Question about Hitachi 43FDX01B TV
It's probably either a bad red CRT (the red projection tube) or a shorted (or open) driver transistor on the red CRT driver board. If it's the latter case (bad transistor), it can be fixed. If it's the picture tube, well, it's probably time to go shopping for a new TV.
Do you need more information? Do you want to fix it yourself? Do you have electronics knowledge and experience? If not, call a qualified electronic technician (TV repairman), and he can tell you if it's the picture tube or not.
IF (and only if) you are a competant electronic technician, CAREFULLY check and compare the voltage on the collector of the driver transistor on the 3 CRT boards. (The driver transistor is the large one, possibly connected to a heat sink.) The voltages shoud be somewhere around 140 to 160 volts. If the red one is significantly different from the green and blue ones, then it's probably the transistor. Unplug the set (and wait a bit), and check the transistor with a diode or transistor checker. If it checks bad, then you found a bad transistor. Go to NTE Electronic's website to find a replacement. If it checks OK, then you're probably looking at bad (shorted) red CRT.
Posted on Dec 17, 2009
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Posted on Jan 02, 2017
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