DOWNLOAD Sony HCD-C20 / HCD-G202 / MHC-C20 / MHC-G202 Service Manual ↓ Size: 18.58 MB | Pages: 60 in PDF or view online for FREE

— 1 —

HCD-C20/G202 is the tuner, deck, CD
and amplifier section in MHC-C20/G202.

Model Name Using Similar Mechanism

NEW

CD Mechanism Type

CX3

Base Unit Type

KSM-213BCM

Optical Pick-up Type

KSS-213B/S-N

Model Name Using Similar Mechanism

HCD-H100

TK20FX-SW943-800

TK20FX-SW943-800

CD

SECTION

US Model

Canadian Model

HCD-G202

AEP Model

UK Model

E Model

Australian Model

HCD-C20

DECK-A

DECK-B

TAPE

DECK

SECTION

Tape Transport
Mechanism Type

Photo: HCD-C20 (AEP model)

2001

F

0200-1

© 2001.

6

— 2 —

!

To Exposed Metal
Parts on Set

0.15µF

1.5k

Ω

AC
voltmeter
(0.75V)

Earth Ground

After correcting the original service problem, perform the follow-
ing safety checks 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.

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). Leak-
age 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” 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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)

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

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

This caution
label is located
inside the unit.

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

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

 damaged by heat.

• Keep the temperature of 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.

!

!

— 3 —

.......................................................................... 4

2-1. CD Door ............................................................................... 5
2-2. CD Mechanism Deck ............................................................ 5
2-3. Front Panel and Main Board ................................................. 6
2-4. Main Board and Tuner Board ............................................... 6
2-5. CD Tray ................................................................................ 7
2-6. CD Decoder Board ................................................................ 7
2-7. Base Unit .............................................................................. 8

................................ 9

................................. 9

5-1. Circuit Boards Location ...................................................... 14
5-2. Block Diagrams

• Tuner Section

(US, CND, E, SP, MY, MX, AUS models) ...................... 15

• Tuner Section (AEP, UK models) .................................... 17
• CD Section ....................................................................... 19
• Deck Section .................................................................... 21
• Main Section

(US, CND, E, SP, MY, MX, AUS models) ...................... 23

• Main Section (AEP, UK models) ..................................... 25
• Power Section

(US, CND, E, SP, MY, MX, AUS models) ...................... 27

• Power Section (AEP, UK models) ................................... 28

5-3. IC Block Diagrams .............................................................. 29
5-4. Printed Wiring Board —Main Section —

(US, CND, E, SP, MY, MX, AUS models) ......................... 34

5-5. Schematic Diagram — Main Section —

(US, CND, E, SP, MY, MX, AUS models) ......................... 39

5-6. Schematic Diagram — Main Section —

(AEP, UK models) .............................................................. 43

5-7. Printed Wiring Board —Main Section —

(AEP, UK models) .............................................................. 47

5-8. Printed Wiring Board — CD Section — ............................. 52
5-9. Schematic Diagram — CD Section — ............................... 57
5-10. Schematic Diagram — Panel Section — ......................... 61
5-11. Printed Wiring Board — Panel Section — ....................... 65
5-12. Printed Wiring Board — Tuner Section —

(US, CND, E, SP, MY, MX, AUS models) ....................... 71

5-13. Schematic Diagram — Tuner Section —

(US, CND, E, SP, MY, MX, AUS models) ....................... 75

5-14. Schematic Diagram — Tuner Section —

(AEP, UK models) ............................................................ 79

5-15. Printed Wiring Board — Tuner Section —

(AEP, UK models) ............................................................ 83

5-16. IC Pin Function ................................................................ 87

6-1. Top and Bottom Cabinet Section ........................................ 89
6-2. Front Panel Section ............................................................. 90
6-3. Cassette Mechanism Deck Section 1 .................................. 91
6-4. Cassette Mechanism Deck Section 2 .................................. 92
6-5. CD Mechanism Deck Section 1 .......................................... 93
6-6. CD Mechanism Deck Section 2 .......................................... 94
6-7. Base Unit Section (KSM-213BCM) ................................... 95

........................................ 96

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.

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, ob-
serve from more than 30 cm away from the objective lens.

AEP model

(Without voltage selector)

Singapore, Malaysia model

(With voltage selector)

UK model

US, Canadian model

Australian model

For detailed German, East European, CIS
model, refer to AEP model.

E, Mexican model

• Abbreviation

CND : Canadian model
MX : Mexican model
SP

: Singapore model

MY : Malaysia model
AUS : Australian model

— 4 —

6

5

4

2

1

@º p(stop) button

@¡ CD button
@™ TAPE button
@£ TUNER/BAND button
@¢ PRESET – button
@∞ PRESET + button
@§ MEMORY button
@¶ – TUNING +/≠ 0/

) ± buttons

@• PRESET EQ button
@ª Deck B
#º Tape operating buttons

r (recording) (for deck A only)
· (play)
0 (fast rewind)
) (fast forward)
p6 (stop/eject)
P (pause)

#¡ Deck A

1 Disc tray
2 DISC 1 button
3 DISC 2 button
4 DISC 3 button
5 DISC SKIP button
6 § OPEN/CLOSE button

7 DBFB button
8 VOLUME knob
9 Display window
!º TIMER SET, CLOCK LIGHT button
!¡ TIMER MODE button
!™ Remote sensor
!£ CLOCK SET button
!¢ POWER button
!∞ PHONES jack
!§  P (play/pause) button

!¶ SHUFFLE button
!• PROGRAM button
!ª REPEAT button

¢

3

!∞ !§

!¶ !• !ª@º@¡

@™

@£

#º

#¡

!™

!£

!¡

!¢

!º

9

8

7

@•

@§

@∞

@¢

@¶

@ª