Sony HCD-VX5A, Service Manual

Page: 56 / 86

– 84 –
Pin No. Pin Name I/O Description
42, 43 BUS O
Not used (open)
44 SHIMUKE I Destination setting terminal “L”: Chinese, “H”: English (fixed at “H” in this set)
45 BUS I
Vertical synchronized signal input from the MPEG video/audio decoder (IC505) “L” active
46 BUS XWRL O
Not used (open)
47 LO.BOOST O Low boost control signal output terminal Not used (open)
48 AUDIO MUTE O
Audio muting on/off control signal output terminal “L”: muting on Not used (open)
49 LOAD OUT O
Loading motor drive signal output terminal Not used (open)
50 LOAD IN O
Loading motor drive signal output terminal Not used (open)
51 INSW I
Disc detection (load in) switch input terminal Not used (fixed at “H”)
52 OUTSW I
Disc detection (load out) switch input terminal Not used (fixed at “H”)
53 MODEL1 I
Destination setting terminal (fixed at “L”)
54 MODEL2 I
Destination setting terminal (fixed at “L”)
55 TBLL O
Table motor drive signal output terminal Not used (open)
56 TBLR O
Table motor drive signal output terminal Not used (open)
57 to 59 ENC1 to ENC3 I Disc tray address detection signal input terminal Not used
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 CXD3008Q (IC101), BA5974FP (IC102) and D/A converter
(IC509) “L”: reset
78 STANDBY O
Standby on/off control signal output terminal Not used (open)
79 FL CS O Chip select signal output terminal Not used (open)
80 FLBLK O
Blank control signal output terminal Not used (open)
81 to 88 D7 to D0 I/O
Two-way data bus with the external device Not used (open)
89 MIC CTRL O Mic control signal output terminal Not used
90 to 92 KEY1 to KEY3 I
Key input terminal Not used (fixed at “H”)
93 NT/PAL I
Video system select switch (S501) input terminal
“L”: PAL, “H”: NTSC, Center voltage: AUTO
94 MUSIC VOL I Volume input terminal Not used (fixed at “H”)
95 KEY4 I
Key input terminal Not used (fixed at “H”)
96 AVSS —
Ground terminal (for A/D conversion)
97 MODE. SW I Mode switch input terminal Not used
98 VREF I
Reference voltage (+5V) input terminal (for A/D conversion)
99 AVCC —
Power supply terminal (+5V) (for A/D conversion)
100 AMP. ON O
Power amplifier on/off selection signal output terminal Not used (open)
www.freeservicemanuals.info 1/11/16
Published in Heiloo, Holland.