flow chart - MK Products

2 FLOW CHART 2SYMPTOMF3 FUSE ON COBRA I IS BLOWN WHEN TORCH IS TRIGGEREDPROBLEM AREACOBRA: MAIN BOARD, SLAVE MOTOR OR BRAKE SOLENOIDNOTE :The 115VAC on Cobra I Main P.C. Board is protected byFuse F3. If F3 continually blows, unplug J4 (Brake Solenoid), J7(Slave Motor) from the P.C. Board. Replace the fuse and retrigger. Iffuse does not blow, isolate the problem by plugging in J4 and J7 oneat a time until the fuse blows.STARTF3 FUSE BLOWNCOBRA MAIN BOARDUNPLUG CONNECTORSJ4, BRAKE SOLENOIDJ7, SLAVE MOTORResistance Check :a) Slave MotorJ7-6 to J7-1 = 150 ohmJ7-4 to J7-2 = 150 ohmb) Brake SolenoidJ4-1 to J4-2 = 80 ohmRE-TRIGGER TORCHNOIS COBRA MAIN BOARDF3 FUSE OK ?YESGO TO FLOW CHART # 3COBRA MAIN BOARD, F1 FUSE IS BLOWNPLUG IN J4RE-TRIGGER TORCHYESIS COBRA I MAIN BOARDF3 FUSE OK ?NOSLAVE MOTOR IS OKPLUG IN J7SLAVE MOTOR ISDEFECTIVERE-TRIGGER TORCHYESIS COBRA MAIN BOARDF3 FUSE OK ?NOBRAKE SOLENOID IS OKBRAKE SOLENOID ISDEFECTIVECobraMig 260 Owner's Manual - Page 21