HCD-GRX2/RX33 is the tuner, deck, CD
and amplifier section in MHC-GRX2/RX33.
Photo : HCD-GRX2
Model Name Using Similar MechanismHCD-G101
CD
SECTION
TAPE
DECK
SECTION
CD Mechanism TypeCX3
Base Unit TypeKSM-213BCM
Optical Pick-up TypeKSS-213B/S-N
Model Name Using Similar MechanismHCD-G101
Tape Transport
Mechanism Type
US Model
Canadian Model
HCD-RX33
E Model
Australian Model
HCD-GRX2
DECK-ATK20FX-SW943-800
DECK-BTK20FX-SW943-800
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS:
(U.S.A. model only)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
with 6 Ω loads both channels driven, from 70 – 20,000 Hz; rated 25 W per
channel minimum RMS power, with no more than 0.9% total harmonic
distortion from 250 mW to rated output.
Amplifier section
North American model
Continuous RMS power output
35 W + 35 W (6 Ω at 1 kHz, 10% THD)
Other models
The following measured at AC 110, 220 V 60 Hz;
DIN power output (Rated) 25 W + 25 W (6 Ω at 1 kHz, DIN)
Continuous RMS power output (Reference)
30 W + 30W (6 Ω at 1 kHz, 10% THD)
The following measured at AC 120, 240 V 60 Hz;
DIN power output (Rated) 30 W + 30 W (6 Ω at 1 kHz, DIN)
Continuous RMS power output (Reference)
35 W + 35W (6 Ω at 1 kHz, 10% THD)
Peak music power output (Reference)
400 W
Outputs
PHONES (stereo phone jack) :
accepts headphones of 8 Ω or more
SPEAKER :accepts impedance of 6 to 16 Ω
CD player section
SystemCompact disc and digital audio system
LaserSemiconductor laser (λ = 780 nm)
Emission duration: continuous
Laser outputMax. 44.6 µW*
*This output is the value measured at a
distance of 200 mm from the objective
lens surface on the Optical Pick-up Block
with 7 mm aperture.
Frequency response20 Hz – 20 kHz (± 0.5 dB)
Wavelength780 – 790 nm
Tape deck section
Recording system4 -track 2 -channel stereo
Frequency response60 – 13,000 Hz (± 3dB), using Sony
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.
Design and specifications are subject to change without notice.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation 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
PRODUCT MARKING is
located on the rear exterior.
This caution
label is located
inside the unit.
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR 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 PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
— 2 —
Page 3
SAFETY CHECK-OUT
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.
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
return to chassis, must not exceed 0.5 mA (500 microampers).
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. Follo w the manufactur ers’ 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 A C 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)
T o Exposed Metal
Parts on Set
TABLE OF CONTENTS
1. GENERAL .......................................................................... 4
2. DISASSEMBLY
2-1. CD Door ............................................................................. 5
2-2. CD Mechanism Deck ......................................................... 5
2-3. Front Panel ......................................................................... 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
2-8. Cassette Lid (L)/(R)............................................................ 8
!¶FILE SELECT
!•I/u (POWER) button
!ªTUNER MEMORY REPEAT button
@ºEDIT button
@¡STEREO/M NO, PLAY MODE button
@™TAPE button
@£π (STOP) button
@¢0 ) CD/TUNER button
@∞PHONES jack
@§Deck A, PLAY/REC
@¶Deck B, PLAY
@•Tape operaying buttons
r(recording)
((play)
0(fast rening)
)(fast forward)
p 6 (stop/eject)
P(pause)
— 4 —
Page 5
SECTION 2
DISASSEMBLY
Note :Follow the disassembly procedure in the numerical order given.
2-1. CD DOOR
Two craws
2
CD door
1
Pull out the CD tray and remove the CD door
with releasing claws into the direction of arrow.
