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Search: Posts Made By: R_J
Forum: General Capacitor Questions & Issues Yesterday, 09:25 PM
Replies: 4
Views: 56
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: 858
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: 127
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: 60,409
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: 24,702
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: 127
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: 127
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: 162
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: 229
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: 229
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: 101
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: 468
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: 686
Posted By R_J
Forum: General Electronics Technical Discussion 07-26-2022, 02:16 PM
Replies: 9
Views: 182
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: 182
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: 206
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: 451
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...
Forum: Troubleshooting Audio Equipment 07-23-2022, 05:39 PM
Replies: 30
Views: 10,170
Posted By R_J
Re: MACKIE PPM608 repair

There should be 6 screws (3 on each side) holding the front panel to the case.
Forum: Troubleshooting Audio Equipment 07-21-2022, 09:21 PM
Replies: 3
Views: 175
Posted By R_J
Re: Apogee SA400 Amplifier Service Manual

Here is the DA series, maybe it is close?
Forum: General Electronics Technical Discussion 07-20-2022, 04:13 PM
Replies: 25
Views: 348
Posted By R_J
Re: Queen coffee CQ MN-2 Heating element

I was too slow posting, like rewire said...
It may be sticking do to calcium buildup, or something is warped due to heat. Also check the force it takes to press the micro switch just in case it's...
Forum: General Electronics Technical Discussion 07-20-2022, 10:42 AM
Replies: 25
Views: 348
Posted By R_J
Re: Queen coffee CQ MN-2 Heating element

Even if the boiler element was open, the Brew light (S3) should still light, If both thermal cutouts B5 and B4, mounted on the boiler are ok, and not open, I suspect B3 micro switch is either bad or...
Forum: General Electronics Technical Discussion 07-20-2022, 08:12 AM
Replies: 25
Views: 348
Posted By R_J
Re: Queen coffee CQ MN-2 Heating element

There are two separate warming plates, do either of them work? There are also three lights, do any of them work? If none of the lights work and neither of the warming plates get warm, I suspect the...
Forum: General Electronics Technical Discussion 07-20-2022, 07:41 AM
Replies: 2
Views: 117
Posted By R_J
Forum: General Electronics Technical Discussion 07-20-2022, 06:58 AM
Replies: 25
Views: 348
Posted By R_J
Re: Queen coffee CQ MN-2 Heating element

Here is the boiler, check the resistance of the element, The thermal cutouts should read 0Ω.
What is the problem you are having with the machine?
Forum: Troubleshooting TVs and Video Sources 07-19-2022, 07:46 PM
Replies: 4
Views: 264
Posted By R_J
Re: Samsung 55NU6900 - Heard a pop then tv is dead, burnt cap & dead fuse

This looks like it is the PFC circuit. It might be that the cap shorted on its own, maybe the voltage rating was just border line, (1kv instead of 2kv), Remove the shorted cap, then check the two...
Showing results 1 to 25 of 500

 
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