Aiwa CDC-R237 User manual

1
Ver 1.0 2003. 02
Model Name Using Similar Mechanism NEW
CD Drive Mechanism Type MG-930B-185
Optical Pick-up Name OPTIMA-752B2
SERVICE MANUAL
AEP Model
UK Model
CDC-R237
RADIO SECTION
(FM)
Frequency Range: 87.5 MHz – 108 MHz
Intermediate frequency: 10.7 MHz
Usable Sensitivity: 12.7 dBf
50 dB Quieting Sensitivity: 17.2 dBf
IF Rejection: 100 dB
Frequency Response: 30 Hz – 15,000 Hz
S/N Ratio: 67 dB
Stereo Separation: 35 dB at 1 kHz
Alternate Channel Selectivity: 98 dB
Capture Ratio: 3 dB
(MW)
Frequency Range: 531 kHz – 1,602 kHz
Intermediate frequency: 10.71 MHz/450 kHz
Usable Sensitivity: 30 µV (30 dB)
(LW)
Frequency Range: 144 kHz – 288 kHz (1 kHz/9 kHz step)
Intermediate frequency: 10.71 MHz/450 kHz
Usable Sensitivity: 30 µV (30 dB)
SPECIFICATIONS
CD SECTION
Frequency Response: 17 Hz – 20 kHz +0/–3 dB
Dynamic Range: More than 92 dB
Channel Separation: More than 60 dB
S/N Ratio: More than 92 dB
Wow/Flutter: Unmeasurable
AUDIO SECTION
Max. Power Output: 45 W ×4 channels
AUX Input
Input sensitivity (load impedance)AUX: 300 mV (10 kΩ)
• The CD section have no adjustment.
Sony Corporation
e Vehicle Company
Published by Sony Engineering Corporation
9-877-041-01
2003B0400-1
© 2003. 02
– Continued on next page –
FM/MW/LW COMPACT DISC PLAYER

2
CDC-R237
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH 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.
GENERAL
Power-SupplyVoltage: 14.4 V (11 to 16 V allowable),
DC, negative ground
Load Impedance: 4 Ω
Tone Control: Bass ±10 dB at 100 Hz,
Treble ±10 dB at 10 kHz
Preamp Output Voltage (load impedance): 2.2 V (10 kΩ)
Installed size: 182 (W) ×53 (H) ×155 (D) mm
SuppliedAccessory: Carrying case (1)
• Specifications and external appearance are subject
to change without notice due to product improvement.
SERVICE NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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.
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.
CAUTION
Use of controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation
exposure.
This compact disc player is classified as a CLASS 1 LASER
product. The CLASS 1 LASER PRODUCT label is located on the
exterior.

3
TABLE OF CONTENTS
1. GENERAL
Connections ............................................................................. 4
2. DISASSEMBLY
2-1. Sub Panel Assy .................................................................... 7
2-2. CD Mechanism Block ......................................................... 7
2-3. Main Board Section ............................................................ 8
2-4. Main Board ......................................................................... 8
2-5. Heat Sink (CT) .................................................................... 9
2-6. Sub Board............................................................................ 9
2-7. Servo Board....................................................................... 10
2-8. Floating Block Assy .......................................................... 10
2-9. Lever Assy (CD Up Holder)..............................................11
2-10. Lever (CD Roller) Sub Assy ............................................. 11
2-11. Lever Assy (CD Holder) ................................................... 12
2-12. Motor (Sled) Sub Assy ...................................................... 12
2-13. Pick-up Sub Assy .............................................................. 13
3. ELECTRICAL ADJUSTMENT.................................... 14
4. DIAGRAMS
4-1. IC Pin Descriptions ........................................................... 15
4-2. Block Diagram –CD Section–........................................... 19
4-3. Block Diagram –Main Section–........................................ 20
4-4. Block Diagram –Front Section–........................................ 21
4-5. Circuit Boards Location .................................................... 21
4-6. Printed Wiring Boards –CD Mechanism Section–............ 22
4-7. Schematic Diagram –CD Mechanism Section– ................ 24
4-8. Printed Wiring Board –Main Section– .............................. 25
4-9. Schematic Diagram –Main Section (1/2)– ........................ 26
4-10. Schematic Diagram –Main Section (2/2)– ........................ 27
4-11. Printed Wiring Boards –Front Section– ............................ 28
4-12. Schematic Diagram –Front Section– ................................ 29
4-13. IC Block Diagrams............................................................ 30
5. EXPLODED VIEWS
5-1. Chassis Section ................................................................. 32
5-2. Front panel Section ........................................................... 33
5-3. CD Mechanism Section (1) ............................................... 34
5-4. CD Mechanism Section (2) ............................................... 35
6. ELECTRICAL PARTS LIST ........................................ 36
CDC-R237

