3. Important safety tests
Measuring H.V.
The anode caps are cemented to the CRTs. To gain access for high voltage measurement,
remove the red CRT’s anode lead from the flyback transformer distributor. Grasp the anode lead
protective cap at its bottom and squeeze it against thelocking cap body inside, rotate 1/4 turn
counter clockwise and pull the anode lead sleeve out of the FBT distributor. Connect a high
voltage positive lead from your H.V. meter to the FBT distributor, and the common negative lead
to cold ground
FBT leads removal
Note:
Reinsert the anode lead into the FBT distributor until it is tightly and fully seated. Turn the
locking cap clockwise to lock in place.
(EHT) Protector operation check
With the cabinet back removed, apply a nominal 120V A.C. to the PTV.
Over voltage test
Preparation:
1. Turn PTV “OFF”
2. Connect a NTSC signal generator to the antenna terminal.
3. Connect DVM positive lead to D31 pin 2 and negative lead to D31
5
Содержание PT-56WX53G
Страница 82: ...5 PTV Location of controls 10 ...
Страница 93: ...A BOARD 21 ...
Страница 94: ...D BOARD 22 ...
Страница 95: ...R BOARD VIEW DC BOARD TOP VIEW 23 ...
Страница 96: ...DC BOARD BOTTOM VIEW DV BOARD 24 ...
Страница 97: ...DG BOARD TOP VIEW DG BOARD BOTTOM VIEW 25 ...
Страница 147: ...19 5 Instructional flow for service mode 75 ...
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Страница 149: ...20 Reference of PDF links color 21 Conductor views 77 ...
Страница 151: ...22 2 Video block diagram 23 Schematic diagrams 23 1 Schematic diagrams notes 79 ...
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Страница 153: ...23 2 Notas de los diagramas esquematicos 81 ...
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Страница 156: ...23 27 Voltages 23 28 Waveforms 24 Parts location 25 Parts list 25 1 Description of abbreviations guide 84 ...
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