Sony WALKMAN WM-FX483 User manual

WM-FX483/FX485/FX487
US Model
WM-FX487
Canadian Model
WM-FX485/FX487
AEP Model
E Model
WM-FX483/FX485/FX487
SERVICE MANUAL
RADIO CASSETTE PLAYER
MICROFILM
Model Name Using Similar Mechanism WM-EX402/EX404/EX405/EX406
Tape Transport Mechanism Type MF-WMFX483-147
SPECIFICATIONS
Manufactured under license from Dolby
Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol aare
trademarks of Dolby Laboratories Licensing
Corporation.
Design and specifications are subject to change without notice.
Photo : WM-FX485
Ver 1.0 1998.03

— 2 —
TABLE OF CONTENTS
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron aroud 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.
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.
1. GENERAL ······································································ 3
2. DISASSEMBLY
2-1. Cabinet (Front) Assy ·························································· 5
2-2. Main Board········································································· 6
2-3. Mechanism Deck ································································ 6
2-4. Cassette Lid SubAssy ························································ 7
2-5. Display Board····································································· 7
3. MECHANICAL ADJUSTMENT······························· 8
4. ELECTRICAL ADJUSTMENT ································ 8
5. DIAGRAMS
IC Block Diagrams··························································· 11
5-1. Block Diagram ································································· 13
5-2. Printed Wiring Board -Main Section- ······························ 15
5-3. Schematic Diagram -Main Section- ································· 17
5-4.
Printed Wiring Board -Display Section-(FX483/FX485 )··19
5-5. Schematic Diagram
-Display Section-(FX483/FX485 ) ···· 21
5-6.
Printed Wiring Board -Display Section-(FX487 ) ·············· 23
5-7. Schematic Diagram
-Display Section-(FX487 ) ················ 25
5-8. IC Pin Function ································································ 27
6. EXPLODED VIEWS
6-1. Cassette Lid Section ························································· 29
6-2. Cabinet Section································································· 31
6-3. Mechanism Deck Section················································· 32
7. ELECTRICAL PARTS LIST ··································· 33

SECTION 1
GENERAL
— 3 —

— 4 —

— 5 —
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (REAR) ASSY
•This set can be disassembled in the order shown below.
2-1. CABINET (REAR) ASSY 2-2. MAIN BOARD
2-4. CASSETTE LID SUB ASSY
2-3. MECHANISM DECK
2-5. DISPLAY BOARD
1 Screw (B 1.7 × 12), tapping
2 Open the lid battery case.
3
3
3
Cabinet (rear) assy
Claws
Claws
6
5
5
5
4

— 6 —
2-2. MAIN BOARD
2-3. MECHANISM DECK
• Use caution when installing the cassette holder assy
Install the cassette holder with the spring (lid up) as shown
below in the drawing so that it fits into the holes on the
cabinet front assy. Once installed, fit the left and right pieces
on.
3 PC board, flexible
Cabinet (front) assy
HEAD flexible board
1 Screw (1.7 × 2.5), tapping
MAIN board
4
4
5
Mechanism deck
Cabinet (front) assy
2
1
1
1

— 7 —
2-5. DISPLAY BOARD
2-4. CASSETTE LID SUB ASSY
•Press on the left & right clips from the
rear of the Cabinet (front) assy, and
remove the boss.
2
1
Cassette lid sub assy
Cabinet (front) assy
3 Spring (lid up) Cassette lid sub assy
Cabinet (front) ass
y
2
1 Screws
1 Screws
DISPLAY board
Holder
Cassette lid

