Sharp QT-CD180(BL) Service Manual Download Page 8

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QT-CD180

– 8 –

MECHANISM SECTION

• Driving Force Check

PLAY: TW-2412

Over 80 g

Torque Meter

Specified Value

• Torque Check

Torque Meter

Specified Value

Play: TW-2111

30 to 60 g.cm

Fast Forward: TW-2231

55 to 140 g.cm

Rewind: TW-2231

55 to 140 g.cm

• Tape Speed

MTT-111 Variable

3,000

90 Hz

Output: Speaker

resistor in

Terminal

motor. (M601)

(CNP201 Load
resistance: 4 ohms)

Instrument

Connection

Specified

Value

Test

Tape

TAPE SECTION

Position of each switch or control

Volume control

Max

Function switch

Tape/Power Off

• Bias Oscillation

Adjustment Point

• Playback Amplifier Sensitivity Check

Instrument Connection

Test Tape

MTT-118

1.1 V

3 dB

Speaker Terminal
(Load resistance: 4 ohms)

Specified Value

ADJUSTMENT

TUNER SECTION

fL: Low-range frequency
fH: High-range frequency

• FM IF/RF

FM Detection

fL: L2

Band Coverage

fH: TC2

FM Tracking

fL: 88.0 MHz: L1
fH: 108.0 MHz: TC1

Test Stage

Specified

Value/Adjusting

Point

Instrument

Connection

Input: Pin 1 of IC1
Output: Pin 18 of IC1

Input: Antenna
Output: Speaker
Terminal (CNP201
Load resistance: 4
ohms)

• AM IF/RF

AM IF

Input: Antenna
Output: Pin 18 of IC1

fL: L4

Input: Antenna

Band Coverage

fH: TC4

Output: Speaker

AM Tracking

fL: 600 kHz: L3

Terminal (CNP201

fH: 1,400 kHz: TC3

Load resistance: 4
ohms)

Test Stage

Specified

Value/Adjusting

Point

Instrument

Connection

Figure 8 ADJUSTMENT POINTS

• Head Azimuth

Torque Meter

Specified Value

MTT-114

Output: Speaker Terminal
(CNP201 Load resistance: 4 ohms)

Adjusting

Point

Specified Value

Instrument

Connection

L301

80 kHz

6 kHz

Pin 1 of CNP101

M601

TAPE MOTOR

SW601
TAPE MAIN

TAPE MECHANISM

Variable resistor
in motor

VR201

SW201

CNP101

SW102

IC1

IC101

BI803

IC201

CNP602

BI802

BI801

L301

TC4

TC2

TC1

TC3

FM ROD ANTENNA

MAIN PWB

AM BAND
COVERAGE

AM IF

FM
DETECTION

BIAS OSC.

AM
TRACKING

AM BAR

ANTENNA

1 2 3

FM BAND
COVERAGE

IC802

IC803

IC801

CNP201

FM
TRACKING

Summary of Contents for QT-CD180(BL)

Page 1: ... OF CD CIRCUIT 16 TROUBLESHOOTING CD SECTION 17 FUNCTION TABLE OF IC 21 PARTS GUIDE EXPLODED VIEW PACKING OF THE SET FOR U S A ONLY In the interests of user safety the set should be restored to its original condition and only parts identical to those specified should be used SERVICE MANUAL SHARP CORPORATION No S1102QTCD180 This document has been published to be used for after sales service only Th...

Page 2: ... measure the AC voltage drop across the resistor IMPORTANT SERVICE NOTES FOR U S A ONLY AllcheckmustberepeatedwiththeAClinecordplugconnection reversed Any reading of 0 3 volt RMS this corresponds to 0 2 milliamp AC or more is excessive and indicates a potential shock hazard which must be corrected before returning the audio product to the owner SPECIFICATIONS Specifications for this model are subj...

Page 3: ... Main PWB Main PWB Main PWB Top Cabinet Top Cabinet Variable Capacitor Variable Capacitor A B Drum Dial Pointer Tuning Knob FL Mark Dial Pointer FH FL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 10 TAPE Record Button 11 CD Play Pause Button 12 CD Track Up Cue Button 13 Cassette Compartment 14 CD Stop Button 15 CD Track Down Review Button 16 CD Play Indicator 17 CD Pause Indicator 01 Volume Control 0...

