Sony HCDGS-200 Service manual

HCD-GS200

SERVICE MANUAL

Ver 1.2 2003. 10

HCD-GS200 is the Amplifier, CD player, Tape
Deck and Tuner section in MHC-GS200.

CD
Section

TAPE
Section

US Model

Canadian Model

Model Name Using Similar Mechanism HCD-GS300AV
CD Mechanism Type CDM64B-K1BD47A
Base Unit Name BU-K1BD47A
Optical Pick-up Name KSM-213BFN
Model Name Using Similar Mechanism HCD-GS300AV
Tape Transport Mechanism Type CMAL1Z221

Amplifier section
U.S.A. models:
AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:

with 6 ohms loads both channels driven, from
120 – 10,000 Hz; rated 60 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.

Continuous RMS power output

Total harmonic distortion less than 0.09%

60 + 60 watts
(6 ohms at 1 kHz,
10% THD)

(6 ohms at 1 kHz,
35 watts)

SPECIFICATIONS

Inputs
VIDEO (MD) IN (phono jacks):

GAME (AUDIO) IN (phono jack):

AUDIO IN (phono jacks): 450mV 47 kilohms

Outputs
PHONES (stereo phono jack):

FRONT SPEAKER: accepts impedance of 6 to

CD player section

System Compact disc and digital

Laser Semiconductor laser

Frequency response 2 Hz – 20 kHz (±0.5 dB)
Wavelength 780 – 790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
OPTICAL OUT (CD)
(Square optical connector jack, rear panel)
Wavelength 660 nm
Output Level –18 dBm

voltage 250 mV/450 mV,
impedance 47 kilohms

voltage 450 mV,
impedance 47 kilohms

accepts headphones of
8 ohms or more

16 ohms

audio system

(λ = 780 nm)
Emission duration:
continuous

Tape player section

Recording system 4-track 2-channel stereo
Frequency response 40 – 13,000 Hz (±3 dB),

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals
North American model: 75 ohms unbalanced
Intermediate frequency 10.7 MHz

AM tuner section

Tuning range 530 – 1,710 kHz

Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz

— Continued on next page —

using Sony TYPE I
cassette

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

9-874-022-03

2003J16-1
© 2003.10

COMPACT DISC DECK RECEIVER

Sony Corporation

Home Audio Company
Published by Sony Engineering Corporation

HCD-GS200

General

Power requirements 120 V AC, 60 Hz

Power consumption 120 watts

Dimensions (w/h/d) incl. projecting parts and controls

Mass Approx. 8.7 kg

Supplied accessories: Remote commander (1)

Design and specifications are subject to change
without notice.

Approx. 280 × 325 ×
465 mm

Batteries (2)
AM loop antenna (1)
FM lead antenna (1)

TABLE OF CONTENTS

1. SERVICING NOTES ······················································· 4

2. GENERAL ·········································································· 5

3. DISASSEMBLY ································································ 7

3-1. Cabinet Top ··································································· 8
3-2. Front Cabi Assy ····························································· 8
3-3. Back Panel Assy ···························································· 9
3-4. MAIN Board ································································· 9
3-5. AMP Board ································································· 10
3-6. POWER Board ···························································· 10
3-7. Holder (LED-S), Bracket (Middle-R),

Power Bracket ····························································· 11
3-8. CD Mechanism Deck (CDM64B-K1BD47A) ············ 11
3-9. Base Unit (BU-K1BD47A),

D.SENSOR (OUT) Board, T.SENSOR Board ············ 12
3-10.D.SENSOR (IN) Board, LOAD SW Board,

L.T MOTOR Board ····················································· 12
3-11.CD LED Board ···························································· 13
3-12.BU Holder Assy··························································· 13
3-13.CD Board ····································································· 14
3-14.Cassette Holder, Mech Deck (CMAL1Z221) ············· 14
3-15.Belt ·············································································· 15
3-16.DISPLAY Board ·························································· 15
3-17.KEY Board ·································································· 16
3-18.HEADPHONE Board, GAME LINK Board ··············· 16
3-19.DOOR LED Board ······················································ 17

4. TEST MODE ···································································· 18

5. MECHANICAL ADJUSTMENTS ····························· 19

6. ELECTRICAL ADJUSTMENTS ······························ 19

7. DIAGRAMS

7-1. Circuit Boards Location ·············································· 23
7-2. Block Diagrams ··························································· 24