— 8 —
SECTION 3
MECHANICAL ADJUSTMENT SECTION 4 ELECTRICAL ADJUSTMENT
PRECAUTION
1. Clean the following parts with a denatured-alcahol-moistened
sweb :
Playback head Pinch roller
Rubber belt Capstan
2. Demagnetize the playback head using a demagnetizer.
3. Do not use a magnetized screwdriver for adjustments.
4. After adjusting, apply screw-locking compound onto the
adjusted parts.
5. Unless specified otherwise, use a specified voltage (3.0V) to
perform the adjustments.
Torque Measurement
Mode
FWD
FWD
Back Tension
REV
REV
Back Tension
FF
REW
Torque meter
CQ-102C
CQ-102RC
CQ-201B
Meter reading
20 - 42 g · cm
(0.28-0.58 oz · inch)
Less than 2 g · cm
(Less than 0.03 oz · inch)
20 - 42 g · cm
(0.28-0.58 oz · inch)
Less than 2 g · cm
(Less than 0.03 oz · inch)
More than 50 g · cm
(More than 0.69 oz · inch)
PRECAUTION
1. Specified voltage : 3.0V
2. Switch and control position
MENU switch
MENU → TAPE → SET : NORM
MENU → SOUND → SET : No message
MENU → AVLS → SET : No message
MENU → aNR → SET : OFF (FX485/FX487)
VOL control : maximum
CASSETTE SECTION
Test Tape
Tape Speed Adjustmnet
Procedure :
1. Playback WS-48A (Tape center part) and adjust RV601 so that
the frequency counter reading becomes 2,985Hz to 3,015Hz.
2. PlaybackWS-48A (Tape top and end).
Check that frequency counter reading is within 1.5% of the
reading of step1.
Adjustment Point :
Type
WS-48A Signal 3kHz, 0dB Purpose Tape Speed Adjustment
Test tape
WS-48A
(3kHz, 0dB)
Set
16
Ω
PHONES jack
+
–
Frequency counte
r
RV601

— 9 —
TUNER SECTION
[AM]
Setting :
RADIO ON/BAND switch : ON/AM
AM Tuning Voltage Adjustment
( ) : Except US, Canadian models
AM IF Adjustment, AMTracking Adjustment
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
( ) : Except US, Canadian models
( ) : Except US, Canadian models
[FM]
Setting :
RADIO ON/BAND switch : ON/FM
FMTuning Voltage Adjustment
FMTracking Adjustment
[ ] : East European model
AMTRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 620kHz (621kHz)
CT2 1,400kHz (1,395kHz)
Set
PHONES
+
–
FM RF signal
generator
75kHz frequency
deviation by 1KHz signal.
Output level : as low as possible.
0.01 µ Fto IC1 pin
1
Level meter
(AC : 0.5 – 5V range)
16
Ω
AM RF signal
generator
30% amplitude modulation
by 400Hz signal.
Output level : as low as possible
Put the lead-wire antenna
close to the set.
Set
jack
16
Ω
+
–
Level meter
(AC : 0.5 – 5V range
)
2
+
–
digital voltmete
r
(VT)
(GND)
MAIN board
AMTUNINGVOLTAGE ADJUSTMENT
Adjust for a 1.5 ± 0.03Vde reading on digital voltmeter.
L3 530kHz
(531kHz)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
1,000 (999) kHz
+
–
digital voltmete
r
(VT)
(GND)
MAIN board
FMTUNING VOLTAGE ADJUSTMENT
Adjust for a 10.0 ± 0.03Vde reading on digital voltmeter.
L2 108MHz
FMTRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 87.5MHz
[65.0MHz]
CT1 108MHz

— 10 —
FM TRACKING ADJUSTMENT
CT1 L1
AM TRACKING ADJUSTMENT
L4 (FERRITE BAR ANTENNA)
AM TRACKING ADJUSTMEN
T
AM TUNING VOLTAGE ADJUSTMENT
L3
FM TUNING VOLTAGE
ADJUSTMENT
L2
AM IF ADJUSTMENT
T1
CT2
[MAIN BOARD] — SIDEA —
[MAIN BOARD] — SIDE B —
J301
C606
C701
C306 1
1
1
3
2
18
17
1
1
2
18
17
C34
CT1
CT2
R18R21
R6
S601
MD
CONTROL
RVS
REW
FWD
FF
6
FX483 MODEL
FX483 MODEL
FX485/ FX487 MODELS
EXCEPT US,CND,C&SA
FX485/ FX487 MODELS
C36
C105
C205
C37
S701
HOLD
OFF
ON
RV301
VOL
3
R19
R20
C17
C16
Q4
TP(VT)
TP
(VT)
TP(GND)
TP
(GND)
TP(ANT)
TP
(ANT)
L3
L2
T1
L1
FL1
GND VCC
DATAREMO
L4
L
R

