mVp-p)
during Rch modulation.

6. Set the TV multichannel sound generator (STEREO switch :

Rch, INT FREQ switch : 300 Hz), and adjust VR634 (SEP.
HIGH) so that the output of the AUDIO OUTPUT terminal
(R) is brought to its minimum level (less than 15 mVp-p)
during Lch modulation.