Sony ICF-CD830 Service manual

ICF-CD830/CD830L

SERVICE MANUAL

Ver 1.0 2001. 03

Photo : ICF-CD830

SPECIFICATIONS

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 Wow and flutter: Below measurable limit

Radio section

Frequency range:

ICF-CD830 ICF-CD830L

FM 87.5-108 MHz

America

AM 530-1 710 kHz

North and South

FM 87.5-108 MHz 87.5-108 MHz AM(MW) 530-1 710 kHz 530-1 710 kHz

Other

countries

–

–1.5

– –

153-255 kHz

US Model

Canadian Model

AEP Model

E Model

Australian Model

ICF- CD830

UK Model

ICF- CD830L

Model Name Using Similar Mechanism ICF-CD823 Optical Device Name KSM-213CDM Optical Pick-UP Name KSS-213C

General

Time display:

North and South America, UK and Australia: 12-hour system Other countries: 24-hour system

Speaker:

66 mm (2

Power outputs:

1.2 W + 1.2 W

Power requirements:

North and South American model:

Australian model:

Other models:

Dimensions:

Approx. 273 × 94.5 × 194.5 mm (w/h/d) (Approx. 10 projecting parts and controls

Mass:

Approx. 1 705 g (3 lb. 12 oz.) ICF-CD830L (UK model): Approx. 1 725 g (3 lb. 13 oz.)

Design and specifications are subject to change without notice.

⁄8 inches) dia., 4 Ω

(at 10% harmonic distortion)

120 V AC, 60 Hz

240 V AC, 50 Hz

220-230 V AC, 50 Hz

⁄4 × 3 3⁄4 × 7 3⁄4 inches) incl.

9-873-107-11

CD CLOCK RADIO

Sony Corporation

Audio Entertainment Group General Engineering Dept.

ICF-CD830/CD830L

1. GENERAL ········································································ 4

2. DISASSEMBLY

2-1. UPPER CASE ······························································· 5 2-2. KEY BOARD································································5 2-3. TRANSFORMER BOARD··········································· 6 2-4. MAIN CHASSIS ··························································· 6 2-5. OPTICAL PICK-UP BLOCK (KSM-213CDM) ·········· 6

3. TEST MODE ·······························································7

4. ELECTRICAL ADJUSTMENTS ·····························9

5. DIAGRAMS

5-1. CIRCUIT BOARDS LOCATION ······························· 10 5-2. BLOCK DIAGRAM (CD830) ···································· 11 5-3. BLOCK DIAGRAM (CD830L)·································· 12 5-4. SCHEMATIC DIAGRAM

– TUNER SECTION (CD830) –································· 13

5-5. SCHEMATIC DIAGRAM

– TUNER SECTION (CD830L) – ······························ 14

5-6. SCHEMATIC DIAGRAM

– CD SECTION – ······················································· 15

5-7. SCHEMATIC DIAGRAM

– POWER SECTION – ··············································· 16

5-8. PRINTED WIRING BOARD

– MAIN SECTION – ·················································· 17

5-9. PRINTED WIRING BOARD

– KEY/POWER SECTION –······································18

5-10.SCHEMATIC DIAGRAM

– KEY SECTION – ····················································· 19 5-11.IC BLOCK DIAGRAMS ············································ 20 5-12.IC PIN FUNCTION DESCRIPTION ························· 22

SAFETY CHECK-OUT

After correcting the original service problem, perform the following 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 A C voltmeter . The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive V OM that is suitable. Nearly all battery operated digital multimeters that have a 2 V A C range are suitable. (See Fig. A)

To Exposed Metal Parts on Set

0.15 µF

1.5 k

Ω

voltmete (0.75 V)

6. EXPLODED VIEWS

6-1. CABINET SECTION··················································23 6-2. CHASSIS SECTION··················································· 24 6-3. OPTICAL PICK-UP SECTION

(KSM-213CDM) ·························································25

7. ELECTRICAL PARTS LIST ································· 26

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE P ART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU D ANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

Earth Ground

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

Note 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.

