[TechAssist] Re: CTC203CH3 RCA CHASSIS
- From: Wayne Vanaman <Wayne@xxxxxxxxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 22 Oct 2005 06:24:56 -0500
That is possible, Jim.
Alvin:
Is your serial number greater than 950xxxxxx
Serial number Info:
First digit, year. 9=1999, 1989, 1979
Digit two and thre, the week. 50= middle of December.
Digit four, day of the week, 1=Sun, 2=Mon, etc
The bulletin applies to chassis made before the 50th week of 1999.
---------insert RCA bulletin TV00-003---------------
Product Safety Information
Product Safety information is contained in the appropriate TCE Service
Data covering models/chassis referenced herein. All specified
Product Safety requirements and testing shall be complied with prior to
returning equipment to the customer. Servicers who defeat safety
features or fail to perform safety checks may be liable for any
resulting damages and may expose themselves and others to possible injury.
First Edition ¾ First Printing
Copyright 2000 ¾ Thomson Consumer Electronics, Inc.
Printed in U.S.A. ¾ Trademark(s) ® Registered ¾ Marca(s) Registrada(s)
Symptom: Shutdown during channel change, shutdown during autoprogram,
dead set or unexplained
random shutdown.
Cause: Incorrect F2PIP Power on Reset (POR) timing
Cure:
Product Support · Mail Stop INH 900
P.O. Box 1976 · Indianapolis, IN 46206 -1976
TV 00-003
Television
TTI TV 00-003
MODELS: CTC195/197, MM10x, CTC203 Chassis with F2PIP
DATE: July 14, 2000
TOPIC: F2PIP
The following modifications are required to change FPIP POR timing for added
reliability.
NOTE: All chassis manufactured after 950XXXXXX have the modification
installed.
Follow these steps in order.
All CTC195/7 – All CTC203
1. Insert a 2.2K ohm 0805 size SMD resistor from pin 21 of U18100 to ground
(192096). Note: This may require “piggybacking” the resistor on top of
C18114.
MM101 Chassis
1. Insert a 2.2K ohm 0805 size SMD resistor from pin 21 of U18100 to ground
(192096). Note: This may require “piggybacking” the resistor on top of
C18119.
The next steps are dependent upon the chassis under repair.
CTC195F, F2, F3 chassis
2. Replace R18111 with a 100K resistor (192084)
3. Replace C18118 with a 330nf cap (220132)
4. This concludes the modifications for these chassis.
CTC195/7 (except CTC195F,F2,F3) and all CTC203
2. Replace R18116 with a 100K resistor (192084). Both are off pin 23 of
U18100
3. Replace C18121 with a 330 nanofarad cap (220132)
4. This concludes modifications for these chassis.
MM101 Chassis
No further modifications are necessary.
-----------end insert--------------
Wayne Vanaman
Omega Electronics
6904 W Fairfield Dr
Pensacola, Fl. 32506-3310
Wayne@xxxxxxxxxxxxxxxxxxxxx
WWW.PensacolaTVRepair.Com
850-456-5995 voice
850-458-6369 fax
Jim Myers wrote:
> Wayne, take a look at the top service bulletin for this model in
> PartsFinder, TV00-003, maybe that is the one.
>
> The Old Master Technician
> ********************************
> Since 1972 *
> Jim Myers *
> Telrad Electronics *
> Fort Wayne Indiana *
> ********************************
>
>
> Alvin Rose wrote:
>
>>Hello Wayne
>>The set is a RCA model F32665
>>it is a CTC203CH3 chassis 32 inch screen.
>>Alvin
>>Wayne Vanaman wrote:
>>
>>
>>
>>>Alvin:
>>>I looked all over the Thomson web site and didn't see anything that
>>>looked like it pertained to this. I just don't know what to look for.
>>>
>>>Please get the full model/service number. There are sooo many
>>>variations of this, the ch3 does narrow it down some, probably enough,
>>>But, Murphy's Law applies.
>>>
>>>I will be in early tomorrow, and then probably early Sunday morning.
>>>
>>>Wayne Vanaman
>>>Omega Electronics
>>>6904 W Fairfield Dr
>>>Pensacola, Fl. 32506-3310
>>>
>>>Wayne@xxxxxxxxxxxxxxxxxxxxx
>>>WWW.PensacolaTVRepair.Com
>>>
>>>850-456-5995 voice
>>>850-458-6369 fax
>>>
>>>
>>>Alvin Rose wrote:
>>>
>>>
>>>
>>>
>>>>Hello Wayne
>>>>I understood there is a modification for the problem
>>>>on the Thompson web site but I don't have the url or password
>>>>for technical support there..I will do the checks as per your
>>>>instructions to isolate the problem. I am wondering if there
>>>>is a way to bypass the PIP function..I have to use the board
>>>>as the audio and video inputs are on it Otherwise there is a
>>>>plug in jumper available to take it out ..Thanks for the info
>>>>it is much appreciated.
