Sony CDX-GT828U / CDX-GT870US / CDX-GT878US Service Manual ▷ View online
CDX-GT828U/GT870US/GT878US
CDX-GT828U/GT870US/GT878US
29
29
5-10. SCHEMATIC DIAGRAM – SUB Section –
LED701
LED702
BP701
R704
R703
CN702
CN701
S701
R702
R701
D702
D701
FFC701
(Page 27)
(Page 31)
CDX-GT828U/GT870US/GT878US
CDX-GT828U/GT870US/GT878US
30
30
5-11. PRINTED WIRING BOARDS – KEY Section –
• See page 18 for Semiconductor Location. •
: Uses unleaded solder.
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
FB902
FB9
01
BRN
RED
ORG
FB9
03
J901
AUX
LED903
S903
S904
S905
S906
R801
S907
R847
S911
S908
S910
LED904
LED906
LED910
LED915
S916
LED914
LED911
LED912
LED909
LED916
S91
4
S913
S915
S909
S912
LED901
LED
920
LED919
LED917
LED918
R848
LED908
R861
LED907
LED902
IC903
1
2
4
3
S902
LED913
R868
R845
R846
IC905
LF901
RB909
RB908
RB907
RB906
RB905
RB904
RB903
RB902
R884
R883
R886
R885
R887
R888
R889
R890
RB910
RB911
RB912
RB913
D904
D903
D901
C901
C921
D902
D905
FB9
05
FB9
04
R891
R916
R917
Q909
Q90
8
R849
R85
0
R851
IC904
R852
Q901
R910
R924
S901
R91
1
R858
ORG
RED
BRN
IC901
D918
R89
5
R859
R876
R912
R829
R839
X901
R854
R821
R913
R853
R905
R857
C912
C911
C915
R882
R873
C910
R832
R900
Q905
R802
R909
R870
R904
C917
R902
R875
RB901
R824
R874
R869
R914
R877
R879
C918
R841
C916
R865
C906
R838
R866
R836
R837
R860
R823
CN901
24
13
1
12
2
CN902
(USB)
S901
FRONT PANEL
OPEN/CLOSE
DETECT
6
5
4
3
1
R903
R894
R827
GT878US
R833
R835
R855
R843
R872
R893
R899
R898
R881
R897
R878
R892
C902
R831
C903
C909
C920
R811
R813
R864
R817
R901
R863
D914
IC902
R822
R819
Q911
R922
Q91
0
R92
0
R921
R826
R825
Q904
D907
R862
R828
R830
D917
D911
D91
3
D909
D906
D912
D915
R896
D908
R91
5
D910
R856
R834
R842
R805
R803
R808
R806
R867
C914
D916
Q903
Q902
R840
R804
R810
R814
R809
R844
R807
R812
R925
R923
R880
R907
R906
R926
R927
R928
R929 R930
R931
R932
R908
R820
R816
R81
8
R815
R871 R933
CN902
FL901
FLUORESCENT INDICATOR TUBE
R884,886,916
(GT828U/GT870US)
Q908,909,
R883,917
(GT878US)
/LIST/
BROWSE
LED906,S913
IC903
S911,LED910
S902,LED909
S903,LED912
S904,LED911
S905,LED914
S906,LED913
S907,LED916
OFF
LED904,S914
/BACK
LED917–920
(RING ILLUMINATION)
1/REP
2/SHUF
3/ALBUM –
4/ALBUM +
5/DM+
6/PAUSE
S908,LED915
DSPL/SCRL
(GT828U)
(GT870US/GT878US)
DSPL
LED903,S915
LED907,S912
LED908,S909
SOURCE
LED902,S916
LED901,S910
MODE
AF/TA/PTY
(GT828U)
(GT870US/GT878US)
SCRL
N
SEEK–
.
SEEK+
1-875-740-
(11)
11
1-875-738- (11)
11
1-875-738- (11)
11
1-875-740- (11)
11
RE901
PUSH ENTER/SOUND/MENU
B
SUB BOARD
CN701
(Page 28)
CDX-GT828U/GT870US/GT878US
CDX-GT828U/GT870US/GT878US
31
31
5-12. SCHEMATIC DIAGRAM – KEY Section –
• See page 21 for Waveforms. • See page 33 for IC Block Diagrams. • See page 36 for IC Pin Function Description of IC901.
