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Service Manual
DVD MECHANISM MODULE(MS3)
ORDER NO.
CRT3056
CX-3016
- This service manual describes the operation of the DVD mechanism modules incorporated in the models listed below. - When performing repairs use this manual together with the specific manual for the model under repair. - The DVD mechanism MS3 has VIDEO-type and ROM-type models. This manual covers the operations for both models.
Model AVH-P6500DVD/UC DVH-P5000MP/UC AVH-P7500DVD/UC Service Manual CRT3038 CRT3074 CRT3039 DVD Mechanism Module CXK6310 CXK6312 CXK6300
CONTENTS
1. CIRCUIT DESCRIPTIONS ...........................................2 2. MECHANISM DESCRIPTIONS.................................15 3. DISASSEMBLY .........................................................20
PIONEER CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS SERVICE 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 C PIONEER CORPORATION 2003
K-ZZU. APR. 2003 Printed in Japan
1
2
3
4
A
1.Circuit descriptions
1.1 Front-end processor (FEP) section (AN8703FH: IC1101)
The IC1101 generates servo signals for focus and tracking operations, processes the RF signal, and controls the laser power of the pickup. For servo signal processing, the IC contains a focus operational amplifier, a focus balance adjustment circuit, a threebeam tracking operational amplifier, a phase-difference tracking detection circuit, a tracking balance adjustment circuit, and an envelope detection circuit. For the RF signal processing, the AGC and equalizer functions are contained in the IC.
B
+5V
3.9 3.9 3.9 3.9
CN1101
For CD 170mV + LPC02 4 24 78LD + CDLD1
CDLD0
C
3 LPC2 +5V + 180mV + LPC01 2 26 65LD + DVDLD1 CD LD DVD LD 3.9 3.9 3.9 3.9 +5V MD 5 78MD
For DVD
D
1 LPC1
DVDLD0 7
65MD
AN8703FH
PU UNIT
1.1.1 APC circuit
E
The light output of laser diodes (LD) has largely negative thermal characteristics. If they are driven with a constant current, the laser power level will not be constant. The APC circuit is designed to control the current so that the laser power becomes constant through the monitor diode (MD). The IC AN8703FH contains two APC circuits, one for DVDs and the other for CDs. The LD current values for DVDs can be calculated by dividing the voltage between the DVDLD1 (or CDLD1 for CDs) and 5V line by 15.6 ohms (3.9 ohms x 4): approximately 26mA and 44mA for DVDs and CDs respectively.
F
2 1 2
CX-3016
3
4
5
6
7
8
1.1.2 Focus error (FE) generating circuit
A
CN1101 16 57 VIN1 (49 VIN5) G4 58 VIN2 (50 VIN6) G4 59 VIN3 (51 VIN7) 60 VIN4 (52 VIN8) 1f 1+f + + 22 FEOUT 21 FEN FEY FEX FE 117 AD0
B1
B2
15
B
VHALF
B3
13
VHALF 1.65V Control
B4
11
MNZS26EDCUB AN8702 FH 7 FBAL
The pin numbers and names in the brackets are for CDs. The circuits for CDs and DVDs are identical, except for the input terminals of the signals B1 through B4. C
Focus error (FE) generating circuit
The signals B1 through B4, obtained by dividing the output in the pickup, are applied to the FE generating circuit. Inside the circuit, the (B1 + B3) and (B2 + B4) signals are generated via the internal resistors, fed into the variable amplifier for the focus balance adjustment, and finally the FE signal is generated by amplifying the {(B1 + B3) (B2 + B4)} signal.
D
E
F
CX-3016
3 7 8
5
6
1
2
3
4
A
1.1.3 Tracking error (TE) generating circuit
· CD (three-beam TE) CN1101 63 10 VIN12 C 62 VIN11 A 17
TBAL TEOUT 18 TEY 17 6 TBAL TEN VHALF MNZS26EDCUB TEX TE 118 ADI
+ B
AN8703FH
· DVD (phase difference TE)
C
16 VIN1 15 B2 VIN2 B3 13 VIN3 B4 11 VIN4 B1
57 58 59 60
EQ
EQ
TBAL
EQ
Differential Phase Det.
