Yamaha RX-V681 Service Manual page 50

RX-V681/RX-A760
N5. NETWORK MODULE CONNECT CHECK
This menu is used to check the connection between Network Microprocessor (N) and Main Microprocessor (M).
N5-1. SPI
SPI (Serial Peripheral Interface) connection between Network Microprocessor (N) and Main Microprocessor (M)
is checked.
C1. DIGITAL P.C.B. CHECK
This menu is used to check the communication and bus line connection between devices on DIGITAL P.C.B.
C1-1. ALL
The total detection result of sub-menus from C1-2 to C1-8 is displayed.
C1-2. BUS FLASH ROM
FLASH ROM (IC86)ʼs reading/writing are checked.
C1-3. BUS FPGA
Communication and bus line connection between microprocessor (IC90) and FPGA (IC50) are checked.
C1-4. I2C
The I2C (Inter integrated circuit) bus line connection is checked.
50
N5-1
SPI:OK
OK: No error detected
NG M -> N: An error is detected on M to N route
NG M <- N: An error is detected on N to M route
NG M <-> N: An error is detected on Clock and/or
C1-1
ALL:OK
OK: No error detected
NG: An error is detected
C1-2
BUS_FROM:OK
OK: No error detected
NG: An error is detected
C1-3
BUS_FPGA:OK
OK: No error detected
NG: An error is detected
C1-4
I2C:0-0 0 00
Error detection of Video selector (IC341 on OPERATION P.C.B.)
Error detection of Video decoder (IC21)
Error detection of Front HDMI equalizer (IC423)
Error detection of HDMI TRX (IC7)
Error detection of HDMI switcher 1 (IC2)
M to N and/or N to M route(s).
0 : No error detected
1 : An error is detected