Sony MCE-SV7, Service Manual

Page: 40 / 54

40
MCE-SV7
Pin No. Pin Name I/O Description
50 T-SENS3 I
Detection input from the disc tray 3 height sensor (IC733)
“H”: disc tray 3 position is chucking position
51
— — Not used (fixed at “H”)
52 DISC-SENS I Detection input from the disc in detect sensor (IC751)
53 B-TRIG O
Deck-B trigger plunger drive signal output to the tape deck unit (TC-S3)
“H”: trigger plunger on
54
ECO CHECK — Not used (fixed at “H”)
55 A-TRIG O
Deck-A trigger plunger drive signal output to the tape deck unit (TC-S3)
“H”: trigger plunger on
56 to 58
— — Not used (open)
59
R/PB/PASS
O
Recording/playback/pass selection signal output to the tape deck unit (TC-S3)
“L”: recording, center voltage: playback, “H”: pass
60, 61
— — Not used (open)
62 VCC —
Power supply terminal (+5V)
63
SOFT-TEST
O
For software check terminal (open)
64 VSS — Ground terminal
65 to 68
LED_DISC1 O LED drive signal output of the
1
indicator (D705) “L”: LED on
69 to 72
LED_DISC2 O LED drive signal output of the
2
indicator (D704) “L”: LED on
73 to 76 LED_DISC3 O LED drive signal output of the
3
indicator (D703) “L”: LED on
77 to 80
LED_PLAY O LED drive signal output of the N indicator (D702) “L”: LED on
81 to 83
LED_PAUSE O
LED drive signal output of the
X
indicator (D701) “L”: LED on
84 EXP-IN DATA I Serial data input from the tape deck unit (TC-S3)
85 EXP-OUT DATA
O Serial data output to the tape deck unit (TC-S3)
86
EXP-LAT O Serial data latch pulse signal output to the tape deck unit (TC-S3)
87 EXP-CLK O Serial data transfer clock signal output to the tape deck unit (TC-S3)
88
LED_PAUSE O LED drive signal output of the X indicator (D701) “L”: LED on
89 A-SHUT I
Shut off (desk-A) detection signal input from the tape deck unit (TC-S3)
90 B-SHUT I Shut off (desk-B) detection signal input from the tape deck unit (TC-S3)
91 B-HALF I
Detection input from the deck-B cassette detect switch of the tape deck unit (TC-S3)
“L”: cassette in
92
MODEL-IN I Model destination setting terminal
93 KEY3 — Not used (open)
94
KEY2 (TC) I Key input from the tape deck unit (TC-S3) (A/D input)
95
KEY1 (CD) I
Key input terminal (A/D input) (S711 to S720)
m
,
M
,
.
,
>
,
x
,
X
,
N
, RETURN,
PREV, NEXT keys input
96 AVSS — Ground terminal (for A/D conversion)
97 KEY1 (CD) I
Key input terminal (A/D input) (S701 to S708) DISC 3, DISC 2, DISC 1,
Z
(DISC1),
Z
(DISC2), Z (DISC3), REPEAT, PLAY MODE keys input
98
VREF
I
Reference voltage (+5V) input terminal (for A/D converter)
99 AVCC — Power supply terminal (+5V) (for A/D conversion)
100
— — Not used (open)