2-2. CD MECHANISM DECK
2
Screw (+PTPWH 3 × 10)
6
CD mechanism deck
4
Flat type wire (CN09)
1
Two screws (+B 3 × 8)
3
Two screws (+BVTP 3 × 10)
5
Harness (CN302)
— 5 —
2
Screw (+PTPWH 3 × 10)
Page 6
2-3. FRONT PANEL
1
Connector (CN401)
9
Front panel
7
Screw
(+PTPWH 3 × 10)
3
Screw (+BVTP 3 × 10)
8
Screw (+BVTP 3 × 10)
HOW TO SET THE
POWER CORD
4
Screw (+BVTP 3 × 10)
5
Two screw (+BVTP 3 × 10)
6
Two screws
(+BVTP 3 × 10)
7
Screw (+PTPWH 3 × 10)
2-4. MAIN BOARD AND H.P BOARD
1
8
2
Three screws
(+BVTP 3 × 10)
2
Harness (CN204)
Harness (CN303)
H.P board
3
Connector
4
Connector (CN202)
5
Connector (CN201)
power cord
7
MAIN board
— 6 —
Craw
6
Two screws
(+KTP 3 × 8)
Page 7
)
2-5. CD TRA Y
2
Bracket
1
Screw (+P 2.6 × 4)
6
CD tray
4
Bracket
5
Flat type wire
(CN06)
3
Screw (+P 2.6 × 4
2-6. CD DECODER BOARD
7
CD DECODER board
8
Two screw
(+BVTP 3 × 10)
9
Sheet
Craw
Craw
1
Two screws (+BVTP 3 × 10)
6
Flat type wire (CN06)
5
Flat type wire (CN01)
4
Connector (CN05)
!º
Connector (CN03)
Two craws
3
Belt
— 7 —
2
Two screws (+BVTP 3 × 10)
Page 8
)
2-7. BASE UNIT
5
UD-Cam
4
Screw (+PTPWH 2.6 × 8)
2
Screw (+PTPWH 2.6 × 8)
3
UD-gear
7
Spring
2-8. CASSETTE LID (L) / (R)
1
Cassette lid (L)
8
Spring
9
Base unit
6
Spring
1
Two screws (+KTP 3 × 8
Four craws
Four craws
— 8 —
2
Cassette lid (R)
Page 9
SECTION 3
MECHANICAL ADJUSTMENTS
SECTION 4
ELECTRICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback headpinch rollers
erase headrubber belts
capstanidlers
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
Torque
FWD
FWD
back tension
FF/REW
Torque meter
CQ-102C
CQ-102C
CQ-201B
Meter reading
40 to 70 g • cm
(0.56 - 0.97 oz • inch)
1 to 5 g • cm
(0.01 - 0.07 oz • inch)
55 to 140 g • cm
(0.76 - 1.94 oz • inch)
DECK SECTION0 dB=0.775V
1. Demagnetize the record/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
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.
Tape
P-4-A100
WS-48B
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)
Signal
10 kHz, –10 dB
3 kHz, 0 dB
SPEAKER
terminal (JK501)
Used for
Azimuth Adjustment
Tape Speed Adjustment
level meter
set
+
–
— 9 —
Page 10
2.Turn the adjustment screw and c heck 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.
L-CH
peak
screw
position
R-CH
peak
output
level
within
2dB
L-CH
peak
R-CH
peak
within 2dB
screw
position
4.After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location:
Remove the cassette lid before adjustment (See page 8)
Adjustment screws
REC/PB head (deck A)
or PB head (deck B)
3.Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
in phase45˚90˚135˚180˚
SPEAKER
terminal (JK501)
(L-CH)
L
set
R
SPEAKER
terminal (JK501)
(R-CH)
Waveform of oscilloscope
good
oscilloscope
wrong
Tape Speed Adjustment (Deck A)
Procedure:
1.Mode: Playback
test tape
WS-48B
(3kHz, 0dB)
set
SPEAKER
terminal (JK501)
frequency counter
+
–
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 —
— 10 —
Tape Speed
SFR201
CN204
Page 11
TUNER SECTION0 dB=1µV
AM T uning Voltage Adjustment
Main board
TP1
F
G
VT
DC voltmeter
+
–
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 (See page 12)
AM Trac king Adjustment
loop antenna
AM RF SSG
loop antenna
(Supplied accessories)
set
30% amplitude
modulation by
400 Hz signal
60 cm
Field strength dB (
µ
V/m) =SSG output level dB (µV/m) –26 dB.
