Sony SA-VA15 - Page 5

SECTION 2
DIAGRAMS
2-1. IC PIN FUNCTION
¢ 1C501 System Control IC ( uPD78042AGF-065-3B9)
[Pine | PinName UO] SSCS SSSCSC~C~S~*
| 3s [wo [- | Power supply terminal (+5V)
| 9 | POWERRY | O-| Power relay control
P10 [runcia | 0 | tnpuacectcneel (cio? Hip) SSS
[| riopenavek | 0 |
| 12 | PLOMELAY-CE ——|_ O_| > Dolby IC (IC 103, 104) serial control
pa [rmonrr «dt |
is | CENTER EXTMOT | 0
[is _[swmur «dt
17 RESET
18 REAR MUT
19 CENTER MUT
20 AVSS
21 CENTER EXT/INT
22, 23
24
Mute control (“L”=Mute)
System reset
Mute control (“L”=Mute)
Dolby IC (1C103, 104) serial control
} Key input (analog)
Analog power supply for A/D convertor
Reference voltage for A/D convertor
Voltage detect
Not used (open)
GND
VOL SCL
NTN ni wm
n
_
Ww
KEY 1
KEY 0
AVDD
AVREF
STOP
T2
S
27
28
29
30
31
WwW N
Ww
x
Vv.
Mn
Ww a x i)
} Oscillation crystal (S MHz) for main system clock
36 S/W BOOST
37 S/W VOL-CE
38 S/W VOL-DATA
39 S/W VOL-CLK
SUB WOOFER boost control (H: off L: on)
w bp
_
S. WOOFER VOL (IC403) serial control
Connecting detection of external center output
40 aie ; nd ,
(L: Connecting signal input H: No connecting signal input)
CENTER EXT-SW