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Sharp GX-CD555Z Service Manual
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Sharp GX-CD555Z Service Manual

Sharp GX-CD555Z Service Manual

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SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NAMES OF PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVING AND REINSTALLING THE MAIN PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
VOLTAGE SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOTES ON SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD . . . . . . . . . . . . . . . . . . . . . .21-32
TROUBLESHOOTING (CD SECTION) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-36
FUNCTION TABLE OF IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR . . . . . . . . . . . . . . . . . . . . . . . . . .52
In the interests of user-safety the set should be restored to its original
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condition and only parts identical to those specified be used.
INDEX TO CONTENTS
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  • Page 1 In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used. f - l INDEX TO CONTENTS Page SPECIFICATIONS ............NAMES OF PARTS .
  • Page 2 FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. A C llO-1271220-240 V, 50/60 Hz Power source: Disc: Compact disc DC 12 V [“ D” size (UMISUM-1, Signal readout: Non-contact, 3-beam semi- conductor laser pickup Power consumption: Audio channels: PMPO;...

  • Page 3: Names Of Parts

    NAMES OF PART-S Play indicator: k Pause Indicator: Repeat indicator: c CD Compartment CD Eject Button: r Clear Button Memory Button Stop Button: H Play/Repeat Button: ) c Track Up/Cue Button: PWP+ Track Down/Review Button: WI+ FM Stereo Indicator Fine Tuning Control Band Selector Switch...
  • Page 4 1. Dubbing Speed Switch TAPE 2 Rewind Button: + TAPE 1 Reverse Mode Switch: IS,J/,=J Play Button: 4) Fast Wind Buttons: WI++ Stop/Eject Button: W/A FM/SW Telescopic Rod Aerial Speaker Release Lever Beat Cancel Switch Headphones Socket Battery Compartment Tweeter Woofer Bass Reflex Port Speaker Wire...

  • Page 5: Main Unit

    DISASSEMBLY Follow the below-mentioned notes when disassembling the unit and reassembling it, to keep its safety and excellent performance: 2. Be sure to remove the power supply plug from the wall Cabinet outlet before starting to disassemble the unit and remove the batteries from the unit.
  • Page 6 LCD PWB (H2) x 1...

  • Page 7: Removing And Reinstalling The Main Parts

    REMOVING AND REINSTALLING THE MAIN PARTS Perform steps 1,2,3 and 4 of the disassembly method to remove the tape mechanism. How to remove the record/playback and erase heads(TAPE2) (See Fig. 7-l*) 2. Remove the 2 screws (A2) to remove the record/playback head.

  • Page 8: Tape Section

    ADJUSTMENT As for adjusting method referto the relevant explanation in Ser- vice Manual “ ADJUSTMENT PROCEDURES OF AUDIO PRO- Position of each switch or control DUCTS” . Driving Force Check Specified Value Torque Meter Play: TW-2412 Over 50 g Reverse play: TW-2422 Over 60 g Specified Value Beat cancel...

  • Page 9: Cd Mechanism Section

    Perform steps 1,2,8,9, and 10 of the disassembly method to remove the CD mechanism. Removing the optical pickup(See Fig. 9-1.) 2. Remove 4 screws (A3) and remove 2 shafts (A4). VOLTAGE SELECTION Before operating the unit on mains, check the preset voltage. If the voltage is different from your local voltage, adjust the voltage as follows: Slide the AC power supply socket cover by slightly loosing the screw to the visble indication of the side of your local...
  • Page 10 Motor How to remove the belt (See Fig. 8-l .) 1) from the motor side. 2. Remove the FF/REW belt(E2). 1) from the motor side. 3. Remove the tape 1 main belt (F Flywheel How to remove the flywheel (TAPE2) (See Fig.

  • Page 11: Tuner Section

    AM IF/RF Test Stage Specified instrument Value/Adjusting Connection Point Point F M IF/RF IF IF Input: Antenna Input: Antenna Output: Pin 5 of IC2 Output: Pin 5 of IC2 Input: Antenna Input: Antenna Output: Pin 9 of IC2 Output: Pin 9 of IC2 1,400 kHz: TC7 2.6 MHz: LB(SW1) 6.0 MHz: TC3...
  • Page 12 Stick black tape on the disc (1.2 A disc other than the test disc can be used. Do not put the black tape on the initialized section (TOC).
  • Page 13 Servo Unit Since the adjusting procedure differs from that described in “ ADJUSTMENT PROCEDURES OF AUDIO PRODUCTS[IT]“ , refer to the Service Manual. All the semivariable resistors must be set in the mechanical center position. Set TEST MODE 0, and move the pickup to the center Set Test MODE 1 (make sure that the laser lamp lights) Alter loading a disc, set to TEST MODE 2.
  • Page 14 As for preparation for adjustment, adjustment method and optical pickup replacement method refer to the Service Manual “ ADJUSTMENT PROCEDURES OF AUDIO PRODUCTS [II]“ . 1 .Preparation for Adjustment Be sure to refer to the Service Manual “ ADJUSTMENT PROCEDURES OF AUDIO PRODUCTS [II]“ . Pressing simultaneously the All the segments light for 1.5 “...

