Brother LX-200 Service Manual page 160

3
An error occurred during processing after power ON (before film feed).
a. Abnormal +24V DC supply
b. Abnormal DC input voltage.
c. Abnormal X-cutter power ON processing.
d. Abnormal Y-carriage power ON processing.
e. Abnormal Y-cutter power ON processing.
Problem Check Item
a. Abnormal +24V Is +24V DC voltage at ±0V?
DC supply
Does +24V DC voltage
exceed 24 V, at the same
level as the AC adaptor
output voltage (at rated AC
input)?
Is power supply IC#6 pin 7
switching?
Is transistor Q8 collector
voltage switching between 0
V and input voltage?
Is transistor Q5 collector
voltage switching between
+24 V and 0 V?
b. Abnormal DC Is input voltage from AC
input voltage adaptor between 16 V and 23
V (at rated input)?
If AC adaptor input voltage is
equal or below 23 V, is main
CPU port P66 (Pin 62) at
High level?
If AC adaptor input voltage is
equal or above 16 V, is main
CPU port P67 (Pin 63) at
Low level?
c. Abnormal X- X-cutter does not move at all?
cutter power
ON processing
Error occurs during X-cutter
position detection?
Cause
Coil L1 discharged. Replace Main PCB
assy.
Continuity problem with Replace Main PCB
diode D2. assy.
Defective AC adaptor. Replace AC adaptor.
Defective power supply Replace Main PCB
IC#6. assy.
Defective transistor Q8. Replace Main PCB
assy.
Defective transistor Q9. Replace Main PCB
assy.
Defective transistor Q5. Replace Main PCB
assy.
Defective AC adaptor. Replace AC adaptor.
Defective transistor Q7. Replace Main PCB
assy.
Defective transistor Q6. Replace Main PCB
assy.
Defective Zener diode Replace Main PCB
ZD1. assy.
Foreign matter stuck in Clean out foreign
cutter. matter.
Defective X-cutter. Replace the X-cutter
unit.
See Abnormal X-cutter operation.
7
7-8
Remedy Repair
Replace L1.
Replace D2.
Replace
IC#6.
Replace Q8.
Replace Q9.
Replace Q5.
Replace Q7.
Replace Q6.
Replace ZD1.
See
Section
3.3.3
3.3.4
3.3.5
3.5.1
3.3.3
3.3.4
3.3.5
3.5.1
3.3.3
3.3.4
3.3.5
3.5.1
3.3.1
3.3.3
3.3.4
3.3.5
3.4
3.6.1
3.7.1
3.8.1
3.8.2
3.10
3.11.1
3.12.1