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Search: Posts Made By: jimbofz
Forum: Troubleshooting TVs and Video Sources 12-01-2021, 07:50 AM
Replies: 10
Views: 240
Posted By jimbofz
Re: removing glued s/mount chips lg lb series

thanks thats good advice
i will follow it on next order
Forum: Troubleshooting TVs and Video Sources 12-01-2021, 07:47 AM
Replies: 10
Views: 240
Posted By jimbofz
Re: removing glued s/mount chips lg lb series

ive always tried to remove s/m components with the minimum temp
and then increase temp if the item is stubborn
and use the smallest nozzle on my s station
to prevent other close components...
Forum: Troubleshooting TVs and Video Sources 11-30-2021, 11:30 AM
Replies: 10
Views: 240
Posted By jimbofz
Re: removing glued s/mount chips lg lb series

i must just be unlucky
aliexpress varies so much with del times
and quality of product is sometimes poor
Forum: Troubleshooting TVs and Video Sources 11-30-2021, 11:27 AM
Replies: 10
Views: 240
Posted By jimbofz
Re: removing glued s/mount chips lg lb series

what max temp would you suggest ? i normally use 250 degrees
i had to turn up to max to budge it which is not good for the pcb
Forum: Troubleshooting TVs and Video Sources 11-30-2021, 06:46 AM
Replies: 10
Views: 240
Posted By jimbofz
Re: removing glued s/mount chips lg lb series

thanks at least someone reads my posts
thats a good idea
but when salvaging a chip from a scrap board obvious wont work
so any thaughts on solvent to loosen the bond ?
this repair has caused...
Forum: Troubleshooting TVs and Video Sources 11-29-2021, 08:09 AM
Replies: 10
Views: 240
Posted By jimbofz
removing glued s/mount chips lg lb series

recently struggled to remove BL0202 backlight chip
which had red residue of glue underneath
as well as annoying laquer over the top and surrounding area.
i had to use more heat than i like to...
Forum: Troubleshooting TVs and Video Sources 11-21-2021, 08:28 AM
Replies: 16
Views: 447
Posted By jimbofz
Re: THOMSON 32lb120s4 no sound

i will check as soon as i get my hands on the tv .the owner has taken it back and for the time being is using external audio out phonos from his sat box to his stereo system ,as he only uses scart on...
Forum: Troubleshooting TVs and Video Sources 11-21-2021, 05:37 AM
Replies: 16
Views: 447
Posted By jimbofz
Re: THOMSON 32lb120s4 no sound

the voltage is .05v ,so ill try to get replacement ic thanks
Forum: Troubleshooting TVs and Video Sources 11-21-2021, 05:35 AM
Replies: 16
Views: 447
Posted By jimbofz
Re: THOMSON 32lb120s4 no sound

so that explaines where the 5v comes from .
its not clear from the cct .
i now understand its from within the ic
Forum: Troubleshooting TVs and Video Sources 11-20-2021, 06:27 AM
Replies: 16
Views: 447
Posted By jimbofz
Re: THOMSON 32lb120s4 no sound

finally found cct .page 17 is audio o/p ,
strange theres no 5v supply shown on cct
it seems that the chip works without ?
please have a look
the cct is same even though the model number is 125...
Forum: Troubleshooting TVs and Video Sources 11-19-2021, 02:14 PM
Replies: 16
Views: 447
Posted By jimbofz
Re: THOMSON 32lb120s4 no sound

supplies to chip ok slight buzz left and right on both i/p pins
Forum: Troubleshooting TVs and Video Sources 11-18-2021, 12:56 PM
Replies: 16
Views: 447
Posted By jimbofz
Re: THOMSON 32lb120s4 no sound

had a good look in s/menu
sadly nothing in there to do with sound
Forum: Troubleshooting TVs and Video Sources 11-18-2021, 04:11 AM
Replies: 16
Views: 447
Posted By jimbofz
Re: THOMSON 32lb120s4 no sound

yes mute osg as normal
vol graphic as normal but not a peep of sound ,
headphone socket also eliminated ,
no sound with headphones
Forum: Troubleshooting TVs and Video Sources 11-15-2021, 01:54 PM
Replies: 16
Views: 447
Posted By jimbofz
Re: THOMSON 32lb120s4 no sound

thanks for taking time to help .sadly this version you posted is different to mine the version i have has a TDA7490L for its sound o/p stage ,pin 6 of which is mute/on off .
now when you press mute...
Forum: Troubleshooting TVs and Video Sources 11-11-2021, 07:17 AM
Replies: 16
Views: 447
Posted By jimbofz
THOMSON 32lb120s4 no sound

