I was going to say earlier to check voltages under power like Dave is suggesting but I thought you probably had the receiver too far apart to power it. Checking for whether or not that relay is getting its 12V to the coil would let you know pretty quick if it's operable or toast. Obviously if it is getting the 12V the relay is no good. If it's not, work back from there and find out why.
Yeah, this is a logistic nightmare. I currently have it still mostly connected with the one side of the main board lifted up so I can get to the foil side. If I do remove the whole thing it's going to be a big floppy setup where the chance of damaging the legs to the 10 big resistors is huge. But not sure I want to go and scratch over there if the problem is probably over here in the corner at the relay.
@davenn: can you measure AC out of that sub trans transformer ? Would this be measured on the top and bottom legs on the RH side of the sub transformer as seen on the diagram?
@davenn: can you measure AC out of that sub trans transformer ? Would this be measured on the top and bottom legs on the RH side of the sub transformer as seen on the diagram?
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yes it does, reverse the voltage and you are basically putting a short circuit across the plugpack PSU
no, the left side is the secondary ( output) the side going to the diodes that I asked for a voltage test on
the right side has mains voltage on it, prefer you not to be playing with mains at this stage
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ohhhhhhhhhhhh so we weren't on the same page
OK you were on the board layout .... and its opposite to the way the circuit diagram is laid out .... all my comments are referenced to the circuit diagram
Yeah, so relieved we sorted that out. Was considering giving up electronics there for a moment. But can we work on page 20. It's a more realistic layout of whats going on and I can understand it.
OK Getting 11VAC on secondary legs of sub trans
OK Getting 11VAC on secondary legs of sub trans
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tho it is good to be able to swap between both, the board layout is good for finding where components are, the schematic shows how things are connected ... easier to follow through
OK sounds reasonable
now do the DC on C158
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no, to the negative terminal of C158
no it's inferring that D149 and/or D153 are faulty
power unit down and you will need to check those 2 diodes
ohhh that may include D152 as well
Do you have any 1N4007 diodes ? ... a very common/popular diode
just replace them if you have spares ... you can always test them once they are out of cct, just for curiosity
I will probably have to pull all those diodes to properly check them and then I might as well replace them as they're out.
Interesting, using X1 reading on AMM diodes check good. deflection one way. Using x10K scale diodes all fail. deflection both ways. Back planes could come into play here?
Interesting, using X1 reading on AMM diodes check good. deflection one way. Using x10K scale diodes all fail. deflection both ways. Back planes could come into play here?
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