![background image](http://html.mh-extra.com/html/sony/hcd-vx550/hcd-vx550_service-manual_420909051.webp)
51
Pin No.
Pin Name
I/O
Description
76
CAP-M-H/L
O
High/normal speed selection signal output of the capstan motor (M1)
“L”: normal speed, “H”: high speed
77
AMS-IN
I
Whether a music is present or not from HA12215F (IC301) is detected at automatic music sensor
“L”: music is present, “H”: music is not present
78
TC-MUTE
O
Line muting on/off selection signal output to the HA12215F (IC301)
“L”: muting off, “H”: muting on
79
R/P-PASS
O
Recording/playback/pass selection signal output to the HA12215F (IC301)
“L”: recording mode, “H”: pass, “Hi-z”: playback mode
80
NR-ON/OFF
O
Dolby NR on/off selection signal output to the HA12215F (IC301)
“L”: dolby off, “H”: dolby on
81
REC-MUTE
O
Recording muting on/off selection signal output to the HA12215F (IC301)
“L”: muting on, “H”: muting off
82
BIAS
O
Recording bias on/off selection signal output to the HA12215F (IC301)
“L”: bias off, “H”: bias on
83
EQ-H/N
O
Normal/high speed selection signal output to the HA12215F (IC301)
“L”: normal speed, “H”: high speed
84
PB-A/B
O
Deck-A/B selection signal output to the HA12215F (IC301) “L”: deck-A, “H”: deck-B
85
ALC-ON/OFF
O
Automatic limiter control signal output to the HA12215F (IC301) “L”: limiter on
86
B-PLAY-SW
I
Detection input from the deck- B play detect switch (S1002) “H”: deck-B play
87
A-PLAY-SW
I
Detection input from the deck- A play detect switch (S1001) “H”: deck-A play
88
A-HALF
I
Detection input from the deck-A cassette detect switch (S1003)
“L”: cassette in, “H”: no cassette
89
B-HALF
I
Detection input from the deck-B half detect switch (S1006)
90
B-SHUT
I
Shut off detection signal input from the deck-B side reel pulse detector (IC1002)
91
A-SHUT
I
Shut off detection signal input from the deck-A side reel pulse detector (IC1001)
92
SOFT-TEST
O
Output terminal for the software test (open)
93
KEY/CD-ADJ
I
Setting terminal for the CD adjustment mode
94
KEY/CD-ADJ
I
Setting terminal for the CD adjustment mode
95
MODEL-IN
I
Destination setting terminal
96
AVSS
—
Ground terminal (for A/D conversion)
97
SPEC-IN
I
Setting terminal for the version
I
Reference voltage (+5V) input terminal (for A/D conversion)
—
Power supply terminal (+5V) (for A/D conversion)
O
Recording/playback select signal output to the REC/PB switch (IC602)
“L”: playback, “H”: recording
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299