Read Sony CFD-S28 Service Manual online
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Pin No.
Pin Name
I/O
Description
69
TAPE
O
Tape function control signal output to the TA2068N (IC301)
“L”: radio or CD on, “H”: tape on
“L”: radio or CD on, “H”: tape on
70
RADIO
O
Power on/off control signal output for the radio +6V power supply “H”: radio power on
71
CD
O
Power on/off control signal output for the CD +5V power supply “L”: CD power on
72
VDD
—
Power supply terminal (+5V)
73
TX
O
Sub system clock output terminal (32.768 kHz)
74
TEX
I
Sub system clock input terminal (32.768 kHz)
75
NC
O
Not used (open)
76
ISS1
O
ISS 1 on/off control signal output terminal “H”: ISS 1 on Not used (open)
77
ISS2
O
ISS 2 on/off control signal output terminal “H”: ISS 2 on Not used (open)
78
C-DOOR
I
CD lid open/close detection switch (S501) input terminal “L”: CD lid is closed
79
TC-PLAY
I
Tape play detection switch (S303) input terminal “L”: tape play mode
80
REG CHK
I
Regulator check signal input of the AC input or battery input “H” active
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