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12
DP
55
12
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 50K
Ω
VR jig as shown.
TH02
FBT
50K
Ω
VR
50K
Ω
VR
33K
Ω
Resistor
33K
Ω
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
KKX1
TABLE OF CONTENTS
X901
R901
C901
L901
WHITE side
GND side
PPT1
F901
2
PA
KKX1
Tester
Содержание 51F710A/DP55
Страница 46: ......
Страница 96: ......
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Страница 102: ...DP55 CIRCUIT BLOCK DIAGRAM TABLE OF CONTENTS 101 ...
Страница 103: ...DP55 CONNECTION DIAGRAM TABLE OF CONTENTS 102 ...
Страница 107: ...106 DP55 CPT P W B TABLE OF CONTENTS ...
Страница 109: ...TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 108 ...
Страница 110: ...TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 109 ...
Страница 111: ...TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 110 ...
Страница 112: ...TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 111 ...
Страница 113: ...TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 112 ...
Страница 114: ...TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS FINAL WIRING DIAGRAM TABLE OF CONTENTS TABLE OF CONTENTS DP55 113 ...
Страница 153: ...BACK TO TABLE OF CONTENTS PRINTED CIRCUIT BOARDS DP55 SIGNAL PWB Solder side DP55 152 ...
Страница 157: ...BACK TO TABLE OF CONTENTS PRINTED CIRCUIT BOARDS DP55 DEFLECTION PWB Solder side DP55 156 ...
Страница 161: ...BACK TO TABLE OF CONTENTS PRINTED CIRCUIT BOARDS DP55 CPT PWB Solder side DP55 160 ...
Страница 187: ......