Plug in the power supply plug, the light on the TV to orange, press the power switch, indicator light changed from orange to red, then get out and hear machine there is a little small voice, after 20 seconds, a little stop, light red again. bz2service manual download site
 bz2service manual download site
Boot measurement + B (140 v) voltage swing between 0 ~ 8 v, output voltage at 0 v after 20 seconds. This is generally due to the power load is overweight, protective circuit, forcing power supply stops working (red light). To this end, maintenance and repair work should the load circuit of power supply. bz2service manual download site
 bz2service manual download site
 bz2service manual download site
 bz2service manual download site
1. Measuring the power positive and negative to the resistance value of the output circuit in order to rapidly detect whether the heavy load. Measurement results only a + B (140 v) circuit reverse resistance dysplasia (85 Ω), so to cope with the 140 v circuit key inspection. bz2service manual download site
2. The line output transformer T55l pet-name ruby foot with the release of 140 v circuit, measuring 140 v of resistance value returned to normal. The boot, measuring + B output is 140 v, man also disappear. It seems that the failure of T551. Measured again, T551 attending feet, or 85 Ω to ground resistance and T55l is broken? Again to examine, T551 will T55l attending pet-name ruby was 6 (5) (3) to (2) all the foot off the measurement result is T551 pet-name ruby was attending the feet are interlinked, and the resistance value is up, not to short circuit phenomenon, T551 is normal. It should be pointed out that (5) 6 foot for a winding, a winding (2) (3) feet. End foot doesn't like painting in random drawings and (2) (3) feet winding are interlinked. Seems there is an error in the machine attached to the circuit drawing. bz2service manual download site
3. To continue to check T551 was foot circuit, end feet is put to use 210 v of winding. Check 210 v side of only 6 Ω resistance, this is by far the most unusual of check the site, to continue to check 210 v circuit, found that blue depending on the place a IC353 (6) feet of short circuit, almost IC353 is bad. Its replacement, restore the original maintenance to take off the open circuit point, when the boot image, sound normal.

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