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ee
a
@ sonvenswe
WQ-CH400H/450H
WQ-CH400L
@ winscoc)
*No dafect
1CcB04
Bestwean
Pini
ane
2
Potentlal
difference
(When
Playing
back
the diso) y
'Defect
to disc
(ditto
Potentlal
dif
ference
OV:
(When Playing.
6
baok the disc)
©
If defeot
exists. Pulse-Ilke
noises
as shown
above
appears.
¢ miter nalse
1s found
also
[tn
output
and
TE. FE slenals. }
2)
(2) 0.5/0 5mS(D0)
cao4
(Wren Playtng.
a.
back
the disc)
TPS8O1
Prn1{FG1)
and
6(1/2Vo0)}
Center
'2Vcc —
(When Playing
back the disc)
@o
SuSCAc)
Pini (nang
GND
Sar
ee
TINK seannvns ny
HA AX YKYK XW
reece pain
eee acces
Ele
ee 223
(When Playing.
g
back
the disc)
5]
Fe MODE oi
SAV
iC)
1 PinS¢TEtend
&
Center
1/2Vcc —fE
I]
laYback
mode
OV AmDC)
TP41
Psn3(TEdend
8
Center 1/2Vcc
In JEST MODE 2
(The
lens 18 moved uP an
200mVvO, 2S(DC)
a
Center
1/2Vcc —
*Tne storage osci | loscope was used for
measurement. (On the ordinary
oscil ! loscope
the bright
Polnt
aPbpears
as triangular
wave as shown above. )
@
Ree, motor PWM output
a), Dlay) ne. pack tne disc)
og es re Me connect
IC802 PIn38
and GND
PWM 4
Kk
Pin37
and GNO
M2
5SOmv/0. SuS(AC)
Use10:1
Probs to connect
10780 Pint5
end GND
neces RREKRKAKY
\ ARK EKO
2V/50nS (DC)
(When playing back the disc)
I1C803 Pin3
and GND
© xx. cB
(When Playing back the test disc)*
0. 5V/0 SmSCAC)
__
ICBO3 P1in& Ptn6
and GND -
Roh
Lon
@® 2vavioe
Playback
or
Focus
on
>.
sods,
"for
test
mode :35V—
In stop moda:OV—
@ 2vaivioey
10780
PiniS
(SYCLK)
and
GND
If defect exIsts on the disc and in
track
search
mode
the
Pulse—| tke
Jevel
appears
as shown
below.
Ps
os
In Playback mode:4. 8V_ 4
aap
In stop mode:OV— pppoe
iter TM.
lf the
disc
rotates
and
the HF signal
is tuned with
the Internal
sténal
of IC."
H
level
appears.
-45-
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