Sony CDX-848X Service Manual
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Sony CDX-848X Service Manual

Sony CDX-848X Service Manual

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Download this manual See also: Service Manual, Operating Instructions
QQ
3 7 63 1515 0
SERVICE MANUAL
Ver 1.1 2001.05
TE
L 13942296513
www
.
Sony Corporation
9-870-244-12
2001E0500-1
e Vehicle Company
C 2001.5
Shinagawa Tec Service Manual Production Group
http://www.xiaoyu163.com
System
Laser diode properties Material: GaAlAs
* This output is the value measured at a distance of 200 mm
from the objective lens surface on the Optical Pick-up Block.
Frequency response
Wow and flutter
Signal-to-noise ratio
Outputs
Current drain
Operating temperature –10°C to +55°C (14°F to 131°F)
Dimensions
Mass
Power requirement
Supplied accessories
Design and specifications are subject to change without
notice.
x
ao
u163
y
i
http://www.xiaoyu163.com
CDX-848X
2 9
8
Model Name Using Similar Mechanism NEW
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
Q Q
3
6 7
1 3
1 5
Compact disc digital audio system
Wavelength: 780 nm
Emission Duration: Continuous
Laser out-put Power: Less than
44.6 µW*
5 – 20,000 Hz
Below the measurable limit
102 dB
Optical digital output
BUS control output (8 pins)
Analog audio output (RCA pin)
800 mA (during CD playback)
800 mA (during loading or ejecting
a disc)
Approx. 262 × 90 × 186.5 mm
/8 × 3
/8 × 7
3
5
3
(10
/8 in.)
(w/h/d) not incl. projecting parts
and controls
Approx. 2.1 kg (4 lb. 10 oz.)
12 V DC car battery
(negative ground)
Disc magazine (1)
Parts for installation and
connections (1 set)
COMPACT DISC CHANGER
co
.
9 4
2 8
US Model
AEP Model
UK Model
MG-251B-137
KSS-720A
0 5
8
2 9
9 4
2 8
m
9 9
9 9

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  • Page 1: Te L 13942296513

    CDX-848X 3 7 63 1515 0 SERVICE MANUAL US Model AEP Model Ver 1.1 2001.05 UK Model Model Name Using Similar Mechanism NEW CD Drive Mechanism Type MG-251B-137 Optical Pick-up Name KSS-720A SPECIFICATIONS L 13942296513 System Compact disc digital audio system...

  • Page 2: Servicing Notes

    AND IN THE PARTS LIST ARE CRITICAL TO SAFE put a new CAUTION LABEL (3-223-913-11) to the chassis (U.S) OPERATION. REPLACE THESE COMPONENTS WITH sub assy. SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. http://www.xiaoyu163.com...

  • Page 3: Table Of Contents

    CDX-848X Ver 1.1 2001.05 3 7 63 1515 0 NOTE FOR REPLACING IC201 TABLE OF CONTENTS IC201 on MAIN board for this set has been changed in the mid- SERVICING NOTES way of manufacturing............2 In a set that the former type of IC201 is mounted, SUB board is connected to MAIN board (conductor side).

  • Page 4: General

    When using the Sony CD adapter, make sure the three catches on the adapter are firmly latched onto the 8 cm CD. • Do not insert the Sony CD adapter CSA-8 in the magazine without a disc, malfunction may result. Slide open...

  • Page 5: Installation

    CDX-848X 3 7 63 1515 0 Installation Installation Precautions Précautions • Choose the mounting location carefully, observing the following: • Choisir l’emplacement de montage en tenant compte des observations suivantes: — The unit is not subject to temperatures exceeding 55°C (131°F) (such as in a car parked in direct —...

  • Page 6: Connections

    — Protéger les pièces du coupleur des égratignures eet de la saleté. — If this unit is not connected to a car audio compatible with the Sony BUS optical digital transmission system, — Si cet appareil n’est pas raccordé à un autoradio compatible avec le système de transmission numérique optique u163 reinstall the protective cap to its original position.

  • Page 7: Disassembly

    CDX-848X SECTION 2 DISASSEMBLY 3 7 63 1515 0 • This set can be disassembled in the order shown below. 2-1. DISASSEMBLY FLOW Note 1: The process described in can be performed in any order. Note 2: Without completing the process described in , the next process can not be performed.

  • Page 8: Case (Upper T), Front Panel Assy

    CDX-848X 3 7 63 1515 0 Note: Follow the disassembly procedure in the numerical order given. 2-2. CASE (UPPER T), FRONT PANEL ASSY 3 screw (PTT2.6 × 6) 3 screw (PTT2.6 × 6) 4 lever (FLT) 5 case (upper T) 1 screw (PTT2.6 ×...

