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Pioneer CX-3166 Service Manual
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Pioneer CX-3166 Service Manual

Pioneer CX-3166 Service Manual

Cd mechanism module s10.5std
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CD MECHANISM MODULE(S10.5STD)
CX-3166
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
DEH-1850/XN/ES
DEH-1800R/XN/EW
DEH-1820R/XN/EW
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
CRT3552
CRT3553
4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
CD Mechanism Module
CXK5701
CXK5701
K-ZZA. OCT. 2005 Printed in Japan
ORDER NO.
CRT3582

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Summary of Contents for Pioneer CX-3166

  • 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-ZZA.
  • Page 2 CONTENTS 1. CIRCUIT DESCRIPTIONS ..........................3 2. MECHANISM DESCRIPTIONS........................20 3. DISASSEMBLY ............................... 22 CX-3166...

  • Page 3: Circuit Descriptions

    PE5497B, used in this product, is an LSI integrating the afore-mentioned LSI unit and microcomputer unit in one chip. A-F Signal PE5497B Data Processor RF-Amp Converter 1-bit Audio Digital Sub-Q, Servo Output CD-TEXT Post filter (SCF) CPU Interface CPU for System Control Analog Output Fig.1.0.1 Block diagram of PE5497B CX-3166...
  • Page 4 APC circuit. The LD current is obtained by measuring the voltage between LD1 and VDD(+ 3.3 V), and divide the value by 7.5 (ohms), which becomes about 30 mA. CD CORE UNIT Pickup Unit REG 1.25V 6.5k VDD(+ 3.3 V) 6.5k Vref 100k 110k 100k PE5497B Fig.1.1.1 APC CX-3166...
  • Page 5 This RFO signal is also used for the EFM, DFCT, MIRR, and RFAGC auto-adjustment circuits. CD CORE UNIT PE5497B 4.7k RF2- 1.2k 1.2k 5.6k 7.05k 15.2k AGCO 15.2k 11.2k To DEFECT/A3T detection RFOFF setup For RFOK generation Pickup Unit VREF 61.0k 8.8k VREF 111k FE A/D 61.0k FEOFF setup 8.8k VREF Fig.1.1.2 RF/AGC/FE CX-3166...
  • Page 6 For the TE output, TE waveform of about 1.3 Vp-p with the REFO as the reference. The cutoff frequency in the subsequent is 21.1 kHz. PE5497B CD CORE UNIT TE A/D TEOFF setup Pickup Unit 160k 45.36k 161k 112k VREF 45.36k 10000p 160k 160k 112k VREF Inside TEC Fig.1.1.3 TE CX-3166...
  • Page 7 RFO signal. This reference voltage ASY is generated by passing the EFM comparator output through the low-pass filter. The EFM signal is output from the pin 73. PE5497B EFM signal 1.5k 7.5k Fig.1.1.4 EFM CX-3166...
  • Page 8 With the focus mode selector displaying 01 in the test mode, pressing the focus close button, allows to check the S- shaped curve, search voltage, and actual lens behavior. IC201 PE5497B IC301 BA5839FP A + C DIG. B + D LENS CONTROL FOCUS SEARCH TRIANGULAR WAVE GENERATOR Fig.1.2.1 Block diagram of the focus servo system CX-3166...
  • Page 9 The main equalizer of the tracking servo consists of the digital equalizer block. The figure 1.2.3 shows the block diagram of the focus servo system. IC201 PE5497B IC301 BA5839FP DIG. LENS CONTROL JUMP PARAMETERS Fig.1.2.3 Block diagram of the tracking servo system CX-3166...
  • Page 10 Additionally, the off-track direction is determined from the TEC and MIRR signals, as well as their phase relation. BRAKE KICK T. BRAKE GAIN UP EQUALIZER GAIN NORMAL NORMAL OPEN T. SERVO CLOSED Fig.1.2.4 Single-track jump CX-3166...
  • Page 11 (INNER TRACK TO OUTER) (TEC "SQUARED UP" ) (INTERNAL SIGNAL ) MIRR MIRR LATCHED AT TZC EDGES SWITCHING PULSE EQUALIZER OUTPUT (SWITCHED) DRIVE DIRECTION REVERSE FORWARD Time Note : Equalizer output assumed to hava same phase as TEC. Fig.1.2.6 Track brake CX-3166...
  • Page 12 KICK, BRAKE CARRIAGE REGISTERS MOTOR Fig.1.2.7 Block diagram for the carriage servo block TRACKING DRIVE (LOW FREQUENCY) LENS POSITION DRIVE ON/OFF THRESHOLD CRG DRIVE (INSIDE UPD63711GC) CRG MOTOR VOLTAGE CARRIAGE MOVED AT THESE POINTS Fig.1.2.8 Waveforms of the carriage signal CX-3166...
  • Page 13 By obtaining the linear velocity from the EFM waveform, the "H" or "L" level is input to the spindle equalizer. In the test mode, this mode is also used for grating confirmation. IC201 PE5497B IC301 BA5839FP SPEED ERROR SIGNAL DIG. BLOCK SIGNAL SPINDLE MOTOR PHASE ERROR SIGNAL Fig.1.2.9 Block diagram of the spindle servo system CX-3166...
  • Page 14 5) The CPU unit of the LSI calculates the necessary correction and substitutes the result to the bias adjustment term inside the CD block of the LSI. Additionally, in this adjusting, a series of steps are repeated for better adjustment accuracy, the same as in the auto-gain control. CX-3166...
  • Page 15 1.3.7 Initial values in adjustment All automatic adjustments immediately after inserting a disc are performed based on the initial values. Automatic adjustments by source change or ACC ON are basically performed using the previous adjustment values as the initial values. CX-3166...
  • Page 16 When the coefficient changes by 1, the gain changes by 0.7 to 1 dB. When the coefficient is 15, the gain is the maximum at TYP + 7.9 dB. When the coefficient is 0, the gain is the minimum at TYP - 4.6 dB. CX-3166...
  • Page 17 LCO output switches LOADING MODE and CARRIAGE MODE with "CLCONT". CN702 LCOP PGND LOADING IC301 MOTOR BA5839FP LCOM CLCONT 40 41 IC201 PE5497B VDCONT 3.3VDD S903 S905 S904 Fig.1.4.1 Power supply/loading system circuit block CLCONT Loading Mode Carriage Mode Loading Mode Fig.1.4.2 Loading/carriage mode shift CX-3166...
  • Page 18 HOME SW4(S901) Mechanism state With no disc Clamp state Fig.1.4.3 DSCSNS status LOADING 12cm SW_ON 12EJ SW_OFF DSCSNS HOME CLCONT LOEJ MOTOR STOP LOAD STOP It changes Load/Carriage 12EJ DSCSNS HOME CLCONT LOEJ MOTOR STOP LOAD STOP Dead zone CX-3166...
  • Page 19 EJECT 12cm 12EJ DSCSNS HOME CLCONT LOEJ MOTOR STOP EJECT STOP 12EJ DSCSNS HOME CLCONT LOEJ MOTOR STOP EJECT STOP Dead zone Fig.1.4.4 Status change in LOAD and EJECT modes CX-3166...

