DOWNLOAD Sony CX-LEM220 Service Manual ↓ Size: 2.87 MB | Pages: 43 in PDF or view online for FREE

9

1

three screws
(BTP2.6 

×

 8)

3

wire (flat type) (17core)
(CN201)

2

CD cover

6

two screws

7

two washers

4

two screws

5

two washers

8

base unit
(BU-K7BD80B)

2

four screws
(BVTP3 

×

 10)

3

two harness

4

plate (shield cassette)

5

mechanical deck (CMAL5Z220A)

1

wire (flat type) (7 core)

10

4

screw
(BVTP3 

×

 10)

8

MAIN board

7

tuner (FM/AM)

1

connector (CN307)

2

connector (CN308)

3

connector (CN903)

5

6

Remove the solder.

3

two screws
(BVTP3 

×

 14)

2

connector
(CN308)

4

AMP board

1

connector
(CN307)

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 customer.

1. Press the ?/1 button to turn the power on.
2. While pressing the x button, press the ?/1 button and turn

the [VOLUME] knob in the counter-clock wise.

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

•

All segments of liquid crystal display are tested, and the version
and released date of the micro computer are displayed.

1. Press the ?/1 button to turn the power on.
2. While pressing the [DISPLAY] button, press the ?/1 button

and turn the [VOLUME] knob in the counter-clock wise.
Then all segments of liquid crystal display are turned on.

3. Press the [i-BASS] button, the version and released date of the

micro computer are displayed.

0407  V100

4. Press the [BASS/TREBLE]  button, the model name and

distination are displayed.

AM01  CE2

5. To exit from this mode, perform the “COLD RESET”.

•

When this mode is entered, optical pick-up error code is
displayed with the 8-character format on the liquid crystal
display.

1. Press the ?/1 button to turn the power ON.
2. Press the CD NX button to select “CD”.
3. While pressing the [DISPLAY] button, press the [PLAY/MODE/

TUNING MODE] and turn the [VOLUME] knob in the counter-
clockwise.

4. When this mode is activated, CD error code is displayed on

the liquid crystal display.

5. Press the [TUNING +              ] and [TUNING -               ]

buttons, error history No. is changed.

The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. “D” is displayed on the liquid crystal display.

The second digit from the left indicates:
(Error history No. display)
The second digit from the left indicates which order the error history
is. “0” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.

Version of micro computer
(In this case, version 100)

released date of micro computer
(In this case, released of April 07)

distination
(In this case, UK model)

model name
(In this case, CX-LEM220)

The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.

0 1

Not focused (TOC read without a disc)

0 2

GFS NG (TOC read with a disc chucked)

0 3

Start operation time-over

0 4

Defocused continuously (Defocused during TOC

reading)

0 5

Q code not entered for specified time

0 6

Tracking not turned ON

0 7

Blank disc (Blank disc TOC read)

The 5th and 6th digit from the left indicates:
(Error step display)
The 5th and 6th digit from the left indicates which processing when
a trouble occurred

0 1

SHIP in progress

0 2

Power OFF in progress

0 3

Power ON in progress

0 4

Initialize in progress

0 5

Oscillation stopping

0 6

From oscillation stop, oscillation starting

0 7

Stopping

0 8

Stop operation is under way

0 9

Start operation in progress

0 A

TOC read in progress

0 B

Search operation is under way

0 C

Playback operation is under way

0 D

Pause operation is under way

0 E

Playback manual search operation is under way

0 F

Pause manual search operation is under way

The 7th and 8th digit from the left indicates:
The 7th and 8th digit from the left indicates which operation in
progress when a trouble occurred. (Step of each processing of the
5th and 6th digits is indicated)

•

Number of repeat for CD playback is 5 times when the repeat
mode is “REPEAT”. This mode is used to enables CD to repeat
playback for limitless times.

1. Press the ?/1 button to turn the power ON.
2. Press the CD NX button to select “CD”.
3. While pressing the x button, press the [PLAY MODE/TUNING

MODE] and turn the [VOLUME] knob in the counter-clockwise.

4. The message “NO LIMIT” is displayed on the liquid crystal

display momentarily, CD repeat 5 limit is cancelled.

.m

M>

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)