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Document revision 1.1 – Last modification : 21/04/08

PSL1 Assembly guide

22. Single heatsink assembly

Place a drop of thermal compound on the heatsink front face, the volume of a grain of 

rice. The back face can be identified by the countersunk hole.

Next place the mica insulator.
Place a second drop of thermal compound on the mica insulator.

Insert the M3x10 countersunk screw from the back, the LM317 regulator and the 
Insulating shoulder washer.

Place the M3 nut and tighten all together.
Use your digital multimeter in the Ohm position to check that there is no connection 
between the heatsink and the center pin of the regulator.

23. Dual heatsink assembly

Repeat the same operations for the two regulators of the dual heatsink.
LM317 on the left,

TL783 on the right.

24. Case assembly

Assemble the front plate and the two sides of the case with four 
black M4 countersunk srews.
The internal face of the sides is the one with a single groove.

25. Transformer plate assembly

Place two M3x6 pan head screws with two nuts on the transformer plate 
and slide it into the right side of the case.

Copyright ©2008 SoundSkulptor

M3x10 screw

Heatsink

Thermal compound

Mica

insulator

Regulator

Shoulder

washer

Nut

Summary of Contents for PSL1

Page 1: ... is always taller than the previously assembled ones and it is pressing nicely against the work area foam PSL1 Assembly guide 1 Diodes Add D1 to D4 D6 to D8 D10 to D13 Use a lead forming tool to cleanly bend the leads at 0 4 except for D11 which is bent at 0 5 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 2 ...

Page 2: ...lder the other pins 8 Small electrolytic capacitors Add C3 C4 C7 C8 C12 Solder one lead first adjust verticality then solder the second lead Warning The lead must go into the hole Do not reverse they may explode 9 C13 Add C13 but lay it down horizontally on the board as shown on the photograph This is because it is high and will be in the way when we will be screwing the regulator heatsinks later ...

Page 3: ...by the latching pin on the PCB 11 115 230V Selector switch Add SW2 12 Fuse holder Add the fuse holder 13 Bridge rectifiers Add BR1 BR2 BR3 Warning Make sure to respect the direction of the bridge rectifiers It is marked by and signs 14 Medium size electrolytics Add C9 C10 C11 15 XLR Socket Add CN1 The position of the socket is critical for a good backplate matching It must sit flat on the PCB Pres...

Page 4: ...connector into the back plate 19 Case connection Insert an M3x10 screw into the backplate Add a shakeproof washer a solder tag and finally a self locking nut Tighten together 20 Backplate mounting Put the backplate in place by inserting the IEC connector pins into the PCB and by fitting the XLR in the plate cutout Secure the XLR with two 2 9x9 5 self taping screws Solder the IEC connector pins aft...

Page 5: ...Use your digital multimeter in the Ohm position to check that there is no connection between the heatsink and the center pin of the regulator 23 Dual heatsink assembly Repeat the same operations for the two regulators of the dual heatsink LM317 on the left TL783 on the right 24 Case assembly Assemble the front plate and the two sides of the case with four black M4 countersunk srews The internal fa...

Page 6: ... grooves of both sides of the case for a total of 8 nuts They will be used to attach top and bottom covers 28 PCB insertion Insert the PCB into position by sliding the heatsink screws into the case grooves Make sure the LEDs fit into the front plat holes 29 Back plate assembly Attach the back plate with four M4 countersunk srews 30 PCB fixing Attach the PCB to the transformer plate with 2 M3x6 pan...

Page 7: ...Insert two 15mm pieces of heatshrink tube on the wires Solder the wires to the power switch Shrink the tubes on the switch pins with a heat gun 34 Switch fixing Insert the switch into the front plate and plug in the connector 35 Transformer fixing Attach the transformer The nut should be tightened to prevent any transformer movement but without crushing the windings Plug in the transformer connect...

Page 8: ...h the help of the bottom cover position the fixing nuts in front of the holes Place the mylar insulating sheet on the bottom of the PCB Place the bottom cover and secure it with 4 black screws Place the top cover and secure it with 4 black screws Stick the four self adhesive rubber feet on the bottom of the case 38 Congratulations you re done Copyright 2008 SoundSkulptor ...

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