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.
FM T uning Voltage Adjustment
Main board
TP1
IF
G
VT
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 v oltmeter is within
7.8 ± 0.5V.
AM ANTENNA
terminal (TM1)
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.
3.Use an oscilloscope with more than 10MΩ impedance.
4.Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
5.Adjust the focus bias adjustment when optical block is replaced.
Focus Bias Adjustment
CD DECODER
board
CN12
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.
DC voltmeter
+
–
RF Level Check
CD DECODER
board
TP (RF)
CN12 (VC)
oscilloscope
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
signal level is correct or not.
Note: Clear RF signal w aveform means that the shape “◊” can be
clearly distinguished at the center of the waveform.
VOLT/DIV: 200 mV
TIME/DIV: 500 nS
level: 1.0 Vp-p
+0.3
–0.2
Adjustment Location: CD DECODER board
Adjustment Location: CD DECODER board
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 —
Focus Gain
CN12
VR02
IC03
VR01
IC01
R07
RF Level
Focus Bias
— 13 —
Page 14
5-1. CIRCUIT BOARDS LOCATION
d
DISK board
SW (C) board
SECTION 5
DIAGRAMS
SW (D) board
SW (B) board
MOTOR (6P) (S) board
MOTOR board
CD DECODER board
PANEL board
SENSOR board
H.P board
R/P SWITCH board
SW (A) board
MAIN board
AC POWER boar
VR board
— 14 —
Page 15
5-2. BLOCK DIAGRAMS
— DECK SECTION —
TAPE B
HP901
PB
HEAD
R CHR CH
TAPE A
HRP901
REC/PB
HEAD
HE901
ERASE
HEAD
A
TUNER
SECTION
B
CD
SECTION
TU MUTE
TU L
ST IND
CD L
SCOR
SENS
SQSO
XLAT
SQCK
DATA
COUNT
FOK
CLK
STB
R CH
DRIVE
D208
Q201
PLAY/REC
CONTROL
16
Q203, 205
PLAY/REC
CONTROL
Q207
Q207
PLAY/REC
CONTROL
DO
DI
CE
D209
26
STB
12
12
4.19MHz
CE
21CE22
X601
L201
BIAS OSC
DI
CLK
23
DI
CLK
X211X1
HCD-GRX2/RX33
REC/PB
EQ AMP
IC201
3
1
2
Q211
9
R CH
Q218
Q
BIAS
OSC
18
17
20
19
51
38
SENS
SCOR
24
4
DI1
TU MUTE
52
53
FOK
COUNT
A
DATA
SQCK
VR UP
44
VR601
ENCODER
XLAT
45
SQSO
VR DOWN
B
PB OUT
5
TAPE A/B
Q217
REC SWITCH
MUTE
CONTROL
LED DRIVE
IC602
2
3
4
PIC UP
55
S01
CD DECK
UP/DOWN
DET
19
11
10
11
13
PIC DOWN
56
A/B
REC OUT
DI
CLK
36
47
ALATCH
FM ST IND
Q220
Q605,606
LED
DRIVE
OPEN/CLOSE
Q216
MUTE
SWITCH
D205
D212
Q208
Q208
LED602
LED601
TRAY OPEN59TRAY CLOSE
60
S02
TRAY
DET
CD SYNC
SWITCH
48
SYS REC
DISC
COUNTER
DET
Q209
MUTE
Q213
TAPE A/B
SWITCH
Q214
TAPE A
SWITCH
D202
D210
D211
DISC COUNT
57
S03
D203
SW201
REC/PLAY
PLAY
REC
TURNTABLE
OPERATION
S04
DET
Q301
D210
+11.5V
A DECK
B DECK
D207D206
M
SFR201
TAPE SPEED
Q602
Q602
RESET
SWITCH
TURN TABLE
58
10
RESET
Q601
Q601
POWER
DOWN DET
15
POWER DOWN
KI0 KI4
33 29
KEY
MATRIX
S601-623
11
9
10
12
S201
S202
S203
PLAY
M901
REC/CAPSTAN
MOTOR
RM601
REMOTE
CONTROL
RECEIVER
SELECTOR
IC301
3
2
39
REMOTE
D602
SYSTEM CONTROLLER/
32
CONTROL
FLD DRIVER
IC601
CLK14DI15CE
CLKDICE
13
64 78
P1 P21
.
