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Repair
Repairs of the Model-42III Micro Printer are grouped into two cleases (A and B) as defined in Paragraph 2.1 below, according
ing repair class.
2.1
Repair Classification
Class A:
General knowiedge of the construction and operating principle of the printer, as well as basic repair technique
is required. Neither special experience nor trained skill is required.
Class B:
Advanced knowledge of the construction and operating principle of the printer is required.
Techniques
for handling special tools, jigs and measuring instruments in disassembly and assembly as well as
Practical repair experience are required.
2.2 Repair Procedures
Should
a trouble occur, refer to Paragraph
2.4 'Troubleshooting Table" to confirm
the nature and condition of the
ing Table is divided into the following five columns:
When you desire to visually examine the condition of gear trains and the operation of parts operatively associated there-
with, do it while manually turning the motor gear counterclockwise.
1.3 Terminal Contacts Arrangement
Trigger coil (—)
1
Trigger coil (+)
2
Motor (+)
3
Motor (—)
4
Timing Pulse
T 5 O—————o-—c
Reset Pulse
R 6 O——————o-—
Common line for
C 7
detector
Timing Support
t 8 O_o"
Fig. 29
~19-
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