Pioneer WD Series, Service Manual

Page: 39 / 40

38
below:
A\ Pre-tightening → ① ②
B\ Final tightening →
① ②
Figure Recommended Tightening Sequence for Screws
Other cautions: As the module is a precious and expensive element, never keep the new module
close to magnetic object or touch the module with electrostatic object (including direct touch with
your finger). Especially, touch with the port of signal terminal is easy to cause module internal
breakdown and results in failure to use. If possible, you may wear electrostatic ring or glove.
2. Directive for Replacement of
Power factor correction
1) Insulation paper must be attached between power diode, IGBT, rectifier and radiating fins.
The screw locking torque is 7±0.5kgf.cm. Do not loosen the insulation paper after attaching
it fully flat onto the radiator. To retighten after loosening, it is needed to eliminate the
aluminum scraps on the radiator before retightening.
2) It is also needed apply the thermal grease evenly when replacing and installing the PFC
with radiating substrate.
3. Directive for Replacement of Outdoor Power Source Board
1) The outdoor control is mostly the components carrying high current. The controller is
designed of partial isolation and many circuits are commonly grounded with the high current.
Take care on human safety.
Insulation paper