Yamaha MCR-330 Service Manual page 29

7. SYSTEM MONITOR
This menu is used to display the A/D conversion value of the main microprocessor which detects panel keys of this
unit and protection functions by using the sub-menu.
7-1 PS1 / PS2
(Power supply voltage protection detection)
Power supply voltage protection value
(Normal value: PS1: 103 to 168, PS2: 101 to 151)
PS1: Detects +3.3D, +5A, +5I, +12A, +15AMP, -23D and -32D.
PS2: Detects +5.1USB and +7.2MTR.
* If PS becomes out of the normal value range, the protection function works to turn off the power.
(Reference voltage: 3.3V=255)
7-2 LUMINANCE
Not applied to this model.
7-3 AUDIO (iPod audio signal detection)
This menu is used to detect the audio signal output of iPod.
(Normal value: 100 or more)
The voltage at 89 pin of microprocessor IC201 is displayed with 3.3V/255 as a reference.
7-4 MODEL (Model detection)
The voltage at 93 pin of microprocessor IC211 is displayed with 3.3V/255 as a reference.
PS2
PS1
Display 194 – 233
Model CRX-330
CRX-330/NS-BP100
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