Read Sony CMT-E301 / HCD-E301 Service Manual online
23
HCD-E301
6-11.
IC PIN FUNCTION DESCRIPTION
•
DISPLAY BOARD IC601
µ
PD753016AGC-F31-3B9 (SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER)
Pin No.
Pin Name
I/O
Description
1 to 20
S12 to S31
O
Segment drive signal output to the liquid crystal display (D621)
21 to 24
COM0 to COM3
O
Common drive signal output to the liquid crystal display (D621)
25
BIAS
O
Bias output for the liquid crystal display drive
26 to 28
VLC0 to VLC2
I
Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive
voltage
voltage
29
TUNER
O
Power on/off control signal output for the tuner section “L”: power on
30
TAPE
O
Audio line muting on/off control signal output “L”: muting on
31
CD
O
Power on/off control signal output for the CD section “L”: power on
32
TIMER STATUS
O
LED drive signal output of the TIMER indicator (D619) “L”: LED on
33
VSS
—
Ground terminal
34
CD-RESET
O
Reset signal output to the CD section “L”: reset
35
SURROUND
O
Not used (pull up)
36
PLL CL
O
PLL serial data transfer clock signal output to the FM/AM PLL (IC102)
37
PLL DI
O
PLL serial data output to the FM/AM PLL (IC102)
38
TUNER SD
I
FM and AM signal meter voltage detection input from the LA1823 (IC101)
39
CLOCK
O
Serial data transfer clock signal output to the LC75392 (IC203)
40
DATA
O
Serial data output to the LC75392 (IC203)
41
STEREO
I
FM stereo detection signal input from the LA1823 (IC101) “L”: stereo
42
CD CLOCK
I
Serial data transfer clock signal input from the CD section
43
RDS CLOCK
I
Serial data transfer clock signal input from the RDS decoder Not used (open)
44
REMOTE
I
Remote control signal input from the remote control receiver (RM601)
45
SYNCRO
I
Recording on detection signal input
46
MUTE
O
Audio line muting on/off control signal output “H”: muting on
47
PLLCE
O
PLL chip enable signal output to the FM/AM PLL (IC102) “H” active
48
CE
O
Chip enable signal output to the LC75392 (IC203) “H” active
49
SHRST
O
Not used (open)
50
RDS DATA
I
Serial data input from the RDS decoder Not used (open)
51
PSW
O
System power on/off control signal out “H”: power on
52
BASS BOOST
O
Mega bass on/off selection signal output “H”: mega bass on
53
DPSW2/SLEND
I
CD lid open/close detection switch (SW600) input terminal “L”: CD lid is closed
54
VDD
—
Power supply terminal
55
XT1
I
Power failure detection input terminal “L”: power failure, “H”: power on
56
XT2
O
Not used (open)
57
IC
—
Internal connection terminal (connected to power supply)
58
X1
I
Main system clock input terminal (6 MHz)
59
X2
O
Main system clock output terminal (6 MHz)
60
PLLDO SELECT
I
PLL serial data input from the FM/AM PLL (IC102)
61
CD DATA
I/O
Two-way data bus with the CD section
62
NC
—
Not used (open)
63
12/24H SELECT
I
Not used (fixed at “H”)
64 to 67
KEY R0 to
KEY R4
I
Key return signal input from the key matrix “L” input when key pressing
68
CPU RESET
I
System reset signal input from the reset signal generator (IC603) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
69 to 80
S0 to S11
O
Segment drive signal output to the liquid crystal display (D621)
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