Toshiba 1997 G Series Troubleshooting Manual - Page 23
Browse online or download pdf Troubleshooting Manual for TV Toshiba 1997 G Series. Toshiba 1997 G Series 28 pages. Color television power supply and shutdown
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3. +30 Volt Over Voltage Protect.
When the supply voltage goes beyond the zener votage,
the zener diode conducts and delivers a voltage to the
anode of D 863. This passes through the diode switch,
D863, to pin 14 of Z801, and shut down takes place.
4. +15V Over Voltage Protect.
The +15V over voltage protect operates in a similar fash-
ion as the +30V over votage protect.
Normal voltage at the monitor point is about 0. A volt-
age of about 2.5V or greater will result in shut down.
Figure 15. +30V Over Voltage Protect.
Figure 16. +15V Over Voltage Protect.
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JRS 12-97