Sony CDX-GT720 / CDX-GT72W / CDX-GT770 Service Manual ▷ View online
CDX-GT72W/GT720/GT770
21
4-4. Operating hours display mode
4-5. CD error information display mode
4-5-1. Error description
4-5-1. Error description
4-5-2. Disc type and operating hours
The display mode is switched by each rotation of [+] or [–] keys
during the CD error information display mode.
during the CD error information display mode.
Error information
Indication
Description
1X
SERVO ERROR
3X
LOADING ERROR
4X
TRACK JUMP
5X
TEXT ERROR
FX
MECHA ERROR
9999
Operating hours
(in hexadecimal format)
(in hexadecimal format)
Diag code
04: Operating hours
04: Operating hours
DIAG
99
Error description
(in hexadecimal
format)
(in hexadecimal
format)
Recency of information
1-3: 1 represents the latest.
1-3: 1 represents the latest.
Diag code
05: CD error information
05: CD error information
DIAG
99999
DIAG
Operating hours
Recency of information
1-3: 1 represents the latest.
1-3: 1 represents the latest.
Diag code
05: CD error information
05: CD error information
Disc type
99
99999
99
99999
99
99999
CD error info history 1 (latest)
Error description plus error details display
Error description plus error details display
CD error info history 3
Disc type plus operating hours display
Disc type plus operating hours display
CD error info history 3
Error description plus error details display
Error description plus error details display
CD error info history 2
Disc type plus operating hours display
Disc type plus operating hours display
CD error info history 2
Error description plus error details display
Error description plus error details display
CD error info history 1 (latest)
Disc type plus operating hours display
Disc type plus operating hours display
DIAG
DIAG
DIAG
DIAG
DIAG
DIAG
Disc type
Indication
Disc type
0
MP3
1
WMA
2
AAC
3
ATRAC
8
CD/DA
F
UNKNOWN
CDX-GT72W/GT720/GT770
22
4-6. OFFSET/FAILURE error display mode
The display mode is switched by each rotation of [+] or [–] keys
during the OFFSET/FAILURE error display mode.
during the OFFSET/FAILURE error display mode.
99999
Operating hours
Recency of information
1-3: 1 represents the latest.
1-3: 1 represents the latest.
Diag code
06: OFFSET/FAILURE
06: OFFSET/FAILURE
Error description
(0: OFFSET, 1: FAILURE)
(0: OFFSET, 1: FAILURE)
DIAG
99999
99999
99999
OFFSET/FAILURE error history 1 (latest)display
OFFSET/FAILURE error history 3display
OFFSET/FAILURE error history 2display
DIAG
DIAG
