Dmd Bias Voltage Adjustment - Mitsubishi Electric XD8100U Service Manual

DMD BIAS VOLTAGE ADJUSTMENT

This adjustment is nessesaly when exchaged the DMD chip, the PCB DMD ASSY, or the Optical Unit,.
Procedure:
1, Check the bias voltage setteing code printed on the DMD chip to be mounted on the DMD PCB ASSY.
2, When you exchange optical unit ,confi rm the value of BINSEL marked on the PCB DMD ASSY.
Fig.2. Marking of the code for bias voltage setting ( BINSEL setting)
3, The following command is transmitted from the hyper terminal according to the code for the setting of the voltage of the bias
confi rmed by 1 or 2.
4,Confi rm that the transmission command are sent back to the hyper terminal window as it is as a reply command.
Fig.1. DMD bias voltage setting code
Code for setting of voltage of bias
B
C
D
E
Bias voltage
setting code
Transmission command
~
00 BINSEL0
~
00 BINSEL1
~
00 BINSEL2
~
00 BINSEL3
- 5 -
Marking of the
BINSEL setting