A B757-200 Leading Edge Slat Disagreement light alerted at 4;000 FT on approach with the flaps between 1-5 degrees. The Quick Reference Handbook enabled slats 1 degree selection but the Trailing Edge Disagreement illuminated at flaps 1 degree. An emergency landing was completed.

Narrative

We were approaching ZZZ Airport for landing and turning a right base for Runway 9. We were at 4;000 FT and 210 KTS and selected flaps to 1 degree. The 'Leading Edge Slat Disagreement' light illuminated and the flap indicator showed the flap position to be in between 1-5 degrees. We declared an emergency with ZZZ Approach Control. I flew the aircraft and the Captain performed the Quick Reference Handbook Leading Edge Slat Disagreement Abnormal checklist. The leading edge slats were able to be extended to 1 degree. The procedure then instructs you to extend the flaps to 20 degrees for landing using the flap handle and the alternate flap switch. We attempted to set the flaps to 5 degrees and got a Trailing Edge Flap Disagreement light. We broke off of the LOC and approach for vectors for a downwind to complete this abnormal procedure with the intention of re-intercepting the LOC for the approach. We accomplished this procedure and turned inbound for the approach. I asked the Captain if he would prefer to make the approach to landing. He said yes; so we transferred the aircraft controls and he completed the approach and landing. Landing was to be accomplished with flaps 1 degree; Vref 30+40 speed. Autobrakes 3 was set and we landed without further incident. Once clear of runway; the Emergency Equipment Chief did a visual inspection of the gear and brakes and cleared us to taxi.