TGSL v3 100mm x 100mm reduced

[BKY1337]

I think the zener diode is in the wrong direction. Which one is the right one? Scheme or layout?

Do you mean a 2k2 Resistor from Pin2 to Pin3 IC? Then i need to swap the diode and everthing is ok?

I have a 3k3 Resistor to GND in the Layout , in the lower right corner where the 220uf is.
I cannot find it in the schematic.

Do you know a good trimmer potentiometer for onboard GB? It should be very small.

This are my last three problems with the layout.

Diode, Resistor, GB-Pot

I asked for minimum Text size, they said 0.8mm.

[Toros]

""I have a 3k3 Resistor to GND in the Layout , in the lower right corner where the 220uf is.
I cannot find it in the schematic.""

It is R57=3k3
Мany people prefer a fixed ground balance(trimmer). Others want to be able to adjust the balance to the ground and put a potentiometer instead of a trimmer. A question of personal choice. If you want trimmer put a trimmer - "Piher" made.

I can not answer for the cener. I have not done exactly this circuit and I can not say how it works.

[BKY1337]

Okay, then i need to wait with the pcb order.

If R57 is 3k3 then i need to change it with a 2k2 one or let everything as it is.
Damn.

I want to use a onboard trimmer and make additonal holes for external pot.
But the regular Piher ones are way to big for this layout.
I need a trimmer which is only 5mm big.

[BKY1337]

I could mark the resistor as R57 on the board and change it later in the schematic.
And i could make an internal off-board trimmer in the enclosure.