Service manual

PV151 1-2 PROJO

TECHNICAL CAUTIONS

High Voltage limiter circuit check

1. Turn off TV and connect jig as shown in Figure 2.

Adjust jig fully counter clockwise for minimun

resistance.

2. Set the AC input to 120V AC and turn on TV.

3. Confirm test pattern on CRT is a usable picture, then

slowly adjust jig until the picture disappears and TV

shuts down.

4. When the limiter circuit is operating properly, Voltage

will be less than 36.5kV at 0.6mA when TV shuts down.

5. Turn off set immediately after checking circuit operations.

6. Unplug set for one minute to reset shutdown circuit.

Remove jig and voltmeter.

Figure 2. Deflection/Power PCB

SECTION 1

High Voltage

Connector

FBT

)

(TH01

Defelection

P.W.B.

Chassis Ground

High Impedance

H.V. Meter

FBT

TP91

RH80

POWER/DEFLECTION PWB

50K Ohm VR

JIG

Remove 80 and connect 50K Ohm jig as shown

RH44