+ -
18
TEOUT VHALF 118 ADI TEN TEY TEX TE MNZS26EDCUB
17
EQ
AN8703FH
6 TBAL
D
Tracking error (TE) generating circuit
For DVDs, the TE signal is generated by utilizing the phase difference between the (B2 + B4) and (B1 + B3) signals (the phase difference method). For CDs, the A and C signals are applied to the TE generating circuit via the external resistors. Inside the circuit the signals are fed to the variable amplifier for the tracking balance adjustment, and finally the TE signal is obtained by amplifying the (A C) signal (the three-beam method).
E
F
4 1 2
CX-3016
3
4
5
6
7
8
1.2 Optical disc controller (SODC) section (MNZS26EDCUB: IC1301)
The IC1301, an optical disc controller (SODC) for DVD-ROM/DVD players, is one of a signal processing LSI conforming to the DVD standards. This IC works as a servo controller for the focus, tracking and traverse operations, a spindle motor controller, a seek controller, a digital signal processor for DVD-ROM/RAM reproduction (8/6 demodulation and error correction), and a digital signal processor for CD-ROMs (error correction). In the DSC (Disc Servo Controller) employing an arithmetic processor as a core, analog circuits such as A/D and D/A converters and PLL, and digital circuits including a PWM converter and a cycle timer are contained. In the CIRC, a digital signal processor for CD-DA and CD-ROMs (EFM demodulation and error correction), a spindle motor digital servo processor, and a 1-bit D/A converter with a digital filter (with a secondary low-pass filter, differential OP amplifier output) are prepared. This LSI has easily realized a complete CD/DVD-ROM system.
A
B
1.2.1 Focus close
FODRV VHALF
C
Away from the disk
Lens Near the disk
Focal point
1 FE 4
5
D
RFENV
7
6 2 AS 3
E
After a focus close command is issued, the following procedures are performed irrespective of DVDs and CDs: 1. Measuring and optimizing the signal levels The pickup lens initially moves away from the disc, and then toward the disc. When the pickup lens passes the focal point, the FE, AS and RFENV signal levels are measured to optimize the FE and AS signal levels (1 and 2 shown in the above diagram).
F
CX-3016
5 7 8
5
6
1
2
3
4
A
2. Focus closing Next, the pickup lens moves away from the disc to detect the focus closing levels for FE and AS signals. The focus loop filter operates to close the focus loop (3 through 6 in the above diagram). 3. Verifying focus close completion The focus close completion is verified by observing the AS and RFENV signal levels (6 and 7 in the above diagram). In the test mode, focus search is used to verify the FE, AS and RFENV signal levels and the focus drive voltage.
1.2.2 Tracking close
After a tracking-close command is issued, the following procedures are performed irrespective of DVDs and CDs: 1. Tracking brake A half cycle of the track-cross (TKC) signal is measured. If the measured cycle falls within the prescribed range, then a brake pulse signal is output. The direction of the brake pulse depends on the relation in phase between the OFTR signal and TKC signal (which is obtained by converting the TE signal into a binary signal). When it is confirmed that the stability in lens operation against the disc has been obtained, the brake pulse output will be terminated, and the operation will proceed to the track-closing mode. If it is not confirmed, the brake pulse output will be terminated 10msec. after the brake pulse signal is output, then the operation will automatically proceed to the track-closing mode. 2. Tracking closing The tracking drive-hold process is performed with the OFTR signal. 3. Verifying tracking close completion The success or failure in tracking close depends on the number of tracks that the pickup crosses within the prescribed period. That is, when the number is the prescribed one or less, the system senses that the tracking close is completed. The time limit for the tracking close verification process is 20msec. The retry operation will be carried out with the command from the microcomputer if the verification has not been completed within the time limit.
