Sony CDX-M20 Service Manual ▷ View online
CDX-M20
CDX-M20
21
21
BOARD
CN101
MAIN
(3/3)
A
IC B/D
2.6
5.1
2.6
2.6
1.7
3.4
5.2
0
2.6
3.3
0
4.8
0
0
5.1
0
5.1
5.2
5.1
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
5.1
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
560
R944
LSW905
3
1
2
4
5
6
VCC
OUT
GND
IC902
1
2
3
LSW903
3
1
2
4
5
6
820
R943
LSW901
3
1
2
4
5
6
0.47
C973
1M
R973
LSW904
3
1
2
4
5
6
470
R945
LSW907
3
1
2
4
5
6
LSW902
3
1
2
4
5
6
LSW908
3
1
2
4
5
6
LSW906
3
1
2
4
5
6
NESW505DT-A0-UV
LED931
470
R946
0
R977
RT1N140C-TP-1
Q931
J901
FB903
0
FB904
0
FB905
0
S908
2
4
5
3
1
6
7
S901
S902
S907
S906
S905
S904
S903
SCM015BC7TT86P
LED941
SCM015BC7TT86P
LED942
SCM015BC7TT86P
LED943
SCM015BC7TT86P
LED944
SCM015BC7TT86P
LED945
SCM015BC7TT86P
LED946
SCM015BC7TT86P
LED951
LCD901
1
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 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
52
2
4
49
51
3
50
0
R979
DA2J10100L
D973
470
R974
470
R975
470
R976
R958
1k
18p
C985
18p
C986
18p
C987
1k
R984
820
R985
0.1
C971
0.1
C974
0.1
C975
0.1
C976
1k
R941
1k
R942
D972
RKZ5.1B2KGP1
RKZ6.8B2KGP1
D906
RKZ6.8B2KGP1
D907
RKZ6.8B2KGP1
D910
RKZ18B2KGP1
D914
RKZ6.8B2KGP1
D941
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
15P
CN901
D-GND
KEY-GND
AUX-LCH
AUX-RCH
AUX-GND
RE-0
RE-1
KEY-1
KEY-0
SIRCS
LCD-DATA
LCD-CE
LCD-CLK
ILL+B
PANEL
RT1N140C-TP-1
Q978
1.5k
R986
PT6587-LQ
IC901
1
DIMMER
2
BACKLIGHT
3
COLOR1
4
P4/S4
5
S5
6
S6
7
S7
8
S8
9
S9
10
S10
11
S1
1
12
S12
13
S13
14
S14
15
S15
16
S16
17
S17
18
S18
19
S19
20
S20
21
S21
22
S22
23
S23
24
S24
25
S25
26
S26
27
S27
28
S28
29
S29
30
S30
31
S31
32
S32
33
S33
34
S34
35
S35
36
S36
37
S37
38
S38
39
S39
40
S40
41
S41
42
S42
43
S43
44
S44
45
S45
46
S46
47
S47
48
S48
49 S49
50 S50
51 S51/COM4
52 COM3
53 COM2
54 COM1
55 S52
56 VDD
57 VDD1
58 VDD2
59 VSS
60 S53/OSCI
61 INH
62 CE
63 CL
64 DI
LED947
SCM015BC7TT86P
470
R953
SCM015BC7TT86P
LED950
R957
470
R950
470
R949
470
R948
470
R947
470
120
R931
120
R933
120
R932
R921
180
1.2k
R912
1.5k
R913
1k
R911
R923
180
R924
180
1.8k
R914
2.2k
R915
3.3k
R916
R926
180
R927
470
3.9k
R917
6.8k
R918
R928
470
150
R972
150
R971
100
R978
0
R908
820
R901
1k
R902
1k
R903
1.2k
R904
820
R905
1k
R906
SEG12
COM4
SEG27
SEG5
SEG15
SEG8
COM3
SEG39
SEG25
COM2
COM1
SEG1
1
SEG31
COM4
SEG24
SEG4
SEG7
SEG45
SEG14
SEG3
SEG2
SEG38
SEG30
SEG23
SEG48
SEG33
SEG23
SEG44
SEG13
SEG43
SEG31
SEG2
SEG20
SEG10
SEG33
SEG17
SEG37
SEG21
SEG34
COM3
SEG22
SEG32
SEG27
SEG19
SEG30
