Rev. 1.00
- 100 -
SRP-275II
7-2-1 Initialization problems
Problem
Probable Cause
Level
Checkpoint
Action
Output voltage of internal
SMPS
or
ASSY-PCB MAIN
failure (Abnormal
regulator circuit)
B
Check 24V input voltage at
CN7
and output voltage of DC
+3.3V(
U8
)/24V control circuit
and fuse(
F1
)
Replace external
Power supply unit or
ASSY-PCB MAIN
or fuse
ASSY-PCB MAIN
failure
(Abnormal regulator circuit)
B
Check voltage level at
RESET
terminal (pin 59) of CPU,
U4
(3.0~3.6V)
Replace
ASSY-PCB MAIN
ASSY-PCB MAIN
failure
(Abnormal CPU clock generator circuit)
B Check clock generator (
U4
)
Replace
ASSY-PCB MAIN
ASSY-PCB MAIN
failure
(Program ROM selection failure)
B Check input at pin 26 of IC(
U1
)
Replace
ASSY-PCB MAIN
Printer does
not operate
at all
ASSY-PCB MAIN
failure
(SDRAM selection failure)
B Check input at pin 19 of IC(
U3
)
Replace
ASSY-PCB MAIN
Excessive belt tension
A
Check
ASSY-LEVER TENSION
If it is assembled properly
Reassemble
ASSY-LEVER TENSION
Check continuity between
respective terminals
Replace the terminal
Wire break or bad solder point between
connector and HC motor terminals
B
Check solder condition
Resolder as required
Wire disconnect between HC motor
connector and
ASSY-PCB MECHA
B Check connected condition
Make sure the connection
FFC
(35pin) is failure or disconnected
between
ASSY-PCB MECHA
and
ASSY-PCB MAIN
B
Check for connected condition
of
FFC
and
FFC
failure
Make sure the connection
and replace the
FFC
Defective HC motor
B
Check if motor operation is
proper without load
Replace the HC motor, if
is does not rotate properly
Carriage
vibrates,
emits an
unusual
sound, and
causes an
error state at
power on
Home position sensor failure
B
Use an oscilloscope to check the
sensor output signal when
ASSY-CARRIAGE HEAD
passes the sensor
Replace
ASSY-PCB MECHA
A
Check gears for wear and
damage
Replace any damaged
gears
Wear, damage, or contamination of
carriage drive gears
A
Check for dirt deposits or other
foreign matter
Remove any dirt deposits
or foreign matter
Ribbon cassette
’s abnormal operation
B
Check for rotated load of ribbon
cassette knob
Replace
Ribbon cassette
Carriage
head ass’y
first moves
normally, but
then hits the
left side of
the print
frame,
making an
unusual
sound
Head is bumped against
Bracket-
head-cover-L/R
B
Check if
Bracket-head-cover-
L/R
is slanted to the inside
Make it vertically
ASSY-PCB MAIN
failure
(HF motor drive signal failure)
B
Check input signal to HC motor
drive terminal of J3 with an
oscilloscope
Replace
ASSY-PCB MAIN
B
Check continuity between
respective terminals
Replace the terminal
Wire break or bad solder point between
connector and HF motor terminals
B
Check the solder condition
Resolder as required
Defective power input to HC motor
B
Check the input voltage (24V
±2V) between the motor
terminals of the connector using
a DVM or oscilloscope
Inspect and repair
SMPS
circuit
FFC
(35pin) is failure or disconnected
between
ASSY-PCB MECHA
and
ASSY-PCB MAIN
B
Check the connected condition
of
FFC
and
FFC
failure
Make sure the connection
and replace
FFC
HC motor
does not
operate at all
when power
is turned on,
and causes
an error state
HC motor
failure
B
Above six checks have been
passed
Replace HC motor
FFC
(16pin) is failure or disconnected
between
PCB-connector sub ass’y
and
ASSY-PCB MAIN
B
Check the connected condition
of
FFC
and
FFC
failure
Make sure the connection
and replace
FFC
Incorrect DIP S/W setting
A
Check the DIP Switch 1-3 setting
is ON
Correct DIP Switch 1-3
setting
Auto cutter
does not
operate at all
Auto cutter home position sensor
failure
B
Use an oscilloscope to check the
sensor output signal when cutter
blade passes the sensor
Replace
ASSY-PCB AC