SATO TG308, Service Manual

Page: 132 / 252

Section 5: Troubleshooting
Page 5-12
TG3 Series Service Manual
5.2 TROUBLESHOOTING FLOWCHART (Cont’d)
5.2.3 Print Problems (Cont’d)
Category Symptoms Causes Remedy Maintenance
Abnormal
print
YES
Print is too
dark
Adjust print
darkness
Refer to 6.12
Adjusting Print
Darkness
Replace
thermal head
Refer to 7.2
Replacing Print
Head
NO
YES
NO
Is thermal
head position
OK?
Replace Main
PCB (CONT
board)
Refer to 7.11
Replacing Main
(CONT) PCB and
Calendar IC
NO
Is print
darkness set
properly?
Adjust print
darkness
Adjust head
position
Refer to 6.16
Adjusting Print
Head Position
Refer to 6.12
Adjusting Print
Darkness
NO
Is thermal
head clean?
Clean the
thermal head
YES
One side of
print is lighter
than the other
Replace platen
roller
Refer to 7.3
Replacing Platen
Roller
NO
Is data
printed evenly
balanced across
the paper?
YES
Adjust thermal
head balance
Refer to 6.16
Adjusting Print
Head Position
Print is too
light