Page 4: ...conexión OFF de la alimentación Label side up Con el lado de la etiqueta encarada hacia arriba To stop playback Press the STOP button Para detener la reproducción Pulse el botón STOP 1 2 3 4 5 1Preparation for use Preparación para su uso 2 Listening to a CD Audictión de CD 1 2 3 To stop playback Press the STOP EJECT button Para detener la reproducción PulseelbotónSTOP EJECT 1 2 1 2 Load the disc t...

Page 5: ...ire holders where they need to be removed when disassembling the unit After servicing the unit be sure to rearrange the leads where they were before disassembling 4 Take sufficient care on static electricity of integrated circuits and other circuits when servicing STEP REMOVAL PROCEDURE FIGURE Figure 5 3 Figure 5 1 Figure 5 2 Figure 5 5 Figure 5 4 Note After removing the connector for the optical ...

Page 6: ...main belt C1 x 1 pc from the motor pulley 2 Remove the FF REW belt C2 x 1 pc from the REW FF roller 3 Put on the belts in the reverse order of removal Note When putting on the belt ascertain that the belt is not twisted and clean it How to remove the motor See Fig 6 4 1 Remove the main belt See Fig 6 3 2 Remove the screws D1 x 2 pcs to remove the motor bracket 3 Remove the screws D2 x 2 pcs to rem...

Page 7: ...1 E1 x 1 Stop Washer Washer Flywheel How to remove the flywheel See Fig 7 1 1 Remove the belt See Fig 6 3 2 Remove the stop washer E1 x 1 pc with a small precision screwdriver to extract the flywheel from the capstan metal Note When the stop washer is deformed or damaged replace it with a new one How to reinstall the parts Install each part in the reverse order of the removal with care Note After ...

Page 8: ...pecified Value Adjusting Point Instrument Connection Input Pin 1 of IC1 Output Pin 18 of IC1 Input Antenna Output Speaker Terminal CNP201 Load resistance 4 ohms AM IF RF AM IF T3 Input Antenna Output Pin 18 of IC1 AM fL L4 Input Antenna Band Coverage fH TC4 Output Speaker AM Tracking fL 600 kHz L3 Terminal CNP201 fH 1 400 kHz TC3 Load resistance 4 ohms Test Stage Specified Value Adjusting Point In...

Page 9: ...short with the solder Resistor of 330ohm is put from 27 pin of IC802 and you must connect it to GND of PWB Refer to PWB of Figure9 1 PREPARATION FOR LASER LIGHT UP Figure 9 1 1 Remove the front cabinet according to the disassembly method 2 Short the TP of the Figure 9 1 to turn on the CD LID switch SW810 3 While holding down the Stop and Up button at same time move the FUNCTION switch to CD 4 Open...

Page 10: ...e LCD indicate to 1 Then cut the above circuit 2 In above TEST mode state press once the PLAY button The laser is light up when LCD indicate to cd SETTING METHOD FOR LASER LIGHT UP Figure 10 SETTING FOR MAXIMUM LASER POWER 1 In above laser light up state adjust the variable resistor VR1A on pickup PWB to maximum laser power Maximum laser power Rotate the variable resistor VR1A to clockwise Note Th...

Page 11: ... FRONT VIEW KRC107 M KTA1046 Y KTA1266 GR KTA1273 Y KTC3199 GR TYPES OF TRANSISTOR Resistor To differentiate the units of resistors such symbol as K and M are used the symbol K means 1000 ohm and the symbol M means 1000 kohm and the resistor without any symbol is ohm type resistor Besides the one with Fusible is a fuse type Capacitor To indicate the unit of capacitor a symbol P is used this symbol...

Page 12: ...8 7 6 4 5 1 2 3 8 7 6 4 1314 15 1211 10 1 2 3 4 5 6 7 8 9 1011121314 15 16 17 18 19 20 21 22 23 24 25 26 27 28 A P P SWITCHING 0 0022 1M 1M 0 0022 SWITCHING 1 2 3 SW102 D SW201 B SW201 C SW102 E SW102 H IC801 SW102 C SW102 B SW102 G SW102 F SW102 A IC101 BA3311L BIAS OSC RECORD PLAYBACK HEAD 4 67V 4 62V 0V 1 89V 0V 0V 0V 0 6V 0V 0V 0 6V CNS802 BI802 CNS801 BI801 BI803 CNP803 CNS803 M701 SLED MOTOR...

