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Technics SL-P999 Service Manual

Technics SL-P999
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SL-P999
Mi
TROUBLESHOOTING
GUIDE
SL-P999
Operation
Sequence
Check
Sheet
Play
Operation
Sequence
Power
on
(with
no
disc
loaded)
Forced
traverse
return
Disc
detection
Disc
loading
pe
aG
se
eae
a
ee
ee
See
eae
Disc
tray
closed.
Laser
diode
comes
on.
Focus
pulled
in.
Spindle
motor
starts
rotation.
Focus
servo
operation
Tracking
servo
operation
Traverse
servo
operation
DSL
(data
slice)
operation
PLL
operation
CLV
servo
operation
(11T
mode)
CLV
servo
operation
(phase
compare
mode)
TOC
data
display
PLAY
key
pressed.
Laser
diode
comes
on.
Spindle
motor
starts
rotation.
Focus
servo
operation
Traverse
servo
operation
DSL
(data
slice)
operation
=
4
PLL
operation
CLV
servo
operation
(11T
mode)
CLV
servo
operation
(phase
compare
mode)
Data
demodulator
circuit
operation
vl
»
<
|
[e}
no}
©
|
®
=
|
>
|
a
pe
S=3]
4334S
SS
SS
SS
SS
Sa
SS
ee
Access
control
circuit
operation
STOP
key
pressed.
(Operation
Sequence
Just
After
Power
On)
(no
disc
loaded)
@
Power
supply
failure:
¢
Voltage
regulator
e
1011,
52,
104,
Q12,
14,
51,
FL
display
came
on?
@
Microprocessor
failure:
@
Microprocessor
failure:
@
Loading
motor
driver
failure:
¢
1C403,
Q453,
454,
motor
@
Close
switch
failure
@
Traverse
control
system
ickup
move
t
pickup
oward
¢1C102,
traverse
coil
©
1C103,
potentiometer
Stops
after
making
focus
pull-
in
operation
for
approx.
5
sec.
SL-P999
SL-P999
(TOC
Read
Operation-PLAY
Operation)
Open/Close
switch
pressed.
@
Microprocessor
failure
(10401,
601)
@
Operation
key
switch
failure
@
Tray
open
switch
failure
Has
the
tray
opened
and
stopped?
Yes
Load
a
disc
and
press
the
Open/Close
switch.
@
Microprocessor
failure
(IC401)
Has
the
tray
closed
and
stopped?
@
Operation
key
switch
failure
@
Tray
close
switch
failure
Yes
Pickup
failure:
®
Laser
diode
No]
@
Control
system
failure:
©1C101,
Q101
@
Microprocessor
failure:
Laser
diode
came
on?
¢1C401
Laser
diode
turn-on
check
method
Remove
the
disc
then
close
the
tray,
and
the
laser
diode
will
come
on
for
approx.
5
sec.
Yes
@
Microprocessor
failure:
¢1C401
@
Controt
system
faiture:
©1101,
102
Does
focus
lens
make
vertical
movements?
@
FO
error
amp.
failure:
©
1C101,
102,
103
@
Pickup
failure:
¢
Focus
coil
Yes
@
Microprocessor
failure:
e1C401
No]
@
T.T.
drive
system
failure:
©
(C301,
403,
Q451,
452
©
Q404
Spindle
motor
started
rotation?
Spindle
motor
Yes
Focus
servo
locked?
Yes
Tracking
servo
locked?
Yes
Traverse
servo
operation
normal?
Yes
Has
DSL
circuit
entered
the
Normal
mode?
Yes
RF
signal
amplitude
regulated
at
the
output
of
AGC
circuit?
Yes

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Technics SL-P999 Specifications

General IconGeneral
BrandTechnics
ModelSL-P999
CategoryCD Player
LanguageEnglish

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