Read Sony CMT-EP50LIV / HCD-EP50LIV Service Manual online
32
HCD-EP50LIV
Pin No.
Pin Name
I/O
Description
44
STROBE
O
Strobe signal output to the 94HC4094 (U15) “H” active
45
INPINENA
O
Mega bass on/off selection signal output “H”: mega bass on
46
DOLBYENA
O
Dolby NR on/off selection signal output terminal “L”: dolby off, “H”: dolby on
Not used (open)
Not used (open)
47
CE
O
Chip enable signal output to the LC75392 (U6) “H” active
48
PLLENA
O
PLL chip enable signal output to the FM/AM PLL (U2) “H” active
49
MUTE
O
Audio line muting on/off control signal output “H”: muting on
50
POWER
O
System power on/off control signal output “H”: power on
51 to 54
COM0 to COM3
O
Common drive signal output to the liquid crystal display (CN301)
55
BIAS
O
Bias output for the liquid crystal display drive
56 to 58
VLC0 to VLC2
I
Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive
voltage
voltage
59
VSS
—
Ground terminal
60 to 89
SEG0 to SEG29
O
Segment drive signal output to the liquid crystal display (CN301)
90
SEG30 (SEL6)
I/O
Segment drive signal output to the liquid crystal display (CN301)
AM frequency select switch (SW1) input terminal
AM frequency select switch (SW1) input terminal
91
SEG31 (SEL7)
I/O
Segment drive signal output to the liquid crystal display (CN301)
AM frequency select switch (SW1) input terminal
AM frequency select switch (SW1) input terminal
92
SEG32
O
Segment drive signal output to the liquid crystal display (CN301)
93
SEG33
O
Segment drive signal output to the liquid crystal display Not used (open)
94
SEL10
I
Head position detect switch input terminal “L”: reverse direction, “H”: forward direction
95
SEG35
O
Segment drive signal output to the liquid crystal display Not used (open)
96
SEL12
I
Cassette tape detect switch input terminal “L”: no cassette, “H”: cassette in
97
SEG37
O
Segment drive signal output to the liquid crystal display Not used
98
SEL14
I
Rec-proof claw (forward direction) detection signal input from the protect detect switch
“L”: recording possible, “H”: protect
“L”: recording possible, “H”: protect
99
SEL15
I
Rec-proof claw (reverse direction) detection signal input from the protect detect switch
“L”: recording possible, “H”: protect
“L”: recording possible, “H”: protect
100
GENERALDIN
I
Serial data input from the FM/AM PLL (U2)
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