EMER GND EQUIP CALLED OUT FOR ACR WDB NO FLAP APCH LNDG.

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WE DEPARTED MSP USING NORMAL PROCS INCLUDING FLAPS 15 DEGS FOR TKOF. THE FLT WAS NORMAL UNTIL EXTENDING FLAPS FOR LAX. WE COULD NOT MOVE THE FLAP LEVER PAST THE 1 DEG DETENT. WE MADE MISSED APCH AND HELD TO SETUP FOR A 0 DEG FLAP LNDG. WE ATTEMPTED MORE EXTENSIONS WITH NO LUCK (RETRACTION NORMAL). WE FOLLOWED ABNORMAL PROC IN COCKPIT OPERATING MANUAL AND LANDED ON 25R LAX WITH LEADING EDGE AT TKOF AND TRAILING EDGE 0 DEGS. THE 'DIAL-A-FLAP' DIAL WAS RPTED TO BE FOUND SLIGHTLY OUT OF THE UP POS RESTRICTING FLAP HANDLE TRAVEL AND FLAP EXTENSION. THE DIAL MAY HAVE BEEN BUMPED SOMETIME DURING FLT. MY EXPERIENCE IS THAT THE DIAL-A-FLAP IS SELDOM USED (I'VE USED IT ONCE) AND DOES NOT EXIST ON OUR NORMAL FLEET OF WDB'S. CREW COORD DURING THIS INCIDENT WAS VERY GOOD. THE FO FLEW THE ACFT DURING HOLDING AND BACK TO APCH POS FOR RWY 25L (LANDED ON RWY 25R) WHILE I WENT OVER PROCS WITH THE SO. PLENTY OF TIME WAS ALLOWED AND NO ONE FELT RUSHED DURING THE PROC. UNFORTUNATELY THE ABNORMAL PROCS DID NOT CALL FOR CHKING THE POS OF THE DIAL-A-FLAP DIAL. ADDING THIS TO THE ABNORMAL CHKLIST SHOULD PREVENT THIS FROM HAPPENING AGAIN. I HAVE CONTACTED MAINT CTL MANY TIMES ABOUT A PROB OR DISCREPANCY NOT COVERED IN OUR MANUALS. I DIDN'T THIS TIME BECAUSE WE HAD A PROC TO COVER THE SIT IN THE COCKPIT OPERATING MANUAL. AN EXTENUATING PROB WAS A TREMENDOUS AMOUNT OF RADIO INTERFERENCE CAUSED BY BLEED-THROUGH OF ALL THE OTHER RADIOS. THE INTERFERENCE MADE IT VERY DIFFICULT TO UNDERSTAND RADIO AND COCKPIT COMS AND MADE IT NECESSARY TO CLARIFY SEVERAL XMISSIONS. AT APPROX 2 MI OUT ON FINAL; THE TWR CLRED ANOTHER ACR WDB ACROSS RWY 25R FOR TKOF ON RWY 25L. THEY ADVISED US TO BE CAUTIOUS OF WAKE TURB FROM DEP WDB. I FELT THIS XING AND TKOF WAS INAPPROPRIATE UNDER THE CIRCUMSTANCES. AN EMER WAS NOT DECLARED BUT EQUIP WAS REQUESTED TO STAND BY.