— 11 —
SECTION 5
DIAGRAMS
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 Ωand 1/4W or less unless otherwise
specified.
•C: panel designation.
•U: B+ Line.
•H: adjustment for repair.
• Total current is measured with no cassette installed.
• Powervoltage is DC3Vand fedwith regulatedDC power
supply from external power voltage jack.
• Voltages and waveforms are DC with respect to ground
under no-signal (detuned) conditions.
no mark : FM/PB
():AM
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10
MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: FM
f: AM
E: PB
Note on PrintedWiring Board:
•Y: parts extracted from the conductor side.
•®: Through hole.
•b: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the patternface side seen from
(Conductor B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component A) the parts face are indicated.
• IC BLOCK DIAGRAMS
IC1 TA2104
24 23 22 21 20 19 18 17 16 15 14 13
DECODE
DIVIDE
VCO
1110987654321 12
FM RF OUT
RF GND FM RF IN AM IF IN FM IF IN GND AGC QUAD R-OUT L-OUTAM LOW
CUT MIX OUT VCC
RF VCC AM RF IN FM OSC AM OSC OSC OUT ST LED IF REQ DET OUT LPF1 LPF2
FM
OSC
AM
OSC
AM
MIX
FM
MIX
BUFF
BUFF
FM
RF AMIF FMIF AGC MUTE
ST/MO
FM/AM
FM
DET
AM
DET
1/8
LEVEL
DET
IF
BUFF
AF
BUFF
AF
IF
REQ
SW
ST
• Abbreviation
CND : Canadian
IT : Italian
EE : East European
FR : French
C & SA :Central and South America
• Abbreviation
CND : Canadian
IT : Italian
EE : East European
FR : French
C & SA :Central and South America

— 12 —
IC601 MM1370
20 19 18 17 16 15 14 13 12
7 8 1096541 2 3
11
OUTPUT
BIAS
CIRCUIT
CURRENT
CONTROL VELOCITY
CONTROL
START-UP •
OSCILLATION
CIRCUIT
START-UP
CONTROL
CIRCUIT
ERROR AMP
PHASE SELECT
CIRCUIT
PRE DRIVER
START-UP
LOGIC
FORWARD/REVERSE
SELECT SWITCH
GND-2 FC RI OUT VSP IN+ VREF STAR
T
COM OSC
PU
VCC
DR
U
V
W
P-GND
PV
PW
GND-1
IC301 LA4585M
28 18
29 17
16
15
14
13
12
10
8 9
11
30
31
32
33
34
35
36
25 24 23 222627 21 20
R.F
REF
REF
REF
REF
19
REF
REF
LOW
BOOST
SYS.
CONT
DET
DET
MIX.2
MIX.1
6 74 5321
PWR.C
PWR.1 PWR.2
MIX IN (R)
HP IN (R)
LP1
L.B.GAIN
M.B.ON/OFF
LP2
DET1
FWD/REV
PWR IN (R)
MIX OUT (R)
MIX OUT (L)
RIPPLE
REF
FWD (L)
FWD (R)
REV (R)
REV (L)
NF (L) NF (R) MIX IN (L) HP IN (L) SW OUT (L) SW OUT (R) PRE OUT (L) PRE OUT (R) PRE GND
PRE MUTE
POWER MUTE
PWR OUT (R)
VCC
COM
PWR GND
PWR OUT (L)
AVLS
DET2
PWR IN (L)
PRE2 PRE1
IC331 NJM2185V
14 13 12 11 10 9 8
4321 5 6 7
WEIGHT
G2 G1 V/I
BIAS
CIRCUIT
Bch BLOCK (same Ach)
VCC ON/OFF VEXT INR OUTR DCR DETR
GND IREF
VREF
INL
O
UTL
DCL
DETL
SUM
Gm
Ach BLOCK

