ICF-CD2000, ICF-CD2000S - Sony Audio Service Manual (repair manual)

US Model

Canadian Model

E Model

Tourist Model

ICF-CD2000

AEP Model

UK Model

ICF-CD2000S

Photo: ICF-CD2000 (US model)

Model Name Using Similar Mechanism

D-E551

Optical Device Name

CDM-2911EBA

Optical Pick-Up Name

DAX-11E

2005B05-1
© 2005.02

– 2 –

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3

...................................................................

5

.........................................................

8

...................................................... 11

.............................................................. 12

......................... 15

7-1. IC Pin Function Description ........................................... 21
7-2. Block Diagram  – CD Section – ..................................... 23
7-3. Block Diagram – Main Section – ................................... 27
7-4. Printed Wiring Boards  – MAIN/JACK Boards – .......... 31
7-5. Schematic Diagram  – MAIN/JACK Boards – .............. 35
7-6. Printed Wiring Boards  – LCD/KEY Boards – .............. 40
7-7. Schematic Diagram  – LCD/KEY Boards – ................... 45

................................................ 53

............................... 57

• Keep the temperature of the soldering iron around 270 ˚C dur-

ing repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

or unsoldering.

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

0

0

0

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.

This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.

Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.

This model is used two ceramic filters of CF1 and CF3.
You must use same type of color marked ceramic filters in order
to meet same specifications.
Therefore, the ceramic filter must be changed two pieces together
since it’s supply two pieces in one package as a spare parts.

– 3 –

The laser diode in the optical pick-up block may suffer electro-
static breakdown because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

Please be sure to check thoroughly the parameters as par the “Op-
tical Pick-Up Block Checking Procedures” (Part No.: 9-960-027-
11) issued separately before replacing the optical pick-up block.
Note and specifications required to check are given below.

• FOK output: IC501 ts pin
• S curve P-to-P value: 1.2 Vp-p IC501 wa pin

When checking S curve P-to-P value, remove the lead wire to
disc motor.

• RF signal P-to-P value: 0.8 to 1.3 Vp-p
• Traverse signal P-to-P value: 0.7 to 1.8 Vp-p
• The repairing grating holder is impossible.

Laser light of the equipment is focused by the object lens in the
optical pick-up so that the light focuses on the reflection surface
of the disc. Therefore, be sure to keep your eyes more then 30 cm
apart from the object lens when you check the emission of laser
diode.

During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper panel is closed while turning
ON the S423. (push switch type)
However, in the service mode, the laser diode always emits light
even if S423 is not turned on.
The following two checking methods for the laser diode are oper-
able.

1. Open the upper lid.
2. Push the S423 as shown in Fig. 1.

(Unnecessary in the service mode)

3. Press the 

[CD     ]

 key.

4. Check the object lens for confirming normal emission of the

laser diode. If not emitting, there is a trouble in the automatic
power control circuit or the optical pick-up.
During normal operation, the laser diode is turned ON about
2.5 seconds for focus searching.

u

– 4 –

1-673-930-

11

(11)

C586

C585

C587

C493

C495

R478

R844

99

R476

C419

R483

R477

C551

C545

C565

C569

C807
C806
C805

R591

R567

C505

R565

R850

C619

C609

C542

R535

C536

C533

C555

R851

C554

R524

C516

R525

R501

R575

R576

R558

R557

R566

R854

R568

C504
C559

C506

R584

R631

C540

R552

R553

R549

C494

FB401

L508

L515

C510

L501

C801

C553

C552

C803

R632

C502

C519

R539

D512

D501

Q601

IC404

C534

+

C543

+

C610

+

C608

+

C541

+

C535

+

C520

+

C564

+

C568

+

C595

+

C515

+

C561

+

14

13

8

1

9

16

AK

A

K

D504

A
A

K

Q514

Q507

Q505

B C E

B C E

BC

E

BC

E

Q503

2E2B 1C

2C1B 1E

Q502

2E2B1C

2C1B 1E

2B 2E

TP

(IOP 0)

TP

(IOP 1)

1C

1B 2C

1E

2C
1B
1E

2E
2B
1C

Q501

Q513

L511

TP

(RF)

TP

(TE)

TP

(GND)

TP

(VC)

+
–

digital voltmeter

(DC3 V range)

1. Remove the upper panel.
2. Connect a digital voltmeter as show in Fig. 2.
3. Press the 

[CD     ]

 key.

4. Calculate current value by the reading of the digital voltmeter.

Reading of the digital voltmeter (V) 

÷

 2.2 (

Ω

) = current value

(A)
(Example) Reading of the digital voltmeter of 0.082 V:
0.082 V

÷

2.2 

Ω

= 0.037 (A) = 37 mA

Current value of the specified: 16 to 18 mA

5. Check that the current value is within the following range.

• Current value of the specified 

 mA (25 ˚C)

Variation by temperature: 0.4 mA/˚C
Current increases with temperature increased.
Current decreases with temperature decreased.

If the current is more than the range above, there is a trouble
in the automatic power control circuit or the laser diode is in
deterioration.
If less than the range, a trouble exists in the automatic power
control circuit or the optical pick-up.

u

+5
–11