4-Ch Pan Mixer 137 Build Guide
Assembly Instructions
The VC Panning mixer 137 has no particular requirements not already covered in the ‘General Build Info' page except for the VU meter mounting:
The VU meters are fixed to the main PCB using two differing thicknesses of foam pads.
An outline of the VU meters is shown on the PCB and it is important that the meters are aligned when sticking to the PCB otherwise they will not fit into the panel correctly when assembling. The circular adhesive pads fit under the lower edge of the VU meters. The thicker strip pads are cut to suit and spaced to avoid clashes with the solder connections.
We suggest attaching the adhesive pads to the PCB first and then bringing the VU meters down into position.
The VU meter LEDs polarity is not identified on earlier revisions of the PCB so this photo shows their orientation by looking at their internal construction.
The solder connections to the VU meters are made using some off-cut resistor leads.
Calibration
This module requires no calibration or tuning.
PCB Parts List
| Part Number | Quantity | Value | Name | RefDes |
| 7212-745 | 4 | 10n | 10n MLCC Capacitor | C1, C2, C3, C4 |
| 7212-736 | 2 | 330p | 330p MLCC Capacitor | C5, C7 |
| 7213-109 | 2 | 47u | 47u 25V Electrolytic | C6, C8 |
| 7212-731 | 2 | 22p | 22p MLCC Capacitor | C9, C10 |
| 7212-763 | 3 | 4n7 | 4n7 MLCC Capacitor | C11, C12, C13 |
| 7213-110 | 4 | 100u | 100uF 25V Electrolytic | C14, C20, C26, C32 |
| 7212-768 | 18 | 100n | 100n MLCC Capacitor | C15, C16, C17, C18, C19, C21, C22, C23, C24, C27, C28, C29, C30, C31, C33, C34, C35, C36 |
| 7213-315 | 2 | 10u Non-Pol | 10u Non-Pol Electrolytic | C25, C37 |
| 7212-486 | 14 | 1N914 | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14 | |
| 7212-301 | 2 | Eurorack | Eurorack Power | J1, J2 |
| 1208-005 | 4 | Flex Strip 5way | J3, J4, J5, J6 | |
| 2 | Vu Meter | M1, M2 | ||
| Pot 100k Lin PCB Angle* | P1, P2, P3, P4, P5, P6, P7, P8 | |||
| Pot 100k Log PCB Angle* | P9, P10, P11, P12, P13, P14 | |||
| 7212-409 | 2 | 2N3904 | Q1, Q3 | |
| 7212-410 | 2 | 2N3906 | Q2, Q4 | |
| 7163-106 | 6 | 200k | 200k 0.25W 1% Metal Film Resistor | R1, R12, R23, R34, R89, R92 |
| 7163-075 | 12 | 10k | 10k 0.25W 1% Metal Film Resistor | R2, R9, R11, R13, R20, R22, R24, R31, R33, R35, R42, R44 |
| 7163-099 | 20 | 100k | 100k 0.25W 1% Metal Film Resistor | R3, R5, R6, R7, R14, R16, R17, R18, R25, R27, R28, R29, R36, R38, R39, R40, R75, R77, R80, R81 |
| 7163-108 | 4 | 240k | 240k 0.25W 1% Metal Film Resistor | R4, R15, R26, R37 |
| 7163-101 | 7 | 120k | 120k 0.25W 1% Metal Film Resistor | R8, R19, R30, R41, R61, R90, R95 |
| 7163-100 | 4 | 110k | 110k 0.25W 1% Metal Film Resistor | R10, R21, R32, R43 |
| 7163-078 | 2 | 13k | 13k 0.25W 1% Metal Film Resistor | R45, R54 |
| 7163-082 | 17 | 20k | 20k 0.25W 1% Metal Film Resistor | R46, R47, R50, R51, R55, R56, R59, R60, R66, R67, R71, R72, R78, R79, R84, R86, R87 |
| 7163-091 | 14 | 47k | 47k 0.25W 1% Metal Film Resistor | R48, R49, R52, R53, R57, R63, R69, R70, R73, R74, R82, R83, R85, R88 |
| 7163-112 | 1 | 360k | 360k 0.25W 1% Metal Film Resistor | R58 |
| 7163-045 | 1 | 560R | 560R 0.25W 1% Metal Film Resistor | R62 |
| 7163-051 | 3 | 1k | 1k 0.25W 1% Metal Film Resistor | R64, R91, R96 |
| 7163-114 | 1 | 470k | 470k 0.25W 1% Metal Film Resistor | R65 |
| 7163-086 | 1 | 30k | 30k 0.25W 1% Metal Film Resistor | R68 |
| 7163-095 | 1 | 68k | 68k 0.25W 1% Metal Film Resistor | R76 |
| 7163-027 | 7 | 100R | 100R 0.25W 1% Metal Film Resistor | R93, R94, R97, R98, R102, R103, R107 |
| 7163-083 | 4 | 22k | 22k 0.25W 1% Metal Film Resistor | R99, R101, R104, R106 |
| 7163-035 | 2 | 220R | 220R 0.25W 1% Metal Film Resistor | R100, R105 |
| 7212-250 | 1 | SPDT | S1 | |
| 7212-544 | 5 | TL074 | U1, U2, U3, U4, U7 | |
| 7212-599 | 3 | AS3364 | U5, U6, U8 | |
| 7212-542 | 1 | TL072 | U9 |
*See below for MOTM or MU Potentiometers
Module Parts List
| Description | Reference | MOTM Qty | MU Qty |
| Pot Sticky Pads | 7210-188 | 14 | 14 |
| 10mm M4 Spacers | 7210-186 | 7 | 7 |
| M4 x 14 Cap Head Screws | 7210-187 | 7 | 7 |
| Toggle Switch Dress Nut | 7210-196 | 1 | 1 |
| M3 x 8mm Stainless Panel Screws | 7216-151 | 4 | |
| Strip + Round Foam Pads | 1 | 1 | |
| 8-Pin IC Socket | 7212-331 | 1 | 1 |
| VU Meter LED | 7213-926 | 2 | 2 |
| 14-Pin IC Socket | 7212-332 | 5 | 5 |
| 16-Pin IC Socket | 7212-333 | 3 | 3 |
| M²Synth MU / MOTM Voltage Regulator / Interface | 7216-170 | 2 | |
| Power Lead | 7216-164 | 2 | |
| MOTM Front Panel | 7216-537 | 1 | |
| MOTM Back Panel | 7216-837 | 1 | |
| MU Front and Back Panel | 7219-537 | 1 | |
| Main PCB | 7216-037 | 1 | 1 |
| Jack Socket PCB | 7215-742 | 1 | 1 |
| Jack Socket PCB | 7215-713 | 1 | 1 |
| Jack Socket PCB | 7215-712 | 1 | 1 |
| VU Meters | 7212-900 | 2 | 2 |
| Jack Sockets | 7212-220 | 12 | 12 |
| Stereo Jack Socket | 1205-074 | 1 | 1 |
| B100k Pots Long Shaft | 7300-820 | 8 | |
| B100k Pots Short Shaft | 7300-821 | 8 | |
| A100k Pots Long Shaft | 7300-870 | 6 | |
| A100k Pots Short Shaft | 7300-871 | 6 | |
| KM20B Knobs | 7212-170 | 14 | |
| MU Knobs | 7212-169 | 14 | |
| Circuit Schematics | S-7216-037-b | 1 | 1 |
PCB Layout
(Click on image for a larger view)
There are no products in this section