My Philips 32fp5320/26 had a fried master inverter bd, I replaced the master & slave with new bd's & the unit work fine for about 15 hours of run time, then when turned on, no pix, snd ok. The inverters stopped runnung. In deperation, i swapped out the slave bd with the orginal & it worked ok for about another 15 hours, now the same symptom again. I can not find any NG parts on the inverters. Is it looking like I got weak fl tubes? Ed P
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Re: philips 32pf5320/26 inverter failure
The 24 volt source is fine, has no ripple. I have 3.2 volt input from the control bd. The master inverter bd is 6632L-0189 & the slave is 6632L-0190a.
The orginal master inverter bd had blown ele. caps , open 6.amp smd fuse, & shorted driver IC's. The unit worked ok after changing both boards for about 15 hours. I am ordering repl bds now. sometimes when I probe for signal with my scope, the inverters start working. I am thinking that I got a marginal new inverter bd. can anyone input on this symptom? searching**** ecp
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Merry Christmas
Does anyone know how to bypass the protection ic OZ9928SN on a LG 47LG5000 inverter using a I470H1-20A MASTER pcb?
Pictures attached
Thanks in advance...12-26-2024, 05:25 AM -
This is my son’s cooler for his semi truck for his drinks the other day it started short cycling ( running for a second or two then shutting down ) and restarting four or five times then going into an error power cycle the controller then it would do the same thing again
Found a 47uf@63 volts double the ESR value of a new one
The 220uf@16 volts same as a new but 220uf@35 volt replacement capacitor
The main filtering capacitor was not replaced because I did not have that was not too tall
Where the 220uf capacitor is some type of switching power...08-30-2022, 05:28 PM -
I picked this TV out of a trash pile. When I plug it in I can hear the relay on the power supply “click” almost immediately, and then 7 seconds later there is another “click” and the power/OPC LEDs start to flash: two pulses on the power LED, one on the OPC LED. I didn't notice any sign of life from the backlight, but more on that below.....
The service manual () says this is a “DET_10V error: UR10V or A9V is not applied”, but after checking several voltages I believe the power unit is tripping off due to an overload as soon as the backlight tries to come on; this kills... -
origanlly the backlight would come on and go off in my great ability to repair I hooked up a test light per instructed master side top 6 would only partially light slave side lit test light fine, pulled tv down to bulbs, same bulbs inside only halve lit. seems master inverter at fault tested all transformers all seem fine, pulled top transformer from master double checking test points reinstalled cleaned up all connections noted on back of master center of board dark spot, checked around that area everything on top of board seems fine, resoldered the 0 resistors plugged everything back in turned...07-16-2016, 02:32 PM -
Hello, guys!
The same 32" Philips TV I was having video issues, but now I don't have standby led at all. Someone here shared with me the schematic of the power supply, and checking the voltages, I see right after the resistor R604 I'm getting 1.6 v which is too low for enabling the Gate of the Q601 mosfet (the diagram says 4.2). On the R614 resistor I'm getting 181 V in and 117 V out, then through R603 I'm getting the same 117 V in and 59.9 V out, finally getting the latter voltage in the R604 BUT getting just 1.6 V out, which is the voltage that goes on to the Gate of the Q601...
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