4
CDC-R237 SECTION 1
GENERAL This section is extracted
from instruction manual.

5
CDC-R237

6
CDC-R237 SECTION 2
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
2-1. SUB PANEL ASSY
(Page 7)
2-2. CD MECHANISM BLOCK
(Page 7)
2-6. SUB BOARD
(Page 9)
2-7. SERVO BOARD
(Page 10)
SET
2-13. PICK-UP SUB ASSY
(Page 13)
2-4. MAIN BOARD
(Page 8)
2-5. HEAT SINK (CT)
(Page 9)
2-3. MAIN BOARD SECTION
(Page 8)
2-8. FLOATING BLOCK ASSY
(Page 10)
2-9. LEVER ASSY (CD UP HOLDER)
(Page 11)
2-10. LEVER (CD ROLLER) SUB SSY
(Page 11)
2-11. LEVER ASSY (CD HOLDER)
(Page 12)
2-12. MOTOR (SLED) SUB ASSY
(Page 12)

7
CDC-R237
2-2. CD MECHANISM BLOCK
Note : Follow the disassembly procedure in the numerical order given.
2-1. SUB PANEL ASSY
4 sub panel assy
3 claws
2 claws
1 B 2.6x6
3 CON701
6 CD mechanism block
5 holder (CD mecha
)
1 PTT 2.6x6
2 PTT 2.6x6
4 P 2.6x4

8
CDC-R237
2-4. MAIN BOARD
2-3. MAIN BOARD SECTION
2 cover
3 insulation sheet
4 Removal the solder.
7 MAIN board section
5 Removal the solder.
6 Removal the solder.
1 PTP 2.6x4
0 MAIN board
1 PTT 2.6x6
4 PTT 2.6x6
6 side chassis (L)
8 side chassis (R)
9 front chassis
5 PTT 2.6x6
3 PTT 2.6x6
7 PTT 2.6x6
2 PTT 2.6x
6

9
CDC-R237
2-5. HEAT SINK (CT)
2-6. SUB BOARD
4 heat sink (CT)
1 screw (2.6x8)
2 P 3x12
3 PTT 2.6x
8
3 SUB board
1 Removal the solders.
2 P 1.4x2
orange
yellow
green

10
CDC-R237
2-8. FLOATING BLOCK ASSY
2-7. SERVO BOARD
2 PTT 2x3
3 screws (M1.7x5)
4 SERVO board
5 PIC2 FLEXIBLE board
1 Removal the solders.
red
brawn
orange
blue
black
red
yellow green
1 tension spring
2 tension spring
3 tension spring
qd floating block aasy
4 tension spring
5 tension spring
6 claw
7 claw
8 claw
qa oil damper
qs oil damper
9
0

11
CDC-R237
2-9. LEVER ASSY (CD UP HOLDER)
2-10. LEVER (CD ROLLER) SUB ASSY
1 P 1.4x2
3 special scre
w
4 tension spring
5 lever assy (CD up holder)
2 leaf spring (roller)
3 lever (CD roller) sub assy
1
2

12
CDC-R237
2-11. LEVER ASSY (CD HOLDER)
2-12. MOTOR (SLED) SUB ASSY
2 special screw
1 torsion spring
4 lever assy (CD holder)
3
1 P 1.7x2
2 motor (sled) sub ass
y

