Sanyo FISHER DVD-1500 AU, Service Manual

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FOCUS DRV.
IC601 25pin
FE
TP513
TE
TP512
SLED
IC601 20pin
VRA
DiskDistinction
ServoAdjust.
Inner
From Exter From inner
Data read
ServoAdjust.
Exter
INIT Attention
Fsearch
2. Automatic servo alignment
Contents of the servo alignment and the alignment method
1) Tracking balance
2) Focus balance
3) Focus gain
4) Tracking gain
5) RF gain
Set by the command the micon, reading the correction value of the TC9461, gives to the TA1254.
6) RF equalizer (DVD only)
The micon, monitoring the error rate (TC90A41), sets a PWM data (TC90A41) and provides a voltage for the TA1254.
Performed automatically by the TC9461 based on the command
given by the micon (microcomputer)
to PU
Equalize voltage
to PU
Micon I / F
DVD : PLCK (27MHz)
CD : BCK (1.4MHz)
DVD : TC90A41F
CD : TC9461F
TC9461F
TC90A41F
Micon Setting
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
VCKF
VccP
LVL
TEO
FEO
DFTN
VssS
RPZ
RPO
RPB
RPP
RFO
NC
NC
VccR
DPDB
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
P2FN
P2FP
GNDS
P2DI
P2CI
P2BI
P2AI
LDP2
GNDR
P1AI
P1BI
P1CI
P1DI
LDP1
P1FP
P1FN
TEB FEB PSC Vcc2 NC EQD GND2 RFDC RF
A
EQB EQF MDI1 LDO1 P1TN P1TP NC
VRCK
SCD
SCL
SCB
DPD2 DPD1
DPBD
DP
A
C
Vdd VrD
VrA
MDI2
LDO2 P2TN
P2TP
GND
F-gain
Adjustment
F-gain
Adjustment
T-gain
Adjustment
R-gain
Adjustment
TE-gain
Adjustment
FTE-gain
Adjustment
Level
Detection
BUS
Time
Constant
Adjustment APC2
APC1
3BTE
Generation
DPDTE
Generation
FE
Generation
RF Ripple
Generation
EQ
sel-DPD
sel-LVL
sel-FE
sel-PD
sel-RF
sel-TE
mode-IC
mode-TE
DVD P.W.BOARD OPERATION
An automatic alignment method (e.g.
automatic alignment sequence) varies with
the version of the micon. In any case, it is
important to recognize that the above-
mentioned alignments are conducted
regardless of the version.
Amp mode setting
focus gain: F-gain, FE-gain
tracking gain : T-gain, TE-gain
RF gain : R-gain
TE : mode-TE (DPD or 3beam)