DIAG
CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
23
23
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM – MAIN Section –
DISPLAY
SECTION
A
DISPLAY
SECTION
B
• Signal Path
• R-CH is omitted due to same as L-CH.
: CD PLAY
: FM
: BUS
: AUX
: AM
J991
AUX
AUX R-CH
PLAG IN
1 ANT
SCL
SDA
SDA
CDMON
CDON
CDON
9 AUX-LCH
ELECTRONIC VOLUME
IC401
4V PRE AMP
IC402
PJ501
(ANTENNA)
TUX501
(TUNER UNIT)
I2C BUS CONTROLLED POWER AMP/
MULTIPLE VOLTAGE REGULATOR
IC201
SYSTEM CONTROL
IC303 (1/2)
CNP101
7 AUX-RCH
BATT
6 CD-LCH
5 CD-RCH
5 CD-RCH
6
S-METER
7
TU MUTE
16
E2P SCL
17
E2P SDA
83 VSM
5
QUALITY
82 QUALITY
16 CDM ON
49 CD ON
50 Z DET
49 CD ON
50 Z DET
11
VDD+5V
4
L-CH
3
R-CH
BU+3.3V
10
VCC
21 TUNER ATT
23 EECKO
22 EESIO
23 EECKO
22 EESIO
CD ON
CDM ON
CD L
CD R
4 TU-LCH
3 TU-RCH
3 TU-RCH
CD-RCH
TU-RCH
AUDIO+8.3V
AUDIO+8.3V
19
SOUT
18
DATA
17
CLK
5
3
3
OUT FL+
OUT FL–
9
7
7
OUT RL+
OUT RL–
29
27
27
AMP REM
R-CH
ANT REM
BATT
30
37
37
AUDIO+B
35
VP
20
VP1
6
VP2
BU+B
31
33
33
SERVO3.3V
MECHA6V
34
ILL
28
MUTE
SOUT
E DATA
E CLK
E MUTE
2 SDA
AUDIO+8.3V
BU+5V
SERVO+3.3V
MECHA+6V
ILL+10V
BU+5V
SERVO+3.3V
MECHA+6V
ILL+10V
4 SCL
SDA
SCL
SCL
16 AC_GND
22 STB
25 DIAG
22 STB
25 DIAG
13
7
10
12
11
16
1
9
9
2
4
3
5
6
6
29
30
30
SCL
SDA
SCL
SDA
SCL
SDA
35
E MUTE
ATT
27
I2C CKO
28
25
I2C SIO
57
BU IN
12 IN FL
FL+
FL–
FL–
RL+
RL–
RL–
FR+
FR–
RR+
RR–
FR–
RR+
RR–
AMP-REM
ANT-REM
ANT-REM
ACC
11 IN RL
MUTE
Q171
AUDIO OUT
FRONT
MUTE CONTROL
SWITCH
Q401,402
5
UNI SI
73
UNI SO
4
UNICKO
3
BUS ON
56
SYS RESET
12
B CHK
11
DATA OUT
10
DATA IN
8
CLK IN
9
BUS ON
13 RST
RESET
STBY
STBY
3
5
6
6
8
4
2
3
3
1
BATT
CLK 4
DATA I/O
1
BUS ON
2
RST
SYSRST
LINK OFF
52
ACC IN
ACCESSORY CHECK
Q102
BATT
BATT
BATTERY
CHECK
Q101
BUS INTERFACE
IC110
MUTE
Q470
MUTE
Q181
D401
F901
R-CH
(FRONT)
25
26
26
OUTF1
OUTF2
21
OUTS1
R-CH
(REAR)
IC470
23
24
24
OUTR2
19
OUT(RL)
3
OUT(FL)
17 RL+
5 FL+
OUTR1
R-CH
L
R
PJ401 (2/2)
(REAR)
(FRONT)
AUDIO OUT
REAR
R-CH
L
R
SUB OUT
(MONO)
L
R
BUS
CONTROL IN
D301
D128
D105
TH100
CNP102
7
BATT
TUNER+5V
REG
Q501
15
E2PVDD
13
TU-SCL
14
TU-SDA
BU+5V
BU+3.3V
REG
IC301
ILL
51
ILL IN
ILLUMINATION CHECK
Q121
TEL ATT
53
TEL ATT
TELEPHONE ATTENUATE
CHECK
Q103
14
40
AMP DIAG
41
AMPSTB
20
BEEP
85
SP IN
36
E DATA
37
E CLK
E MUTE
SOUT
E DATA
E CLK
BUS
AUDIO
IN
BUS-RCH
L
R
PJ401 (1/2)
2 BUS-LCH
1 BUS-RCH
1 BUS-RCH
BUS-RCH
CD-RCH
AUX-RCH
TU-RCH
ZMUTE
47 EJECT OK
EJECT OK
46 OPEN REQ
OPEN REQ
Z MUTE
SYS RST
MECHA+6V
BU+3.3V
BU+3.3V
