Circuit Boards Location - Sony CDX-M620 Service Manual

Pin No. Pin Name I/O
83 STBY I Hardware standby signal
84 VCC — Power supply pin (+5 V)
85 XTAL — Crystal oscillator (18.432 MHz)
86 EXTAL — Crystal oscillator (18.432 MHz)
87 VSS — Ground
88 PF7 O Not used. (Open)
89 VCC — Power supply pin (+5 V)
90 – 96 PF6 – PF0 O Not used. (Open)
97 UNI SO O SONY BUS serial data output
98 UNI SI I SONY BUS serial data input
99, 100 VSS — Ground
101 UNI CKI I SONY BUS serial clock input
102 P53 O Not used. (Open)
103 AVCC — Power supply pin (+5 V)
104 VREF — Power supply pin (+5 V)
105 – 112 P40 – P47 I Connecting to ground in this set.
113 AVSS — Ground
114 VSS — Ground
115 – 122 P17 – P10 O Not used. (Open)
123 MD0 I Mode setting 0
124 MD1 I Mode setting 1
125 MD2 I Mode setting 2
126 – 128 PG0 – PG2 O Not used. (Open)
Pin Description
33

4-2. CIRCUIT BOARDS LOCATION

DISC IN SW board
SWITCH board
DISPLAY board
KEY board
33
CDX-M620/M670
LIMIT SW board
SERVO board
tuner unit
(TUX201)
MAIN board
SUB (CD) board