Set is dead, Found Q601 & 602, and H- out, shorted, Res R607 open. Replaced
all and tried to start set with reduced voltage. Got the relays to click
about every 2-3 seconds. Came up a little more on the voltage and nothing,
Now set will not even attempt to start up, Cant find any shorts. ESR caps
in the P/S ok. Not getting B+ to H- out. Dont have a schematic, and my
local supply does not have it. Anyone have any tips on what I missed. Or
maybe a schematic of the P/S?
Thanks
Charlie

Charlie,check the B+ rail from the power supply.These models sometimes have
protection fuses in line to protect the power supply from s/c hot.
Cheers
Joe
"Charlie East" wrote in message
...
Set is dead, Found Q601 & 602, and H- out, shorted, Res R607 open.
Replaced
all and tried to start set with reduced voltage. Got the relays to click
about every 2-3 seconds. Came up a little more on the voltage and nothing,
Now set will not even attempt to start up, Cant find any shorts. ESR caps
in the P/S ok. Not getting B+ to H- out. Dont have a schematic, and my
local supply does not have it. Anyone have any tips on what I missed. Or
maybe a schematic of the P/S?
Thanks
Charlie

Did you fix the reason the HOT shorted?
Usually bad solder connections in the h-driver circuit.
If not you may have just blown all those parts you already replaced once.

David

Charlie East wrote in message
...
Set is dead, Found Q601 & 602, and H- out, shorted, Res R607 open.
Replaced
all and tried to start set with reduced voltage. Got the relays to click
about every 2-3 seconds. Came up a little more on the voltage and nothing,
Now set will not even attempt to start up, Cant find any shorts. ESR caps
in the P/S ok. Not getting B+ to H- out. Dont have a schematic, and my
local supply does not have it. Anyone have any tips on what I missed. Or
maybe a schematic of the P/S?
Thanks
Charlie

Did not fix anything in the H-out circuit, Will do that just as soon as I
get two more c-4834 for Q601 & 602. I tried pluging in power with the P/S
board disconnected from the main board, It didnt like that, blew r 607 and
Q601 & 602, Thanks for the replys, Sure wish I had a schematic on this
bugger.
Charlie


"David" wrote in message
...
Did you fix the reason the HOT shorted?
Usually bad solder connections in the h-driver circuit.
If not you may have just blown all those parts you already replaced once.

David

Charlie East wrote in message
...
Set is dead, Found Q601 & 602, and H- out, shorted, Res R607 open.
Replaced
all and tried to start set with reduced voltage. Got the relays to
click
about every 2-3 seconds. Came up a little more on the voltage and
nothing,
Now set will not even attempt to start up, Cant find any shorts. ESR
caps
in the P/S ok. Not getting B+ to H- out. Dont have a schematic, and my
local supply does not have it. Anyone have any tips on what I missed. Or
maybe a schematic of the P/S?
Thanks
Charlie