Service manual

4. Troubleshooting
4-9
4.5 How to Check
［A］ Checking for Disconnection of Voltage Adjusting Resistor Hand Trimmer
Turn the knob right and left, and check if the resistance
changes. It is normal if the resistance value is within the
following ranges.
Resistance value : several Ω-5kΩ
The resistance decreases when the knob is turned in the
direction of A.
The resistance increases when the knob is turned in the
direction of B.
Also make sure resistance varies smoothly.
［B］ Measurement of Generator Winding Wire Resistance
The standard resistance value of each wire includes the generator’s winding wire resistance
value. (Please refer to the sentence”5.1 Generator’s Winding Wire Resistance Value”.)
Voltage selection switch position 480/277V
6-15-1
(1) Generator armature winding wires
Remove all wires leading to the control panel terminal from the generator, and measure
the resistance between the wires on the generator side. (Please explain how to check with
voltage selector switch circuit.)
T1 terminal
- T4 terminal
, T7 terminal
- T10 terminal
T2 terminal
- T5 terminal
, T8 terminal
- T11 terminal
T3 terminal
- T6 terminal
, T9 terminal
- T12 terminal
SG06067