WM-FX483/FX485/FX487
— 14 —— 13 —
5-1. BLOCK DIAGRAM
BATT IN
38
BATT DET
42
FUNCTION
KEY
S701
BAND
59
POWER
CONT
Q708
FL1
B.P.F
FM/AM RF,IF
IC1
LOCAL/DX MODEL
DC/DC
CONV.
Q401,T401
SWITCH
Q1,2
DC MOTOR
M901
BATT +B
T1
AM IFT
CF2
10.7MHz
CF1
450kHz
TUNER
VCC
450kHz
D401
D1
D3
CT1
D2
CT2
L1
FM RF
L2
FM OSC
L4
BAR ANT
L3
AM OSC
FM RF IN
2MIX OUT
4
FM IF IN
7
AM IF IN
6
FM RF
24
FM OSC
21
AM OSC
20
AM RF
22
LPF1
14 LPF2
13 IF REQ
17
L.P.F
Q704,705
VCO
BUFFER
Q4
VCO
BUFFER
Q703
OSC OUT 19
L OUT 12
R OUT 11
QUAD 10
R CH
X1
107MHz
R CH
R CH
FWD
REV
L
L
R
R
REF
FWD
28
NF
31
26
25
FWD/REV
11 SYS CONT
REC MUTE
10
PRE MUTE
9
MUTE
Q305 MUTE
Q306
Q101
5
54
13
ON/OFF
DOLBY NR
IC331
FX485/487 MODEL
AUDIO
POWER AMP
IC301
REV
20
19
MIX
HP
LB GAIN
15 MB ON/OFF
14
SW
Q301
34 1
VOLUME
RV301 PWR
AVLS
Q310
4
COM 6
3
VCC
7
REF DC
Q311
12
DET
B+
FX483
MODEL
R CH
GND
REMO
DATA
VCC
COM
L CH
Q305
Q304
TUNER
VCC
S702-715
FWD
FF
REW
RVS
OFF
ON HOLD
REG
IC702
MD
CONT
S601
SW
Q706
FM MODE
31
VCO(FM)
70
EO
65
IF REQ
61
IF IN
64
TAPE SELECT
32
VCO(AM)
71
FWD/REV
28
MUTE
62
DOLBY
27
GROOVE
48
AD IN2
43
MEGA BASS
47
AVLS
30
BEEP
49
AD IN3
44
HOLD SENS
40
HOLD
41
FWD 58
FF 57
REW 56
REV 55
RIPPLE
FILTER
Q52,53
RADIO +B
SWITCH
Q51
BATT +B
VCC 5
RADIO ON
60
TUNER
VCC
AMP CTL
46
SYSTEM CONTROL
IC701
POWER
SWITCH
Q707
OPEN DET
39
OPEN
DET
S301
3 1
POWER
AMP SW
Q307
AMP
CONT
Q308
AD REF
45
L701
D701
VDD
72
RESET
73
BATT +B
+B
MOTOR BRK
52
AMP
Q701 PHOTO
RIFLECTOR
Q702
PH701
PHOTO CTL
53
PHOTO IN
54
BRAKE
SWITCH
Q602-604 MOTOR
STSRT SW
Q608
MOTOR
SPEED SW
Q605
MOTOR
DIRECTION
Q609
TAPE
SPEED
TAPE
RV601
Q607
Q606
Q610
MOTOR CTL
51
MOTOR SPEED
25
MOTOR DIR
50
START 13
IN 15
V REF 14
DIR 3
MOTOR SERVO
IC601
U
4
V
5
W
6
Q601
522
X IN
75
X OUT
74
X701
75kHz
14
COM1 COM4 S1 S18
16
ND701
LCD
PHONES
J301
: FM
• Signal Path
• RCH is omitted
: PB
: AM J302
DC IN
DRY BATT
SIZE "AA"
(IEC DESIGNATION R6)
2PCS 3V

