Sony HCD-GS100 - Mini Hi-fi Component System User manual

HCD-GS100
US Model SERVICE MANUAL
COMPACT DISC DECK RECEIVER
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-873-554-03
2003J16-1
© 2003.10
HCD-GS100 is the Amplifier, CD player, Tape
Deck and Tuner section in MHC-GS100.
SPECIFICATIONS
Ver 1.2 2003. 10
Model Name Using Similar Mechanism NEW
CD CD Mechanism Type CDM64B-K1BD44B
Section Base Unit Name BU-K1BD44B
Optical Pick-up Name KSM-213BFN
TAPE Model Name Using Similar Mechanism NEW
Section Tape Transport Mechanism Type CMAL5Z2
Amplifier section
U.S.A. model:
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 6 ohms loads both channels driven, from
120 – 10,000 Hz; rated 50 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
Continuous RMS power output
50 + 50 watts
(6 ohms at 1 kHz,
10% THD)
Total harmonic distortion less than 0.09%
(6 ohms at 1 kHz,
30 watts)
Inputs
VIDEO (MD) (phono jacks):
voltage 250 mV/450 mV,
impedance 47 kilohms
Outputs
PHONES (stereo phone jack):
accepts headphones of
8 ohms or more
SPEAKER: accepts impedance of 6 to
16 ohms
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ = 780 nm)
Emission duration:
continuous
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
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 40 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range 530 – 1,710 kHz
(with the interval set at
10 kHz)
531 – 1,710 kHz
(with the interval set at
9 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
Speaker
Speaker system 3-way, bass-reflex type
Speaker units
Woofer: 13 cm, cone type
Tweeter: 5 cm, cone type
Super Tweeter: 2 cm, dome type
Nominal impedance 6 ohms
Dimensions (w/h/d) Approx. 210 ×325 ×
241 mm
Mass Approx. 2.8 kg net per
speaker
— Continued on next page —

2
HCD-GS100
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-K1BD44B) ············ 11
3-9. Base Unit (BU-K1BD44B),
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.OP Base Assy (KSM-213BFN) ··································· 14
3-15.Cassette Holder, Mech Deck (CMAL5Z2) ················· 15
3-16.Belt ·············································································· 15
3-17.DISPLAY Board·························································· 16
3-18.KEY Board ·································································· 16
3-19.HEADPHONE 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 DECK Section – ······························ 25
– AMP Section – ························································· 26
– DISPLAY/POWER Supply 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. EXPLODEDVIEWS
8-1. General Section ··························································· 48
8-2. Front Panel Section ····················································· 49
8-3. Chassis Section ···························································· 50
8-4. Mechanism Deck Section (CDM64B-K1BD44B) ······ 51
8-5. Base Unit Section (BU-K1BD44B) ···························· 52
9. ELECTRICAL PARTS LIST ······································· 53
TABLE OF CONTENTS
General
Power requirements: 120 V AC, 60 Hz
Power consumption: 100 watts
Dimensions (w/h/d) incl. projecting parts and
controls: Approx. 280 ×325 ×
465 mm
Mass : Approx. 8.8 kg
Supplied accessories: Remote commander (1)
Batteries (2)
AM loop antenna (1)
FM lead antenna (1)
Design and specifications are subject to change
without notice.

3
HCD-GS100
SAFETY-RELATED COMPONENTWARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINEWITH
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.
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µ FAC
voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety check before releasing the set to the customer:
Checktheantennaterminals, metal trim,“metallized”knobs,screws,
and all other exposed metal parts forAC 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 voltagedrop across a resistor bymeansofaVOM
or battery-operatedAC 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
passiveVOM that is suitable. Nearly all battery operated digital
multimeters that have a 2VAC range are suitable. (See Fig.A)
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.
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 pick-
up 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“Scurve check”in“CDsectionadjustment” and check
that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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.
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.

4
HCD-GS100 SECTION 1
SERVICING NOTES
CD-TEXTTEST 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/1button 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 Nbutton 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.
Fordetailsof the displayed contentsforeachtrack,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)
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
TRACK
No. Displayed Contents
Note: Track No. 21 to 99 are not displayed.
.>
CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP
•In cleaning the objective lens of optical pick-up, be sure the
following below.
(Figure A)
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)
2 Remove the
magnet assy.
1 Open the torsion holder
(magnet) in direction of
arrow
A .
A
optical pick-up
bracket (top 60) hole
3 Put a cotton bud into
the hole on the bracket
(top 60) and clean the
OP lens.

