Forum: General Electronics Technical Discussion
08-15-2022, 04:02 PM
|
|
Replies: 16
Views: 222
|
|
Forum: General Electronics Technical Discussion
08-14-2022, 11:21 AM
|
|
Replies: 31
Views: 412
Re: Help me with capacitors replacement
The fuse on the board is on the DC side of the bridge, there should also be a fuse on the AC input to the bridge, if not that would explain the destruction of the bridge rectifier. Looks like the...
|
|
Forum: General Electronics Technical Discussion
08-14-2022, 11:08 AM
|
|
Replies: 31
Views: 412
|
|
Forum: General Electronics Technical Discussion
08-13-2022, 08:50 PM
|
|
Replies: 31
Views: 412
|
|
Forum: General Electronics Technical Discussion
08-13-2022, 06:19 PM
|
|
Replies: 31
Views: 412
Re: Help me with capacitors replacement
What value of fuse is in the board? The diode 2W10M (2AMP/1KV) should be fine, If this is the wire feed motor drive circuit I would check the wire feed motor etc. for a problem, It may be that the...
|
|
Forum: General Electronics Technical Discussion
08-12-2022, 05:45 PM
|
|
Replies: 31
Views: 412
|
|
Forum: Troubleshooting TVs and Video Sources
08-11-2022, 12:01 PM
|
|
Replies: 6
Views: 242
Re: Authorized Repair Center Charges
This is fine when you work out of your home, but operating a business you need to charge for estimate/diagnostics, fee. $40.00 is about normal. Look at all the electronic repair shops there are now,...
|
|
Forum: General Capacitor Questions & Issues
08-10-2022, 06:10 PM
|
|
Replies: 15
Views: 334
Re: Indentifying an old exploded cap.
It may have been brown, orange, brown, silver 130Ω 10% ntc likely not too critical, it changes the resistance across the 68Ω to slightly vary the output transistors bias when the temperature changes
|
|
Forum: General Capacitor Questions & Issues
08-10-2022, 05:01 PM
|
|
Replies: 15
Views: 334
Re: Indentifying an old exploded cap.
My guess is a thermistor, warm it up a bit and recheck the resistance. This is the best I can figure out because of the glue etc.
It may be a similar circuit to this (I said similar) in the ampf1...
|
|
Forum: General Capacitor Questions & Issues
08-10-2022, 04:21 PM
|
|
Replies: 15
Views: 334
Re: Indentifying an old exploded cap.
It appears to be across that 68Ω resistor, so it could be a thermistor used for temperature compensation? or just a bypass cap, .1 or .01 µf
Can you check the parts resistance? that might give a...
|
|
Forum: General Capacitor Questions & Issues
08-10-2022, 09:32 AM
|
|
Replies: 15
Views: 334
|
|
Forum: General Capacitor Questions & Issues
08-09-2022, 09:25 PM
|
|
Replies: 15
Views: 334
|
|
Forum: General Capacitor Questions & Issues
08-05-2022, 05:19 PM
|
|
Replies: 36
Views: 919
|
|
Forum: Troubleshooting Audio Equipment
08-04-2022, 07:36 PM
|
|
Replies: 6
Views: 164
|
|
Forum: Troubleshooting Computer Displays
08-03-2022, 05:45 PM
|
|
Replies: 96
Views: 60,510
|
|
Forum: Troubleshooting Computer Displays
08-03-2022, 05:31 PM
|
|
Replies: 64
Views: 24,766
Re: Dell P1110 21" CRT repair thread
Does the fuse blow as soon as it is plugged in or do you need to press the power button and then it blows?
If it blows as soon as it is plugged in, suspect VDR601 is shorted. Next could be the...
|
|
Forum: Troubleshooting Audio Equipment
08-03-2022, 05:07 PM
|
|
Replies: 6
Views: 164
Re: Klipsch RSW-12 subwoofer won't power on
There are schematics for the RW-10 and RW-12, I don't know how close they might be. Maybe post some pictures of the boards.
There is also a RSW-15 available that might be close.
|
|
Forum: Troubleshooting Audio Equipment
08-03-2022, 12:58 PM
|
|
Replies: 6
Views: 164
|
|
Forum: Troubleshooting Computer Displays
07-31-2022, 10:05 PM
|
|
Replies: 3
Views: 179
Re: LG Flatron W2361V PSU Troubleshooting
From what I can tell, If you have the +5v you should also have the +22v, both are supplied by the same transformer, so check the connections on the transformer and D201,D205.
I would start by...
|
|
Forum: Troubleshooting TVs and Video Sources
07-31-2022, 10:39 AM
|
|
Replies: 6
Views: 247
Re: Samsung BN44-00516A no 5v Stby
When NT801s goes open it is because the relay contacts are bad, If you don't either clean the relay contacts or replace the relay the ntc will go open again.
If the ntc is warm when the tv is ON...
|
|
Forum: Troubleshooting TVs and Video Sources
07-30-2022, 08:19 PM
|
|
Replies: 6
Views: 247
Re: Samsung BN44-00516A no 5v Stby
TX801s is the standby transformer, F802s supplies voltage to the transformer primary winding and then to the standby ic. This ic is covered in silicon on the top of the board
Do you have any voltage...
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
07-29-2022, 09:54 AM
|
|
Replies: 2
Views: 105
Re: Ch341 won't read only when the chip soldered
When the spi chip is on the board and you use a test clip you are also trying to power the whole board from the programmer, like the microprocessor ic etc. Also if the micro does power up, it is also...
|
|
Forum: Troubleshooting TVs and Video Sources
07-28-2022, 07:07 PM
|
|
Replies: 16
Views: 488
|
