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Document revision 2.3 – Last modification : 27/05/21
MP573 Assembly guide – Main PCB, B side
2. B side
The MP573 main PCB carries components on both sides. The A side is the side with the title writing
“MP573”. We will start by the B side which holds only a few components.
3. Diodes
Add D1, D2, D5. Use a lead forming tool to bend the leads at 0.4”.
Warning
: Make sure to respect the direction of the diodes which is marked by a ring on the component
and a double line on the PCB marking.
4. Resistors
Add R4, R5, R6, R28.
Control the resistor values with a digital multimeter. Bend the leads at 0.4” with a lead forming tool.
5. Relays
Add RLY1 to RLY3. Cut the pins ultra-short.
Warning
: Make sure to respect the direction of the relays which is marked by a white line on the
component and on the PCB marking.
Warning
: Be careful to make very good solders here because later, these will be hidden by the input
transformer and thus difficult to repair.
6. LED
Bend the leads of D10 right angle at 6mm from the body
taking care of the anode position (the longest lead).Insert
from the PCB B side and solder with the leads at 2mm
from the PCB surface.
Warning
: it is easy to bend the leads in the
wrong direction !
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