Vsus Distribution - Panasonic TH-65PX600U Service Manual

VSUS Distribution

The sustain voltage VSUS from the power supply board (P board) is provided to the SC
board through pin 1 of connector P2/SC2. It is also provided to the SS board through pin 1
of connector SS11.
The zener diode D585 monitors the VSUS. If an over-voltage condition occurs, the VSUS
detect circuit (Q525 and Q530) is triggered and a high is output to pin 19 of IC501. When
pin 19 goes high, pin 17 also goes high to trigger the SOS4 line (pin 74 of IC9003) on the D
board.
38