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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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RCA F19421 Ch# TX808s
Dont have a schematic, Set will turn on , Full volume, Cant turn it down.
Volume indicator on screen is at max, Cant change channels.Did notice one big transistor TP65 is hot to touch. Have screen, but cant get any menu items. Like its locked up in vol up. The vol switches are. good. Anyone have a schematic? Charlie |
#2
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On Thu, 11 Aug 2005 20:32:01 -0500, "Charlie East"
wrote: Dont have a schematic, Set will turn on , Full volume, Cant turn it down. Volume indicator on screen is at max, Cant change channels.Did notice one big transistor TP65 is hot to touch. Have screen, but cant get any menu items. Like its locked up in vol up. The vol switches are. good. Anyone have a schematic? Charlie What happens if you run it with Volume+ removed? What are voltages like around the 2 volume controls? Tom |
#3
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Checked the voltages on the switchesVol- 5.5vdc, vol+ was 3.5vdc, also
noticed one of the channel buttons was low, Hit them with contact cleaner and push them all a few times, now the set works fine, Charlie "Tom MacIntyre" wrote in message ... On Thu, 11 Aug 2005 20:32:01 -0500, "Charlie East" wrote: Dont have a schematic, Set will turn on , Full volume, Cant turn it down. Volume indicator on screen is at max, Cant change channels.Did notice one big transistor TP65 is hot to touch. Have screen, but cant get any menu items. Like its locked up in vol up. The vol switches are. good. Anyone have a schematic? Charlie What happens if you run it with Volume+ removed? What are voltages like around the 2 volume controls? Tom |
#4
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Charlie East:
Well.... there you have it .... Have screen, but cant get any menu items. Like its locked up in vol up. The vol switches are. good. Anyone have a schematic? You can thank Tom MacIntyre for insisting that you "check" the switches again. electricitym .. .. |
#5
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On Sat, 13 Aug 2005 17:58:50 -0500, "Charlie East"
wrote: Checked the voltages on the switchesVol- 5.5vdc, vol+ was 3.5vdc, also noticed one of the channel buttons was low, Hit them with contact cleaner and push them all a few times, now the set works fine, Charlie Heck...should've bought a lottery ticket that day too. :-) Tom "Tom MacIntyre" wrote in message .. . On Thu, 11 Aug 2005 20:32:01 -0500, "Charlie East" wrote: Dont have a schematic, Set will turn on , Full volume, Cant turn it down. Volume indicator on screen is at max, Cant change channels.Did notice one big transistor TP65 is hot to touch. Have screen, but cant get any menu items. Like its locked up in vol up. The vol switches are. good. Anyone have a schematic? Charlie What happens if you run it with Volume+ removed? What are voltages like around the 2 volume controls? Tom |
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