Grundig radio 1957 model 3088 (Algemeen)

door Pandu Rajan , 06.10.2016, 10:36 (2972 dagen geleden) @ Pandu Rajan

Dear friends

Now I am facing this problem in the above set.
All the bands are working correctly. But even with the volume control at minimum position the actual volume is quite high. Specially in case of the FM band this is too high. Before I do further checking I have some queries to ask.

1. On The radio set there are 4 potentiometers for the tone control and one for the volume control. But the schematic shows 6. Which is this sixth one?
2. As the schematic is in German language and no component layout drawings I am unable to distinguish the various potentiometers.
3. The pots. are as follows:
a. R50 - 1K - 1.8Khz
b. R51 - 1K - 3.5Khz
c. R42 - 100K - B
d. R31 - 5M - B
e. R34 - 2M - L
f. R30 - 5M - H

I Presume that R34 is the volume control but unable to distinguish the others?
What is the use of the switch "S" and where it is located?
I presume the switch "FA" is used to connect/ disconnect the internal antenna for the AM bands. Is it correct? Is it operated by the big Knob on the left side?
I shall be grateful if somebody can help me in solving above problem.I am asking these questions because the component layout drawings of the above radio set are not available.

Regards

P.Rajan