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System Connectors - Mitsubishi Electric apricot MS660 Owner's Handbook Manual

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System Connectors

Front panel connector, PL20
The following system connectors are used to connect various
features to the motherboard. You should not normally need to disturb
these connections but they may become dislodged during work inside
the system casing.
PL3
Power switch (PSU control)
return
PL6
(Connected to pin 6)
Keyed
Hard disk LED signal
Hard disk LED return
Ground
Keylock switch
Keylock switch return
Power ON LED signal
Power ON LED return
Standby LED signal
Standby LED return
Reset switch return
Reset switch
Analogue ground
No connection
No connection
Message LED (control 2)
Message LED (control 1)
IR transmit
IR receive
S y s t e m m o t h e r b o a r d
Pins
Pins
1
1
2
2
3
1
4
2
5
3
6
4
7
5
8
Ground (speaker return)
6
9
7
10
8
11
9
12
10
13
11
12
1
13
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
MS660 OWNER'S HANDBOOK
PL4
Standby switch
Standby switch return
Vcc
Keyed
IRDA input
Ground
IRDA output
Not used
Not used
Speaker out (BEEP)
Message LED
Message LED return
PL7
Not used
Not used
KEYED
No connection
No connection
No connection
5 V supply (fused)
RTS
Digital ground
8/5

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