Bixolon Receipt Printer SRP-270 Manual De Usuario

 

8-6-3 Repair Guidelines 
 
Phenomenon 

Condition 

Cause 

Level

Check point & Method 

Repair Method 

①

Defective  

power input to 
motor 

B 

·Check the input 

power 

·Check the input 

voltage (24V±2V) 
between the 
motor terminals 
of the connector 
using a tester or 
oscilloscope 

·Inspect and repair 

the power 
supply circuit 

 

②

Defective 

motor drive 
signal 

B 

·Check input signal 
·Check if the signal 

is being input 
to the motor drive 
terminal of the 
connector using 
an oscilloscope 

·Replace the 

drive signal 
generating 
circuit 

 

③

Damaged 

or Improper 
connection 
between 
motor terminals
of the 
connector 

B ·Check 

the 

conductivity 

between the 
pertinent terminals 

·Replace the main 

circuit board Assy 
if there is no 
conductivity 

·If improperly 

connected, 
reconnect 
the pertinent 
leads in the proper 
manner 

④

Defective 

motor 

B 

·Apply 24V to the 

leads of the 
motor then check 
the rotation 
(red: + black: -) 

·Replace the 

motor, if it 
does not rotate 

 

1. Motor 
does not 
rotate 

Motor does not 
rotate despite 
printing  
command 
has been given 

⑤

Occurrence 

of paper jam 

A 

·Check the deformation 

of Head pin guide or 
platen paper guide 

·Replace Head 

pin guide or platen 
paper guide if they 
are deformed or 
destroyed 

Head FPC

①

 

is disconnected
from it 
connection 

B 

·Check if the head FPC 

is properly inserted 
into its connector 

·If not, securely 

reinsert the head 
FPC 

Broken 

②
common 
lead in head 
FPC 

B ·Check 

the 

conductivity 

between the common 
lead of head FPC and 
other terminals 
(20Ω±10%) 

·Replace the 
head unit, if 
there is no 
conductivity 

Common 

③
lead between 
the head FPC 
and connector 
is broken 

A ·Check 

the 

conductivity 

of the common 
lead section 

·Check the voltage 

(28V±2V) 

·Replace the main 

circuit board Assy 
if there is no 
conductivity or 28V 

2. No dot 
printing 
is performed 
 

Motor rotates 
normally but no 
dot printing is 
performed 

Defective

④

 

timing detector
sub Assy 

B ·Observe 

by 

oscilloscope 
to check if a timing 
signal is being 
generated 

·Replace the timing 

detector sub Assy, 
if no timing signal is 
being generated