Pioneer CRT3452 Service Manual page 79

5
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Outline
[Stage 3] is used for measuring a servo system. (LD ON to focal close)
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Operation Flow of [Stage 3]
Stage 3 Focal Close Mode
OEIC Gain Automatic Adjustment
Switching Value Display
30330000 30240000
S Curve Carriage Move to
Mode IN Outer Circumference
30090000 30100000
[30100000] and [30110000] move
while the execution key (DISC key)
is being pressed.
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Example of Test Execution
•
S curve measurement:
Enter the [30130000] to [30090000] Measurement Mode.
→ [30080000] Measurement (An up and down movement is repeated at a fixed cycle in the S curve mode.)
→ Turn off the S curve mode for [40130000] of [Stage 4].
•
Focus servo system measurement/Go to the next stage: Execute [30130000] and [300080000] in this order.
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Contents of Test
Command Test name
number
30330000 OEIC gain switching ** Factory Mode **
30240000 Automatic
adjustment value
display
30040000 Replayed status
display
30020000 Return to Stage 1
30050000 Return to Stage 2
30080000 Folcal close
30130000 Turn on the LD
↓
30090000 S curve mode IN
30100000 Carriage move to
outer circumference circumference
30110000 Carriage move to
inner circumference circumference.
30220000 EQ measurement
mode
5
6
Stage 3
Select an LD (laser diode) which matches
Replayed Return to
Status Display Stage 1
30040000 30020000
Carriage Move on
Inner Circumference
30110000
Test Start
10940000
To Stage 1
Test contents
Execute test contents:Press the DISC key.
Return to command number display:
Re-press the DISC key.
Switch an OEIC gain.
Displays an automatic adjustment
result of a servo system.
Displays a replayed status.
Returns to Stage 1.
Returns to Stage 2.
Moves up and down the actuator
to the focus direction.
When a focal close condition is .
satisfied, turn on focal servo
Executes the ON/OFF of laser diode
(LD).
Turn on/off the S curve confirmation mode.
Moves the carriage to the outer
Moves the carriage to the inner
** Factory Mode **
Forcibly turn on the servo of focus
and tracking and check the
characteristics of servo ED.
XDV-M8357ZT/UC
6
7
LD which turns on for [30130000]
a disc type selected for [Stage 2]
[20070000].
Return to Focal Close
Stage 2
30050000 30080000
Servo Start
TB Automatic
Adjustment
20060000 40280000
To Stage 2 To Stage 4
connector (CN101).Besides, because this mode
Test contents selection item setting Return value
Selection switching:Pressing the
TRACK UP/DOWN key
A High/Low gain is selected.
[30331000] gain High
[30330000] gain Low
An adjustment value to be
displayed is toggle-selected.
Display at selection
"0"[30240XXX]
"1"[30241XXX]
"2"[30242XXX]
An LD to be turned on/off is
selected.
[30130000] DVD LD (650 mm)
[30131000] CD LD (780 mm)
7
8
From Stage 2
Servo
Initialization
20060000
LD ON
30130000
EQ Measurement
Mode
30220000
∗∗ At [30220000] Execution, because the
pickup may be damaged, remove pickup
is a factory verification mode, it is
not used usually.
00000000(for Low gain)
00000001(for Low gain)
Refer to the appended
table.
00000000(at Servo OFF)
01010101
(Servo initialization state)
02020202(at focus servo ON)
ID number (at DVD replay)
MSF number (at CD replay)
00000000
00000000
00000000
00007801 (at CD LD ON)
00007800(at CD LD OFF)
00006501(at DVD LD OFF)
00006500(at DVD LD OFF)
00000000
32100000
32110000
00000000
8
A
B
C
D
E
F
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