SOS Detect (D and PA Board)
Figure 38
The SOS detection circuits of the standard definition model TH-42PD50 is similar to the
one used in the high definition models. They are monitored by two microprocessors,
IC4005 of the DG board and IC9003.of the D board. IC4005 of the DG board monitors
for an abnormality detected on the PA and the PB boards. The abnormality may due to
an over-voltage or a short circuit located on the PA or one of the boards powered by PA
board. The SOS input at pin 111 is an active high when an abnormality is detected. The
MPU IC9003 of the D board monitors a variety of SOS inputs.
All other SOS conditions
are monitored by IC4005 located on the D board (see fig. 37). Upon detection, the MPU
IC9003 of the D board relates the information to pin 110 (Panel_SOS) of IC4005,
located on the DG board, to trigger the shutdown of the unit.
42
Summary of Contents for TH37PX50U - 37" HD PLASMA TV
Page 40: ...SC board Waveform Figure 30 SU And SD Board Shift Registers Figure 31 35 ...
Page 43: ...SS Board Schematic Figure 33 SS Board Waveform Figure 34 38 ...
Page 66: ...Adjustment Volume Locations Figure 53 61 ...
Page 67: ...Test Point Locations Figure 54 62 ...
Page 71: ...Scan and Sustain Drive Waveform Figure 55 Scan and Sustain Drive Check points Figure 56 66 ...
