Yamaha DME24N, Service Manual

Page: 115 / 289

DME24N/DME64N
115
1-23. PANEL LED Test
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Content: Perform tests limited to LED-scan lines for
LEDs and 7-seg LEDs on the panel. An LED on each
LED-scan line is randomly selected, lighting on in the
order of Line 0, 1 . . . and 5.
LCD Screen
q
The following LEDs light on one by one according
to the model.
● DME24
EXT. CLOCK (Line 0) → NETWORK (Line 1) →
SIGNAL IN (1) (Line 2) → PEAK OUT (4) (Line 4)
→ SIGNAL-OUT (8) (Line 5) → 7-seg (a) (Line 3)
→ 7-seg (c) (Line 4) → 7-seg (f) (Line 5) → 7-seg
(dp) (Line 3) → 7-seg (dp) (Line 5)
● DME64
EXT.CLOCK (Line 0) → NETWORK (Line 1) → 7-
seg (a) (Line 3) → 7-seg (c) (Line 4) → 7-seg (f) (Line
5) → 7-seg (dp) (Line 3) → 7-seg (dp) (Line 5)
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LEDs that can light with more than one colors light
in the order of “green” → “red” → ”orange” (with no
orange when two-colored).
e
When all LEDs have lighted on, all of them brink
five times in one second interval, and then all light
on, which makes the completion of the test.
(All light on to confirm the LEDs’ brightness.)
EXIT: [ENTER]
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23.
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PANEL LED-2
Fig. 44. PANEL LED Test Screen
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1
4
2
3
5
Fig. 45. 7 Lighting Sequence of Seg-LEDs
1-24. HAAD DA REG Test
Content: Check HAAD and DA registers of DME24N.
Executing Screen
Message
· When the name (DME24N_HA-AD) is wrong:
NG: CARD NAME ERROR!
· When information on card condition fails to be
obtained:
NG: CARD CONDITION READ ERROR!
1-25. ANALOG IN/OUT Test
Content: Output signals input in HAAD to DA, and
check the output signals.
Details of Setting Values
The number of items examined varies according to
exam categories.
q
Total Test
The tests will be performed with the following 9 setting
values.
Fig. 46. HAAD DA REG Test Screen (2)
1
2
3
4
5
6
7
8
9
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
10dBu
-60dBu
-17dBu
-37dBu
-46dBu
10dBu
10dBu
10dBu
10dBu
96k
96k
96k
96k
96k
96k
48k
(96k+6%)
(44.1k-10%)
INT
INT
INT
INT
INT
INT
INT
EXT (BNC)
EXT (BNC)
HA-GAIN Test No WORDCLOCK Fs PHANTOM
OK !
NG: CARD NAME ERROR !
EXIT: [ENTER]
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24.
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HAAD DA
Indicated in case of O.K.
Indicated in case of NG.