[TechAssist] Re: Curtis Mathis CM27101S burt resistors
- From: "Advanced Electronics" <satguy@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 9 Oct 2003 13:19:34 -0600
Hello, I replaced R812 and R828, repaired the burned spots and also replaced
C826 (25 volt 2200 uf) which was poofed out on the top and bad. Set played
for about 2 hours and smoked C826 again and R828 is open again. Does anyone
know where to get the schematic for this tv or maybe what I am missing in
this circut that is causing the cap to smoke.
Shaun
Advanced Electronics
224 West Riverview Ave.
Fort Morgan, CO 80701
satguy@xxxxxxxxxxxxx
----- Original Message -----
From: <tvservice@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, October 06, 2003 3:35 PM
Subject: [TechAssist] Re: Curtis Mathis CM27101S burt resistors
> Schematic is difficult to read very small print R812 (not listed in parts
> list)
> appears to be 300 or 500 ohm 1 watt across Q805 C-E
> R828 is 560 ohm 1/4 watt at base of Q805
> D822 at base of Q805 is 5.6volt zener
> hth
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
> Dallas, TX
> ----- Original Message -----
> From: "Advanced Electronics" <satguy@xxxxxxxxxxxxx>
> To: "tec" <techassist@xxxxxxxxxxxxx>
> Sent: Monday, October 06, 2003 12:25 PM
> Subject: [TechAssist] Re: Curtis Mathis CM27101S burt resistors
>
>
> > The chassis looks like a Daewoo but might not be. I am familiar with the
> > common problems with Daewoo tv's and this one is different. The
resistors
> > that are burned are R812 and R828.They both go to a transistor Q805
> > (2SC3205).
> > Shaun
> >
> > Advanced Electronics
> > 224 West Riverview Ave.
> > Fort Morgan, CO 80701
> >
> > satguy@xxxxxxxxxxxxx
> > ----- Original Message -----
> > From: "Satguy" <satguy@xxxxxxxxxxxxx>
> > To: <satguy@xxxxxxxxxxxxx>
> > Sent: Monday, October 06, 2003 11:12 AM
> > Subject: Fw: [TechAssist] Re: Curtis Mathis CM27101S burt resistors
> >
> >
> > >
> > > Shaun
> > > Advanced Electronics
> > > Fort Morgan, CO 80701
> > >
> > > satguy@xxxxxxxxxxxxx
> > > ----- Original Message -----
> > > From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Monday, October 06, 2003 7:09 AM
> > > Subject: [TechAssist] Re: Curtis Mathis CM27101S burt resistors
> > >
> > >
> > > > See if any of these might help:
> > > > ---------------------------------------------------------------
> > > > Text pasted from WinSTIPS 2.0
> > > > http://www.ServiceSoftware.com
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > Dead
> > > >
> > > >
> > > >
> > > > The Service Bulletin Notes For The Regulator Circuit Said To Check
The
> > > > Following Out Of Circuit: R818 (.33 Ohm 1w), R806 (390k 1/2w), R812
> (100
> > > Ohm
> > > > 1/4w).
> > > >
> > > > Failure On These Are Highly Possible Due To Thermal Runaway. Then
> Test
> > > > Q805, Q803 And Q804. To Test You Might Remove Q402 (Hot), And Use A
> > > > 25w-120v Bulb Across The 103vdc And See If It Flashes.
> > > >
> > > > Replace C404 1mf-160v With A 3.3mf-160v No Matter What, And Place A
33
> > Ohm
> > > > 1/4w On Q402 Between Base To Emitter. In My Fix I Had To Replace
> Q402,
> > > And
> > > > Then Added The Resistor.
> > > >
> > > > The Notes I Have For Crossing These Are:
> > > > Q402 - D1880 - Nte 2353 (Hot)
> > > > Q803 - C2500 - Nte 2363
> > > > Q804 - E13009-2 - Nte 379
> > > > Q805 - C3203 - Nte 382
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > Dead - H.o.t. shorted & Fuse blown
> > > >
> > > > Herman Ackerman
> > > >
> > > > Q804E13009-2 (Kse13009y) I used 2sc4834, Q805 Ktc3203 used 2sc3203
> > h.o.t.
> > > > 2sd1880 used 2sd1879 ok.
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > Dead - H.o.t. shorted & Fuse blown
> > > >
> > > > Jesse Morris
> > > >
> > > > Q402, Q804, Q805, C403, C418, and F801
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > Dead No Power Up
> > > >
> > > > Computer & Comm Solutions Www.Ccsinc.Com 804-642-9731
> > > >
> > > > Q803 C2500 R/W Sk9453, Q804 E13009 R/W Sk10000, Q402 2sd1880 R/W
> > 2sd1879,
> > > > Q805 C3203 R/W C3203 C404 1uf@160v Had Bad Esr
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > Dead No Power Up (All Smps Components Check Good !)