B
C
1.2.3 Track jump
This system performs track jumps by selecting the following three modes depending on the number of tracks to be skipped: Interval jump, multi jump and traverse jump. 1. Interval jump In this mode, a single-track jump is performed repeatedly. This mode is used for fine seek operation when the pickup has approached the target track or adjacent tracks are targeted. 2. Multi jump This mode performs the pickup track-count movement by counting both edges of the TKC signal to jump the target number of tracks. 3. Traverse seek In this mode, the time is measured with the TKC signal to control the pickup speed. During the movement of the pickup, its vibration is minimized.
D
E
The track-jump mode settings for DVDs and CDs are shown below: Target number of tracks 1~10 11~100 101~500 501~
F
Track jump mode Interval jump Multi jump Combination of multi jump and interval jump Traverse seek
The waveform in each of the track-jump modes is shown in the following pages.
6 1 2
CX-3016
3
4
5
6
7
8
Trackingon process
A
B
C
D
Interval jump (one track) Toward outer tracks Toward inner tracks
E
TE
TD
F
CX-3016
7 7 8
5
6
1
2
3
4
A
Multi jump (32 tracks) Toward outer tracks Toward inner tracks
TE
B
TD
Traverse seek (501 tracks) Toward outer tracks
C
Toward inner tracks
TE
TD
COħ
D
Traverse seek (5,000 tracks) Toward outer tracks Toward inner tracks
TE
E
TD
COħ
F
8 1 2
CX-3016
3
4
5
6
7
8
1.2.4 Focus jump
Focus jump is used for single-sided, double-layered or double-sided, double-layered discs. The layer closest to the objective lens is called layer 0 (L0), and the other layer is layer 1 (L1).
A
L0 (Layer 1) L1 L1
L1 B C
L1
L0
(Layer 0)
L0 Objective lens
L0 A D
B
The waveforms in the focus jump mode are shown below:
Focus jump waveform L0L1 L1L0
C
TE
FD
D
The focus-jump operation flow is described below: 1. The tracking loop is unlocked on the layer that is being played. 2. A jump command is issued to jump to the targeted layer. 3. The tracking loop closes on the targeted layer and reproduction starts. The detailed processes after a jump command is issued are as follows: 1. The pickup lens is accelerated towards the target layer until the FE signal detects the focus jump acceleration completion level. If the acceleration timeout occurs before the acceleration completion level is detected, the acceleration is forcibly terminated. 2. No drive voltage is applied until the FE signal detects the deceleration starting level, and the lens is kept moving by the inertia. 3. With the deceleration starting level detected, the lens starts decelerating, and continues it until the deceleration completion level is detected. If the deceleration timeout occurs before the deceleration completion level is detected, the deceleration is forcibly terminated.
E
F
CX-3016
9 7 8
5
6
1
2
3
4
A
1.3 Automatic adjustment functions
This system automatically performs all circuit adjustments by combined operations of the ICs AN8703FH (FEP) and MNZS26EDCUB (SODC). Each automatic adjustment function is explained below: 1.3.1 FE, TE and AS offset cancel The analog signals FE, TE and AS, generated by the FEP, are A/D-converted by the A/D converter inside the SODC. When the power is turned on, the offset cancel works to cancel the input offset of the A/D converter. 1.3.2 Data slice balance (DBAL) adjustment The DBAL adjustment is made to adjust the data-slice level that is used when the RF signal from the FEP is converted to a binary signal in the SODC. When the power is turned on, the test signal of the constant frequency is output from the SODC and the jitter component of the signal is adjusted to the minimum. ·In the same manner as the above, the PLL balance (PBAL) adjustment is made to optimize the current level balance between the P-ch and N-ch sides of the chargeable pump. 1.3.3 FE regulating adjustment The FE signal level measured when the focus loop is closed is A/D-converted in the SODC. Then it is adjusted so that it becomes 190LSB at the input stage of the digital equalizer. 1.3.4 Spindle gain learning The time is measured that is required for the spindle motor to start rotating in the stop mode and reach the prescribed rotation. The measured time is used to adjust the SPDL gain, thereby absorbing the variation in the motor torque.