81 85
FLD601
FLD DISPLAY
1
G1 G15
100 86
LINE AMP
IC302
5
7
Q307Q303
BASS BOOST
SWITCH
Q583,584
DRIVE
Q604
MUTE
Q603
MUTE
SWITCH
7
3
2
DBFB
POWER
SYSTEM MUTE
MUTE
MUTE
+30V
-30V
-12V
-27V
+7.9V
+11.5VFILTER
+11.5V
(SWITCHED)
D409
Q403
+7.9V
REG
Q404
+5.6V
REG
Q402
Q406,407
SITCHING
POWER AMP
IC501
132
Q408
-27V
REG
Q401
+12V
REG
D417
Q409
P MUTE
CONT
D416
Q410
AC OFF
DET
D401
RECT
D414,415
VOLTAGE
DOUBLER
D405-408
RECT
D553
Q551
Q553
Q585,586
MUTE
AC3.4V
AC3.4V
1
2
PT001
IC502IC502
SPEAKER
RELAY
DRIVE
7 4
R CH
RL501
6
AC
IN
• RCH is omitted
• Signal Path
: PB (DECK A)
: PB (DECK B)
: REC (DECK A)
: FM
: CD
JK303
PHONES
JK501
SPEAKER
— 15 —— 16 —
Page 16
HCD-GRX2/RX33
— TUNER/CD SECTION —
JK101
ANTENNA
75Ω
DET
DET
AGC
FM
IF
FM
AM
SMET
20
FM/AM MPX
IC102
AM
OSCAMMIX
PL DET
PH DET11PH DET
TU LED
13
6
L
CF103
450kHz
14
R
15
R CH
Q109
MUTE
AM/FM
MUTE
IF BUFF
FM DET
MPX VCO
AM
IF
ST IND
AM/FM
12
DECODER
CF104
8
10.7MHz
CF105
17
19kHz
4
T102
AM IFT
2
7
10
TU L
ST IND
TU MUTE
DO
A
MAIN
SECTION
• RCH is omitted
• SIGNAL PATH
:FM
:AM
:CD
1
3
FM FRONT END
IC101
RF
MIX
OSC
D103
T101
6
L103
TUB+
FM OSC
Q104
AM RF
AMP
Q103
B+
8
CF101
10.7MHz
Q102
AMP
Q105,106
L.P.F
7.2MHz
X201
Q101
RF IF
AMP
IF
G
VT
TP1
AM/FM
TUNING
VOLTAGE
19
21
17
24
1
10.7MHz
SFR101
FM
TUNED
LEVEL
FM
PD1
FM B+
XO
XI
CF102
PLL
IC103
ST/MONO
AM/FM
L CTR
R CTR
L105
MW OSC
B+
AM
SD
SD
DO
DI
CLK
CE
FM IF
1
MPX
16
AF DET
18
OSC
23
AFC
22
AM RF
21
OSC/FMSD
24
18
12
7
14
13
15
16
DO
5
DI
3
CLK
4
CE
2
L101
FM
AM
FM ANT
D101
L104
AM ANT
L102
FM RF
OPTICAL PICK-UP
DETECTOR
16
BLOCK
LD
PD
FOCUS
COIL
TRACKING
COIL
7
8
4
1
2
5
6
10
VC
LD
GND
PD
VR
F+
F
T+
T
M102
SLED
MOTOR
M101
SPINDOL
MOTOR
MOTOR
TRAY
MOTOR
CN2
42
TEO
CN12
1
FEO
45
REG
48
35
36
39
38
33
34
ATSC
VC
PD1
PD2
E
F
LD
APC
PD
PD
FE BIASEI
RV01
FOCUS
TRACKING
+7.5V
+5V
RF
AMP
FE
AMP
FOCUS PHASE
COMPENSATION
6
3740
IC01 (2/2)
16
IC06
+5V
A
C
B
D
E
F
Q01
APC
Q02
LD ON
SWITCH
F/T COIL
SL/SP MOTOR
T.T/TRAY MOTOR
DRIVER
IC03
4
F+
F IN
T IN
VCC
VCC
REG I
REG B
REG OUT
SL IN
SP IN
T.T F IN