Page 13: ... 3 1211 10 P REGULATOR SW201 A VOLUME PWB A2 SW201 D REGULATOR RECORDING BIAS OSCILATOR SW102 D SW201 B SW201 C MAIN PWB A1 BIAS OSC BATTERY DC 9V D SIZE UM SUM 1 R20 OR HP 2 BATTERY x 6 R CH 4 OHM L CH 4 OHM AC 120V 60Hz 2 49V 2 49V 2 49V 2 49V 2 49V 2 49V 2 49V 2 49V 2 49V 2 49V 2 49V 2 49V 2 49V 2 49V 0V 0V 0V 0V 4 98V 0V 0V 0V 0V 4 98V 0V 4 98V 4 98V 0V 4 97V 0V 0V 0V 0V 0V 0V 0V 0V 0V 4 97V 2...

Page 14: ...CNP101 C843 R821 C825 R843 C823 R826 C827 R827 C826 C833 R828 FW806 IC101 R109 C111 C112 R110 C110 C116 R114 R102 C106 R106 SW102 C107 R101 R107 C105 R105 R104 R103 R113 R115 C115 C113 C117 R121 C120 C109 R108 C108 IC1 C14 C11 R3 C15 C12 CF3 CF1 R1 R126 COR1 C352 R351 R10 T2 R11 R8 R9 C13 C16 C17 R117 R119 D101 R125 C121 R7 L1 C2 C3 F1 R4 D2 C22 R6 C123 L4 C21 R2 L2 C4 C1 C8 C18 C10 C9 R5 C20 C19 ...

Page 15: ... ROD ANTENNA 238 BR COLOR TABLE RD R OR YL GR BL VL GY WH W BK PK BROWN RED ORANGE YELLOW GREEN BLUE VIOLET GRAY WHITE BLACK PINK T651 POWER TRANSFORMER 233 232 BATTERYS DC9 V D size UM SUM 1 R20 or HP2 battery x 6 1 5 4 3 2 1 7 8 6 5 4 3 2 1 PICKUP UNIT CD MOTOR PWB B POWER PWB A4 BK RD RD YL YL RD RD RD SO651 AC INLET SOCKET AC 120V 60Hz 2 235 2 3 12 13 8 10 4 5 1 6 14 15 11 16 17 7 9 CD MOTOR P...

Page 16: ... 2 3 FEI RFGO RFRP IC802 62Pin IC801 19Pin IC801 17Pin 5 9 10 STOP PLAY 1 2 3 TEI TRO SBAD IC802 64Pin IC802 67Pin IC802 63Pin 6 11 7 12 13 14 STOP PLAY 1 2 3 TMAX SBOX DMO IC802 50Pin IC802 45Pin IC802 72Pin STOP PLAY 1 2 3 TEI TRO FMO IC802 64Pin IC802 67Pin IC802 71Pin 6 11 15 6 11 15 CUE 1 2 3 TEI TRO FMO IC802 64Pin IC802 67Pin IC802 71Pin REVIEW 1 2 3 TEI TRO FMO IC802 64Pin IC802 67Pin IC80...

Page 17: ...Cleaning Disc PARTS CODE UDSKA0004AFZZ Cleaner Liquid Figure 17 When the CD 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 Remove the cabinet and follow t...

Page 18: ... Yes No No The optical pickup is faulty Check as stated in item FOCUS SERVO SAWTOOTH WAVE FAILURE Yes Check the periphery of IC801 and BI801 CNS801 Is it normal No Check the pattern between pin 13 of IC801 and pin 63 of IC802 Check the periphery of IC801 and BI801 CNS801 IC801 is faulty Yes Is 5V applied to the emitter of Q204 Is 5V applied to the collector of Q204 Yes No No Check the PWB pattern ...