>>>>Alvin
>>>>Wayne Vanaman wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Alvin:
>>>>>I have no idea what Lindsey is talking about. I don't know anything
>>>>>about a "power on reset" repair.
>>>>>
>>>>>On these sets (and most RCAs) at plug in the micro inventories the
>>>>>chassis to determine which audio functions, PIP functions, convergence
>>>>>functions, etc, are installed on the chassis. The micro then knows
>>>>>which menus to enable.
>>>>>
>>>>>If the set operates without the PIP module installed it would indicate a
>>>>>faulty PIP circuit. These jumpers mentioned are simply passing the
>>>>>video thru the absent pip module.
>>>>>
>>>>>The primary suspect would be the PIP processor, u18100 248620 $42 cost.
>>>>>
>>>>>Scope the clock and data lines. At plug in there should be a burst of
>>>>>activity that ceases. If the activity continues the set will not turn on.
>>>>>
>>>>>You can do the next two steps in either order.
>>>>>
>>>>>1. Desolder pins 26 and 27, clock and data respectively, of PIP
>>>>>processor U18100. Check for data activity that ceases. See if the set
>>>>>comes on. You probably will not have a picture. If so, this chip is
>>>>>probably bad.
>>>>>
>>>>>2. Pin 26 of IC18100 is data out. It feeds SMD Q18102 which couples to
>>>>>Q18101 the data buffer to the PIP data input. If this transistor is
>>>>>faulty it can cause a dead set, and you probably did not have good data
>>>>>pulses on pin 27. Remove the transistor and if the set comes on,
>>>>>probably with no picture as the PIP processor has not answered the
>>>>>micro, this transistor is bad.
>>>>>
>>>>>Wayne Vanaman
>>>>>Omega Electronics
>>>>>6904 W Fairfield Dr
>>>>>Pensacola, Fl. 32506-3310
>>>>>
>>>>>Wayne@xxxxxxxxxxxxxxxxxxxxx
>>>>>WWW.PensacolaTVRepair.Com
>>>>>
>>>>>850-456-5995 voice
>>>>>850-458-6369 fax
>>>>>
>>>>>
>>>>>Alvin Rose wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>>Hi Lindsay
>>>>>>You were correct about the test..
>>>>>>I installed the jumpers and set worked ok
>>>>>>however I can not find any information to
>>>>>>fix the problem can you advise how to do it.
>>>>>>Alvin
>>>>>>
>>>>>>Lindsey Altman wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Hi,
>>>>>>>
>>>>>>>Do a "power on reset" test. Remove the PIP module. It's the first =
>>>>>>>one
>>>>>>>beside the tuner. On connector J12101, the farthest one looking into the
>>>>>>>board, jump pins 3, 7, & 9 together. Also jump pins 5, 6, & 8 together. =
>>>>>>>Test
>>>>>>>unit for normal operation. If this test is a success, from the Thomson
>>>>>>>website do the modifications to repair the power on reset circuit. =
>>>>>>>Someone
>>>>>>>else will have to send you that service bulletins my send is broken.
>>>>>>>
>>>>>>> HTH,
>>>>>>> Lindsey
>>>>>>>=20
>>>>>>>
>>>>>>>Lindsey Altman
>>>>>>>At Home Service Company
>>>>>>>440 Cedar Ave.
>>>>>>>Claxton, Georgia 30417
>>>>>>>912-739-1019
>>>>>>>athomeservice@xxxxxxxxxxxxx
>>>>>>>
>>>>>>>
>>>>>>>-----Original Message-----
>>>>>>>From: techassist-bounce@xxxxxxxxxxxxx
>>>>>>>[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Alvin Rose
>>>>>>>Sent: Friday, October 07, 2005 2:59 PM
>>>>>>>To: techassist
>>>>>>>Subject: [TechAssist] CTC203CH3 RCA CHASSIS
>>>>>>>
>>>>>>>We have a RCA CTC203CH3 which goes
>>>>>>>into shutdown after one second..The base waveform of
>>>>>>>the output transistor looks ok and the high voltage
>>>>>>>comes up to 23 kv for a second..Output transistor
>>>>>>>and scanning diode checks ok..B plus is 134 volts
>>>>>>>on flyback..Any help with this unit would be greatly
>>>>>>>appreciated.
>>>>>>>Alvin Rose
>>>>>>>Radio & Tv Centre
>>>>>>>Marystown, Nl
>>>>>>>-------------------------------------------------------------------------=
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