Al THank's I've changed the 143V diode and checked the cap , so that's not what's wrong. WC al m wrote: >Do you have a print of the power supply? The 15V supply is ok so the >regulator is probably working. Check the diode on the 143V line and the >filter Cap. >Al Marquardt >ampm@xxxxxxx >Al Marquardt Electronic Repair >206 W Main >Girardville Pa. 17935 >----- Original Message ----- >From: "Warren" <warrenca@xxxxxxxxx> >To: <techassist@xxxxxxxxxxxxx> >Sent: Sunday, March 06, 2005 2:15 PM >Subject: [TechAssist] Re: Projo RCA CTC169 Dead with wrong standby voltages > > > > >>I would like to know : >>If there is a problem in the horiz section or elsewhere will it cause >>the P.S. to give wrong standby voltages when the set is off >>and won't turn on??. >>I must establish if the problem is in the PS or not. >>When you read the hints on the fishe(RCA) it says that, if you have >>the 5 V standby then the problem is probably elsewhere. >>I have the 5V but the 15V standby is at 14.2 and the 143 is high and my >>meter is having trouble reading the voltage. >>Changed the meter and the same thing. >>3 Volts also between the cathodes of two diodes at PS (#'s escape me >>right now) is too high .All say that this should be <1V when in standby >>If you read my first posts you will see that I've changed many of the >>usual parts. >>I must establish if the PS should give proper voltages on it's own when >>plugged into the wall and possible problems elsewhere??? >>Thanks >>Warren C >> >>Bill Grabowski wrote: >> >> >> >>>Is your Horiz output circuit okay. There are 5 shutdown circuits >>>employed on these CTC169's >>> >>>Pete wrote: >>> >>> >>> >>> >>>>I always replace the caps with the same value on the set, The standby B+ >>>>must be 138-140V, running voltage 143-145V, . >>>>Remove and clean the running voltage control, inside the black plastic >>>>cover. >>>>check audio output chips removing the plug in the audio board. >>>>Good luck >>>> >>>>pete >>>> >>>>Perdomo TV, Inc. Since 1972 >>>>MIami, Fl. >>>> >>>> >>>>From: Warren" <warrenca@xxxxxxxxx> >>>>To: <techassist@xxxxxxxxxxxxx> >>>>Sent: Friday, March 04, 2005 10:47 PM >>>>Subject: [TechAssist] Projo RCA CTC169 Dead with wrong standby voltages >>>> >>>>Hi all! >>>>I will list the work so far: >>>>15 V standby =3D 14.2 >>>>5V standby =3D4.9V >>>>Raw B+=3D151V >>>>Regulated B+ is too high I think ...The meter does not like the signal >>>>at TP4101 some times 197V sometimes 1.97V?? Should the Reg B+ be 143V >>>>before turn on???? >>>>=A0=A0From cathode of CR4106 to Cathode of CR4101 first I had 2 >>>>Volts.... Now >>>>after changing diodes I get 3 volts??? >>>>Should be under 1 Volt. >>>>Installed a startup kit from Global Q4101, U4101, C4102, C4118, C4108 >>>>(47uf) which also was a 47UF before. >>>>My schematic shows 39uf ?? does this make a difference?? Caps were >>>>installed first with Q4101 , IC =A0 U4101 was installed >>>>afterwards. >>>>Also changed C4104(15uf) with also no change. >>>>I also tried to isolate the H out (curiosity) - no change >>>>I've read many tips but most of these point to the parts that I've >>>>already changed. >>>>Can someone brush up my 169 skills. >>>>What am I missing?? >>>>Does anyone have a troubleshooting flow chart for the 169?? This would >>>>help. >>>>BTW when you push the on button you can see the front led give a slight >>>>single blink. >>>>TIA all ! >>>>All tips and comments welcome. >>>>------------------------------------------ >>>> >>>>----------------------------------------------------------------------------- >>>>This Email List is Public. Remove: http://www.tech-assist.org/remove.htm >>>>Lost Password: http://www.tech-assist.org and select "Login Problems?". >>>>Email Archives: //www.freelists.org/archives/techassist/ >>>> >>>> >>>> >>>> >>>> >>> >>> >>> >>----------------------------------------------------------------------------- >>This Email List is Public. Remove: http://www.tech-assist.org/remove.htm >>Lost Password: http://www.tech-assist.org and select "Login Problems?". >>Email Archives: //www.freelists.org/archives/techassist/ >> >> >> > > >----------------------------------------------------------------------------- >This Email List is Public. Remove: http://www.tech-assist.org/remove.htm >Lost Password: http://www.tech-assist.org and select "Login Problems?". >Email Archives: //www.freelists.org/archives/techassist/ > > > > ----------------------------------------------------------------------------- This Email List is Public. Remove: http://www.tech-assist.org/remove.htm Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/