ICF-CD830/CD830L

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down 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 pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

CHUCK PLATE JIG ON REPAIRING

On repairing CD section, playing a disc without the CD lid, use Chuck Plate Jig.

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

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

1. Open the CD lid.

2. Turn on S401 as following figure.

3. Confirm that 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 once for the focus search.

Insert a precision screwdriver and push S401

laser diode emission

This Compact Disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the bottom exterior.

CAUTION

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

ICF-CD830/CD830L

AC power cord Cordon d’alimentation secteur

FM wire antenna Antenne fil FM

VOLUME

SECTION 1

GENERAL

ICF-CD830

This section is extracted from instruction manual.

Setting the Clock and Date

Plug in the clock radio.

The display will flash “AM 12:00” or “0:00”.

Press CLOCK for a few seconds.

You will hear a beep and the year will start to flash in the display.

Press TIME SET + or – until the correct year appears in the display.

Press CLOCK once.

Repeat steps 3 and 4 to set the month, day, hour, and minute.

After setting the minute, press CLOCK to start the counting of the seconds, and you will hear two short beeps.

• To display the year and date, press SNOOZE/ DATE/SLEEP OFF once for the date, and within

2 seconds press it again for the year. The display shows the date or year for a few seconds and then changes back to the current time.

• To set the current time rapidly, hold down TIME SET + or –.

• The clock system varies depending on the model you own. 12-hour system: “AM 12:00” = midnight 24-hour system: “0:00” = midnight

• In step 5, when you press CLOCK after the minute setting to activate the clock, the seconds start counting from zero.

To change the display to the daylight saving time (summer time) indication

Press D.S.T./SUMMER T.

“

” is displayed and the time indication

changes to summer time. To deactivate the summer time function, press

D.S.T./SUMMER T. again.

ICF-CD830L

SECTION 2

)

DISASSEMBLY

• The equipment can be removed using the following procedure.

Upper case

Set

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

Key board Transformer board

2-1. UPPER CASE

2 Lid, CD

Main chassis Optical pick-up block (KSM-213CDM

ICF-CD830/CD830L

3 Screw (+P3 × 14)

5 Upper cas

2-2. KEY BOARD

4 Connector (CN371)

1 Five screws (+P3 × 14)

1 Five screws

(+P3 × 10)

4 Wire

3 Key boar

2 Hook

ICF-CD830/CD830L

2-3. TRANSFORMER BOARD

2 T wo screws (+P3 × 10)

1 Connector (CN901)

4 T ransf ormer board

3 Bracket (Trans)

Transformer board

Power cord

2-4. MAIN CHASSIS

2 Six screws (+P3 × 10)

3 Connector (CN901)

4 Main chassis

1 T wo screws

(+P3 × 10)

2-5. OPTICAL PICK-UP BLOCK (KSM-213CDM)

3 Optical pick-up bloc (KSM-213CDM)

1 T wo screws

2 T wo screws

(2.6 × 10)

SECTION 3

TEST MODE

3-1. LCD Test Mode

• The LCD test mode is initiated by turning off the main power once then back on or by resetting the machine while IC401 pin-60 terminal is connected to GND, or while depressing the D.S.T. , ALARM MODE and RADIO keys simultaneously.

• The LCD test mode operations are listed in the following table.

• When the machine enters the LCD test mode, the version number of the

system control IC is displayed on the LCD.

• Pressing the SNOOZE/DATE/SLEEP OFF key turns on all segments of LCD and LEDs.

• Pressing any key turns off the corresponding segment of the LCD.

Correspondence between the keys and segments of LCD are as follows.

