Status Leds - Pioneer MEP-7000 Service Manual

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6.5 STATUS LEDS

Whether each device has properly started or not can be confirmed with the status LEDs mounted on each main board of
A
the control and drive units. Confirmation is also possible by performing auto device diagnosis (see [3] of "6.2 SERVICE
MODE FOR THE DRIVE UNIT").
The status LEDs are useful for checking of each device while the unit is disassembled.
[1] Control Unit (NORTH Unit)
When power (V+BF3R3D line) is supplied to the NMAIN Assy, the Power indicator lights in red.
After the main CPU (NORTH CPU) of the control unit starts up properly, it starts monitoring the statuses of the devices.
If a defective device is detected, two Status LEDs warn of it by lighting or flashing.
(The Status LED 2 is to be mounted upon future design change. Until then, use the waveform from Pin 2 of IC1700 for
checking.)
B
STATUS LED
D602 RED
C
D
Memo: Besides the Status LEDs, a Power indicator is provided for the NMAIN Assy. When power is supplied to
the V+BF3R3D power line, D601 lights in red.
E
F
104
1
2
POWER INDICATOR of V+BF3R3D
D601 RED
Main CPU [reverse side]
(NORTH CPU)
MEP-7000
2
3
Pulse output [reverse side]
IC1700 CPLD 2pin
NMAIN ASSY
3
4
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