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DR-770
TEST MODE
CAUTION : When running a test item (RAM check) in the test
mode the backup data in the mainframe will be erased.
Be sure to seve the data before running this test.
To save the data refer to "DATA SAVE AND LOAD".
Required Items
· Monitor speakers or Headphones,
· MIDI cable
· FS5U× 2 (Polarity switch setting is Jack side)
· Oscilloscope
To enter test mode
While simultaneously pressing the [SONG] and [7] buttons, turn
the power on. The version number will appear on the LCD
display as shown below. The displayed date differs depending on
the ROM version.
This LCD display is referred to as the main screen in the
following procedures.
To exit test mode
On the main screen, press the [8] button.
The display will show "INIT?".
When initializing:
Press the [ENTER] button. The display will show "Sure?".
Press the [ENTER] button again. The display will show "Done"
and the operation will exit test mode.
When not initializing:
Press the [STOP/EXIT] button. The display will show "Aborted"
and the operation will exit test mode without initializing the
setting.
Test Items
The test mode includes the 8 tests.
0. LED check
1. Switch check
2. LCD check
3. RAM check
4. ROM check
5. MIDI check
6. FSR (Key Pads) check
7. OUTPUT check
NOTE : Each test number corresponds to the [0] to [7] keys on
numeric buttons. To begin a test, press a numeric button that
corresponds to the test number to be run.
[0]. LED check
This test checks whether the LED lights normally.
1. Press the numeric button [0] to run this test.
2. If normal, pressing the [REC] button turns on the red LED,
while pressing the [START] button turns on the green LED.
3. When pressing the [STOP/EXIT] button, the display will
show "OK".
4. Again, press the [STOP/EXIT] button to return to the main
screen.
[1]. Switch check
This test checks whether each key (except key-pads) and the
encoder (VALUE knob) are functioning.
1. Press the numeric button [1] to run this test.
The display will show as follows:
2. When pressing a button or Foot SW to be checked, the key
name will be displayed in the "
" field. At
the same time a rim-shot sound will be output from Outputs L
and R.
3. After all the buttons and Foot SW have been pressed for
checking, the test automatically enters the encoder checking.
The display will show as follows:
Turning the encoder
4. When turning the encoder clockwise (or counterclockwise),
the display shown at right in the figure above will appear.
Then when turning the encoder in the reverse direction, the
display will show "OK" if the encoder is functioning.
5. Press the [STOP/EXIT] button to return to the main screen.
[2]. LCD check
1. Press the numeric button [2] to run this test.
2. When this test is entered, all segments of the LCD will be
displayed.
3. When pressing the [STOP/EXIT] button, the display will
show "OK" (even if the LCD does not operate normally).
4. Again, press the [STOP/EXIT] button to return to the main
screen.
8
Feb. 1999
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