Read Sony MDX-C670 / MDX-C670RDS (serv.man2) Service Manual online
Pin No.
Pin Name
I/O
Function
39
TEMP
I
A/D input for temperature detection
40
ACNT
I
A/D input to select the number of Load/Eject aging times
0H - 54H (30 times), 55H - OA9H (20 times), OAAH - OFFH (10 times)
0H - 54H (30 times), 55H - OA9H (20 times), OAAH - OFFH (10 times)
41
DO SEL
I
A/D input to select digital output bits
42
EE CS
O
Output of EEPROM selection (Not used in this set) (open)
43
EE CKO
O
Serial clock output for EEPROM (Not used in this set) (open)
44
EE SIO
I/O
EEPROM data input/output (Not used in this set) (open)
45
MD SO
O
Data output to MD servo IC (SWDT of CXD2650R in this set)
46
LINKOFF
O
“LINKOFF” pin of SONY Bus
“H”: LINKOFF
“L”: LINK connected
47
UNIREQ
O
“REQUEST” pin of SONY Bus
“H”: REQUEST ON (Not used in this set) (open)
48
UNICKI
I
“CLOCK IN” pin of SONY Bus
49
UNISI
I
“DATA IN” pin of SONY Bus
50
UNISO
O
“DATA OUT” pin of SONY Bus
51
MD CKO
O
“CLOCK OUT” pin to MD servo IC (CXD2650R in this set)
52
MD SI
I
“DATA IN” pin from MD servo IC (SRDT of CXD2650R in this set)
53
NCO
O
Not used (open)
54
SENS
I
“SENSE” input from MD servo IC (CXD2650R in this set)
55
CC XINT
I
Input of “XINT” interrupt signal from MD servo IC (CXD2650R in this set)
56
LIMIT IN
I
Input of sled most inside track detection switch
57
EJT KEY
I
Input of EJECT key
“L”: EJECT button ON
58
ERROR PWM
O
Output of C1 ATER (Not used in this set) (open)
59
MD RST
O
Output of RESET to MD servo IC (XRST of CXD2650R in this set)
/RF AMP IC (XRST of CXA2523R in this set)
/RF AMP IC (XRST of CXA2523R in this set)
60
BU IN
I
System power interruption check port
61
BUS ON
I
“BUS ON” input pin of SONY Bus
62
SQSY
I
Input of “SUBQ Sync” from MD servo IC (CXD2650R in this set)
63
C SW
I
Input of cartridge loading switch (S901)
“H”: Cartridge eject completed
“H”: Cartridge eject completed
“L”: Cartridge loading
64
MD LAT
O
Output of LATCH command to MD servo IC (XLAT of CXD2650R in this set)
65
MD ON
O
Power supply control to MD servo IC (CXD2650R in this set)
“H”: Power on
66
DEEMP
O
Deemphasis control
“H”: Deemphasis circuit ON
67
A MUTE
O
Output of audio mute
“H”: Mute ON
68
NCO
O
Not used (open)
69
TSTCKO
O
Output of clock for TEST mode display (Not used in this set) (open)
70
TSTSO
O
Output of data for TEST mode display (Not used in this set) (open)
71
TSTMOD
I
Input of TEST mode
“H”: Normal
“L”: TEST mode
72
VDD
–
Power supply
73
NC
–
NC pin (Connected to VDD)
74
TOUT0
O
75
TOUT1
O
Output of 4
×
8 matrix test keys (Not used in this set) (open)
76
TOUT2
O
77
TOUT3
O
78
TIN0
I/O
Input of 4
×
8 matrix test keys
79
TIN1
I/O
(“L” is always output, except in TEST mode) (Not used in this set) (open)
80
TIN2
I/O
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