Pioneer PRA-BD11, Service Manual

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PRA-BD11
48
1 2 3 4
1 2 3 4
C
D
F
A
B
E
7.1.6 [PRA-BD12]: LIST OF STATUS LED INDICATION
A total of 9 LEDs (3 for checking the power supply and 6 for checking operations) are provided with the PRA-BD12.
With these LEDs, the operation status of the PRA-BD12 can be checked after +5 V power is supplied to it.
CN8610
LEDs for checking
the power supply
LEDs for checking
operations
+3.3V
+2.5V
LED5 LED3 LED1
LED6 LED4 LED2
+5V
CN8601 CN8602
+3.3V
+2.5V
+5V
LED5 LED3 LED1
LED6 LED4 LED2
1. Indications of the LEDs for checking the power supply
After +5 V power is supplied to the PRA-BD12, an LED will light if power with the corresponding voltage is being
supplied, or it will remain unlit if power with the corresponding voltage not supplied. All three LEDs must be lit for there to
be no problem with the PRA-BD12.
Each LED corresponds to the following power voltages:
+5 V
: Power supplied from AVIB Assy through CN8601 (PH connector) then through the overcurrent protection circuit
+3.3 V : Power supplied from the +5 V power supply through IC8602 (regulator)
+2.5 V : Power supplied from the +5 V power supply through IC8601 (regulator)
2. Firmware version indication by the LEDs for checking operations
For about 10 seconds immediately after +5 V power is supplied to the PRA-BD12, six LEDs for checking operations
indicate the firmware version with their lighting statuses. LEDs 1-4 represent the place value of ones, and LEDs 5-6
represent the place value of tens. See the table below.
Version 1
7 Version
LED5 LED3 LED1
LED6 LED4 LED2
Statuses of
the LEDs for
checking
operations
Statuses of
the LEDs for
checking
operations
LED5 LED3 LED1
LED6 LED4 LED2
2
8
LED5 LED3 LED1
LED6 LED4 LED2
LED5 LED3 LED1
LED6 LED4 LED2
3
9
LED5 LED3 LED1
LED6 LED4 LED2
LED5 LED3 LED1
LED6 LED4 LED2
4
10
LED5 LED3 LED1
LED6 LED4 LED2
LED5 LED3 LED1
LED6 LED4 LED2
5
20
LED5 LED3 LED1
LED6 LED4 LED2
LED5 LED3 LED1
LED6 LED4 LED2
6
30
LED5 LED3 LED1
LED6 LED4 LED2