Z-Sus Board - LG 42PG20 Training Manual

CIRCUIT DeSCRIPTIONS

Z-SUS BOARD

4
Provides the SUSTAIN PULSE and ERASE PULSE for generating SUSTAIN discharge in
the panel by receiving Drive signals from the Y/Z-Sus board. This waveform is supplied
to the panel through FPC (Flexible Printed Circuit (Z). Z-Bias is a "DC" adjustment. The
2
effects of this adjustment can be observed on the scope looking at the Z-Sus output.
This Waveform is just for reference to observe the effects of Zbz adjustment. Note: The
P Vzb Adjustment is a DC level adjustment.
G
2
0
42
PDP Training - Fall 2008
Z-Drive Wavefrorm
100 us/Div
"Y-Sus" P801 to "Z-Drive" P1
Pin Label Standby
1 +Vs
2 Gnd Gnd
3 ZSUS
4 Gnd Gnd
5 ZSUS
6 Gnd Gnd
7 ZSUS
8 Gnd Gnd
9 ZSUS
10 Gnd Gnd
11 ZSUS
Probe Test Point
(Vzb) Z-Bias VR905
Run Diode Mode
0V *194V Open
Gnd Gnd
0V 70.46V Open
Gnd Gnd
0V 70.46V Open
Gnd Gnd
0V 70.46V Open
Gnd Gnd
0V 70.46V Open
Gnd Gnd
0V 70.46V Open
2 ms/Div
Vzb Voltage
100V ±1V