Pioneer CX-3168 Service Manual
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Pioneer CX-3168 Service Manual

Pioneer CX-3168 Service Manual

Cd mechanism module
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CD MECHANISM MODULE(G3)
CX-3168
CX-3116
X-3168 : TOYOTA
X-3116 : FORD
- - - - This service manual describes the operation of the CD 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
AVIC-XD1057ZF/UC
AVIC-XD1557ZF/UC
AVIC-XD1957ZF/UC
DEH-MG2057ZF/XU/UC
DEX-MG8157ZT/UC
DEX-MG8057ZT/XU/UC
DEH-MG8257ZT/UC
CONTENTS
1. CIRCUIT OVER VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. MECHANISM OVER VIEW . . . . . . . . . . . . . . . . . . . . . . 23
3. DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4. HOW TO ASSEMBLE . . . . . . . . . . . . . . . . . . . . . . . . . . 45
PIONEER CORPORATION
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 2005
Service Manual
CRT3458
CRT3480
CRT3486
CRT3487
4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
CD Mechanism Module
CXK7300
CXK7300
CXK7310
CXK7310
K-ZZU. APR. 2005 Printed in Japan
ORDER NO.
CRT3467
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Summary of Contents for Pioneer CX-3168

  • Page 1 PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, 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 2005 K-ZZU.

