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Bulb Thermal Cycle?

01-01-2006, 10:34 AM
I have been following the discussion on bulb life (mainly JVC) for several weeks. No where have I seen mention of how a set was used. I don't think it should make a difference, but how often did the sets with problems go through a thermal cycle? I am no expert by far, but seems to me that if the sets experiencing bulb failure had any other facts in common, it might be that they were on/off several times a day?

This is my first post and am just trying to figure out what to get for my first HDTV. The bulb issue seems to be the main problem I hear, and it seems like a problem that should be fixed. Is there any pattern between how the set is used and bulb failure?

I have enjoyed greatly the opinions on this forum. Thanks... :yippee:

01-01-2006, 12:26 PM
Thermal Cycle

On/Off Cycles w/average time set is on

Monday thru Friday
On @ 5am Off @ 7am (2 hours)
On @ 3pm Off @ 10pm (7 hours)

Saturday and Sunday
On @ 9am Off @ 12pm (15 hours)
Average thermal cycles per week = 12
Average time set is on (lamp time) per week = 69

21 weeks of operation (time since new)

Total thermal (on/off) cycles = 252
Total lamp time = 1449


01-01-2006, 01:37 PM
I am guessing you have had no bulb failure? Your usage is pretty close to mine I would guess. I am really leaning towards getting the JVC HD70FH96. Just trying to get myself reassured about the bulb issue. I wonder what the cycles are like for those having the repeated problems with burnout?

Good analysis, Muleskinner.

01-01-2006, 02:54 PM
Actually, I just replaced my first lamp after 21 weeks of usage. My HD-52G886 was delivered (first viewing) July 28th this year, and the 1st bulb blew on December 23rd. JVC Customer Service shipped me a 'replacement lamp kit' FedX 2nd day. I am now on my second lamp.