13
CDC-R237
2-13. PICK-UP SUB ASSY
1 B 1.4x5
2 leaf spring
3 pick-up sub assy

14
CDC-R237
RDS Adjustment
Setting:98 MHz
31 dBµV (EMF)
1 kHz (Modulation Frequency)
45 kHz DEV
Check point: S.METER test point
Adjustment location: SFR101
Specification: 2.0±0.1 V
Procedure: Set to FM98.0 MHz and adjust SFR101 so that the test
point is 2.0±0.2 V.
Adjustment Location:
SECTION 3
ELECTRICAL ADJUSTMENT
IC401
TU101
MAIN BOARD (CONDUCTOR SIDE)
IC901
IC151
CON702
TP16 S.METER
SFR101 RDS Adjustment

15
CDC-R237
4-1. IC PIN DESCRIPTIONS
• IC241 TC94A09F-303 (DIGITAL SIGNAL SERVO PROCESSOR) (SERVO BOARD)
Pin No. Pin Name I/O Pin Description
1 – 9 S1 – 9 (OT5 – 13) O LCD segment signal output/Output port Not used. (Open)
10 S10 (OT14/ZDET) O LCD segment signal output/Output port/CD signal Not used. (Open)
11 S11 (OT15/CLCK) O LCD segment signal output/Output port/CD signal Not used. (Open)
12 S12 (OT16/DATA) O LCD segment signal output/Output port/CD signal Not used. (Open)
13 S13 (OT17/SFSY) O LCD segment signal output/Output port/CD signal Not used. (Open)
14 S14 (DT18/LRCK) O LCD segment signal output/Output port/CD signal Not used. (Open)
15 P8-0 (S15/BCK) I/O I/O port/LCD segment signal output/CD signal Not used. (Open)
16 P8-1 (S16/AOUT) I/O I/O port/LCD segment signal output/CD signal Not used. (Open)
17 P8-2 (S17/MBOV) I/O I/O port/LCD segment signal output/CD signal Not used. (Open)
18 P8-3 (S18/IPF) I/O I/O port/LCD segment signal output/CD signal Not used. (Open)
19 MVDD1 — Power supply pin (+5V)
20 MVSS — Ground pin
21 LMT SW I Limit switch signal input
22 P1-1 (K1) I Key signal input
23 P1-2 (K2) I Key signal input
24 SW3 I Key signal input
25 SRQ I CDS SRQ signal input
26 LM CONT O Loading motor speed control signal output
27 P3-2 (ADIN2) I/O I/O port/AD analog voltage signal input Not used. (Open)
28 P3-3 (ADIN3) O Mute signal output
29 P4-0 (BUZR/AD4) I/O I/O port/AD analog voltage signal input/buzzer signal output Not used. (Open)
30 DATA IN I CDS serial data signal input
31 DATA OUT O CDS serial data signal output
32 CLOCK I/O CDS serial clock signal input/output
33 P2-0/EMPH I/O Emphasis signal input/output
34 P2-1/HSO I/O I/O port/1 bit DAC input Not used. (Open)
35 P2-2/LRCK I/O I/O port/1 bit DAC input Not used. (Open)
36 P2-3/DATA I/O I/O port/1 bit DAC input Not used. (Open)
37 IN1/BCK I Input port/1 bit DAC input Connect to ground.
38 TESTC I Test mode control input Not used. (Open)
39 DT19 (/HSO) O Output port/CD control signal output Not used. (Open)
40 DT20 (SPCK) O Output port/CD control signal output Not used. (Open)
41 DT21 (SPDA) O Output port/CD control signal output Not used. (Open)
42 DT22 (COFS) O Output port/CD control signal output Not used. (Open)
43 DOUT O Digital out signal output Not used. (Open)
44 SBSY O Sub code block sync signal output Not used. (Open)
45 SBOK O Sub code Q data signal output Not used. (Open)
46 VDD1 — Power supply pin (+5V)
47 VSS1 — Ground pin
48 P2VREF — PLL 2 voltage reference pin
49 PDO I EFM/PLCK signal difference error signal input
50 TMAX I TMAX detect signal input
51 LPFN I Inversion signal input of amplifier for lowpass filter
52 LPFO O Signal output of amplifier for lowpass filter
53 PVREF I PLL voltage reference input
54 VCOF O VCO filter signal output
55 AVSS — Ground pin
56 SLCO O DAC signal output
57 RFI I RF signal input
58 AVDD — Power supply pin
59 RFCT I RFRP signal center level input
SECTION 4
DIAGRAMS

