cd/vcd pickup specifications

cd/vcd pickup specifications
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 1 -
CD/VCD PICKUP SPECIFICATIONS
MODEL:KSS-213C(FOR KSM-213CCM)
Smartech Electronics and Machinery Manufacturing Co.
3306-3305 BLDG33 No.118 Xiangxi Road
Zhuhai, Guangdong,519000 P.R. China
http://www.vcdpickup.com zhimpexp@pub.zhuhai.gd.cn
LTD.
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
CONTENTS
1.
Scope
of
Document
2.
Evaluation Conditions
3.
Absolute Maximum Rating
4.
Performance Specifications
4.1 General
4.2 Actuator
4.3 Electrical characteristics
5. Reliability Assurance
5.1 Reliability Test Standard
5.2 Reliability Specification
6.
7.
Dimension
Optical Structure
8. Pin Connection
9. APC Power Supply
10. Standard evaluation circuit
11. Precautions for handling
12. Conformity of main parts to UL safety standards
13. Semiconductor Laser
Page 2 -
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 3 -
18
1. Scope of Document
This document describes the specification of optical pickup for use in compact disc players
(including audio CD and Video CD).
The contents of this specifications manual are subject to change for the purpose of
improvement by prior discussion of both parties.
If any disagreement should arise, action will be taken to settle the matter upon discussion of
both parties based on the content of specifications manual.
Within the range of these specifications, parts are subject to change without notice for technical
improvement.
2. Evaluation Conditions
Measurements of basic performance specifications must be performed under the following
conditions.
ITEM
Position
CONDITIONS
Emitting laser light from the horizontally placed objective lens is
to by Z axis + direction
Environment
The test should be taken at normal temperature and humidity. If
any doubts arise, take the test at a temperature
and humidity of 50
Test Equipment
5%
PULSTECH made standard inspection equipment.
Model: OPAS 1000A
Jitter Meter: Meguro MJM-6318
Leader LJM-1851
APC power supply (See chapter 9)
Standard measurement circuit (See chapter 10)
Oscilloscope(100MHz)
Evaluation disc
of 20 ~ 25
SONY: YEDS-18
A-BEX: TCD784
Note: This document adopts SI unit.
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 4 -
3. Absolute Maximum Rating
ITEM
SPECIFICATIONS
REMARKS
Actuator coil
Focusing coil
200mA RMS (continuous)
0mA for tracking coil
current
Tracking coil
200mA RMS (continuous)
0mA for focus ing coil
Laser diode reverse voltage
2V
Monitor
diode
30 V
diode
10 mA
pin
photo
reverse voltage
6-segment
photo
forward current
Focusing
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 5 -
4.Performance Specifications
4.1
General
ITEM
Movement
Electrical
Mechanical
Direction of Lens
optical
Lens
Laser diode
SPECIFICATION
Focus length (f)
3.86 mm
Numerical aperture (NA)
0.45
Working distance (WD)
2.1 mm
Laser wavelength (λ)
760~800 nm
Servo error detect Focusing error
Astigmatism method
method
3-spot method
Tracking error
Focusing Direction
A positive voltage applied to Pin 13 of Actuator/Laser diode
connector moves the objective lens toward disc.
A positive voltage applied to pin 14 of Actuator/Laser diode
Tracking Direction connector moves the objective lens toward the center of the
disc.
