SIMPLE PCB REPAIR TIPS

[LJDomestics]

Re: SIMPLE PCB REPAIR TIPS

Penguin45 wrote:

just done a repair to exact same board as chris has posted here, FAULT = NO HEAT ( d3 ) locate and change the little resistor that says IN4007 24C

[Martin]

Re: SIMPLE PCB REPAIR TIPS

Bosch front loaders and top loaders can often appear dead (i.e Display dead + LED’s not working). Many go straight to the interlock thinking that is the problem but often that is not the case. Take a real close look at the PCB/Control Module and often as not the main power relay terminal has burnt and simply needs re-soldering the dry joint. (as in the illustration below- a little fuzzy in this crap photo but you get the point nonetheless. 😉

Edited to include attachment.

Don

[Allsorts]

Re: SIMPLE PCB REPAIR TIPS

This one is from User: Simon, on another thread

Whirlpool awod4505 dead

r020 on pcb. 0.5w 22 ohms

[Phidom]

Re: SIMPLE PCB REPAIR TIPS

Servis M6500W-1 uses PCB Elmarc Mini QCP_E DC, part No. 546089203 Machine was pumping on all settings including “Stop”. EMW don’t repair this board so I had a go. Traced fault to short circuit triac, BTB04-600SL at top edge of board next to the main multi pin sockets. New triac (58p from Farnell) cured fault. 😀

[Allsorts]

Re: SIMPLE PCB REPAIR TIPS

Item Description: Indesit Relay PCB

Item Part numbers: 1702778, 1703290, C00112205, C00207999

Make & Model affected: Hotpoint VTD, Indesit IS60, Proline TDV & SLE

Symptom: Start button depressed allows the machine to work but when released the machine stops because the Relay PCB is not operating. This is also evident by watching the connection side of the switch where a spark will be seen when the Start button is released.

Repair: Replace D2 (1N4749A) and C1 (47mf 50v 85degs)

😛

[lasty]

Re: HOTPOINT WMA interlock chip / board fault

——————————————————————————–
HOTPOINT WMA – symtoms :- interlock fails to lock , light flashing .
If the door switch is fine and you suspect a board problem – Easy enough to sort if the damage is visible .

There is a 3mm x 2mm chip on the bottom left hand side easily distinguished by three prongs out the top and a single square plate attatchment at the bottom all soldered . check the chip for blown surface damage and of course track damage . Repair track damage and change the chip with one off a scrap board …….
usually sorts things out .

[loopey]

Re: SIMPLE PCB REPAIR TIPS

electrofix wrote:quite a few dishwashers use a 1uf or 1.5uf capacitor as a power supply for the pcb
when these go it is like having a low battery

fault you expect dishwasher turns on set prog
prog starts and dishwasher fills as soon as main motors switches on it all goes pear shaped (ie not enough power to hold in motor relay )

similar problem on the old hoover tumble dryers small pcb that start td
replace small cap (think its .22uf from memory) board repaired repair cost less than 50p

can supply part suppier info if reqd

Dave

all good dave have the same looking probs with lux aeg zan frost free f/f
and most hotpoint single board f/f

this below is the hotpoint indeshit boards 1uf or 1.5uf appears to be on wont run the compressor change it all is well

the same with the lux zan boards

And the bosch conversion , fridge warm freezer ok cuts out the the fridge thermister , will post the 3 wire when i see one ? 🙂

[loopey]

Re: SIMPLE PCB REPAIR TIPS

Hi , Martin how do you do the red arrow and text on pics , i like it lol beets my marker pen lol

[garn]

Re: SIMPLE PCB REPAIR TIPS

Hotpoint Indesit Board Faults
Symptoms

Continues Pumping Out 😕
Continues Filling 😕
machine Doesn’t Start up Dead 😕
cant Select Diagnostics. 😕

You may Find After Checking The taps. ntc. Pressure Switch. motor Windings. Door Lock.
You May Find After Checking All That Its Still Knackered :rolls: .
These Days i go Strait On To The Board With The best Cure You can Find.
A Sowing Needle

Carefully Lift Those Connections up With The Needle.

