Hello! Long time reader and occasional poster of the old forums here. (I was unable to restore my account and have created a new one.)
I’m seeking advice on repairing a Beogram 4004 that a I recently purchased. The unit appears to be in vey good condition, and as far as I can tell is functioning well, except for the problem listed below.
I have owned a 4002 for over 10 years, which to my knowledge is identical in most way to the 4004, and have completed small repairs. In particular I’ve worked on the tonearm mechanism, which seems to be the problem area on the 4004.
—
The Problem:
At a high level, the tonearm is not dropping.
After pressing START, everything fires up and the tonearm moves as expected, but the solenoid doesn’t engage with enough force to move the tone arm mechanism and drop the arm.
It appear that the solenoid engages, but doesn’t have enough force to move Arm A (service manual image attached). The solenoid piston and arm actuator move a small amount, sort of popping out then right back in. I have a video of this here:
link
If I remove Spring E, which puts tension on Arm A, the actuator fully extends, and the tonearm drops as expected. Of course this leaves the tonearm down, so was just a troubleshooting idea I tried. Video here without the spring:
—
Work done so far:
I have dismantled, cleaned, and lubricated the tonearm mechanism following instructions form beolover here:
I’m seeking advice on repairing a Beogram 4004 that a I recently purchased. The unit appears to be in vey good condition, and as far as I can tell is functioning well, except for the problem listed below.
I have owned a 4002 for over 10 years, which to my knowledge is identical in most way to the 4004, and have completed small repairs. In particular I’ve worked on the tonearm mechanism, which seems to be the problem area on the 4004.
—
The Problem:
At a high level, the tonearm is not dropping.
After pressing START, everything fires up and the tonearm moves as expected, but the solenoid doesn’t engage with enough force to move the tone arm mechanism and drop the arm.
It appear that the solenoid engages, but doesn’t have enough force to move Arm A (service manual image attached). The solenoid piston and arm actuator move a small amount, sort of popping out then right back in. I have a video of this here:
link
If I remove Spring E, which puts tension on Arm A, the actuator fully extends, and the tonearm drops as expected. Of course this leaves the tonearm down, so was just a troubleshooting idea I tried. Video here without the spring:
—
Work done so far:
I have dismantled, cleaned, and lubricated the tonearm mechanism following instructions form beolover here:
