Toshiba 13A21 Service Manual page 40

5.3.1.3 Hardware protected (Ballast board).
5.3.2 Protection functions list.
Item Function
Lamp MCU (IC404) detect the DMD
working BD. "LAMPLITZ" (pin P25)
detection voltage level.
MCU (IC404) detect the pin1
Fan rotate
voltage of CN5001, CN5002
detection
and CN5003.
Description Condition
Normal
Condition
Abnormal
condition
Normal
Condition
Abnormal
condition
Specification
TTL low level
MCU re-ignition the lamp for 5
times, if still fail the lamp ignition,
TTL high level
stop the TV power up, show failure
status by LED.
TTL low level
MCU turn off the lamp, by set the
Rubycon ballast CN02 PIN4 and
PIN5 to high.
1.(MCU pinP26 (LAMPSYNCEN)
-->CN404 pin28-->DMD BD
CN9002
TTL high level
pin28-->Q9004/Q9003(buffer)-->Ba
llast pin4(Lamp Enable set to high);
2.(MCU pinP24 (LAMPPWR)
-->CN404 pin10-->DMD BD
CN9002 pin10-->Q9005-->Ballast
pin5(ECO-LPS set to high))
40
Result Recovery
Remote off/on to
re-start up and
re-ignition
Remote off/on to
re-start up