Pioneer CX-3116 Service Manual Download Page 4 | Manualshive

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CX-3168

4

1

2

3

4

1

2

3

4

C

D

F

A

B

E

1.1.3 Focus error amp

1.1.4 RFOK circuit

1.1.5 Tracking error amp

Fig.3 TE

P5

VERF

E 11

F

E

F

9

11

9

P6

P1

P10

130

112K

160K

129

112K

160K

160K

63K

80K

181K

45R36K

45R36K

+
-

63K

+
-

+
-

VREF

TEOFF setting

TE A/D

+
-

+
-

+
-

+
-

60K

20K

Internal TEC

139

TEO

138

TE-

140

TE2

141

TEC

47P

68P

CD core unit

PU unit

UPD63763AGJ,
UPD63761AGJ

The photodetector output (A+C), (B+D) comes from the number 91 pin as FE signal which is (A+C-B-D) through
differential amp and then error amp. The low frequency of voltage FE is showed in the following formula.
FE=(A+C-B-D) X 8.8k / 10k X 111k / 61k X 160k / 64k =(A+C-B-D) X 4
The FE output generates 1.5Vpp of S curve based on REFO. The cut-off frequency of the amp in back stage is 14.6kHz.

This circuit is signal expressing timing of focus-close and focus-close condition during playing, and output from the
number 55 pin as RFOK signal output. During playing at focus-close, "H" is output as signal.
Since RFOK signal holds a peak of DC level of RFAGCI at digital section in back stage and is converted and generated
by certain threshold level, RFOK is "H" without a bit. Therefore, focus-close is also performed in disc mirror surface. This
signal is supplied to a microcomputer via LPF as FOK signal and used for protection and switching gain of RF amp.

The photodetector output E, F comes from the number 139 pin, taking (E-F) as TE signal through a differential amp and
then an error amp. The low frequency of TE is showed in the following formula.
TEO=(E-F) X 63k / 112k X 160k / 160k X 181k / 45.4k X 160k / 80k = (E-F) X 4.48

TE output generates 1.15Vpp level TE waveform based on REFO. The cut-off frequency of the amp in back stage is
21.1kHz.

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Summary of Contents for CX-3116

Page 1: ...05 Printed in Japan 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 Service Manual CD Mechanism Module AVIC XD1057ZF UC AVIC XD1557ZF UC AVIC XD1957ZF UC CRT3458 CXK7300 DEH MG2057ZF XU UC CRT3480 CX...

Page 2: ... bit Buffer memory controller BMC MP3 WMA decoder DAC Concerning CD LSI beside the core DSP LSI which unifies DAC once used as peripheral circuit or RF amp is the mainstream and UPD63763AGJ UPD63761AGJ is a multifunction LSI which has a plenty of functions such as existing CD and replay CD ROM storing MP3 WMA file by embedding CD ROM decoder or MP3 WMA decoder X 3116 has built in WMA decoder by ea...

Page 3: ...ss signal This preamp section is embedded in CD LSI UPD63763AGJ UPD63761AGJ IC201 and each section of it is explained below Since the spec of this LSI is single power supply 3 3V reference voltage of this LSI and pick up should be all REFO 1 65V REFO is the output from REFOUT in the LSI through buffer amp and its output comes from the number 133 pin of the LSI All measurement is based on the REFO ...

Page 4: ...circuit is signal expressing timing of focus close and focus close condition during playing and output from the number 55 pin as RFOK signal output During playing at focus close H is output as signal Since RFOK signal holds a peak of DC level of RFAGCI at digital section in back stage and is converted and generated by certain threshold level RFOK is H without a bit Therefore focus close is also pe...

Page 5: ...calculated and this level is over D range of an operation amp and so that the signal is clipped but only empty cross point is used in CD LSI so there is no problem EFM circuit is the circuit for converting RF signal into 0 1 digital signal AGCO signal output from the number 116 pin is AC combined input to the number 114 pin and supplied to EFM circuit Since RF vertical asymmetry occurred because o...

Page 6: ...ss error signal of a spindle servo is generated and supplied to the spindle servo section and outputs drive signal for the spindle Each drive signal of focus tracking carriage and spindle is amplified by the driver IC BD7962FM IC302 after that and supplied to each actuator and motor The main equalizer of focus servo is made up of digital equalizer section The fig 10 shows a block diagram of focus ...

Page 7: ...d above are set and focus close is performed XSI terminal becomes H L and after 40ms the microcomputer starts to monitor RFOK signal through LPF When RFOK signal is detected as L the microcomputer takes a various action such as protection Fig 11 shows a series of action concerning focus close this figure shows a case when focus close is impossible If pressing focus close button in condition that a...

