Just discovered the 4.9 v on EEPROM6 and micro 19 are zero,even when I have menu,and zero after menu disappears and set locks up with pix and audio! Al Leatherman 224 RT. 46 Mine Hill, NJ 07803 973-361-5796 WWW.ALS-TV.NET ----- Original Message ----- From: "Gary McCartney" <gary@xxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Wednesday, July 06, 2005 11:55 AM Subject: [TechAssist] Re: Fw: RCA CTC 187 menu disappears,volume works > Al, does the B+ stay firm on the eeprom and micro after the set warms up? > > Gary > > > > > Gary McCartney > > McCartney Electronics > Guelph Ontario Canada > Est. 1984 > email: gary (at) number63.ca > > > > > > > > Al L wrote: >> Thanks again Gary.I may have to use chipper checker,after i put in the >> other >> parts,crystal first. i had a used crystal, but ordered a new one.Wayne V >> put >> me on to checking the crystal,and the clock dies(goes flat)after a short >> time,and the set plays with whatever was tuned in,no response from >> buttons >> or remote.Thanks again. >> Btw, when cold,I get a good menu screen,but it never stays long >> enough >> to get to auto program! >> >> Al Leatherman >> 224 RT. 46 >> Mine Hill, NJ 07803 >> 973-361-5796 >> WWW.ALS-TV.NET >> >> ----- Original Message ----- >> From: "Gary McCartney" <gary@xxxxxxxxxxx> >> To: <techassist@xxxxxxxxxxxxx> >> Sent: Wednesday, July 06, 2005 9:09 AM >> Subject: [TechAssist] Re: Fw: RCA CTC 187 menu disappears,volume works >> >> >> >>>Al, I did a check in my saved messages, and the one I had was a >>>CTC197AK2. Here is what I had to say at the time: >>> >>> >>>After I wrote the original message today, I had an idea. If I would >>>install the new eeprom in the TV and then go to the menu and disable the >>>front panel buttons, then save the eeprom file, I should be able to >>>compare the factory set eeprom file with the menu-adjusted eeprom file. >>>Yes, it showed that the only bytes in the eeprom that changed were >>>various ones from address 0000 to 000F (the first row of 16 bytes). I >>>then copied the factory set bytes from the above mentioned addresses to >>>the customer's original data file. Programmed the eeprom and tried it. >>>Didn't solve the problem. Then I noticed that some of the bytes in row >>>two (addresses 0010 to 001F) of the customers file didn't match up with >>>the factory set eeprom file. The last four bytes of the customer's file >>>looked suspicious (addresses 001C, 001D, 001E, and 001F). They were: FF >>>FF FF FF. I copied the data from the factory set eeprom file (data was >>>08 00 09 00) and reprogrammed the eeprom again. Installed it and the >>>problem was now cured. The menu button on the front of the TV now works. >>>I tested disabling it and re-enabling it in the menu and it works fine. >>>I have connected my cable modulator to the set and I get clear sharp >>>pictures all the way up to channel 79 which is the highest my modulator >>>will tune. I haven't noticed any other functions not operating properly. >>> >>> >>> >>>Gary >>> >>> >>>My first reply: >>> >>>Al, I had one like that and it was a corrupted byte in the eeprom. >>> >>> >>> >>> >>>Gary McCartney >>> >>>McCartney Electronics >>>Guelph Ontario Canada >>>Est. 1984 >>>email: gary (at) number63.ca >>> >>> >>> >>> >>> >>> >>> >>>Al L wrote: >>> >>>>PM >>>>Subject: [TechAssist] RCA CTC 187 menu disappears,volume works >>>> >>>> >>>> >>>> >>>>>I need to know if the micro and the T chip have their own separate >>>>>clocks >>>>>or >>>>>do they share one.. >>>>> The remote and infra red pick up produce pulses at the input of >>>>>micro,but when locked up,there seem to be no pulses on the clock pins >>>>>of >>>>>the >>>>>T chip,or micro.If I float the micro should I have clock pulses on one >>>>>chip, >>>>>the good one? >>>>> The buttons on front fire up the set,do volume,and produce the >>>>>menu.About >>>>>the time I get to auto program,the menu disappears, and I am stuck with >>>>>one >>>>>channel.Sometimes it turns off. >>>>> Any ideas,or does someone have an old training manual for this >>>>> set?TIA. >>>>> >>>>>Al Leatherman >>>>>224 RT. 46 >>>>>Mine Hill, NJ 07803 >>>>>973-361-5796 >>>>>WWW.ALS-TV.NET >>>>> >>>>> >>>>>----------------------------------------------------------------------------- >>>>>This Email List is Public. 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