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2245 in protection

Voltage at j757 is -30.61. I hate to cut out in the middle of this, but it's wifey's birthday, and I "have" to get out and get a gift before this evening. I'll look back in later tonight.. Thanks guys.
 
OK guys, duties fulfilled so I can settle down and get back to business. I just retook all the measurements you asked for just the sake of accuracy:


j757= -37.3

j761= -37.8

j753= +37.1

I didn't try to adj. R762 because I didn't know which pin to check while adjusting.
 
bluescat said:
I didn't try to adj. R762 because I didn't know which pin to check while adjusting.
Click to expand...
j757 . put it back to centre if it doesn't adjust enough ..you are looking for 0v
i don't think it will adjust . just interested how much if at all
 
ok this might take some finding as there aren't all the voltages marked on the schematic
first with power off check resistance of r768 r769 0.2 ohms . leave in circuit .
if ok best suggestion i have is with power off still check all resistors first checking them on good channel then on bad channel .write down any that vary greatly .
bk might have a better idea ?
 
I'm getting 1376 ohm on r768. I can't reach r769 without removing heat sink. I'll try to get to that tomorrow.
 
sorry i put the wrong numbers ..this schematic is hard to read the numbers .
should be r788 r789 ..
bias reading is a good idea
 
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