Yamaha DME4io-ES Service Manual page 57

2-4. When the test is started
Word clock and signal fl ows are as follows when the test is started.
Model WORD CLOCK
DME4io-ES Cobra 96 k
DME8i-ES Cobra 96 k
DME8o-ES Cobra 96 k
The fl ow of DME Satellite at FS=48 kHz during AD/DA test is as follows, not as in the above.
When the Fs is 48 k/96 kHz during AD test/DA test
Model WORD CLOCK
Cobra 48 k
DME4io-ES
Cobra 96 k
Cobra 48 k
DME8i-ES
Cobra 96 k
Cobra 48 k
DME8o-ES
Cobra 96 k
During AD test/DA test when inspecting AD circuit board/DA circuit board
Model WORD CLOCK
DME4io-ES Cobra 96 k/48 k INPUT1-4 → OUTPUT1-4
3. Test items
3-1. SRAM test (NO. 01)
Contents: Checks Address Bus and Data Bus of SRAM.
Example of Executing Screens
*** 01. SRAM
SRAM AddressBus
SRAM DataBus
EXIT:[ENTER]
*** 01. SRAM
SRAM AddressBus
SRAM DataBus
EXIT:[ENTER]
Messages
• When address bus access abnormality is detected:
• When data bus access abnormality is detected:
Troubleshooting
Check for malfunction of SRAM (CPU circuit board: IC009) and connection between the SRAM and CPU (CPU
circuit board: IC002).
Note
If the SRAM test is executed, contents of the SRAM will be 0 cleared.
After executing this test, execute "Initialize DME" (see page 116) to initialize the DME Satellite.
Flow of audio signals
INPUT1-4 → ETHER SOUND OUT 1, 3, 5, 7 (Double Speed)
ETHER SOUND IN 1, 3, 5, 7 (Double Speed) → OUTPUT1-4
INPUT1-8 → ETHER SOUND OUT 1, 3...13, 15 (Double Speed)
ETHER SOUND IN 1, 3...13, 15 (Double Speed) → OUTPUT1-8
Flow of audio signals
INPUT1-4 → ETHER SOUND OUT 1, 3, 5, 7
ETHER SOUND IN 1, 3, 5, 7 → OUTPUT1-4
INPUT1-4 → ETHER SOUND OUT 1, 3, 5, 7 (Double Speed)
ETHER SOUND IN 1, 3, 5, 7 (Double Speed) → OUTPUT1-4
INPUT1-8 → ETHER SOUND OUT 1/2, 3/4...13/14, 15/16
INPUT1-8 → ETHER SOUND OUT 1, 3...13, 15 (Double Speed)
ETHER SOUND IN 1, 3...13, 15 → OUTPUT1-8
ETHER SOUND IN 1, 3...13, 15 (Double Speed) → OUTPUT1-8
Flow of audio signals
***
OK!
OK!
***
NG!
NG!
DME4io-ES/DME8i-ES/DME8o-ES
[Example]
Analog
Input 1
to
Input 4
Input 5
to
Input 8
Indicated in case of OK
Indicated in case of NG
NG: SRAM AddressBus NG.!
NG: SRAM DataBus NG.!
ES OUT NAI48
AES/EBU 1
1/2
1ch/2ch
AES/EBU 1
7/8
7ch/8ch
ES OUT AES/EBU 2
9/10 1ch/2ch
ES OUT AES/EBU 2
15/16 7ch/8ch
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