SSSR Labs SM042 Assembly Manual Download Page 17

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SM042, Assembly Manual

PCB Version 1.2

Step 16: Centering the FM and WM Potentiometers

Set the module to the settings shown on the left picture.

Module will sound like a kind of siren. Find the position of the FM shaft where fre-

quency modulation is negligible or disappears completely. This is the mid-point for the

FM control. Outline the pointer line on this shaft.

Repeat this procedure with the WM shaft. The initial position is shown on the right

picture. The mid-point can be found using the similar procedure as for the FM shaft.

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Summary of Contents for SM042

Page 1: ...050 220 220 1 uF 332J100 20 000 TL074CN TL074CN TL074CN CD4011BE CD40106BE TL072P TL072P TL072P LM393P LF 442CN SSSR Labs MCU Chip KOTELNIKOV 1 2 CD4042BE KP590KH5 AD7545A SM042 Assembly Manual PCB Ve...

Page 2: ...th boards but pin header connectors and couple of aluminium capacitors are have to be soldered to the bottom side The order of assembly briefly can be described like that Install SMD components small...

Page 3: ...ately aligned to its footprint then solder pins according to the order given in the picture above The pin 4 heatsink will require long heating up Don t worry about the overheating this component is de...

Page 4: ...mall Signal Diodes Find the thinnest components a silicon small signal diodes Notice the polarity The black stripes indicating the cathodes must correspond with stripes on the PCB Solder all diodes to...

Page 5: ...above picture as the reference to verify values before soldering Flip the PCB over trim the pins and reflow and solder everything to the bottom side This technique is the best method to accurately and...

Page 6: ...left but there are chips with other directions marked by blue areas in the picture These sockets are very slippy so it s practical to gently bend their pins towards each other to help them fixate in...

Page 7: ...ersion 1 2 Step 6 Bypass Capacitors Install and solder the 100 nF bypass capacitors labelled as 104 There are total of 21 of them In some early kits the MuRata ceramic capacitors was replaced with Epc...

Page 8: ...o types of notation for a capacitor value Style 1 3 digit The first two digits should be read as they are and then you need to add as much zeroes as are indicated by the third digit and interpret this...

Page 9: ...e Then install rectifier diodes and aluminium capacitors All of those are all polarized components As with the small signal diodes cathodes of the rectifier diodes are marked with stripes on diodes an...

Page 10: ...ing the correct polarity Anodes are indicated by the sign on the board and the longer pins Remove the film from the front panel if there s any and install the panel onto the board through the switches...

Page 11: ...ll connectors on the bottom side of Board 1 then construct a sandwich out of both boards as shown on the picture Solder all headers ensuring that all con struction is clamped tight and secure Insert e...

Page 12: ...nded to solder two pins in the opposite corners then solder the remaining pins The six pins from 3 to 8 are connected with the ground plane and require extra heating It is also recom mended to plug th...

Page 13: ...D4042BE KP590KH5 AD7545A SM042 Assembly Manual PCB Version 1 2 Step 12 Potentiometers Switches Jack Sockets Install all potentiometers toggle switches and jack sockets without washers and nuts Also if...

Page 14: ...Front Panel Put on the panel back to its place Since you do not longer need access to the top side of the Board 2 you can put on and tighten all washers and nuts Solder everything It is advisable to c...

Page 15: ...onding knobs Look over the module one more time and check everything you can Set the module to the settings pictured above Connect the power turn on your system and make sure that DRUID indicator is o...

Page 16: ...pointer lines on the Wave AM Attack and Decay shafts Set the module to the settings pictured above Monitor the output frequency with an oscilloscope frequency meter tuner or your ears and turn the Pit...

Page 17: ...of siren Find the position of the FM shaft where fre quency modulation is negligible or disappears completely This is the mid point for the FM control Outline the pointer line on this shaft Repeat th...

Page 18: ...o the position shown on the left picture then install each knob one at a time keeping it in the correct position You may also put the edge of a business card or other object of similar thickness under...