5
HCD-GS100
SECTION 2
GENERAL This section is extracted
from instruction manual.
ALPHABETICAL ORDER
A – Q
CD wa
CLEAR qh
DISC SELECT qg
DISPLAY wd
Display window 2
ENTERqj
MENU ws
PAUSE X5
PHONES jack qd
PLAY MODE 8
PRESET +/–4
List of Button Locations and Reference Pages
Main unit
R – Z
REC zPAUSE/START qa
REPEAT/FM MODE9
STOP x0
TAPE ql
Tape deck 3
TIMER SELECT7
TIMER SET 6
TUNER/BAND w;
TUNING +/–4
VIDEO (MD) qk
VOLUME qf
BUTTON DESCRIPTIONS
=/1 (power) 1
m(rewind) 4
N(play) 4
M(fast forward) 4
.(go back) 4
>(go forward) 4
ZPUSH (front cover) qs
ZPUSH (tape deck) 3
1
wd
ws
wa
w;
ql
qk
qj
qh
2345
6
7
8
9
0
qa
qs
qd
qf
qg

6
HCD-GS100
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
Notes for the supplied
remote
* The GAME button and the
ALBM –/ALBM + buttons are
not available.
**The tape deck does not play the
reverse side.
Remote Control
ALPHABETICAL ORDER
A –Q
ALBM +/ALBM –* qd w;
CD wg
CD SYNC wf
DISC +/DISC –qf ql
DISPLAY wh
ENTER 5
GAME* 6
GROOVE qh
PLAY MODE 2
PRESET +/PRESET –qs wa
PRESET EQ qg
R –Z
REC wd
REPEAT 3
SLEEP 1
SURROUND qk
TAPE 7
TUNER/BAND 8
TUNING +/TUNING –qa ws
VIDEO (MD) 9
VOL +/–qj
6
7
8
9
5
qf
qg
qh
0
qd
qa
qs
ql
qk
qj
w;
1234
wa
ws
wd
wh
wg
wf

7
HCD-GS100
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
• This set can be disassembled in the order shown below.
3-1. CABINET TOP
(Page 8)
3-2. FRONT CABI ASSY
(Page 8)
3-3. BACK PANEL ASSY
(Page 9)
3-15
CASSETTE HOLDER,
MECH DECK (CMAL5Z2)
(Page 15)
SET
3-4. MAIN BOARD
(Page 9)
3-5. AMP BOARD
(Page 10)
3-6. POWER BOARD
(Page 10)
3-16. BELT
(Page 15)
3-17. DISPLAY BOARD
(Page 16)
3-18. KEY BOARD
(Page 16)
3-19. HEADPHONE BOARD
(Page 17)
3-11. CD LED BOARD
(Page 13)
3-7. HOLDER (LED-S),
BRACKET (MIDDLE-R),
POWER BRACKET
(Page 11)
3-8. CD MECHANISM DECK
(CDM64B-K1BD44B)
(Page 11)
3-12. BU HOLDER ASSY
(Page 13)
3-14. OP BASE ASSY
(KSM-213BFN)
(Page 14)
3-13. CD BOARD
(Page 14)
3-9. BASE UNIT (BU-K1BD44B),
D.SENSOR (OUT) BOARD,
T.SENSOR BOARD
(Page 12)
3-10. D.SENSOR (IN) BOARD,
LOAD SW BOARD,
L.T MOTOR BOARD
(Page 12)

8
HCD-GS100
3-2. Front Cabi Assy
3-1. CabinetTop
9three screws
(BVTP3 ×8)
qs
5three screws
(BVTP3 ×8)
7
1three screws
(BVTP3 ×8)
2two screws
(BVTP3 ×8)
6two screws
(BVTP3 ×8)
4panel side (R)
8panel side (L)
3
qd cabinet top
qa connector 8p (CN441)
0wire (flat type) (7 core)
(CN309 )
1 connector 4p (CN503)
2 connector 2p (CN705)
5screw (KTP3 ×8)
4three screws
(BVTP3 ×8)
6screw (KTP3 ×8)
7front cabi assy
3wire (flat type) (19 core)
(CN303 )

9
HCD-GS100
3-4. MAIN Board
3-3. Back Panel Assy
2two screws
(BVTP3 ×10) 4four screws
(BVTP3 ×10)
5screw (BVTP3 ×10
)
3dc fan (M391)
1
connector 2p (CN705)
6screw (BVTP3 ×10)
0screw (BVTP3 ×10)
7two screws
(BVTP3 ×10)
9two screws
(BVTP3 ×10)
qa back panel assy
8five screws
(BVTP3 ×10)
1screw (BVTP3 ×8)
2
connector 7p (CN308)
7 MAIN boar
d
5 connector 8p (CN301)
3 connector 9p (CN307)
4wire (flat type) (21 core)
(CN312)
6wire (flat type) (11 core)
(CN311)

10
HCD-GS100
3-6. POWER Board
3-5. AMP Board
4POWER board
2two screws
(BVTP4 ×8)
1two screws
(BVTP4 ×8)
3power, cord
2screw (BVTP3 ×8)
3two screws
(BVTP3 ×8)
4AMP boar
d
1 connector 6p (CN502)