Call Jeffery Dalmer and buy a spare finger. Doug Keller Wis-Kel Electronics 101 Freeland Ave. Terra Alta, WV USA 26764 dek@xxxxxxxxxxxxxx dek@xxxxxxxxxxxxxxx http://www.tech-assist.org "Learn from the mistakes of others, because you won't live long enough to make them all yourself" daryls_tv@xxxxxxx wrote: >Another day shot to Hell..... >I spent all day again on this dog. >It was mentioned several times to replace U7301. This was the first par= t I replaced to no avail. I didn't have another new one to try but I had= the next best thing. I had a working set to borrow parts from. I repla= ced the IC again but still no change. Thanks to Barry Thompson for the f= low chart. I followed it out and found nothing wrong. I compared voltag= es to the working set and didn't find anything out of line. I swapped ou= t the varactor diodes without any help as well. I figured I couldn't mes= s it up any more than what it was... so I played around with the coils an= d parameters. Now I have some small gains but still not acceptable. Cha= nnel 2 has lines and motor boating. Ch. 3 through 6 is acceptable but no= t great. Ch. 7 through 10 is good. Ch.11 has no picture and sound, just= lines. Ch. 12 through 18 are good. Ch. 19 trough 22 are ugly with line= s. Ch. 23 through 39 are great. Ch. 40 through 48 has poor picture with= lines and has noise in the sound. Ch. 49 > & 50 has nothing but motor boating. Ch. 51 up is great until Ch. 99 wh= ich has lines and a poor picture. That is the highest channel on the cab= le system. >I can still place my finger near some of the coils in the tuner and it w= ill perk right up. >Any other ideas would be appreciated. >Thanks, >Daryl >Daryl's TV >2402 Wyoming Ave. >El Paso, TX 79903 >915-565-9184 Voice/Fax >daryls_tv@xxxxxxx >www.angelfire.com/tv2/daryls_tv > >----- Original Message ----- >From: daryls_tv@xxxxxxx >Date: Sun, 10 Oct 2004 12:42:56 -0600 >To: TechAssist@xxxxxxxxxxxxx >Subject: [TechAssist] RCA, G27304DT, CTC177AM2, Tuner problem > > =20 > >>Hi, >>This RCA, model # G27304DT, ch. CTC177AM2, is really kicking my behind.= >>It started with the complaint from the customer of losing some channels= with lines in the picture. I pulled it into the shop and did the usual = tuner re-soldering job. Set looked great and was delivered only to find = out it was doing the same thing. Took it back to the shop where it worke= d great. I re-soldered everything again plus all of the connections on t= he smds. Delivered it again and you guessed it...same thing. >>The channels from 40 through 50 were either missing or full of lines or= motor boating. I played with some of the tuner parameters and it seemed= to work but not to my satisfaction. The customer was pleased, so I left= =2E A week later, same thing. >>I pulled it back to the shop where it worked fine. BTW... the customer= has another set that works fine on the same cable line. I put an attenu= ator on my cable line and the trouble showed up and even worse. It gave = me channels 2-6, 18-22, and 40-50 with the problems. I re-soldered every= smd in the video section besides the tuner again and all of the grounds = in the set... no help. Looked with a high power magnifier for cracks in = the print (none found). Replaced IC7301, C7414(cracked), CR7102(didn't c= heck the same as the others), Q7102(RF amp), U3201(eeprom), & U1001(t-chi= p). Did the tuner alignments after each parts change but still no joy. = I found that if I would place my finger over coils L7114 & L7112, the set= would start to function properly. I got the same effect placing my fing= er over L7115, L7113 & L7111. I didn't have to touch the coils, just put= my finger near the coils. This symptom reminds me of the old tube days = when the grid neutralizer trimmer cap was >> =20 >> > o > =20 > >> ut of adjustment on the RF amp tube. >>I really hope someone has encountered this and has a cure.... Help!! >>Sorry for the long post but I deemed it necessary to explain the proble= m. >>Thanks, >>Daryl >>Daryl's TV >>2402 Wyoming Ave. >>El Paso, TX 79903 >>915-565-9184 Voice/Fax >>daryls_tv@xxxxxxx >>www.angelfire.com/tv2/daryls_tv >> >> >>--=20 >>___________________________________________________________ >>Sign-up for Ads Free at Mail.com >>http://promo.mail.com/adsfreejump.htm >> >> >>-----------------------------------------------------------------------= ------ >>Lost Password: >>http://www.tech-assist.org and select "Login Problems?". >>Email Archives: >>//www.freelists.org/archives/techassist/ >> =20 >> > > > > > > =20 > ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/