SERVO+3.3V
BU IN
UNI SI
UNI SO
DR+6V
BU+3.3V
A+3.3V
D+3.3V
CDON
CDMON
EJECT OK
A ATT
OPEN REQ
BUS ON
UNI CLK
LINK OFF
SYS RST
BU CHK
UNI SI
UNI SO
OPEN REQ
BUS ON
UNI CLK
LINK OFF
CD
MECHANISM
UNIT
(MG-101FC)
6
BU CHK
UNI CLK
BUS ON
UNI SI
UNI SO
D402
LINK ON/OFF
SWITCH
Q112
BUS ON/OFF
SWITCH
Q110,111
ZMUTE
EJECT OK
(Page 24)
(Page 24)
CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
24
24
5-2. BLOCK DIAGRAM – DISPLAY Section –
MAIN
SECTION
A
MAIN
SECTION
B
STBY
84
93
98
99
98
99
88
11
13
9
8
SYSTEM CONTROL
IC303 (2/2)
DC–DC
CONVERTER
IC620
DISPLAY CONTROL
IC901
KEY IN0
SYS SO
SYS SI
SYS SI
DISP CE
LAT TA2 OUT
VDD1
VDD2
FL DAT1
FL DAT2
FL DAT3
FL DAT2
FL DAT3
FL CLK
FL CLK IN
FL CLK OUT
GCP TAO OUT
BK TA3 OUT
GCP TA4 IN
DISP SI RX
DISP SO TX
24
71
PLAG IN
26
BLINK
92
ILL RED
KEY ACK0
78 RE 0
77 RE 1
77 RE 1
XOUT
XIN
XCOUT
XCIN
RC IN0
KEY ACK2
KEY ACK2
10
80
RESET
TEMP TR
MOT+
29
1
30
100
SYS CLK
DISP CKO
31
SYS CE
KEY 2
86
85 KEY 1
LAT
FL VDD+3.3V
FL VDD+55V
FL+4.8V
FL+1.4V
SI1
SI2
SI3
CLK
SI2
SI3
CLK
7
90
CNVSS
RESET
RESET
FL VDD+3.3V
PLAG IN
D303
CNVSS
DISP RESET
91
NOSE SW
7
10
XOUT
XIN
11
13
BU+3.3V
2
FSW IN
58
FSW OUT
74
FLD ON
BU+3.3V
FIN
RIN
PGND
BATT
BU+5V
X301
32.768kHz
X302
6MHz
X901
6.75MHz
S901
(NOSE DET)
KEY PUSH
78
KEY
MATRIX
ENC901(2/2),
S911–919
ROTARY
ENCODER
ENC901 (1/2)
RESET
RESET
IC302
RC IN1
ILL+10V
LED901–907,928,930
LED920–923
7
LED DRIVE
Q923
LED DRIVE
Q920,921,924
S902
RESET
FL900
FLUORESCENT
INDICTOR TUBE
4
7
F2
1
I
3
F1
19
I
21
89
SIRCS
CT
BATT
BATT
OUT
IN
FB
5
VCC
72
FL ON
6
4
1
2
2
CS
91
ILL BLUE
90
ILL GREEN
64
3
9
7
7
1
MOT–
65
4
FP IDET
OUT1
OUT2
OUT2
VCC
79
6
MOTOR ON
63
P SNSR
68
CLOSE SW
66
OPEN SW
67
1 DST SEL0
95 DOOR IND
FL VDD+3.3V
S301
FREQUENCY
SELECTOR
BU+3.3V
GT770
9
33
16
99
17
3
18
35
15
5
100
GCP
28
11
BK
8
22
19
19
55
86
87
86
87
T620
DC–DC
CONVERTER
TRANSFORMER
D623
D620,621
D622
FL+4.8V
FL+1.4V
FL VDD+55V
TRANS
SWITCHING
DRIVE
Q620
TH301
OPEN/CLOSE
MOTOR DRIVE
IC702
CNJ101
(REMOTE IN)
TRANS ON/OFF
DETECT
SWITCH
SWITCH
Q641
DC–DC
CONVERTER
CONTROL
Q621,622
FL ON/OFF
CONTROL
SWITCH
Q624
B+ CONTROL
SWITCH
Q623,642
FL B+
SWITCH
Q301,302
MOTOR+9V
REG
IC703
MOTOR ON/OFF
SWITCH
Q702,703
PULSE SENSOR
DETECT
Q701
SWITCH
BOARD
FP I DET
AMP
IC701
DOOR INDICATOR
CONTROL SWITCH
Q134
LED990
CD
INDICATOR
REMOTE CONTROL
SIGNAL RECEIVER
IC903
NOSE SW
DETECT SWITCH
Q303
M904
(OPEN/CLOSE)
10K
9K
(Page 23)
(Page 23)
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