Noodle
LISTEN! I smell Hi-Fi.
First, a pre-"thanky" for any help
I'm not too familiar with Technics units, I always piddle with Pioneer.
But a friend has let me diagnose a unit for him that blows the main 4A fuse on power up.
I put a 3A fuse in it's place, hooked the unit to a DBT and the bulb stays bright.
I did pull diodes D701-704 and D705 & D706, they all checked out.
So without removing the STK-0040 power packs, I did de-soldered pins 1,2,3,7,8,9 from the board, checked for no connections from these pins to the solder pads, good there.
Hooked the unit back to the DBT, powered up and the light went dim.
I check for a short from pins 2 to 3 and 8 to 9 on both packs, one pack showed a short between those pins.
Questions:
I suppose there is no replacement for this shorted pack?
An original replacement is my only hope, correct?
I'm not too familiar with Technics units, I always piddle with Pioneer.
But a friend has let me diagnose a unit for him that blows the main 4A fuse on power up.
I put a 3A fuse in it's place, hooked the unit to a DBT and the bulb stays bright.
I did pull diodes D701-704 and D705 & D706, they all checked out.
So without removing the STK-0040 power packs, I did de-soldered pins 1,2,3,7,8,9 from the board, checked for no connections from these pins to the solder pads, good there.
Hooked the unit back to the DBT, powered up and the light went dim.
I check for a short from pins 2 to 3 and 8 to 9 on both packs, one pack showed a short between those pins.
Questions:
I suppose there is no replacement for this shorted pack?
An original replacement is my only hope, correct?