  • Page 9: Jack Board, Digital Out Board

    CDX-848X 3 7 63 1515 0 2-4. JACK BOARD, DIGITAL OUT BOARD 2 connector (CN902) 5 connector (CN701) Remove the jack board in the direction of the arrow. 1 ground point screw (PTT2.6 × 6) 3 jack board 6 digital out board 4 screw (BVTT2 ×...

  • Page 10: Elj Motor Assy (Elevator) (M104)

    CDX-848X 3 7 63 1515 0 2-6. ELJ MOTOR ASSY (ELEVATOR) (M104) 1 screw (PTT2 × 4) 2 bracket (EVM.S) 4 ELJ motor assy (elevator) (M104) 3 spacer (MO) L 13942296513 2-7. ESCUTCHEON (T) 3 two claws 2 Remove the claw in the direction of arrow A .

  • Page 11: Chassis (U.s) Sub Assy

    CDX-848X 3 7 63 1515 0 2-8. CHASSIS (U.S) SUB ASSY 2 Remove the edge in the direction 1 three screws of arrow A . (PTT2 × 4) 1 two screws (PTT2 × 4) 5 chassis (U.S) sub assy 1 screw (PTT2 ×...

  • Page 12: 2-10. Rf Board

    CDX-848X 3 7 63 1515 0 2-10. RF BOARD 3 two screws (PTT2 × 4) 4 RF board 3 two screws (PS2 × 4) 2 Remove four solders of the LSW board leads and spindle motor leads (M102). 2 Remove two solders...

  • Page 13: Lsw Board, Spindle Motor (S) Sub Assy (M102)

    CDX-848X 3 7 63 1515 0 2-12. LSW BOARD, SPINDLE MOTOR (S) SUB ASSY (M102) 8 two precision screws (P1.7 × 2.2) 3 spring (chucking) 6 retainer (disc) 1 precision screw (P2 × 2.5) 4 precision screw (P2 × 2.2)

  • Page 14: Assembly Flow

    CDX-848X SECTION 3 MECHANISM DECK ASSEMBLY 3 7 63 1515 0 • This set can be disassembled in the order shown below. 3-1. ASSEMBLY FLOW 3-2. OPTICAL PICK-UP COMPLETE ASSY (Page 14) 3-3. GEAR (LOMINI)/ (LOAD CAM) ASSY (Page 15) 3-4.

  • Page 15: Gear (Lomini)/(Load Cam) Assy

    CDX-848X 3 7 63 1515 0 3-3. GEAR (LOMINI)/(LOAD CAM) ASSY gear (LOAD 2) 2 Attach the gear (LOMINI) at the position shown in Fig. A. gear (LOMINI) shaft (rotary prevention C) chuck plate 1 Move the lever (LOCK 3A) fully in the direction of arrow B to move the chuck plate up.

  • Page 16: Mechanical Adjustment 1 3 1 5 0

    CDX-848X SECTION 4 3 7 63 1515 0 MECHANICAL ADJUSTMENT • Elevator Height (Address) Adjustment Adjustment Method: Note: This adjustments is necessary when the system controller (IC201), variable resistor (RV201), slider (R), slider (L), or chassis (ELV) 1. Connect this set to the master unit (e.g. MDX-C7970/C7970R), was replaced for any repair.

  • Page 17: Electrical Check

    CDX-848X SECTION 5 ELECTRICAL CHECK 3 7 63 1515 0 Note: Focus Bias Check 1. This check is performed with the set placed horizontally. 2. Power supply voltage: DC14.4 V (more than 3 A). Connection: 3. Be sure to use the disc “YEDS-18” parts code: 3-702-101-01, but only –...
  • Page 18 CDX-848X 3 7 63 1515 0 Tracking Offset Check Connection: – RF Board (Component Side) – oscilloscope (DC range) TP (VC) – IC101 TP (TE) Procedure: L 13942296513 1. Connect the oscilloscope to TP (TE) and TP (VC) on the RF board.

  • Page 19: Diagrams

    CDX-848X SECTION 6 3 7 6 3 1 5 1 5 0 DIAGRAMS 6-1. BLOCK DIAGRAM – SERVO Section – DIGITAL SIGNAL PROCESSOR, FILTER DIGITAL SERVO PROCESSOR, D-RAM CONTROLLER IC701 OPTICAL IC101 DIGITAL DOUT 66 69 68 67 15 85...

