Lamp Control - Ricoh Sirius-PJ1 nx Service Training

SW_PWB EX_PWB
COVER
SW
Bi-metallic
Slide 107
Lamp on/off is controlled by High/Low of TightCell2 (IC4502)'s Port: LAMP_PW
signals. Also, the lit status monitoring and brightness are controlled by the serial
communication function of TightCell2 (TXD_LAMP/RXD_LAMP). The LAMP_PW
signal's lighting control is enabled only when the status of lamp cover, bimetal,
and fan are in the normal state. In other cases, TightCell2 will detect the
mechanical signal (COVERDET/LAMPHOT/FANDET1~8) and turn off the lamp.
Also, there is an ECO Mode and this controls the lamp power as follows:
When ECO is OFF: Lamp power is 100%
When ECO is ON: Lamp power is 80%

Lamp Control

COVER_DET
LAMPHOT
IC4001 IC 4502
Local Bus
SH7670 TightCell2
CPU Gate Array
FANDET1~8
107
MAIN_PWB
RXD_LAMP
TXD_LAMP
LAMP_PW
POLM
BALLAST UNIT
LAMP LAMP LAMP
HOUSE HOUSE HOUSE
Sirius-PJ1Training