Sony HCD-GX255 / HCD-RG170 / HCD-RG470 / MHC-GX255 / MHC-RG170 / MHC-RG470 Service Manual ▷ View online
69
HCD-GX255/RG170/RG470
– MAIN Board –
IC101
BD3401KS2
1
D1
2
D2
3
E1
9
TAPE
A1
10
TAPE
A2
11
TAPE
B1
12
TAPE
B2
13
RECNF2
14
RECOUT2
5
PBNF2
6
PBOUT2
7
PBOUT1
4
E2
8
PBNF1
15
RECOUT1
16
RECNF1
33 VOLOUT1
34 BBNF1
35 BBIN1
36 VIN1
DIGITAL
CONTROL
64
C2
+
−
+
−
+
−
+
−
ALC
ATT
ATT
ALC
DI-LIMITER
SURROUND
17
ALC
18
SC
19
SI
27
LF3
28
LF2
29
LF1
30
BBIN2
20
VDD
21
GND
22
VCC
23
1/2 VCC
24
FILTER
+
−
32
VOLOUT2
+
−
25
SWOUT
26
LF4
+
−
LOW-PASS
FILTER
SOFT
SWITCH
BUFFER
MIX
MIC AMP
+
−
31
BBNF2
38 VIN2
37
TONE
OUT1
OUT1
48 MNF2
+
−
+
−
+
−
+
−
+
−
+
−
+
−
+
−
63
C1
62
B2
61
B1
60
A2
59
A1
45 MNF1
44 BNF1
42 BOUT2
41 BNF2
39
TONE
OUT2
OUT2
40 AMS OUT
47 MOUT2
46 MOUT1
43 BOUT1
+
−
58
MIC
56
SAOUT1
55
SAOUT2
57
CAP
+
−
INPUT
SELECT
+
−
+
−
54
LINEOUT1
53
LINEOUT2
52
SUR2
51
SUR1
49
TNF2
50
TNF1
TONE
CONTROL
TONE
CONTROL
+
+
+
+
70
HCD-GX255/RG170/RG470
– MIC Board –
IC802
M65850FP-E1
OSCILLATOR
1/2 VCC
AUTO
RESET
LPF1
MAIN
CONTROL
A/D
20KBIT
SRAM
LPF2
D/A
2
3
4
5
6
7
8
9
10
11
15
14
13
12
CLOCK
RESET
MO
MI
D1
DO0
DO1
VCC
16
NC
CLOCK
REF
OP2IN
OP2OUT
LPF2IN
LPF2OUT
LPF1IN
1
NC
LPF1OUT
OP1OUT
OP1IN
CC1
CC2
GND
71
HCD-GX255/RG170/RG470
•
IC Pin Function Description
MAIN BOARD IC901 M30302MCP-A02FPU0 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
O-BD3401-
DATA
O
Serial data output to the electrical volume
2
O-BD3401-CLK
O
Serial data transfer clock signal output to the electrical volume
3
O-VFD-RESET
O
System reset signal output to the FL/LED driver
4
O-VFD-CE
O
Chip enable signal output to the FL/LED driver
5
I-AC-CUT
I
AC power detection signal input terminal
6
I-VOL-A
I
Jog dial pulse input terminal
7
I-SIRCS-IN
I
SIRCS signal input terminal
8
BYTE
I
Mode setting terminal Normally not used
9
CNVSS
I
Mode setting terminal Normally not used
10
XCIN
(32.768KHZ)
I
Sub system clock input terminal (32.768 kHz)
11
XCOUT
(32.768KHZ)
O
Sub system clock output terminal (32.768 kHz)
12
I-RESET
I
System reset signal input from the reset signal generator "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"
13
XOUT (16MHZ)
O
Main system clock output terminal (16 MHz)
14
VSS
-
Ground terminal
15
XIN (16MHZ)
I
Main system clock input terminal (16 MHz)
16
VCC1
-
Power supply terminal (+3.3V)
17
NMI
I
Non-maskable interrupt signal input terminal
18
I-RDS-CLK
I
RDS data transfer clock signal input terminal (AEP, East European models)
19
I-SCOR
I
Subcode Q sync (SCOR) input from the CD DSP
20
I-AC-PULSE
I
AC main power detection signal input terminal
21
I-VOL-B
I
Jog dial pulse input terminal
22
O-STBY-LED
O
LED drive signal output terminal
23
O-SYS-MUTE
O
Muting on/off control signal output terminal
24
O-STK-MUTE
O
Standby signal output to the power amplifier (for front speaker output)
25
O-SWR
O
Relay drive signal output for surround output Not used
26
O-POWER-
RELAY
O
Relay drive signal output for main power
27
O-FRONT-SP-
RELAY
O
Power on/off control signal output for the fan motor and amplifier section
28
O-MP3-CLK
O
Serial data transfer clock signal output to the MP3 decoder
29
I-MP3-DI
I
Serial data input from the MP3 decoder
30
O-MP3-DATA
O
Serial data output to the MP3 decoder
31
O-CD-DATA
O
Serial data output to the CD DSP
32
I-CD-SENS
I
Internal status (SENSE) input from the CD DSP
33
O-CD-CLK
O
Serial data transfer clock signal output to the CD DSP
34
O-XTCN
O
Oscillator control signal output to the CD DSP
35
O-VFD-DATA
O
Serial data output to the FL/LED driver
36
I-VFD-DATA
I
Serial data input from the FL/LED driver
37
O-VFD-CLK
O
Serial data transfer clock signal output to the FL/LED driver
38
O-MP3-RESET
O
System reset signal output to the MP3 decoder
39
O-MP3-CS
O
Chip select signal output to the MP3 decoder
40
I-MP3-ACK
I
Acknowledge signal input from the MP3 decoder
41
xHOLD
I/O
Not used
72
HCD-GX255/RG170/RG470
Pin No.
