
B–62835EN/01
10. TROUBLESHOOTING
(ANALOG INTERFACE SPINDLE)
353
(1) Remove PCB–1 on the spindle amplifier.
(2) Turn off power of main power supply of machine side and remove the
motor power line.
(3) Measure resistance across the following terminals of the transistor
module on the circuit board shown below with a tester.
B1 B3 B5
B2 B4 B6
Uo Vo Wo
N
(–)
P
(+)
B1
B2
Uo
B3
B4
B5
B6
WoVo
N
(–)
(+)
P
Judgement (Range of tester : x10 ohm)
Terminal Tester Normal Abnormal
–
C : + 100 ohms Short, infinity
–
C : – Infinity Short, 100 ohms
–
C : + 100 ohms Short, infinity
–
C : – Infinity Short, 100 ohms
–
B : + 100 ohms Short, infinity
–
B : – 100 ohms Short, infinity
* When a transistor is defective, terminals across collector and
emitter, and across collector and base are short–circuited.
Collector (C)
Base (B)
Emittor (E)
10.10
CONFIRMATION OF
TRANSISTOR
MODULE