  • Page 20: Mechanism Descriptions

    1. 8cm-disc is centered by the Guide Pins and the Centering Pins. 2. 12cm-disc passes under the Guide Pins and the Centering Pins, and centered in the back position of the mechanism. Centering Pin Centering Pin 8cm-Disc Guide Pin Guide Pin Centering Pin Guide Pin 12cm-Disc CX-3166...
  • Page 21 ON point, the eject action will start in the reverse order of the procedure mentioned earlier. 2. For a 12cm-disc, Eject is completed when SW3 is switched OFF, ON, and OFF again. 3. For an 8cm-disc, Eject is completed when SW2 is switched OFF, ON, and OFF again. CX-3166...
  • Page 22 Upper Frame. 3. While lifting the Carriage Mechanism, remove it from the three Dampers. Caution: When assembling, be sure to apply some alcohol to the Dampers and assemble the mechanism in a clamped state. Damper Damper Carriage Mechanism Lower Frame CX-3166...
  • Page 23 5. When it is turned about 45 degrees, slide it to the right and remove. Caution: When assembling, assemble with the Bevel Gear Bracket moved to the direction of the arrow ( Spring Guide Arm Assy Spring CX-3166...
  • Page 24 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.) 3. Remove the Spring. 4. Slide the Roller Arm Assy to the left. Spring Spring Roller Arm Assy CX-3166...
  • Page 25 Assemble the sub unit side of the Pickup, taking the plate (Chassis) in-between. When treating the leads of the Load Carriage Motor Assy, do not make them loose over the Feed Screw. Poly Washer Change Arm Pickup Lock Arm Inner Holder Feed Screw Planet Gear Pickup Rack Chassis Pickup CX-3166...
  • Page 26 Caution: When assembling the Load Carriage Motor Assy, move it to the direction shown in the illustration (1). When treating the leads of the Load Carriage Motor Assy, do not make them loose over the Feed Screw. Assy Load Carriage Motor Screw C CX-3166...
  • Page 27 3. Set the mechanism to the eject mode and remove the Clamp Arm Assy. 4. Set the mechanism to the clamped and move the Pickup to circumference. 5. Remove the two Screws, and remove the Spindle Screw Motor Assy. Spindle Motor Assy CX-3166...

This manual is also suitable for:

Deh-1850/xn/esDeh-1800r/xn/ewDeh-1820r/xn/ew