Weller EC 2002 antistatic Instrucciones Para El Manejo página 52

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Fault-Analysis
GB
a) Soldering iron
1. Balance of potential Zero-Ohm versus tip
2. Sensor 22 Ohm
3. Heating 12 Ohm
b) Power unit
Check according to instruction:
Measuring points against mass M
1. Transformer-output 24 V
When missing line voltage check fuse, main cable,
transformer.
2. Supply voltage 6,4 V
When supply-voltage missing or too high, replace
controller 5 26 702 00.
3. Rated value (potentiometer) 3-6 V
4. If actual value on cold iron > 3 V, the sensor-
line or the OP-amplifier 5 26 700 00 is defective.
5. Ignition puls 1 ms - 5 V
Condition for ignition pulse is: Actual value < rated
value. When impulse missing, replace zero-voltage
switch 5 26 701 00.
6. Ignitionpuls 1 ms - 1,4 V
If impulse 5 V, replace triac no.
7. Potential balance: for using rc-filter remove the
shortering bridge or Zero-Ohm resistor.
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