Yamaha ACU16-C Service Manual page 35

QQ
3 7 63 1515 0
Using the USB cable, connect the [USB] terminal and the USB terminal of PC.
Using the serial cable (cross), connect the [TO COMPUTER] terminal and the serial terminal of PC.
Using the LAN cable (CAT5: cross), connect the [PRIMARY] terminal and that of NHB32-C (for jigs).
Using the LAN cable (CAT5: straight), connect the [RS-485] terminal and JK1 of the CPU circuit board.
Set the [UNIT ID]switch to "0".
Using the 25P D-sub cross cable (for MY8-AE), connect SLOT1 of DME32 and [AES/EBU1] of NHB32-C.
Using the 25P D-sub cross cable (for MY8-AE), connect SLOT2 of DME32 and [AES/EBU2] of NHB32-C.
3.2 Testing method
Select "5. ACU16-C FINAL ASS'Y" on the start-up screen of the TEST program, and testing of the test items is automatically
executed in the order of the following 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 HMI
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
Turn the [UNIT ID] switch clockwise according to the instruction on the PC screen.
TE
L 13942296513
Following test items are tested one after another each time the "ENTER" key of the keyboard is pressed.
11 LED : LED lighting test
Check that LED's on the front panel light up in the order of [LINK] → [CONDUCT] → [ERROR] and then all three of
them simultaneously.
12 THR : Audio signal test
Set PATCH of NHB32-C (for jigs) to "1".
Check that 1kHz, +4dBu±1dB signal is output at the CH1, CH9 output.
Monitor the CH1 and CH9 output with the oscilloscope and check that the sine wave is free from disturbance.
Hear the CH1 and CH9 output through the powered speaker and check that it is free from distortion and noise.
Reconnect the LAN cable (CAT5: cross cable) to the CobraNet [SECONDARY] side.
Press the "ENTER" key of the keyboard.
Set PATCH of NHB32-C (for jigs) to "2".
Check that +4dBu±1dB signal is output at CH1 and CH9 output.
Monitor the CH1 and CH9 output with the oscilloscope and check that the sine wave is free from disturbance.
Hear the CH1 and CH9 output through the powered speaker, etc. and check that it is free from distortion and noise.
13 DAC : DAC converter test
Press the "ENTER" key of the keyboard.
Check that the CH1 to CH16 output is -30dBu or less.
www
14 FST : Factory set
Initialize IC221 (EEPROM) of the MAIN circuit board to the factory setting state.
15 EXI : The program exits from the test mode and is restarted in the normal mode.
.
http://www.xiaoyu163.com
x ao u163
y
i
http://www.xiaoyu163.com
2 9
8
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Automatic judgment
Q Q
3 6 7 1 3 1 5
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
ACU16-C
9 9
9 9
35