[TechAssist] Re: Help: Follow up: Sony Proj. KP-43T90 Chassis RA-3B. No video, sound ok, OSD / menu is bowed, mis-converged.
- From: Eric Manuel <tvman@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 10 Dec 2005 18:27:15 -0330
David I can send you a schematic for KP43T75--RA-3A chassis it,s 9.7
megs can you recieve it..Eric
Eric
E M Electronics
59 Wights Rd
Deer Lake NL
Canada
A8A 2J2
Ph# 709 635 2627
tvman@xxxxxxxxxxxxxxx
Robinson Electronics wrote:
> Still working on this set for a good customer of mine, has been a headache!
> The only voltage fault I can find is the low +5v. on the connector CN202 to
> the "A" board, measured only 3.6v.
> Could not find a test point (TP) on the "G" board to check the main +5v. The
> standby +5v. is good.
> I subbed out a good "A" board from a good know set, still same problem, so
> the problem is localized to the "G" board somewhere.
> Can anyone help with this? Or any tips on what to check?
>
> So far changed:
> Both conv. IC's., all the pico fuses were ok, though (must not have been bad
> though).
> Flyback xfmr. and h.o.t.
> Resoldered serveral connections on def. circuit, but didn't look to bad.
> Thanks for any help. David.
>
>
> Robinson Electronics
> 1075 Sweeten Creek Road #51
> Asheville, NC 28803-1757
> Ph./Fax. 828 274-3787
> Toll Free. 1-888 ROBELECT
> www.robinsonelectronics.com
> www.robelect.com
> Mailto: RobinsonElectronics@xxxxxxxxxxx
>
> ----- Original Message -----
> From: "Robinson Electronics" <RobinsonElectronics@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, November 27, 2005 9:44 PM
> Subject: Follow up: Sony Proj. KP-43T90 Chassis RA-3B. No video, sound ok,
> OSD / menu is bowed, mis-converged.
>
>
>
>>Anyone have any tips or notes on this chassis, working with out a
>
> schematic?
>
>>These voltage test points G board check good:
>>TP 19v. (ok)
>>TP +15v. (ok)
>>TP -15v. (ok)
>>TP 11v. (ok)
>>TP -12v. (ok)
>>TP stby 5v. (ok)
>>TP 200v. (ok)
>>TP 135v. (ok)
>>On G board connector CN202 to A board CN501
>>the -5v. (ok)
>>but the +5v. measures only 3.6v!
>>With clip CN202 lifted +5v. measures 4.3
>>Going to check the 9v. supplies on the A board tomorrow.
>>Maybe someone has ran into this before, or can help?
>>
>>Robinson Electronics
>>1075 Sweeten Creek Road #51
>>Asheville, NC 28803-1757
>>Ph./Fax. 828 274-3787
>>Toll Free. 1-888 ROBELECT
>>www.robinsonelectronics.com
>>www.robelect.com
>>Mailto: RobinsonElectronics@xxxxxxxxxxx
>>
>>----- Original Message -----
>>From: "Robinson Electronics" <RobinsonElectronics@xxxxxxxxxxx>
>>To: <techassist@xxxxxxxxxxxxx>
>>Sent: Monday, November 21, 2005 7:32 PM
>>Subject: Sony Proj. KP-43T90 Chassis RA-3B. No video, sound ok, OSD is
>>bowed, mis-converged.
>>
>>
>>
>>>Can one of you Sony Techs help us out with this set?
>>>Set powers on with a blink code of 6 blinks, then led stays on but no
>>
>>video
>>
>>>at all, sound is ok though., and the OSD comes on but is bowed and not
>>>converged. I changed both of the convergece ic's anyway (not the problem
>>>though).
>>>Has anyone encountered this, that can help us, or offer some possible
>>>problem areas?
>>>Thanks. David.
>>>
>>>Robinson Electronics
>>>1075 Sweeten Creek Road #51
>>>Asheville, NC 28803-1757
>>>Ph./Fax. 828 274-3787
>>>Toll Free. 1-888 ROBELECT
>>>www.robinsonelectronics.com
>>>www.robelect.com
>>>Mailto: RobinsonElectronics@xxxxxxxxxxx
>>>
>>
>
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