Ic Block Diagrams; Ic Pin Function - Sony TA-FB920R Service Manual

3-10. IC BLOCK DIAGRAMS

• Main section
IC700 uPC1237HA
OVER LOAD DET
V CC ON
F/F
MUTE
OFFSET DET
LATCH/
AUTORESET
AC OFF
DET
V CC
1 2 3 4 5 6 7 8
• Panel section
IC901 BA6208
MOTOR
SWITCH
DRIVE
MOTOR
SWITCH
DRIVE
REG
1 2 3 4 5 6 7 8 9
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3-11. IC PIN FUNCTION

• IC902 Input Control & LED Drive (TMP47C103N-JP47)
Pin No. Pin Name I/O
1 X OUT O
System clock (4MHz)
2 X IN I
3 I
RESET Reset input
4 PMD I Mode select input (Connected to ground)
5 O
VOL + Motor drive output (+)
6
VOL – O Motor drive output (–)
7 SW 0 I
Rotary switch input (CD)
8
SW 1 I Rotary switch input (TUNER)
9
SW 2 I Rotary switch input (PHONO)
I
10 EON EON signal input
11
PHONO O PHONO LED drive output
12
TUNER O TUNER LED drive output
13 CD O CD LED drive output
14 GND — Ground
15 AUX O AUX LED drive output
16 MD/DAT O TAPE "2" LED drive output
17 TAPE O
TAPE "1" LED drive output
18 MON O MONITOR output (Connected to ground)
19 PRY O Power relay output
20 I
PKY Power key input (Connected to ground)
21 MOI I MONITOR input (Connected to ground)
22 SIRCS I
SIRCS input
23
MUTE O Muting output (Connected to ground)
24 O
SCE Chip enble output (Connected to ground)
25 O
SDT Serial data output (Connected to ground)
26
SCK O Serial clock output (Connected to ground)
27 STOP I STOP input
28
+3V — +3V Power supply
Function
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