T.T R IN
TR F IN
TR T IN
MUTE IN
6
5
8
7
9
Q11
10
11
22
21
13
12
29
28
27
3
F
2
T+
1
T
SL+
18
M
SL
17
SP+
20
M
SP
19
T.T+
T/T
14
M
T.T
15
TR+
30
M
TR
31
CD RF/SERVO
PROSSESOR
IC01 (1/2)
COMAND
SERIAL/
PARALLEL
CONVERTER
DECODER
FEOTAO
RV02
FOCUS
GAIN
14
67
TTL
TTL
TRACKING PHASE
COMPENSATION
13
CD DIGITAL
SIGNAL PROCESSOR
IC04
D/A
I/F
RFO
31
FOK
25
C OUT
IIL
IIL
SENS
DATA
XLT
CLK
XRST
Q04
SWITCH
23
24
21
20
19
22
T.T/TRAY
MOTOR DRIVE
REG CONTROL
IC02
XRST
SPEED
T.T+
T.T
TR+
TR
CONTRL
MUTE
DATA
CLOK
STB
4
DI
2
CLK
3
1
6
11
7
14
13
14
5
RF
36
FOK
23
CN
14
SE
13
DAT
15
XLT
16
CLK
17
8
XRST
MDP
25
CLV
SERVO
DIGITAL
CLV
EFM
DEMO.
SUB CODE
PROSSESOR
CPU I/F
XLON
DATA
CLOCK
SQCK
9 11 54 761
22
XLAT
10
SQSO
SENS
SCOR
SERIAL
MUTE
I/F
S05
LIMIT
SWITCH
PWM
PWM
PWM
PWM
CLOCK
GEN.
18
NL
NR
XTA1
XTA0
SPOA
MIX AMP
IC05
70
2
69
77
R
R-CH
78
73
X701
74
Q311
MUTE
1
3
L
CD L
SCOR
SENS
SQSO
XLAT
SQCK
DATA
COUNT
FOK
DI
CLK
CE
STB
B
MAIN
SECTION
— 17 —— 18 —
Page 17
HCD-GRX2/RX33
XIN
CE
DI
CL
DO
SYC
IN0
IN1
OUT0
OUT1
OUT2
OUT3
SHIFT REGISTER
LATCH
12 BIT
PROGRAMMABLE DIVIDER
SWALLOW COUNTER
1/16 . 1/17 BIT
REFERENCE
DIVIDER
PHASE DETECTOR
CHARGE PUMP
1 / 2
X OUT
VSS
PD2
PD1
VDD
FM IN
AM IN
OUT 6
HCTR
LCTR
OUT 5
OUT 4
UNIVERSAL
COUNTER
7
10
11
12
9
8
6
5
4
3
2
1
13
14
24
23
22
21
20
19
18
17
16
15
5-3. IC BLOCK DIAGRAMS
IC01 (CD DECORD BOARD) CXA1782BQ
PHD2
IC03 (CD DECORD BOARD) BA5941FP
IN4B
IN4A
IN3B
IN3A
27
BIAS IN
26
–
+
+
–
3
IN1B
24
25
4
IN1A
28
12
VCC
OP OUT
5
IN2B
OP IN (–)
23
6
IN2A
OP IN (+)
22
+
–
–
+
+
–
7
GND
GND
2120
MUTE
8
GND
NC
9
NC
MUTE
Vcc
VccVcc
VCC
OUT3A
18
19
–
+
LEVEL SHIFT
LEVEL SHIFT
+
–
11
10
VCC
OUT2A
OUT3B
–
+
+
–
1213
OUT2B
OUT4A
1617
–
+
LEVEL SHIFT
LEVEL SHIFT
+
–
OUT1A
+
+
15
14
OUT4B
–
–
37FE BIAS
OUT1B
38F
39E
40EI
PHD1
36
3534
IC02 (CD DECORD BOARD) TC9173P
1
GND
MUTE
2
CONTROL
3
XRST
4
5
T.T(M)
6
POSI.1
7
POSI.2
T.T.SW
8
DRIVER
SERIAL I/O
CONTROL
LATCH
C
T
DRIVER
LATCHLATCH
— 19 —— 20 —— 21 —— 22 —— 23 —
16
15
14
13
12
11
10
9
VDD
STB
CLOK
DATA I
DATA 0
LOADING
M-
LOADING
M+
