Hakko Electronics 936 Instruction Manual

Contents

Hakko Electronics 936 Instruction Manual Manual pdf 9 page image

1234567 89 1012118Disconnect the plug and measurethe resistance value between theconnecting plug pins as follows.Checking for breakage of the heating element and cord assemblya Between pins 4&5 (Heating Element) 2.5 - 3.5 (Normal)b Between pins 1&2 (Sensor) 43 - 58 (Normal)c Between pin 3&Tip Under 2If the values of 'a' and 'b' are outsidethe above value, replace the heatingelement (sensor) and/or cordassembly. Refer to Procedures1 and 2.If the value of 'c' is over the abovevalue, remove the oxidization film bylightly rubbing with sand-paper orsteel wool the points shown below.1. Broken Heating Element1. Turn the nut (1) counterclockwise and remove the tipenclosure (2), the tip (3).2. Turn the nipple (4) counterclockwise and remove it from theiron.3. Pull both the heating element (6) and the cord assembly (11)out of the handle (12). (Toward the tip of the iron.)4. Pull the grounding spring (5) out of the D-sleeve.Measure when the heating element is at room temperature.1. Resistance value of heating element (RED) 2.5 - 3.52. Resistance value of sensor (BLUE) 43 - 58If the resistance value is not normal, replace the heatingelement.(Refer to the instructions included with the replacement part.)After replacing the Heating Element,1. Measure the resistance value between 1) pins 4 & 1 or 22) pins 5 & 1 or 2. If it is not , the heating element andsensor are touching. This will damage the P.W.B.2. Measure the resistance value 'a','b',and 'c' to confirm thatthe leads are not twisted and that the grounding spring isproperly connected.Disassembling the 907/908Heating Element (Red) Senser (Blue)

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