Brother LX-300 Service Manual page 160

4
An error occurred during processing after power ON (after film feed).
a. Defective film or cartridge.
b. Defective film feed detector (TPS) switch.
c. Defective film feed system.
Problem
a. Defective film Is the film cartridge correctly
or cartridge mounted?
Does film remain in the
cartridge?
Is the cartridge deformed or
cracked?
b. Defective film Is the orange lead
feed detector connector connected to
(TPS) switch. CN3 on the Main PCB?
Does the sensor lever press
the film feed detector (TPS)
switch (leaf switch F assy)
when film is inserted?
Is the leaf switch open when
no film is inserted?
Is main CPU port P17 (Pin
24) at High level when leaf
switch TPS is open?
When leaf switch TPS is
shorted, is CN3 on the Main
PCB shorted?
Is main CPU port P17 (Pin
24) at Low level when CN3
on the Main PCB is
shorted?
When main CPU port P17
(Pin 24) is at Low level, is
this recognized by the main
CPU?
c. Defective film Defective film feed (LF)
feed system motor.
Defective film compression
system.
Check Item
Defective film
cartridge mounting.
No film remaining.
Defective cartridge.
Leaf switch assy not
connected.
Incorrectly installed
leaf switch F assy.
Incorrectly installed
T-sensor lever.
Defective T-sensor
lever.
Conductivity problem
in Main PCB.
Defective pull-up
resistor R46.
Defective leaf-switch F
assy.
Conductivity problem
in Main PCB.
Defective series
resistor R42.
Defective main
CPU#3.
See
Cause Remedy
Correctly mount the
film cartridge.
Replace the film.
Replace the
cartridge.
Correctly connect
the leaf switch assy.
Correctly install the
leaf switch F assy.
Correctly install the
T-sensor lever.
Replace the T-
sensor lever.
Replace Main PCB
assy.
Replace Main PCB
assy.
Replace leaf-switch
F assy.
Replace Main PCB
assy.
Replace Main PCB
assy.
Replace Main PCB
assy.
Abnormal manual feed .
5
7-10
See
Repair
Section
3.2
3.3.3
3.3.4
3.3.5
3.3.1
3.3.3
3.3.4
3.3.5
3.4
3.6.2
3.3.3
3.3.4
3.3.5
Replace R46.
3.4.2
3.5.1
3.3.1
3.3.3
3.3.4
3.3.5
3.4
3.6.2
Replace R42.
3.3.3
3.3.4
3.3.5
Replace
3.4.2
CPU#3.
3.5.1