Read Sony CFD-S36 (serv.man2) Service Manual online
16
CFD-S36
6-1. IC PIN DESCRIPTION
• IC802 uPD789477-907 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Pin Description
1, 2
NC
—
Not used. (Open)
3 – 5
VLC2 – 0
O
LCD drive voltage output
6 – 9
COM0 – 3
O
LCD drive common output
10 – 26
S0 – 16
O
LCD drive segment output
27 – 29
S17 – 19
O
LCD drive segment output Not used. (Open)
30
BL-CONT
—
Not used. (Open)
31
A-MUTE
O
Audio mute output H: Mute
32
WB/FM.AM.TV
O
Tuner output level attenuator switch Not used. (Open)
33
DBB
O
MEGA BASS control output H: MEGA BASS off, L: MEGA BASS on
34
P-CON
O
System power control output H: PCON
35
AC-CHK
I
AC power supply detection signal input “L”: AC in
36
CD
O
CD function output H: CD
37
TAPE
O
Tape function output H: Tape
38
AVDD
—
Analog power supply pin for A/D converter (+3.3 V)
39
BTT-CHK-H
I
Battery check input for Hi-voltage
40
BTT-CHK-M
I
Battery check input for Mid-voltage
41
REC
I
Tape record signal input H: REC
42 – 45
KEY1 – 4
I
Key input
46
MODE CHK
I
Mode set input
47
AGND
—
Analog GND for A/D converter
48
REMOTE
I
Sircs receiver data input
49
TC-PLAY
I
Tape play switch input L: Tape
50
WP/INI
O
Initial set signal output
51
CD-DOOR
I
CD door open/close switch input L: Close
52
C-WRQ
I
CD command data input
53
C-DOUT
I
CD sireal data input
54
C-DIN
O
CD sireal data output
55
C-CLK
I
Serial data transfer clock signal input
56
R-COUNT
I
Tuner PLL data input
57
R-DATA
O
Tuner PLL data output
58
R-CLK
O
Tuner PLL clock output
59
R-LAT
O
Tuner PLL latch output
60
B-MUTE
O
Tuner mute signal output H: Mute
61
C-DRF
I
CD DRF signal input
62
C-CE
O
CD SENSE read clock output
63
C-FSEQ
I
CD frame SYNC input
64
C-XRT
O
CD system reset output
65
V-LAT
O
Volume latch output Not used. (Open)
66
V-DATA
O
Volume data output
67
V-CLK
O
Volume clock output
68
SUR
O
Surround switch signal output
69
ICO
—
Connected to GND
70
XT1
I
Sub system oscillation input (32.768 kHz)
71
XT2
O
Sub system oscillation output (32.768 kHz)
72
VDD
—
Main power supply pin for A/D converter (+3.3 V)
73
VSS
—
Main GND
74
X1
I
Main system oscillation input (4.19 MHz)
SECTION 6
DIAGRAMS
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