Warning if You Raise Them up To far The Connection Will bend As You Fit The block onto The Board When This happens Your Original Fault May be Mended 🙂 And You may Find Another Extra Fault One of The Above 😥 .

have Some Patients 😡 And Start Again
Lately I have had A lot of Success on A mend With Theses Symptoms
All Indersits HPT. Wml . Wt .And So on The Appliances Are All About 2to3 Years Old. Must be Down To All That Rattling About.

Garn…

[RocketMan]

Re: SIMPLE PCB REPAIR TIPS

AEG/Lux SK88800i/PNC 923521608

Fault: When the fridge door is opened, the light swithces on/off and a relay clicking sound is heard. Also, if trying to change a setting it also appears to have the same affect.

Probably relevant to other simlar models.

Faulty component was the 1uF power capcitor.
Before

After

Thanks and full credit to electrofix as detailed in this thread here

…wow both my pictures and hyperlink worked for a change.. 😀

[shaun67]

Re: SIMPLE PCB REPAIR TIPS

Just like to add that some capacitors do not show signs of faults but will go high in ESR .. this little meter will confirm it and is really accurate..Many people miss that a cap is bad as they look for the dorm shape which is not always evident.

http://www.prc68.com/I/ESRmicro.shtml

[neilsukwg]

Re: SIMPLE PCB REPAIR TIPS

shaun67 wrote:Just like to add that some capacitors do not show signs of faults but will go high in ESR .. this little meter will confirm it and is really accurate..Many people miss that a cap is bad as they look for the dorm shape which is not always evident.

http://www.prc68.com/I/ESRmicro.shtml

Does this meter allow you to test a capacitor while still in circuit?

if so could you tell me where to get hold of one

Neil

[leavemetogetonwithit]

Re: SIMPLE PCB REPAIR TIPS

“It’s primary use is to test capacitors for series resistance while they are installed on printed circuit boards”
That’s what it says just under the picture.
At the bottom of the page it gives a link to purchase. $80 to UK. 😐
Mike.

[shaun67]

Re: SIMPLE PCB REPAIR TIPS

neilsukwg wrote:

shaun67 wrote:
Just like to add that some capacitors do not show signs of faults but will go high in ESR .. this little meter will confirm it and is really accurate..Many people miss that a cap is bad as they look for the dorm shape which is not always evident.

http://www.prc68.com/I/ESRmicro.shtml

Does this meter allow you to test a capacitor while still in circuit?

if so could you tell me where to get hold of one

Neil Hi Neil sorry i was late replying , this meter is best used when just un soldering one leg of a capacitor because other circuits can cause a false reading ( some meters advertise that they work without un soldering one leg , but this is not the case because of back circuits interfering with the readings).. I bought one from Mike and it is really good at detecting these faults on capacitors …It will display the actually capacitance and the series resistance ..

it’s actually the series resistance that is the really important bit because if this is really high then the cap can look good and even test good with a digital multimeter that can check capacitance but will actually be faulty..This meter tells you that and has a reference chart what is a good capacitor..

Many people test using just a capacitance meter and it passes even though it’s bad..

A good place to read about these issues is a site called badcaps.net hope i was ok posting the name if not i apologize and please kindly remove.

If you like to solder and check boards then this little meter is the business , Mike ships pretty quick and best to email him and he’ll respond to you.

This meter will pay for it’s self if you like to test components ..capacitors are a real issue in most electric equipment where they are installed..Fixed quite a few power supply’s in desktop pcs and monitors as well as the odd tv , without it i would not have known they were bad apart from a couple that had gone dome shaped.

Sorry to waffle on but had to say it lol..

By the way i have no affiliation to this product ,it’s just that i own one and several other little handy gadgets. (i still mend the odd pc and monitor 🙂

Hope i have answered your question.

Best

Shaun

[admin]

Re: SIMPLE PCB REPAIR TIPS

LJDomestics wrote:just done a repair to exact same board as chris has posted here, FAULT = NO HEAT ( d3 ) locate and change the little resistor that says IN4007 24C

1N4007 it’s a diode not resistor…

neilsukwg wrote:Does this meter allow you to test a capacitor while still in circuit?
Neil

It’s cheaper to unsolder at least one leg of capacitor for measurement instead of buying expensive tool… before measurement make sure to discharge capacitor and do not replace him if is inside tolerance of 10{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} of his value (isn’t necessary)… This is applying to unpolarized capacitor like those from above photos and not to those electolitics (polarized) which have to be changed if are not keeping voltage…

[Author]

Posts