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14.7 ELEVATION OPERATION FAILURE
EV
SW
ON
ON
.....c......
-CL..
0 0
0 0
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0
1
0
�=1
i I
A
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i
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i
031
ov�
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Approx
i
mate
:J
y
!
I
L0)
av
I
OV
I
i---��-
I
I
I
[
®
1
2V�
H-
1V--_LJ
:
03
@��j
.... ,--
Check for a faulty mech
anism and whether the
plunger is catch
i
ng on
someth
i
ng.
44
Elevation operat
i
on failure
Place a record on the turntable and move
the tonearm to the play posit
i
on.
Does the UP LED go on and
EV SW?
YES
At that time do 01 pins 6 and 7 alternate
"H" and "L"?
YES
At that time does the voltage of 03 p
i
ns
7 and 8 change from about OV to about 8V?
YES
At that time does the voltage of 03 p
i
ns 9
and
1
0 change from about
1
2V to about
1
V?
YES
Note: The EV UP/ON doesn't work
when the tonearm
i
s on the rest.
Switch failure
Check the patterns and solder
i
ng from
0
1
pins 6 and 7 to 02 p
i
ns 7 and 6.
Check the patterns and solder
i
ng from
02 pins
1
0 and
11
to 03 pins 7 and 8.
Is CN2
OK
properly
connected?
Perform error and pattern
checks from 03 p
i
ns 9 and
10 to R22 and CN3 pin 3.
OK
At that t
i
me do both terminals of the EV
Perform error, connect
i
on, patterns and sol
soleno
i
d draw the follow
i
ng voltages?
�
der
i
ng checks from CN2 (female) to JP20
1
,
020
1
and the soleno
i
d.
L....J ________ .__
av
+
I
�oxima���
JitB
.
- - .
Approximately
:
EV soleno
i
d
Drawing plunger in
1
v
_
I
NO
W
i
th the solenoid leads unsoldered, is the
w
i
nd
i
ng resistance of the soleno
i
d about
1on?
YES
(Be
i
ng careful of which way 0201 is fac
i
ng)
With CN2 (female) removed, do p
i
ns 2 and
3 measure approx
i
mately 70n?
YES
Perform error and pattern checks from 03
pin 9 and
1
0 to R40 and CN2 pin 3.
Faulty soleno
i
d.
Perform mismounting and pattern checks
from CN2 (female) to JP20
1
and 020
1
.