SENSOR
41VEE
42TEO
43LPFI
44TEI
45ATSC
46TZC
47TDFCT
48VC
F IV AMP
BAL1
BAL2
TOG1
TOG2
• WINDOW COMP
PHD
–
+
–
+
APC
RF IV AMP1
RF IV AMP2
–
+
–
+
E IV AMP
BAL3
TOG3
ATSC
–
+
LD
33
–
+
–
+
+
–
FE AMP
+
–
TE AMP
1
FEO
RF M
32
–
+
–
+
LEVELS
+
–
FOK
TTL
IIL
FZC COMP
DFCT
3
2
FEI
FDFCT
DFCT
FS4
31
–
–
+
–
+
–
+
+
–
TZC COMP
RF O
–
+
RF I
30
–
+
+
+
–
MIRR
• IIL DATA RESISTOR• INPUT SHIFT RESISTOR
TOG1-3FS1-4TG1-2TM1-7PS1-4
BAL1-3
–
+
HPF COMPLPF COMP
• FCS PHASE
COMPENSATION
TM1
5
4
FLB
FGD
–
+
FS2
+
–
6
FE O
+
–
• ADDRESS DECODER
• OUTPUT DECODER
TG1
FS1
7
FE M
CB
29CP28
DFCT
• TRACKING
• PHASE
COMPENSATION
9
8
SRCH
TGU
–
TM7
TG2
+
TM6
TM5
TM4
TM3
CC126CC225FOK
27
–
+
24 SENS
IIL
TTL
23 C. OUT
22 XRST
TTL
21 DATA
20 XLT
IIL
19 CLK
18 VCC
• ISET
• F SET
11
10
TG2
FSET
TM2
17 ISET
–
16 SL 0
+
15 SL M
14 SL P
+
1312TA O
–
TA M
IC102 (MAIN BOARD) LA1831
OSC/FMSD
24211815
ALC
BUFFER
LEVEL
DET
FM IFREGGND
1
AM MIXREGAM IFGNDTU LED ST INDFM DETVCCAM/FM
FM IF
AFCAM RFSMETAM HPF AF DET MPX VCO MPX INR OUT
OSC
22191613
23
AM
OSCAMMIX
S-CURVE
FM DET
RF AMP
AM/FM
IF BUFE
3
2017
AM
AGC
AM DETAM IF
COMP
TUNING
DRIVE
4710
AM
FM
6912258
MUTEDECORDER
AM/FM
SW
IC103 (MAIN BOARD) LC7218-ST
VCC
STEREO DRIVE
FF
VCO
L OUT
14
STEREO SW
PHASE
DET
11
PH DET
PL DET
TRIG
PILOT
DET
PH DET
IC301 (MAIN BOARD) LC75392
1
LVROUT
–
+
2
LVRIN
LTOUT
LTCOM
LT4
LT3
LT2
LT1
VDD
3
4
5
6
7
8
L4
9
L3
10
L2
11
L1
12
13
CL
14
15
DI
+–+
–
IC201 (MAIN BOARD) TA8189N
–
+
+
–
CH2
CH1
METAL
CH2/A CH2/BNFVCCCGNFALC
2423222120191817
123456789101112
CH1/A CH1/BNFGND1 M/HNF
OUT
OUT
LATCH
DECODER
SHIFT
REGISTER
CONTROL
PRE
OUT
PRE
OUT
TAPE A
/TAPE B
A/B
VREF1
MIX
OUT
IREF
VREF2
M/N
REC
OUT
16
REC
OUT
+
–
CH2
CH1
30
RVROUT
–
+
29
RVRIN
28
RTOUT
27
RTCOM
RT4
26
25
RT3
RT2
24
RT1
23
R4
22
R3
21
R2
20
R1
19
VREF
18
VSS
17
16
CE
REC
IN
151413
–
+
+
–
REC
IN
GNDGND
GNDMETAL
ALC
IC602 (PANEL BOARD) BU2092
CONTROL
CIRCUIT
23
1
VSS
DATA
CLOCK
4
LCK
12 BIT
SHIFT
REGISTER
12 BIT
STORAGE
REGISTER
VDDOEQ11
1718
Q10Q9Q8Q7Q6
OUTPUT
BUFFER
(OPEN DRAIN)
5 6 7 8 9
