Sony Walkman icf-cd832 User manual

SERVICE MANUAL

ICF-CD832

Ver 1.1 2004. 03

9-877-554-02

2004C04-1

US Model

Canadian Model

CD Model Name Using Similar Mechanism ICF-CD831

Section CD Mechanism Type KSM-213RDP

Optical Pick-up Name KSS-213R

Sony Corporation

Personal Audio Company

Published by Sony Engineering Corporation

FM/AM CD CLOCK RADIO

–1.5

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION

With 8-ohm loads, both channels driven from 100 – 10,000 Hz; rated 1.0

W per channel minimum RMS power, with no more than 10% total

harmonic distortion in AC operation.

CD player section

System:

Compact disc digital audio system

Laser diode properties:

Material: GaAlAs

Wavelength: 780 nm

Emission duration: Continuous

Laser output: Less than 44.6 µW

(This output is the value measured at a distance of

about 200 mm from the objective lens surface on

the optical pick-up block with 7 mm aperture.)

Frequency response:

20 – 20,000 Hz dB

Wow and flutter:

Below measurable limit

Radio section

Frequency range:

FM: 87.5 – 108 MHz

AM: 530 – 1,710 kHz

General

Time display:

12-hour system

Speaker:

66 mm (2 5 ⁄8 inches) dia., 8 Ω

Power outputs:

1 W + 1 W (at 10% harmonic distortion)

Power requirements:

120 V AC, 60 Hz

Dimensions:

Approx. 229 ×104 ×218 mm (w/h/d)

(Approx. 9 1 ⁄8 ×4 1 ⁄8 ×8 5 ⁄8 inches) incl.

projecting parts and controls

Mass:

Approx. 1,650 g (3 lb. 10 oz.)

Design and specifications are subject to change without

notice.

ICF-CD832

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE

WITH MARK 0ON THE SCHEMATIC DIAGRAMS AND IN

THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.

REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE

PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR

IN SUPPLEMENTS PUBLISHED BY SONY.

Flexible Circuit Board Repairing

•Keep the temperature of the soldering iron around 270˚C during

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.

Notes on Chip Component Replacement

•Never reuse a disconnected chip component.

•Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK

OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic

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.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on

the disc reflective surface by the objective lens in the optical pick-

up block. Therefore, when checking the laser diode emission,

observe from more than 30 cm away from the objective lens.

CAUTION

Use of controls or adjustments or performance of proce-

dures other than those specified herein may result in haz-

ardous radiation exposure.

1.5 k

Ω

0.15 µFAC

voltmeter

(0.75 V)

To Exposed Metal

Parts on Set

Earth Ground

SAFETY CHECK-OUT

After correcting the original service problem, perform the follow-

ing safety check before releasing the set to the customer:

Check the antenna terminals, metal trim, “metallized” knobs,screws,

and all other exposed metal parts for AC leakage.

Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and

from all exposed metal parts to any exposed metal part having a

return to chassis, must not exceed 0.5 mA (500 microampers.).

Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA

WT-540A. Follow the manufacturers’instructions to use these

instruments.

2. A battery-operated AC milliammeter. The Data Precision 245

digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a

VOM or battery-operated AC voltmeter. The “limit” indica-

tion is 0.75 V, so analog meters must have an accurate low-

voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-

amples of a passive VOM that is suitable. Nearly all battery

operated digital multimeters that have a 2 V AC range are suit-

able. (See Fig. A)

Fig. A. Using an AC voltmeter to check AC leakage.

Ver 1.1

(Fig. A)

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR LES

DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES

SONT CRITIQUES POUR LASÉCURITÉ DE FONCTIONNEMENT.

NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES

SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL

OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

TABLE OF CONTENTS

1. SERVICING NOTES

1-1. Cord Dressing (Power Cord) ............................................... 5

1-2. Pointer Alignment ............................................................... 5

2. GENERAL............................................................................ 6

3. DISASSEMBLY

3-1. Cabinet (Upper) Assy .......................................................... 7

3-2. Lid (CD) .............................................................................. 8

3-3. Chassis Assy ........................................................................ 8

3-4. Main Board, Drive Board .................................................... 9

3-5. Key (A) Board, Key (B) Board ........................................... 9

3-6. CD Mechanism Deck ........................................................ 10

3-7. Optical Pick-up ................................................................. 10

4. ELECTRICAL ADJUSTMENTS

Tuner Section......................................................................... 11

