DOWNLOAD Sony CMT-VP11 / HCD-VP11 Service Manual ↓ Size: 17.62 MB | Pages: 38 in PDF or view online for FREE

9

4

Motor board 

3

Two screws

2

Belt

1

Rotate the control cam in 

     the direction of arrow 

A

5

Pull the tray

A

1

Torsion spring

2

SW lever

4

Pulley

5

Gear

6

Gear

7

Roller

8

Cam

3

Spacer (55)

10

Start

REC pause for 3 seconds

FWD REC

Fast forward

REV Play

REC pause for 3 seconds

REV REC

Rewind

FWD Play

Shut off

Shut off

Shut off

Shut off

1 minute

3 minutes

1 minute

3 minutes

Start

Open the disc tray

Close the disc tray

Play the last track

Procedure:
1.

Set to standby state.

2.

Press three buttons of x (TAPE), x  (CD), and  MD/VIDEO
simultaneously.

3.

Liquid crystal display are all turned on.

4.

To exit from this mode, press the ?/1 button to turn the power
OFF.

This mode can be used for operation check of tape deck section.

Procedure:
1.

Set a tape in the tape deck.

2.

Set to standby state.

3.

Press three buttons of x (TAPE), x  (CD), and  TAPE
simultaneously.

4.

The aging is executed in bellow sequence.

5.

To exit from the aging mode, press the ?/1 button to turn the
power OFF.

This mode can be used for operation check of CD section.

Procedure:
1.

Load a CD disc.

2.

Set to standby state.

3.

Press three buttons of x (TAPE), x (CD), and  TUNER
simultaneously.

4.

The aging is executed in bellow sequence.

5.

To exit from the aging mode, press the ?/1 button to turn the
power OFF.

11

0 dB=0.775 V

Confirm each contents of this section first of all. If the results are
not satisfied, do the adjustment.

1.

Demagnetize the record/playback head with a head
demagnetizer.

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 otherwise
specified.

• Test Tape

Procedure:
1.

Mode:  Playback

set

MAIN board
LINE OUT jack (PJ301)
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

4.

Repeat step 1 to 3 in playback (REV) mode.

5.

After the adjustments, apply suitable locking compound to the
pats adjusted.

Procedure :
Mode : Playback

Adjust the tape speed adjustment control inside motor, so that the
frequency counter reading becomes 3,000 ±90 Hz.

W.RMS (JIS) less than 0.3%
(test tape : WS-48B)

MAIN
board
CN301
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
LINE OUT jack (PJ301)
L-CH

forward

reverse

Tape

Signal

Used for

P-4-A100

10 kHz, –10 dB

Azimuth Adjustment

WS-48B

3 kHz, 0 dB

Tape Speed Check

P-4-L300

315 Hz, 0 dB

Level Adjustment

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.

32 

Ω

test tape
WS-48B
(3kHz, 0dB)

set

digital frequency
counter

LINE OUT 

+

–

12

Adjust RV101 (L-CH) and RV201 (R-CH), so that adjustment within
the following adjustment level.

Adjustment level:
LINE OUT level: –7.7 

±

 0.5 dB (301.5 to 338.5 mV)

Level difference between the channels: within 

±

 0.5 dB

Confirm that the LINE OUT level does not change even though
play and stop are repeated.

Procedure:
Mode: FWD playback

Procedure:
1.

Record mode.

2.

Playback mode.

3.

Confirm playback the signal recorded in step 1 become
adjustment level as follows.

4.

If these levels do not adjustment level, adjust the RV103 (L-
CH) and RV203 (R-CH), on the MAIN board to repeat steps 1
to 3.
Adjustment level:
LINE OUT level: –23.8 dB 

±

 0.5 dB (47.2 to 53.0 mV)

Adjustment Location:  TC board

Procedure:
1.

Record mode.

2.

Playback mode.

3.

Confirm playback the signal recorded in step 1 become
adjustment level as follows.

4.

If these levels do not adjustment level, adjust the RV102 (L-
CH) and RV202 (R-CH), to repeat steps 1 to 3.
Adjustment level:
The  playback  outpout  of  10 kHz  level  difference  adjust
315 Hz reference should be 0 dB 

±

 0.5 dB.

test tape

P-4-L300

(3kHz, 0dB)

set

LINE OUT

frequency counter

AF OSC

LINE IN
1) 315 Hz
2) 10 kHz

blank tape
CS-123

set

attenuator

600 

Ω

} 50 mV (–23.8 dB)

recorded

position

set

LINE OUT

level meter

AF OSC

LINE IN
315Hz 50 mV (–23.8 dB)

blank tape
CS-123

set

attenuator

600 

Ω

recorded

position

set

LINE OUT

level meter

Record 
level

RV203

RV103

Record 
bias

RV102

RV202

Play back 
level

RV201

RV101