Sony MDS-EX77, Service Manual

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Pin No. Pin Name I / O Function
39 LD LOW
O Loading motor voltage control signal output to the loading motor driver (IC311)
40
NC — Not used (open)
41 MNT2 I
Monitor 2 signal input from the CXD2650R (IC121)
42 MNT3 I
Monitor 3 signal input from the CXD2650R (IC121)
43 LED0 O
LED drive signal output terminal Not used (open)
44
NC — Not used (open)
45
NC — Not used (open)
46 BUS-OUT
O Audio bus signal output terminal
47 GND
— Ground terminal
48 +3.3V
— Power supply terminal (+3.3V)
49 NC — Not used (open)
50 JOG1 I
JOG dial pulse input of the rotary encoder (S741)
51 JOG0
I JOG dial pulse input of the rotary encoder (S741)
52 SDA I/O
Two-way data bus for the EEPROM (IC171)
53 SCL O
Clock signal output to the EEPROM (IC171)
54
FS32
O
LED drive signal output terminal of the 32 kHz indication LED (D734) “L”: LED on
55
FS44
O
LED drive signal output terminal of the 44.1 kHz indication LED (D735) “L”: LED on
56
FS48
O
LED drive signal output terminal of the 48 kHz indication LED (D736) “L”: LED on
57
NC — Not used (open)
58
NC — Not used (open)
59
AUBK I Check signal input of the audio bus connection
60 SA/SW
O Selection signal output terminal of the audio bus and remote controller Not used (open)
61
AIN O LED drive signal output terminal of the ANALOG IN indication LED (D733) “L”: LED on
62
NC — Not used (open)
63 CLKSET0 I
Clock destination selected terminal (fixed at “H” in this set)
64 CLKSET1 I
Clock destination selected terminal (fixed at “L” in this set)
65 GND
— Ground terminal
66 +3.3V
— Power supply terminal (+3.3V)
67 SCLK O
Serial clock signal output to the CXD2650R (IC121) and A/D, D/A converter (IC201)
68 SWDT O
Writing data output to the CXD2650R (IC121) and A/D, D/A converter (IC201)
69 SRDT I
Reading data input from the CXD2650R (IC121)
70 NC
— Not used (open)
71 FLCLK O
Serial data transfer clock signal output to the fluorescent indicator tube driver (IC701)
72 FLDATA O
Serial data output to the fluorescent indicator tube driver (IC701)
73 FLCS O Chip select signal output to the fluorescent indicator tube driver (IC701)
74 NC
— Not used (open)
75 LDON O
Laser diode on/off control signal output to the automatic power control circuit “H”: laser on
76 PIT/GRV O
Pit/groove detection signal output terminal
“H” is output for the playback only disc or TOC area Not used (open)
77
FOK
I
Focus OK signal input from the CXD2650R (IC121) “H” is input when focus is on
78 NC
— Not used (open)
79 LOCK O
Lock signal output terminal Not used (open)
80 WRPWR
O
Laser power select signal output to the CXD2650R (IC121)
“H”: recording mode, “L”: playback mode
81 DIG-RST O
Reset signal output to the CXD2650R (IC121) and BH6511FS (IC152) “L”: reset