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PDF CX-3283 Data sheet ( Hoja de datos )
| Número de pieza | CX-3283 | |
| Descripción | DVD MECHANISM MODULE Manual | |
| Fabricantes | Pioneer | |
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CX-3283
CX-3283DVD MECHANISM MODULE (LS2)
CORRTD4ER84NO3.
- This service manual describes the operation of the DVD mechanism module incorporated in models
listed in the table below.
- When performing repairs use this manual together with the specific manual for model under repair.
Model
AVH-2400BT/XUEW5, AVH-2400BT/XUUW5, AVH-1400DVD/XUEW5
AVH-1400DVD/XUUW5
AVH-P1400DVD/XUUC, AVH-1450DVD/XMRC, AVH-1450DVD/XURD
AVH-1450DVD/XMRI, AVH-1490DVD/XMID
AVH-P3400BH/XUUC, AVH-P2400BT/XUUC, AVH-2450BT/XMRC
AVH-2450BT/XURD, AVH-2450BT/XMRI, AVH-2490BT/XMID
AVH-3400DVD/XUEW5, AVH-P3400DVD/XUUW5, AVH-P3450DVD/XURC
AVH-P3450DVD/XURD, AVH-P3450DVD/XURI, AVH-P3490DVD/XUID,
AVH-P3450DVD/XMRC, AVH-P3450DVD/XMRI, AVH-P3490DVD/XMID
AVH-P4400BH/XUUC, AVH-4400BT/XUEW5, AVH-P4450BT/XURC
AVH-P4450BT/XURD, AVH-P4450BT/XURI, AVH-P4490BT/XUID
DVH-340UB/XMEW5, DVH-340UB/XMUW5, DVH-345UB/XMRC
DVH-345UB/XMRD, DVH-345UB/XMRI, DVH-3490UB/XMID
Service manual
CRT4836
CRT4837
CRT4838
CRT4839
CRT4840
CRT4842
DVD Mechanism Module
CXK8003
CXK8003
CXK8003
CXK8002
CXK8002
CXK8001
CONTENTS
1. CIRCUIT DESCRIPTION.......................................................................................................................................................2
2. MECHANISM DESCRIPTION .............................................................................................................................................15
3. DISASSEMBLY....................................................................................................................................................................21
PIONEER CORPORATION 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, Japan
PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
PIONEER CORPORATION 2011
K-ZZZ DEC. 2011 Printed in Japan
http://www.Datasheet4U.com
1 page  
5 67
1.2 SERVO BLOCK (MN2DS0018MA : IC1501)
8
The servo block performs servo control, spindle motor control and seek control for focus, tracking, and traverse.
1.2.1 Focus Close
FODRV
Close to Disc
Lens
Away from Disc
VHALF
Focusing Point
FE
A
B
RFENV
C
AS
For both DVD and CD, the processing sequence after issuing a focus close command will be:
1. Measurement and optimization of a signal level
Drive the PU lens in the direction to get away from the disc first, and then drive it in the direction to get closer to the disc.
During the process, measure the signal levels of FE, AS, and RFENV when it passes the focusing point.
Optimize the signal levels for FE and AS (See 1 and 2 in the figure).
2. Focus pulling-in
Next, drive the lens in the direction to get away from the disc and detect pulling-in level of FE and AS.
Then, activate the Focus Loop Filter to pull in the focus ( 3 - 6 ).
3. Pulling-in check
Check the focusing with the signal levels of AS and RFENV ( 6 and 7 ).
Using a test mode focus search, you can check the signal levels of FE, AS, and RFENV as well as focus driving voltage.
D
1.2.2 Tracking Close
For both DVD and CD, the processing sequence after issuing a tracking close command will be:
1. Tracking brake
Measuring a 1/2 cycle of track cross, output a brake pulse if the cycle is within the specified range. In which direction
the brake pulse should be output is determined from the phase relation between OFTR and TKC signals (binarized
signal of TE). Once it is confirmed that the swinging of the lens against the disc has been successfully controlled,
stop braking and start pulling in. If the pulling-in conditions are not fulfilled within 10 msec after brake is output, stop
braking and start pulling in.
2. Tracking pulling-in
Process the tracking drive hold with an OFTR signal.
3. Pulling-in check
Check that track jump is less than the specified number within the specified period. The pulling-in check will time out in
8.4 msec and be retried upon receiving a command from the microprocessor.
E
F
CX-3283
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5
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http://www.Datasheet4U.com
5 Page 
567 8
1.7 CLOCK CIRCUIT
[Outline]
By connecting a 27 MHz crystal oscillator with DVD-LSI (IC1501), it generates and supplies DACCLK for
externally connected Audio-DAC in addition to the clock to be used in the LSI with the clock generator in DVD-LSI.
IC1501
DVD-LSI
MN2DS0018MA
156pin
OSCO
155pin
OSCI
R1503
1 Mohm
X1501
CSS1823
27 MHz
R1508
220 ohm
IC1801
Audio-DAC
PCM1753DBQ
DACCLK
33.868 8 MHz or 36.864 MHz
A
B
[Outline of USB_Clock]
By connecting a 48 MHz crystal oscillator with DVD-LSI (IC1501), it generates and supplies the clock to be used
in the USB circuit with the clock generator in DVD-LSI (USB interface section).
IC1501
DVD-LSI
MN2DS0018MA
50pin
USB_Clock
IC1951
TC7SZU04 FU
4pin(OUT_Y)
2pin(IN_A)
R1952
1 Mohm
X1950
CSS1760
48 MHz
C
D
E
F
CX-3283
11
5
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