  • Page 20: Power Supply Section

    RESET SIGNAL CN901 (2/2) RESET GENERATOR IC303 CONTROL PS901 +3.3V B. UP +3.3V REGULATOR B. UP Q303, 304 BUS INTERFACE (FOR SONY BUS) IC302 DATA DATA UNI SI UNI SO UNI CK BUSON OUT BUSON BUSON BUSON OUT BUSON IN RESET...

  • Page 21: Note For Printed Wiring Boards And Schematic Diagrams

    CDX-848X 3 7 6 3 1 5 1 5 0 6-3. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS • Circuit Boards Location Note on Printed Wiring Board: Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF •...

  • Page 22: Printed Wiring Boards - Rf/Lsw Boards

    CDX-848X 6-4. PRINTED WIRING BOARDS – RF/LSW Boards – • See page 21 for Circuit Boards Location. 3 7 6 3 1 5 1 5 0 • Semiconductor Location Ref. No. Location IC101 IC201 Q101 Q102 M101 (SLED) M103...

  • Page 23: Schematic Diagram - Rf/Lsw Boards

    CDX-848X 6-5. SCHEMATIC DIAGRAM – RF/LSW Boards – • See page 30 for for Waveforms. • See page 30 for IC Block Diagrams. 3 7 6 3 1 5 1 5 0 1 3 9 4 2 2 9 6 5 1 3...

  • Page 24: Main Board (Component Side)

    CDX-848X 6-6. PRINTED WIRING BOARDS – MAIN Board (Component Side) – • See page 21 for Circuit Boards Location. Ver 1.1 2001.05 3 7 6 3 1 5 1 5 0 • Semiconductor Location Ref. No. Location D302 D303...

  • Page 25: Main (Conductor Side)/Switch Boards

    6-7. PRINTED WIRING BOARDS – MAIN (Conductor Side)/SWITCH Boards – • See page 21 for Circuit Boards Location. CDX-848X Ver 1.1 2001.05 3 7 6 3 1 5 1 5 0 • Semiconductor Location Ref. No. Location IC304 H-11...

  • Page 26: Schematic Diagram - Main Board (1/3)

    CDX-848X 6-8. SCHEMATIC DIAGRAM – MAIN Board (1/3) – • • See page 30 for Waveforms. See page 30 for IC Block Diagrams. 3 7 6 3 1 5 1 5 0 (Page 23) 1 3 9 4 2 2 9 6 5 1 3...

  • Page 27: Schematic Diagram - Main Board (2/3)

    CDX-848X Ver 1.1 2001.05 6-9. SCHEMATIC DIAGRAM – MAIN Board (2/3) – • • See page 30 for Waveform. See page 30 for IC Block Diagram. 3 7 6 3 1 5 1 5 0 (Page 26) BOARD (Page 26)

  • Page 28: Main (3/3)/Switch Boards

    CDX-848X Ver 1.1 2001.05 3 7 6 3 1 5 1 5 0 6-10. SCHEMATIC DIAGRAM – MAIN (3/3)/SWITCH Boards – • • See page 30 for Waveforms. See page 30 for IC Block Diagrams. (Page 1 3 9 4 2 2 9 6 5 1 3...

  • Page 29: Jack/Digital Out Boards

    (Page 28) CN701 R701 C701 (11) 1-679-418- 1 3 9 4 2 2 9 6 5 1 3 (11) 1-679-420- IC701 DIGITAL SW701 DIGITAL ANALOG ANALOG OUT 1-679-420- (11) CONTROL w w w (FOR SONY BUS) u 1 6 3 http://www.xiaoyu163.com...
  • Page 30 CDX-848X 3 7 6 3 1 5 1 5 0 • Waveforms • IC Block Diagrams – RF Board – – MAIN Board – –RF Board – 1 IC101 qh (FE) (CD play mode) 1 IC101 rd (MDP) (CD play mode)
  • Page 31 CDX-848X 3 7 63 1515 0 IC201 LA6576L-TE-L S-GND THERMAL SHUT DOWN CH2-4 INPUT MUTE2 MUTE VCC2 MUTE1 MUTE VLO– OUTPUT VIN4 CONTROL VLO+ VIN4– VO4+ VIN4+ LEVEL SHIFT VO4– VREF-IN VIN1/VREF VIN1 (VREF)-SW SWITCH VO3+ LEVEL VREF-OUT (CH1)
  • Page 32 CDX-848X 3 7 63 1515 0 IC101 CXD3027R 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 ERROR...
  • Page 33 CDX-848X 3 7 63 1515 0 IC203 BR24C16FJ-E2 IC301 LB1930M-TLM BUFFER START OUT1 MOTOR STOP CONTROL DRIVE LOGIC CIRCUIT SERIAL CIRCUIT OUT2 CONTROL H.V. PUMP/TIMING LOGIC BUFFER 8 VCC S-GND P-GND LOAD COMP DEVICE DATA RECOVERY ADDRESS COMPARATOR LOAD INC...