ICF-CD830/CD830L

(LCD segment)

fgb

1234 56

KEY D.S.T. ALARM MODE ALARM SET CD ALARM SET BUZZER ALARM SET RADIO CLOCK

TIME SET –

TIME SET +

ALARM CD RADIO BUZZER ALARM-CD LED ALARM-BUZZER LED ALARM-RADIO LED AM, PM,: 1a, 1b, 1c, 1d, 1e, 1f, 1g, 2a, 2b, 2c, 2d, 2e, 2f, 2g 3a, 3b, 3c, 3d, 3e, 3f, 3g, 4a, 4b, 4c, 4d, 4e, 4f, 4g

SEGMENT

KEY

CD PLAY MODE

CD RADIO

OFF

SNOOZE/DATE/ SLEEP OFF

SEGMENT REP, 1, ALL, SHUFFLE, , , , CD, H, TRACK RADIO, SLEEP 5a, 5b, 5c, 5d, 5e, 5f, 5g, 6a, 6b, 6c, 6d, 6e, 6f, 6g

• After all segments of LCD and LEDs turn off, pressing the SNOOZE/DATE/SLEEP OFF key ends the LCD test mode and resets the machine.

3-2. CD Test Mode

3-2-1. CD TEST-1 (AUTO)

• The CD TEST-1 (AUTO) mode is initiated by turning of f the main po wer once then back on or by resetting the machine while IC401 pin59 terminal (RADIO LED) is connected to GND, or while depressing the D.S.T. , ALARM MODE and CD keys simultaneously.

• When the machine enters CD TEST-1 (AUTO) mode, it repeats the focus search until the focus becomes OK.

• After the focus becomes OK and the focus is automatically adjusted, rough servo is locked in and the adjustment value is displayed.

F-E BALANCE ADJUSTMENT

TRACKING GAIN ADJUSTMENT

FOCUS BIAS ADJUSTMENT

SHUFFLE

TRACK

• The sled can be moved to the innermost track by pressing the . button. The sled can be moved to the outermost track by pressing the > button.

• When the RADIO button is pressed, the machine enters the CLVA (servo ON) and the mute is turned OFF if data is read successfully. When the following button is pressed, the corresponding operations are performed.

a) ALARM SET CD Setting the 1 track jump b) ALARM SET RADIO Setting the 10 track jump c) ALARM SET BUZZER Setting the 100 track jump

Afterwards the desired track jump can be set by pressing the > or . button. d) ALARM MODE TRACKING GAIN-UP e) RADIO Rough servo

• D.S.T. restarts CD TEST-1 (AUTO) mode from the focus automatic adjustment

• When the CD button is pressed then, the track jumps to the second session and the machine exits the CD TEST-1 (AUTO) mode.

3-2-2. CD TEST-2 (MANUAL)

• The CD TEST-2 (MANUAL) mode is initiated by turning off the main po wer once then back on or b y resetting the machine while IC401 pin-58 terminal (CD LED) is connected to GND.

• When the machine enters CD TEST-2 (MANUAL) mode, it repeats the focus search until the focus becomes OK.

• After the focus becomes OK, the machine enters the rough servo.

• The sled can be mov ed to the innermost track by pressing the . button. The sled can be mo v ed to the outermost track by pressing the

> button.

• When the RADIO button is pressed, the machine enters the CLVA (servo ON) and the mute is turned OFF if data is read successfully. When the RADIO button is pressed again, the machine enters the rough servo.

• When the CD button is pressed then, the track jumps to the second session and the machine exits the CD TEST-2 (MANUAL) mode.

ICF-CD830/CD830L

CD TEST-1

FOCUS

Auto adjustment

Rough servo

CD button

TEST MODE END

The second music

played back.

CD button

± button

Sled movement

± button

Y : YES N: NO

Servo ON

RADIO

button

YYY

RADIO

button

CD TEST-2

FOCUS

Rough servo

± button

jump has been set?

Executes the

setting of jump.

RADIO

button

ALARM SET

RADIO

YY Y Y

Sets the respective

setup values.

button

ALARM SET

BUZZER

ALARM

MODE

TRACKING

GAIN UP

D.S.T.

Sled movement

± button

Servo ON

button

TEST MODE END

The second music

played back.

