MD Mecha.
Key1,2
(MDM-07)
2
2
3
4
X09,IC53
System IC
(LC75343M)
X29,IC51
3
Microcomputer
3
PLL IC
(LC72131)
M30622MCAB30FP
3
X09,IC22
Protect
6
Type
CD DSP IC
Power
(MN662748RPMFA)
2
Mute
Standby LED
2
Remote Control Sensor
CD Mecha.
Reset
(D40-1734-05)
CE
Main clock oscillation
Sub clock oscillation
MDX-G1
7
CIRCUIT DESCRIPTION
No.
Key
Display/Function
1. CD Error Rate
1
4
¢
[CPLAY MODE]
2
Load the test disc(TGYS-1)
3 MD
6
Display shows [CPLAY MID]
Access end
[c=xxxx a=yy] xxxx=C1 error (lower 20) yy=AIDP error
4 STOP
[CPLAY MODE]
5 EJECT
Unload disc.
2. MO Error Rate
No.
Key
Display/Function
1
4
¢
[CPLAY MODE]
2
Load the recordable disc
3
MD
6
Display shows [CPLAY MID]
Access end
[c=xxxx a=yy] xxxx=C1 error (lower 50) yy=AIDP error(00)
4 STOP
[CPLAY MODE]
5 EJECT
Unload disc.
No.
Key
Display/Function
1
4
¢
Select [FBIAS ADJU]
2
Load the disc.
3
MD
6
[a=xx yyyy/]
point a
(xx=focus bias, yyyy=C1 error)
4
4
¢
Adjust "yyyy" to 220
✻
5
MD
6
[b=xx yyyy/]
point b
6
4
¢
Adjust "yyyy" to 220
✻
7
MD
6
[C=xx yyyy/] point c
Check "yyyy" within 50
8 MD
6
Display shows [aa bb cc(xx)] focus bias adjust
(aa= point a,bb=b,cc=c )
* Notes :
1. The relation between the C1 error and focus bias value
is shown in the figure below. Points "a" and "b" in the
figure are detected by the above adjustment. Focal
position "C" is automatically obtained from points "a"
and "b" by calculation.
2. The C1 error rate fluctuates. Therefore, perform the
adjustment according to the observed mean value.
6-9 Focus Bias Adjustment
Use the special disc(continuous recorded disc)
Focus bias value
C1 error
6-10 Error Rate Check
No.
Key
Display/Function
-
MD
6
TE B. CD
(Automatic Adjustment
Mode Indication) = High Reflection • PIT
• Reading Power
=
MD
6
Display shows
EFB = XXX SAVE
in brief time and save the data in
E2PROM.
TE B. ADJ
menu
7. Microcomputer
7-1 Microcomputer Periphery Block Diagram
www. xiaoyu163. com
QQ 376315150
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TEL 13942296513
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TEL 13942296513 QQ 376315150 892498299
