Short Circuit Detection of Main Voltage (10 Blinks)
Figure 40
The transistor Q5642 monitors the MAIN_9V, MAIN_2.5V, and MAIN_5V lines. If any of
these supply lines develop a short circuit, transistor Q5642 goes into conduction and
applies a high to pin 111 of the MPU, IC4005, triggering an SOS condition.
44
Summary of Contents for TH-42PX50U
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 ...
