Yamaha AW4416 Service Manual page 106

(2) Test Content
1) This test checks the LCD dots.
2) This is a visual test. Check that all dots blink continuously.
(3) Judgment
1) Exit-method area → blank
2) If all dots blink correctly (based on visual check):
Press ENTER to return to the test menu screen. An
the next test in the menu.
3) If the result is NG or if you wish to stop the test before completion:
Press CANCEL . The program returns to the test menu screen, and an NG appears in the left column. The cursor
does not advance.
5-2-4 FL Segment Test (04 FL)
(1) Display (Test Screen Type A)
1) Test name → FL
(2) Test Content
1) This test checks that the FL segments light up correctly.
2) This is a visual test. Segments first blink in order, and then all the segments come on solid. Confirm that all of the
segments light up.
(3) Judgment
1) Exit-method area → OK: [ENTER], NG: [CANCEL]
2) If visual check shows that operation is normal:
Press ENTER to return to the test menu screen. An
the next test in the menu.
3) If the result is NG or if you wish to stop the test before completion:
Press CANCEL . The program returns to the test menu screen, and an NG appears in the left column. The
cursor does not advance.
5-2-5 MAIN CPU ⇔ REC CPU Communication Test (05 DPRAM)
(1) Display (Test Screen Type D)
1) Test name → DIAGNOSTIC for DPRAM (MIX <-> HDR)
(2) Test Content
1) Runs a DP-RAM R/W test to check communication between the MAIN CPU and the REC CPU.
2) Tests the MAIN CPU bus, REC CPU bus, and interrupts.
(3) Judgment
1) Results area
Exit-method area
2) If the results area shows that all test results are OK:
Press ENTER to return to the test menu screen. An
the next test in the menu.
3) If a check returns an NG:
Checking R/W ... NG
NG message →
a) Write and Read values did not match. A "0" indicates that the bit matched; an "X" indicates a mismatch.
b) If all bits are "X", there is a problem with the CS or the Address bus.
c) If only one bit is "X", there is a problem with the Data bus.
→ Checking R/W
...**
→ Checking MIX CPU <-> HDR CPU ...**
→ EXIT: [ENTER / CANCEL]
NG message
MSB LSB
0XXX XXXX
appears in the left column, and the cursor advances to
appears in the left column, and the cursor advances to
appears in the left column, and the cursor advances to
AW4416
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