Secondary Diode (D2-D7) - Thermal Arc ARCMASTER 300 AC/DC Service Manual

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300ACDC MAINTENANCE
5) Remove two screws and remove the PCB22 unit.
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6) Remove the six screws and 14 terminals. Remove the two screws and then detach the primary diode (D1).
 Before installing a new diode, apply a uniform coat of silicone compound (Shinetsu Silicone G-747 or
equivalent) on the base.
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3.32 Secondary Diode (D2-D7) 
1) Remove the Side Panel. [Reference page : 11-1]
2) Remove the PCB16 (WK-5569). [Reference page : 12-16]
3) Remove the PCB15 (WK-5606). [Reference page : 12-15]
4) Remove the 30 screws and four terminals. Remove the bus bar.
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