– CD Section – ···························································· 24
– TUNER/TAPE Section – ·········································· 25
– AMP Section – ························································· 26

– DISPLAY/POWER Section –··································· 27
7-3. Printed Wiring Board – CD Section – ························ 28
7-4. Schematic Diagram – CD Section – ··························· 29
7-5. Printed Wiring Board

– CD MOTOR/SENSOR Section –····························· 30
7-6. Schematic Diagram

– CD MOTOR/SENSOR Section –····························· 31
7-7. Printed Wiring Board – MAIN Section – ··················· 32
7-8. Schematic Diagram – MAIN Section (1/3) – ············· 33
7-9. Schematic Diagram – MAIN Section (2/3) – ············· 34
7-10.Schematic Diagram – MAIN Section (3/3) – ············· 35
7-11.Printed Wiring Board – AMP Section – ····················· 36
7-12.Schematic Diagram – AMP Section – ························ 37
7-13.Printed Wiring Board – DISPLAY Section – ············· 38
7-14.Schematic Diagram – DISPLAY Section – ················ 39
7-15.Printed Wiring Board – POWER Section – ················40
7-16.Schematic Diagram – POWER Section – ·················· 41
7-17.IC Block Diagrams ······················································ 42
7-18.IC Pin Function Description ········································ 43

8. EXPLODED VIEWS

8-1. General Section ··························································· 48
8-2. Front Panel Section ····················································· 49
8-3. Chassis Section ···························································· 50
8-4. Mechanism Deck Section-1 (CDM64B-K1BD47A) ·· 51
8-5. Mechanism Deck Section-2 (CDM64B-K1BD47A) ·· 52
8-6. Base Unit Section (BU-K1BD47A) ···························· 53

9. ELECTRICAL PARTS LIST ······································· 54

2

HCD-GS200

r

Notes on chip component replacement

•Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam­aged by heat.

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.

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 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 2 V AC range are suitable. (See Fig. A)

To Exposed Metal
Parts on Set

CAUTION

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

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.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.

AC

1.5 k

0.15 µF

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

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 ON 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.

Ω

Earth Ground

voltmete
(0.75 V)

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

3

HCD-GS200

SECTION 1

SERVICING NOTES

CD-TEXT TEST DISC

This unit is able to display the test data (character information)
written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313: J-2501-126-A) is used
for checking the display.
To check, perform the following procedure.

Checking Method:

1. Press the I/1 button to turn the power on, set the disc to the
disc table with the “test disc” label facing right, and chuck the
disc.

2. Press the [CD] button to set CD function, and press the bB button to
playback the disc.

3. The following will be displayed on the liquid crystal display.

Display : 1KHZ/0dB/L R

4. Pressing the [-- ] or [ +] button, select the track. The text
data of each track will be displayed.
For details of the displayed contents for each track, refer to “Table
1: CD-TEXT TEST DISC TEXT Data Contents”.

Restrictions in CD-TEXT Display

In this unit, some special characters will not be displayed properly.
These will be displayed as a space or a character resembling it.

Table 1: CD-TEXT TEST DISC TEXT Data Contents

.>

(TRACKS No. 1 to 20: Normal Characters)

CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP

• In cleaning the objective lens of optical pick-up, be sure the
following below.

2

Remove the
magnet assy.

optical pick-up

bracket (top 60) hole

A

3

Put a cotton bud into
the hole on the bracket
(top 60) and clean the
OP lens.

Note 1. In cleaning the lens, do not apply an excessive force.

As the optical pick-up is vulnerable, application of excessive
force could damage the lens holder.

Note 2. In cleaning, do not use a cleaner other than exclusive cleaning

liquid (KK-91 or isopropyl alcohol).

Note 3. Wipe the objective lens spirally from center toward outside. (See

Figure A)

1

Open the torsion holder
(magnet) in direction of
arrow

A

.

TRACK

No.

1 1kHz/0dB/L&R
2 20Hz/0dB/L&R
3 40Hz/0dB/L&R
4 100Hz/0dB/L&R
5 200Hz/0dB/L&R
6 500Hz/0dB/L&R
7 1kHz/0dB/L&R
8 5kHz/0dB/L&R

9 7kHz/0dB/L&R
10 10kHz/0dB/L&R
11 16kHz/0dB/L&R
12 18kHz/0dB/L&R
13 20kHz/0dB/L&R
14 1kHz/0dB/L&R
15 1kHz/–1dB/L&R
16 1kHz/–3dB/L&R
17 1kHz/–6dB/L&R
18 1kHz/–10dB/L&R
19 1kHz/–20dB/L&R
20 1kHz/–60dB/L&R

Displayed Contents

(Figure A)

Note: Track No. 21 to 99 are not displayed.