Page 8: ...ove can be checked by mode selection For jumps up to 4 tracks about half number of total jumps e g about 2 tracks are set for 4 tracks are set by microcomputer The speed control which counts the length of TEC interval and controls TD so as to keep a constant frequency is conducted for any jump up to 5 100 tracks and a target number of total tracks is set by microcomputer The established number of ...

Page 9: ...REVERSE Fig 10 Tracking brake circuit Since lead in of servo is weakened during set up or track jump stable lead in to servo loop is performed using a brake circuit The brake circuit detects the direction of a lens and outputs only the drive signal of the cross direction toward its operation to slow the lens speed down and performs stable lead in to the tracking servo In addition the direction for...

Page 10: ...er acquiring fixed gain it outputs drive signal from LSI The signal is impressed to carriage motor via driver IC To be more precise since it is necessary to move the entire pick up to forward direction when lens off set during playing reaches to certain level the gain of equalizer is set to generate higher voltage than start up voltage of carriage motor at that time In addition actual operation is...

Page 11: ...ervo mode of normal operation It takes a sample of WFCK 16 at EFM demodulation block to check whether frame synchronized signal and internal frame counter output agree then generates signal showing agree or disagree When this signal shows disagree 8 times continuously it is considered as asynchronous and otherwise it is considered as synchronous This adaptation servo selects lead in servo in async...

Page 12: ... of 0 positive or negative If offset volume 0 adjustment is finished If offset volume positive or negative change amp gain of Ech or Fch according to certain rule Then repeat step 2 4 until reaching offset volume 0 or limit number and adjustment is finished 4 FE bias automatic adjustment With this adjustment RFI level is maximized by making focus point during playing optimal Adjustment is performe...

Page 13: ...ired RFO level of amp gain volume from read value 3 The microcomputer sends an appropriate command to servo LSI to reach to the gain volume of 2 This adjustment is performed at the following timing During set up only focus close is finished At the point of set up completion just before playing During playing after recovering from out of focus 7 Adjustment of gain of preamp stage If there is lens d...

Page 14: ...value 32 Coefficient 32 means no adjustment was required Indication is every approx 40mV Example FZD cancel coefficient 35 35 32 3X40mV 120mV Since corrected volume is about 120mV FE offset before correction is 120mV 2 F T gain adjustment Reference value focus tracking 20 Coefficient indication reference value express adjusted volume Example AGC coefficient 40 40 20 2 times 6dB adjustment was perf...

Page 15: ...rol micro computer VDD switching Fig 15 Power supply section 3 3V Reg 1 5V Reg 3 3V Reg 3 3V BVDD IC701 Control unit 3VDD X 3116 SD RAM VDD switching SPDL Driver PGND VD 8V Power supply for mechanism servo It supplies to driver directly and also generates 3 3V and 1 5V compression model with a regulator in the unit VDD 5V Power supply for microcomputer If back up B is connected it is always suppli...

Page 16: ... outputs DAC Since the writing speed is faster than the reading speed from SDRAM the memory may overflow soon However if it overflows reading is stopped temporarily and to be in pause Reading data from SDRAM continues and when empty space is available writing data is restarted Remaining RAM can be monitored by RAM0 RAM1 and RAM2 terminal By repeating this process SDRAM is always utilized effective...

Page 17: ...tion elevation operation and clamp operation enables the operation as changer mechanism module 1 Loading system Disc position is detected with 3 switches attached to mechanism unit photo and LED and load eject is performed by driving an E L motor E L is abbreviation of Elevation Loading G3 mechanism shares a motor unlike G2 mechanism 1 1 Detect system The 3 switches photo and LED operate load star...

Page 18: ...ejecting 1 Starting driving H of LOADSWR 2 Detecting L of INISW 3 Detecting L of LOADSWL and after reverse brake 16ms stopping E L monitor 2 Elevation system 2 1 Detect system 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 2 2 Drive system Controlling an E L motor by the control un...

Page 19: ...OK range it is completed Driving upper direction E L E L E LFWD H E LREV L Driving lower direction E L E L E LFWD L E LREV H Drive voltage CAMVOL Hi Z 8VCAMVOL L 7V CAMVOL L 7V IC701 E LVOL1 E LVOL2 SWDVDD2 LOADPHT LOADSWL LOADSWR E LFWD E L E L MOTOR E L E LREV IN SW MECHANISM CONTROLLER 91 58 57 43 31 7 30 32 IC302 3 3ch DRIVER 4 5 2 8 3 t controls drive direction by output E LFWD E LREV from th...