16
CDC-R237
Pin No. Pin Name I/O Pin Description
60 RFZI I RFRP zero-closs signal input
61 RFRP I RFRP ripple signal input
62 FEI I Focus error signal input
63 SBAD I Sub beam addition signal input
64 TEI I Tracking error signal input
65 TEZI I Tracking error zero-closs signal input
66 FOO O Focus equalizer signal output
67 TRO O Tracking equalizer signal output
68 VREF — Analog reference power supply pin
69 RFGC O RF amplitude adjustment control signal output
70 TEBC O Tracking balance control signal output
71 FMO O Focus equalizer signal output
72 DMO O Disc equalizer signal output
73 2VREF — Analog reference power supply pin
74 SEL O APC circuit on/off signal output
75 VDD2 — Power supply pin (+5 V)
76, 77 VSS2, XVSS — Ground pin
78 XI I Crystal oscillator input for CD
79 XO O Crystal oscillator output for CD
80 XVDD — Power supply pin (+5 V)
81 DVSR — Ground pin
82 RO O R channel data clock wise signal output
83 DVRR — R channel reference voltage pin
84 DVDD — Power supply pin
85 DVRL — L channel reference voltage pin
86 LO O L channel data clock wise signal output
87 DVSL — Ground pin
88 TESTM I Ground pin
89 IN2/(VPP) I Ground pin
90 RESET I System reset signal input
91 /HOLD I Hold mode control signal input
92 CS I External interruption signal input
93 MXO O Not used. (Open)
94 MXI I Ground pin
95 MVSS2 — Ground pin
96 MVDD2 — Power supply pin (+5 V)
97 – 100 COM1 – 4 (OT1 – 4) O Not used. (Open)

17
CDC-R237
• IC901 µPD178078GF-589-3BA (SYSTEM CONTROL) (MAIN BOARD)
Pin No. Pin Name I/O Pin Description
1BATT IN I Battery signal input
2DFP IN I Front panel with/without detect signal input
3LCD DI I LCD serial data signal input
4LCD DO O LCD serial data signal output
5LCD CLO O LCD sync clock signal output
6LCD CE O LCD driver CE signal output
7BBE1 O Not used. (Open)
8CDS DI I CDS serial data signal input
9CDS DO O CDS serial data signal output
10 CDS CLO O CDS sync clock signal output
11 – 15 NC O Not used. (Open)
16 BBE2 O Not used. (Open)
17 NC O Not used. (Open)
18 EVOL CLO O Clock signal output to electronic volume
19 EVOL DO O Serial data signal output to electronic volume
20 EVOL CE O CE signal output to electronic volume
21 LOC/DX O LOC/DX select signal output
22 DSSA CONT O DSSA control signal output “H”: DSSA L/R
23 ACC DETECTOR I Power supply overvoltage detect signal input
24 PHONE MUTE I External mute control signal input
25 LEVELIND I Level signal input
26 TEST — CDS test mode pin
27 AVDD — Power supply pin (+5 V)
28 – 30 NC I Not used. (Connect to ground.)
31 FM/AM S METER I RDS AF signal input/FM/AM S meter signal input
32 AVSS — Ground pin
33 REGCPU — Regulator for CPU power supply
34 VDD — Power supply pin (+5 V)
35 REGOSC — Regulator for oscillator circuit
36, 37 X2, X1 — System clock oscillator pin (6.3 MHz)
38 GND — Ground pin
39 IF REQ O IF count signal request output
40 GND — Ground pin
41 AM IF I AM IF count signal input
42 FM IF I FM IF count signal input
43 VDD PLL — Power supply pin for PLL (+5 V)
44 FM OSC I FM local oscillator signal input
45 AM OSC I AM local oscillator signal input
46 GND PLL — Ground pin for PLL
47 EO 0 O Error out signal output from charge pomp
48 EO 1 O Error out signal output from charge pomp
49 IC — Not used. (Connect to ground.)
50 RESET I System reset signal input
51 RDS CLK IN I RDS clock signal input
52 ACC IN I ACC on/off detect signal input
53 NC I Not used.
54 ST IND/SD IN I FM receive stereo signal input
55 NC O Not used. (Open)
56 ST BY MUTE O ST-BY mute control signal output to power IC
57 POWER CONT O Power control signal output
58 RDS DI I RDS serial data signal input
59 BEEP O Beep signal output

