I am starting slowly on my BG 4002, opened it up, the wood frame loose and missing some spacers to hold it steady, the belts must have been replaced at some point they look good.
The voltage selector is the well known non working type, this deck is 117V only. There is one big cap 1000 uF 50 V it has 3 wires connected, 2 at the top and one at the bottom, with what do I change it ??
I checked the mechanical moving parts and all was like too heavy moving, so I applied oil where needed, let it soak in a couple of minutes, connected the main power to my variac and my DMM to the 30 V supply and slowly increased to 120 V the 30V OK and nothing smoked.
Pressed 33 the motor started running, pressed 45 and nothing happened, pressed start, the tonearm assembly moved to center and back, I did that a couple of times to get the oil worked in on shafts and the threaded spindle
As I dont have a cartridge I set the tracking scale to "0" attached a screw to the tonearm witha cable strap, and balanced it to "0" set the scale to 1,5, put back the belt platter, belt and the record platter, put on a 7" record and pressed start, tonearm moved, light in 33 display, light in detector arm, light in photo sensors detected record and the speed switched to 45, light in 45 display tonearm lowered, a small touch to the tonearm and it started moving to center and then back to start..tried the 45 switch again but still not working.
I then started dismantling, first the switch board, and here you see the switch assembly, only the 45 switch is very dark, the rest less so, with a fiberglass brush I could get into the switches for cleaning, I will go after each switch with Deoxit later on.
Then onto the PCB 1, looks good no burning marks and no components visibly damaged, I will change the electrolytic caps and measure the tantalums, all the trimmers look ugly so they will go too
More to come
Location: Mexico city
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
Collecting Vinyl
Restored Jukebox Wurlitzer 1050
