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Search: Posts Made By: R_J
Forum: General Electronics Technical Discussion Yesterday, 08:50 PM
Replies: 24
Views: 220
Posted By R_J
Re: Help me with capacitors replacement

Tell me every rectifier you have in your collection and I will recommend one. There are not that many that will fit that space.
Forum: General Electronics Technical Discussion Yesterday, 06:19 PM
Replies: 24
Views: 220
Posted By R_J
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: 24
Views: 220
Posted By R_J
Re: Help me with capacitors replacement

It's not a capacitor, it is a 2W10 bridge rectifier. Here is a picture in case the others disappear in the future.
Forum: Troubleshooting TVs and Video Sources 08-11-2022, 12:01 PM
Replies: 6
Views: 206
Posted By R_J
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: 252
Posted By R_J
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: 252
Posted By R_J
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: 252
Posted By R_J
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 f
Can you check the parts resistance? that might give a...
Forum: General Capacitor Questions & Issues 08-10-2022, 09:32 AM
Replies: 15
Views: 252
Posted By R_J
Re: Indentifying an old exploded cap.

Hard to tell without knowing where it is located in the actual circuit.
Forum: General Capacitor Questions & Issues 08-09-2022, 09:25 PM
Replies: 15
Views: 252
Posted By R_J
Re: Indentifying an old exploded cap.

How can we tell where it connected without a picture of the trace side of the board?
Forum: General Capacitor Questions & Issues 08-05-2022, 05:19 PM
Replies: 36
Views: 891
Posted By R_J
Re: What are the 'actual' effects of old electrolytics in a vintage radio?

The missing decoder will likely be for the FM Stereo, without it you will only receive FM mono.
I would start by cleaning the switches with a cleaner like deoxit, The voltage for the radio section...
Forum: Troubleshooting Audio Equipment 08-04-2022, 07:36 PM
Replies: 6
Views: 151
Posted By R_J
Re: Klipsch RSW-12 subwoofer won't power on

Here is the RSW-15 service manual
Forum: Troubleshooting Computer Displays 08-03-2022, 05:45 PM
Replies: 96
Views: 60,471
Posted By R_J
Re: Samsung SyncMaster 2493HM black screen with power

If it acts up again, try replacing CM806 (10f/50v) Also CB806 and CP811 (47f/50v), these caps are on the ic's VCC line and fail often.
Forum: Troubleshooting Computer Displays 08-03-2022, 05:31 PM
Replies: 64
Views: 24,739
Posted By R_J
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: 151
Posted By R_J
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: 151
Posted By R_J
Re: Klipsch RSW-12 subwoofer won't power on

Yes there is a Monitor Audio schematic, do a Search with the model number and see if it is the same as yours
Forum: Troubleshooting Computer Displays 07-31-2022, 10:05 PM
Replies: 3
Views: 171
Posted By R_J
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: 243
Posted By R_J
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: 243
Posted By R_J
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: 104
Posted By R_J
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: 482
Posted By R_J
Re: Samsung UN55ES7003 has blown fuse on TCON and short to ground.

The D (cDxx) is likely just that area of the circuit, just like the other side of the board has C (cCxx) and rCxx qCx etc.
The bd200 is just a ferrite Bead (it will check as a short)
CD52 and CD53...
Forum: Troubleshooting TVs and Video Sources 07-27-2022, 08:50 PM
Replies: 5
Views: 696
Posted By R_J
Forum: General Electronics Technical Discussion 07-26-2022, 02:16 PM
Replies: 9
Views: 190
Posted By R_J
Re: JCD 8898 zener diode ratings

The blue ring only states it is a zener diode, but does not give a value.
I could not find a schematic, so you may need to trace out the circuit to try and figure out what the zener does in the...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-26-2022, 12:33 PM
Replies: 3
Views: 184
Posted By R_J
Re: Identify ic from MA10 REV 2.2

How many pins? picture is too small to tell, (135x180 thumbnail)
Forum: Troubleshooting TVs and Video Sources 07-23-2022, 09:12 PM
Replies: 3
Views: 211
Posted By R_J
Re: Samsung LCD TV Power Supply Troubleshooting (Please Help)

Actually it is a LCD tv with LED backlight, and I suspect you have a bad led in in one of the backlight strings causing the problem, it only takes one bad led to cause the backlight circuit to detect...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-23-2022, 06:08 PM
Replies: 6
Views: 463
Posted By R_J
Re: Maxxair 4500K RV roof fan only works on intake, does not exhaust

Does the fan work on intake? if it does, can you vary the speed? If used, does the lift motor operate and open the vent cover? or is this just manual cover opening? Have you checked the (poly) fuse...
Showing results 1 to 25 of 500

 
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