Beomaster 1900 Type 2904: Post Recapping Power On Test

Power can now be applied to this Beomaster 1900 unit.

Standby mode works

...and the On mode (when a source is selected) works

Here is how I arrived at this point since the last post.

I performed one key service manual voltage adjustment, 15-Volt Supply.

I performed the capacitor replacements on the Control Panel PCB.
Here are the before photos of the Control Panel recapping.

In addition to the capacitor replacement I opened the three slider controls (Bass, Treble and Balance) to inspect and clean them.

The Balance control was in great shape so it only required cleaning.

The Treble control had a broken plastic slider bridge.  It is the typical problem where the plastic piece holding the contacts in place gave way.

This is very common and the Beoparts Store carries a replacement slider bridge for this problem.

Continuing on, the Bass slide control was in great shape like the Balance slider was...so it only required cleaning.

Here is the Control Panel PCB recapped and ready for use again.

After the Control Panel tasks were done I replaced the lamps in the lamp modules.

I replaced the incandescent lamps with new incandescent lamps from Beoparts on the Volume indicator and Source Select boards as the lamps themselves make up the functionality of their respective circuits.

On the lamp panel for illuminating the slide control indicator masks, I like to change to LED lamps.
The reason for that is because the LEDs produce less heat under the plastic lenses and indicator masks.
These lamps are always on when the Beomaster is not in Standby mode and are powered by the 15 V power supply. They aren't part of any audio circuit functionality like the other lamps in the Beomaster are.

In the next post I will do some more voltage checks and will adjust the No-Signal (idle) current of the output amplifier along with a few other service manual checks. I will also connect up some Beovox speakers and see how this amplifier sounds.