83
Trouble shooting
Turn the machine’s wall switch off and on again.
Fault persists.
Machine working
Check fuses F11, F12, F21 and F22.
Fuses sound
Fuse fault
Check that the input voltages to the PCB are
correct. Measure on PCB connector X72
between the following inputs:
X72:1 - 2
ca 1,75 V ~
X72:2 - 3
ca 1,75 V ~
X72:4 - 5
ca 14,5 V ~
X72:6 - 7
ca 13,5 V ~
An incorrect voltage
Voltages correct
Check the three glass-
tube fuses on the PCB.
Rating: 1 A/250 V.
OK
Fuse fault
Remove connector X172 on transformer T10.
Measure the voltages between the following
outputs on the transformer board.
5 - 6
ca 1,75 V ~
6 - 7
ca 1,75 V ~
3 - 4
ca 14,5 V ~
1 - 2
ca 13,5 V ~
Voltages correct
An incorrect voltage
On T10 check the input
voltage at connector X178
(120/230 V) and that the
strap is correctly located
and in contact with the
circuit board.
OK
A fault
Machine completely ”dead”.
Display blank.
1
7
X72
2316
F2, F3
Display
2316
3348
X172
1
7
Strap
PCB transformer T10
Error code/symptoms
Fault-finding
F1
Electronics
Transient fault. No action
required.
Change fuse(s) and check
functioning.
Change fuse(s) and check
functioning.
Replace program control unit
PCB.
Fault in wiring between
transformer and circuit board.
Check wiring and replace if
necessary.
Replace transformer T10.
Voltage fault: investigate
cause in power supply
beyond machine.
Cause/Action
X178
Содержание EXSM 230 S
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