Technics SL-P250 - Page 29

TROUBLESHOOTING GUIDE 0
|
:
Q201 (2SD1862)
@. Microprocessor Circuit
+ IC-601 04152611)
[C-401 (N1554PEP)
FOCUS LOOP READ-
PLAYBACK
FLOW
CHART
CL
BGT
wR
PS
as
Exnonr
—
|
COMPULSORY
TRAVEVERSE
RETURN
OPERATION
ACCESS
CONTROL
|
@
CIRCUIT
OPERATION
:
row
saiTai]
|
z
ri
ON
—
|—J]DISC
DETECTION
OPERATION
(YES/NO)
Yes
BA4558)
WO
DISC)
LASER
DIODE
(LED)
1-201
(SVICBA4S58)
|
Q11
(2881240)
,
012
(2SB1
238)
|
STOP OPERATION
=
=
{[S DISC TRAY IN CLOSED
CONDITION?
Ic-4
@). Loading Motor Drive
-6FBRC8S)
Motor OWN:
[C-402 (BA4558)
0401 (2SD1862)
0402 (2881240)
@. Close Switch (SSPD17)
MODE
64
>
«25 le
ra
S|
i TEER
2
=
DISC TRAY OPEN/CLOSE OPERATION
a
25
Re
= LASER DIODE (LD ON) TURNED ON DOES OPTICAL PICK-UP MOVE
@
TOWARD THE [NNER CIRCUMFE-
=
FO
(FOCUS)
LEAD-IN
OPERATION
MODE
Yes
a SPINDLE MOTOR ROTATION MODE
Hl.
i
Q181 (2901662)
Q182 (2881240)
Traverse Coil (SORD38-
. Speed Position Sensor
(EWS7L0A00053)
«
2
BS
FOCUS LEAD-IN OPERATION
CIF THERE IS NO DISC LOADED
OR NO FUNCTION, OPERATION
STOPS IN ABOUT 5 S&C)
ca TR (TRACKING) SERVO OPERATION MODE) @| TOC READ OPERATION ~ PLAY OPERATION
=
z\«
= FO (OCUS) LOOP SERVO OPERATION
2
8
«
R
3
S
:
S
=
«
= TRV (TRAVERSE) SERVO OPERATION
e
a
S :
DSL ATA SLICE) OPERATION
:
a
5
— DATA DEMODULATION
STOP KEY OPERATION
= PLL (PHASE LOOP LOCK) OPERATION
i
STOP
MODE
.
Operation
Key
Matrix
CLV (LIT MODE OPERATION
. Tray Open Switch
=
CLY
(FINE
SERVO
MODE)
OPERATION
=
TOC
DATA
READ
AND
DISPLAIED
(@. Microprocessor Circuit
IC-401 N1554PEP)
. Operation Key Matrix
STOP OPERATION . Tray Close Switch