IC B/D
R902
D904
D901
D916
Q910
R92
9
R930
R93
1
R932
R90
9
R870
R871
R871
R908
C902
R911
R910
Q911
C903
CN901
FB901
FB902
FB903
FB902
FB903
S901
R867
R866
C910
R877
R874
R933
R873
R87
6
R91
2
R890
C916
C91
7
C918
R926
R927
R928
C921
R891
LED903
LED901
LED902
LED906
LED904
LED907
LED908
LED909
LED910
LED911
LED912
LED913
LED914
LED915
LED916
R868
R816
R913
R818
R820
R801
R803
R805
R807
R804
R806
R808
R923
R925
R809
R811
R813
R810
R812
R814
R815
R817
R819
R802
R895
R915
R821
R823
R825
R822
R824
R826
R827
R829
R831
R828
R830
R832
R833
R835
R837
R834
R836
R838
R839
R841
R840
R842
R843
R844
R845
R847
R846
R848
LED918
LED920
LED919
LED917
C901
R924
D905
D902
D903
R851
R852
FB905
FB904
R850
R849
R872
C909
C909
C911
R875
R916
R917
R879
R878
C914
R901
R900
R893
R892
R899
R898
R896
R897
C912
R894
R922
R869
R920
R921
R881
R884
R886
R883
R880
R882
R906
R907
C920
C915
S902
S903
S904
S905
S906
S907
S908
S914
S913
S912
S911
S910
S909
R859
R860
R861
R862
R863
R864
R858
R857
R856
R855
R854
R853
R865
R914
S915
S916
R887 R888 R889
LF901
IC903
IC902
J901
Q901
CN902
Q902
Q903
Q904
Q905
R903
R905
R904
X901
Q908
Q909
RB901
RB902
RB903
RB904
RB905
RB906
RB907
RB908
RB909
RB910
RB911
RB912
RB913
IC904
D907
D915
D914
D915
D914
C906
D908
D912
D912
D911
D913
D910
D909
D906
D913
D910
D909
D906
RE901
D917
D918
IC905
R885
FL901
IC901
(Page 29)
CDX-GT828U/GT870US/GT878US
CDX-GT828U/GT870US/GT878US
32
32
• IC Block Diagrams
IC300 TDA8588AJ/N2/R1 (MAIN Board (1/4))
MUTE
MUTE
ENABLE
LOGIC
STANDBY/
MUTE
BATTERY
DETECTION
CHIP DETECT/
DIAGNOSTIC
PROTECTION/
DIAGNOSTIC
SWITCH
REGULATOR
SWITCH
REFERENCE
VOLTAGE
LOADDUMP
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
SERVO3.3V
MECH6V
VP
BU+B
SDA
SCL
VP2
PGND1
SVR
IN–FL
IN–FR
BEEP
PGND3
VP1
STB
PGND4
RST
CRES
AUDIO+B
GND
PANEL+B
CBU
FL
RL
RR
VP
FR
I
2
C BUS
IC601 BA8271F-E2 (MAIN Board (1/4))
1
2
3
4
5
6
5
6
7
8
9
10
14
13
12
11
12
11
BUS ON
SWITCH
RESET
SWITCH
BATTERY
SWITCH
BUS.ON
RST
BATT
CLK
VREF
GND
VCC
RST
BUS.IN
CLK-IN
B/U-C
BUS.IN
CLK-IN
B/U-C
DATA IN
DATA OUT
DATA I/O
IC50 TDA7333013TR (CDX-GT828U only) (MAIN Board (2/4))
1
2
BUS-RCH
100k
100k
100k
100k
100k
100k
250k
250k
250k
BUS-LCH
TU-RCH 3
4
TU-LCH
5
CD-RCH
6
CD-LCH
7
AUX-RCH
8
AUX-GND
9
AUX-LCH
10
DS3-L
11
DS1-L
12
DS2-L
13
EBIAS
14
DS2-R
15
DS1-R
16
DS3-R
26 OUT-FR
27 VCC
VCC
VCC2
28 MUTE
29 SCL
30 SDA
31 GND
32 FIL
INPUT
SELECTOR
VOLUME1
/MUTE
VOLUME2
I2C
BUS
LOGIC
TREBLE
/BASS
/MIDDLE
SPECTRUM
ANALYZER
FADER
25 OUT-FL
24 OUT-RR
23 OUT-RL
FADER
FADER
22 SUBOUT-R
21
20
SUBOUT-L
19
ADJ
18
SAOUT
17
SADA
SACLK
FADER
FADER
LPF
EFFECT
INPUT
GAIN
FADER
VDDA
INTERPOLATOR
RAM
BUFFER
&
CONTROL
LOGIC
TEST LOGIC
&
PIN MUX'S
I
2
C/SPI
INTERFACE
BAND PASS
FILTER
SIGMA DELTA
CONVERTER
SINC4
FILTER
REF3
REF2
REF1
VSS
VDDD
RESETN
TM
1
MPX
16
CSN
SDAOUT
RDSREG
3
INTN
MPX
SINC4REG
SDAIN
SCK
SCK
SPI
TESTREG
TESTREG
14
2
3
4
5
6
7
8
INTN
15
SA
13
SDA
12
SCL
11
OSCILLATOR
XTO
10
XTI
9
RDS
DEMODULATOR &
SYNCHRONIZATION
2
IC401 BD3442FS-E2 (MAIN Board (2/4))
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