Pioneer CX-3195 Service Manual

Text of Pioneer CX-3195 User Guide:

• Pioneer CX-3195, ORDER NO. 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 2006 CRT3815 CD MECHANISM MODULE(S10.5COMP2) CX-3195 Model Service Manual CD Mechanism Module 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. DEH-2900

• Pioneer CX-3195, CX-3195 2 1234 1234 C D F A B E CONTENTS 1. CIRCUIT DESCRIPTIONS ............................................................................................................................... 3 2. MECHANISM DESCRIPTIONS...................................................................................................................... 20 3. DISASSEMBLY .............................................................................................................................................. 22

• Pioneer CX-3195, CX-3195 3 5 678 56 7 8 C D F A B E 1. CIRCUIT DESCRIPTIONS V850ES core BMC EFM decoder 1bit DAC Internal RAM (1Mbit) PE5547A Port control Audio DSP CIRC PORT I/F SRAM Analog output RF amplifier CD-ROM decoder Digital servo A,B,E,F Signal The recent mainstay of the CD LSI is the LSI integrating the core DSP with DAC or RF amplifier, which are generally employed as peripheral circuits, however, PE5547A, used in this product, is an LSI integrating the afore-mentioned LSI unit and microcomputer unit in one chip. Fig.1.0.1 Block diagram of CD LSI PE5547A

• Pioneer CX-3195, CX-3195 4 1234 1234 C D F A B E 6.5k + - 1k 100k + - 6.5k 100k + - 150k 1k REG 1.25V Vref 3p 142 PD LD PE5547A 143 + 5 7 15 5 7 15 14 14 Pickup Unit CD CORE UNIT 2R4 x 2 2SA1577 LD- LD+ MD VR LDS APN 2R7 4.7 In the preamplifier block, the pickup output signals are processed to generate signals that are used in the subsequent blocks: servo, demodulator, and control blocks. Signals from the pickup are I/V converted in the pickup with the preamplifier with built-in photo detectors, and after added with the RF amplifier, they are used to produce such signals as RF, FE, TE, and TE zero-cross signals. The preamplifier block is built in CD LSI PE5547A (IC201), whose parts are descr

• Pioneer CX-3195, CX-3195 5 5 678 56 7 8 C D F A B E 13 6 A+C B+C VREF 13 6 10k 8.8k 10k 8.8k 61.0k 61.0k 140k R2 15.2k 15.2k 44k 20k 11.75k 3.55k 5k 5k 129 130 125 123 124 119 135 134 RFOFF setup FEOFF setup VREF VREF A B RFO AGCI RF2- RF- EQ2 EQ1 AGCO FEO FE- FE A/D 121 122 + - + - + - + - + - + - - + P3 P7 P9 P2 P4 P8 Pickup Unit CD CORE UNIT PE5547A 4.7k 5.6k 1.2k 1.2k 22p 56p 4p 126 For RFOK generation To DEFECT/A3T detection 160k 1.1.2 RF and RFAGC amplifiers The output from the photo-detector (A + C) and (B + D) is provided from the RFO terminal as the RF signal (which can be used for

• Pioneer CX-3195, CX-3195 6 1234 1234 C D F A B E 11 9 E F VREF 11 9 112k 112k 63k 45.36k 63k 160k 160k 45.36k 161k 80k 160k 60k 20k 132 131 TEOFF setup TE A/D Inside TEC Pickup Unit P5 P10 P1 P6 E F PE5547A CD CORE UNIT + - + - + - + - + - + - - + VREF TEO TE- TEC TE2 138 137 139 140 47p 10000p 1.1.3 Focus error amplifier The photo-detector outputs (A + C) and (B + D) are passed through the differential amplifier and the error amplifier, and (A + C - B - D) is provided from the pin 135 as the FE signal. The low frequency component of the voltage FE is calculated as below. FE = (A + C - B - D) x 8.8k / 10k x 111k / 61k x 160k / 72k = (A + C - B - D) x 3.5 For the FE outputs, an S-shaped curve of 1.5

