Bixolon SRP-270 Manual De Usuario

Rev. 3.02

- 69 -

SRP-270

Phenomenon

Condition

Cause

Level

Check point & Method

Repair Method

Defective

⑤
input charge
pulse

B ·Observe

oscilloscope
to check if the input
charge pulse is within
rated values

·Pulse rating:

For voltage and pulse
width refer to the
specifications for
SMP-710/710N

·If input pulse is

not generated or
if such pulse is
outside rated values
repair the driving
control circuit

2. No dot
printing
is performed

Motor rotates
normally but no
dot printing is
performed

Positional

⑥

relations-hip
between
head and
the platen

·Check if the gap

between the Platen
and the tip of
head is correct
correct value :
0.51±0.1mm

·If incorrect, perform

repair according
to "Adjustment"

Damaged

①

lead in head
FPC

B ·Check

the

conductivity

between the pertinent
common lead of the
head FPC and other
terminal

·If there is no

conductivity,
replace the head

Lead

②
breakage
between
connector and
FPC terminals

B ·Check

the

conductivity

between the pertinent
terminals

·Replace the main

circuit board Assy if
these is no
conductivity

Damaged

③
lead of a dot
driving coil

·To check if the

resistive value of the
pertinent dot driving
coil is within rated
values, measure the
resistance of the
terminal between
connectors Rated
value : 20Ω±10%

·If the resistance is

outside rated
values, replace the
head

Defective

④
timing detector
sub Assy

See cause of phenomenon 2

④

3. Missing
of Head dots

Only specific
dots are never
printed

Defective

⑤
input charge
pulse

See cause of phenomenon 2

⑤

Defective

①
contact of the
Head FPC

See cause of phenomenon 3

①

Malfunction

②
of the Head
unit

·Check if paper dust is

caught in the tips of
the head pin

·If the paper dust is

caught, remove it

Defect

③

ive

Timing detector
Assy

See cause of phenomenon 2

④

4. Missing of
Dot Head

All of date are
not printed

Defective

④
input charge
pulse

See cause of phenomenon 2

⑤