18
CDC-R237
Pin No. Pin Name I/O Pin Description
60 AF MUTE O Audio mute control signal output
61 – 63 NC O Not used. (Open)
64 RDS MODE O RDS mode signal output “H”: RDS AF
65 POWER MUTE O Mute control signal output to power IC
66 FM O Band (FM) select signal output
67 AM O Band (AM) select signal output
68 – 70 NC O Not used. (Open)
71 MI-1 I Diode matrix input for initial setting
72 MI-2 I Diode matrix input for initial setting
73 TEST MODE I Test mode pin for CD mechanism
74 MO-1 O Diode matrix output for initial setting Not used. (Open)
75 MO-2 O Diode matrix output for initial setting Not used. (Open)
76 MO-3 O Diode matrix output for initial setting
77 MO-4 O Diode matrix output for initial setting Not used. (Open)
78 EJECT I Disc eject interruption signal input
79 S REQ I CDS S-REQ signal input
80 RE1 IN I Rotary encoder signal input 1
81 RE2 IN I Rotary encoder signal input 2
82 GND — Ground pin
83 NC O Not used. (Open)
84, 85 PANCON 1, 2 O Not used. (Open)
86 SW1 I Switch signal input
87, 88 NC (SW2, 3) O Not used. (Open)
89 FLAP IN O Not used. (Connect to ground.)
90 MF CONT O Not used. (Open)
91, 92 SEN 1, 2 O Not used. (Connect to ground.)
93 NC O Not used. (Open)
94 CDS RESET O CDS reset signal output
95 CDS SLEEP O CDS sleep signal output
96 CDS CS O CDS CS signal output
97 NC O Not used. (Open)
98 RADIO CONT O Radio control signal output
99 VDDPORT — Power supply pin (+5 V)
100 GND — Ground pin

19 19
CDC-R237
4-2. BLOCK DIAGRAM — CD SECTION —
(Page 20)
25
24
22
20
16
17
15
14
13
11
10
2
26
57
60
59
62
86
82
63
64
65
70
74
69
33
9
8
4
7
6
5
FOCUS
COIL
DRIVE
LD
DRIVE
Q221
TRACKING
COIL
DRIVE
SPINDLE
MOTOR
DRIVE
5V
REG.
8
9
20
M2
(SPINDLE) M
M1
(SLED/LOADING) M
-
+
+
-
FOCUS
COIL
TRACKING
COIL
VIN3
VIN3G
VIN4
VIN4G
VIN2
VIN2G
VIN1
REG IN
VIN1G
MUTE
VO3+
VO3-
VO4+
VO4-
VO2+
VO2-
VO1+
VO1-
REG
OUT
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE/LOADING MOTOR DRIVE,
IC201
6
7
4
5
13
15
25
16
14
19 +5V REG
Q201
24
23
17
18
S3
(CHUCH)
S2
(DISC IN2)
S1
(DISC IN1)
S4
(LIMIT)
+5V
VC
1
2
3
4
5
6
7
8
9
10
11
13
12
15
14
FRI
RFI
RFZI
FEI
RFCT
61 RFRP
SBAD
TEI
TEZI
TEBC
SEL
RFGC
P2-O/EMPH
78 XI
79 XO
66 FOO
67 TRO
28 P3-3(ADIN3)
72 DMO
26 LM CONT
71 FMO
TPI
TNI
FNI
MDI
LDD
19 VRO
RFGO LO
RO
RFRPIN
RFCT
RFRP
FEO
FEN
SBAD
TEO
TEN
TEB
SEL
RFGC
GVSW
VREF
10
11
X241
16.9344MHz
DIGITAL SIGNAL SERVO PROCESSOR
IC241
RF AMP
IC221
23
P1-2(K2)
24
SW3
22
P1-1(K1)
CDS SRQ
SW1
CDS DI
CDS DO
CDS CLO
CDS CS
RESET
CD R
CD L
21
LIMIT SW
CD+5V
CD+8V
OPTICAL PICK-UP
BLOCK
MAIN
SECTION
A
SLED/
LOADING
MOTOR
DRIVE
SPEED
CONTROL
Q202
90
92
RESET
CS
32
31
CLOCK
SRQ
30
25
DATA OUT
DATA IN
• Signal path
:CD