  • Page 2: Circuit Over View

    *X-3116 has built-in WMA decoder by each LSI function, but is not corresponded to its specification. Built-in SRAM (1M bit) CD-ROM SDRAM Buffer memory decoder 16Mbit RF amp controller (BMC) MP3/WMA Signal decoder processing Digital servo UPD63763AGJ, Audio output UPD63761AGJ Microcomputer Fig.1 UPD63763AGJ(X-3168),UPD63761AGJ(X-3116) block diagram CX-3168...
  • Page 3 LD1 and V3 R3 and dividing the value by 7.5 , and its current value should be about 30mA. PU unit CD core unit REG 1.25V 6R5K 6R5K VREF 100K 110K 100K UPD63763AGJ, UPD63761AGJ Fig.2 APC CX-3168...
  • Page 4 TE output generates 1.15Vpp level TE waveform based on REFO. The cut-off frequency of the amp in back stage is 21.1kHz. UPD63763AGJ, CD core unit UPD63761AGJ TE A/D TEOFF setting PU unit 160K 45R36K 181K E 11 112K VERF 45R36K 160K 160K 112K Internal TEC VREF Fig.3 TE CX-3168...
  • Page 5 RFO signal. This reference voltage ASY is generated with passing EFM comparator output through LPF. EFM signal is output from the number 111 pin. UPD63763AGJ, UPD63761AGJ EFM signal 100K Fig.4 EFM CX-3168...
  • Page 6 FZD register and latched to "H" again (the edge of FDZ). As the result, FE converges "0" (=REFO). IC302 IC201 UPD63763AGJ,UPD63761AGJ BD7962FM DIG. LENS R218 R311 CONTROL FOCUS SEARCH 8R2K TRIANGULAR C219 WAVE GENERATOR 1000pF Fig.5 Focus servo block diagram CX-3168...
  • Page 7 "display 01" in the test mode, it is possible to check S curve, search voltage and actual lens operation. REFO Zoom-in of "focusing point" REFO threshold level (internal signal) Usually, focus-close occurs at these points. (focus is closed) Fig.6 Focus-close sequence CX-3168...
  • Page 8 FF/REW operation in normal mode is carried out with executing a single jump continuously. The speed is varied according to place of destination and is about 10 or 20 times of normal mode. GAIN UP 50ms EQUALIZER NORMAL T.BRAKE OPEN SERVO CLOSED Fig.9-1 Multi-track jump CX-3168...
  • Page 9 (Internal signal) MIRR MIRR is latched by the edge of TZC pulse. SWITCHING PULSE EQUALIZER OUTPUT (SWITCHED) DRIVE DIRECTION REVERSE FORWARD Time (NOTES) The phase of equalizer output is written as the same as TEC phase. Fig.10 Tracking brake circuit CX-3168...
  • Page 10 KICK, BRAKE REGISTERS Fig.11 Carriage servo block diagramFig 16: Carriage servo block diagram TRACKING DRIVE (LOW FREQUENCY) LENS POSITION DRIVE ON/OFF THRESHOL D CRG DRIVE (INSIDE UPD63711GC) CRG MOTOR VOLTAGE Carriage is moved by these points. Fig.12 Carriage signal waveform CX-3168...
  • Page 11 (speed) and decreases the brake level and stops it when the speed is under that. C307 0.01µ IC201 UPD63763AGJ,UPD63761AGJ R320 IC301 SPEED ERROR SIGNAL BA6859AFP DIG. BLOCK SIGNAL R322 PHASE ERROR SIGNAL SPINDLE MOTOR IC302 SPCONT BD7962FM Fig.13 Spindle servo block diagram CX-3168...
  • Page 12 Ech or Fch according to certain rule. In addition, a series of adjustment steps is repeated several times to increase adjustment accuracy. Then, repeat step 2) - 4) until reaching "offset volume = 0" or "limit number" and adjustment is finished. CX-3168...
  • Page 13 + 12dB + 6dB Detecting that "lens is dirty" and playing with +6dB from the start Time +6dB play increases because of dirt of lens, etc. (Set-up starts with TYP gain.) Fig.14 Conceptual diagram of gain of preamp stage CX-3168...
  • Page 14 Coefficient = 7 - 0 ..Decreasing RF level (Decreasing gain) If a coefficient moves 1, 0.7 - 1dB of gain changes accordingly. Maximum gain = when a coefficient is 15, TYP +6.5dB Minimum gain = when a coefficient is 0, TYP - 6.0dB CX-3168...
  • Page 15 LSI(CD DSP) Diode V1R5(1.5V) IC204 P.U unit IC201 IC202 X-3116 SWDVDD(5V) SPDL switching switching Driver SWDVDD2(5V) SVCONT PGND Power supply CD contorol VDD circuit micro computer System side 3.3V 3.3V Reg 3VDD BVDD IC701 Control unit Fig.15 Power supply section CX-3168...
  • Page 16 By repeating this process, SDRAM is always utilized effectively and data during 12 seconds (at the time of CD-DA) can be stored. For example, pick up is out of the track because of vibration, sound break is avoided if recovery is performed within 12 seconds by using memory. CX-3168...
  • Page 17 Hi-Z/L of ELVVOL1,ELVVOL2. Drive voltage (E/LVOL1=Hi-Z, E/LVOL2=Hi-Z) ; 8V Drive voltage (E/LVOL1=L, E/LVOL2=Hi-Z) ; 7V Drive voltage (E/LVOL1=Hi-Z, E/LVOL2=L) ; 4.4V IC701 IC302 LOADPHT E/L+ E/LFWD LOADSWR 3+3ch MECHANISM DRIVER MOTOR CONTROLLER LOADSWL E/LREV IN/SW E/L- E/LVOL1 E/LVOL2 SWDVDD2 CX-3168...
  • Page 18 It uses a linear position sensor (VR1), converts stage chassis level to voltage value and captures it by a microcomputer A/D to detect absolute position. Detect circuit SWDVDD VR11 ELVREF ELVSNS 2.2) Drive system Controlling an E/L motor by the control unit enables the following function. Elevation function CX-3168...
  • Page 19 1 Driving continuously to the position of brake start. 2 Detecting of passing the position of brake start and starting short brake. 3 Starting of driving pulse to reach OK range. After confirmation of entering OK range, it is completed. CX-3168...
  • Page 20 Controlling a cam gear motor by the control unit enables the following function: Open/close of shutter Open /close of tray tab Division of tray Rotation operation of CRG chassis (moving to the play position) Release of mechanism lock Drive of eject arm CX-3168...
  • Page 21 1 Driving continuously to the position of brake start. 2 Detecting of passing the position of brake start and starting short brake or reverse brake. 3 Starting of driving pulse to reach OK range. After confirmation of entering OK range, it is completed. CX-3168...
  • Page 22 4.2) Drive system It operates a pickup unit to move to inner side from normal replay position and moves clamp mechanism of a DISC. a) Drive circuit IC701 IC201 IC302 HOME CLAMP CARRIAGE 3+3ch CONTROL DRIVER MOTOR MECHANISM CONTROLLER REFO CX-3168...