• Pioneer CX-3195, CX-3195 7 5 678 56 7 8 C D F A B E 1.1.6 Tracking zero-cross amplifier The tracking zero-cross signal (hereinafter referred to as TEC signal) is obtained by amplifying the TE signal by fourfold, and used to detect the tracking-error zero-cross point. As the purpose of detecting the zero-cross point, the following two points can be named: 1. To use for track-counting in the carriage move and track jump modes 2. To use for detecting the direction in which the lens moves in tracking close. (Used in the tracking brake circuit to be explained later.) The frequency range of the TEC signal is from 300 Hz to 20 kHz, and TEC voltage = TE level x 4 The TEC level can be calculated at 4.62

• Pioneer CX-3195, CX-3195 8 1234 1234 C D F A B E The servo block performs servo control such as error signal equalizing, in-focus, track jump and carriage move. The DSP block is the signal-processing unit, where data decoding, error correction, and compensation are performed. The FE and TE signals, generated in the preamplifier stage, are A/D-converted, and output drive signals for the focus, tracking, and carriage systems via the servo block. Also, the EFM signal is decoded in the signal-processing unit, and ends up in outputting D/A-converted audio signals throu

• Pioneer CX-3195, CX-3195 9 5 678 56 7 8 C D F A B E Fig.1.2.2 Timing chart for focus close operations 1.2.2 Tracking servo system The main equalizer of the tracking servo consists of the digital equalizer block. The figure 1.2.3 shows the block diagram of the tracking servo system. Fig.1.2.3 Block diagram of the tracking servo system E F LENS 132 131 PWM TD 110 2 13 14 TOP TOM IC301 BA5839FP IC201 PE5547A TE AMP A/D DIG. EQ JUMP PARAMETERS CONTROL FE controlling signals FSS bit of SRVSTS1 resistor RFOK signals Output from FD terminal A blind period Search start You can ignore this for blind periods. The broken l

• Pioneer CX-3195, CX-3195 10 1234 1234 C D F A B E (a) The track jump operation is automatically performed by the auto-sequence function inside the LSI with a command from the CPU of the LSI. For the track jumps used in the search mode, a single track jump and four to 100 multi-track jump are available in this system. In the test mode, out of these track jumps, 1, 32, and 32 * 3 track jumps, as well as carriage move can be performed and checked in mode selection. In a track jump, the CPU of the LSI sets about half the number of the total tracks to jump (about five tracks for a 10-track jump), and the set number of tracks are counted using

• CX-3195 11 5 678 56 7 8 C D F A B E Fig.1.2.5 Multi-track jump Fig.1.2.6 Track brake t1 TD TEC (10 TRACK) EQUALIZER T. BRAKE SERVO SD 2.9mS (4.10 TRACK JUMP) 5.8mS (32 TRACK JUMP) GAIN UP NORMAL ON OFF OPEN CLOSED t2 t TEC TZC (TEC "SQUARED UP" ) (INTERNAL SIGNAL ) MIRR MIRR LATCHED AT TZC EDGES = SWITCHING PULSE EQUALIZER OUTPUT (SWITCHED) DRIVE DIRECTION Note : Equal

• CX-3195 12 1234 1234 C D F A B E 1.2.3 Carriage servo system The carriage servo system inputs the output of the low frequency component from the tracking equalizer (information on the lens position) to the carriage equalizer, and, after the gain is increased to a certain level, outputs the drive signal from the CD of the LSI. This signal is applied to the carriage motor via the driver IC. Spec

• CX-3195 13 5 678 56 7 8 C D F A B E 1.2.4 Spindle servo system In the spindle servo system, the following modes are available: 1) Kick Used to accelerate the disc rotation in the setup mode. 2) Offset a. Used in the setup mode after the kick mode, until the TBAL adjustment is completed. b. Used during the play mode when the focus loop is unlocked, until it is locked again. In

• Pioneer CX-3195, CX-3195 14 1234 1234 C D F A B E In this system, all the circuit adjustments are automated inside the CD of the LSI. All adjustments are performed whenever a disc is inserted or the CD mode is selected by pressing the source key. Details of each adjustment will be explained below. 1.3.1 TE, FE, and RF offset auto-adjustment In this adjustment the TE, FE, and RF amplifier offsets of the preamplifier block in POWER ON are adjusted to the respective target values with the REFO as reference. (The target values for TE, FE, and RF offsets are 0 V, 0 V, and - 0.8 V, respectively.) Adjusting procedure 1) The CPU of the LSI reads respective offsets through t

