Yamaha AW2816, Service Manual

Page: 67 / 120

AW2816
67
(2) Judgment
1) If all the test results are “OK”
Press the
ENTER
key. The test menu will reappear
with displayed to the left of the test item (TO
HOST), and the cursor advances to the next test in
the menu.
2) If the following NG messages appear:
•
MAIN Tx/Rx
→
Signal error with TX1 (pin 17), RX1
(pin 16) of SIO4 (IC604)
•
CLOCK
→
Signal error with TX2 (pin 21) of SIO4
(IC604)
•
REC Tx/Rx
→
Signal error with TXD1 (pin 47), RXD1
(pin 48) of REC CPU (IC703)
Press the CANCEL key. The test menu will reappear
with NG displayed to the left of the test item (TO
HOST). The cursor does not advance.
4-13 MIDI Function Test (13 MIDI)
“=== MIDI ===” is displayed on the LCD.
(1) Test Content
1) Checks the MIDI interface and MTC functions.
(2) Judgment
1) Operation instruction
q
First, MIDI check is performed, and the following
message will appear.
---
MIDI CHECK ---
MAKE TEST LOOP AND PRESS ENTER
Check whether the [MIDI IN] and [MIDI OUT/THRU]
connectors on the instrument are connected with a
MIDI cable.
Press the
ENTER
key. MIDI check will be performed
and the check result will be displayed.
Operation instruction
w
Next, MTC check is performed, and the following
message will appear.
---
MTC CHECK ---
MAKE TEST LOOP AND PRESS ENTER
Disconnect the MIDI cable from the [MIDI OUT/
THRU] connector, and connect it to the [MIDI MTC
OUT] connector that is located to the left of the [MIDI
OUT/THRU] connector.
Press the
ENTER
key. MTC check will be performed
and the check result will be displayed.
2) If both test results are OK:
Press the
ENTER
key. The test menu will reappear
with displayed to the left of the test item (MIDI),
and the cursor advances to the next test in the menu.
3) If one or both of the test results are NG and the
following message appears:
•
MIDI Tx/Rx
→
Signal error with TX0 (pin 15), RX0
(pin 14) of SIO4 (IC604)
•
THRU SELECT
→
Signal error with Port E8 (pin 106)
of MAIN CPU (IC501)
Press the CANCEL key. The test menu will reappear
with NG displayed to the left of the test item (MIDI).
The cursor does not advance.
4-14 Word-Clock I/O Test (15. W.CLK I/O)
“=== W.CLK I/O ===” is displayed on the LCD.
(1) Test Content
1) Checks the word-clock generator functions (crystal
OSC, VCI, I/O).
(2) Judgment
1) If all the test results are “OK”
Press the
ENTER
key. The test menu will reappear
with displayed to the left of the test item (W.CLK
I/O), and the cursor advances to the next test in the
menu.
2) If the following NG messages appear:
•
48k INTERNAL CLOCK
→
Oscillation error with 48K
work clock
(X602 is defective)
•
44.1k INTERNAL CLOCK
→
Oscillation error with
44.1K work clock
(X603 is defective)
•
48k 0% VARI
→
48k oscillation error
(VCO49 or IC610 is defective)
•
48k +7% VARI
→
48k+7% oscillation error
(VCO49 or IC610 is defective)
•
48k -7% VARI
→
48k-7% oscillation error
(VCO49 or IC610 is defective)
•
44.1k 0% VARI
→
44.1k oscillation error
(VCO45 or IC609 is defective)
•
44.1k +7% VARI
→
44.1k+7% oscillation error
(VCO45 or IC609 is defective)
•
44.1k -7% VARI
→
44.1k-7% oscillation error
(VCO45 or IC609 is defective)
•
WC I/O (48k INT)
→
Signal error with ALRCK or
WCKIN
Press the CANCEL key. The test menu will reappear
with NG displayed to the left of the test item (W.CLK
I/O). The cursor does not advance.