Diagrams; Ic Pin Function; Ic501 System Control (Μpd78042Fgf-016-3B9) - Sony SA-VA10 Service Manual

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3-1. IC PIN FUNCTION

• IC501 System Control (µPD78042FGF-016-3B9)
Pin No. Pin Name
1 to 7 7G to 1G
8 VDD
9 POWER RY
10 FUNC 1/2
11 PLO/DELAY-CLK
12 PLO/DELAY-CE
13 PLO/DELAY-DATA
14 FRONT MUT
15 CENTER EXT MUT
16 S/W MUT
17 RESET
18 REAR MUT
19 CENTER MUT
20 AVSS
21 CENTER EXT/INT
22 —
23 MODE
24 VOL SCL
25 —
TE
L 13942296513
26 SW1
27 KEY 1
KEY 0
28
29 AVDD
30 AVREF
31 STOP
32 XT2
33 VSS
34 X1
35 X2
36 S/W BOOST
37 to 40 S/W C1 to S/W C4
41 CENTER EXT-SW
• Abbreviation
FL : Fluorescent indicator tube
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SECTION 3

DIAGRAMS

I/O
O FL grid control
— Power supply terminal (+5V)
O Power relay control
O Input select control (L: input 2 H: input 1)
O
O Prologic/Delay IC (IC103) serial control
O
O
O Mute control ("L"=Mute)
O
System reset
I
O
Mute control ("L"=Mute)
O
Ground for A/D convertor
—
Center speaker switching control
O
—
Not used (Connected to ground)
—
Audio processor IC (IC203, 204) serial control
O
Not used (Connected to ground)
—
Audio signal detection (L: Sound input H: No sound input)
I
I
Key input (analog)
I
— Analog power supply for A/D convertor
— Reference voltage for A/D convertor (Connected to +5V)
I Voltage detect (AC off)
— Not used (Open)
— Ground
I
Oscillation crystal (5 MHz) for main system clock
O
O Sub woofer boost control (H: off L: on)
O Super woofer level control
Connecting detection of external center output
I
(L: Connecting signal input H: No connecting signal input)
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Function
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