Symptom: Intermittent Blinking of Video with High Contrast or Bright Scenes Cause: Possible damage to diodes in AKB Curcuit Resolution: Replace Diode 6003 with part number 9340 553 52115 and Resistor 3669 with part number 4822 117 11503. When Replacing the above parts also replace Diode 6012 and Diode 6025 with part number 9340 553 52115 NOTE: There have been 2 version of this board. To find which version you have look at the top of the board for 3135 013 3203.9. These parts will be found on board revision .9 only and does not apply to any other versions.They are located at D-4 on the bottom of the board close to plug 1083. Diode 6003 is labeled however Resistor 3669 is not, it is located next to pin 10 of plug 1083 and is the first part between pin 10 and the edge of the board. Applies To: 43P8341, 43P834199, 43P8341A37, 43P8341A99, 50P8341, 50P834199, 50P8341A37, 50P8341A99, 50P8342, 50P834299, 50P8342A37, 50P8342A99, 50PP241, 50PP24199, 55P8241, 55P824199, 55P8241A37, 55P8241A99, 55P8288, 55P828899, 55P8288A37, 55P8288A99, 55P8341, 55P834199, 55P8341A37, 55P8341A99, 55P8342, 55P834299, 55P8342A37, 55P8342A99, 55PP241, 55PP24199, 60P8241, 60P824199, 60P8241A37, 60P8241A99, 60P8288, 60P828899, 60P8288A37, 60P8288A99, 60P8341, 60P834199, 60P8341A37, 60P8341A99, 60P8342, 60P834299, 60P8342A37, 60P8342A99, 60PP241, 60PP24199, 64P8341, 64P834199, 64P8341A37, 64P8341A99, 64P8342, 64P834299, 64P8342A37, 64P8342A99, PTV910, PTV914, PTV915, PTV916, PTV918 ----- Original Message ----- From: " jack spencer" <jackson1@xxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Friday, February 08, 2008 2:32 PM Subject: [TA-A] Re: RCA F35750ST (CTC169BG5) SHUT DOWN WHEN P1905 CONNECTED to AUDIO PCB > Not worried about the F35750 at present, what I need is help on a philips > 50P8341A, proj. > TV. > > Symptom: intermittent no video or audio when turned on. Replaced the > Focus/G2 block, which apparently causes problems of this nature. Learned > from posts at > http://www.freelists.org/archives/techassist/10-2004/msg00953.html. G2 is > monitored and if incorrect will disable video and sound? Initially > changed the upright Daugher PCB located on the left, which generally > caused problems, but subbed out with a known good one, and still the same > symptom, it's not the Daughter PCB. The archive address suggests a Kit > for the power PCB, but HV, sweep, etc, is OK, and don't think this > modification will do much good, they want 30 dollars for the Kit. If > someone can help me with this problem which I'm sure is a common problem > with this unit I'd appreciate it: Chassis PTV 915. > > Thanks > > --- TeleramaTV@xxxxxxxxxxx wrote: > > From: "Telerama" <TeleramaTV@xxxxxxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Subject: [TA-A] Re: RCA F35750ST (CTC169BG5) SHUT DOWN WHEN P1905 > CONNECTED to AUDIO PCB > Date: Fri, 8 Feb 2008 03:14:22 -0500 > > Hey Jack, > If I remember, aren't those TDA's insulated from the heatsink? Check > continuity. I don't know why there is no 901 on the schematic. How about > the > header location from the supply? > > Give me a component location right off that J901 on the audio board > > > > > ----- Original Message ----- > > > > From: " jack spencer" <jackson1@xxxxxxxxxxxx> > To: "freelists.org " <techassist@xxxxxxxxxxxxx> > Sent: Tuesday, February 05, 2008 6:21 PM > Subject: [TA-A] RCA F35750ST (CTC169BG5) SHUT DOWN WHEN P1905 CONNECTED to > AUDIO PCB > > >> Dear Forum members: >> Shut down when connector P1905 connected to upright Audio PCB. >> 4 pin plug, B+ and B- OK, no drop in voltage when connected. >> Audio outputs replaced (TDA's). what are the signals, or voltages >> associated with P1905, in order to troubleshoot or any other helpful >> hints? >> >> Thanks, >> Jack >> >> >> >> ---------------------------------------------------------------------------- >> Netscape. Just the Net You Need. >> ------------------------------------------------------------------------------ >> Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with >> remove >> as subject. >> Set Vacation >> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation >> Lost Password: http://www.tech-assist.org and select "Login Problems?". >> Email Archives: http://www.freelists.org/archives/techassist/ >> > > ------------------------------------------------------------------------------ > Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove > as subject. > Set Vacation > mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation > Lost Password: http://www.tech-assist.org and select "Login Problems?". > Email Archives: http://www.freelists.org/archives/techassist/ > > > > > _____________________________________________________________ > Netscape. Just the Net You Need. > ------------------------------------------------------------------------------ > Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove > as subject. > Set Vacation > mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation > Lost Password: http://www.tech-assist.org and select "Login Problems?". > Email Archives: http://www.freelists.org/archives/techassist/ > ------------------------------------------------------------------------------ Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove as subject. Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: http://www.freelists.org/archives/techassist/