4

SECTION 2

GENERAL

HCD-GS200

This section is extracted
from instruction manual.

ALPHABETICAL ORDER

A – O

ALBM +/– 4 (19)
AUDIO IN L/R jacks qk (34)
CD wj (14 – 17, 19, 24)
CD SYNC 0 (24, 25)
CLEAR wa (16, 22, 39)
DISC SELECT qf

(13 – 17, 19, 24)
DISPLAY wl (22, 29, 30, 39)
Display window 2
ENTER ws (15 – 17, 20 – 22, 25,

26, 32)
GAME wd (30)
GAME MIXING w; (31)
KEYBOARD INPUT jack qh

(33 )
MENU wk (16, 17, 20 – 22)

wl
wk
wj
wh
wg
wf
wd
ws
wa

w;
ql
qk

P – Z

PAUSE X 5 (15, 23 – 25)
PHONES jack qg
PLAY MODE/DIRECTION 8

(14 – 17, 23 – 25)

PRESET +/– 4 (20 – 22)
REC z PAUSE/START qs

(24, 25)

REPEAT/FM MODE 9 (15, 22)
STOP x qa (15, 23, 24, 35, 39)
TAPE wg (23)
Tape deck 3
TIMER SELECT 7 (26, 32, 37)
TIMER SET 6 (12, 25, 32)
TUNER/BAND wh (20 – 22)
TUNING +/– 4 (20 – 22)
VIDEO IN jack ql (34)
VIDEO (MD) wf (35, 37)
VOLUME qj

1

2345

BUTTON DESCRIPTIONS

=/1 (power) 1
m (rewind) 4
nN (play) 4
M (fast forward) 4
. (go back) 4
> (go forward) 4
Z PUSH (front cover) qd
Z PUSH (tape deck) 3

6
7
8

9
q;
qa
qs
qd

qf
qg
qh
qj

5

HCD-GS200

ALPHABETICAL ORDER

A – O

ALBM +/ALBM – qd w; (19)
CD wg (14 – 17, 19, 24)
CD SYNC wf (24, 25)
DISC +/DISC – qf ql

(13 – 16, 19)
DISPLAY wh (22, 29, 30)
ENTER 5 (15 – 17, 20 – 22, 25,

26, 32)
GAME 6 (30)
GROOVE qh (26)

P – Z

PLAY MODE 2 (14 – 17, 23)
PRESET EQ qg (27)
PRESET +/PRESET – qs wa

(20 – 22)
REC wd (24)
REPEAT 3 (15)
SLEEP 1 (31)
SURROUND qk (27)
TAPE 7 (23)
TUNER/BAND 8 (20 – 22)
TUNING +/TUNING – qa ws

(20 – 22)
VIDEO (MD) 9 (35, 37)
VOL +/– qj

1234

wh

wg

wf
wd

ws
wa
w;
ql

BUTTON DESCRIPTIONS

@/1 (power) 4
nN (play) 0
X (pause) 0
x (stop) 0
. (go back) wa
m (rewind) ws
M (fast forward) qa
> (go forward) qs

5
6
7
8

9
0
qa
qs

qd
qf

Setting the clock

1

Press =/1 to turn on the system.

2

Press TIMER SET.

3

Press . or > repeatedly to set the
hour.

4

Press ENTER.

5

Press . or > repeatedly to set the
minute.

6

Press ENTER.

To adjust the clock

1 Press TIMER SET.

2 Press . or > repeatedly to select

“CLOCK SET”, then press ENTER.

3 Do the same procedures as step 3 to 6

above.

Notes

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

• You cannot set the clock in Power Saving Mode.

qk

qj

qg

qh

6

• This set can be disassembled in the order shown below.

