LG 50PS60 Training Manual page 82

Z - SUS PWB Testing without Y
Z - SUS PWB Testing without Y
PREPARATION:
1) The Power Supply must be working normally under Light Bulb test.
2) Leave the Light Bulbs in place for the following test.
3) Jump the 17V from pin 1 or pin 2 P814 to the Z-SUS
connector P100 1~5. (See note below)
4) Place the Scope on the Z-SUS
waveform Test Point FL103.
5) Confirm there is an Output from the
Z-SUS PWB
(approximate 230V p/p in this test)
This test confirms that the Power Supply,
Control Board and Z-SUS boards
are all working OK.
Note:
If the Y-SUS is defective, but is still able to generate the 17V, then just jump M5V to the Y-SUS board,
load the Vs with two light bulbs.
No other jumpers are required to test SMPS, Control and Z-SUS boards.
- SUS
- SUS
41V RMS
81
Light bulbs must remain
connected to the Vs from the
Power Supply to Gnd.
Failure to do so, will cause the
17V to fluxuate and cause the
Z-SUS to shutdown.
260V p/p (Normal)
Fall 2009 1080P Plasma 50PS60