To All,

I finally found the book where the DX7 test procedure is given. Here is :

1 - press simultaneously FUNCTION + 16 + 32 to enter into test mode
2 - "Test mode entry. Are you sure ?" : YES
Then, you will have 11 self-tests. To go to next test, press "YES".

3 - "Test 1 Level Adj VR3" : produces a 440 Hz sine.
4 - "Test 2 Display test" : lights on all the LED digits and the LCD pixels.
5 - "Test 3 Sw 1" : you'll be required to press all the switches.
. Sw 1 -> Sw 32 = Numeric switches 1 to 32
. Sw 33 = Store
. Sw 34 = Internal Memory Protect
. Sw 35 = Cartridge Memory Protect
. Sw 36 = Operator Select
. Sw 37 = Edit/Compare
. Sw 38 = Internal Memory Select
. Sw 39 = Cartridge Memory Select
. Sw 40 = Function
. Push sustain = depress the pedal in the sustain switch
. Push portamento = depress the pedal in the portamento switch
6 - "Test 4 Kbd" : you'll be asked to depress each key. Follow the display.
7 - "Test 5 A/D" : Analog/digital converters.
. Data Entry
. Pitch Bend
. Modulation
. Expression pedal
. Breath control
. After touch
*** WARNING ***
The next test will erase your RAM. If you don't want to, switch off your
DX7.
*** YOU'VE BEEN WARNED ***
8 - "Test 6 Ctr R" : Cartridge read
- You need a special test cartridge to complete this test
- it will copy the content of the test cartridge into the RAM, and compare
the copy with the ROM.
9 - "Test 7 Ctr W" : Cartridge write
- you need a RAM cartridge to complete the test.
- The cartridge will be completely erased.
10 - "Test 8 Ctr RW" : Cartridge read/write. Speaks for itself.
11 - "Test 9 RAM" : RAM testing
Erases everything : internal RAM + RAM cartridge.
12 - "Test 10 ROM" : Check sum of the ROM
13 - "Test 11" : Plays all the notes

Note: I've read you can go from test 5 to test 11 by pressing "YES/+1"
without inserting any cartridge. You should not screwup your RAM, but I've
never tried though. I always switched off after test 5.

(procedure found in "Guitare et Clavier" #65, Jul 86)

HTH,

François