Yamaha R-N402 Service Manual page 25

● 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: MAIN_N_MUTE (FRONT L/R, SURROUND L/R channels, 58 pin on IC302)
A1-3. VOL MUTE
The sound signal output is muted on Volume IC.
A2. DIR PLL (Phase Lock Loop)
This menu is used to check the route of digital audio signal input to OPTICAL/COAXIAL jack.
A1-1
NORMAL
REC_N_MUTE (REC L/R channel, 60 pin on IC302)
A1-2
PRE MUTE
A1-3
VOL MUTE
A2-1
DIR PLL:---
Lock: Lock
Unlock: Unlock
---: When the analog input is selected for the input
source
R-N402/R-N402D
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