  • Page 34: 6-13. Ic Pin Function Description

    Serial data reading clock signal output to the CXD3027R (IC101) u163 SENS Internal status signal (sense signal) input from the CXD3027R (IC101) BUSON Bus on/off control signal input from the SONY bus interface (IC302) “H”: bus on Battery detection signal input “L”: battery on BUCHK http://www.xiaoyu163.com...
  • Page 35 70 to 74 Two-way data bus with the S-RAM Not used (open) RAMIO3 System reset signal input from the SONY bus interface (IC302) and reset signal generator (IC303) RESET “L”: reset For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”...
  • Page 36 CDX-848X 3 7 63 1515 0 Pin No. Pin Name Description Save end detect switch (SW2) input terminal SAVE SW “L”: When completion of the disc save operation Chucking end detect switch (SW1) input terminal LOAD SW “L”: When completion of the disc chucking operation...

  • Page 37: Exploded Views

    CDX-848X SECTION 7 EXPLODED VIEWS 3 7 63 1515 0 NOTE: • Items marked “*” are not stocked since they • -XX and -X mean standardized parts, so they The components identified by mark 0 or dotted line with mark may have some difference from the original are seldom required for routine service.

  • Page 38: Mechanism Deck Section-1 (Mg-251B-137)

    CDX-848X 3 7 63 1515 0 7-2. MECHANISM DECK SECTION-1 (MG-251B-137) L 13942296513 u163 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3378-091-1 CHASSIS (U. S) SUB ASSY 3-011-997-01 SPRING (STOPPER. LOWER) 3-024-161-01 SPRING (SUT)

  • Page 39: Mechanism Deck Section-2 (Mg-251B-137)

    CDX-848X 3 7 63 1515 0 7-3. MECHANISM DECK SECTION-2 (MG-251B-137) M104 L 13942296513 u163 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-024-170-01 SPRING (SB), TENSION * 154 3-014-685-01 SPACER (MO) * 152 3-040-790-01 BRACKET (EVM. S)

  • Page 40: Mechanism Deck Section-3 (Mg-251B-137)

    CDX-848X 3 7 63 1515 0 7-4. MECHANISM DECK SECTION-3 (MG-251B-137) L 13942296513 M103 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 201 3-024-150-01 RETAINER (CHM) 3-010-252-11 ROLLER (CRE) * 202 X-3378-080-1 BRACKET (CHM. D) ASSY...

  • Page 41: Mechanism Deck Section-4 (Mg-251B-137)

    CDX-848X 3 7 63 1515 0 7-5. MECHANISM DECK SECTION-4 (MG-251B-137) not supplied L 13942296513 M102 not supplied M101 not supplied The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.

  • Page 42: Electrical Parts List

    CDX-848X SECTION 8 DIGITAL OUT 3 7 63 1515 0 JACK ELECTRICAL PARTS LIST MAIN NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
  • Page 43 CDX-848X Ver 1.1 2001.05 3 7 63 1515 0 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C302 1-164-156-11 CERAMIC CHIP 0.1uF IC301 8-759-527-33 IC LB1930M-TLM C303 1-164-156-11 CERAMIC CHIP 0.1uF C304 1-164-156-11 CERAMIC CHIP 0.1uF...
  • Page 44 CDX-848X MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R404 1-216-833-11 METAL CHIP 1/16W < IC > R405 1-216-833-11 METAL CHIP 1/16W R406 1-216-833-11 METAL CHIP 1/16W IC101 8-752-089-74 IC CXA2581N-T4...
  • Page 45 CDX-848X 3 7 63 1515 0 SWITCH Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-679-419-11 SWITCH BOARD PARTS FOR INSTALLATION AND CONNECTIONS ************* ************************************** < SWITCH > 3-040-583-21 BRACKET (T) * 502 X-3369-824-1 SCREW ASSY SW801 1-692-431-21 SWITCH, TACTILE (Z) 1-790-455-21 CORD, CONNECTION (RCA PIN CORD 5.5m)
  • Page 46 CDX-848X 3 7 63 1515 0 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page.

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