B
C
1.3.5 Tracking balance (TBAL) adjustment In the focus close and tracking open mode, the lens is vibrated in the tracking direction. The tracking balance is adjusted so that the DC offset becomes zero (the balance point) by using the Newton-Raphson's method. 1.3.6 Tracking error amplitude learning In the focus close and tracking open mode, the lens is vibrated in the tracking direction. After A/D-converted in the ADSC, the amplitude level of the TE signal is adjusted so that it becomes 190LSB at the input stage of the digital equalizer. 1.3.7 Focus balance (FBAL) adjustment In the tracking close mode, the focusing position is adjusted by minimizing the RFENV. 1.3.8 Focus gain and tracking gain adjustments In the tracking close mode, some disturbance signal is applied to the servo loops. The focus and tracking gains are adjusted to the target gain cross points. 1.3.9 AS regulating adjustment In the tracking close mode, the AS signal level is sampled the prescribed times. After A/D-converted in the ADSC, this signal is adjusted so that it becomes 64LSB at the input stage of the digital equalizer.
D
E
F
10 1 2
CX-3016
3
4
5
6
7
8
For each automatic adjustment, the adjustment results can be displayed in the test mode for verification.
A
Condition Power-on
Coefficient name FE offset TE offset AS offset
DVD FC44 - 03BC EF90 - 1070 FBBB - 0745 01CF - 048D 1767 - 462B B9D5 - E899 1006 - 2AD5 014E - 044E 199E - 4776 B88A - E662 00F7 - 03AE 0100 - 0400 0100 - 0400 0170 - 04BF
CD FABB - 0545 F435 - 0BCB F8BB - 0745 01CF - 048D 15C2 - 485A B7A6 - EA3E 0E96 - 26FD 0142 - 04AB 147C - 43D6 BC2A - EB84 00EF - 0428 0100 - 0400 0100 - 0400 0192 - 05D0
C B
Focus close
Spindle gain FE maximum FE minimum AS maximum FE regulation
Focus close (after TBAL)
TE maximum TE minimum TE regulation
Tracking close
Focus gain Tracking gain AS regulation
Notes: The coefficient values are indicated in the hexadecimal system. The specifications shown above are for the production line. The used discs are DVD-REF-A1 and TCD-782 for DVDs and CDs respectively.
D
E
F
CX-3016
11 7 8
5
6
1
2
3
4
A
1.4 Back-end section
As described before, in the front-end processor and optical disc controller, the data is read out from a disc, and processed for demodulation and error correction. Here in the back-end section, thorough the MPEG decoding, compressed audio decoding and other processing, the data is output as video and audio signals. The back-end section, including the microcomputer, its peripheral circuits, and power supply, is explained below:
B
1.4.1 Back-end power supply
The back-end power supply for each model is shown below. The video-type model with DVD-Audio reproduction function has the 2.5V internal regulator, but the video-type model without DVD-Audio reproduction function does not. The ROM-type has a different power supply circuit from those for the video-type models. X-3016(Video model) The model with DVD-Audio playback VD8V F.E.drivers X-3016(Video model) The model without DVD-Audio playback VD8V F.E.drivers X-3055(ROM model) F.E.driver
C
VD8V
VDD33
D
IC1701 CPU power supply IC1702 SRAM power supply F.E. IC1101 P.U peripheral IC1605 DAC Q1501 peripheral IC1503 AV CHIP etc. IC1503 AV CHIP IC1804 VCC25 2.5V regulator
VDD33
IC1701 CPU power supply IC1702 SRAM power supply F.E. IC1101 P.U peripheral IC1605 DAC Q1501 peripheral IC1503 AV CHIP etc. IC1503 AV CHIP
VCC5
F.E. IC1101 P.U peripheral IC601 3.3V regurator IC602 1.8V regurator VCC33
SRVDD33
SRVDD33
VCC5
VCC5
VCC18
AVCC5
E
AVCC5
VCC33
VCC33
VCC18
VCC18
VCC33
F
(=2.5V)
Power supply configuration
12 1 2
