IBM-AUSTRIA - PC-HW-Support    30 Aug 1999

Power Supply (SelectaDock II - III)

If the power cord is not the problem, either the power supply is defective, or another component is defective causing the power supply to cut off.
To verify the power supply is operating correctly, do the following:

1.  Power-off the computer and disconnect the SelectaDock Docking System power cord.
2.  Remove all internal devices, external devices, and the computer from  the SelectaDock Docking System.
3.  Undock the port replicator.
4.  Remove the half-height or device space bay frame (see Half-Height Bay Frame).
5.  Remove connectors -1-,  -2-, -3-, -4-, -5- (and -6- if SelectaDock III) from  each device, tray, or card.

    
   

6.  To power on the power supply, on connector -5-,
   •  For SelectaDock II:short-circuit pins 1 and 3, 2 and 8 of connector -5-.
   •  For SelectaDock III:short-circuit pins 2 and 8, and with a 15-ohm resistor short circuit-pins 1 and 15 of connector -5-.

    Then check the power supply voltages on each connector.

Pin	Vdc
Red cord	+ 5 V
Yellow cord	+ 12 V

Power Supply Connector -2-
 

Pin	Signal	Vdc Min.	Vdc Max.
1, 2	CVCC	+ 19 V	+ 21 V
3, 4	GND	-	-

Power Supply Connector -3-

Pin	Signal	Vdc Min.	Vdc Max.
1	- 12 V	- 11.4 V	- 13.2 V
2, 3	GND	-	-
4	- 5 V	- 4.53 V	- 5.5 V

Power Supply Connector -5-

Pin	Signal	Vdc Min.	Vdc Max.
1 1 Note	VCC-off	+ 2.0 V	+ 4.5 V
2, 3	GND	-	-
4	SUB 12 V	+11.4	+12.6
5	GND	-	-
6, 7	+12 V	+11.4 V	+12.6 V
8	GND	-	-
9-11	+3.3 V	+3.0 V	+3.6 V
12-14	GND	-	-
15-17	+5 V	+4.75 V	+5.25 V
18-20	GND	-	-

1) Note: Available only on SelectaDock III

Power Supply Connector -6- (SelectaDock III - 3537-003 only)

Pin	Signal	Vdc Min.	Vdc Max.
1 (red)	Fan off	0 V	+ 0.5 V
2 (blk)	GND	-	-

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