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The Don Classics NV73EQ, Assembly Manual

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the DON classics

www.thedonclassics.com

NV73EQ

(ADD-ON)

ASSEMBLY GUIDE

REV: 

1:00

     © the DON classics 2015

page 1 of 20

Summary of Contents for NV73EQ

Page 1: ...the DON classics www thedonclassics com NV73EQ ADD ON ASSEMBLY GUIDE REV 1 00 the DON classics 2015 page 1 of 20...

Page 2: ...ins 3 Wire pots 4 Make ribbon cable 5 Wire to NV73 micpre 6 Place PCBs in metal work 7 Initial test 8 Attach knobs Equalise NOTE This manual assumes that you already have a fully working NV73 micpre a...

Page 3: ...NV73EQ Schematics PCB designations reference this Q Who can build this A You As long as you have patience and are thorough in your work anyone can build this add on There s not a lot to the circuitry...

Page 4: ...e PCB for ease TIPS Start with smaller parts resistors etc and work up to the larger parts Solder inline sockets for transistors on both EQ boards Fit bottom parts first on BTM PCB as there ll be less...

Page 5: ...PCBs should end up looking like this TOP PCB the DON classics 2015 page 5 of 20...

Page 6: ...TOP PCB underside the DON classics 2015 page 2 of 20...

Page 7: ...BTM PCB the DON classics 2015 page 7 of 20...

Page 8: ...BTM PCB underside the DON classics 2015 page 2 of 20...

Page 9: ...ork Fit the stopper pins in the positions shown or a bit of component leg if you have misplaced the pins Place the metal sticker over the pins remove the inner middle circle sticker NOTE For the prese...

Page 10: ...3 Wire the pots Wire pots as shown TIP A little heatshrink will keep things neat and make sure no shorts happen between connections the DON classics 2015 page 2 of 20...

Page 11: ...bon cable One at a time line up the headers correctly straight so the teeth line up is not crooked Push down with fingers until it grips and confirm all is lined up Flush or overhanging the edge a lit...

Page 12: ...r on the NV73 Cut and strip a shielded cable as shown for P 0V Cut and strip 2 wires for K 24V Place the BTM PCB roughly in place as a reference for how long the wires should be Solder wires as shown...

Page 13: ...the DON classics 2015 page 13 of 20...

Page 14: ...thing in the NV73 like normal eg Transformers Small PSU PCB Place in the pot and phantom switch use the tabbed washer and make sure they don t fall back into the unit where it will be difficult to gra...

Page 15: ...two 1inch metal standoff on the BTM PCB as shown below Secure with nut Place on the BTM PCB and feed through the wires Tighten the screws in the two green terminal blocks the DON classics 2015 page 15...

Page 16: ...48V switch Use metal 1inch standoffs for the other 2 nylon standoffs Insert the ribbon cable into the BTM PCB and TOP PCB Carefully shift the ribbon cable until the TOP PCB lines up with the standoff...

Page 17: ...ldn t short to each other or to ground a small beep when first testing is normal as the caps charge up Insert front panel carefully making sure the pot and 48V switch doesn t fall back into the unit S...

Page 18: ...V You can check on the top where 24V is marked and 0V Run some audio through the unit with EQ on and off and check that it sounds good and all controls work correctly Make sure there is no buzz or hum...

Page 19: ...so the knobs don t grib against the front panel Use a small flat head screw driver Use two at the same time for an easier way to secure the knobs evenly Use a T2 sized head screw the small grey knobs...

Page 20: ...a little jig to test units without having to root around in a lunchbox eg An EDAC attached to long wires attached to a PCB with the 15 18 gold fingers to insert to the lunchbox One source of card edge...

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