SECTION 3
DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
MAIN B board
TRANS board
PANEL board
LED board
MAIN A board
INPUT board
OUTLET board
PRO IND board
HP board
SP SW board
EON board
VOL board
SP TM board
I/O
Function
• IC902 Input Control LED Drive (TMP47C103N-JP47)
Pin No.
3-2. IC PIN FUNCTION
Pin Name
O
I
I
I
O
O
I
I
I
I
O
O
O
—
O
O
O
O
O
I
I
I
O
O
O
O
I
—
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
X OUT
X IN
RESET
PMD
VOL +
VOL –
SW 0
SW 1
SW 2
EON
PHONO
TUNER
CD
GND
AUX
DAT
TAPE
MON
PRY
PKY
MON
SIRCS
MUTE
SCE
SDT
SCK
STOP
+3V
System clock. (4MHz)
Reset input.
Mode select input.
Motor drive output (+).
Motor drive output (–).
Rotary switch input (CD).
Rotary switch input (TUNER).
Rotary switch input (PHONO).
EON signal input.
PHONO LED drive output.
TUNER LED drive output.
CD LED drive output.
Ground.
AUX LED drive output.
TAPE “2” LED drive output.
TAPE “1” LED drive output.
MONITOR output.
Power relay output.
Power key input.
MONITOR input.
SIRCS input.
Muting output.
Chip enble output.
Serial data output.
Serial clock output.
STOP input.
+3V Power supply.
— 5 —
— 6 —