WM-FX483/FX485/FX487
12
A
B
C
D
E
F
G
H
I
345678910111213
— 16 —— 15 —
5-2. PRINTED WIRING BOARD — MAIN SECTION — • Refer to page 11 for Note on Printed Wiring Board.
MAIN BOARD (SIDE A) MAIN BOARD (SIDE B)
B
TO
DISPLAY BOARD
CN702
A
TO
DISPLAY BOARD
CN701
1-667-933- 11
(11)
1-667-933- 11
(11)
FX485/FX487 MODELS
US,CND,C&SA
MODELS
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION R6)
2PCS, 3V
16
L
R
L
R
HP901
(PLAYBACK HEAD)
2
6
3
4
5
1
M901
REEL/CAPSTAN
MOTOR
PH701
J301
REV
FWD
DC IN 3V
J302
C606
C701
C306 1
1
1
3
2
18
17
1
1
2
18
17
C34
CT1
CT2
R18R21
R6
S601
MD
CONTROL
RVS
REW
FWD
FF
6FX483
MODEL
FX483
MODEL
FX487 MODEL
FX485/
FX487
MODELS
EXCEPT
US,CND,C&SA
FX485/
FX487
MODELS C36
C105 C205
C37
S701
HOLD
OFF
ON
RV301
VOL
3
R19
R20
C17
C16
Q4 TP(VT) TP(GND)
TP(ANT)
L3
L2
T1
L1
FL1
GND VCC
DATAREMO
L4
L
R
D401
D402
C316
S301
(OPEN)
Ref. No. Location
D1 C-10
D2 B-9
D3 B-9
D401 H-4
D402 I-4
D701 H-11
IC1 C-9
IC301 G-9
IC331 E-5
IC601 H-9
IC702 H-11
Q1 V-4
Q2 B-5
Q4 D-10
Q51 E-11
Q52 F-11
Q53 F-10
Q101 F-9
Q201 F-9
Q301 E-4
Q304 G-9
Q305 G-9
Q306 G-9
Q307 G-3
Q308 G-3
Q310 G-8
Q311 F-4
Q401 H-5
Q601 H-4
Q602 H-4
Q603 H-4
Q604 I-3
Q605 H-8
Q606 H-8
Q607 H-3
Q608 H-3
Q609 H-4
Q610 H-3
Q701 E-2
Q702 F-2
Q707 G-3
Q708 G-3
• Semiconductor
Location

WM-FX483/FX485/FX487
— 18 —— 17 —
5-3. SCHEMATIC DIAGRAM — MAIN SECTION — • Refer to page 11 for Note on Schematic Diagram.

WM-FX483/FX485/FX487
12
A
B
C
D
E
F
G
H
I
345678910111213
— 20 —— 19 —
5-4. PRINTED WIRING BOARD — DISPLAY SECTION — • Refer to page 11 for Note on PrintedWiring Board.
(FX483/FX485)
Ref. No. Location
IC701 H-10
Q703 I-10
Q704 H-8
Q705 H-8
Q706 E-9
• Semiconductor
Location
DISPLAY BOARD (SIDE A) DISPLAY BOARD (SIDE B)
1-667-935- 11
(11)
1-667-935- 11
(11)
B
TO
MAIN BOARD
CN302
A
TO
MAIN BOARD
CN301
1
5
10
18
15
1
5
10
18
15
1
5
10
15
22
16
X701
C724C725
JC701
S715
5
S714
4
S708
SET
S707
MENU
S705
REW S704 FF
S710
TUNING
S702
/RADIO OFF
S713
3
S712
2
S711
1
S703
S706
RADIO ON
/BAND
S709
TUNING
JC701
FX483
MODEL
FX485
MODEL
E,EE
MODELS
AEP,IT,FR,EE
MODELS
E,C&SA,US,CND
MODELS
AEP,IT,FR,
C&SA,CND,US
MODELS ND701
LIQUID CRYSTAL
DISPLAY

WM-FX483/FX485/FX487
— 22 —— 21 —
5-5. SCHEMATIC DIAGRAM — DISPLAY SECTION — • Refer to page 11 for Note on Schematic Diagram.
(FX483/FX485)

