DOWNLOAD Sony CX-LDB10 / CX-LDB20 / XR-DB10 / XR-DB20 Service Manual ↓ Size: 4.56 MB | Pages: 51 in PDF or view online for FREE

9

2

four screws
(BVTP3 

× 

8) 

3

coating clip

4

two earth wires

1

 wire (flat type)

     (7core)

5

 plate (shield cassette)

   

6

 mechanical deck (CMAL5Z220A)

8

CONTROL board

2

three screws
(BVTP2.6 

× 

8)

3

seven screws
(BVTP2.6 

× 

8) 

1

knob (VOL)

4

 wire (flat type)

     (17core) (CN401)

5

 wire (flat type)

     (23core) (CN403)

6

 wire (flat type)

     (7core) (CN404)

7

 wire (flat type)

     (11core) (CN402)

10

2

screw
(BVTP3 

× 

8)

3

two sumitite screws
(B3)

5

two tapping screws (B3) 

9

four screws

7

two claws

8

holder (pwb PT)

6

shield cover

4

MAIN board

1

connector 

     (13P)(CN902)

q;

power transformer

1

Open the lid cassette.

3

lid cassette

claw

two hooks 

2

2

11

•

The cold reset clears all data including preset data stored in
the RAM to initial conditions. Execute this mode when
returning the set to the customers.

1. Press the  ?/1  button to turn the set ON.
2. Press three buttons x ,  ?/1  and [VOLUME] down simulta-

neously.

3. The message “RESET” is displayed and the set is reset.

•

A step of AM channels can be changed over between 9 kHz
and 10 kHz.

1. Press the  ?/1  button to turn the set ON.
2. Select the function “TUNER”, and press [TUNER/BAND]

button to select the BAND “AM”.

3. Press the  ?/1  button to turn the set OFF.
4. Press the  >  and  ?/1  buttons simultaneously, and thus

the channel step is changed over.

1. Press the  ?/1  button to turn the set ON.
2. Press the  CD u button to select “CD”
3. Remove the disc.
4. The message “NO DISC” is displayed.
5. Press three buttons  x  , CD u  and  [VOLUME] down si-

multaneously.

6. The message “SHIP RESET” is displayed and the set is reset.

The CD function is activated.

7. To exit from this mode, press the  ?/1  button and pull out the

AC plug.

•

This mode is used to check the software version, LCD, LED
and keyboard.

1. Press the  ?/1  button to turn the set ON.
2. Press the  CD u button to select “CD”
3. Press three bottons  [DISPLAY] ,  ?/1  and  [VOLUME]  down

simultaneously.

4. When the panel test mode is activated, all segments are turned

on.

•

This mode is used check the model, destination, software
version.

1. When the panel test mode is activated, press the button

[BASS/TREBLE], the model and destination are displayed.

1. When the panel test mode is activated, press the  H button,

to select the key test mode.

2. To enter the KEY test mode, the fluorescent indicator displays

“K0 VO”. Each time a button is pressed, “KEY” value
increases. However, once a button is pressed, it is no longer
taken into account. When all keys are pressed correctly, “K15
VO” is displayed.

3. To exit from this mode, pull out the AC plug.

1. Press the  ?/1  button to turn the set ON.
2. Set the function to “CD”.
3. Press three buttons  x ,  H , and [VOLUME] down simulta-

neously.

4. The repeat all mark blinks and then repeat 5 times limit is

released.

12

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

swab:

record/playback heads pinch rollers
erase head

rubber belts

capstan

idlers

2. Demagnetize the record/playback head with a head

demagnetizer.

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

supply voltage unless otherwise noted.

2.94 mN • m to 7.84 mN • m

FWD

CQ-102C

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.14 mN • m to 0.59 mN • m

FWD

CQ-102C

2 to 6 g • cm

back tension

(0.02 – 0.08 oz • inch)

6.86 mN • m to 17.64 mN • m

FF/REW

CQ-201B

71 to 143 g • cm

(0.98 – 1.99 oz • inch)

more than 0.98 N • m

FWD tension

CQ-403A

100 g or more

(3.53 oz or more)

DECK SECTION       0 dB = 0.775 V

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.

P-4-A100

10 kHz, –10 dB

Azimuth Adjustment

WS-48B

3 kHz, 0 dB

Tape Speed Check

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.

Screw
position

L-CH
peak

within
1dB

Output
level

L-CH
peak

R-CH
peak

within
1dB

Screw
position

R-CH
peak

1. Mode: Playback

set

MAIN board
SPEAKER terminal (J302)
L-CH, R-CH

+
–

level meter

test tape
P-4-A100
(10 kHz, – 10 dB)