CX-3016
3
4
5
6
7
8
1.4.2 Back-end clock section
For the Video-type models: An oscillating crystal of 27MHz is used to generate the 27MHz buffer-out (CLK27), audio section clock (EXTCK), and front-end section clock (MCK16) signals by the IC1507. For the ROM-type model: An oscillating crystal of 16.93MHz is used to generate the front-end section clock (MCK16) signal by the IC1301. IC1507 Clock generator 27MHz Crystal CLK27 EXTCK MCK16 *MCK33 VCC33 IC1503 AVLSI IC1605 AUDIO DAC IC1301 SODC *IC1601 AWM IC1301 79 OSCI1 MNZS26EDCUB 16.93MHz Crystal 80 OSCO1
A
B
*MCK33:The model with DVD-Audio playback Clock configuration
1.4.3 Back-end stream I/F section (only for the video-type models)
This section functions as an interface to transfer the data read out in the front-end section, between the SODC and the back-end section. For DVDs, this section transfers MPEG data, which is generally called MPEG stream. Therefore, the I/F section is called stream I/F. Note that the signals are given different names between the IC1301 SODC and IC1503 AVLSI. IC1503 AVLSI
C
IC1301 SODC
OHDD8-15 IC1405 ODA2 O/INTRO MASTER
STD0-7
STCLK STVALID STENABL
D
Streaming I/F
1.4.4 Back-end audio circuit section (only for the video-type models)
The three serial audio signals, output from the AVLSI, are applied to the IC1605 (Audio DAC), where they are converted into analog audio signals. These analog signals are output from the HOST I/F. Only for the models installed in navigation products, after output from the AVLSI, the same serial signals are directly put out from the HOST I/F. The IEC958 (audio/digital out) is available only for the model without DVD-Audio playback function.
AVCC5 IC1503 AVLSI IC1605 Audio DAC
CN1611
E
HOST I/F SRCKAV ADOUT0 LRCKAV LO RO
AAGND
Only the models installed in navigation products
CN1501
IEC 958 The model without DVD-Audio playback
F
Audio circuit
CX-3016
13 7 8
5
6
1
2
3
4
A
1.4.5 Back-end video circuit section (only for the video-type models)
The composite video signal from the video DAC circuit inside the AVLSI is output from the HOST I/F via the video buffer circuit.
IC1503 AVLSI Video DAC section COMP
AVCC5 Q1501 peripheral Video buffer circuit
CN1611 HOST I/F
B
COMPO
Video circuit
1.4.6 Back-end SDRAM I/F section (only for the video-type models)
For the SDRAM, which functions as the communication I/F between the AVLSI and the memory, a 64Mbit IC has employed to secure the MPEG stream dada buffer.
C
IC 1501 SDRAM
MA0-11 MDQ0-15 MCK XWE XCAS XRAS XCSM(XCSE) DQMUM(DQMUE) DQMLM SDRAM interface
IC1503 AVLSI
D
1.4.7 Back-end microcomputer I/F section (only for the video-type models)
This section works as a communication interface between the AVLSI and the CPU. In order to match the operating frequency for the CPU with that for the AVLSI, a frequency dividing circuit is inserted as shown below.
E
IC1701 CPU
A1-A17 DO-D15 XCSAVR XCSAVW XAVINT XRD CLKOUT XSRAMWR IC1706 XCSAV
IC1503 AVLSI
IC1502 IC1504 IC1505 Dividing circuit
HCLK XHWR
F
Microcomputer interface
14 1 2
CX-3016
3
4
5
6
7
8
2. Mechanism descriptions
A
Configuration
CRG motor
PU unit
B
C
Spindle motor
Load motor
D
E
SW5 (CLAMP SW) 8/12 detection lever R
SW4 8/12 detection lever L
SW2 SW1 SW6
SW3
F
CX-3016
15 7 8
5
6
1
2
3
4
A
2.1 Disc loading operation
1. When a disc is inserted, the 8/12-detection levers R and L slide. Either of the switches SW1 and SW2 is shifted from ON to OFF, which triggers the operation of the loading motor. 2. For a 12cm disc, the switch SW3 is turned OFF and SW4 is ON during disc transportation. The microcomputer senses that a 12cm disc is loaded.
