KLM-367A replacement board

About cKLM-367A replacement board for Korg Polysix synthesizer

Battery leak of an original NiCd battery in Korg Polysix synthesizer on programmer board KLM-367A (shortly 367A) causes corrosion of vias, parts’ mounting holes, electric traces and electronic components (caps, ICs, transistors and so on). Metal parts are covered with white oxides and blue-green salts. Corroded metal can’t conduct anymore, so part of programmer board fails and it is not possible to program sounds. 367A board provides besides other things Control Voltages for synthesizer blocks as VCO, VCF, VCA.

It is a very hard job to repair a PCB affected by battery corrosion. It is necessary to restore all affected traces, mounting holes, vias and to find not working parts (especially ICs).

Another solution is to use a cloned 367A, that’s why the name cKLM-367A. It is almost identical copy of an original 367A board. The parts are located on the same place and the board uses the same types of parts. The schematic of the circuit is as original one. That means the functionality is the same.

cKLM-367A uses some hard to find parts. These are original connectors, IC22 (MCU 8048-345) and Q3 (transistor pair 2SA798). It is possible to transplant these parts from old 367A into the new PCB, but sometimes it is not possible. For example they are missing or they are faulty. For this case we offer replacement parts. This listing consists of four variations, see below. Some variations offer replacement parts.

One picture in gallery shows comparison between old and new PCB.

367a_18367a_15367a_12367a_11367a_10367a_09367a_08367a_06367a_01MCU


FOR SALE

  • 1x new cKLM-367A clone board (four variations are available)
  • cKLM-367A is a drop in replacement for the old, original KLM-367/367A board
  • Regardless of a purchased variation you always will get a calibrated, tested board with factory sounds BANK A
  • MCU replacements are from NEC or Intel

VARIATION 1: original connectors & w/o 8048-345 clone

  • Customer must send to us an original 367A board (address is written below in “business seller information”)
  • We transplant original connectors, IC22 and Q3 into a new cKLM-367A board. IC22 must be in working condition. Then we calibrate and test new board.
  • We ship finished cKLM-367A board to our customer
  • Variation’s 1 benefits: uses original stable connectors, customer shouldn’t care about de/soldering

VARIATION 2: original connectors & with 8048-345 clone

  • Customer must send to us an original 367A board (address is written below in “business seller information”)
  • We transplant original connectors and Q3 into a new cKLM-367A board. We use our own IC22 (MCU 8048-345). Customer doesn’t need to ship us an 8048-345.
  • Then we calibrate and test new board and ship it to our customer.
  • Variation’s 2 benefits: uses original stable connectors, customer shouldn’t care about de/soldering, original 8048-345 MCU isn’t available (is missing or is faulty/too corroded)

VARIATION 3: pin headers & w/o 8048-345 clone

  • This variation uses common pin headers instead of original male connectors. Pin headers are already mounted on the new PCB. Customer has only to use (original and) fully operative IC22 and Q3 or get it from somewhere else. After installing of these parts the cKLM-367A will work fine. Customer has to install these parts by oneself.
  • Probability an old IC22 is working: >95%. Probability an old Q3 is working: >99,5%.
  • Pin headers fit well into female connectors in Polysix.
  • Variation’s 3 benefits: not necessary to ship an old 367A to us. This reduces delivery time in comparison to variations 1&2.

VARIATION 4: pin headers & with 8048-345 clone

  • This variation uses common pin headers instead of original male connectors. Pin headers are already mounted on the new PCB. Customer has only to use original and fully operative Q3 or get it from somewhere else. After installing of this part the cKLM-367A will work fine. Customer has to install these parts by oneself.
  • Probability an old Q3 is working: >99,5%.
  • Pin headers fit well into female connectors in Polysix.
  • Variation’s 4 benefits: not necessary to ship an old 367A to us. This reduces delivery time in comparison to variations 1&2. Customer gets fully working MCU.

After purchasing of Variation 1 or 2 customer has to ship an old 367A board to us.
Use the address that is written below in “business seller information”.
We need a tracking number to track your parcel!
Turnaround 1 or 2 working days starts after receiving of your package with an old 367A PCB!

RECOMMENDATIONS and HINTs when replacing 367A

Be sure female connectors on 367A (or even another boards), especially CN03, 06, 08 and 11, aren’t corroded. Individual connector’s contacts are visible from the side. All of them should have nice, silver metallic colour. If they are blue-green, white or dark grey they should be cleaned or replaced.

Be sure battery leak on 367A didn’t damage neighbouring boards (368/366/369/370).

 

Prices:

V1 orig. CN, w/o MCU          209€
V2 orig. CN, with MCU         234€
V3 PH, w/o MCU                   175€
V4 PH, with MCU                  200€
only MCU                                25€

Payment via SEPA or paypal (+2…4%)
Shipping worldwide via German registered Mail incl. tracking number – 6,20€ (1 board).
Shipping throughout Germany via DHL Paket 2kg – 5,00€ (up to 4 boards)

Rechnungsstellung erfolgt ohne Ausweis der Umsatzsteuer nach §19 UStG.
Invoicing without VAT due to German §19 UStG.