Sony HCD-G101 User manual

— 1 —
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
HCD-G101 is the tuner, deck, CD
and amplifier section in MHC-G101.
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-G101
DECK-A
DECK-B
SPECIFICATIONS
TAPE
DECK
SECTION Tape Transport
Mechanism Type
Ver 1.1 2002.03
With CORRECTION-1
(9-960-869-91)
9-960-869-12
2002C0200-1
© 2002.03
Sony Corporation
Home Audio Company
Pubulished by Sony Engineering Corporation

— 2 —
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
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 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.
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LESCOMPOSANTSIDENTIFIÉSPAR UNE MARQUE!SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT.NE REMPLACER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS PAR SONY.
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 PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
SERVICING NOTE
NOTES ON HANDLINGTHE 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 pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.

— 3 —
TABLE OF CONTENTS
1. GENERAL .......................................................................... 4
2. DISASSEMBLY
2-1. CD Door ............................................................................... 5
2-2. CD Mechanism Deck ............................................................ 5
2-3. Front Panel and Main Board ................................................. 6
2-4. Main Board and H/P Board................................................... 6
2-5. CD Tray ............................................................................... 7
2-6. CD Decoder Board................................................................ 7
2-7. Base Unit ............................................................................. 8
3. MECHANICAL ADJUSTMENTS ................................ 9
4. ELECTRICAL ADJUSTMENTS ................................. 9
5. DIAGRAMS
5-1. Circuit Boards Location ...................................................... 14
5-2. Brock Diagrams
• Tuner Section ................................................................... 15
• CD Section ....................................................................... 17
• Deck Section .................................................................... 19
• Main Section .................................................................... 21
• Power Section .................................................................. 23
5-3. IC Brock Diagrams ............................................................. 25
5-4. Printed Wiring Board —Main Section —........................... 30
5-5. Schematic Diagram — Main Section — ............................ 35
5-6. Schematic Diagram —Panel Section — ............................. 39
5-7. Printed Wiring Board —Panel Section — .......................... 43
5-8. Printed Wiring Board — CD Section —............................. 47
5-9. Schematic Diagram —CD Section — ................................ 51
5-10. IC Pin Function ................................................................ 54
6. EXPLODED VIEWS
6-1. Top and Bottom Cabinet Section ........................................ 56
6-2. Front Panel Section ............................................................. 57
6-3. Cassette Mechanism Deck Section 1 .................................. 58
6-4. Cassette Mechanism Deck Section 2 .................................. 59
6-5. CD Mechanism Deck Section 1 ..........................................60
6-6. CD Mechanism Deck Section 2 ..........................................61
6-7. Base Unit Section (KSM-213BCM) ................................... 62
7. ELECTRICAL PARTS LIST ........................................ 63
To Exposed Metal
Parts on Set
0.15µF 1.5k
Ω
AC
voltmeter
(0.75V)
Earth Ground
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety checks before releasing the set to the customer:
Checktheantenna terminals, metal trim, “metallized” knobs,screws,
and all other exposed metal parts forAC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth Ground and
from all exposed metal parts to any exposed metal part having a
returnto chassis, must notexceed 0.5 mA (500microampers).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 aVOM
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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.

— 4 —
SECTION 1
GENERAL
Location of Parts and Controls
6
5
42
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
1Disc tray
2DISC 1 button
3DISC 2 button
4DISC 3 button
5DISC SKIP button
6§OPEN/CLOSE button
7DBFB button
8VOLUME knob
9Display 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
!™
!£ !¡
!¢ !º 987
!∞ !§ !¶ !• !ª@º@¡ @™ @•@§ @∞
@¢@£
@¶
@ª
#º#¡

— 5 —
SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
2-1. CD DOOR
2-2. CD MECHANISM DECK
CD door
1 Two screws (B3x8)
2 Screw
(BVTP3x10)
3 Screw
(BVTP3x10)
4 Two screws
(BVTP3x10)
5 Flat type wire (21 core)
(CN09)
6 Harness
(Main board: CN302)
7 CD mechanism deck
1 Pull out the CD tray and remove the
CD door with releasing claws into the
direction of arrow.
craws

