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The speed selector
doesn't work
Does
the speed
selector (S15) slide all
the way
back and forth?
(Does it get
stuck?)
Check
the patterns from S15 to Q1 pin
With the speed SW (S15) on 33 is Q1 pin
31 and pin 30
31 "L"'? on 45 is Q1 pin 30 "L"?
When
changing
from
33 to 45 does Q1
pin 11 switch from H to L?
YES
At that time does the voltage at Q2 pin | NO
10
switch
from
approximately
7V
to
ov?
Check the phono motor base board
Check the pattern from Q1 pin 11 to Q2
pin
/
Perfrom
pattern and error checks from
Q2 pin 13 to R24 and 2 pin7
Check from the Q2 pin 10 to the JP6 pin
3
The fader standby
doesn't work
ls there input into the F. JACK?
YES
is the Q10 base OV?
YES
Perform
error checks on Q10 and R16
and
pattern
checks
from
the Q10 col-
lector to Q1 pin 4
Check the JACK connection
Check the pattern from F. JACK to JP5
and the Q10 base
69
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