Page 20: ... position sensor VR2 converts a camgear rotation angle to voltage value and captures it by a microcomputer A D to detect absolute position 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 ...

Page 21: ...eted VR2 IC702 CAMVOL SWDVDD2 CAMSNS CAMREF CAMFWD CAM CAMGEAR MOTOR CAM CAMREV MECHANISM CONTROLLER 94 95 89 53 90 IC301 3 3ch DRIVER 7 6 35 9 34 VR21 It controls drive direction by output CAMFWD and CAMREV from the microcomputer IC701 and two values of drive voltage by Hi Z L of CAMVOL Driving CRG chassis to the outer direction direction of EJECT position AM CAM CAMFWD H CAMREV L Driving CRG cha...

Page 22: ...ch DRIVER 32 36 20 19 S2 4 SPDL clamp system 4 1 Detect system 4 2 Drive system a Drive circuit It is composed of two switches such as HOME switch used in servo system S1 and CLAMP switch S2 for checking a shutter of the tab inside it It operates a pickup unit to move to inner side from normal replay position and moves clamp mechanism of a DISC ...

Page 23: ...down with the stage block The stage block is joined to the main chassis section with a stair and link lever Sliding the stair moves the entire stage block moves up and down Moving the link lever allows the CRG to rotate to play a disc The tray block consists of six trays Similarly to the stage block the tray block moves up and down as the stair slides To play the disc the stage block moves toward ...

Page 24: ...CX 3168 24 1 2 3 4 1 2 3 4 C D F A B E The operations carried out using the motors as a motive power are described below Cam gear motor Elevation motor Carriage motor Spindle motor ...

Page 25: ... 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 Eject arm Cam motor Cam gear Cylindrical cam drive gear Eject driving arm Stage link lever ...

Page 26: ...r playing disc 3 is shown below as an example 3F ELEV O K LOAD Stage 1F Tray group 3F DISC 3 LOAD Stage 1F Tray group 3F 3F ELEV O K PLAY Stage 3F Tray group 1F DISC 3 PLAY Stage 3F Tray group 1F Cylindrical cam green It is mounted on the stage It moves up and down in synchronous with the stage Cylindrical cam yellow It is mounted on the upper tray holder It goes up in synchronous with the holder ...

Page 27: ...re simultaneously opened closed c Carriage mechanism assembly rotation operation 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 Tray claw right CRG rotation lever CRG rot...

Page 28: ...m the eject driving arm to push the disc out e Shutter opening closing operation 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 ...

Page 29: ...e following 11 ones according to a change in the stair position The stair position is detected by the linear position sensor When the stair is located at one of positions 1 to 6 the stage does not move up and down but stays at 1F In this case the tray group moves up and down to select a disc To load or eject a disc the stair should be located at one of those positions When the stair is located at ...

Page 30: ...motor As a result the load eject roller rotates as the elevation motor rotates This draws ejects a disc 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 ...

Page 31: ...by reducing the rotating speed of the carriage motor with a worm and driving the feed screw 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 ...

Page 32: ... When the white resin lever is pressed to the right by the disc the switch is brought to its Hi status Load switch left It is mounted on the left side of the disc insertion slot When the white resin lever is pressed to the left by the disc the switch is brought to its Hi status INIT switch It is mounted at the right back of the stage When the resin arm moves from its home position the switch is br...

Page 33: ...sc 4 The disc is drawn inside by rotary motions of the roller 5 The disc drawn into the predetermined position is detected 2 5 3 Ejection operation Operation sequence from the ELEV O K state to the ejection of a disc is carried out as described below 1 Tray from which a disc is to be inserted is selected by moving the tray group up and down by the elevation operation The tray from which the disc i...

Page 34: ...eration is presented in vertical direction of the diagram Transition of the state of tray separation and CRG position by the cam operation is presented in horizontal direction of the diagram As shown in the diagram the position of tray group and stage at the time of loading and ejection is same with that at the time of play only in the case of the disc 1 Play position ELEV O K position STG elevati...

Page 35: ...sm in the ELEV O K state 2 Eliminate static electricity with a wrist band etc 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 ...

Page 36: ...TO REMOVE THE UPPER CASE 1 Remove poly washer Remove the ELEV 4 gear Once the ELEV 4 gear is removed the stair can be slid as desired In the illustration above the ELEV 3 gear is removed But the ELEV 3 gear is not required to be removed ELEV 4 gear ...