• Pioneer CX-3195, CX-3195 15 5 678 56 7 8 C D F A B E 1.3.4 Focus and tracking AGC This adjustment is to automatically adjust the focus and tracking servo loop gains. Adjusting procedure 1) Introduce disturbance to the servo loop. 2) The error signals (FE and TE) when disturbance is introduced are extracted through the band pass filter, to obtain the G1 and G2 signals. 3) The CPU of the LSI reads the G1 and G2 signals through the CD of the LSI. 4) The CPU of the LSI calculates the necessary correction and performs the loop gain adjustment ins

• Pioneer CX-3195, CX-3195 16 1234 1234 C D F A B E 1.3.8 Coefficient display of adjustment results For some of the adjustments (FE and RF offset, FZD cancel, F and T gains, and RFAGC), the adjustment results can be displayed and confirmed in the test mode. The coefficient display in each auto adjustment is as follows: 1) FE and RF offset Reference value = 32 (coefficient of 32 indicates that no adjustment is required) The value is displayed in the unit of approximately 32 mV. Ex. When the FE offset coefficient is 35, 35 - 32 = 3 x 32 mV = 96 mV The corr

• Pioneer CX-3195, CX-3195 17 5 678 56 7 8 C D F A B E For the power supply for this system, the VD (7.5 ± 0.5 V) and the VDD (3.3 ± 0.165 V), which are supplied from the motherboard, are used. The two power supplies, the VD mentioned above (for the drive system), and the VDD (for the LSI: 3.3 V), are used in this system. The CPU of the LSI controls ON/OFF with "CONT", except for Load/Eject of the CD driver. For ON/OFF of the Loading drive, no particular control terminals are available, but the input signal "LOEJ" assumes an equivalent role. Also, the LCO output switches LOADING MODE and CARRIAGE MODE with "CLCONT". Fig.1.4.1 Power supply/loading system circuit bl

• Pioneer CX-3195, CX-3195 18 1234 1234 C D F A B E The load/eject operation is controlled with the status changes of the HOME switch (also used for clamp detection) on the mechanism unit and the three switches on the control unit. The ON/OFF statuses of these switches are respectively detected at the input port of the microcomputer. Using the detection results in the microcomputer, each status (A to E) is determined. The disc size detection (8 or 12 cm) is also performed through this status change. Each status is shown in Fig.1.4.3 and the status change in Fig.1.4.4. Fig.1.4.3 DSCSNS status Status A B C D E DSCSNS SW1(S903) OFF ON ON ON ON 8SW SW2(S905) ON

• CX-3195 19 5 678 56 7 8 C D F A B E Fig.1.4.4 Status change in LOAD and EJECT modes Dead zone STOP 12EJ 8EJ DSCSNS HOME CLCONT LOEJ MOTOR STOP EJECT STOP MOTOR EJECT STOP 12EJ 8EJ DSCSNS HOME CLCONT LOEJ EJECT 12 cm 8 cm SW CHANGESSW CHANGES CONTROLCONTROL

• Pioneer CX-3195, CX-3195 20 1234 1234 C D F A B E 2. MECHANISM DESCRIPTIONS Centering Pin 8cm-Disc Guide Pin Centering Pin 12cm-Disc Guide Pin Guide Pin Centering Pin DISC Load Carriage Motor Pickup Unit SW3 SW2 SW1 SW Arm L SW Arm R Rubber Roller - Loading actions 1. When a disc is inserted, SW Arm L and R rotate and SW1 is switched from ON to OFF. When SW1 is switched from ON to OFF, the Load Carriage Motor is started and the rubber roller rotates. 2. If the disc is a 12cm-disc, SW3 is turned ON with SW Arm, and the microcomputer determines that the disc is a 12cm-disc. 3. In case of an 8cm-disc, SW3 is not turned ON, a clamp action is

