Yamaha DBR Series, Service Manual

Page: 54 / 109

54
DBR10/DBR12/DBR15
To debugging mode
To diagnosis mode
Is UART-0
connected?
YES
NO
Is debugging mode starting
switch turned on?
［POWER LED］turned on
［PROTECTION LED］ turned on
DSP initialized （resetting cancelled）
（/DSP-RES）
ADC power down cancelled
（/AD-PDWN）
DSP boot • initializing process
DSP mute process
AMP ENABLE
（AMP-ENA）
DSP mute cancelled
NO
YES
DAC mute cancelled
100msec from the
ADC power down cancelled
LINE output mute cancelled
（LINE-MUTE）
［PROTECTION LED］ turned off
Model number
Not set?
NO
Is it diagnostic mode?
YES
Starts as DBR15.
NO
YES
Internal data initialized
Sound output started
Is FLASH rewriting mode
starting switch turned on?
NO
YES
Power ON （Reset）
To FLASH rewriting mode （Built-in ROM Boot Loader）
To model number
setting mode
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