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Posted by Mike Clark on December 26, 2004 at 14:41:51:
In Reply to: AU-717 left channel preamp dead posted by Steven M Blumenfeld on May 14, 2004 at 23:59:13:
: I need some help. After many years of faithful use my AU-717 has gone on the fritz. The left channel preamp output is dead.
: 1) Amp section is fine
: 2) Switches on front panel are all working fine - R/L audio out of F-2720 board ok
: 3) coupling switch on back is working - i am getting continuity on both sides of the switch when in the connected position
: 4) power protection relay makes good contact on both right and left
: so here is the problem the left channel seems to be dead. There is a VERY little audio if i crank it up. Intermittantly If i leave it on for an hour plus it will pop - then power protect off -Then come back on and then the left channel works.
: i dont have a schematic but it seems the problem is on the F-2663 board
: Anybody have a clue what i should look for - the 2663 board is a bear to pull out
: thanks
: steven