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DP65

High Voltage limiter circuit operation check.

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

jig fully counter-clockwise for minimum 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, High

Voltage will be less than 37 kV at 1.62mA when TV shuts

down.

5. Turn off set immediately after checking circuit operation.

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

Remove jig and voltmeter.

TECHNICAL CAUTIONS

(TH02)

RH19

RH17

Fig. 2. Power/Deflection P.W.B

Remove RH19 and connect 50KΩ VR jig as shown.

TH02

FBT

50KΩ VR

33KΩ

Resistor

33KΩ

AC CORD POLARITY

This check is based on the UL standard. Use the jigs

specified by the production technology section. The

GND side (wider blade) of the AC power cord should

be connected to KKC2

TABLE OF CONTENTS

X901

R901

C901

L901

WHITE side

GND side

F901

Tester

WHITE side =

Hitachi 57F59A User Manual

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