SEG9
SEG47
SEG32
SEG16
SEG26
SEG24
SEG42
SEG18
SEG36
COM2
SEG29
SEG4
SEG22
SEG46
CLK
SEG25
SEG36
SEG41
SEG1
SEG28
SEG35
SEG29
SEG21
SEG3
CE
SEG34
SEG35
SEG28
SEG6
SEG40
COM1
SEG26
SEG37
SEG38
SEG39
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG1
1
SEG12
SEG13
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG14
SEG1
DATA
SEG48
CLK
CE
DATA
(LCD BACK LIGHT)
PNJ4813M01S0
REMOTE CONTROL
IC902
LIQUID CRYSTAL DISPLAY
MODE
SEEK+
SCRL
DSPL
PAUSE
6
5
4
SHUF
3
REP
1
ALBUM
2
ALBUM
PTY
CAT
(VOLUME)
ENCODER
ROTARY
PUSH SELECT
MODE
LIQUID CRYSTAL DISPLAY DRIVER
IC901
SEEK+
KEY BOARD
RECEIVER
SEEK–
EQ3
AUX
SEEK–
OFF
SOURCE
SOURCE
OFF
EQ3
ILLUMINATION
RING
DISC SLOT
INDICATOR
DIMMER CONTROL
LED DRIVE
16
8
I
14
2
15
12
A
D
5
B
7
C
6
11
3
H
F
13
G
9
E
10
1
J
4
17
4-6. SCHEMATIC DIAGRAM - KEY Board -
• See page 22 for IC Block Diagrams.
Note: Refer to the servicing notes “NOTE FOR REPLACEMENT OF THE
AUX JACK (J901)” (See page 4), if replacing the Ref. No. J901.
(Page
19)
CDX-M20
CDX-M20
22
22
• IC Block Diagrams
– MAIN Board –
IC301 TDF8556AJ/N5
IC401 BD3447AFV-E2
MUTE
MUTE
ENABLE
LOGIC
STANDBY/
MUTE
CHIP DETECT/
DIAGNOSTIC
PROTECTION/
DIAGNOSTIC
SWITCH
REGULATOR
SWITCH
REFERENCE
VOLTAGE
LOAD DUMP
PROTECTION
TEMPERATURE
PROTECTION
BACK-UP
SWITCH
REGULATOR
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
TAB
OUT-FL–
OUT-FL+
OUT-RL–
OUT-RL+
IN-RL
S-GND
IN-RR
OUT-RR+
OUT-RR–
OUT-FR+
OUT-FR–
DIAG
ANT-REM
AMP-REM
SERVO+3.3V
MECHA+6V
VP
BU+B
I2C_SIO
I2C_SCK
VP2
P-GND1
SVR
IN-FL
IN-FR
BEEP
P-GND3
VP1
STB
P-GND4
RST
CRES
AUDIO+B
(8.5V)
(8.5V)
GND
PANEL+B
CBU
FL
RL
RR
VP
FR
I
2
C BUS
21
22
29
30
23
24
40
FIL
GND
SDA
SCL
OUT
-FR
OUT
-FL
OUT
-RR
OUT
-RL
SUB-R
SUB-L
SAOUT
SADA
MIN1
MIN2
EBIAS2
DS2-R
DS1-R
DS3-R
SACLK
39
38
37
VCC
36
27
28
25
26
31
32
33
34
35
20
19
12
11
18
17
1
BUS-R
BUS-L
TU-R
TU-L
CD-L
AUX-R
AUX-G
AUX-L
PD-R
PD-G
PD-L
FP1
FN2
FP2
EBIAS1
DS2-L
DS1-R
DS3-R
FN1
2
3
4
CD-R
5
14
13
16
15
10
9
8
7
6
I2C BUS
LOGIC,
VCO
FADER
FADER
FADER
HPF
LPF
GND
ISO AMP
GND
ISO AMP
180
q/0q
3 BAND P-EQ (TONE CONTROL)
7 BAND
SPECTRUM ANALYZER
/LEVEL METER
EFFECT
VOLUME/MUTE
INPUT GAIN
INPUT SELECTOR (3 SIGLE-END AND 3 STEREO IS O)
FADER
FADER
SPEANA
LVL METER
LVL METER
SPEANA
GND
ISO AMP
GND
ISO AMP
GND
ISO AMP
GND
ISO AMP
IC402 MM1836A33NRE
VOUT
4
CONT 1
GND 2
NC 3
VIN
5
+
–
VOLTAGE
REFERENCE
REGULATOR
CURRENT
LIMIT
THERMAL
SHUTDOWN
BIAS
CDX-M20
23
– KEY Board –
IC901 PT6587-LQ
1 2 3 4 5 6 7 8 9 10 11 12
25
26
27
28
17
18
19
20
