Sharp QT-CD250 Manual de Serviço

QT-CD250CONTENTSPageIMPORTANT SERVICE NOTEST (FOR U.S.A. ONLY) ...

QT-CD250– 10 –D. VOLUME TEST MODESet the function switch to "POWER ON (TAPE PLAY, TUNER or CD)" when pressing the "REVIEW(PRESET DOWN

QT-CD250– 11 –NOTES ON SCHEMATIC DIAGRAM 1. Tuner( ): AM modeMarking except for ( ): FM mode2. CD( ): Play modeMarking except for ( ): Stop state

QT-CD250– 12 –ABCDEFGH1234 56• The numbers 1 to 17 are waveform numbers shown in page 16.Figure 12 SCHEMATIC DIAGRAM (1/2)COR1C856100PC29 100PR86

QT-CD250– 13 –Figure 13 SCHEMATIC DIAGRAM (2/2)78 9101112• NOTES ON SCHEMATIC DIAGRAM can be found on page 11.+BC3020.022C8720.0047 L8070.82µHC249100P

QT-CD250– 14 –Figure 14 WIRING OF P.W.BOARD (1/2)ABCDEFGH1234 56• The numbers 1 to 17 are waveform numbers shown in page 16.2345178961213141511101

QT-CD250– 15 –Figure 15 WIRING OF P.W.BOARD (2/2)78 9101112F3895AFC651C654D651D654C653D652D653C652(241)(241)(241)CNS602FM ROD ANTENNA(237)BKBKRDWHRECO

QT-CD250– 16 –WAVEFORMS OF CD CIRCUITNO DISC FOCUS SEARCH STOP PLAYFOO1 TMAX 1 FO+ 2SBOK2FO- 3 DMO 3FOCUS SEARCH TOC IL STOP PLAYSEL 1 TEI 1

QT-CD250– 17 –TROUBLESHOOTING (CD SECTION)HOW TO USE1. Using the brush in the cleaner cap, apply 1 or 2 drops of the cleaning fluid to the brush on th

QT-CD250– 18 –• Laser failure.YesNoCheck the laser come on when pattern cut between pin 8 (SEL) ofIC801 and pin 74 (SEL) of IC802.YesNoCheck the perip

QT-CD250– 19 –• Focus servo sawtooth wave failure.Is +7.5V applied to the pins 1 and 30 (VCC) of IC803 ? Is sawtooh wave output to the pin 66 (FOO) of

QT-CD250– 2 –FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFERTO THE OPERATION MANUAL.BEFORE RETURNING THE AUDIO PRODUCT(Fire &am

QT-CD250– 20 –• Sled motor operation failure.YesYesIs following sled feed signal output the pin 71 (FMO) of IC802when FF/REW key is pressed after the

QT-CD250– 21 –IC51 VHiLC72121/-1: Electronic Tuning (LC72121) (1/2)1 Xtal XIN Output Crystal oscillator connection.(4.5 MHz/7.2 MHz)2 Ground VSSX Outp

QT-CD250– 22 –IC51 VHiLC72121/-1: Electronic Tuning (LC72121) (2/2)15 Local oscillation, Signal input AMIN Input Serial data input: AMIN is selected w

QT-CD250– 23 –IC1 VHiTA2104BN-1: FM /AM IF MPX. (TA2104BN)Figure 23 BLOCK DIAGRAM OF ICIC202 VHiTC9260P/-1: Electronic Volume (TC9260P)2 3 4 51 7 8 96

QT-CD250– 24 –IC802 VHiTC9457F2-1: Servo/Signal Control (TC9457F2) (1/4)1* (OT5)S1 SEG1 Output Segment signal output to the LCD panel.2 (OT6)S2 SEG2 O

QT-CD250– 25 –IC802 VHiTC9457F2-1: Servo/Signal Control (TC9457F2) (2/4)30 (S12)P4-1 DI Input 3-bit CMOS I/O ports.31* (SO/S11/ DO Output DI: Tuner Da

QT-CD250– 26 –IC802 VHiTC9457F2-1: Servo/Signal Control (TC9457F2) (3/4)63 SBAD SBAD Input/Output Subbeam add signal input pin.64 TEI TEI Input/Output

QT-CD250– 27 –IC802 VHiTC9457F2-1: Servo/Signal Control (TC9457F2) (4/4)91 /HOLD HOLD Input This pin is used to input a signal that requests or clears

QT-CD250– 28 –— M E M O —

QT-CD250PARTS GUIDENOTE:Parts marked with “ ” are important for maintaining the safety of the set.Be sure to replace parts with specified ones for mai

QT-CD250– 3 –NAMES OF PARTSREMOTE CONTROL 1515Notes:● Replace the batteries if the operating distance isreduced or if the operation becomes erratic.●

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONQT-CD250– 1 –INTEGRATED CIRCUITSIC1 VHITA2104BN-1 J AQ FM/AM IF MPX.,TA2104BNIC51

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONQT-CD250– 2 –C243,244 VCKYPA1HB331K J AA 330 pF,50VC245 RC-GZA105AF1H J AB 1 µF,50V

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONQT-CD250– 3 –R850 VRD-ST2CD152J J AA 1.5 kohms,1/6WR851~853 VRD-ST2CD222J J AA 2.2

NO. PARTS CODEPRICERANKDESCRIPTIONQT-CD250– 4 –ACCESSORIES! QACCU0001SJ00 J AR AC Power Supply CordTINSE0040SJZZ J AC Operation ManualTLABZ SJZZ

QT-CD250ABCDEFGH123456Figure 5 CD MECHANISM EXPLODED VIEW– 5 –701304 701302301702303M702703x2305x2SW702M701305PWB-B704306

QT-CD250ABCDEFGH123456Figure 6 CABINET EXPLODED VIEW– 6 –Note: Only the unit and consumale parts are supplied as parts supply for the Tape mechanism.C

QT-CD250PACKING OF THE SET (FOR U.S.A ONLY)• Setting position of switches and knobsTape Mechanism Control STOP STATEFUNCTION SELECTOR OFF/TAPE: Not Re

QT-CD250– 4 –5461321Preparation for use / Preparación para su uso AC power Funccionamiento con corriente alterna Battery power Funccionamiento con p

QT-CD250– 5 –1 Top Cabinet/ 1. Screw ... (A1) x7 5-1Front Cabinet 2. Socket ... (A2) x13. Screw ... (A3

QT-CD250– 6 –TAPE MECHANISM SECTIONPerform steps 1 to 6 of the disassembly method to remove thetape mechanism. (See page 5.)How to remove the record /

QT-CD250– 7 –MECHANISM SECTION• Driving Force CheckPLAY: TW-2412 Over 120 gTorque MeterSpecified Value• Torque CheckTorque MeterSpecified ValuePlay: T

QT-CD250– 8 –A. CD TEST MODESet the function switch to "CD" when pressing the "REVIEW(PRESET DOWN )" button together with "ST

QT-CD250– 9 –B. TUNER TEST MODESet the function switch to "TUNER" when pressing the "REVIEW(PRESET DOWN )" button together with &q