Marantz AV8003 - Check 4: HD Radio Error Detection

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Check 4
HD Radio Error Detection (/U1B only)
Check 4
HD Radio Error Detection ( /U1B のみ )
Error Detection
Reason Check points
"CPU <-> HDR"
on the FL DISPLAY
Main-CPU to
HD Radio-CPU communication fail
6V power supply CN92, IC61, BN92
5V power supply IC94
HD Radio-CPU
Communication
IC91, X901 etc.
CN91, JW29
"HDR <-> HDRM"
on the FL DISPLAY
Module to
HD Radio-CPU communication fail
Module CPU fail HD Radio module
Communication BN91, IC93
3.3V power supply IC95
No error message
Not possible to up/down.
RF tuner (front-end) control fail
12V power supply BN91, CN91, IC50
Module fail HD Radio module
No error message
No sound
or Noisy
Audio signal path
RF signal condition
Module
Audio signal path BN91, CN91 etc
Antenna
RF signal level, terminal
External interference
Module fail Module performance