  • Page 23: Mechanism Over View

    Tray separation operation Carriage mechanism assembly rotation operation Eject arm operation Shutter opening/closing operation Tray claw opening/closing operation Elevation motor Elevation operation Loading/ejection rollers rotation operation Carriage motor Search operation Spindle motor Disc clamp claw opening/closing operation Disc rotation operation CX-3168...
  • Page 24 Cam gear motor Elevation motor Carriage motor Spindle motor The operations carried out using the motors as a motive power are described below. CX-3168...
  • Page 25 The following five operations are carried out by using the rotary motions of the cam gear motor as a motive power. a.Tray separation operation b.Tray claw opening/closing operation c.Carriage mechanism assembly rotation operation d.Eject arm operation e.Shutter opening/closing operation Cam motor Eject arm Stage link lever Cam gear Cylindrical cam drive gear Eject driving arm CX-3168...
  • Page 26 In addition, the appearance of trays being separated at the time of loading or playing disc #3 is shown below as an example. 3F ELEV O.K. DISC#3 LOAD 3F ELEV O.K. DISC#3 PLAY (LOAD) Stage 1F (PLAY) Stage 3F Stage 1F Tray group 3F Stage 3F Tray group 1F Tray group 3F Tray group 1F CX-3168...
  • Page 27 D stage link lever and CRG rotating lever are in mesh with each other. The CRG block rotates to travel to the disc playing position in synchronous with the stage link lever movements. The CRG block is fixed with the CRG lock arm and other components at the disc playing position. CRG rotation lever CRG rotation arm CRG lock arm CX-3168...
  • Page 28 ELEV 2 gear is slid by the force transferred from the eject driving arm. At the same time, the shutter, which protects the disc insertion slot engaged with the ELEV 2 gear unit, opens/closes. ELEV 2 gear unit : It slides by the force transferred from the eject driving arm. CX-3168...
  • Page 29 When the stair is located at one of positions 6 to - the tray group does not move up and down but stays at 1F. In this case, the stage moves up and down to select a disc. To play a disc, the stair should be located at one of those positions. CX-3168...
  • Page 30 At the time of loading/ejecting a disc, the ELEV 2 gear slides to separate the row of gears which transfers the stair force. Therefore the stair does not move. Roller drive gear: It moves up and down simultaneously with the stage. ELEV motor ELEV 2 gear: It slides. CX-3168...
  • Page 31 At the time of playing, the disc is clamped with the three claws. The claws open to unclamp the disc when the support wheel mechanism shifts the pickup to the support wheel, or the claws close to clamp it for the search operation. Pickup Disc clamp claws (open) Support wheel Feed screw CX-3168...
  • Page 32 Hi status. INIT switch Load switch Load switch Phototransistor The group of sensors recognizes the disc state as shown below. Eject Load Photo Detection switch, right Detection switch, left INIT SW Loading starts Ejection stops Loading completes CX-3168...
  • Page 33 1 The stage moves to the position of the tray which has the disc to be played by the ELEV operation. 2 Tray separation and CRG rotation actions are taken by the cam operation. 3 The disc is clamped. CX-3168...
  • Page 34 Position detected by the linear position sensor STG elevation 1F Play & loading height Tray groups elevation Cam operation: 6F Loading Position detection by the rotary position sensor height Loading Eject position position Linear position sensor Rotary position sensor CX-3168...

  • Page 35: Disassembly

    3 Carry out short-soldering. (There are two points to be short-soldered. It is enough to solder one of them.) 4 Slide the lock section of the connector to fix a flexible cable and remove a flexible cable. (2 points) Short-soldering CX-3168...
  • Page 36 1 Remove poly washer. Remove the ELEV 4 gear. Once the ELEV 4 gear is removed, the stair can be slid as desired. ELEV 4 gear *In the illustration above, the ELEV 3 gear is removed. But the ELEV 3 gear is not required to be removed. CX-3168...
  • Page 37 In a stair, 3 of F (front), L (left) and R (right) are linked by an arm at the bottom of mechanics, and when moving it to <- direction, a stage moves to the top. (clockwise when looking from upward) CX-3168...
  • Page 38 4 Manually slide the stair to lower the stage. 5 Remove four screws which are used to secure the upper case. Remove the upper case. 6 Lightly slide the snap-fitted top arm to remove it. This screw is not required to be removed. Top arm CX-3168...
  • Page 39 3.3 HOW TO REMOVE THE STAIR 1 Slide the stair in the direction for lowering the tray block until it will go no further. (See the photo shown below.) 2 Remove three stairs. Direction of slide CX-3168...
  • Page 40 3.4 HOW TO REMOVE THE STAGE 1 Desolder the back right cam motor. Then, remove the flexible cable. Desolder this part. CX-3168...
  • Page 41 2 Draw out the stage block in vertical direction. 3 Lift up the triangular top plate in the vertical direction, then slide it away from you until it comes off. 4 Remove the tray and cylindrical cam from the stage. Tray Cylindrical Cam CX-3168...
  • Page 42 COVERED BY OUR SERVICE) 1 Slide the part with which the stage link lever is in mesh toward you. Turn the CRG to move it to the play position. 2 Remove the resin part and springs. 3 Remove the CRG. CX-3168...
  • Page 43 3.7 HOW TO REMOVE THE ELEV MOTOR 1 Check that the ELEV3 gear is removed 2 Remove the solder of two lines (red and white) on the rear side of main chassis 3 Unscrew the three screws shown in the figure CX-3168...
  • Page 44 4 Remove the resin part. At this time, it can be removed easily by applying edgewise pressure to the point shown in the figure using the straight slot screwdriver 5 Pull out the gear shaft, and remove the gear 6 Unscrew the two screws fixing the motor and remove the wire lead CX-3168...