SECTION 4

FM RF signal generator

Carrier frequency: 98 MHz Modulation: no modulation Output level: 0.1 V (100 dB)

0.01 µF

FM lead wire antenna terminal

ELECTRICAL ADJUSTMENTS

ICF-CD830/CD830L

PRECAUTION

• Adjustment should be performed in the order given.

TUNER SECTION 0 dB=1 µV

[FM]

Setting:

Function switch : RADIO BAND switch : FM

FM RF signal generator

0.01 µF

75 kHz frequency deviation by 1 kHz signal. Output level: as low as possible

[AM (MW/LW) ]

Setting:

Function switch : RADIO BAND switch : AM (MW/LW)

AM RF signal generator

FM lead wire antenna terminal

Put the lead-wire antenna close to the set.

MW FREQUENCY COVERAGE ADJUSTMENT (CD830L)

Adjust for a maximum reading on level meter

L4 515 kHz

CT4 1,750 kHz

MW TRACKING ADJUSTMENT (CD830L)

Adjust for a maximum reading on level meter

L1-1 600 kHz CT1 1,400 kHz

LW FREQUENCY COVERAGE ADJUSTMENT (CD830L)

Adjust for a maximum reading on level meter

CT6 145 kHz

LW TRACKING ADJUSTMENT (CD830L)

Adjust for a maximum reading on level meter

L1-2 160 kHz

CT5 240 kHz

FM VCO Adjustment

Procedure:

• Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

AM FREQUENCY COVERAGE ADJUSTMENT (CD830)

30% amplitude modulation by 400 Hz signal. Output level: as low as possible

level meter

4 Ω

set

SPEAKER OUT

FM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter

L3 86.5 MHz (87.35 MHz)

CT3 109.5 MHz (108.25 MHz)

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L2 86.5 MHz (87.35 MHz)

CT2 109.5 MHz (108.25 MHz)

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter

T1 455 kHz

Adjust for a maximum reading on level meter

L4 515 kHz (516.5 kHz)

CT4 1,750 kHz (1,631.5 kHz)

AM TRACKING ADJUSTMENT (CD830)

Adjust for a maximum reading on level meter

L1 600 kHz

CT1 1,400 kHz

–

( ) : AEP Model

1. Connect the frequency counter to 4 and 7 pins of IC1 as shown the figure right.

2. Tune the set to 98 MHz.

3. Adjust RV1 for 76 kHz reading on frequency counter.

Specification V alue:

Frequency counter

75,950 – 76,050 Hz

Connection:

frequency counter

+ –

33 k Ω

MAIN Boar

IC1 Pin 7 IC1 Pin 4

Adjustment Location: [MAIN BOARD] (Component Side)

L3 CT3 L3 FM Frequency Coverage Adjustment

L4 CT4 AM Frequency Coverage Adjustment MW Frequency Coverage Adjustment

AM IF Adjustment

CT6 LW Frequency Coverage Adjustment

CT2

L2 FM Traking Adjustment

CT1 AM Tracking Adjustmen MW Tracking Adjustme

CT5 LW Traking Adjustment

L1-2 LW Traking Adjustment

L1, L1-1 AM Tracking Adjustment MW Tracking Adjustment

ICF-CD830/CD830L

SECTION 5

DIAGRAMS

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• : Pattern from the side which enables seeing.

Note on Schematic Diagrams:

• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/ specified.

•

• 2 : nonflammable resistor.

• C : panel designation.

• H : adjustment for repair.

• A : B+ Line.

• Voltages and waveforms are dc with respect to ground

Note:

The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified.

• Voltages are taken with a VOM (Input impedance 10 M Ω).

• Signal path.

• Abbreviation

: internal component.

under no-signal (detuned) conditions.

no mark : FM ( ) : AM (MW/LW) < > : CD

Voltage variations may be noted due to normal production tolerances.

F : FM f : AM (MW/LW) J : CD

AUS : Australian model CND : Canadian model IT : Italian model SP : Singapore model

W or less unless otherwise

Note:

Les composants identifiés par une marque ! sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.

