Test Tips -

BPNCS Technical Consultations

1. BPNCS installation and Pickguard shielding.The shielding will reduce the high frequency noise and if it is very simple – it will not change the tone. Here is a good example about pickguard shielding: Pickguard shielding

Posted by: Ilitch
04 14 2008

2. BPNCS installation – Check Tips

Preparation: Connect all wires according to the User’s manual and installation instructions. Screw in the Backplate on its place. Put all Volume and Tone controls of the guitar on their MAX position.

Before you place the pickguard on its place please use a multimeter at resistance mode, 20 KOhms range and perform the following measurements on the Adjusting PCB wires:

a. Yellow to Red – about 0.35 – 0.4 KOhms.
b. Yellow to Green (or Black) – 0 KOhms (short)
c. Green (or Black) – Volume pot housing – 0 KOhms (short)

adjust BOTH blue trimpots to their MAX position then measure:

d1. Blue to Green (or Black) – about 0 KOhms (short).
e1. White to Green (or Black) – about 0 KOhms (short).
f1. Orange (or Brown) to Green (or Black) – about 0 KOhms (short).

adjust BOTH blue trimpots to their MIN and then measure:

d2. Blue to Green (or Black) – about 0.35 KOhms.
e2. White to Green (or Black) – about 0.35 KOhms.
f2. Orange (or Brown) to Green (or Black) – about 0.35 KOhms.

adjust BOTH blue trimpots to 12 o’clock (middle position or 50%) then measure:

d3. Blue to Black – about 2.5 KOhms.
e3. White to Black – about 2.5 KOhms.
f3. Orange (or Brown) to Green (or Black) – about 2.5 KOhms.

When You get all these readings correct you can now proceed the final step of installing the pickguard on place and later final adjust the blue trimpots for best noise cancellation.

3. BPNCS installation using RWRP Middle pickup and one TONE potentiometer. Requirements:

=The guitar has 3 pretty much same resistance Bridge, Middle and Neck pickups (let say within 1K difference)
=The guitar has a standard 5 position pickups selector switch.
=The guitar has one Volume, one Tone potentiometer.
Notes:
Negative:
With this wiring, at position 3 you will have the Middle pickup WITHOUT the BPNCS noise canceling.
Positive:
With this wiring, at position 2 and 4 you will have NOTHING connected to the operating pickups and have a standard (original) noise canceling.
With this wiring, at position 1 and 5 you will have a standard BPNCS noise canceling.
Use the proper wiring diagram to wire the guitar

When You get all these connections correctly done you can now proceed the final step of installing the pickguard on place and later final adjust the blue trimpots for best noise cancellation at position 1 (Bridge pickup only) and 5 (Neck pickup only).