B
C
12 cm disk
3. For an 8cm disc, neither the switch SW3 nor SW4 will be shifted to the above states (SW3: OFF, SW4:ON) during disc transportation. The operation mode proceeds to the clamp operation. The microcomputer senses that an 8cm disc is loaded.
D
E
8 cm disk
F
16 1 2
CX-3016
3
4
5
6
7
8
2.2 Disc centering mechanism
1. With a 12cm disc loaded, the disc pushes both of the lock arms R and L to open the centering arms R and L. Then, the clamp arm or the stopper of the centering arm R stops the disc for centering. The operation mode proceeds to the clamp operation.
A
12 cm disk latching section
12 cm disk latching section
B
Clamp arm
Lock arm
Centering arm Centering arm
C
2. With an 8cm disc loaded, the disc pushes either of the lock arms R and L. The lock arms R and L are connected each other via the centering arms R and L. The lock arms R and L will be kept locked unless the disc pushes them at the same time. Therefore, the lock arm blocks the disc for centering. During disc centering, the disc pushes out the disc detection arm. When the detection arm completes moving, the disc stops. The operation mode proceeds to the clamp operation.
D
E
8 cm disk latching section
F
CX-3016
17 7 8
5
6
1
2
3
4
A
2.3 Clamp operation
1. When an 8 or 12 cm disc is centered over the spindle, the disc detection arm moves the clamp lever. The loading rack driven by the clamp lever is engaged with the lever driving gear, which triggers the disc clamp operation.
Disc positioning section
Disc detection arm
Clamp lever
B
Loading rack Load lever R
C
Clamp switch
D
E
F
18 1 2
CX-3016
3
4
5
6
7
8
2. When pressed by the loading rack, the load lever R moves toward the front side, and the roller shaft, which is connected to the cam of the load lever R, moves downward. The roller shaft is connected to the cam of the cam ring also. Therefore, the drive of the roller shaft is transferred to the load lever L via the cam ring. The load lever L moves toward the front side. The load lever cams are released from the three shafts for the CRG chassis unit and the clamp arm shaft. When the load lever R turns on the clamp switch, the clamp operation ends.
A
CRG chassis shaft linked with the cam
CRG chassis shaft linked with the cam
B
Clamp arm shaft linked with the cam CRG chassis shaft linked with the cam CRG chassis shaft linked with the cam
C
2.4 Eject operation
1. When the loading motor turns in reverse, the disc eject operation begins. 2. With a 12cm disc loaded, when the SW4 is shifted from OFF to ON, and then OFF again, the eject operation ends. 3. With an 8cm disc loaded, when the SW3 or SW 6 is shifted from ON to OFF, and then both switches are turned ON, the eject operation ends.
D
E
F
CX-3016
19 7 8
5
6
1
2
3
4
3. Disassembly
- Precautions on handling the mechanism module
A
1. Hold the upper and main frames. 2. Do not hold the front portion of the upper frame. It is a delicate part. 3. Do not touch the switches on the top panel. 4. Be careful not to catch the flexible cables.
B
C
Do not touch here. Do not touch here. Do not hold this delicate portion.
Fig. 1
- Removing the module pc board (fig.2 and 3)
1. Set the mechanism to the lock position (disc load standby position). 2. Place the mechanism module upside down. 3. Short the two lands on the pickup flexible cable as shown below. 4. Be sure to disconnect the pickup flexible cable and the CRG flexible cable from the connectors to protect them from damages. 5. Remove solder from the load motor leads and clamp SW leads. 6. Loosen the two fixing screws. Lift the position A of the module pc board lightly and move it in the direction B to remove it. Be careful not to damage the flexible cable C. 7. Disconnect the 8/12 detection flexible-cable from the connector.
