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NOTE:
1.
This IR-pass-through code is different from the RCU key code.
2.
Special control sequence for POWER key under IR-pass through mode.
2-1.
When TV/DS is OFF and receives the IR POWER code: TV/DS will turn itself
on, then forward the POWER code to the host via RS232.
2-2.
When TV/DS is ON and receives the IR POWER code: TV/DS will forward the
POWER code to the host via RS232, then turn off itself.
2-3.
When SET-POWER LOCK is enabled, the TV/DS will not respond to POWER
key pressing.
3.
The VOLUME UP and VOLUME DOWN code will repeatedly output when you
press and hold the keys.