Test Program; Ao Y U163; Http://Www.xiaoyu163.Com - Yamaha ACU16-C Service Manual

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TEST PROGRAM

1. Preparation
1.1 Conditions
Unless otherwise specified, use the following conditions.
0dBu = 0.775 Vrms
0dBFS = 0 decibel full scale
Apply the audio signal through NHB32-C (for jigs).
Use 10kΩ for the load of the analog output.
Use 100kΩ or more input impedance for the oscilloscope, level meter and distortion meter.
Correct the distortion measurement by 80kHz, -6dB/OCT LPF.
Use 10 seconds or more for visual inspection and hearing inspection.
Note) When turning the rotary switch [UNIT ID](MAIN sheet SW201: Part No. V961460), be sure to use a screwdriver with
the tip shape suitable for this switch so as to avoid deformation of the switch.
1.2 Peripheral equipment
Windows PC (serial terminal, USB terminal, USB MIDI driver)
Enter a check [v] for THR On/OFF of USB MIDI driver.
Use IN10 4/5 circuit board (PC9500N) (AAX34720) as a CPU circuit board.
Set all DIP-SW (SW801) (6 switches) to the upper position.
NHB32-C (for jigs)
Make following settings for PATCH "01".
The CH1 to CH8 input of [AES/EBU 1] is output at CH1 to CH8 of CobraNet.
The CH1 to CH8 input of [AES/EBU 2] is output at CH9 to CH16 of CobraNet.
Make following settings for PATCH "02".
The CH1 to CH8 input of [AES/EBU 1] is output at CH17 to CH24 of CobraNet.
The CH1 to CH8 input of [AES/EBU 2] is output at CH25 to CH32 of CobraNet.
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L 13942296513
Set MASTER CLOCK to "AES/EBU 1 1/2".
DME32
Insert "MYT8-AE" into the SLOT 1 and SLOT 2.
1kHz, -14dBFS is output at all channels of SLOT 1 and SLOT 2.
Set MASTER CLOCK to "INTERNAL".
1.3 How to start
Start up the communication software "Tera Term Pro for ACU/NHB" specially intended for ACU16-C/NHB32-C issued as the
master data.
Set the communication format as follows.
Baud rate: 38400 bps
Data: 8 bits
Parity: none
Stop: 1 bit
Flow control: none
To start up the TEST program, turn on the power to ACU16-C and press the "F1" key of the keyboard. Then the PC screen
appears as shown below.
<<<<< ACU16-C/NHB32-C Test Mode >>>>
FIRMWARE VERSION: V1.00
1. NHB32-C FINAL ASS'Y
2. NHB32-C MAIN SHEET
www 3. NHB32-C AES SHEET
4. NHB32-C PN SHEET
5. ACU16-C FINAL ASS'Y
6. ACU16-C MAIN SHEET
.
7. ACU16-C DAC SHEET
Press the number of the keyboard corresponding to the test item number and then press the "ENTER" key. Then testing only the
selected test item will be executed out of the list of test items.

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Enter "FST" and press the "ENTER" key, and only the "FACTORY
SET" command can be executed (and completed in about 30
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seconds).
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ACU16-C
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