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2

0

0

0

µ

Ω

    After correcting the original service problem, perform the
following 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 microamperes).
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” 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 VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)

Power requirements
North American models:

120 V AC, 60 Hz

European models:

230 V AC, 50/60 Hz

Australian models:

230 – 240 V AC,
50/60 Hz

Mexican models:

120 V AC, 50/60 Hz

Other models:

120 V, 220 V or
230 – 240 V AC,
50/60 Hz
Adjustable with voltage
selector

Power consumption
USA models:
HCD-RG4SR:

160 watts

HCD-RG30T:

115 watts

HCD-RG20:

95 watts

Canadian models:
HCD-RG30T:

115 watts

HCD-RG20:

95 watts

European model:
HCD-RG20:

85 watts
1.0 watts (at the Power
Saving Mode)

Other model:
HCD-DX10:

85 watts

Dimensions (w/h/d)

Approx. 280 

×

 325 

×

 421 mm

Mass
North American models:
HCD-RG4SR:

Approx. 8.7 kg

HCD-RG30T:

Approx. 8.2 kg

HCD-RG20:

Approx. 7.8 kg

European model:
HCD-RG20:

Approx. 8.1 kg

Other model:
HCD-DX10:

Approx. 8.2 kg

Design and specifications are subject to change
without notice.

FM stereo, FM/AM superheterodyne tuner

Tuning range

87.5 – 108.0 MHz

Antenna

FM lead antenna

Antenna terminals

75 ohm unbalanced

Intermediate frequency

10.7 MHz

Tuning range
Pan-American models:

530 – 1,710 kHz (with the
interval set at 10 kHz)
531 – 1,710 kHz (with the
interval set at 9 kHz)

European and Middle Eastern models:

531 – 1,602 kHz (with the
interval set at 9 kHz)

Other models:

531 – 1,602 kHz (with the
interval set at 9 kHz)
530 – 1,710 kHz (with the
interval set at 10 kHz)

Antenna

AM loop antenna

Antenna terminals

External antenna terminal

Intermediate frequency

450 kHz

3

PARTS No.

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.

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

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

— BACK PANEL —

• Abbreviation

CND : Canadian model
AUS

: Australian model

AR

: Argentina model

SP

: Singapore model

TW

: Taiwan model

MX

: Mexican model

MY

: Malaysia model

E2

: 120V AC Area in E model

E3

: 240V AC Area in E model

E51

: Chilean and Peruvian model

·········································································· 4

································································ 6

···································································· 11

······························· 13

······································································ 15

5-1. Circuit Board Location ················································ 15
5-2. Block Diagrams ··························································· 16

Tuner/CD Section ························································ 16
Main Section ······························································· 17

5-3. Printed Wiring Board   CD Section ····························· 18
5-4. Schematic Diagram   CD Section ································ 19
5-5. Printed Wiring Board   Main Section ·························· 20
5-6. Schematic Diagram   Main Section (1/4) ···················· 21
5-7. Schematic Diagram   Main Section (2/4) ···················· 22
5-8. Schematic Diagram   Main Section (3/4) ···················· 23
5-9. Schematic Diagram   Main Section (4/4) ···················· 24
5-10. Printed Wiring Board   Address Sensor,

Driver Motor Section ··················································· 25

5-11. Printed Wiring Board   Panel Section ·························· 26
5-12. Schematic Diagram   Panel Section ···························· 27
5-13. Printed Wiring Board   Power Section ························ 28
5-14. Printed Wiring Board   Trans Section ·························· 29
5-15. Schematic Diagram   Trans Section ···························· 30
5-16. IC Block Diagrams ······················································ 31
5-17. IC Pin Function Description ········································ 34

6-1. Main Section ······························································· 36
6-2. Front Panel Section ····················································· 37
6-3. Main Board Section ····················································· 38
6-4. CD Mechanism Deck Section ····································· 39

······································· 40

RG20: US, CND models

RG20: AEP, UK models

DX10: E2, E3, E51, TW models

DX10: AUS, AR, MX models

RG30T

RG4SR

DX10: MY, SP models

4-234-701-0s

4-234-701-1s

4-234-701-2s

4-234-701-3s

4-234-701-4s

4-234-701-5s

4-234-701-6s

4

This section is extracted
from instruction manual.

1

2

3

4 5 6

7

8

9

q;

qa

qs

qd

qf

qg

qh

qj

qk

ql

w;

wa

ws

wd

wf

wg

wh

wj

wk

AUDIO jacks wd (19)
CD wk (10 – 12, 15)
CD SYNC qh (15)
Deck A ws (14)
Deck B qs (14 – 16)
DISC 1 – 3 4 (10, 11)
DISC SKIP EX-CHANGE 3

(10, 11)

Disc tray 5 (10)
DISPLAY w; (12)
EFFECT ON/OFF qd

(17)

GAME wg (18 – 20)

?/1 (power) 1
Z OPEN/CLOSE 6
Z (deck B) qa
M (fast forward) qf
. (go back) qj
> (go forward) qj
X (pause) qj
H (play) qj
x (stop) qj
m (rewind) qk
Z (deck A) wa

GAME EQ ql (17, 18, 20)
GROOVE 8 (17)
MOVIE EQ 7 (17)
MUSIC EQ 2 (17)
PHONES jack q;
REC PAUSE/START qg (15)
TAPE A/B wh (14, 15)
TUNER/BAND wj (12, 13, 15)
VIDEO jack wf (19, 20)
VOLUME control 9

5

1 2 3 4

5

6

7

8

9

0

qa

qs

qd

qf

qg

qh

qj

qk

ql

w;

wa

CD ql (10 – 12, 15)
CLEAR w; (11)
CLOCK/TIMER SELECT 2

(16, 19)

CLOCK/TIMER SET 3 (9, 16,

18)

DISPLAY 6 (12)
D.SKIP 7 (10)
ENTER qg (9, 11 – 13, 16, 18,

19)

EQ +/– qf (17)
GAME q; (18 – 20)
GROOVE qd (17)

ON/OFF qh (17)
PLAY MODE wa (10, 11)
PRESET +/– 5 (13)
REPEAT 8 (11)
SLEEP 1 (18)
STEREO/MONO 8 (13)
SURROUND qa (17)
TAPE A/B 9 (14, 15)
TUNER MEMORY qj (12, 13)
TUNER/BAND qk (12, 13)
TUNING +/– 5 (12, 13)
VOL +/– qs

?/1 (power) 4
M (fast forward) 5
. (go back) 5
> (go forward) 5
X (pause) 5
N (play) 5
m (rewind) 5
x (stop) 5

?/1

Proceed to step 5 when “CLOCK” appears
in the display.

.

>

.

>

The minute indication flashes.

.

>

If you made a mistake or want to change the time,
start over from step 2.

The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.