Beomaster 2000 Type 2801: Installing the new dial pointer

The Beomaster 2000 Type 2801 restoration project left off waiting for a new dial pointer.
The original dial pointer was broken so I had to find a replacement.  Fortunately for me Martin of Beoparts happened to have a spare.

Here is what the back of the original dial pointer looked like where the dial pointer lamp attaches.
The wedge base type lamp appears to have the glass wedge part broken off and the leads wrapped around some plastic tabs of the holder, then soldered to the wires that supply power.
The cavity where the lamp is installed is filled with some sort of glue.

The replacement dial pointer is similar but does not have glue inside where the lamp fits.
The installation for a lamp in this assembly is to unbend the wires on the lamp wedge base and solder them to the two power leads.

I didn't really like that method so I started my lamp installation by first soldering two extension wires (the blue wires in the photo below) on the the power leads.

My plan is to next, install a lamp mount/holder that I "borrowed" from a Beomaster 4400 spare parts unit.  The lamp holder from the Beomaster 4400 has contacts for a wedge base style lamp to plug into.
It also has a small slot under the lamp slot for a mounting tab to slide into.  Hopefully I can figure out a modification to use it.

With a lamp holder any future lamp changes for the dial point will not require any soldering.

Here is the new 12V, wedge base style lamp in the lamp holder...ready to be inserted into the dial pointer frame.

Here is the lamp assembly installed into the dial pointer.  For now I will not secure it and leave it loose while I figure out how to add a mounting tab to the assembly.  I hope to avoid having to secure the lamp assembly with glue the way the original was mounted.  The mounting tab like the Beomaster 4400 uses is much cleaner.

...and here is the Beomaster 2000 turned on with the new, illuminated dial pointer.

Beomaster 4400 Type 2419: Getting the FM tuner working

Power is good on this Beomaster 4400 now.  I have tested the Tape 1 and Tape 2 source inputs.  Now I can work on reinstalling the FM boards.

The first thing I will do is check if the FM boards have any power to ground short circuits. There were two traces burned up on the main board (PCB5) that involve ground and the +15VDC regulator. I am concerned those are related to the FM boards so I will test them by applying DC power to them via a bench power supply that I can regulate the current to. That way I won't let anything burn up.

First is the Stereo - Decoder board (PCB3).

No problem there.
I will move on to the IF and Tuner boards (PCB2 and PCB1 respectively).
PCB2 has both +15 VDC and +35 VDC.  I am testing with a dual 30 VDC bench supply so I will only do 30 VDC in place of the +35 VDC.

Great! No apparent power problems on the FM boards. I can reinstall them and give them a try.

The result...No FM at all from the Beomaster 4400.
Like most of the other issues with this Beomaster the problem came down to another broken wire.
Actually two wire issues with the FM tuner.
A ground wire from the main board - PCB5 to PCB6, a board on the switch rail, came loose.
Unfortunately the reattachment point on PCB5 is underneath the overhang of PCB6.  I am in no mood to disassemble the front panel to reconnect this wire.

Instead...I rewired the ground wire from the bottom side of the Beomaster.

Restoring that ground got all six of the FM preset tuning pots working again. The large, main tuning dial however was still not working.

The low side of the FM tuning pots for the six presets and the large tuning dial are supposed to tie together and connect to a leg of the 6R1 2.5KΩ trimmer. In addition there is an FM tuning voltage adjustment in the service manual to use 6R1 to set that common node to 4.6V.

I discovered that the connection of the six preset tuning pots and their connection to the 6R1 trimmer resistor did not include the main FM dial tuning pot. That trace must have a break in it but I could not see it.

As with the ground wire issue this problem would require another disassembly of the front panel. I did not want to do that so I used a jumper wire to fix the broken connection.

Now that the missing wires were fixed I could make the FM tuner upper and lower voltage adjustments per the service manual.

First the upper tuning voltage.  It is made with the main tuning dial all the way to the right.

That is followed by the lower tuning voltage adjustment. It is performed with the main tuning dial all the way to the left.

Finally, all of the FM tuning dials work....as do the signal strength and stereo indicator lamps.

Beomaster 2400 Type 2902: Recapping the tone control board and FM tuner

To wrap up the capacitor replacement on this Beomaster 2400 restoration there is just one capacitor in the FM tuner box and a handful of capacitors on the tone control board.

The FM tuner box has top and bottom lids that must be removed. There is a shield wire that must be desoldered from the bottom lid before it can be opened. The bottom lid is necessary to desolder the lone 10uF capacitor leads.

Under the top lid we can find the capacitor that will be replaced.

...and here is the recapped version

The last board to recap is the control board for the tone controls and FM tuning. There are just ten capacitors to replace.  Here is the before and after picture.

I am not finished with this tone control board yet. The next task is to remove the Bass, Treble and Balance slide control devices to rebuild them.