B767 CREW WAS FLYING THE PERCH NINE SID. THEY WERE GIVEN A WRONG DEP FREQ. IN THE DELAY; THEY BEGAN TO FLY THE LOST COM PROC. THE CHART SHOWS A TURN REACHING 2000 FT; AND THE LOST COM PROC SMALL PRINT VERBIAGE; SHOWS REACHING LAX 8 DME.

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TURN ON SID WITHOUT CLRNC. DEPARTING LAX RWY 7L ON THE PERCH SID; APCHING 2000 FT; WE WERE TOLD TO CONTACT DEP. ASSIGNED FREQ FROM CLRNC DELIVERY 124.3 (CONCURRED WITH SID). HOWEVER; THE CTLR ON THAT FREQ TOLD US 'ASSIGNED FREQ IN ERROR; CONTACT SOCAL ON 125.2.' BY THIS TIME WE WERE PASSING 2000 FT; AND PER SID STARTED OUR R TURN TO 250 DEGS. WHEN WE ESTABLISHED COM ON 125.2; CTLR (AFTER A FEW SECONDS) ASKED IF WE WERE IN A TURN; AND IF SO WHETHER IT WAS ASSIGNED ON TKOF. HE GAVE US A VECTOR OF 180 DEGS; WE COMPLIED AND QUERIED HIM ABOUT THE DEPICTED TURN PASSING 2000 FT (HOWEVER ALSO SHOWN AS LAX 8 DME ON THE SID VERBIAGE). AFTER FURTHER REVIEW AND DISCUSSION; IT WAS EVIDENT THAT THE HEADING (070 DEGS) SHOULD HAVE BEEN MAINTAINED BY US ON DEP; WE SHOULD NOT HAVE CONSIDERED THE DELAY IN ESTABLISHING COM AS AUTH TO FLY THE LOSS OF COM PROC (WHICH IN ITSELF IS AMBIGUOUS; 2000 FT; OR 8 DME). CTLR RPTED NO CONFLICT AT THE TIME. SUPPLEMENTAL INFO FROM ACN 603951: ON THE PRE-DEP CLRNC RECEIVED FROM ACARS; THE DEP FREQ WAS 125.2. AFTER TKOF; TWR DIRECTED US TO CONTACT DEP CTL. WE SWITCHED OVER TO 125.2; CALLED; BUT DID NOT GET AN ANSWER. WE THEN FOLLOWED THE 'LOST COM PROCS' ON THE SID WHICH DIRECTED US TO TURN R TO 250 DEGS AT 2000 FT MSL. WE STARTED THE R TURN AND A CTLR CAME ON THE FREQ AND SAID CONTACT DEP CTL ON FREQ 124.3.