Roland DR-880, Service Notes

Page: 19 / 37

19
DR-880
Test items
1.
Device check
2.
LED check
3.
SW check
4. LCD and encoder check
5.
Piezo check
6.
Volume check
7.
Foot switch check
8. Expression check
9.
MIDI and USB check
10.
Output D/A check
11.
AF Gain check
12.
Input A/D check
Entering test mode
While holding down the [KIT] and [DISPLAY] buttons, power-on the DR-880.
If the unit is operating correctly, the following display will appear.
fig.devicecheck0.eps
fig.devicecheck1.eps
Press [ENTER] to begin the first test; 1. Device check.
Press [BANK] to proceed to the next test item. Hold down [SHIFT] and press
[FAVORITE 1] to return to the preceding test item.
1. Device check
• Press [FAVORITE 1] to begin the SDRAM check. Verify that a result of
OK appears.
• Press [FAVORITE 2] to begin the FLASH check. Verify that a result of OK
appears.
• Press [FAVORITE 3] to begin the ESP check. Verify that a result of OK
appears.
• Press [FAVORITE 4] to begin the XP check. Verify that a result of OK
appears.
Press [BANK] to proceed to the next test item.
2. LED check
fig.ledcheck1.eps
Verify that all LEDs are lit.
Lit button LED color
1.
EFFECT red: 1
2.
LOOP red: 1
3.
PLAY green: 2
4.
REC red: 1
5.
FAVORITE 1 red: 1
6.
FAVORITE 2 red: 1
7.
FAVORITE 3 red: 1
8.
FAVORITE 4 red: 1
9.
TSC red: 1
fig.ledcheck2.eps
Note any inconsistency in the brightness of the left and right green LEDs.
Note any inconsistency in the brightness of the various red LEDs.
LED/LCD shock test
Drop the rear edge of the unit (marked [] in the illustration) three times from a
height of 5 cm. Then drop the front edge of the unit (marked O in the
illustration) three times from a height of 5 cm. Verify that the LEDs do not go
dark, and that there is no change in the LCD display.
fig.ledcheck3.eps
Press [BANK] to proceed to the next test item.