SRP-270

Phenomenon

Condition

Cause

Level

Check point & Method

Repair Method

2. No dot

Motor rotates

Defective

B

·Observe by

·If input pulse is

printing

normally but no

input charge

 

oscilloscope

not generated or

is performed

dot printing is

pulse

 

to check if the input

if such pulse is

 

performed

 

 

charge pulse is within

outside rated values

 

 

 

 

rated values

repair the driving

 

 

 

 

·Pulse rating:

control circuit

 

 

 

 

For voltage and pulse

 

 

 

 

 

width refer to the

 

 

 

 

 

specifications for

 

 

 

 

 

SMP-710/710N

 

 

 

Positional

B

·Check if the gap

·If incorrect, perform

 

 

relations-hip

 

between the Platen

repair according

 

 

between

 

and the tip of

to "Adjustment"

 

 

head and

 

head is correct

 

 

 

the platen

 

correct value :

 

 

 

 

 

0.51±0.1mm

 

3. Missing

Only specific

Damaged

B

·Check the conductivity

·If there is no

of Head dots

dots are never

lead in head

 

between the pertinent

conductivity,

 

printed

FPC

 

common lead of the

replace the head

 

 

 

 

head FPC and other

 

 

 

 

 

terminal

 

 

 

Lead

B

·Check the conductivity

·Replace the main

 

 

breakage

 

between the pertinent

circuit board Assy if

 

 

between

 

terminals

these is no

 

 

connector and

 

 

conductivity

 

 

FPC terminals

 

 

 

 

 

Damaged

B

·To check if the

·If the resistance is

 

 

lead of a dot

 

resistive value of the

outside rated

 

 

driving coil

 

pertinent dot driving

values, replace the

 

 

 

 

coil is within rated

head

 

 

 

 

values, measure the

 

 

 

 

 

resistance of the

 

 

 

 

 

terminal between

 

 

 

 

 

connectors Rated

 

 

 

 

 

value : 20Ω±10%

 

 

 

Defective

B

See cause of

phenomenon 2

 

 

timing detector

 

 

 

 

 

sub Assy

 

 

 

 

 

Defective

B

See cause of phenomenon 2

 

 

input charge

 

 

 

 

 

pulse

 

 

 

4. Missing of

All of date are

Defective

A

See cause of phenomenon 3

Dot Head

not printed

contact of the

 

 

 

 

 

Head FPC

 

 

 

 

 

Malfunction

B

·Check if paper dust is

·If the paper dust is

 

 

of the Head

 

caught in the tips of

caught, remove it

 

 

unit

 

the head pin

 

 

 

Defective

B

See cause of

phenomenon 2

 

 

Timing detector

 

 

 

 

 

Assy

 

 

 

 

 

Defective

B

See cause of phenomenon 2

 

 

input charge

 

 

 

 

 

pulse

 

 

 

Rev. 3.02

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Page 69
Image 69
BIXOLON SRP-270 service manual Rev