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Casio DR-120XA User Manual

Casio DR-120XA
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— 4 —
1) Does not work
at all.
2) No display.
3) No print.
4) Poor display.
5) Poor printing
• Motor does
not stop.
Missing of
digits.
Refer to the printer service manual published separately.
VDD, VSS, VM, VF1, and
VF2 are OK?
Check the pulse signals
from LSI.
If VF1, VF2, Digit and
Segment signals are OK.
VM=17V (while printing)
Check detector of printer
block and timing signal.
Secondary voltage
of transformer
Waveforms of each
pin
VF1, VF2
Signal D1 ~
S1 ~
Between LSI and
display tube
Trouble Cause Checkpoint Note
5. TROUBLESHOOTING
Defective power transformer
Defective LSI
No voltage at VF1, VF2
No digit signal or no segment
signal
Defective display tube
Poor voltage VM
Defective motor
Defective LSI
Short or open circuits between
digit signals and segment sig-
nals.
Defective display tube
Timing signal is bad.
Defective printer magnet

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Casio DR-120XA Specifications

General IconGeneral
BrandCasio
ModelDR-120XA
CategoryCalculator
LanguageEnglish

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