— 6 —
2-3. FRONT PANEL AND MAIN BOARD
2-4. MAIN BOARD AND H/P BOARD
1 Harness
(CN204)
2 Connector
(CN203)
3 Connector
(CN206)
4 Connector
(CN201)
5 Screw
(BVTP3x8)
6 Screw (BVTT3x6)
7 Screw
(BVTT3x6)
8 Screw (PTPWH3x10)
9 Main board
0 H/P board
2 Connector
(CN401)
6 Screw
(BVTP3x10)
4 Two screws
(BVTP3x10)
5 Two screws
(BVTP3x10)
3 Screw (BVTP3x8)
7 Screw
(BVTP3x10)
9 Front panel and
Main board
1 Three screws
(BVTP3x10)
8 Screw
(BVTP3x10)
POWER CORD
HOW TO SET THE
POWER CORD

— 7 —
2-5. CDTRAY
1 Screw (BVTP3x10)
2 Bracket
3 Screw (BVTP3x10)
4 Bracket
5 CD tray
2-6. CD DECODER BOARD
1 Two screws (BVTP3x6)
2 Two screws
(BVTP3x10)
3 Two claws
4 Flat type wire (CN06)
5 Connector (CN05)
6 Flat type wire
(CN01)
7 CD decoder board

— 8 —
2-7. BASE UNIT
1 Screw
(PTPWH2.6x8)
2 UD-cam
4 Base unit
Note: When installing, set to
the groove of UD-cam.
3 Two screws

— 9 —
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 demagne-
tizer.
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 sup-
ply voltage unless otherwise noted.
Torque Measurement
SECTION 3
MECHANICAL ADJUSTMENTS SECTION 4
ELECTRICAL ADJUSTMENTS
DECK SECTION 0 dB=0.775V
1. Demagnetizetherecord/playback head with a head damagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjusted.
4. The adjustments should be performed with the rated power sup-
ply 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 R-
CH.
Used for
10 kHz, –10 dB
3 kHz, 0 dB
Azimuth Adjustment
Tape Speed Adjustment
Tape
P-4-A100
WS-48B
Signal
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1. Mode : Playback
test tape
P-4-A100
(10kHz, –10dB)
set
SPEAKER
terminal (JK302)
level meter
+
–
FWD
FWD
back tension 1 to 5 g • cm
(0.01 - 0.07 oz • inch)
FF/REW
40 to 70 g • cm
(0.56 - 0.97 oz • inch)
Torque Torque meter Meter reading
CQ-102C
CQ-102C
CQ-201B 55 to 140 g • cm
(0.76 - 1.94 oz • inch)

— 10 —
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 2 dB of peak.
3. Mode: Playback
good
R
L-CH
peak
R-CH
peak
output
level
screw
position
within 2dB
L-CH
peak R-CH peak
screw
position
test tape
P-4-A100
(10kHz, –10dB) SPEKER
terminal (JK302)
(L-CH)
set
L
oscilloscope
SPEKER
terminal (JK302)
(R-CH)
Waveform of oscilloscope
wrong
in phase 45˚ 90˚ 135˚ 180˚
within
2dB
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location:
Adjustment screws
REC/PB head (deck A)
or PB head (deck B)
test tape
WS-48B
(3kHz, 0dB)
set
SPEAKER
terminal (JK302)
frequency counter
+
Tape Speed Adjustment (Deck A)
Procedure:
1. Mode: Playback
–
2. Adjust the SFR201 so that the frequency counter reads 3,000 Hz
± 90Hz.
Adjustment Location: MAIN board
Sample Value of Wow and flutter
W. RMS (JIS) within 0.3%
(test tape: WS-48B)
[MAIN BOARD] — Component side —
SFR201
Tape Speed
CN204