D
Short here. Module pc board
E
Fig. 2 Fig. 2
Connector (for pickup flexible cable) Connector (for 8/12 detection flexible cable) Load motor leads and clamp SW leads
F
B
Connector (for CRG flexible cable)
A
C
Fig. 3
20 1 2
CX-3016
3
4
5
6
7
8
- Removing the pickup unit (fig. 4))
1. Remove the module pc board in accordance with the procedure of "Removing the module pc board." 2. While holding the pickup case, remove the skew screw (main). 3. Lifting the end of the pickup rack, slide the main shaft, and remove the pickup unit. Notes: Replacing the pickup unit requires the skew adjustment. Remove glue from both ends of the main and sub shafts, and skew stud. Do not reuse the old skew screw. Be sure to use a brand-new skew screw supplied with a new pickup unit. Fix the skew screw with glue (GYL1001) after adjustment.
A
B
Skew screw (main)
Skew screw Pickup unit Sub shaft
C
Skew screw
Fig. 4
D
E
F
CX-3016
21 7 8
5
6
1
2
3
4
- Removing the CRG motor ASSY (fig.5)
1. Remove the module pc board in accordance with the procedure of "Removing the module pc board." 2. Release the CRG motor leads from the resin guide and remove the CRG flexible cable from the land. 3. Remove the fixing screw, and remove the feed screw holder together with the 2-stage gear. 4. Remove the fixing two screws and CRG motor ASSY. Caution: When replacing the CRG motor ASSY, be careful not to damage the gears, especially the 2-stage gear that is very delicate. When lifting the pickup rack to install the motor, be careful not to damage the gear teeth.
A
- Removing the spindle motor (fig.5)
1. Remove the module pc board in accordance with the procedure of "Removing the module pc board." 2. Release the CRG motor leads from the resin guide and remove the CRG flexible cable from the land. 3. Remove the three fixing screws for the SPDL motor. Be careful not to deform the CRG chassis when replacing the SPDL motor. CRG motor ASSY Feed screw
B
Screw 2-stage gear Pickup rack Feed screw holder Screw
C
SPDL motor
Fig. 5
- Removing the upper frame ASSY (fig. 6)
1. Remove the module pc board in accordance with the procedure of "Removing the module pc board." 2. Remove the spring. 3. Remove the four screws and remove the upper frame ASSY.
D
Screw
Screw
E
Spring Upper frame ASSY Screw
F
Screw
Fig. 6
22 1 2
CX-3016
3
4
5
6
7
8
- Removing the load gear ASSY (fig. 7)
1. Remove the module pc board in accordance with the procedure of "Removing the module pc board." 2. Remove the upper frame ASSY in accordance with the procedure of "Removing the upper frame ASSY." 3. Remove the two screws and remove the load gear ASSY. 4. Remove the loading rack and the spring.
A
Screw
B
Load gear ASSY
C
Screw
Fig. 7 - Setting the quasi-clamp mode by driving the loading motor (fig. 8)
1. While driving the loading motor in the clamping direction, pull the clamp lever toward the front side. 2. Even after the clamp lever pushes the loading rack (clamp mode), keep the clamp lever pulled lightly. Prevent the clamp lever bar ring from coming into the clamp spring. If not, ejection will not be impossible. 3. After the clamp operation ends, stop the operation before the objection of the loading rack touches the load lever R. (fig. 10)
D
Pull toward the front side.
Clamp lever
E
Fig. 8
F
CX-3016
23 7 8
5
6
1
2
3
4
A
Clamp lever Clamp spring bar ring
B
Prevent the clamp lever bar ring from coming into the clamp spring (the above condition is NG)
Fig. 9
C
Stop before this clearance becomes zero. Load lever R Loading rack
D
E
F
Fig. 10
24 1 2
CX-3016
3
4
5
6
7
8
- Setting the quasi-clamp mode manually (fig. 11)
1. Remove the module pc board in accordance with the procedure of "Removing the module printed circuit board." 2. Remove the upper frame ASSY in accordance with the procedure of "Removing the upper frame ASSY." 3. Remove the load gear ASSY in accordance with the procedure of "Removing the load gear ASSY." 4. While pulling the clamp lever toward the front side, pull the fixed portion of the load lever R toward the front side until the mode enters the clamp position.
A
Clamp lever
B
Pull this portion of the load lever R forward.
