RD-HD5MD/HD7
7
CIRCUIT DESCRIPTION
1. Recordable Disc
No.
Key
Display/Function
1
Connect the oscilloscope to TE1 and VC in X33 pcb
2 Volume/
multi-control
Select [EFBAL ADJU]
3
Load the recordable disc
4 PLAY
[EFBAL MO-W]
5 PLAY
[EF=$
✻✻
MOW]
6 Volume/
multi-control
Write power adjustment. Adjust the waveform as follows.
7 PLAY
Display shows [EF=$
✻✻
MOR] after [EFB=
✻✻
xSAVE]
to save the data in E2PROM.
Mode changes write to read
Focus and disc servo are on. Tracking servo off.
8 Volume/
multi-control
Read power adjustment. Adjust the waveform as follows.
9 PLAY
Save the data in E2PROM.
Display shows [EFBAL MO-P]
PLAY
Display shows [EF=$
✻✻
MOP]
(Pickup travels to search pits and tune the servo to on.)
10 Volume/
multi-control
Adjust the waveform as follows.
11 PLAY
Display shows[EFB=
✻✻
xSAVE]
to save the data in E2PROM.
Display shows [EFBAL CD] disc motor stops.
12 EJECT
Unload disc.
2. Pre Master Test Disc(TGYS-1)
No.
Key
Display/Function
1
Load the disc(TGYS-1).
2 PLAY
[EF=$
✻✻
CD] servo is on
3 Volume/
multi-control
Adjust the waveform as follows.
4
Save the data in E2PROM.
Display shows[EFB=
✻✻
xSAVE] in brief time.
EF PHASE
5 EJECT
Unload disc.
No.
Key
Display/Function
1. CD Error Rate
1
Volume/
multi-control
[CREC-PLAY]
2
Load the test disc(TGYS-1)
3 PLAY
Display shows [CPLAY MID]
Access end
[c=xxxx a=yy] xxxx=C1 error (lower 20) yy=AIDP error
4 STOP
[CREC-PLAY]
5 EJECT
Unload disc.
2. MO Error Rate
No.
Key
Display/Function
1
Volume/
multi-control
[CREC-PLAY]
2
Load the recordable disc
3 PLAY
Display shows [CPLAY MID]
Access end
[c=xxxx a=yy] xxxx=C1 error (lower 50) yy=AIDP error(00)
4 STOP
[CREC-PLAY]
5 EJECT
Unload disc.
No.
Key
Display/Function
1 Volume/multi-control Select [FBIAS ADJU]
2
Load the disc.
3 PLAY
[a=xx yyyy/]
point a
(xx=focus bias, yyyy=C1error)
4
Volume/multi-control Adjust "yyyy" to 220
✻
5 PLAY
[b=xx yyyy/]
point b
6
Volume/multi-control Adjust "yyyy" to 220
✻
7 PLAY
[xx yyyy/] point c
Check "yyyy" within 50
8 PLAY
Display shows [aa bb cc(xx)] focus bias adjust
(aa= point a,bb=b,cc=c )
During this adjustment, the oscilloscope changes in units of
about 2%. Adjust so that the waveform comes nearest to the
specified value. (MO groove read power traverse adjust-
ment)
(Traverse waveform)
Specification : A = B
Notes :
1. Data is erased during MO write when a recorded disc is
used for this adjustment.
2. If the traverse waveform is difficult to be monitored, con-
nect an oscilloscope as shown in the figure below.
* 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.
4-9 Focus Bias Adjustment
Use the special disc(continuous recorded disc)
Focus bias value
C1 error
(TE1)
330k
Ω
10pF
(VC)
Oscilloscope
+
-
4-10 Error Rate Check
4-8 Automatic EF Balance Adjustment
• Automatic EF balance adjustment is performed.
No.
Key
Display/Function
1
Volume
TE B. ADJ
2
Load a recordable disc.
=Low Reflection • Groove
3
TE B. MO-W (Automatic Adjustment Mode Indication)
• Writing Power
Automatic Adjustment
4
Display shows EFB = XXX SAVE in brief time and
Next step
save the data in E2PROM.
5
TE B. MO-R (Automatic Adjustment Mode Indication)
• Reading Power
=Low Reflection • Groove
Automatic Adjustment
6
Display shows EFB = XXX SAVE in brief time and
MD
No.
Key
Display/Function
Next step
7
TE B. MO-P (Automatic Adjustment Mode Indication)
• Reading Power
=Low Reflection • PIT
Automatic Adjustment
8
Display shows EFB = XXX SAVE in brief time and
Next step
save the data in E2PROM.
9
EFBAL CHANGE (Unload a disc)
0
Load a pre-master test disc(TGYS-1).
-
MD
TE B. CD (Automatic Adjustment Mode Indication)
• Reading Power
=High Reflection • PIT
=
Display shows
save the data in E2PROM.
EFB = XXX SAVE in brief time and
EF PHASE menu
save the data in E2PROM.
