Sony CMT-EH55DAB / HCD-EH55DAB Service Manual ▷ View online
HCD-EH55DAB
33
Pin No.
Pin Name
I/O
Description
63
TMODE
I
Not used
64
DVDDIO
-
Power supply terminal (+3.3V)
HCD-EH55DAB
34
PANEL BOARD IC701 MB90F831PF-G-SPE1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
LED
O
LED drive signal output terminal for liquid crystal display back light "H": LED on
2
CD OPEN/CLOSE
I
CD lid open/close detection switch input terminal "L": CD lid is closed, "H": CD lid is opened
3
REQ
I
Request signal input from the CD-MP3 processor
4
MMUT
O
Muting signal output to the coil/motor driver
5 to 8
BUS0 to BUS3
O
Serial data output to the CD-MP3 processor
9
RMC
I
Remote control signal input from the remote control receiver
10
BUCK
O
Serial data transfer clock signal output to the CD-MP3 processor
11
XCCEN
O
Chip enable signal output to the CD-MP3 processor
12
XRST
O
Reset signal output to the CD-MP3 processor "L": reset
13
X2
I
Sub system clock input terminal (32.768 kHz)
14
X3
O
Sub system clock output terminal (32.768 kHz)
15
VCC
-
Power supply terminal (+3.3V)
16
VSS
-
Ground terminal
17
USB_RESET
O
Reset signal output to the USB controller "L": reset
18
MCHING
O
Music change signal output to the USB controller
19
USB_BUSY
I
Command operation busy signal input from the USB controller
20
USB_FLG
I
Flag delay signal input from the VBUS power on/off switch
21
USB_EN
O
Power supply on/off control signal output to the VBUS power on/off switch "H": power on
22
LED_STBY
O
LED drive signal output terminal for STANDBY indicator "L": LED on
23
CD_ON
O
Power supply on/off control signal output terminal for CD section "H": power on
24
USB_REG_ON
O
Power supply on/off control signal output terminal for USB section "H": power on
25
NC
-
Not used
26
RDS_DATA
I
RDS serial data input from the RDS decoder
27
DAB_1.2V
O
Power supply (+1.2V) on/off control signal output terminal for DAB tuner module
"H": power on
"H": power on
28
DAB_3.3V
O
Power supply (+3.3V) on/off control signal output terminal for DAB tuner module
"H": power on
"H": power on
29
DAB_DI
O
Serial data output to the DAB tuner module
30
AUDIO_SW
O
CD/USB audio selection signal output to the audio select switch "L": CD, "H": USB
31
DAB_DO
I
Serial data input from the DAB tuner module
32
AVCC
-
Power supply terminal (+3.3V)
33
FUNC_SDA
O
Serial data output to the electrical volume
34
AMP_ON
O
Standby control signal output to the power amplifi er "L": standby
35
AVSS
-
Ground terminal
36
P_MONI
I
Power monitor input terminal
37, 38
KEY1, KEY2
I
Front panel key input terminal (A/D input)
39
NC
-
Not used
40
TP_STATE
I
REC/PB detection signal input terminal "L": PB, "H": REC
41
KEY0
I
Power key input terminal
42
HOLD
I
Hold signal input terminal
43
SBSY
I
Subcode block sync signal input from the CD-MP3 processor
44
VSS
-
Ground terminal
45
NC
-
Not used
46
POWER_ON
O
Main power supply on/off control signal output terminal "H": power on
47
SUFIX
I
Destination setting terminal Not used
48
RE_VOL
I
Jog dial pulse input from the rotary encoder (for VOLUME)
49
USB_SDA
I/O Two-way I2C data bus with the USB controller
50
USB_SCL
O
I2C clock signal output to the USB controller
51
MD2
I
Mode setting terminal Fixed at "L" in this set
52, 53
MD1, MD0
I
Mode setting terminal Fixed at "H" in this set
54
RESET
I
Reset signal input terminal "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
55 to 57
NC
-
Not used
58
V3
-
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
59 to 62
COM0 to COM3
O
Common drive signal output to the liquid crystal display
63, 64
SEG0, SEG1
O
Segment drive signal output to the liquid crystal display
HCD-EH55DAB
35
Pin No.
Pin Name
I/O
Description
65
VCC
-
Power supply terminal (+3.3V)
66
VSS
-
Ground terminal
67 to 89
SEG2 to SEG24
O
Segment drive signal output to the liquid crystal display
90
VCC
-
Power supply terminal (+3.3V)
91
VSS
-
Ground terminal
92
X1
O
Main system clock output terminal (5.53 MHz)
93
X0
I
Main system clock input terminal (5.53 MHz)
94 to 100
SEG25 to SEG31
O
Segment drive signal output to the liquid crystal display
36
HCD-EH55DAB
SECTION 8
EXPLODED VIEWS
1
A-1552-241-A MAIN BOARD, COMPLETE
2
3-701-748-00 CLAMP
3
3-287-571-41 CABINET,
REAR
0
4
1-835-069-11 CORD, POWER
5
3-198-753-11 FOOT
(FELT)
6
1-480-340-51 MODULE
(DAB
TUNER)
7
3-087-053-01 +BVTP2.6
(3CR)
8
2-580-644-01 SCREW, +KTP2 3X8
10
1-500-868-11 CORE,
FERRITE
11
3-700-085-01 SHEET, COPPER LEAF
0
F001
1-532-275-33 FUSE (T160mAL/250V)
0
PT005
1-445-506-11 TRANSFORMER, POWER
#1
7-685-646-79 SCREW +BVTP 3X8 TYPE2 IT-3
#2
7-685-647-79 SCREW +BVTP 3X10 TYPE2 IT-3
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
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.
8-1. OVERALL SECTION
1
#2
#2
#2
#2
#1
#1
#1
#2
not supplied
not
supplied
supplied
MAIN
board
board
PT005
F001
front cabinet section
top cabinet section
3
4
8
11
8
5
5
10
2
7
6
7
not supplied
(HOLDER1 board)
(HOLDER1 board)
not supplied
not supplied
(PT-VBUS board)
(PT-VBUS board)
not supplied
"
"
%
%
#
#
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