Integra PLA-50FP1 Manual page 114

(7) Control lock block
When S2001 is turned on (pressed condition) inside the 232C PWB, Pin 19 of the microcomputer IC9501 is
turned "H" and all keys other than the POWER key of the set main body are disabled.
(8) PDP module control block
With the PDP module, information about the screen position and input signals is controlled by the micro-
computer through the bus SDATA, SCK, and LE. Power save control for the PDP module is effected through
Pins 32, 33, 34, 35, and 36 of the AD connector. Pin 34 is used for the average brightness data input from
the PDP module.
(9) Voice control block
The AUDIO unit controls the sound volume, balance, and the sound quality through IC9505 with the aid of
the bus SDA2AE and SCL2AE. Transmission of the voice output is suspended when Pin 3 of the AE
connector (SMUTE terminal) is at the "H" level or when Pin 4 of the AE connector (POMUTE terminal) is at
the "L" level.
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