Question about Hitachi UX21511 Projector Lamp for 50V500
SOURCE: Hitachi 50EX20B Bigscreen TV
You can download a PDF from here: http://www.servicemanuals.net/results.aspx?type=SM&brand=0&model=50EX20B Make sure that the coolant is not leaking out onto the printed circuit boards. i have had the remote sensor cause this problem before and also I have had bad capacitors in the sweep and the main power supplies. Good Luck
Posted on Jun 14, 2007
I have the CP-X275W that did the same thing. The ballast was bad and I fixed it with a $5 switching regulator. The CP-X327 has the identical ballast.
The High Intensity Discharge Metal Halide lamp suddenly failed to light up. A new lamp was installed and would not light up either. The fan ran and the lamp LED flashed after a few minutes. Voltage to the ballast module was 368VDC. The ballast did not pulse.
Ballast# PS-226-LS-210 was bad. Hitachi Part# HA01101 has been discontinued and the new part number is HA01102. It was $210USD at Vance Baldwin or $221USD at Part Solver.
The FET series (TR1,5,6,7,8,) seemed good: (drain-source resistance=5Kohm). Bought an identical projector on Ebay to do comparative multimeter measurements. Found resistance differences in IC01 (STRG6153). Swapped good part to bad projector, and it worked. This is a 5-pin Sanken brand switching regulator, US$5 at www.electronix.com. They have the STRTG6153, which is compatible, and may be better. The bad one removed from the circuit measures 15Kohm on pin 3 to pin 5 and the same 15Kohm when the probes are reversed. The good one measures 18Mohm and infinite when the probes are reversed.
If you would like me to fix it for you and clean all your optics, I can do it for $150USD plus $25 return shipping. Contact Chris at email@example.com.
If you have a new lamp for sale I would buy one for $100USD.
Posted on Feb 05, 2009
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