Read Sony HCD-W550 / MHC-W550 / MHC-W770AV Service Manual online
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Pin No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
I/O
O
O
O
—
I/O
I/O
O
O
O
O
O
—
O
I
O
O
O
O
O
O
—
O
O
I
I
I
—
I
I
I
I
O
O
O
O
O
O
O
O
O
O
I/O
O
I
I
O
I
—
—
—
Description
LED control.
LED control.
LED control.
Not used.
Communciation data.
Comunicaton clock.
CD reset.
CD latch.
Focus switch.
Table-L.
Table-R.
Not used.
Load out.
Load in.
LED control.
LED control.
LED control.
LED control.
LED control.
LED control.
Ground.
LED control.
LED control.
BD status input.
Disc sensor.
Table sensor.
Not used.
Encoder input for CDM38.
Encoder input for CDM38.
Encoder input for CDM38.
Encoder input for CDM38.
Capstan motor H/N selection.
Mechanism timing output control.
Mechanism timing output control.
Mechanism timing output control.
Capstan motor ON/OFF switch.
Playback A/B selection.
Equalizer H/L selection.
Bias ON/OFF.
REC mute.
NR ON/OFF.
REC/PB/PASS select.
TC mute.
Mechanism PLAY switch.
Mechanism PLAY switch.
Head selection.
Cassette half detection.
Not used.
Not used.
Not used.
Pin Name
LED 17
LED 16
LED 15
IIC-TEMP
IIC DATA
IIC CLK
XRST
XLAT
FOCUS SW
TBL L
TBL R
TRAY LED
LOAD OUT
LOAD IN
LED 14
LED 13
LED 12
LED 11
LED 10
LED 9
Vss
LED 8
LED 7
SENS
DISC SENS
T-SENS
UPSW
ENC3
ENC2
ENC1
OUT OPEN
CAP M H/N
A TRG
B TRG
TRG LOW
CAP M ON/OFF
PB A/B
EQ H/N
BIAS
REC MUTE
NR ON/OFF
R/P PASS
LM-ON/OFF
A PLAY SW
B PLAY SW
TC RELAY
A HALF
POWER
NC
NC
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