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Rev. 2.00
- 125 -
SRP-275
7-2-2 Printing quality problems
Problem
Probable Cause
Level
Checkpoint
Action
FPC-head
connector is disconnected
with
PCB-head ass
’
y
and
Printer-
head
B
Check if the
FPC-head
is
properly inserted into its
connector of head and its
board
If is not, securely
reinsert the
FPC-
head
Broken common lead of
FPC-head
B
Check the conductivity
between the common lead of
FPC-head
and other
terminals
Replace the HEAD
unit, if there is no
conductivity
FPC
(30pin) between the
PCB-head
ass
’
y
and
PCB-main ass
’
y
is broken
B
Check the conductivity of the
FPC
(30pin)
Replace the
FPC
(30pin) if there is no
conductivity
Positional relationship between
Printer-head
and
Platen
B
Check if the gap between the
platen and the pin of head is
correct value : 0.40
±
0.05mm
Correct the gap
Ribbon cassette
is absent
A
Check
Ribbon cassette
’
s
existence
Insert
Ribbon cassette
HF motor
rotates
normally but
no dot printing
is performed
Input pulse irregularity
B
Check firing input pulse with
an oscilloscope
Replace
PCB-main ass
’
y
Damaged lead in
FPC-head
B
Check the conductivity of
lead of
FPC-head
Replace
FPC-head
Positional relationship between the
head and the platen
B
Check if the gap between the
platen and the pin of head is
correct value : 0.40
±
0.05mm
If incorrect,
performed repair with
reference
FPC
(30pin) is failure or disconnected
between
PCB-head ass
’
y
and
PCB-
main ass
’
y
B
Check the connected
condition of
FPC
and
FPC
failure
Make sure the
connection and
replace the
FPC
A certain dot
does not print
Defective
Printer-head
B
Check head response to
command with oscilloscope
Replace
Printer-head
Belt tension is loose
B
Check
Spring-lever-tension
for deformation
Replace or
reassemble
Spring-
lever-tension
Carriage drive area contamination
B
Check gears and pulleys for
dirt deposits or other foreign
matter
Remove any dirt
deposits or foreign
matter
Character
width changes
irregularly
Carriage drive parts wear or damage
B
Check if there are defective
parts among gears
Replace defective
gear
Ribbon cassette
is exhausted
A
Check for ink of ribbon
cassette
Replace
Ribbon cassette
Head gap is not correct between
head and platen
B
Check the gap
If incorrect, performed
repair with reference
Print is very
faint
Defective
Printer-head
B
Check head response to
command with oscilloscope
Replace
Printer-head
Содержание 2 COLOR THERMAL PRINTER SRP-275
Страница 1: ...Service Manual SRP 275 Impact Printer Rev 2 00 http www samsungminiprinters com ...
Страница 52: ...Rev 2 00 52 SRP 275 Bottom view ...
Страница 63: ...Rev 2 00 63 SRP 275 4 4 8 Ethernet Interface IFC E TYPE ...
Страница 65: ...Rev 2 00 65 SRP 275 4 5 Schematic Diagram 4 5 1 Main Circuit Diagram ...
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Страница 67: ...Rev 2 00 67 SRP 275 ...
Страница 68: ...Rev 2 00 68 SRP 275 ...
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Страница 70: ...Rev 2 00 70 SRP 275 ...
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Страница 72: ...Rev 2 00 72 SRP 275 ...
Страница 73: ...Rev 2 00 73 SRP 275 ...
Страница 74: ...Rev 2 00 74 SRP 275 4 5 2 Head circuit diagram ...
Страница 75: ...Rev 2 00 75 SRP 275 4 5 3 Serial Interface Diagram RS 232C ...
Страница 76: ...Rev 2 00 76 SRP 275 4 5 4 Parallel Interface Diagram IEEE 1284 ...
Страница 77: ...Rev 2 00 77 SRP 275 4 5 5 USB Interface Diagram Universal Serial Bus ...