— 11 —
TUNER SECTION 0 dB=1µV
AMTuning Voltage Adjustment
Procedure:
1. Set the reception frequency of the unit to 530 kHz.
2. Adjust L105 for 1.2 ± 0.05 V reading on the DC voltmeter.
3. Set the reception frequency of the unit to 1,710 kHz.
4. Confirm that the voltage reading on the DC voltmeter is within
8.0 ± 0.5 V.
Adjustment Location: MAIN board
AMTracking Adjustment
Procedure:
1. Tune the set to 600 kHz.
2. Set the output of AM RF SSG so that the input level of the set
will become 60 dB (µV/m).
3. Adjust L104 so that when the waveform on the oscilloscope is
maximum, no noise appears.
4. Tune the set to 1,400 kHz.
5. Adjust TC102 so that when the waveform on the oscilloscope is
maximum, no noise appears.
• Repeat the procedures in each adjustment several times, and the
tracking adjustment should be finally done by the trimmer
capacitors.
Adjustment Location: MAIN board
FMTuning Voltage Adjustment
DC voltmeter
+
–
Procedure :
1. Set the reception frequency of the unit to 87.5 MHz.
2. Adjust L103 for 1.2 ± 0.05V reading on the DC voltmeter.
3. Set the reception frequency of the unit to 108 MHz.
4. Confirm that the voltage reading on the DC voltmeter is within
7.8 ± 0.5V.
Adjustment Location: MAIN board
+
–
DC voltmeter
TP1
Main board
IF
G
VT
set
loop antenna
AM RF SSG
60cm
Field strength dB (µV/m) = SSG output level dB (µV/m) –26dB.
30% amplitude
modulation by
400Hz signal
Center of
Bar antenna (L104)
TP1
Main board
IF
G
VT

— 12 —
FMTuned Level Adjustment
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75
Ω open)
FM RF SSG
set
75
Ω coaxial
FM ANTENNA terminal
(JK101)
Procedure:
1. Supply a 28 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust SFR101 to the point (moment) when the TUNED indica-
tor will change from going off to going on.
Adjustment Location: MAIN board
FM RF SSG oscilloscope
FM ANTENNA terminal (JK101) SPEAKER terminal (JK302)
set
Carrier frequency : 90 MHz, 106 MHz
Modulation : AUDIO 1kHz, 75kHz deviation (100%)
Output level : 20 dB (at 75
Ω open)
+
–
FMTracking Adjustment
Procedure:
1. Tune the set to 90 MHz.
2. Adjust L102 so that when the waveform on the oscilloscope is
maximum, no noise appears.
3. Tune the set to 106 MHz.
4. Adjust TC101 so that when the waveform on the oscilloscope is
maximum, no noise appears.
• Repeat the procedures in each adjustment several times, and the
tracking adjustment should be finally done by the trimmer
capacitors.
Adjustment Location: MAIN board
Adjustment Location
[MAIN BOARD] — Component side —
FM Tuning Voltage
JK101
FM Tracking
AM Tuning Voltage
SFR101
FM Tuned Level
AM Tracking
TC101
TC102
L105
L104
L103
L102
IC103
JK302
IC102
TP1
IF
GND
VT

— 13 —
CD SECTION
Note:
1. CD Block is basicallyconstructed to operate without adjustment.
Therefore, check each item in order given.
2. UseYEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the fol-
lowing checks.
5. Adjust the focus bias adjustment when optical block is replaced.
Focus Bias Adjustment
RF Level Check
Procedure :
1. Connect oscilloscope to test point TP (RF) on CD DECODER
board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
Note: Clear RF signal waveform means that the shape “◊” can be
clearly distinguished at the center of the waveform.
TP (RF)
CN12 (VC)
CD DECODER
board oscilloscope
level: 1.0 Vp-p
VOLT/DIV: 200 mV
TIME/DIV: 500 nS
+0.3
–0.2
Adjustment Location: CD DECODER board
FEO
VC –
+
Procedure:
1. Connect DC voltmeter to test point CN12 (FEO), (VC) on CD
DECODER board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in and stop.
4. Adjust VR01 so that the DC voitmeter reading is 0 ± 20 mV.
Adjustment Location: CD DECODER board
CD DECODER
board
CN12
DC voltmeter
R07
VR01
Focus Bias
Focus Gain
VR02
Focus Gain Adjustment (VR02)
This gain has a margin, so even if it is slightly off.
There is no problem.
Therfore, do not perform this adjusment.
Please note that it should be fixed to mechanical center position
when you moved and do not know original position.
Adjustment Location
[CD DECODER BOARD] — Component side —
CN12
IC03
RF Level
IC01
FEO
VC

