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Search: Posts Made By: R_J
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Today, 05:58 PM
Replies: 1
Views: 17
Posted By R_J
Re: Id 5v=7b l1t

Richtek RT3612EB
Forum: Troubleshooting Audio Equipment Today, 05:38 PM
Replies: 8
Views: 94
Posted By R_J
Re: Pioneer turntable tone arm adjustment

That looks like an allen key for the adjustment. and it likely did not go out of adjustment. I suspect the tone arm got pushed toward the center spindle and the small screw (under the tone arm...
Forum: General Electronics Technical Discussion Today, 04:52 PM
Replies: 16
Views: 159
Posted By R_J
Re: ID help with SMD, Please?

I would guess something else is bad, like the chip. In post #10, the coils ferrite is cracked, but I can't see that being the problem, likely the internal buck converters that the coils are part of,...
Forum: General Electronics Technical Discussion Today, 04:21 PM
Replies: 16
Views: 159
Posted By R_J
Re: ID help with SMD, Please?

I never said the pinouts matched, I just ment it could be like one of the other TI type boost/buck converter ic's. The SN9B019 seems to have 3 outputs but on this board only 2 are used.
I was not...
Forum: General Electronics Technical Discussion Today, 03:38 PM
Replies: 16
Views: 159
Posted By R_J
Re: ID help with SMD, Please?

I suspect this is the main power management ic, "similar" to a TPS6521815 or maybe like a TPS65072
"similar" as in NOT THE SAME, different pinouts etc.
Forum: Troubleshooting Audio Equipment Today, 01:31 PM
Replies: 8
Views: 94
Posted By R_J
Re: Pioneer turntable tone arm adjustment

move the tonearm to the position where it would normally auto return (near center of record) and see if there is a Philips head screw in the location I marked.
The shaft from the tonearm goes into...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices Yesterday, 05:49 PM
Replies: 46
Views: 12,646
Posted By R_J
Re: Richtek marking code

No one is here. Richtek RT8813D
Forum: Troubleshooting Appliances and other Household Electronic Stuff Yesterday, 05:18 PM
Replies: 3
Views: 83
Posted By R_J
Re: AEG U3100-4-M Oven - RCD trips after heating up

If that doesn't fix it, it is likely the internal heat element wire shorting to the elements ground when it heats up
Forum: Troubleshooting Audio Equipment Yesterday, 05:06 PM
Replies: 8
Views: 94
Posted By R_J
Re: Pioneer turntable tone arm adjustment

Does the tonearm land properly at the start of a record? or is that off as well? There is another adjustment besides the height adjustment
Forum: Troubleshooting Power Supplies and Power Supply Design 08-17-2022, 11:00 AM
Replies: 3
Views: 109
Posted By R_J
Re: pwm controller IC unknown component

The one is a MIC2299-15YML-TR
Forum: General Electronics Technical Discussion 08-15-2022, 04:02 PM
Replies: 24
Views: 411
Posted By R_J
Re: Old analog Power Supply needs your advice

Those are axial lead electrolytic's, the values will be marked on them, I can't make quite make it out, looks like 25v.
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 08-15-2022, 01:00 PM
Replies: 5
Views: 112
Posted By R_J
Forum: General Electronics Technical Discussion 08-14-2022, 11:21 AM
Replies: 32
Views: 474
Posted By R_J
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: 32
Views: 474
Posted By R_J
Re: Help me with capacitors replacement

The one with the shorter leads is 6 amp 600v
Forum: General Electronics Technical Discussion 08-13-2022, 08:50 PM
Replies: 32
Views: 474
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 08-13-2022, 06:19 PM
Replies: 32
Views: 474
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: 32
Views: 474
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: 259
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: 408
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: 408
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: 408
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: 408
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: 408
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: 960
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: 176
Posted By R_J
Re: Klipsch RSW-12 subwoofer won't power on

Here is the RSW-15 service manual
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