SET

CABINET TOP

HCD-GS200

SECTION 3

DISASSEMBLY

FRONT CABI ASSY

BACK PANEL ASSY

MAIN BOARD

AMP BOARD

POWER BOARD

HOLDER (LED-S),

BRACKET (MIDDLE-R),

POWER BRACKET

CD MECHANISM DECK

(CDM64B-K1BD47A)

BASE UNIT (BU-K1BD47A),
D.SENSOR (OUT) BOARD,

T. SENSOR BOARD

CASSETTE HOLDER,

MECH

DECK (CMAL1Z221)

BELT

DISPLAY

CD LED BOARD

BU HOLDER ASSY

KEY

BOARD

BOARD

HEADPHONE BOARD,

GAME LINK BOARD

DOOR LED BOARD

D.SENSOR (IN) BOARD,

LOAD SW BOARD,

L.T MOTOR BOARD

CD BOARD

7

HCD-GS200

)

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

3-1. Cabinet Top

5

three screws
(BVTP3

×

8)

8

panel side (L)

6

two screws
(BVTP3

7

×

8)

qd

cabinet top

qs

9

three screws
(BVTP3

3

×

8)

0

wire (flat type) (8 core)
(CN309 )

4

panel side (R)

2

two screws
(BVTP3

×

8

3-2. Front Cabi Assy

7

2

connector 2p (CN705)

8

9

front cabi assy

screw (KTP3 × 8)

qa

connector 8p (CN441)

screw
(BVTP3

×

8)

1

connector 4p (CN503)

4

connector 8p (CN310)

3

wire (flat type) (19 core)
(CN303 )

1

three screws
(BVTP3

×

8)

5

three screws
(BVTP3

×

8)

6

screw (KTP3 × 8)

8

3-3. Back Panel Assy

)

d

1

connector 2p (CN601)

0

back panel assy

3

dc fan (M391)

2

two screws
(BVTP3

×

10)

4

two screws
(BVTP3

5

6

three screws

(BVTP3

7

9

HCD-GS200

×

10)

screw (BVTP3 × 10

×

10)

four screws
(BVTP3

×

8

five screws
(BVTP3

two screws
(BVTP3

10)

×

10)

×

10)

3-4. MAIN Board

6

wire (flat type) (11core)
(CN311)

4

wire (flat type) (29 core)
(CN305)

3

connector 9p (CN307)

2

connector 7p (CN308)

7

MAIN boar

5

connector 8p (CN301)

1

screw (BVTP3 × 8)

9

HCD-GS200

d

3-5. AMP Board

2

screw (BVTP3 × 8)

1

connector 6p (CN502)

3

two screws
(BVTP3

×

8)

4

AMP boar

3-6. POWER Board

3

power, cord

4

POWER board

2

two screws
(BVTP4 × 8)

1

two screws
(BVTP4 × 8)

10

3-7. Holder (LED-S), Bracket (Middle-R), Power Bracket

3

holder (LED-S)

2

screw (BVTP3 × 8)

4

three screws
(BVTP3 × 8)

6

bracket (middle-R)

5

two screws
(BVTP3 × 8)

9

two screws
(BVTP3 × 8)

7

screw
(BVTP3 × 8)

1

screw
(BVTP3 × 8)

0

power bracket

8

three screws
(BVTP3 × 8)

)

HCD-GS200

3-8. CD Mechanism Deck (CDM64B-K1BD47A)

1

screw (M3 × 12)

2

table (60)

lower chassis

7

CD mechanism deck
(CDM64B-K1BD47A)

3

screw
(PSW3

4

two screws
(BVTP3

×

6)

×

8

6

four screws
(BVTP3

×

8)

5

four screws

×

(BVTP3

8)

11

HCD-GS200

3-9. Base Unit (BU-K1BD47A), D.SENSOR (OUT) Board, T.SENSOR Board

4

screw (BVTP3 × 8)

5

D.SENSOR (OUT) board

2

bracket (top 60)

1

three screws
(BVTP3

×

8)

3

base unit
(BU-K1BD47A)

6

three screws
(BVTP3

×

8)

7

T. SENSOR board

3-10. D.SENSOR (IN) Board, LOAD SW Board, L.T MOTOR Board

5

belt

6

belt

3

two screws

4

D.SENSOR (IN) board

(BVTP3

×

8)

*Cautions of an assembly

pulley (60)

motor (60) assy (M442)

motor (60) assy (M441)

9

screw (BVTP3 × 8)

12

1

screw (BVTP3 × 8)

2

brackcet (d-sensor)

8

L.T MOTOR board

7

three screws
(BVTP3

0

LOAD SW board

×

8)

3-11. CD LED Board

)

3

CD LED board

HCD-GS200

Opens to right and left and
CD LED BOARD
is removed upwards
from a slot.

1

2

3-12. BU Holder Assy

5

BU holder assy

1

tension spring (F1)

2

tension spring (F-2)

3

two screws
(PTP2.6

×

8

4

two screws
(PTP2.6

×

8)

13

HCD-GS200

t

3-13. CD Board

1

6

CD board

Remove two
solders.