— 14 —
SECTION 5
DIAGRAMS
5-1. CIRCUIT BOARDS LOCATION
MAIN Board
DISC board
PANEL board
H/P board
SENSOR board
POWER TRANSFORMER board
SW (B) board
SW (C) board
MOTOR board
SW (D) board
SW (A) board
CD DECODER board
MOTOR (6P) (S) board
R/P SW board

— 15 — — 16 —
5-2. BLOCK DIAGRAMS
—TUNER SECTION —
HCD-G101
FM
75 OHM
JK101
FM ANTENNA L101 1 6
3 8
RF IN IF
FRONT
END
IC101
MIX IN OSC
T101
TC101,L102
TC101 L102
FM TRACKING
D103
D101
D104
FM OSC
AMP
Q102
L103
FM TUNING
VOLTAGE
TP1
(1/2)
VT
GAM TUNING
VOLTAGE
FM TUNING
VOLTAGE
TP1 (1/2)
TC102
L104
MW
BAR ANTENNA
L.P.F
Q105,106
21 1 24
X101
7.2MHz
17
Q103
B+ B+
19
L103
FM IF
AMP
Q101 1 FM IF
CF102
10.7MHz
CF101
10.7MHz
AM TUNING
VOLTAGE
L105
L105 23
24
21
22
18
FM
TUNED
LEVEL
SFR101
6 10
7 15 16 12 13
20 11 12 13
14 23 4
8
CF104
10.7MHz
17 CF105
19kHz
16
18 IF
GTP1
(2/2)
7
2
T102
4
DI
CLK
CE
TU MUTE
TUNED
DO 1
ST/IN
14
15
AM IF
L OUT
R OUT
TU L
REC OUT
R CH
FM DET
MPX VCO
MPX IN
AF DET
ST IND
AM MIX
PL DET
PH DET
PH DET
SMET
AM/FM
TU LED
OSC
AFC
AM RF
OSC/FMSD
A
MAIN
SECTION
CE
DI
CLK
DO
FM ST
AM/FM
SD SPEED
L CTR
H CTR
SD/IN
AM IN
FM IN
FM B+
X OUT
X IN
PD 1
09
FM/AM MPX
IC102
• R CH is omitted
• Signal path
: FM
: AM
5
PLL
IC103
(Page 21)
TC102, L104
AM TRACKING
TUNED
SWITCH
Q107
REC MUTE
Q108,109
CF103

