Yamaha ACU16-C Service Manual page 34

ACU16-C
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2. List of test items
1 FLA: READ/WRITE test of FLASH ROM
2 RAM: READ/WRITE test of DRAM
3 EEP: READ/WRITE test of EEPROM
4 DSP: READ/WRITE test of DSP5 register
5 CM1: READ/WRITE test of CM-1 HM1
6 COB: Serial LOOP BACK test of CM-1
7 USB: USB test
8 WCK: Word clock test
9 RS4: RS-485 test
10 ROT: UNIT ID select SW test
11 LED: LED lighting test
12 THR: Audio signal test
13 DAC: DA converter test
14 FST: Factory set
15 EXI: The program exits from the test mode and is restarted in the normal mode.
During inspection, the PC screen displays the contents currently being tested and the test results as shown below.
DIA>FLA
>> FLASH MEMORY TEST
OK: FLASH MEMORY TEST.......[ O K ]
DIA>RAM
>> DRAM TEST
NG: DRAM TEST........................>>>> N G <<<<
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3. Overall inspection
3.1 Connection
Windows
PC
USB RS-232C
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Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
(For example)
DME32
SLOT1
MY8-AE
AES/EBU 1 AES/EBU 2
NHB32-C (for jigs)
PRIMARY
(cross)
to
USB PRIMARY
COMPUTER
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ACU16-C
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8
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1 )
SLOT2
MY8-AE DC5V
(PC9500N)
CPU
circuit board
(AAX34720)
LAN cable
(streight)
1 )
TEST PROGRAM 3-2 Testing method
No.9 RS4: RS-485 test using.
RS-485 25P D-sub cable for MY8-AE
(cross)
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
PC9500N or PC9500N series
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9 9
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