Hitachi 32LD6600B strange picture

[bflare]

Hi all, i have the above TV with a strange picture problem. The sound is working but thats all. I cant see any menu at all. I have unplugged the LVDS cable & cleaned it but no difference. Could it be the main board?? I have noticed what i think is a bulging cap on the psu board not sure if this would cause it??

Any help would be appreciated.

Thanks,

Tony.

[philliesfan30m]

Re: Hitachi 32LD6600B strange picture

the first thing someone is gonna ask is for you to take good pics of the whole tv with the back off and then pics of each of the boards so they can see what you see to help you diagnose the problem.

[bflare]

Re: Hitachi 32LD6600B strange picture

the first thing someone is gonna ask is for you to take good pics of the whole tv with the back off and then pics of each of the boards so they can see what you see to help you diagnose the problem.

Ok......I will do that this evening.

Thanks.

[bflare]

Re: Hitachi 32LD6600B strange picture (with pics)

Hello, i have now attached pictures of the TV with the back off.

Any assistance would be appreciated

Thanks,

Tony.

[tom66]

Re: Hitachi 32LD6600B strange picture

Oh god! It's a Vestel. Kill it with FIRE.
Yes, that cap can easily cause a fault like that, these Vestels are well known for blowing their caps on the power supply.
You can check the output voltages on the power supply to see if they are low, there are 33V, 24V, 12V, 5V and 3.3V.

[bflare]

Re: Hitachi 32LD6600B strange picture

Oh god! It's a Vestel. Kill it with FIRE.
Yes, that cap can easily cause a fault like that, these Vestels are well known for blowing their caps on the power supply.
You can check the output voltages on the power supply to see if they are low, there are 33V, 24V, 12V, 5V and 3.3V.

Oh no lol.........check the voltage how do i do that??? I have a multimeter which is a start i suppose!!!

[tom66]

Re: Hitachi 32LD6600B strange picture

Well Vestel rebadge TVs... so this is a Bush or Alba but sold at a premium by Argos who have licensed the Hitachi badge to poor people who think they are getting a quality build TV.

Meter in DC200V range for 33V, 24V voltages, DC20V for the rest.
Black probe on chassis - wall mount bracket holes help.
Red probe on each wire going out of the connections from the PSU - there is a small bit of metal around the wire - probe there.

You do not need to know which pin is which - just note down voltages on each pin of each connector.

[bflare]

Re: Hitachi 32LD6600B strange picture

Well Vestel rebadge TVs... so this is a Bush or Alba but sold at a premium by Argos who have licensed the Hitachi badge to poor people who think they are getting a quality build TV.

Meter in DC200V range for 33V, 24V voltages, DC20V for the rest.
Black probe on chassis - wall mount bracket holes help.
Red probe on each wire going out of the connections from the PSU - there is a small bit of metal around the wire - probe there.

You do not need to know which pin is which - just note down voltages on each pin of each connector.

Right ok, i have got the back off powered it up with the black probe on the chassis. When you say red probe on the connections from the PSU i assume you mean the connector blocks??? There are five as i have circled red in the pic. Do i probe each red wire on the connector blocks as there are more than one on some of the blocks?

Excuse my lack of knowledge.

[tom66]

Re: Hitachi 32LD6600B strange picture

Yep just probe each - the probe needs to touch the metal sheath around the pin to get a reading.

[bflare]

Re: Hitachi 32LD6600B strange picture

ok. I will do that now.

[bflare]

Re: Hitachi 32LD6600B strange picture

Yep just probe each - the probe needs to touch the metal sheath around the pin to get a reading.

Right i have noted them down on the attached pic. One i am not getting a reading from at all!!!!

[tom66]

Re: Hitachi 32LD6600B strange picture

Sorry, misunderstanding, what I intended was a voltage from each of the pins. For example that left connector might be 24.0, 24.0, 24.0, 24.0, 0.0, 0.0, 0.0, 0.0, 3.0, 2.5, 0.0.

[bflare]

Re: Hitachi 32LD6600B strange picture

Sorry, misunderstanding, what I intended was a voltage from each of the pins. For example that left connector might be 24.0, 24.0, 24.0, 24.0, 0.0, 0.0, 0.0, 0.0, 3.0, 2.5, 0.0.

Right ok im on it.

[bflare]

Re: Hitachi 32LD6600B strange picture

Sorry, misunderstanding, what I intended was a voltage from each of the pins. For example that left connector might be 24.0, 24.0, 24.0, 24.0, 0.0, 0.0, 0.0, 0.0, 3.0, 2.5, 0.0.

Bottom left - 24.4,24.4,24.4,24.4,24.4,0,0.0,0,3.4,1.1,3.3

Top left - 24.4,24.4,24.4,24.4,24.4,0,0,0,0,0

Second from left - 3,1.1,4,0,3.3,0,34.9,11.9,0,0

Third from left - 4.9,4.9,3.3,3.3,3.3,3.3,3.3,0,0,0,0,0

Far Right - 0,0,0,3.5,3.5,5,5

[tom66]

Re: Hitachi 32LD6600B strange picture

Looks like your voltages are good. I'd replace the capacitor, but I think the fault is with the main board.

[bflare]

Re: Hitachi 32LD6600B strange picture

Looks like your voltages are good. I'd replace the capacitor, but I think the fault is with the main board.

Okie dokie, thanks for you help.

[truep]

Re: Hitachi 32LD6600B strange picture

I would change all the caps below the //////// line, cold side. I see at least 2 that appear bad. Replace with panasonic FM or FC series caps. High ripple can cause this problem.

[bflare]

Re: Hitachi 32LD6600B strange picture

I would change all the caps below the //////// line, cold side. I see at least 2 that appear bad. Replace with panasonic FM or FC series caps. High ripple can cause this problem.

Sorry but what does cold side mean??? Do mean all the caps in the area i have marked with red attached??

I have circled a cap in green that i was planning on changing but now i look at the ones circled blue they also look bad.

Do you agree??


Thanks,

Tony.

[attainteddragon]

Re: Hitachi 32LD6600B strange picture

the ones you have circled are the secondary side (cold side). everything beyond the shaded line is the secondary!

[freakaftr8]

Re: Hitachi 32LD6600B strange picture

Yes when in doubt change them out. Secondary side (cold) is where the power supply takes one main voltage and converts to many output stage voltages.