• Pioneer CX-3195, CX-3195 21 5 678 56 7 8 C D F A B E 2 3 4 5 6 7 8 Loading Rack Gear Lock Arm 2-Stage Gear Roller Up Arm Planet Gear Clamp Lever Mech Lock Lever Feed Screw's Gear 1 1 Mech Lock Arm Detection Arm Clamp Arm Rubber Roller - Clamp actions mechanism 1. With an 8 or 12cm-disc centered on the spindle, the Detection Arm is moved. 2. The movement of the Detection Arm engages the Loading Rack with the 2-Stage Gear. 3. The Clamp Lever slides and lowers the Clamp Arm (the disc is clamped). At the same time, the Roller Up Arm is rotated, and the Rubber Roller is s

• CX-3195 22 1234 1234 C D F A B E 3. DISASSEMBLY A A B B Upper Frame Lower Frame B B B B a Damper Carriage Mechanism Damper Do not squeeze this area. - How to hold the Mechanism Unit - Removing the Upper and Lower Frames 1. With a disc inserted and clamped in the mechanism, remove the two Springs (A), the six Springs (B), and the four Screws. 2. Turn the Upper

• Pioneer CX-3195, CX-3195 23 5 678 56 7 8 C D F A B E Spring Spring 1 3 2 Guide Arm Assy Bevel Gear Bracket 1 - Removing the Guide Arm Assy 1. Remove the Upper and Lower Frames and set the mechanism to the eject mode. 2. Remove the two Screws and Bevel Gear Bracket. (Note that the gears will come off.) 3. Remove the two Springs from the left and right sides. 4. Slide the Guide Arm Assy to the left, and turn it upward. 5. When it is turned about 45 degrees, slide it to the right and remove. Caution: When assembling, assemb

• Pioneer CX-3195, CX-3195 24 1234 1234 C D F A B E Spring Spring Roller Arm Assy Screw Shorting Solder CD Core Unit Solder - How to remove the CD Core Unit - How to remove the Roller Arm Assy 1. Apply Shorting Solder to the flexible cable of the Pickup, and disconnect it from the connector. 2. Unsolder the four leads, and loosen the Screw. 3. Remove the CD Core Unit. Caution: When assembling the CD Core Unit, assemble it with the SW in a clamped state so as not to damage it. 1. Remove the Guide Arm Assy. 2. Remove the CD Core Unit. (If the Spring can be removed, the unit need not be removed, depending on the type of CD Core Unit.)

• Pioneer CX-3195, CX-3195 25 5 678 56 7 8 C D F A B E Chassis Pickup Rack Pickup Poly Washer Change Arm Pickup Lock Arm Feed Screw Planet Gear Inner Holder - How to remove the Pickup Unit 1. Make the system in the carriage mechanism mode, and have it clamped. 2. Remove the CD Core Unit and remove the leads from the Inner Holder. 3. Remove the Poly Washer, Change Arm, and Pickup Lock Arm. 4. While releasing from the hook of the Inner Holder, lift the end of the Feed Screw. Caution: When assembling, move the Planet Gear to the load/eject po

• Pioneer CX-3195, CX-3195 26 1234 1234 C D F A B E Change Arm Poly Washer Pickup Lock Arm Screw A Bevel Gear Bracket Screw B Gear Bracket 1 Screw C Load Carriage Motor Assy - How to remove the Load Carriage Motor Assy 1. Make the system in the carriage mechanism mode, and have it clamped. 2. Release the leads (orange and purple) of Load Carriage Motor Assy from the CD Core Unit and remove the holder. 3. Remove the Poly Washer, Change Arm, and Pickup Lock Arm. 4. Remove the two Screws (A) and the Bevel Gear Bracket (Note that the gears will come off). 5. Remove the two Screws (B) and the Gear Bracket (remove the CD Core Unit, if necessary), and rem

• Pioneer CX-3195, CX-3195 27 5 678 56 7 8 C D F A B E Spring Spring Spring A Clamp Arm Assy Detection Pin place the boss in the cam Detection Pin Spindle Motor Assy Screw - How to remove the Clamp Arm Assy 1. Make the system in the carriage mechanism mode, and set the mechanism to the eject mode. 2. Remove the three Springs. 3. While pressing the position A, turn the Clamp Arm Assy upward, slide it to the left, and remove. Caution: When assembling, place the boss of the Detection Pin in the cam unit of the Loading Rack. - How to remove the Spindle Motor Assy 1.Make the system in the carriage mechanism mode, and have it

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