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CIRCUIT DESCRIPTIONS
The Microprocessor uses a combination of I
2
C Bus com-
munication and the Serial Data, Clock and Load lines
for control. The I
2
C communication scheme only requires
2 lines for control. These lines are called SDA and SCL.
Serial Data and Serial Clock respectively.
SRS AUDIO +29V REGULATOR INDICATED BY D912.
The SRS Audio +29V supply is generated from pin (8) of
T901. This output is rectified by D910 and filtered by
C915. The choke L912 adds further filtration and C917
removes high frequency switching noise. This supply is
routed to the SRS Audio Output IC IJ01 via the connector
PAQ1 pin 1 and 2.
This voltage is what illuminates the Green Visual Trouble
Shooting LED, D912.
3-15
PV154 - 923-03506
ZP26/28 - SERVICING
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