Pin Name
I/O
Description
42
O-MP3-STB
O
Standby signal output to the MP3 decoder
43
I-MP3-REQ
I
Data send request signal input from the MP3 decoder
44
O-MP3-LP
O
Latch pulse signal output to the MP3 decoder
45
O-XLT
O
Latch pulse signal output to the CD DSP
46
xWR
I/O
Not used
47
O-XRST
O
System reset signal output to the CD DSP and motor/coil driver
48, 49
O-LM-R,
O-LM-F
O
Loading motor control signal output terminal
50, 51
O-TM-R,
O-TM-F
O
Table motor control signal output terminal
52 to 54
I-E-1 to I-E-3
I
Disc tray address sensor (rotary encoder) input terminal
55
I-CD NUMBER
SENS
I
Table address sensor input terminal
56
I-OPEN-SW
I
Disc tray open/close detection switch input terminal
57
O-CDG-MUTE-
DATA
O
Muting control signal output to the CD graphics decoder (Mexican model)
58
O-CDG-RST
O
System reset signal output to the CD graphics decoder (Mexican model)
59
O-CDG-BGC
O
NTSC/PAL switching control signal output terminal (Mexican model)
60
I-CDG-DET
I
CD-G detection signal input terminal (Mexican model)
61
O-CDG-POWER
O
Power on/off control signal output for CD-G section (Mexican model)
62
VCC2
-
Power supply terminal (+3.3V)
63
O-VMUTE
O
Video muting on/off control signal output terminal (Mexican model)
64
VSS
-
Ground terminal
65
O-LC72121-CLK
O
Serial data transfer clock signal output to the FM/AM tuner pack
66
I-LC72121-DI
I
Serial data input from the FM/AM tuner pack
67
O-LC72121-DO
O
Serial data output to the FM/AM tuner pack
68
O-LC72121-CE
O
Chip enable signal output to the FM/AM tuner pack
69
I-TUNED
I
Tuning detection signal input from the FM/AM tuner pack
70
I-STEREO
I
FM stereo detection signal input from the FM/AM tuner pack
71
O-ST-MUTE
O
Muting on/off control signal output to the FM/AM tuner pack
72
I-RDS-DATA
I
RDS data input from the terminal (AEP, East European models)
73
I-MODEL1
I
Setting terminal for the destination and model type
74
I-KEY0
I
Front panel key input terminal (A/D input)
75 to 80
I-MODEL2 to
I-MODEL7
I
Setting terminal for the destination and model type
81
I-HP/AUDIO IN
I
Headphone plug and audio in plug insert detection signal input
82
I-MIC
I
MIC plug insert detection signal input terminal (120 V AC area in E, Chilean, Peruvian, Argentina,
Mexican models)
Mexican models)
83
I-REAL-A
I
Deck-A tape reel rotating detection signal input terminal
84
I-REAL-B
I
Deck-B tape reel rotating detection signal input terminal
85
O-MOTOR
O
Capstan/reel motor drive signal output terminal
86
O-A-SOL
O
Deck-A plunger drive signal output terminal
87
O-B-SOL
O
Deck-B plunger drive signal output terminal
88
I-TAPE-A-STAT
I
Deck-A cassette detection signal, deck-A mode detection signal and recording (reverse direction)
detection signal input terminal (A/D input)
detection signal input terminal (A/D input)
89
I-TAPE-B-STAT
I
Deck-B cassette detection signal, deck-B mode detection signal and recording (forward direction)
detection signal input terminal (A/D input)
detection signal input terminal (A/D input)
90
O-REC/PB
O
REC/PB switching control signal output terminal
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