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17

FWD the tape A

“TAPE A AG-2”

Fast forward the tape A

“TAPE A AG-3”

RVS the tape A

“TAPE A AG-4”

Rewind the tape A

“TAPE A AG-5”

FWD the tape B

“TAPE B AG-2”

Rewind the tape A

“TAPE A AG-1”

Fast forward the tape B

“TAPE B AG-3”

RVS the tape B

“TAPE B AG-4”

Rewind the tape B

“TAPE B AG-5”

Shut off

2 minutes

Shut off or 20 seconds

2 minutes

Shut off

2 minutes

Shut off or 20 seconds

2 minutes

Shut off

2. Tape Deck Section
• The sequence during the aging mode is following as below.
• If an error occurred, stop display that step.

Note: “TAPE * AG- * ” is display of each step.

3. CD Section
• The sequence during the aging mode is following as below.
• If an error occurred, stop display that step.

DISC 1

chucking

TOC Read

Track 1 Play

Tray Tun

Tray Turn

DISC 4

Chucking

2 seconds

Last Track Play

TOC Read

Track 1 Play

Last Track play

[VACS ON/OFF]
• The volume control by VACS is turned ON/OFF.
Procedure:
1. Press the  \/1  button to turn the power ON.
2. Press the  PLAY MODE  and  \/1  buttons simultaneously.
3. The reaction display appears when switcing ON/OFF.

2 seconds

2 seconds

18

Mode

Torque Meter

Meter Reading

2.9~6.9 mN•m

FWD

(30 to 70 g•cm)

(0.42 – 0.97 oz•inch)

FWD

     CQ-102C

0.19~0.59 mN•m

back tension

 (2 to 6 g•cm)

(0.03 – 0.08 oz•inch)

7.8~16.7 mN•m

FF/REW

     CQ-201B

 (80 to 170 g•cm)

(1.11 – 2.36 oz • inch)

Precaution
1. Clean the following parts with a denatured alcohol-moistened

swab:

record/playback heads

pinch rollers

erase head

rubber belts

capstan

2. Demagnetize the record/playback head with a head demagne-

tizer.

3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the

parts adjusted.

5. The adjustments should be performed with the rated power sup-

ply voltage unless otherwise noted.

   DECK SECTION     0 dB = 0.775 V

Precaution
1. Demagnetize the record/playback head with a head demagne-

tizer.

2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the

parts adjust.

4. The adjustments should be performed with the rated power

supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in

this service manual. (As a general rule, playback circuit
adjustment should be completed before performing recording
circuit adjustment.)

6. The adjustments should be performed for both L-CH and R-CH.
7. Switches and controls should be set as follows unless other-

wise specified.

8. Set to the test mode.

(1) Press the  \/1  button to turn the power ON.
(2) Select the function “TAPE A or B”.
(3) Press the button of  x (TC-B)  ,  ENTER ,and  DISC 3

simultaneously, to set the tape deck test mode
and displays “TEST MODE” on the fluorescent indicator
tube.

(4) To release from the test mode, press the  \/1  button.

• Test Tape

Tape

Signal

Used for

P-4-A100

10 kHz, – 10 dB

Azimuth Adjustment

WS-48B

3kHz, 0dB

Tape Speed Adjustment

19

Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback (FWD)

set

MAIN board
MD (VIDEO) OUT jack (J701)
L-CH, R-CH

+

level meter

test tape
P-4-A100
(10 kHz, – 10 dB)

Screw
position

L-CH
peak

within
1dB

Output
level

L-CH
peak

R-CH
peak

within
1dB

Screw
position

R-CH
peak

3. Mode: Playback

set

test tape
P-4-A100
(10 kHz, – 10 dB)

R-CH

oscilloscope

L-CH

R-CH

V

H

waveform of oscilloscope

in phase 45

°

90

°

135

°

180

°

good

wrong

MAIN board
MD (VIDEO) OUT jack (J701)
L-CH

4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the

pats adjusted.

Adjustment Location: Playback Head (Deck A).

 Record/Playback/Erase Head (Deck B).

forward

reverse

2. Turn the adjustment screw and check output peaks. If the peaks

do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.

Tape Speed Adjustment
   DECK B
Procedure:
Mode: Playback

set

MAIN board
MD (VIDEO) OUT jack (J701)
L-CH, R-CH

+
–

frequency counter

test tape
P-4-A100
(10 kHz, – 10 dB)

1. Insert the WS-48B into the deck B.
2. Press the   H  button on the deck B.
3. Adjust the tape speed adjustment control inside motor so that

frequency counter reads 3,000 

± 90Hz.

Sample value of wow and flutter W.RMS (JIS) less than 0.3%
WS-48B

Tape speed adjustment
control inside motor

20

Note :
1. CD Block is basically designed to operate without adjustment.

Therefore, check each item in order given.

2. Use LUV-P01 (4-999-032-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M

Ω impedance.

4. Clean the object lens by an applicator with neutral detergent

when the signal level is low than specified value with the
following checks.

BD board

Oscilloscope

TP(FE)
TP(DVC)

Procedure :
1. Connect oscilloscope to TP (FE).
2. Connect between TP (FE) and TP (DVC (   1.65 V)) by lead

wire.

3. Press the  \/1  button to turn the power ON.
4. Load a disc (LUV-P01) and actuate the focus search. (In conse-

quence of open and close the disc tray, actuate the focus search)

5. Confirm that the oscilloscope waveform (S-curve) is symmetri-

cal between A and B. And confirm peak to peak level within 2
±0.5 Vp-p.

symmetry

S-curve waveform

within 2 

±

0.5Vp-p

A

B

6. After check, remove the lead wire connected in step 2.
Note : • Try to measure several times to make sure than the ratio

  of A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
  brightness to obtain best waveform.

Procedure :
1. Connect oscilloscope to TP (RFDC) and TP (RFAC).
2. Press the  \/1  button to turn the power ON.
3. Load a disc (LUV-P01) and playback.
4. Confirm that oscilloscope waveform is clear and check RF

signal level is correct or not.

Note: Clear RF signal waveform means that the shape “◊” can be

       clearly distinguished at the center of the waveform.

VOLT/DIV : 200mV
TIME/DIV : 500ns

level : 1.45 

±

 0.3Vp-p

TP(TE)
TP(DVC)

BD board

oscilloscope

Procedure:
1. Connect oscilloscope to TP (TE) and TP (DVC) board.
2. Press the  \/1  button to turn the power ON.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Press the  bB  button. (Becomes the 1track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscillo-

scope waveform.

B=1.3 

±

 0.6Vp-p

symmetry

A (DC voltage)

center of
waveform

B

0V

Specified level:     

× 100=less than – 22%

B

A

DVC

RFDC

RFAC

TE

FE

SE

DVC

TP(RFDC)
TP(RFAC)

BD board

oscilloscope