  • Page 15: Notes On Schematic Diagram

    NOTES ON SCHEMATIC DIAGRAM Resistor: To differentiate the units of resistors, such symbol as K and Marking except for ( 2. CD ohm-type resistor. Besides, the one with “ Fusible” is a fuse Marking except for ( Capacitor: 3. Audio To indicate the unit of capacitor, a symbol P is used: this sym- bol P means micro-micro-farad and the unit of the capacitor Marking except for (...
  • Page 16 Waveforms of CD circuit 0. 2V/lOrrSiDCl d i f f e r e n c e OV- ( W h e n p l a y i n g b a c k t h e dlsc) ( W h e n b a c k t h e disc1 P o t e n t i a l d i f f e r e n c e OV-...
  • Page 17 PICKUP UNIT]...
  • Page 18 D / A C O N V E R T E R...
  • Page 19 A M I F F M I F R O D A N T E N N A BAND S E L E C T O R RF *MP. I F R O N T END1 B A N D S E L E C T O R T U N E R F R O M...
  • Page 20 F M DET FM MONO P O W E R A M P VOLUME L I N E AMP. M U T I N G B A 5 4 1 2 H E A D P H O N E S WOOFER C T I O N R I P P L E...
  • Page 21 P I C K U P UNITIJIO) F L E X I B L E P W B (311 1 P 2 9 4 - D CD SERVO P 2 5 3 - E Figure 21 W IRING SlDl...
  • Page 22 SPIN MOTOR C D S E R V O PWB-C ( B O T T O M SIDE) I The numbers 0 to @ are waveform numbers shown in page 16.
  • Page 23 NOTES ON SCHEMATIC DIAGRAM can be found on page 15. Figure 23 SCHEMATIC DI - 2 3 - - - - -,...
  • Page 24 The numbers @ to @ are waveform numbers shown in page 16.
  • Page 26 POWER NORMAL- HGH - 2 6 -...
  • Page 27 NOTES ON SCHEMATIC DIAGRAM can be found on oaue 15. Figure 27 SCHEMATIC DIA( - 2 7 -...
  • Page 29 Figure 29 WlRll...

  • Page 31: Fm Front End

    1 l%K ANT. FM FRONT END BAND a. 6 4 . 7p NOTES ON SCHEMATIC DIAGRAM can be found on page 15. Figure”31 SCHEM...
  • Page 32 F M / A M B A N D F M M P X P F 2 LPF! P27 2-D , L-CH AUDIO SECTION - 3 2 -...

  • Page 33: Troubleshooting (Cd Section)

    TROUBLESHOOTING (CD SECTION) When the does not function When the CD section does not operate When the objective lens of the optical pickup is dirty, this section may not operate. Clean the objective lens, and check the playback operation. When this section does not operate even after the above step is taken, check the following items.
  • Page 34 Check the LCD PWB of CD. (Check the LD ON terminal of pin 9 of IC951.) Is pin 17 of CNPQ51 Check the +5 V line of pin 1 of CNP881. Is there a high level (+5V) between pin 17 of CNP951 and R749 ? 17 of CNP951 and R749.
  • Page 35 is the spin motor running? mode 3, does voltage generate between pins 11 and lb of IC720 for 0 . 3 - 1.5sec Yes. (Runs at extremely approximately 0.3 - 1.5 seconds? high speed) When test mode 2 is switched to test mode 3, is pin 3(PWM2) of IC780 at a defective.
  • Page 36 Does the slide motor run in the test mode using the Check the item of “ The slide motor does not run” . UP/DOWN button? During normal playback track searching, is the following Check the connection of C750, etc. waveform being input to pin 4(TCIN) of IC750? (TSOUT) of IC750 during track searching.

