Sony CDX-GT24 / CDX-GT28 Service Manual ▷ View online
CDX-GT24/GT28
25
IC401 BD3442FS-E2 (MAIN Board (2/3))
1
2
BUS-L
100k
100k
100k
100k
100k
100k
250k
250k
250k
BUS-R
TU-L 3
4
TU-R
5
CD-L
6
CD-R
7
AUX-L
8
AUX-G
9
AUX-R
10
DS32
11
DS11
12
DS22
13
EBIAS
14
DS21
15
DS11
16
DS31
26 OUTF1
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 OUTF2
24 OUT-R1
23 OUT-R2
FADER
FADER
22 OUTS1
21
20
OUTS2
19
ADJ
18
SOUT
17
DATA
CLK
FADER
FADER
LPF
EFFECT
INPUT
GAIN
FADER
CDX-GT24/GT28
26
• IC Pin Function Description
MAIN BOARD IC501 R5F3640DDA08FA (SYSTEM CONTROL)
MAIN BOARD IC501 R5F3640DDA08FA (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
LCD SO
O
Liquid crystal display panel serial data signal output
2
LCD CKO
O
Liquid crystal display panel serial clock signal output
3
NOSE SW
I
Panel detection signal input
4
SIRCS
I
Remote control signal input Not used.
5
UNISO
O
SONY BUS serial data signal output
6
UNISI
I
SONY BUS serial data signal input
7
UNISCK
O
SONY BUS serial clock signal output
8
BYTE
I
Connect to ground.
9
CNVSS
I
Flash write signal input Normally operation: “L”, Flash write: “H”
10
XIN
I
Low speed operation clock signal input (32.768kHz)
11
XOUT
O
Low speed operation clock signal output (32.768kHz)
12
RESET
I
Reset signal input
13
OSCOUT
O
High speed operation clock signal output (11.06MHz)
14
VSS
—
Ground pin
15
OSCIN
I
High speed operation clock signal input (11.06MHz)
16
VCC1
—
Power supply pin (+3.3V)
17
NMI
I
External pull up pin (fi xed at “H”.)
18
DAVN
I
RDS data block cycle detection signal input
19
BUIN
I
Back up power supply detection signal input
20
CDM ON
I
CD mechanism deck power supply control request signal input
21
Z MUTE
I
Mute signal input
22 to 27
NCO
O
Not used. (Open)
28
BEEP
O
Beep signal output to power amplifi er
29
I2C SCK
O
I2C serial clock signal output
30
I2C SIO
I/O
I2C serial data signal input/output
31
FW TXD
O
Flash write interface serial data signal output Not used.
32
FW RXD
I
Flash write interface serial data signal input Not used.
33
FW CLK
I
Flash write interface serial clock signal input Not used. (Open)
34
FW BUSY
O
Flash write interface serial busy signal output Not used. (Open)
35 to 40
NCO
O
Not used. (Open)
41
EPM
O
EPM signal output (Connect to ground.)
42
RC IN1
I
Rotary commander shift key signal input (fi xed at “H”.)
43
SYSRST
O
System reset signal output
44
BUSON
O
BUS ON signal output
45
NCO
O
Not used. (Open)
46
CE
O
CE signal output Not used. (Open)
47 to 51
NCO
O
Not used. (Open)
52
CD ON
I
CD mechanism servo power supply control request signal input
53
TESTIN
I
Test mode detection signal input
54
TELATT
I
Telephone attenuate detection signal input Not used.
55
ACC IN
I
Accessory power supply detection signal input
56
ATT
O
Audio mute control signal output
57
DIAG
I
Condition signal input from power amplifi er IC
58
AMPSTB
O
Standby signal output to power regulator IC
59
VOLATT
O
Electrical volume attenuate control signal output
60
DEMO DISP SEL
I
Demonstration mode display setting signal input “H”: SUPPOR display, “L”: No display
61
R/S SW SEL
I
REAR SUB selection setting terminal “H”: switched, “L”: No switched
62
VCC2
—
Power supply pin (+3.3V)
63
NCO
O
Not used. (Open)
64
VSS
—
Ground pin
65
ILLUMI SEL
I
Illumination voltage setting signal input for panel “H”: 10.4V, “L”: 9V
66
DEMO SEL
I
DEMO select signal input “H”: DEMO on
67
DIM SEL
I
Dimmer function setting signal input “L”: No dimmer
68
B OUT SEL
I
Black out setting signal input “L”: No block out
CDX-GT24/GT28
27
Pin No.
Pin Name
I/O
Description
69
AREASEL 3
I
Destination setting pin 3
70
AREASEL 2
I
Destination setting pin 2
71
AREASEL 1
I
Destination setting pin 1
72
AREASEL 0
I
Destination setting pin 0
73 to 80
NCO
O
Not used. (Open)
81
RE IN1
I
Rotary encoder signal input 1
82
RE IN0
I
Rotary encoder signal input 0
83
NCO
I
Not used. (Open)
84
CYRIL SEL
I
Cyril correspondence discrimination signal input
“H”: Correspondence, “L”: No correspondence
“H”: Correspondence, “L”: No correspondence
85
TU ATT
O
Tuner mute control signal output Not used. (Open)
86
NCO
O
Not used. (Open)
87
RDS ON
O
RDS IC power supply control signal output
88 to 90
NCO
O
Not used. (Open)
91
KEYACK0
I
Key Acknowledge detection signal input (Rotary command signal input) Not used.
92
KEYACK1
I
Key Acknowledge detection signal input (Front panel signal input)
93
VSM
I
S meter voltage detection signal input
94
KEYIN1
I
Key signal input 1
95
KEYIN0
I
Key signal input 0
96
AVSS
—
Ground pin for A/D converter
97
RC IN0
I
Rotary commander key signal input Not used.
98
AVRH
—
A/D converter external reference power supply pin (+3.3V)
99
AVDD
—
A/D converter power supply pin (+3.3V)
100
LCD CE
O
Liquid crystal display panel chip enable signal output
28
CDX-GT24/GT28
SECTION 5
EXPLODED VIEWS
1
X-2186-975-1 PANEL
ASSY,
SUB
2
3-042-244-11 SCREW
(T)
3
X-2108-670-1 LOCK
ASSY
(S)
4
3-376-464-11 SCREW (+PTT 2.6X6), GROUND POINT
5
A-1553-894-A MAIN BOARD, COMPLETE
6
1-776-527-33 CORD (WITH CONNECTOR) (ISO) (POWER)
FU601
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) 10A
#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
5-1. MAIN
SECTION
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
Example:
KNOB, BALANCE (WHITE) . . . (RED)
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color Cabinet’s Color
• Accessories are given in the last of this
parts list.
The components identifi ed by mark
0
or dotted line with mark
0 are critical for
safety.
Replace only with part number specifi ed.
Replace only with part number specifi ed.
not supplied
not supplied
FU601
not supplied
not supplied
not supplied
#1
#1
#1
#3
#4
#4
#5
#3
#2
#1
"
"
#
#
1
2
3
4
6
"
5
MG-101L-188//Q
Click on the first or last page to see other CDX-GT24 / CDX-GT28 service manuals if exist.