— 17 — — 18 —
— CD SECTION —
HCD-G101
B+
4
1
2
5
6
10
DETECTOR
LASER DIODE
PD LD APC
Q01
LD ON
Q02
33
34
39
38
35
36 PD1 PD2 31RF 0
FOCUS/TRACKING
SERVO, RF AMP
IC01 (1/2)
19
20
21
23
24
25
22
40
EI VR02
VC
42TEO CN2
6
7
13
12
48
45
1
37
VC
2
1
CN12
FOCUS
TRACKING
RF LEVEL
VR01
TRACKING
COIL
DRIVE
VO3(+) 25
VO3(-)
18
17
FOCUS
COIL DRIVE
15
16 27
VIN4
VIN3
VO4(+)
VO4(-)
TRACKING
COIL
FOCUS
COIL
2-AXIS
DEVICE
FOCUS/TRACKING
COIL DRIVE,
SPINDLE/SLED
MOTOR DRIVE
IC03
SLED MOTOR
DRIVE 6
12
11
•
SPINDLE
MOTOR
DRIVE
13
14
•
M
M
M102
SLED
MOTOR
M101
SPINDLE
MOTOR 4
16
15 14
SLED SERVO
IC01 (2/2)
SL O
SL M SL P
24 OP
OUT 23IN -
9MUTE
22
8
23
14
13
15
16
17
36 RF DIGITAL
PLL EFM DEMODULATOR DIGITAL
FILTER
+
1BIT
DAC
NLPWM
LPWM
RPWM
NRPWM
DATA
SQCK
CLOK
SCOR
SQSO
SENS
70
69
78
77 R CH
D/A
INTERFACE
SERVO
AUTO
SEQUENCER
9
5
11
4
1
7
10
SUB CODE
PROCESSOR
CPU
INTERFACE
DIGITAL
CLV CLOCK GENERATOR
6
18
25 74 73
XLT01
33.8688MHz
S05
LIMIT
SWITCH
SPOA
2
6
7
4
TURN TABLE
MOTOR DRIVE
Q10,11,14,15
11
TURN TABLE
MOTOR DRIVE
CONTROL
8
9
TRAY MOTOR
DRIVER
Q06 - Q09
5
13
14
15
3
10
CONTROL
MUTE
E
POWER
SECTION
S01
OPTICAL PICK-UP
UP/DOWN DET
UP DOWN
TRAY/TABLE
MOTOR
DRIVER,
REG CONTROL
IC02
+
-CD L
DATA
SQCK
SQSO
SCOR
SENS
XLAT
COUNT
FOK
DI
CLK
STB
B. BOOST
UP
DOWN
C
MAIN
SECTION
MIX AMP
IC05
DIGITAL SIGNAL PROCESSOR, D/A CONVERTER, DIGITAL FILTER
IC04
CLKO
XLTO
DATO
SEIN
CNIN
FOK
XLON
XRST
MDP
XTA0
XTA1
MUTE
M
M
M103
TURN
TABLE
MOTOR
M104
TRAY
MOTOR
T.T+
T.T-
DOWN
TRAY +
TRAY -
XRST
MUTE
B.BOOST
DATA I
CLOK
STB
CONTROL
UP
E
F
LD
PD
VC
ATSC
FEO
FEBIAS TA M
TA O
FE M
FE O
XRST
FOK
C. OUT
SENS
DATA
XLT
CLK
OPTICAL PICK-UP BLOCK
A
C
B
D
E
F
7
VO2(+)
VO2(-)
VO1(+)
VO1(-)
VIN2
VIN1
••
Q13
• R CH is omitted
• Signal path
: CD
09
FOCUS
TRACKING
FOCUS
GAIN
XLAT
(Page 21)
(Page 23)

— 19 — — 20 —
— DECK SECTION —
HCD-G101
R CH
R CH
CH1/A
CH1/B
NF -
+PRE
OUT
BIAS OSC COIL
L201
R CH
R CH
BIAS
OSC
Q218
REC/PB
CONTROL
Q203,205
REC/PB
CONTROL
DRIVE
Q207
REC/PB
CONTROL
Q201
Q211
A/B
PREOUT R CH
TAPE A/TAPE B
+
-
REC IN
NF
REC
OUT
REC/PB
EQ AMP
IC201
REC SWITCH
DRIVE
Q217
MUTE
SWITCH
Q216
MUTE
Q209
D205
+
Q220
D204
TAPE A
SWITCH
Q214
SW201
REC/PLAY
SWITCH
PLAY
REC
TAPE A/B
SWITCH
Q213
D201
D203
D202
D210
D211
B +
D207D206
M
SFR201
TAPE SPEED M901
REEL/CAPSTAN
MOTOR
S203
PLAY SWITCH
(DECK B)
S202
PLAY SWITCH
(DECK A)
S201
REC SWITCH
(DECK A)
GROUND
SWITCH
Q219
B +
REC L
CD SYNC
PB L
D208
09
D209
B
MAIN
SECTION
DECK B
HP901
PB HEAD
DECK A
HRP901
REC/PB
HEAD
HE901
ERASE
HEAD
• R CH is omitted
• Signal path
: PB (DECK A)
: PB (DECK B)
: REC (DECK A)
3
1
2
5
20
911
10
19
(Page 21)

