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cT-F95Cl
13. TROUBLE SHOOTING
7*
C O N D I T I O N
C A U S E A N D R E P A I R
r Fluorescent indicator lamps (level meters and
tape counter) do not light up, even though
voltage is applied to the filament.
r Defective Qzor (2SA733) in the indicator
assembly.
Level meter segments (see Fig. 13-1) fail to
light up even though the numerals and the
tape counter are on.
F i s . 1 3 - 1
r Load a recorded tape or test tape and check
the presence of an input signal.
r Defective
lCaor (TA?318P)
or
lCaoz
fuPC324) in the indicator amplifier assembly.
r Only
one, or
two,
columns
in the tape
counter light up.
Defect in the parallel vinyl-covered leads
connecting the indicator assembly to the
indicator amplifier assem bly.
Defective lCaoo (PD4004) in the indicator
amplifier assembly.
I
I
r One of the segments in the tape counter digits
fails to light up (see Fig. 13-2).
,
Segment
F i s . 1 3 - 2
t l _ ,
t l ,
Ir-t
t I ,
V
t_t
Defective soldering of a component in the
indicator assembly (if
the level meter is
operating normally).
r Defective ICaoc (PD4004) in the indicator
amplifier assembly (if the level meter is not
operating properly).
r OnlV one of the level meter segments lights
up, or else the segments light up and tum off
again rather sporadically.
r Defective ICsoe (PD4004).
The level meter numerals do not light up.
r Defective soldering of componen(s) in the
indicator assembly.
r A break in the parallel vinyl-covered leads
connecting the indicator assembly to the
indicator amplifier assembly.
r Level meter and tape counter lamps are rather
dull.
r Defective Qzor (2SA733) in the indicator
assembly.
I Tape counter does not return to 000 when
the COUNTER RESET is pressed.
r Defective lCsor (PD4004).
r Defective COUNTER RESET push-button.
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