WM-FX483/FX485/FX487
12
A
B
C
D
E
F
G
H
I
345678910111213
— 24 —— 23 —
5-6. PRINTED WIRING BOARD — DISPLAY SECTION — • Refer to page 11 for Note on PrintedWiring Board.
(FX487)
Ref. No. Location
IC701 G-11
Q703 I-10
Q704 H-9
Q705 H-8
Q706 F-10
• Semiconductor
Location
DISPLAY BOARD (SIDE A) DISPLAY BOARD (SIDE B)
1-667-934- 11
(11)
1-667-934- 11
(11)
16
X701
C705
1
5
10
15
22
ND701
LIQUID CRYSTAL
DISPLAY
B
TO
MAIN BOARD
CN302
1
5
10
18
15
A
TO
MAIN BOARD
CN301
1
5
10
18
15
S708
SET
S704
FF
S705
REW
RADIO OFF
S702
S703
S712
2
S711
1
S714
4
S713
3
C725
S715
5
S706
RADIO ON
/BAND
S710
TUNING
S709
TUNING
S707
MENU
AEP,IT,FR,EE
MODELS
E,C&SA,US,
CND MODELSEE,E
MODELS
AEP,IT,FR,C&SA,
CND,US
MODELS
JC701

WM-FX483/FX485/FX487
— 26 —— 25 —
5-7. SCHEMATIC DIAGRAM — DISPLAY SECTION — • Refer to page 11 for Note on Schematic Diagram.
(FX487)
,FR

— 27 —
Function
Common terminal
Segment terminal
Open
Open SPEED - CTL
Open EL - CTL
Dolby control terminal (L: ON, Hi-imp: OFF)
Head input selection terminal (L: REV, Hi-imp: FWD)
Open
AVLS control terminal (L: WhenAVLS is ON, H: OFF)
MODE control terminal
TAPE SEL control terminal (H: Cro2/MET)
GND
Destination selection
DOLBY used/ not used
GND
BATT detection terminal (L: BATT detected, H: Not detected)
Open detection terminal (L: Open)
Input when the HOLD key is pressed (L: When key is pressed)
HOLD SW detection terminal (L: When SW is ON)
Power supply voltage detection terminal (A/D input)
Key input terminal (A/D input)
Reference voltage forAD IN1 and 2
AMP control terminal (H: When AMP is ON)
MEGA BASS control terminal (L: When MEGA BASS/GROOVE is ON)
Groove control unit (H: When GROOVE is ON)
BEEP sound input terminal
Motor rotating direction control terminal (H: Reverse rotation)
Motor control terminal (H: When motor is ON)
Motor brake control terminal (H: When brake is ON)
Rotating detection circuit control terminal, PHOTO ON = L, STOP OFF, Input port
Rotation detection signal input terminal
Mechanism deck mode detection SW input terminal, ON=H
Band selection terminal (L:AM, Input port: FM)
Radio ON/OFF control terminal (H: When radio is ON)
IF request terminal (L: During auto scan) Otherwise = Input port
Mute signal output terminal (H: During MUTE ON)
Open
IF input terminal
Error out signal output terminal
+VDD
Open
Power supply GND terminal
FM local oscillator input terminal
AM local oscillator input terminal
Power supply voltage terminal
WALKMAN reset terminal (H: During operation)
5-8. IC PIN FUNCTION
Pin No.
1–4
5–22
23, 24
25
26
27
28
29
30
31
32
33
34, 35
36
37
38
39
40
41
42
43, 44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
I/O
—
—
—
—
—
O
O
—
O
O
O
—
I
I
—
I
I
I
I
I
I
I
O
O
O
O
O
O
O
O
I
I
I
I
I
O
O
O
O
—
I
O
O
—
—
—
I
I
—
—
IC701TC9327F
Pin Name
COM1–COM4
S1–S18
NC
MOTOR SPEED
NC
DOLBY
FWD/REV
NC
AVLS
FM MODE
TAPE SELECT
NC
K0, K1
K2
K3
BATT IN
OPEN DET
HOLD SENS
HOLD SW
BATT DET
AD IN2, AD IN3
AD-REF
AMP CTL
MEGABASS
GROOVE
BEEP
MOTOR DIR
MOTOR CTL
MOTOR BRK
PHOTO CTL
PHOTO IN
REV SW
REW SW
FF SW
FWD SW
BAND
RADIO ON
IF REQ
MUTE
NC
IF IN
E0
NC
HOLD
NC
GND
VCO (FM)
VCO (AM)
VDD
RESET