Monday, October 21, 2013

ZENITH PROJECTION TV_HOW TO DISCONNECT HV CONNECTOR_ IQC60H94W_IQC50H94W_IQC60H95W_IQC50H95W


CAUTIONS
Perform the following when the HV connector (anode connector) is removed or inserted for CPT replacement, etc.
  • Roll out silicon cover from FBT’s contact area slowly.
  • While turning the connector about 90 degrees following the arrow (0 position). Push the connector slightly toward the case.
Remove the connector slowly by pulling it away from the case.
  • Refer to direction for insertion as shown in Fig above (L position). Insert connector until “CLICK” sound is heard.
  • Make sure the connector is pressed right in, so that it has a good contact with the spring.
  • Confirm the contact by pulling the connector slightly. (Don’t pull hard because it may damage the connector).
  • Cover the high voltage output by carefully pushing silicon boot onto it. (Don’t turn the connector).
Make sure the silicon boot is covering the high voltage output.
High Voltage limiter circuit check
  • Turn off TV and connect jig as shown in Figure. Adjust jig fully counter clockwise for minimum resistance.
  • Set the AC input to 120V AC and turn on TV.
  • Confirm test pattern on CRT is a usable picture, then slowly adjust jig until the picture disappears and TV shuts down.
  • When the limiter circuit is operating properly, Voltage will be less than 36.5kV at 0.6mA when TV shuts down.
  • Turn off set immediately after checking circuit operations.
  • Unplug set for one minute to reset shut-down circuit.  Remove jig and voltmeter.
Remove RH 80 and connect 50K Ohm jig as shown.