Sharp 61U-WP7H Service Manual page 11

High Voltage Shutdown Circuit Operation Check
1. Turn off TV and connect Jig as shown in Figure.
2. Set the AC line voltage to 120V AC and turn on the TV.
3. Confirm a usable picture by receiving a TV test pattern.
4. Measure the normal voltage between TP653 and TP651. It should be 8.1± 0.7VDC.
5. Insert 13.5VDC between TP653 and TP651 and confirm that high voltage shutdown occurred.
6. Turn off TV and disconnect Jig.
TV Test Point
Test Jig
TV SET
TP651-3
SW-1
DHHS
+
DIGITAL
VOLTMETER
–
8.1±0.7VDC
DC POWER
SUPLLY
TP651/3
13.5VDC
11
61U-WP7H
55U-WP7H