  • Page 37: Function Table Of Ic

    FUNCTION TABLE OF IC Pin No. Terminal Function output Name LCD segment output Output SCOR Sub-code Q data frame sync input LD ON Laser diode control SYCLK Frame cycle status CNTR Data input from servo IC Input SUBQ Sub-code Q data input input Jump control signal Output...
  • Page 38 Pin No. Terminal Name 1 Function 4’ DOTX ACRCY Selection of number of output data bits 18 bits = “ 1” DAC interface selection input 1 Input DAB interface selection input 2 DAC interface selection input 3 Sync. = “ 1” VDD2 Input Analog section exclusive-use power supply 5 V...
  • Page 39 Terminal Name Function Pin No. SBCP 42’ Row address strobe signal output External memory address output 0 Output Error state output 2 EST2 Output Error state output 1 Cl decoder error detection = “ 1” Cl decoder error detection = “ 1” Power supply +5 V Power supply +5 V Input...
  • Page 40 Function Terminal Name Input Bit clock input Input Word select input Input Data input , ETA Ground Input output Not connected output Right channel output...

  • Page 41: Tape Mechanism Exploded View

    Figure TAPE MECHANISM EXPLODED VIEW - 4 1 -...
  • Page 42 Figure 42 CD MECHANISM EXPLODED VIEW...
  • Page 43 Figure 43 EXPLODED VIEW (l/2)
  • Page 44 2 5 3 Figure 44 CABINET EXPLODED VIEW (2/2)

  • Page 45: Replacement Parts List

    REPLACEMENT PARTS LIST “HOW TO ORDER REPLACEMENT PARTS” To have your order filled promptly and correctly, please furnish the following information. 1 . M O D E L N U M B E R 2 . R E F . N O . 3.
  • Page 46 PART NO. DESCRIPTION CODE PART NO. DESCRIPTION CODE 5 kohms (B),Semi-VR VR700 [Focus Offset] VR710 [Tracking Offset] [Tracking Gain] [Focus Gain] VARIABLE CAPACITORS VIBRATORS X780 x951 CAPACITORS There are two types of capacitors available and they can be identified from eact other by reading their Part Numbers.
  • Page 47 PART DESCRIPTION CODE PART DESCRIPTION CODE RESISTORS (Unless otherwise specified, resistors are f5%,carbon type.) (Tubular type carbon film resistor ?5% is identified the symbol TV(TQ/CY) of the part (Tubular type carbon film resistor t5% IS Identified the symbol MF(MN)ofthe part NO. VRD-MF(MN)0000000; this MF(MN) does not mean lead wire.) ivory c755 c757...
  • Page 48 PART NO. DESCRIPTION CODE PART NO. DESCRIPTION CODE R730 R742 R744 R747 R749 R750 R751 R752 R753 R340 R754 R341 R755 R401 R756 R402 R757 R403 R404 R759 R405 R760 R407 R409 R762 R410 R763 R764 R415 R765 R416 R766 R767 R768 R420...
  • Page 49 PART NO. DESCRIPTION CODE PART DESCRIPTION CODE OTHER CIRCUITRY PARTS SW961 CLOSE] TP751 DECK MECHANISM PARTS CNP202 CNP652 CNP881 T r a p 94819211461 T r a p CNS951 CNS971 J451 LCD951 RALMBO 10 IAFZZ SW203 Mode/Type Selector] SW251 CANCEL] SW401 SW402 Main]...
  • Page 50 PART NO. DESCRIPTION CODE PART NO. DESCRIPTION CODE Button Lever Main] SW402 Main] Direction] CD MECHANISM PARTS CABINET PARTS Front Cabinet(Not Replacement Item)

  • Page 51: Accessories/Packing Parts

    PART NO. CODE DESCRIPTION PART NO. DESCRIPTION CODE [Tape 21 [Tape 11 [ T a p e 2 1 Cassette Holder [Tape 11 (Not Replacement Item) [Tape 11 [Tape 11 [ T a p e 11 Cover [Tape 11 9 2 LMEC 16 8 5CTS2 J Cassette Holder Ass’ y [Tape 21 Cassette Holder Ass’...

  • Page 52: Ac Power Supply Cord And Ac Plug Adaptor

    B o t t o m PWB-Al-5 Volume/ Battery, For Australia only (Combined Ass’ y) (Combined Ass’ y) AC POWER SUPPLY CORD AND AC PLUG ADAPTOR Printed in Japan Writer and Editor: Quality & Reliability Control Center of Communication & Audio Systems Group, Sharp Corp.

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