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Points to know before buying a used Matrix-12

1. Try to check the Matrix-12 yourself. If impossible, please ask the seller to check carefully for you.

2. The latest software version of the Matrix-12:

Main Software: 1.1
Cassette: 1.0
Lower Voice: 1.6
Upper Voice: 1.6

If you want to load tapes from another Matrix-12 with an updated software version, you will get the error message "WRONG VERSION NUMBER", which means it is unable to read the incoming data. So it is better to buy the latest version. But I do not know the actual differences between the different software versions. If you know, please send the info to me. Thanks!

Steps to know what version the Matrix-12 is in:

i. Press the MASTER PAGE Select Switch button.

ii. Press the PAGE 2 Select Switch button.

iii. Press the button beneath the displayed word "VERSION".

3. Steps to check if the most important elements of the synthesizer work or not:

i. Wait at least 5 minutes after power on.

ii. Press the MASTER PAGE Select Switch button.

ii. Press the button beneath the displayed word "ZONE".

iii. Select Zone 1 to 6 by pressing the number buttons above the display. Make sure the word "ROTATE" is shown in the display for each zone. If not, turn the knob beneath until "ROTATE" appears.

iv. Press the MASTER PAGE Select Switch button.

v. Press the PAGE 2 Switch Switch button.

vi. Press the button beneath the displayed words "VOICES ON/OFF". Made sure all the Voices are ON. Press the VOICES 1-6 and VOICES 7-12 Select Switch button to toggle between the Voices. If they are not ON, turn the knobs until "ON" is played for each voice.

vii. Press the TUNE PAGE Select Switch button.

viii. Press the button beneath the displayed word "ALL". The word "TUNING" should appear. For a while, "PASS" will be shown to tell you that the respective area has passed the tuning. If "FAIL" appears, it means the related area could not pass for certain voice(s) probably bacause of some bad chips. Try to repeat the above steps after a while. If the problem still exist, please ask for servicing. (There are ways to check if there are any bad chips and which ones are bad by yourself. However, unless you are experienced in electronics, it is recommended to have the synth serviced for avoiding further problems possibly caused.

4. Steps to check the displays and LED lights:

i. Press the MASTER PAGE Select Switch button.

ii. Press the PAGE 2 Switch Switch button.

iii. Press the button beneath the displayed word "SERVICE".

iv. Press the button beneath "DISP" to check the display.

v. Press the button beneath "LEDS" to check the LED lightrs.

5. Open the front panel and also the upper Voice circuit board to see if everything is in good shape that no serious damages are found on the electronic parts and circuit boards.

6. Check all the surface, especially those crucial areas affecting the overall ruggedness, to see if there are any serious damages. Matrix-12 comes with a soft material on the front panel surface that is very easy to leave scratches on it. Please be more careful in checking, packing, shipping, unpacking and settling it down. Don't place anything except very soft material on the panel!

7. Avoid any Matrix-12 with a vent inside because of tuning problems.