HCD-G101
— 21 — — 22 —
— MAIN SECTION —
11
9
12
10
3
CONTROL ELECTRICAL
VOLUME 1
2
LT
IN
LVR
OUT
SELECTOR
IC301 LT
OUT
L2
L4
L1
L3
1514 16
CLK
DI
CE
CL
DI
CE
Q301
18 19 16
BASS BOOST
SWITCH
Q307
BASS BOOST
DRIVE SWITCH
Q308
LED
DRIVER
Q605
DBFB
LED601
MUTE
Q309
MUTE
Q604
MUTE
Q311
RELAY
DRIVE
Q401
MUTE
SWITCH
Q603
PWR
P. ON/OFF
D
POWER
SECTION
POWER DOWN
DET
Q601
B+
RESET
SWITCH
Q602
B+
68555352
RESET
POWER DOWN IN
POWER OUT
SYSTEM MUTE OUT
DI CLK
CE
64 65 66
D105,108
DI
CLK
B. BOOST
MUTE
CD L
CD SYNC
SQSO
SCOR
SENS
XLAT
COUNT
FOK
STB
UP
DOWN
SQCK
DATA 39
40
45
62
67
37
38
60
44
43
41 SQSO
SCOR
SENS
XLAT
COUNT
FOK
STB
DI2
GFS
SQCK/MODE SW IN
DATA
PB L
REC L
C
CD
SECTION
B
DECK
SECTION
DO 1
ST/IN
TU MUTE
TUNED
CE
CLK
DI
TU L
REC OUT
A
TUNER
SECTION
13 - 15
1 - 3 15
10
•
7
A - C Y0
Y5
•
Y7
5G2
SELECTOR
IC602
KEY
MATRIX
29 - 32 • 34 69 - 80 • 1 - 12 21 - 24
LCD DISPLAY
LCD601
59 58
X601
4.19MHz
X2
X1
COM 0 COM 3
S00 S23
KI 0 KI 4
KO A KO C
42
2
REMOTE
CONTROL RECEIVER
RM601
49 48
S02
OPEN/CLOSE
DET
46 47
S03
TURN TABLE
POSITION DET
S04
TURN TABLE
OPERATION DET
TRAY CLOSE SW
TRAY OPEN SW
DISC COUNT SW
TURN TABLE SW
36 63 61
SYC.REC IN
TAPE REC OUT
DI1
FM ST IN
TU MUTE OUT
TUNED
DO
CLK
CE
SYSTEM CONTROLLER, LCD DRIVER
IC601
REM. IN
JK302
SPEAKER
R-CH
JK303
PHONES
• R CH is omitted.
• Signal path
: FM
: PB
: REC
: CD
(Page 16)
(Page 20)
(Page 18)
(Page 23)
CD SYNCHRO SWITCH
Q208
LINE AMP
Q305
D413,414
15 11
POWER AMP
IC303
09

— 23 —
— POWER SECTION —
HCD-G101
+7.6V REG
Q406
+11.5V REG
Q405 RECT Q407-Q410
+5.6V REG
Q407
+7.6V
+5V
+5.6V
PT302
POWER
TRANSFORMER
AC
IN
5 2 1
643
+5V REG
Q05
REG CONTROL
Q04
+10.4V REG
Q408 +11.4V REG Q404
S401
RELAY
POWER ON/OFF
SWITCH
Q402
+10.4V
RECT
D411
+43.5V09
P.ON/OFF
PWR
CONTROL
MUTE
D
MAIN
SECTION
(Page 22)
E
CD
SECTION
(Page 18)

— 24 —