7

optical pick-up(KSM-213BFN)

5

parallel (FFC) (16 core) wire
(CN102)

4

3-14. Cassette Holder, Mech Deck (CMAL1Z221)

8

cassette holder

7

2

Remove two solders.

3

4

3

screw (P2 × 5)

5

spring cs

14

2

cabinet top

mech

deck (CMAL1Z221)

1

four screws
(BVTP3 × 8)

6

damper

3-15. Belt

r

5

6

ten screws
(BVTP2.6 × 8)

1

knob volume

3

knob jog

4

cover jog

2

nut

front panel assembly

7

connector 2p (CN706)

8

connector 2p

(CN704)

0

DISPLAY board

9

connector 2p (S791)

1

two screws

HCD-GS200

*Cautions of an assembly

fly wheel

dc motor

deck (CMAL1Z221)

mech

2

Remove two
solders.

fly wheel

5

belt

4

belt

3

dc moto

3-16. DISPLAY Board

15

HCD-GS200

)

)

3-17. KEY Board

2

KEY

board

1

two screws
(BVTP2.6

×

8

3-18. HEADPHONE Board, GAME LINK Board

2

decoration panel

5

GAME LINK

board

4

two screws
(BVTP2.6 × 8

16

3

HEADPHONE

board

1

screw
(BVTP2.6 × 8)

3-19. DOOR LED Board

s

1

connector 2p (CN704)

2

CD window

3

two screw
(BVTP2.6)

HCD-GS200

6

CD lid

9

CD holder (A)

0

DOOR LED Board

5

CD window

7

8

4

17

HCD-GS200

SECTION 4

TEST MODE

[Panel Test Mode]

Procedure:

1. Press three buttons of x , [MENU], and [DISPLAY] simulta-
neously.

2. LEDs and fluorescent indicator tube are all turned on.

3. Press the [MENU] button and go to the version display mode.
Press the m button and go to the key and jog test mode.

4. To release from these mode, press three buttons in the same
manner as step 1, or disconnect the power cord.

– Version display mode –

In the version display mode, each time the [MENU] button is
pressed, the display changes in the order of MC, GC, CD, CDD,
CDM A, CDM B, BDA, BDB, ST, TA, TM and TC.
Press the . button to display the date of the software.

– Key and jog test mode –

In the key check mode, the fluorescent indicator tube displays
“K 0 J 0 V 0”. Each time a button is pressed, “K” value in­creases without I/1 and [DISPLAY] buttons. However, once
a button is pressed, it is no longer taken into account.
“J” value increases like 1, 2, 3 ... if turn the [DISC SELECT]
dial clockwise, or it decreases like 0, 9, 8 ... if turn the

[DISC SELECT] dial counterclockwise.

“V” value increases like 1, 2, 3 ... if turn the [VOLUME] knob
clockwise, or it decreases like 0, 9, 8 ... if turn the [VOLUME]
knob counterclockwise.

[Cold Reset]

• The cold reset clears all data including preset data stored in the

RAM to initial conditions. Execute this mode when returning
the set to the customer.

Procedure:

1. Turn the power ON or set to the DEMO mode.

2. Press three buttons of
taneously.

3. The set is reset, and becomes DEMO mode.

x , [CLEAR], and [DISPLAY] simul-

[CD Ship Mode and RAM Initialize]

•This mode moves the optical pick-up to the position durable to

vibration, and initializes the RAM. Use this mode when return­ing the set to the customer after repair.

Procedure:

1. Press the I/1 button to turn the power ON and select the func-
tion CD.

2. Press three buttons of

simultaneously.

3. The set is turn the power off and initializes the RAM auto­matically. A message “LOCK” is displayed on the fluorescent
indicator tube, and the CD delivery mode is set.

[ENTER], [TIMER SELECT], and X

[CD Service Mode]

•This mode can run the CD sled motor optionally. Use this mode,
for instance, when cleaning the optical pick-up.

Procedure:

1. Press the I/1 button to turn the power ON.

2. Select the function “CD”.

3. Press three buttons of [ENTER], M , and

[TIMER SELECT] simultaneously.

4. Set to the Sled Servo mode.

5. With the CD in stop status, press the M button to move the

optical pick-up to outside track and display “SLED OUT”, or
press the m button to move the optical pick-up to inside
track and display “SLED IN”.

