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9.
Never carry an electronics assembly face downward as the power
supply module may faU out.
Do not allow reels or flanges to scrape on the painted surface of the
trim plate as this will mark it badly
.
Scraping can be caused only by
bent ree Is or flanges which, if they cannot be repaired should be dis
carded.
10.
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J
TROUBLESHOOTING
Failure of the recorder to operate properly may be caused by a malfunction
in the recorder, or by external causes.
Before troubleshooting the recorder, verify
that the power and signal connections are correct, and that all of the operational
controls are properly set.
Some of the troubles most likely to be encountered are presented in table
8.
However, the best troubleshooting tool is a familiarity with the equipment and a
thorough understanding of its theory of operation
.
Table
8.
Troubleshooting
SYMPTOM
CAUSE
CORRECTION
TRANSPORT
1.
Transport stops when
leade r tape pa sses photo
cell VbO. particularly after
machine warms up.
Photo resistor V60
is too sensitive.
Temporary: mask cell or
lamp with one or more
thicknesses of white splic
ing tape. Permanent:
change va lue of R 71 to a
lower value best deter
mined by test. Be care
ful to avoid grounding any
wiring on the circuit boa rd
or cell leads.
M64 PAR 2-71
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