Sony MZ-R37, Service Manual

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Pin No. Pin name I/O Pin Description
50 AV
SS
— Ground terminal for A/D converter.
51 AVREF I A/D converter reference voltage input.
52 AV
DD
— A/D converter power supply terminal.
53 VLG2-MNT I DSP power monitor signal.
54 TEMP I Temp meter (IC802) input.
55 KEY3 I Key input.
56 KEY2 I Key input.
57 KEY1 I Key input.
58 XINT REC SW I Recording head position detect input.
59 UNREG MNT I 2.8 V voltage monitor input.
60 BAT VC I Battery detect signal input.
61 FG IN I FG input from motor driver (IC503).
62 NC — Not used (Open).
63 FOK PORT I Focus OK signal input.
64 –––– — Not used (Open).
65 LCD RESET O LCD reset signal output.
66 XJACKDET I LINE IN (OPTICAL) jack detection input.
67 OPT DET I LINE IN (OPTICAL) optical detection input.
68 XMIC DET I MIC (PLUG IN) jack detection.
69 (NC) — Not used (Open).
70 FSI (NC) — Not used (Open).
71 SPOFF O
72 RSI O
REC head motor control signal output.
73 RH PWM O RH constant current control signal output.
74 (NC) — Not used (Open).
75 DQSY I Subcode Q sync (SCOR) of digital in U-bit CD format from IC601.
76 T COUNT I Traverse count signal input.
77 SDI1 I Serial data input.
78 SDO1 O Serial data output.
79 SCK1 O Serial clock output.
80 SQSY I SUB-Q/ADIP SYNC input.
81 BEEP O BEEP sound output control.
82 XLAT O Latch output.
83 NC — Not used (Open).
84 TEX — Not used (Fixed at “L”).
85 TX — Not used (Fixed at “L”).
86 V
SS
— Ground.
87 V
DD
— Power supply pin (+2.8V).
88 NC — Not used (Fixed at “H”).
89 XCS ADA O A/D, D/A converter chip select output.
90 XPD ADA O A/D, D/A converter power down signal output. H : Power down
91 KEY ON O SLEEP : L, action : H.
92 XNIMH DET (NC) — Not used (Open). (Battery detect switch input.)
93 A MUTE O Analog mute control. H : Mute
94 XOPT CTL O Power supply control output for an optical input.
95 FFCLR O Flip flop clear signal output.
96 XCE NV O EEPROM chip select output.
97 SENS I SENS input.
98 LDON O “H” : APC circuit ON, “L” : APC circuit OFF
99 XSHOCK I Track jump detection input from IC601.
100 CLV STB O CLV drive control signal output.