Dimension
See chapter 6
Mass Weight
23±1 g
Moving mass of actuator
1.8g
Power supply voltage for LD
PD signal output method
Single power supply
+5V
Voltage output
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 6 -
4.2 Actuator
STANDARD
VALUE
ITEM
(ROOM
REMARKS
FOCUSING
TEMPERATURE)
Movable distance
> ±0.7 mm
DC resistance
7.0±1
Sensitivity
+1.0
1.6 –0.6
mm/V
Resonant frequency 20±4 Hz
Specified at 5 Hz
Specified at Maximum Q value
(fo)
Q value
Phase
TR AC K IN G
With respect to design center position
15±5 dB
1 KHz
195±7 deg
5 KHz
224±7 deg
Movable distance
> ±0.5 mm
DC resistance
7.0±1
Sensitivity
+0.8
1.0 –0.4
mm/V
Resonant frequency 18±4 Hz
Q value=Gain(fo)-Gain(5Hz)
With respect to design center position
Specified at 5 Hz
Specified at Maximum Q value
(fo)
Q value
Phase
20±5 dB
1 KHz
182±7 deg
5 KHz
192±7 deg
Q value=Gain(fo)-Gain(5Hz)
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
4.3
Page 7 -
Electrical characteristics
RF Signal
ITEM
Level
STANDARD
(ROOM
TEMPERATURE)
1.0±0.2 Vp-p
Jitter Level
<30ns
REMARKS
APC temperature
characteristics exclude
Use a standard jitter measuring
device
Crosstalk
V2
| | <45%
V1
Focus Error Signal
Variation of RF The variation of RF signal envelope must be less than 30% when
signal
the objective lens moves±0.35mm
envelope
S-curve
20±6 Vp-p
S-curve p-p:10.5µm
Amplitude
Focus bias at
Optimum jitter level
Defocusing
<±1µm
defocus=|v2|/|v1|*10.5µm
Polarity
The focus error signal changes from minus to plus when the
objective lens approaches the disc.
14±6 Vp-p
Tracking Error Signal
Amplitude
E-F balance
E-F
different
Polarity
V2
| |<20%
V1
phase <60 deg
When the laser spot is off track toward the center of the disc,
tracking signal is defined as plus. (See Fig 4.3)
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
Fig 4.3
Page 8 -
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 9 -
18
5. Reliability Assurance
5.1 Reliability Test Standard
ITEM
CONDITION
TEST METHOD
Operating
-5 to 55 °C
Leave the pick-up in the idle state within this
Temperature
temperature range for 4 hours. Then age it for
10 minutes at the same temperature and take
performance data.
Do not allow condensation to form on the lens
and actuator.
Storage
-30 to 60 °C
Leave the pickup at temperature in the above
Temperature
range for 24 hours and then at room
temperature
for
over
16
hours.
Take
performance after aging.
Do not let condensation form on the lens and
actuator.
Storage in Hot and Temperature: 60 °C
Leave the pickup at the above temperature and
Humid Conditions
humidity for 48 hours and then at room
Humidity: 90%
temperature for over 16 hours. After aging, take
the performance data.
Do not let condensation form on the lens and
actuator.
Vibration
Amplitude:
2mm Subject the pickup to vibrations under the
Frequency:
13-25Hz above conditions for 20 minutes in each
Sweep: linear
direction (time for return sweep: 1 minute).
Directions:4
Then take the performance data.
(vertical and
horizontal)
Impact
80G
three directions
Use impact test machine
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 10 -
5.2 Reliability Specifications
(Deviations from initial value after reliability tests under the conditions specified)
Actuator
Focusing
ITEM
Sensitivity
Resonant frequency (fo)
Q value
Phase
Tracking
Sensitivity
STANDARD VALUE
1 KHz
5 KHz
< ±20 %
< ±2 Hz
< ±3 dB
< ±5 deg
< ±7 deg
< ±20 %
< ±2 Hz
< ±3 dB
1 KHz
< ±5 deg
Phase
5 KHz
< ±7 deg
RF signal
RF level
< ±15%
Jitter level
< 5 ns
Crosstalk
< |15|%
Focusing
S-curve amplitude
< ±20 %
error signal
Defocusing
< ±1 µm
Tracking
Traverse
< ±30 %
error signal
E-F balance
< |10| %
E-F phase difference
< 30 deg
Service Life of After 3,000 hours operation at 25 °C, defective rate is under 0.1%
Laser Diode
(excluding damage due to electrostatic discharge)
Optics
Resonant frequency (fo)
Q value
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 11 -
6. Dimension
+0.02
0
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 12 -
7. Optical Structure
COMPACT DISC
OBJECTIVE LENS
BEAM SPLITTER
GRATING
LASER DIODE
PHOTO DIODE
