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


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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