Agilent Technologies 5071A manual 48V Subpanel Assembly, Input Chassis Ground

Assembly-Level Service

Theory of Operation

Option 048: The slot/module interconnect diagram on page 3-28 is changed:

The J3 Low Current Steering Logic connector does not have +5 VDC, POWER FAIL, or BAT VALID signals present.

48V Subpanel Assembly

The schematic diagram in figure 2-1 below illustrates the wiring of the 48V Subpanel Assembly. This assembly steers dc input power, and provides fuse protection for the external 48V external dc input power. The output of this circuit at P1 is routed to the input of the External DC Input Filter Block (J1) illustrated at the top-left comer of figure 3-3. in the 5071A Assembly-Level Service manual.

+

Input 2

-

Chassis

Ground

+

Input 1

-

CR1	MP3
	Rear Panel	P1
	DC Fuse Holder
	F2 2.5A DC Fuse
	+
CR2	Red	Red
Grn/Yel	Grn/Yel	To A1
	Blk
	-
	MP2	MP3
CR3	3 Position Solder
	Terminal strip	Solder Lug

CR4

MP1

Rear Panel

DC Power

5 Position screw Terminal strip

Figure 2-1. DC Input 1 and 2 Power Steering Schematic (48V Subpanel Assembly, part number 05071-60277)

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