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 13 -
8. Pin connection
Pin No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
PDIC Vc
Vcc
E
D
A
B
C
F
GND
LD LD
VR
PD
F+
T+
TF-
2
1
3
OPC-C13
984375
3
1
2
4
5
6
7
8
9
10
11
12
5
4
7
6
13
9
13
11
8
10
14
15
12
V
V
G
VR
Short
Pads
Tracking
c
Focusing
E
D
A
B
C
F
c
PD IC
LD
16
15
14
16
18
(
+
c
D
(
N
5
V
)
=
V
Smartech Electronics and Machinery Manufacturing Co.,LTD
9. APC Power Supply (Reference)
Single +5V
Page 14 -
18
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 15 -
18
10. Standard evaluation circuit
-12V 22K 10K 22K
+12V
1P
1M
22K
(A)
51
10K
A
Vc
150K
10K
10K
IC1
10K
IC8
150K
IC7
FE
10K
22K
(B)
150P
10K
100K
-12V
150K
+12V
4.7K x 4
B
As above
IC2
200
33P x 2
1.1K
33P
(C)
C
As above
IC3
+12V
470
200P
8.2K 33P
20K
0.1u
2K
2.7K
100K
IC5
(D)
51
0.1u
D
As above
IC4
IC7
470
A+B+C+D
2SA706
RF
33P x 2
200
51
-12V
940K
e
100K
100K
10K
Vc 100K
940K
f 100K
IC6
940K
100K
220P
940K
IC6
51
TE
IC6
220P
10K
Vc 100K
100K
E
75K
IC6
100K
220P
50K
F
IC1~4: LM6361
IC5: LF357
IC6~8:TL084
Vc = Vcc/2
Vcc:Pickup Supply Voltage(+5v)
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 16 -
18
11. Precautions for handling
Following attentions should be paid when handling the pickup.Make sure the service person and
users are aware of them too.
11.1 Precautions for general handling.
OPC-C10A is comprised of precision mechanical and optical components and carefully
assembled and adjusted in factory, so that do not attempt to disassemble or readjust it.
Do not drop the pickup, avoid shock, rough handling or leaving the pickup in the environment
with high temperature / high humidity or dusty place.
11.2 Precautions for handling the laser diode
1) Do not attempt to adjust the trimmer.
Radiant power output and other characteristics of the laser diode are critically subject to the
ambient temperature. Output of laser diode is stabilized by pre-adjusting the trimmer on
circuit board of pickup in factory, and the external APC power supply circuit. An excessive
output of laser will deteriorate the life of laser diode.
2) Avoid current surges and electrostatic discharges
Due to the structure and operating principles of laser diode, LD may deteriorate on current
surges caused by switch and high speed pulse cause by electrostatic discharge.
Protective circuit should be provided to prevent damages by current surges.
Ground human body by a wrist strap, measuring equipment, jigs, and tools. Use of a
grounding mat on the worktable and floor is recommended
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 17 -
18
LD terminals are factory-strapped before shipment to protect LD from electrostatic
discharges during transportation. After connector insertion, unstrap the LD terminal with a
solder iron. The temperature of the solder iron must be under 320 and the unstrapping
should be performed quickly.
11.3 Handling actuator
1) The characteristic of the actuator may be changed if a magnetic object is located nearby.
Since the actuator use powerful magnet, do not allow foreign materials to enter through
gap in the cover.
2) When the lens has dust, dirt, fingerprint or oil on it, the characteristics of pickup such as
jitter, RF level may be degraded. Clean the lens with a lint free cotton bar moistened with
isopropyl alcohol.
Smartech Electronics and Machinery Manufacturing Co.,LTD
Page 18 -
12. Conformity of main parts to UL saftety standards
Part Name
Optical Base
Actuator
Cover
PD Base
Slide Rack
Flexible PCB
Material Manufacturer
Grade
94V-0
Genteric
Name
PPS
Type
No.
6165A
UL file
No.
E109088
Polyplastics Co., Ltd
Tokyo, Japan
Daicel Chemical Industries
Ltd.
Japan
Polyplastics Co., Ltd
Tokyo, Japan
Polyplastics Co., Ltd
Tokyo, Japan
Torita Group Co., Inc.
Zhuhai,Guangdong, PR.China
94V-0
POM
SER-90
E47773
94V-0
PPS
6165A
E109088
94V-0
POM
94HB
M90-44
94V-0
FPCB
TFC-1
E162630
13. Semiconductor Laser
Part Name
Semiconductor Laser
Material Manufacturer
Rohm Corporation
Product Name
RLD-78MA
18
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising