[TechAssist] Re: FIXED - Daewoo DTQ-29S1FCN, Chassis CN2001


Did you have to replace D401 also?

Paul Troy
Troys Electronic Repair
Box 92, St. Anthony, NFLD. 
P  (709) 454-2683
F  (709) 454-2596
troy.paul@xxxxxxxxxxxxxxx

Premium Technologies wrote:
> 
> Problem:  Dead, main fuse blown.  Customer complained that for a long time
> unit would shut down, and after awhile it could be turned on and run again
> for a random period of time.
> 
> Notes:  Several service bulletins outlining a number of modifications exist
> for this unit.  Service notes cover horizontal shift, channel missing or
> shipped, Thermal runaway and notes regarding repair of regulator circuit.
> 
> FIX:  Testing found a number of defects and the following were replaced,
> Q805 (C3203/crossed with NTE382),  HOT Q402 (D1880/crossed with NTE 2353),
> C404 (1mf-160v replaced with 3.3mf 160v per service bulletin)  In addition,
> a 33 ohm 1/4w resistor was added to HOT Q402, Base to Emmitter per service
> bulletin.
> 
> Unit has been running flawlessly now for approximately three hours.  Heat on
> Q402 appears nominal.
> 
> Hope this helps.
> Bill
> 
> Premium Technologies
> Ocean Park, WA. 98640
> Phone: (360) 665-5984
> Fax:     (605) 253-4530
> email: premtech@xxxxxxxxxxxxxx
> 
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