Page 37: ...porary position The hook at the temporary position is fixed on the stage This means that the stage needs to be raised to the uppermost floor to enable easy re positioning of the spring Home position Temporary position Spring B Spring A 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 l...

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 2 1 3 4 This screw is not required to be removed Top arm ...

Page 39: ...5 6 7 8 5 6 7 8 C D F A B E 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 ...

Page 40: ...CX 3168 40 1 2 3 4 1 2 3 4 C D F A B E 3 4 HOW TO REMOVE THE STAGE 1 Desolder the back right cam motor Then remove the flexible cable Desolder this part ...

Page 41: ... E 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 3 2 Tray Cylindrical Cam ...

Page 42: ... load frame at four points Remove the load frame Note Remove springs from metal plate hook but not necessarily from the resin collar 2 1 Screw Screw Screw Screw 3 6 HOW TO REMOVE THE CRG ONLY FOR REFERENCE SINCE THIS PROCEDURE IS HARD TO BE 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 p...

Page 43: ... 5 6 7 8 C D F A B E 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 ...

Page 44: ...in 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 ...

Page 45: ... chassis can be seen from the hole of cam it is not necessary to match it perfectly 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 Location of CAM gear Contacting Positioning to the mark Location of STG lock arm ...

Page 46: ...4 C D F A B E 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 ...

Page 47: ...is not removed this step is not necessary Press the gear into motor and attach the wire lead Connect the white wire lead to the white mark side on bottom panel of motor Fix the motor to the bracket with screws Mark on bottom panel of motor How to connect the wire lead How to fix the bracket ...

Page 48: ...ain chassis Secure the three screws Solder the wire lead to the board on the rear side of main chassis and fix it with tape How to fix the resin part How to fix the ELEV motor unit Hook the tip of resin part Insert this prong to the hole of resin RD red WH white tape ...

Page 49: ...crews At this time take care of the direction to fix the gear Check the location of mark is as shown in the photo shown in lower right Attach the CAM gear and fix the CAM motor unit with two screws Mark CAM gear How to fix the motor Mark for attaching the motor Location to attach the CAM gear Location to attach the CAM motor unit ...

Page 50: ...CX 3168 50 1 2 3 4 1 2 3 4 C D F A B E 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 ...

Page 51: ...der cam OUT to the stage At this time attach the black cylinder cam at the right back Rotate the matched cylinder cam and match the marks of STG and cam for all cams Location to attach the cylinder cam OUT Location of mark of cylinder cam OUT Left back Right back Left front ...

Page 52: ...CX 3168 52 1 2 3 4 1 2 3 4 C D F A B E 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 ...

Page 53: ... groove of inside of cylinder cam IN Match the tip of assembly jig to the depressed portion on the bottom panel of cylinder cam IN 5 Attaching the STG At this time as the right front part does not have a bracket support it with something Key groove Key part Depressed portion Cylinder cam IN Cylinder cam gear After attaching the STG ...

Page 54: ...n chassis fits the both of stage link lever and white resin part 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 Left front Right front Right panel State of attached tray ...

Page 55: ...ard and fix it At this time take notice that the black sheet on the rear side of tray holder sticks easily in the tray Check it is properly set 3 parts as shown in the figure at lower right 8 Pick up the main chassis slowly and pull out the jig Slide Direction to slide the tray holder Tray holder rigid part The STG unit is properly assembled ...

Page 56: ...VE TO COMPLETION 1 Attach the front stair 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 ...

Page 57: ...e below Attach the stair Check that the eight positions shown in the figure below are properly set 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 ...

Page 58: ...CX 3168 58 1 2 3 4 1 2 3 4 C D F A B E 4 Solder the two cam motors 5 Check the side panel flexible cable is not removed ...

Page 59: ...by fitting the right side opening the shutter and right side after fitting the left side The state of mechanism is recommended to be at 1F play position 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 How to attach the upper case Abnormal Location of detection lever Normal ...

Page 60: ...CX 3168 60 1 2 3 4 1 2 3 4 C D F A B E 7 Secure the screws Secure the four screws on the panels below Left panel Right panel Rear panel ...

Page 61: ...by sliding it and hook the spring at left back Hook the spring which is temporarily hooked to the A part to B part If failing to hook the spring remove the STG again and hook the spring again as shown in the photo below Spring of left back part Left back part of stage frame ...

Page 62: ...ang the spring on the hook shown in the figure below 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 Right front spring ...

Page 63: ... the ELEV3 gear is removed set it by pressing as shown below 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 ELEV3 gear ...

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