Sony MCE-CX80K, Service Manual

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35
Pin No. Pin Name I/O Function
45 BUS I
Vertical synchronized signal input from the MPEG video/audio decoder (IC505) “L” active
46 BUS XWRL O
Not used (open)
47 LOBOOST O
Low boost control signal output terminal
48 AUDIO MUTE O
Audio muting on/off control signal output terminal “H”: muting on
49 LOAD OUT O Loading motor drive signal output
50 LOAD IN O
Loading motor drive signal output
51 INSW I
Not used (fixed at “H”)
52 OUTSW I Not used (fixed at “H”)
53 MODEL1 I
Destination setting terminal (fixed at “L”)
54 MODEL2 I
Destination setting terminal (fixed at “H”)
55 TBLL O Table motor drive signal output terminal
56 TBLR O
59 OUTSW I Loding position
Table motor drive signal output terminal
57 , 58 ENC1 , ENC2 I
Disc tray address detection signal input terminal
60, 61 NCO O Not used (open)
62 VCC —
Power supply terminal (+5V)
63 NCO O
Not used (open)
64 VSS — Ground terminal
65 VMUTE O
Video muting on/off control signal output terminal “L”: muting on
66 to 71 A6 to A1 O
Address signal output for the external device Not used (open)
72 UTOI O Not used (open)
73 TEST LED O
LED drive signal output for the self diagnosis indicator (D502) Normally: “L” (LED on)
74 TEST1 I
Setting terminal for the test mode 1 (for VCD check)
Normally: fixed at “H” (“L”: test mode)
75 TEST2 I
Setting terminal for the test mode 2 (for SERVO check)
Normally: fixed at “H” (“L”: test mode)
76 TEST3 I
Setting terminal for the test mode 3 Normally: fixed at “H” (“L”: test mode)
Not used (fixed at “H”)
77 DEVICE RESET O
System reset signal output to the CXD2545Q (IC101), BA6392FP (IC102) and D/A converter
(IC509) “L”: reset
78 STANDBY O
Standby LED drive signal output terminal “L”: power on (LED off), “H”: standby (LED on)
79 FL CS O
Chip select signal output to the fluorescent indicator tube driver (IC801) “L” active
80 FL BLK O Blank control signal output to the fluorescent indicator tube driver (IC801) “L” active
81 to 88 D7 to D0 I/O
Two-way data bus with the external device Not used (open)
89 MIC CTRL
Not used
90 KEY1 I
Key input terminal (A/D input) S809 to S814 (
1
/
u
, DISC1, DISC2, DISC3, DISC4, DISC5,
keys input)
91 KEY2 I
Key input terminal (A/D input) S802 to S808 JOG (PUSH ENTER), DISC SKIP,
EX-CHANGE, KEY CONTROL (
2
, NATURAL, #), RETURN, KARAOKE PON,
SOUND EFFECT, PICTURE EFFECT
92 KEY3 I Key input terminal S831 to S836 (OPEN/CLOSE,
=
,
+
,
(
,
P
,
p
keys input)
93 NT/PAL I
Video system select switch (S501) input terminal
“L”: PAL, “H”: NTSC, Center voltage: AUTO
94 MUSIC VOL I
Music level select volume (RV704) input terminal.
I/O