Load lever R
C
Fig. 11
- Removing the load motor ASSY (fig. 12)
1. Remove the module pc board in accordance with the procedure of "Removing the module printed circuit board." 2. Remove the upper frame ASSY in accordance with the procedure of "Removing the upper frame ASSY." 3. Remove the load gear ASSY in accordance with the procedure of "Removing the load gear ASSY." 4. Enter the quasi-clamp mode in accordance with the procedure of "Setting the quasi-clamp mode manually." 5. Remove the screw. Slide the load motor ASSY to pull it out.
D
E
Screw
Slide to remove.
Fig. 12
F
CX-3016
25 7 8
5
6
1
2
3
4
A
- Removing the CRG ASSY (fig. 13)
1. Enter the quasi-clamp mode in accordance with the procedure of "Setting the quasi-clamp mode by driving the loading motor." 2. Remove the module pc board in accordance with the procedure of "Removing the module pc board." 3. Remove the upper frame ASSY in accordance with the procedure of "Removing the upper frame ASSY." 4. Remove the four springs. 5. Lift the CRG ASSY until the shafts come from the dampers, and then remove it.
- Removing the disc guide ASSY (fig. 13)
1. Enter the quasi-clamp mode in accordance with the procedure of "Setting the quasi-clamp mode by driving the loading motor." 2. Remove the module pc board in accordance with the procedure of "Removing the module pc board." 3. Remove the upper frame ASSY in accordance with the procedure of "Removing the upper frame ASSY." 4. Remove the two disc guide springs. While lifting the disc guide and keeping the lifting angle around 45 degrees, slide the guide in the left side to remove it.
B
C
Spring
CRG ASSY
Spring
Spring
D
Disc guide spring Disc guide spring
Disc guide
E
Fig. 13
F
26 1 2
CX-3016
3
4
5
6
7
8
- Removing the roller ASSY (fig. 14)
1. Remove the module pc board in accordance with the procedure of "Removing the module pc board." 2. Remove the upper frame ASSY in accordance with the procedure of "Removing the upper frame ASSY." 3. Remove the tension spring. 4. Remove the load gear ASSY in accordance with the procedure of "Removing the load gear ASSY." 5. Enter the quasi-clamp mode in accordance with the procedure of "Setting the quasi-clamp mode manually." 6. Remove the disc guide ASSY in accordance with the procedure of "Removing the disc guide ASSY." 7. Remove the CRG ASSY in accordance with the steps 4 and 5 in the procedure of "Removing the CRG ASSY." 8. By pushing the fixed portion of the load lever R, move the load lever R to the rear side completely. 9. Remove the load levers R and L. Unhook the end of the roller arm spring R from the load lever R. 10. While lifting the roller ASSY to the highest position, slide it to the right side. Lightly bend the whole slot guide by pushing the ends with your fingers and remove the roller ASSY.
A
B
C
Move to the rear side
Load lever R
Roller arm spring L
Roller arm spring R
D
Slot guide Roller ASSY
Push the ends to lightly bend the whole slot Tension spring
Fig. 14
E
F
CX-3016
27 7 8
5
6
1
2
3
4
A
- Removing the dampers (fig. 15)
1. Enter the quasi-clamp mode in accordance with the procedure of "Setting the quasi-clamp mode by driving the loading motor." 2. Remove the module pc board in accordance with the procedure of "Removing the module pc board." 3. Remove the upper frame ASSY in accordance with the procedure of "Removing the upper frame ASSY." 4. Remove the three springs. 5. Remove the CRG SSSY in accordance with the steps 4 and 5 in the procedure of "Removing the CRG assembly." 6. Release each of the three dampers from the clinches as follows: 6.1 By using a pair of pliers, hold the portion A and turn them in the direction B. While making a gap in the portion C, release the damper from the clinches. 6.2 Insert a flat-type screwdriver into the portion D. Slightly raise the plate and release the damper from the clinches. 7. Remove the CRG motor ASSY in accordance with the steps 2 through 4 in the procedure of "Removing the CRG motor ASSY." 8. Remove the dampers.
B
C
C
A
A
B
D
D
E
Fig. 15
F
28 1 2
CX-3016
3
4