EN 164
3139 785 31532
9.
Circuit- and IC Description
9.1. PSU
Board
9.1.1. General
MAINS CONNECTOR
Figure 9-1 PSU Board Layout
The PSU board provides the following connection to the rest
of the set:
•
Connector A: Supply/Signal to Analog Board
Pin no.
Supply / Signal Remarks
1
12VSTBY
2
STBY control
>2.5V = supply for conn. B
is off (Standby mode)
<0.5V = supply for conn. B
is on (On mode)
3
5VSTBY
4
DD_ON
>2.5V = supply for conn. D
is on
<0.5V = supply for conn. D
is off
5
3V3STBY
6
IPFAIL
>4.0V = power is good
<0.5V = power fail
7
5NSTBY
8
GND
9
33VSTBY
10
GND
11
VGNSTBY
9. Circuit- and IC description
•
Connector B: Supply to Digital Board
Pin no.
Supply / Signal Remarks
1
3V3D
2
3V3D
3
3V3D
4
3V3D
5
GND
6
12VD
7
GND
8
GND
9
5VD
10
HD_ON
>2.5V = supply for conn. C
& G is on
<0.5V = supply for conn. C
is off
11
GND
12
5ND
•
Connector C: Supply to HDD
Pin no.
Supply
1
12VH
2
GND
3
GND
4
5VH
•
Connector D: Supply to Basic Engine
Pin no.
Supply
1
12VE
2
GND
3
GND
4
5VE
•
Connector E: Not in use
F: Not in use
The PSU is designed with short-circuit protection that will
shutdown the power supply. When this happen, the voltage
stored in capacitor C1 and C40 will prevent the Power Supply
to turn-on, therefore they must be discharged before the PSU
can function normally again.