Oberheim Matrix-6 Service Manual

Select parameter number "52 CALIBRATE". Now press and hold the C button
then press and hold the B button. The MATRIX-6 is now in HFO CALIBRATION
mode and the held buttons can be released.
Caution: when adjusting the coils of the HFO's, take care not to damaqe
the very fragile core.
When adjusting HFOs, be sure to remove adjusting tool from the core of
the coil before taking the frequency measurement.
There are three High Frequency Oscillators which need to be adjusted when
Calibrating HFO's. The adjustments are made first at L2, then L3 and last L1
Use a Frequency Counter to set the frequency of all three Oscillators between
3.500 and 3.505 MegaHZ. After L1 is set, the frequency of L2 and L3 should be
double checked to make sure they have not changed.
To adjust L2 connect Frequency Counter to pin 14 of U732.
To adjust L3 connect Frequency Counter to pin 14 of U733.
To adjust L1 connect Frequency Counter to pin 14 of U736.
After adjusting all three HFOs, exit HFO CALIBRATION mode by pressina
MASTER button. a
Note: After Calibrating the HFOs, the MASTER EDIT parameter "52
CALIBRATE11 must be preformed.
5. PROCESSOR RESET & INITIALIZE - First, make sure the AC power is
turned off. Press and hold the red STORE button. Turn the AC power on and
the display should have one or two characters flickering In the display Now
release the STORE button and the display will go blank for a few seconds
When the display resets, it will recall patch number M00". Although the unit will
display patch "00M, it will be playing the initialized patch.
POWER SUPPLY
VOLTAGE TOLERANCES J03 PIN # *
-5
+5A
+5B
+12
-12
-42
* J03 is the connector located on the Power Supply board.
" The -42 volt supply is measured on the noncomponent side of the Display
Board, at the point labeled "-42", located directly behind the fluorescent d' play.
MATRIX-6 Service Manual
ECC / Oberheim - Los Angeles, CA 90064 • Par! U 950060 Page 3

Oberheim Matrix-6 Specifications

General

Polyphony	6 voices
Oscillators	2 DCOs per voice
Keyboard	61 keys
Memory	100 patches
MIDI	Yes
Type	Analog
Year Released	1985
Envelopes	3