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CD-X9G/H/E
CD-X9G/H/E
Wave
forms CD Circuit
IC700
, Between Ping and 16
2 V/1
mS (DC)
*
No defect
Center
112
Vee
(when playing
baek the disc)
TP1
Pin 1 HF
0.2 V/0.5pS(AC)
(When playing back the disc)
Spin motor PWM output
(When playiogbaf::kdisc)
. 2 V/lOpS(DG:)c_.
r
"IC780Prri4
PWM1
GND--o-
IC 780 Pin5
PWM2
GND-
®
le750 Pin4(HFOK)' .
3.6VI--------;---"---;:---
"'---- FOCUS ON in
playback mode
and test mode: 3.6
Vi
or
In stop mode: 0
V
OV
1-'-..:.-..:.-...;,..;,.;.-"'-':-----'----=----
In stop mode: 0 V
If the disc rotates and the
HF
signal is tuned with the internal
signal of IC780, "H" level appears.
@
Je780 Pin19 (SYCLK)
,
,!
If defect exists on the disc and in track search mode the
pUlse~liI<e
"L'~
level appears as shown below.
}
In playback mode: 4.8
V
I
'\i
4.8V
I-~~-----___,·Ir__,II-
ICBOO Pin10 Pin11
f
t
Rch
Lch
1 kHz 0 dB
(When playing back the disc)
1 V/O.5
mS lAC)
IC800 Pin4
2
V/0.1j.1S!DC)
(When playing back the dise)
®
IC7S0 Pin15
0.5 V/O.5pS
(AC)
(When playing back the dise)
I
I
l
I
TP1 Pin3 (TE)
In playback mode
0.2 V
11
mS (DC)
Center
112
Vcc
--0-
Center
112
vcc-«
200
mV
10.5 S
(DC)
Center 1/2 Vec
®
TP1 Pin3 (TE)
In TEST MODE 3
0.2 V/1
mS (DC)
CD
IC705 Pin30
(FS-OUT)
In TEST MODE
2
(The lens is moved up and down.)
Defect to disc
(ditto)
Center
112
Vcc
(when playing
back the disc)
*
The storage oscilloscope was used for measurement. (On the
ordinary oscilloscope the bright point appears as triangular
wave as shown above.)
Center
1
12
Vee -
Center 1/2 Vce
(when playing
back the disc)
If'defect exists, Pulse-like noise as shown above appears.
(Similar noise is found also in IC701 output and TE, FE signals.)
CD
IC701
Between Ping and 16
0.5 V/0.5 mS (DC)
CD
TP1 PingS
(FE)
50 mV/2 mS (DC)
-51-
-52-'--
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