2020
CDC-R237
4-3. BLOCK DIAGRAM — MAIN SECTION —
(Page 19)
(Page 21)
116
AMANT
ANT101
(ANTENNA)
2FMANT TUN-RCH
LCH
17
RCH
22
SD/ST IND
TU101
(TUNER UNIT)
AUX-RCH
21
25
12
13
SYSTEM CONTROL
IC901
ELECTRONIC VOLUME
IC401
LROUT
20
EVOL CE
EVOL CLO
19
18
EVOL DO
60
AF MUTE
65
POWER MUTE
LSELO
LIN
LEVEL IND
MUX DATA
XOUT
RDS DECODER
IC151
XIN
44 FMOSC
45 AMOSC
47 EO0
39 IF REQ
64 RDS MODE
54 ST IND/SD IN
LOC/DX
X1
RESET
58 RDS DI
4ST-BY
22 MUTE
RL
FL
11
POWER AMP
IC501
2
CON851
R-CH
FL+
10
FL-
RL+
RL-
3
11
RR+
RR-
4
12
FR+
FR-
+B
7ACC
+B
R-CH
BATT
PON+B
F901
6ANT-R
17
19
18
16 BATT
56
ST BY MUTE
59
BEEP
24
PHONE MUTE
23
ACC DETECTOR
95
CDS SLEEP
50
16 AUX IN
LJ401
R
AUX(L)
TUN(L)
17 CD(L)
9
7
12
1
9
5
3
MUTE
Q403
AUDIO OUT
REAR
MUTE
Q401
4
LFOUT
DI
CE
CL
5
1
2
36
15
41 AM IF
31 FM/AM S METER
42 FM IF
11
AM/FM OSC
24
DET OUT 42
14 13
6
FMVT
14
AMVT
20
IF COUNT
21
SMETER
3
AM DX/LCL
4
FM DX/LCL
14
X901
6.3MHz
SW901
(RESET)
37
CDS RESET
94
CDS CS
96
CDS CLO
10
CDS DI
8
CDS DO
9
SREQ
79
SW1
86
CD R CD-RCH
CD L
RESET
CDS CS
CDS CLO
CDS DO
CDS DI
CDS SRQ
SW1
36 X2
4
LCD DO
6
LCD CE
57
POWER CONT
2
DFP IN
3
LCD DI
80
RE1 IN
5
LCD CLO
81
RE2 IN
LCD DO
LCD CE
DFP IN
LCD DI
RE 1
LCD CLO
RE 2
1 1
BATT IN 2 IN
CD+8V
OUT BATT
BATT
COM+9V
SW+8V REG
Q803,806-808
BATT DET
IC902
COM+9V
LAMP+B
PON+B
BATT
POWER
CONTROL
Q801,802
COM+9V REG
Q802,805
BU+5V BATT
+5V REG
Q809,810
LEVEL AMP
Q451
VOL/
TONE FADER
LPF(FM)
Q105,106
48 EO1
LPF(AM)
Q108,109
FM+B
FM+B
SWITCHING
Q103
COM+9V
AM+B
AM+B
SWITCHING
Q102
LOCAL
SWITCHING
Q101
BATT
SHUTDOWN
MUTE
Q501,502
MUTE
CONTROL
Q405,406
13 TEL MUTE
RL(+)
RL(-)
FL(+)
FL(-)
J601
AUX
FRONT
SECTION
B
CD
SECTION A
66
FM
67
AM
CL 51 RDS CLK IN
16
X151 4.322MHz
SFR101
• Signal path
: CD
: FM
: AM
: AUX
• R-ch is omitted due to same as L-ch.