> > > >
> > > > Bay Electronics Inc.
> > > >
> > > > Remove R807 (47 Ohm) Scrape Leads Reinstall Or Replace R807 The Unit
I
> > > Fixed
> > > > Had An Invisible Bad Joint There Due To Overheating.. What A Dog !
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > Dead.
> > > >
> > > > Ford's Tv & Video Service
> > > >
> > > > Open Capactor, C404 (1 Uf 160v), Shorted Transistor, Q803(2sc3203),
> > > > Defective Transitors, Q805 (2sc2500), Q804 (E13009-2), Q402
(2sd1880),
> > > Open
> > > > Resistor, R815 (0.33 Ohm 1 W).
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > Dead.
> > > >
> > > > Ford'S Tv & Video Service
> > > >
> > > > Open Cap, C404 (1uf 160v), Shorted Transistor, Q803(Ksc2500),
> Defective
> > > > Transistors, Q805(Ktc3203), Q804(Kse13009), Q402 (2sd1880), Open
> > Resistor,
> > > > R818 (0.33 Ohm 1 W)
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > H.o.t. overheating
> > > >
> > > > Daewoo Fsb 99ctv2
> > > >
> > > > add a 33 ohm resistor from b-e of h.o.t.
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > H.O.T. Overheating
> > > >
> > > >
> > > >
> > > > Here Is The List Of Things That Daewoo Told Me To Replace Or Test
When
> > > There
> > > > Is Thermal Runaway In Horz Out. They Say That This Is Good For
> Shutdown
> > > > After It Has Been On For Awhile.
> > > >
> > > > Original Replace
> > > > Q402- 2sd1880 2sd2539>
> > > > Q803- Ksc2509b 2sc2355 Or Nte2363
> > > > Q804- Kse!#13009 2sc3890 Or Nte379
> > > > Q805- Ktc3203 2sc2235 Or Nte2382
> > > > Replace : C808, C404 , C410 , C414 , C413
> > > > Check : C412 , C401 Replace If Necessary.
> > > > Change C505 To 1000pf@100v , R420 To 1.8k 1 Watt
> > > > Check Or Replace R516 10k Pot (Which Will Cause Pic To Narrow On
> > Right)
> > > >
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > Pix Shifted, leaving black bar on Left side
> > > >
> > > > Daewoo Svc Bulletin #99ctv1
> > > >
> > > > Trimpot R516 (10k) open and D504 open due to excessive current
flow.
> > R420
> > > > 240 ohm 1w r/w 1.8k-1w,C505 2200pf/50v r/w 1000pf/50v D504 1n4148.
> > > > Decakit011 contains all 4 parts
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > Q402 (h.o.t.) thermal runaway
> > > >
> > > > Add 33 ohm 1/4w resistor across Q402 Base to emitter
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > DAEWOO DTQ26S1FC
> > > >
> > > > Regulator problems
> > > >
> > > > Robert Ford
> > > >
> > > > check parts out of ckt: R818 .33-1w, R806 390k-1/2w, R812 100-1/4w,
> > > > Q805,Q803,Q804. to test remove Q402 (hot) and put 120v 25w bulb
across
> > the
> > > > 103vdc supply
> > > >
> > > > ---------------------------------------------------------------
> > > >
> > > > Bob Waterman, CET® #RI-28
> > > > Master Technician License #9109
> > > > Service Manager / Parts Manager
> > > > Gemini Computer, TV, & Security Alarms
> > > > (508)695-7302
> > > > (508)695-7769 FAX
> > > > geminitv@xxxxxxxxxxxxxxxx
> > > > geminitv@xxxxxxx
> > > > www.geminicomputertvsecurityalarms.com
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Advanced Electronics" <satguy@xxxxxxxxxxxxx>
> > > > To: "tec" <techassist@xxxxxxxxxxxxx>
> > > > Sent: Friday, October 03, 2003 6:29 PM
> > > > Subject: [TechAssist] Curtis Mathis CM27101S burt resistors
> > > >
> > > >
> > > > > I have this Curtis Mathis tv that has an RCA picture tube and what
> > looks
> > > > > like a Daweo Chassis the only numbers on the chassis are s/n
> > > 4859812791-03
> > > > > and on a sticker on the chassis is MPGT18E528-1DTQ-29S3FC. What I
> need
> > > to
> > > > > start with is the values of R812 and R828.
> > > > >
> > > > > Shaun
> > > > >
> > > > > Advanced Electronics
> > > > > 224 West Riverview Ave.
> > > > > Fort Morgan, CO 80701
> > > > >
> > > > > satguy@xxxxxxxxxxxxx
> > > > >
> > > > >
> > > >
> > >
> >
>
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