[TechAssist] Re: 32" RCA CTC187 - Dead Set? [Thread ended]
- From: "Dan Garris" <dgarris@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 24 Oct 2004 04:43:03 -0400
Thanks Kevin, I quit troubleshooting the set. Had to move on. It was a shop
set anyhow. I stripped the chassis for parts already and have moved on to
another set and have just fixed it. I'll post the fix for it. Thanks to all.
We can end this " 32" RCA CTC187 - Dead Set?" Thread and help some others.
Thanks to all who helped. Had to move on.
Dan Garris
Garris TV
New Bern, NC
>From: Kevin <kevintv@xxxxxxx>
>Reply-To: techassist@xxxxxxxxxxxxx
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Re: 32" RCA CTC187 - Dead Set?
>Date: Sun, 24 Oct 2004 00:33:38 -0700
>
>The voltage to pins 5 and 6 of the eeprom are way too low. Pin 5 goes
>to
>pin 53 of T-chip (U1001) and pin 16 of U3101 (uP). Pin 6 goes to pin 54
>of T-chip and pin 15 of the uP. The next thing to check would be the
>Vcc to both of these chips, but I don't have the entire pin outs for
>each of these IC's.
>
>It sounds like the Vcc is low to the T-chip and/or uP, or either IC is
>bad.
>
>Kevin Wilks
>Kevin's TV & Video Repair
>Penticton BC Canada
>kevintv@xxxxxxx
>
>
>-----Original Message-----
>From: techassist-bounce@xxxxxxxxxxxxx
>[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Dan Garris
>Sent: Saturday, October 23, 2004 3:54 PM
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Re: 32" RCA CTC187 - Dead Set?
>
>CTC187CL3 #U3201 EEprom Voltages are:
>Pins 1-4 = 0 volts
>Pin 5 = 1.3 volts Scope shows good clock signal - voltage still 1.3 w/o
>eeprom installed
>Pin 6 = 1.22 volts Scope shows good clock signal - voltage still 1.22
>w/o
>eeprom installed
>Pin 7 = 0 volts
>Pin 8 = 4.88 volts
>Replaced w/ (3) new eeproms to be sure - got same voltages and results.
>I
>don't think it's the eeprom.
>
>Dan Garris
>Garris TV
>New bern, NC
>
> >From: Kevin <kevintv@xxxxxxx>
> >Reply-To: techassist@xxxxxxxxxxxxx
> >To: techassist@xxxxxxxxxxxxx
> >Subject: [TechAssist] Re: 32" RCA CTC187 - Dead Set?
> >Date: Sat, 23 Oct 2004 15:19:53 -0700
> >
> >Pin 8 is your VCC and should be 5 volts, close enough. Pins 5 and 6
> >should also be 5 volts. Disconnect pins 5 and 6 and see if the
>voltages
> >go up. Measure on the eeprom and the traces feeding the eeprom. It
> >sounds like your eeprom is bad.
> >
> >Kevin Wilks
> >Kevin's TV & Video Repair
> >Penticton BC Canada
> >kevintv@xxxxxxx
> >
> >
> >-----Original Message-----
> >From: techassist-bounce@xxxxxxxxxxxxx
> >[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Dan Garris
> >Sent: Saturday, October 23, 2004 3:08 PM
> >To: techassist@xxxxxxxxxxxxx
> >Subject: [TechAssist] Re: 32" RCA CTC187 - Dead Set?
> >
> >CTC187CL3 #U3201 EEprom Voltages are:
> >
> >Pins 1-4 = 0 volts
> >Pin 5 = 1.3 volts
> >Pin 6 = 1.22 volts
> >Pin 7 = 0 volts
> >Pin 8 = 4.88 volts
> >
> >Dan Garris
> >Garris Radio & TV
> >New Bern, NC
> >
> >
> > >From: Kevin <kevintv@xxxxxxx>
> > >Reply-To: techassist@xxxxxxxxxxxxx
> > >To: techassist@xxxxxxxxxxxxx
> > >Subject: [TechAssist] Re: 32" RCA CTC187 - Dead Set?
> > >Date: Sat, 23 Oct 2004 14:19:57 -0700
> > >
> > >What are the voltages on the eeprom?
> > >
> > >Kevin Wilks
> > >Kevin's TV & Video Repair
> > >Penticton BC Canada
> > >kevintv@xxxxxxx
> > >
> > >
> > >-----Original Message-----
> > >From: techassist-bounce@xxxxxxxxxxxxx
> > >[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Dan Garris
> > >Sent: Saturday, October 23, 2004 1:31 PM
> > >To: techassist@xxxxxxxxxxxxx
> > >Subject: [TechAssist] 32" RCA CTC187 - Dead Set?
> > >
> > >What: 32" RCA TV
> > >Model: F32672SB
> > >Chassis: CTC187CL3
> > >Sams#: 3672
> > >
> > >Dead Set, No blown fuse, No Relay CLick, HOT Shorted.
> > >
> > >Replaced w/ Original Q4401 BUH517 HOT, Replaced U4101 STK730-150
> > >Regulator
> > >IC, Performed TOB repairs and even changed the 223957 eeprom, (using
> > >original eeprom set still dead) Checked several of the common failure
> > >diodes
> > >ok, Resoldered L14101 coil and horiz. driver transformer. The standby
> > >p/s
> > >voltages are all there and ok (These are test points 1-5 on the
>Sams).
> >I
> > >
> > >supplied +12v to the emitter of Q4852 (12v Reg) to get the set to
>fire
> > >up
> > >and it did, ...I turned up the screen control on the flyback and I
>have
> > >a
> > >blank screen with retrace lines, no picture, no OSD, can't even
>access
> > >setup
> > >menu. At least I know the FBT & HV circuits are workable! I am
>getting
> >a
> > >
> > >mental block on this one and looking for some help. Do I have a bad
> > >T-Chip
> > >or has anyone seen this description while troubleshooting a CTC187?
> > >
> > >Dan Garris
> > >Garris Radio & TV
> > >New Bern, NC
> > >dgarris@xxxxxxxxxxx
> > >Ph: (252) 638-4477
> > >
> > >
> > >
> >
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