Yamaha R-N500 Service Manual page 23

● Details of Self-Diagnostic Function menu
A1. AUDIO SET
This menu is used to check audio signal route.
A1-1. NORMAL
The audio signal input to LINE 1 jack is output.
A1-2. PRE MUTE
The audio signal output is muted.
MUTE control port: MT_N_5CH (FRONT L/R, CENTER, SURROUND L/R channels, 60 pin on IC21)
A1-3. VOL MUTE
The sound signal output is muted inside of IC431 (Selector and E-Volume IC).
A1-4. AC B : HIGH
Not for service.
A1-5. AC B : LOW
Not for service.
A2. DIR PLL (Phase Lock Loop)
This menu is used to check the route of digital audio signal input to OPTICAL 1/OPTICAL 2/COAXIAL 1/COAXIAL 2
jack.
A 1 - 1
N O R M A L
MT_N_SW (SUBWOOFER channel, 51 pin on IC21)
A 1 - 2
P R E M U T E
A 1 - 3
V O L M U T E
A 1 - 4
A C ̲ B : H i
A 1 - 5
A C ̲ B : L o
A 2 - 1
D I R P L L : - - -
Lock: Lock
Unlock: Unlock
---: When the analog input is selected for the
input source
R-N500
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