  • Page 45: How To Assemble

    · Check the location of stage lock arm of STG. It is not like as shown in the figure below, move the arm to the position of mark. In a similar way, for the white resin part, move the arm to the position as shown in the photo below. Contacting Positioning to the mark Location of STG lock arm CX-3168...
  • Page 46 At this time, check the part pointed in the figure does not drop off the groove. When it is dropping off the groove, set it paying attention to the position shown in the photo below. Location to attach the white resin CX-3168...
  • Page 47 Connect the white wire lead to the white mark side on bottom panel of motor. Mark on bottom panel of motor How to connect the wire lead · Fix the motor to the bracket with screws How to fix the bracket CX-3168...
  • Page 48 How to fix the resin part · Secure the three screws How to fix the ELEV motor unit · Solder the wire lead to the board on the rear side of main chassis, and fix it with tape. tape RD: red WH: white CX-3168...
  • Page 49 How to fix the motor Mark for attaching the motor · Attach the CAM gear, and fix the CAM motor unit with two screws CAM gear Location to attach the CAM motor unit Location to attach the CAM gear CX-3168...
  • Page 50 4.4 ASSEMBLING THE STAGE UNIT 1 Prepare the tray Pile the 6 trays so that the tray with steel plate is at the bottom Tray (6-pile) CX-3168...
  • Page 51 At this time, attach the black cylinder cam at the right back. Location to attach the cylinder cam OUT Rotate the matched cylinder cam and match the marks of STG and cam (for all cams). Left back Right back Left front Location of mark of cylinder cam OUT CX-3168...
  • Page 52 3 From rear side of main chassis, insert the assembly jig to the cylinder cam gear (x3). Assembly jig GGF1538*3 After inserting the assembly jig CX-3168...
  • Page 53 Match the tip of assembly jig to the depressed portion on the bottom panel of cylinder cam IN. Key groove Depressed portion Key part Cylinder cam IN Cylinder cam gear 5 Attaching the STG At this time, as the right front part does not have a bracket, support it with something. After attaching the STG CX-3168...
  • Page 54 * In this operation, take notice that the cylinder cam whose mark is matched in step 2 may jolt out of alignment. If it jolts out of alignment, reposition the key groove and mark. 6 Place the tray. At this time, the tray pin should be inserted to the location shown in the figure. State of attached tray CX-3168...
  • Page 55 Check it is properly set (3 parts) as shown in the figure at lower right. Slide Direction to slide the tray holder Tray holder rigid part 8 Pick up the main chassis slowly, and pull out the jig The STG unit is properly assembled CX-3168...
  • Page 56 Check that is properly set (5 parts) as shown in the figure below. Next, slide the attached stair to left side slightly (figure below). 2 Attach the stair on left side safe. Check that is properly set (6 parts) as shown in the figure below. CX-3168...
  • Page 57 * When attaching the front stair, fix the front side to the upper panel, and when attaching the left panel stair and rear panel stair, fix the side panel to the upper panel. · Slide the stair to the left Check the all stairs are fitted in the groove, and slide the stairs to the left. CX-3168...
  • Page 58 4 Solder the two cam motors 5 Check the side panel flexible cable is not removed. CX-3168...
  • Page 59 How to attach the upper case Hook the detection lever to the rear side of front panel of shutter. * Push the detection lever to the left side lifting the left part of upper case Abnormal Normal Location of detection lever CX-3168...
  • Page 60 7 Secure the screws Secure the four screws on the panels below. Left panel Rear panel Right panel CX-3168...
  • Page 61 Hook the spring which is temporarily hooked to the A part to B part. Spring of left back part * If failing to hook the spring, remove the STG again, and hook the spring again as shown in the photo below. Left back part of stage frame CX-3168...
  • Page 62 0 Attach the top arm As shown in the figure, attach it sliding it aside after insert it vertically from above As shown in the photo below, press it with a finger, and set it as shown in the right figure. CX-3168...
  • Page 63 ! When the ELEV3 gear is removed, set it by pressing as shown below. ELEV3 gear Attach the ELEV4 gear, and fix it with poly washer. @ Insert the two flexible cable as shown in the figure below, and slide and lock the claw, and then remove the short-soldering. CX-3168...

This manual is also suitable for:

Cx-3116