Yamaha DTXPRESS IV Service Manual page 22

DTXPRESS
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C-05. LCD
[Test code]
05
[Initial indication]
5 LCD
[Test content]
Check dots of LCD visually.
[Test method]
Press the [SAVE/ENTER] key to execute the test.
Execute the C-04.MIDI test. If its result is OK (Refer to
[Completing the test].), testing is started automatically.
Check that dark and light segments flash alternately.
[Check item]
Check visually that LCD flashes.
[Indication of judgment result]
None
[Content of FAIL judgment]
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None
[MIDI code output of judgment result]
A0 05 01
(This code is output after the LCD is turned on.)
[Completing the test]
5 LCD
[ENTER]
When the result is OK and indication is provided as shown above,
press the [SAVE/ENTER] key, and [A0 05 02] is output from
MIDI OUT and testing proceeds to the next test.
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C-06. LED
[Test code]
06
[Initial indication]
6 LED
[Test content]
Check that LEDs light properly.
[Test method]
Press the [SAVE/ENTER] key to execute the test.
Execute C-05.LCD test. If its result is OK (Refer to [Completing
the test].), testing is started automatically.
Check that corresponding LEDs light in the following order.
Click lamp LEFT (RED) → Click lamp RIGHT (GREEN) →
DRUM KIT (GREEN) → CLICK (GREEN) → SONG (RED)
→ SONG (GREEN) → ON/OFF (GREEN) → SAVE/ENTER
(GREEN) → SONG (RED)
[Check item]
Check that LEDs light in the above order. Check visually that
lighting of LEDs is not excessively dim.
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[Indication of judgment result]
None
[Content of FAIL judgment]
None
[MIDI code output of judgment result]
A0 06 01
(This code is output after all LEDs light up.)
[Completing the test]
6 LED
[ENTER]
When the result is OK and indications provided as shown above,
press the [SAVE/ENTER] key, and [A0 06 02] is output from
MIDI OUT and testing proceeds to the next test..
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