• Waveforms

IC401 ud (XT1)

31 ms

1.0 V/DIV, 20 ms/DIV

IC501 ed (RF0)

(PLAY MODE)

0.2 V/DIV, 500 ns/DIV

IC551 ua (XTA0)

59 ns

2.0 V/DIV, 40 ns/DIV

3.4 Vp-p

0.9 – 1.3 Vp-p

5.6 Vp-p

5-1. CIRCUIT BOARDS LOCATION

TRANSFORMER board

LED board

MOTOR (6P) board

KEY board

MAIN board

5-2. BLOCK DIAGRAM (CD830)

ANT1

(FM ANTENNA)

TRACKING

FREQUENCY

COVERAGE

TRACKING

FREQUENCY

COVERAGE

MAIN BOARD

AM OSC

BPF1

B.P.F

CT2 CV1-2

FM RF

CT3

FM OSC

AM FERRITE-ROD

ANTENNA

CT1

CT4

CV1-3

CV1-1

CV1-4

FRONT- END

FM RF IN

REG

FM RF OUT

FM OSC

AM RF

AM OSC

FM/AM

IC1

MIX OUT

DISCRI

VCO

ICF-CD830/CD830L

RV351

L OUT

CF3

AM IFT

10.7MHz

CF2

455kHz

CF1

RV1

VCO

FM IF

AM IF

BAND

+B SW

R OUT

+5VTU +B

BUFFER

Q131

BUFFER

Q231

BUFFER

Q101

BUFFER

Q201

SYSTEM CONTROL

IC401

POWER ON

RADIO ON

A MUTE

BUZZER

SEG0

SEG15

COM0

COM3

KEY0

KEY12

MUTE Q151

MUTE CONT Q351

LIQUID CRYSTAL

LCD401

DISPLAY PANEL

MUTE Q251

VOLUME

POWER AMP

IC371

SP101

SP201

(SPEAKER)

KEY BOARD

S601-613 FUNCTION

KEY

OPTICAL PICK-UP

BLOCK

(KSS-213C)

GND

F+

FOCUS

COIL

F-

T+

TRACKING

COIL

T-

MOTOR(6P)

BOARD

M571 SLED

MOTOR

M572

SPINDLE

MOTOR

D653

ALM-CD LED

D652

DIGITAL SERVO

RF AMP

IC501

RFO

+5V

Q501

DRIVE

PD1

PD2

SLO

TAO

FEO

MOTOR/COIL DRIVE

F+

F-

T+

T-

T IN

SL IN

SL+

SL-

SP+

SP-

IC591

DATA

COUT

RFI

CLK

XLT

FOK

F IN

SP IN

MUTE

25SENS1

26SENS2

23XRST

DIGITAL SIGNAL PROC.

D/A CONV.

IC551

L OUT1

A OUT1

L OUT2

A OUT2

DATO

CLKO

XLTO

FOK

CIN

SEIN

MDP

XLON MUTE

SPOA(LIMIT)

DATA

SENS

SMUTE

XTAI

XTAO

XRST

9CLK

8XLAT

4SQCK

57SCOR

5SQSO

X551

16.9344MHz

ALM-RADIO LED

ALM-BUZZER LED

C DATA

C CLOCK

C LATCH

C SQCK

C SCOR

C SQSO

C SENS

C MUTE

RESET

CD ON

D651

D401-402

49AC IN

RESET IC402

IC402

CD +B

M +6V

D903

D905-908

D904

TRANSFORMER

BOARD

T901

POWER

TRANSFOMER

+B SW

Q551

+5V

REG

Q901

REG

Q903

AC IN

LED

BOARD

S570

LIMIT

S401

DOOR SW

C SENS2

C RST

DOOR IN

• Signal Path

: FM

: AM

: CD

1111

+ 23 hidden pages

Sony ICF-CD830 Service manual

TABLE OF CONTENTS

GENERAL

DISASSEMBLY

Upper case

Transformer board

4 Main chassis

TEST MODE

ELECTRICAL ADJUSTMENTS

DIAGRAMS