CD Section ............................................................................ 13

5. DIAGRAMS

5-1. Circuit Boards Location .................................................... 14

5-2. Block Diagram – CD Section –......................................... 15

5-3. Block Diagram – Tuner Section – ..................................... 16

5-4. Block Diagram – Main Section –...................................... 17

5-5. Printed Wiring Board – CD Section –............................... 18

5-6. Schematic Diagram – CD Section –.................................. 19

5-7. Schematic Diagram – Main Section –............................... 20

5-8. Printed Wiring Board – Main Section –............................ 21

5-9. Schematic Diagram – Control, Display Section – ............ 22

5-10. Printed Wiring Boards – Key Section – ............................ 23

5-11. Printed Wiring Board – Drive Section – ........................... 24

5-12. Printed Wiring Board – Transformer Section –................. 25

5-13. IC Pin Description............................................................. 26

5-14. IC Block Diagrams............................................................ 26

6. EXPLODED VIEWS

6-1. Cabinet (Upper) Section.................................................... 28

6-2. Cabinet (Lower) Section ................................................... 29

6-3. Chassis Section ................................................................. 30

6-4. CD Mechanism Section..................................................... 31

7. ELECTRICAL PARTS LIST ........................................ 32

ICF-CD832

CHUCK PLATE JIG ON REPAIRING

On repairing CD section, playing a disc without the lid (CD), use

Chuck Plate Jig.

• Code number of Chuck Plate Jig: X-4918-255-1

SECTION 1

SERVICING NOTES

LASER DIODE AND FOCUS SEARCH OPERATION

CHECK

1. Turn ON the [POWER] button and press [CD] button to CD

position.

2. Open the CD lid.

3. Turn on S401 with screwdriver, etc. as following figure.

4. Press the N X (CD) button.

5. Confirm the laser diode emission while observing the objecting

lens. When there is no emission, Auto Power Control circuit or

Optical Pick-up is broken.

Objective lens moves up and down three times for focus search.

S401

ICF-CD832

1-1. CORD DRESSING

(POWER CORD)

1) Set the power cord as shown in the figure.

pointer

Fit the protrusion on the

pointer in the hole A.

Align the notch on the

boss of the knob (tune)

with the direction of CV1.

knob (tune)

chassis assy

Turn this in the arrow direction

until stopped.

power cord

1-2. POINTER ALIGNMENT

ICF-CD832 SECTION 2

GENERAL This section is extracted

from instruction manual.

ICF-CD832

•The equipment can be removed using the following procedure.

SECTION 3

DISASSEMBLY

3-1. CABINET (UPPER) ASSY

(Page 7)

3-3. CHASSIS ASSY

(Page 8)

SET

3-4. MAIN BOARD,

DRIVE BOARD

(Page 9)

3-5. KEY (A) BOARD,

KEY (B) BOARD

(Page 9)

3-7. OPTICAL PICK-UP

(Page 10)

3-2. LID (CD)

(Page 8)

3-6. CD MECHANISM DECK

(Page 10)

3-1. CABINET (UPPER) ASSY

Note : Follow the disassembly procedure in the numerical order given.

two screws

(BV tapping (B3))

four screws

(BV tapping (B3))

cabinet (upper) sub ass

connector

ICF-CD832

3-3. CHASSIS ASSY

3-2. LID (CD)

screw

(BV tapping (B3))

screw

(BV tapping (B3))

two screws

(BV tapping (B3))

damper

holder (CD)

claws

CD lid sub assy

cabinet (upper) sub assy

three screws

(BV tapping (B3))

chassis assy

CN901

CN301

ICF-CD832

3-4. MAIN BOARD, DRIVE BOARD

3-5. KEY (A) BOARD, KEY (B) BOARD

five screws

(P 3x10)

MAIN boar

Removal the solders.

shield plate (main)

chassis assy

CN601

CN501

DRIVE board

two screws

(B 2x8)

three screws

(B 2x8)

KEY (A) board

KEY (B) boar

ICF-CD832

3-7. OPTICAL PICK-UP

3-6. CD MECHANISM DECK

two screws

(PWH 2.6x10)

screw

(BVTT 2x6)

Removal the solders.

CD board

CD mechanism deck

Removal the solders.

CD cover

two screws

(PWH 2.6x10)

CNP701

screw

(PWB tapping (M2)

)

screw

(PWB tapping (M2))

gear (A)

claw

sled shaft

optical pick-up