6. To exit from this mode, perform as follows.

1) Move the optical pick-up to the most inside track.

2) Press three buttons of x , [CLEAR], and [DISPLAY]
simultaneously. (cold reset)

Notes: •Always move the optical pick-up to most inside track when

exiting from this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can

be chipped.

[VACS Test Mode]

•This mode is used to switch on and off the VACS (Variable At­tenuation Control System).

Procedure:

1. Press the I/1 button to turn the set on.

2. To enter the test mode, press the two buttons [ENTER] and

[TIMER SELECT] simultaneously.

3. The message “VACS OFF” or “VACS ON” appears.

4. To exit from this mode, press the I/1 button to turn the set

off.

[Function Selection Mode]

•This mode is used to select the input VIDEO or input MD.

Procedure:

1. Turn off the set.

2. Press the two buttons x and [VIDEO $MD%] simultaneously.

3. The message “VIDEO” or “MD” appears.

4. To exit from this mode, press the I/1 button to turn the set

off.

[AM Channel Step 9 kHz/10 kHz Selection Mode]

•The AM tuning interval can be changed over 9 kHz or 10 kHz.

Procedure:

1. Press the I/1 button to turn the power on.

2. Select the function “TUNER”, and press the [TUNER/BAND]
button to select the BAND “AM”.

3. Press the I/1 button to turn the power off.

4. Press the [ENTER] and I/1 buttons simultaneously.

5. Either the message “AM 9k STEP” or “AM 10k STEP” ap­pears, and thus the channel step is changed over.

18

SECTION 5

MECHANICAL ADJUSTMENTS

HCD-GS200

SECTION 6

ELECTRICAL ADJUSTMENTS

• TAPE MECHANISM DECK SECTION

Precaution

1. Clean the following parts with a denatured alcohol-moistened
swab:

record/playback heads pinch rollers
erase head rubber belts
capstan idlers

2. Demagnetize the record/playback head with a head demagne­tizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the
parts adjusted.

5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.

Torque Measurement

Mode

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

Torque meter

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

Meter reading

2.94 mN • m to 7.84 mN • m
31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.14 mN • m to 0.59 mN • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

2.94 mN • m to 7.84 mN • m
31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.14 mN • m to 0.59 mN • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

6.86 mN • m to 17.64 mN • m
71 to 143 g • cm

(0.98 – 1.99 oz • inch)

more than 0.98 N • m

100 g or more

(3.53 oz or more)

more than 0.98 N • m

100 g or more

(3.53 oz or more)

DECK SECTION

Precaution

1. Demagnetize the record/playback head with a head demagne­tizer.

2. Do not use a magnetized screwdriver for the adjustments.

3. After the adjustments, apply suitable locking compound to the
parts adjust.

4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in
this service manual. (As a general rule, playback circuit ad­justment should be completed before performing recording
circuit adjustment.)

6. The adjustments should be performed for both L-CH and R­CH.

7. Switches and controls should be set as follows unless other­wise specified.

•Test Tape

Tape Signal Used for

P-4-A100 10 kHz, – 10 dB Azimuth Adjustment

WS-48B 3 kHz, 0 dB Tape Speed Check

0 dB = 0.775 V

19

HCD-GS200

)

Record/Playback Head Azimuth Adjustment

Procedure:

1. Mode: Playback (FWD)

test tape
P-4-A100
(10 kHz, – 10 dB)

AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH

level meter

set

+
–

2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.

Output
level

within
1dB

L-CH
peak

R-CH
peak

within
1dB

Screw
position

L-CH
peak

Screw
position

R-CH
peak

3. Mode: Playback

Adjustment Location:Record/Playback/Erase Head

Head azimuth
adjustment screw

Tape Speed Check

Mode: Playback

test tape
WS-48B
(3 kHz, 0 dB)

set

frequency counter

+
–

AMP board
test tape
P-4-A100
(10 kHz, – 10 dB)

L-CH

set

R-CH

in phase 45° 90° 135° 180°

FRONT SPEAKER terminal (J501

L-CH

R-CH

waveform of oscilloscope

good

oscilloscope

V

wrong

H

4. Reapeat step 1 to 3 in playback (REV) mode.

5. After the adjustments, apply suitable locking compound to the
parts adjusted.

AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH

1. Insert the WS-48B into the deck.

2. Press the bB button on the deck.

3. Confirm that the frequency counter reads 3,000 ± 90 Hz.

Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)

(WS-48B)

20