[TechAssist] Re: 32" RCA CTC187 - Dead Set?
- From: "Dan Garris" <dgarris@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 23 Oct 2004 18:53:47 -0400
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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