Hi can anyone help please with cct diagram ,ive looked for hours
this tv has no sound but the o/p stage is fine ,so suspect main board ,poss corrupt f/w?
Forum: Troubleshooting TVs and Video Sources 10-25-2021, 07:38 AM
Replies: 1
Views: 229
Posted By jimbofz
Re: how to reduce backlight volts/current JVC LT-49C550

sorted
i doubled the value of r14 and r9 reducing backlight current by 30% this should stop the leds from being driven flat out
i still have acceptable pic even with menu set at 6 for b/l
shame...
Forum: Troubleshooting TVs and Video Sources 10-22-2021, 12:27 PM
Replies: 1
Views: 229
Posted By jimbofz
how to reduce backlight volts/current JVC LT-49C550

This model had backlight strips replaced 6 months ago and reduced backlight from 10 to 5. You have guesses it, the customer despite my advice turned it back up to 10 so now backlights have failed....
Forum: Troubleshooting Audio Equipment 10-13-2021, 02:43 PM
Replies: 3
Views: 306
Posted By jimbofz
Re: roberts dab mpsound 43 circuit

the sangean ddr 43 , 62 , and 63, look the same product
any ideas for servics manual /cct diagram ?
thanks
Forum: Troubleshooting Audio Equipment 10-12-2021, 12:57 PM
Replies: 3
Views: 306
Posted By jimbofz
Angry Re: roberts dab mpsound 43 circuit

thanks STJ ,been using that info,
mute pin 45 low ok
vreg pin15 4v ok
shutdown pin 44 high ok
vbyp pin16 1.25v ok
avcc supply 10v ok
fault pin 46 low ok
pvccl 10v ok
pvccr ...
Forum: Troubleshooting Audio Equipment 10-12-2021, 09:48 AM
Replies: 3
Views: 306
Posted By jimbofz
roberts dab mpsound 43 circuit

Hi ive searched internet for cct diagram of sound o/p stage using TPA3100D2 ic.no luck

in manufacture they pour hot melt glue over the top to secure the inadequate heatsink .problem is it...
Forum: Troubleshooting TVs and Video Sources 06-01-2021, 07:46 AM
Replies: 10
Views: 753
Posted By jimbofz
Re: philips 32pfl5403d/10 error code help

sorry been busy with other repairs ,
i assume you mean the main board?
which has no heatsink pads that are removable
nor does the t con board?
Forum: Troubleshooting TVs and Video Sources 05-27-2021, 03:03 AM
Replies: 10
Views: 753
Posted By jimbofz
Re: philips 32pfl5403d/10 error code help

thanks again i will update soon
Forum: Troubleshooting TVs and Video Sources 05-26-2021, 09:51 AM
Replies: 10
Views: 753
Posted By jimbofz
Re: philips 32pfl5403d/10 error code help

a BIG thankyou to maalobs
for taking the time to post such detailed information
you have certainly helped to point me in right direction,

i still would like to find where the 12v supply to tcon...
Forum: Troubleshooting TVs and Video Sources 05-25-2021, 03:57 AM
Replies: 10
Views: 753
Posted By jimbofz
Re: philips 32pfl5403d/10 error code help

from philips website i downloaded software update its a "autorun22m.upg "file
extracted and followed instructions ,
sadly fault persists.
im wondering if the update shown above is not a complete...
Forum: Troubleshooting TVs and Video Sources 05-25-2021, 02:04 AM
Replies: 10
Views: 753
Posted By jimbofz
Showing results 1 to 25 of 287

 
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