Yamaha R-N500 Service Manual page 28

R-N500
C2. NETWORK IC CHECK
This menu is used to check the communication and bus line connection between devices related to network.
C2-1. ALL
The total detection result of sub-menus from C2-2 to C2-4 is displayed.
C2-2. NET RAM
Communication and bus line connection between network microprocessor (IC21) and SDRAM (IC952) are
checked.
C2-3. PHY (Ethernet PHYceiver) TEST
The perform a loopback test in PHY (IC955).
C2-4. APL (Apple) ID CHECK
Apple authentication IC (IC956) device ID is checked.
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C 2 - 1
A L L : O K
OK: No error detected
NG: An error is detected
--: Checking
C 2 - 2
N E T R A M : O K
OK: No error detected
NG: An error is detected
--: Checking
C 2 - 3
P H Y T E S T : O K
OK: No error detected
NG: An error is detected
--: Checking
C 2 - 4
A P L I D : O K
OK: No error detected
NG: An error is detected
--: Checking