Sony MDX-C800REC, Service Manual

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Pin No. Pin Name I/O Pin Description
56 TSTSO O Data output for test mode display (Normally, open)
57 TSTCKO O Clock output for test mode display (Normally, open)
58 – 62 NC — Not used (Open)
63 VSS — Ground pin
64 NC — Not used (Open)
65 DACRST O Reset output to DAC IC
66 DACCES O Chip enable output to DAC (SUB)
67 DAC SO O DAC control serial data output
68 DAC CKO O DAC control serial clock output
69 DAC CEF O Chip enable output to DAC (FRONT)
70 DAC CER O Chip enable output to DAC (REAR)
71, 72 NC — Not used (Open)
73 XIA — Input for sub clock oscillation (Fixed at “H” in this set)
74 XOA — Input for sub clock oscillation (Connect to ground pin in this set)
75 CC-XINT I XINT interruption input from MD servo IC
76 BUS-ON I BUS ON input of SONY BUS
77 BU-IN I Power instantaneously cut off check port of system
78 SQ-SY I SUBQ SYNC interruption input from MD servo IC
79 DISC-IN I DISC-IN (cartridge in switch) sensor input of MD mechanism deck
80 A-ATT O Audio attenuator output (“H”: ATT ON)
81 DQ-SY I Subcord Q sync of DIGITAL IN U-bit CD format from MD servo IC
82 NC — Not used (Open)
83 EJECT IN I EJECT (MD) switch input
84 SORCE I Select signal input of signal input (analog/digital input) (Not used in this set)
85 LOCK O Output of CLV lock condition when test mode (Normally, open)
86 HSTX — Hardware standby input (Connect to SYSRST in this set)
87 MD2 — CPU operation mode designation input (Connect to ground pin in this set)
88, 89 MD1, 0 — CPU operation mode designation input (Fixed at “H” in this set)
90 RSTX — Reset input (Fixed at “H” in this set)
91 VSS — Ground pin
92 X0 I Main clock oscillation input (3.68 MHz)
93 X1 O Main clock oscillation output (3.68 MHz)
94 VCC — Power supply pin (+5 V)
95, 96 NC — Not used (Open)
97 RAMBU I RAM backup detection input
98, 99 NC — Not used (Open)
100 MD/REC-ON O Power control output for overlight head
101 RF-ON O Power control output for RF AMP
102 REC-P I Detection signal input from REC position detection switch (“L”: REC position)
103 PLAY-P I Detection signal input from PLAY position detection switch (“L”: PLAY position)
104 PROTECT I
Recording prevention claw detection input from write protect detection switch
(“H”: Write Protect)
105 REFLECT I
Desk reflectance detection input from reflect detection switch
(“H”: Low reflectance disk IN)
106 PACK-IN I PACK-IN (LOADING END SENSOR) sensor input of MD mechanism deck
107 NC — Not used (Open)
108 REC/PLAY I
Change select input on recording mechanism deck and playing mechanism deck
(“H”: REC, “L”: PLAY) (Fixed at “H” in this set)
109 DFCTSEL I Select input on used of DEFECT2 function (Not used in this set (Fixed at “H”))
110 WRPWR O
Laser power select signal output to optical pick-up or CXD2652AR
(“L”: READ POWER, “H”: WRITE POWER)
111 PREHEAT O Preheat control output (“H”: Preheat ON)
112 MDRST O Reset output to MD servo IC