Brother SC-2000, Service Manual, Page: 142 / 150

IV - 2
Cause of Electronic Error
Error mode Checking method Cause Action Service manual
No key-in is
possible. Is there a key
pressed? YES Defective
control panel
PCB assy.
Improperly
attached
control panel
Replace the
control panel
PCB assy.
Replace the
control panel.
_
NO Defective #13 Replace the
main PCB
assy. CHAPTER III
1.15
Size Detection,
Ribbon Cassette,
Open Cover
Detection, and Key
Scanning Circuit
Printing is
performed with a Is the thermal
head dirty? YES Dirty thermal
head Clean the
thermal head. _
given dot omitted.
NO Defective
thermal head Replace the
thermal head. _
No printing is
performed. Is the thermal
head voltage
within 19V
±
0.1V
when printing?
YES Defective
thermal head Replace the
thermal head. CHAPTER III
1.3
Thermal Head
Drive Circuit
NO Defective #17
and #19 Replace the
main PCB
assy. CHAPTER III
1.4
Thermal Head
Power Supply
Control Circuit
The size of a stamp
can not be correctly
detected. Are the stamp
size detection
switches
properly turned
on/off? YES Defective #13 Replace the
main PCB
assy. CHAPTER III
1.15
Size Detection,
Ribbon Cassette,
Open Cover
Detection, and
Key Scanning
Circuit
NO Defective size
detection PCB
assy Replace the
size detection
PCB assy. CHAPTER III
5
SIZE
DETECTION
CIRCUIT
A draft sheet or an
ID label that is fed
manually can not be
detected. Does the
manual feed
detection
reflective sensor YES Defective #19 Replace the
main PCB
assy. CHAPTER III
1.19
Reflective Sensor
Circuit
function
correctly?
NO Defective
reflective
sensor assy Replace the
reflective
sensor assy. CHAPTER III
6
REFLECTIVE
SENSOR ASSY
CIRCUIT