Q0
Q5
1016 15 14 13 12 11
Q4
Q3
Q2
Q1
Page 18
HCD-GRX2/RX33
5-4. SCHEMATIC DIAGRAM — MAIN SECTION —
A
B
C
12
3456789101112131415161718192021222324
D
E
F
G
H
J
K
• Waveform
IC102 @£ OSC
1
IC103 @¢ XOUT
2
0.1V/div
0.5µsec/div
0.48 Vp-p
1V/div
1µsec/div
3.2 Vp-p
I
7.2MHz
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specified.
• C : panel designation.
• U : B+ Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
() : REC
<> : AM
(()) : PLAY
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
F: FM
f: AM
E: PB (DECK A)
a : REC (DECK A)
d: PB (DECK B)
J: CD
514-210-296-01 WINDOW (R), DOOR
524-210-294-01 LID (R), CASSETTE
534-210-326-01 SPRING, DOOR
544-210-295-01 WINDOW (L), DOOR
554-210-293-01 LID (L), CASSETTE
L1011-429-551-11 TRANSFORMER, FM RF
L1021-429-550-11 TRANSFORMER, FM ANT
L1031-411-798-11 COIL, FM OSC
L1041-411-901-11 COIL, ANTENNA
L1051-429-555-11 TRANSFORMER, MW OSC
R3021-247-855-11 CARBON10K5%1/4W
R3051-249-417-11 CARBON1K5%1/4W F
R3061-249-417-11 CARBON1K5%1/4W F
R3071-249-418-11 CARBON1.2K5%1/4W F
R3081-249-418-11 CARBON1.2K5%1/4W F
R3501-247-849-11 CARBON5.6K5%1/4W
R3511-247-871-11 CARBON47K5%1/4W
R3521-247-871-11 CARBON47K5%1/4W
R3561-249-417-11 CARBON1K5%1/4W F
R3571-249-417-11 CARBON1K5%1/4W F
R6161-249-418-11 CARBON1.2K5%1/4W F
R6171-249-420-11 CARBON1.8K5%1/4W F
R6181-249-418-11 CARBON1.2K5%1/4W F
R6191-249-420-11 CARBON1.8K5%1/4W F
R6201-247-841-11 CARBON2.7K5%1/4W
R6211-249-424-11 CARBON3.9K5%1/4W F
R6221-249-427-11 CARBON6.8K5%1/4W F
R6231-249-431-11 CARBON15K5%1/4W
R6241-249-436-11 CARBON39K5%1/4W
R6251-249-418-11 CARBON1.2K5%1/4W F
R6261-249-420-11 CARBON1.8K5%1/4W F
R6271-249-418-11 CARBON1.2K5%1/4W F
R6281-249-420-11 CARBON1.8K5%1/4W F
R6291-247-841-11 CARBON2.7K5%1/4W
R6351-247-871-11 CARBON47K5%1/4W
R6361-249-407-11 CARBON1505%1/4W F
R6371-249-417-11 CARBON1K5%1/4W F
R6381-249-417-11 CARBON1K5%1/4W F
R6391-249-417-11 CARBON1K5%1/4W F
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IC6018-759-539-19 IC uPD780205GF-042-3BA
IC6028-759-275-23 IC BU2092