14.2 THE UNIT DOESN'T PERFORM INITIAL RESET
Unit doesn't perform ini
tial reset.
With the power ON
Does the tonearm proceed
to the rest?
Does the tonearm stop at YES
Initial reset is complete
the rest?
(OK).
N
O
N
O
Perform mismounting, pat·
tern and soldering checks
on 05, C7 and R10 to 12.
Is 01 pin 3 approximately
5V.
Is 01 pin 27 "L"?
N
O
Perform mismounting pat
,___.._ tern and soldering checks
from the rest SW (PSH-007)
to JP303, 301, CN3 and
01 pin 27.
YES
YES
Perform mismounting, pat·
tern and soldering checks
on the ceramic lock.
Is the oscillation waveform
at 01 pin 1 and 2 visible
on the oscilloscope? "3
MHz"
Are 01 pins 4 and 5 "H"?
N
O
Perform patterns and mis
,___.._ mounting checks from 01
pins 4 and 5 to 03 pins 4
and 5.
OK
YES
YES
Perform
mismounting
checks on L 1 and C6,
and perform a 5V I ine
check on the microcom
puter.
See 14. 6 "The tonearm
doesn't move."
Are both pins 11 and 14
N
O
of 03 approximalety 11V?
YES
Perform mismounting and
soldering checks on the
area from 03 pins 4 and 5
to CN3, JP301, JP302 and
the drive motor.
Perform wiring and sol
dering checks from the
drive motor (PXM-137) to
JP302, 301 and CN3.
14.3 THE PHONO MOTOR DOESN'T TURN (START/STOP)
The phono motor doesn't
START.
Using the locate switch,
move the tonearm from
the rest.
Is the phono motor proper- ,-
N
_G
__,
., With the power
ly connected?
reconnect it.
OFF
OK
Is the phono motor sup
plied with 12V and GND?
YES
ls01 pin 10"L"?
YES
,__
_________
__,
Check JP7, and check the
pattern of the power sup
ply circuit 12V and GND.
NO
Check the patterns from
t-----01 pin 10 to 02 pin 2.
Is JP7 pin 4 approximate-
N
O
ly 0. 5V or more?
Check the patterns from
02 pin 15 to JP7 pin 4.
YES
OK
Check the phono motor
The phono motor doesn't
STOP.
Push the
SIS
SW and move
the tonearm back to the
rest.
Is 01 pin 10 "H"?
YES
Is JP7 pin 4 approximately
0. 1V?
YES
41