10
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 31.5 kV at 1.5mA 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
TP91
CP16
IP04
Remove RH80 and connect 50K
Ω
VR jig as shown.
FBT
RH80
TP91
POWER/DEFLECTION PWB
RH44
50K½VR
Chassis ground
High impedance
H.V. meter
Deflection P.W.B.
FBT
(TH01)
High voltage
connector
Fig. 2. Deflection/Power P.C.B.
Содержание 50NP4
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Страница 64: ...PRINTED CIRCUIT BOARD 61 2H Video Terminal P W B ...
Страница 65: ...PRINTED CIRCUIT BOARD DEFLECTION P W B 62 ...
Страница 66: ...PRINTED CIRCUIT BOARD SIGNAL P W B 63 ...
Страница 67: ...PRINTED CIRCUIT BOARD VM SENSOR 2 64 ...
Страница 68: ...PRINTED CIRCUIT BOARD POWER SUPPLY P W B 65 ...
Страница 69: ...PRINTED CIRCUIT BOARD SRS P W B 66 ...
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Страница 73: ...70 50NP4 WIRING DRAWING ...
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Страница 75: ...72 BLOCK DIAGRAM ...
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