Technics SL-P250 - Page 42

e 1C103 (AN8377): BTL drive
1/0
Division
Driver power supply (+5 V input)
Power supply (+5 V input)
External transistor base
driving output
el
ft
an VMON | oo | Voltage (+5 V) output
Pe |
SL-P250 SL-P250
Vo
Division
Inverting output of tracking
driver
Non-inverting output of
tracking driver
Inverting output of focus driver
Non-inverting output of
focus driver
Inverting output of traverse
driver
Non-inverting output of
traverse driver
a Reset signal output
PC input (connect to GND)
Mi TROUBLESHOOTING GUIDE
SL-P250 Operation Sequence Check Sheet
Play Operation Sequence
(with no disc loaded)
Forced traverse return Laser diode comes on.
[Forced traverse return | -{_taser diode comes on. |
1
|
I
|
|
Stop
|
Spindle
motor
starts
rotation.
I
Disc loading
|
- Disc tray closed.
: !
|
|
! !
| DSL (data slice) operation
| ———, -—-—--- nt
|
Focus
pulled
in.
|
Play
operation
+
-
I
e—
—
—
—
—
4
|
PLL
operation
|
|
|
Spindle
motor
starts
rotation.
l
| CLV servo operation
I
|
(11T
mode)
| Focus servo operation !
|
| |
|
Tracking
servo
operation
|
CLV
servo
operation
|
|
(phase
compare
mode
|
|
ae
7
!
{
TOC
reading
_
|
Data
demodulator
circuit
u.——
—
—
—
4
|
|
operation
| DSL (data slice) operation
I
|
|
;
L
Access
control
circuit
I PLL operation | operation
| 4
|
| CLV servo operation STOP key pressed.
(11T mode)
|
|
I
I
| CLV servo operation
| (phase compare mode)
|
l
| 2
TOC data display
|
l
ay ee
etn