Service Hints - Sanyo DS19310 Service Manual

POWER FAILURE DETECTOR
This set is equipped with a Power Failure Detector function included in the CPU which checks for an abnormal condition in the
chassis power supplies, including the power supply derived from the Horizontal Output Transformer.
If, while the power is on, a failure is caused by any of the following which results in a low voltage supply, the CPU will turn the set off
in 1.5 seconds to prevent unnecessary damage:
•
Failure within the power supply circuits.
•
A short circuit in the load side from the supply.
•
Stoppage of the Horizontal Output Oscillator caused by the X-Radiation protection Hold-Down Circuit.
If, while the power is off, the power is switched on and any of these failures remains uncorrected, the CPU will shut off the power
within 3 seconds.
Check the following if the set is turned off by the power failure detector.
1. Disconnect the AC power cord (120V AC line) for at least 10 seconds.
2. Connect a DC Voltmeter to the following TEST POINTS.
3. Press the power key and check for the proper voltage supplies.
4. If any of these voltages is low, the power failure detector should turn the set off within 3 seconds.
5. Check all circuits listed above.
Note: This set is equipped with a Power Surge Protection feature included in the CPU. If power failure occurs three times within 15
minutes, the CPU will automatically stop functioning to help prevent secondary damage. (TV will not turn on by pressing the
power key.) To reset the operating programs within the CPU, disconnect the AC power cord for at least 10 seconds.

SERVICE HINTS

TJ5
TJ6
D429 Cathode
D802 Cathode
— 9 —
9V
7.6V
10V
14.5V