21
22
23
24
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
53
54
54
55
56
57
58
59
60
61
62
63
64
13 14 15 16
29
30
31
32
COM2
COM1
COM1
51
52
52
COM4
COM3
COM3
SEG51
SEG52/OSC
CS
CLK
SI
VDD
VLCD1
VLCD2
VSS
GP1/SEG1
GP2/SEG2
GP3/SEG3
GP4/SEG4
GP5/SEG5
GP6/SEG6
GP7/SEG7
GP8/SEG8
SEG9
SEG10
SEG1
1
SEG12
SEG13
SEG14
SEG15
SEG16
SEG48
SEG47
SEG46
SEG45
SEG44
SEG43
SEG42
SEG41
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEGMENT
DRIVER & LA
TCH
SHIFT
REGISTER
COMMON
DRIVER
CLOCK
GENERATOR
ADDRESS
DETECTOR
INHB
49
SEG49
50
SEG50
24
CDX-M20
SECTION 5
EXPLODED VIEWS
1
X-2581-176-1 PANEL
ASSY,
SUB
2
3-042-244-11 SCREW
(T)
3
X-2547-583-3 LOCK
ASSY
(T)
4
2-050-124-02 SCREW +BTT 2.6X5.2
5
A-1850-912-A MAIN BOARD, COMPLETE
6
1-839-372-11 CONNECTION CORD FOR AUTOMOBILE
(POWER)
7
2-590-307-03 SHEET,
COVER
8
2-683-516-01 CAP
(AUX)
FU301
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10 A/32 V)
TU1
A-1832-182-A TUX-DSP02 (FM/AM Tuner unit)
#1
7-685-792-09 SCREW +PTT 2.6X6 (S)
#2
7-685-790-01 SCREW +PTT 2.6X4 (S)
#3
7-685-793-09 SCREW +PTT 2.6X8 (S)
#4
7-685-794-09 SCREW +PTT 2.6X10 (S)
#5
7-685-134-19 SCREW +P 2.6X8 TYPE2 NON-SLIT
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
Note:
• -XX and -X mean standardized parts, so
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Items marked “*” are not stocked since
they are seldom required for routine ser-
vice. Some delay should be anticipated
when ordering these items.
vice. Some delay should be anticipated
when ordering these items.
• The mechanical parts with no reference
number in the exploded views are not sup-
plied.
plied.
• Color Indication of Appearance Parts Ex-
ample:
KNOB, BALANCE (WHITE) . . . (RED)
Parts Color Cabinet’s Color
5-1. MAIN SECTION
The components identifi ed by mark 0
or dotted line with mark 0 are critical for
safety.
Replace only with part number specifi ed.
or dotted line with mark 0 are critical for
safety.
Replace only with part number specifi ed.
Les composants identifi és par une marque
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce por-
tant le numéro spécifi é.
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce por-
tant le numéro spécifi é.
not supplied
not supplied
MAIN board
TU1
FU301
not supplied
front panel section
not supplied
not supplied
#1
#1
#1
#3
#4
#4
#4
#5
#5
#3
#2
#1
A
B
B
1
2
3
4
6
8
7
A
5
MG-101X-188
not supplied
Click on the first or last page to see other CDX-M20 service manuals if exist.