Page 19: ...nd IC803 No BI801 CNS801 connection failure or optical pickup failure Yes Spindle motor clv servo failure Is above wave obtained between pins 5 and 6 of IC803 Is following wave output to the pin 72 DMO of IC802 when the Function is changed to PLAY from STOP No Yes Check the procedure in HF ERROR If OK IC802 is faulty Check the PWB pattern between pin 72 DMO of IC802 and pins 5 and 6 of IC803 If OK...

Page 20: ... the following wave output to the pins 12 TEO of IC801 during track search in normal playback Yes Yes No Check as stated in item SLED MOTOR OPERATION FAILURE No IC802 failure No Check the PWB pattern between pin 67 TRO of IC802 and pin 25 of IC803 Check the PWB pattern between pins 26 and 27 of IC803 and Optical pickup If OK Optical pickup failure Yes Is the above wave output to the pins 64 TEI an...

Page 21: ... CKSTP instruction executed the device s current consumption is reduced to 1µA or less allowing for the supply voltage to be lowered to 2 0V The device is reset and the program starts from address 0 when a voltage of 2 7V or more is applied to this pin when it is at 0V power on reset 21 K0 P1 0 TRAY CLOSE Input 4 bit CMOS I O ports 22 K1 P1 1 TRAY OPEN Input These ports can be set for input or out...

Page 22: ... a program 43 DOUT DOUT Input Output Digital output pin 44 SBSY SBSY Input Output Subcode block sync output pin It outputs a high at the S1 position when subcode sync is detected 45 SBOK SBOK Input Output Subcode Q data CRCC determination result output pin It outputs a high when CRCC check is found OK 46 VDD VDD1 Input Output CD unit s digital block power supply pins 47 VSS VSS1 Input Output Norma...

Page 23: ...ed for output ports if they have been set for CD control signal input output pins 77 XVSS XVSS Input Output CD s crystal oscillator power supply pins Normally connect these pins to the power supply lines that are used in common for the VDD and VSS pins 78 XI XI Input Output CD s crystal oscillator input output pins 79 XO XO Input Output Normally connect 16 934MHz here This clock is used as the sys...

Page 24: ... case it is possible to count pulses or generate an interrupt at a given pulse count address 3 93 MXO MXO Input Crystal oscillator pins for the controller 94 MXI MXI Input The oscillator clock is used as the timebase for the clock facility or as the controller s system clock Connect a 4 5MHz or 75kHz crystal resonator to the MXO and MXI pins Since these pins do not contain internal feedback resist...

Page 25: ...type VCT Semiconductor type VC MF Cylindrical type without lead wire VC MN Cylindrical type without lead wire VC TV Square type without lead wire VC TQ Square type without lead wire VC CY Square type without lead wire VC CZ Square type without lead wire VC J The 13th character represents capacity difference J 5 K 10 M 20 N 30 C 0 25 pF D 0 5 pF Z 80 20 If there are no indications for the electroly...

Page 26: ...115 116 VCQYKA1HM183K J AB 0 018 µF 50V Mylar C117 118 RC GZA106AF1C J AB 10 µF 16V Electrolytic C119 RC GZA225AF1H J AB 2 2 µF 50V Electrolytic C120 RC GZA476AF1C J AB 47 µF 16V Electrolytic C121 122 VCKYPA1HF103Z J AB 0 01 µF 16V C123 RC GZA227AF1A J AB 220 µF 10V Electrolytic C202 RC GZA476AF1C J AB 47 µF 16V Electrolytic C203 VCKYPA1HF103Z J AB 0 01 µF 16V C204 VCKYPA1HF223Z J AB 0 022 µF 50V ...

Page 27: ...ZZ J AE Connector Ass y 5 5Pin BI803 CNS803 QCNWN0252SJZZ J AE Connector Ass y 6 6Pin CNP101 QCNCW001DSJZZ J AC Plug 4Pin CNP201 QCNCW008CSJZZ J AD Plug 3Pin CNP602 QCNCW002BSJZZ J AC Plug 2Pin CNP803 QCNCM035FSJZZ J AD Plug 6Pin CNS101 QCNWN0010SJZZ J AG Connector Ass y 4Pin CNS201 QCNWN0256SJZZ J AD Connector Ass y 3Pin CNS602 QCNWN0255SJZZ J AD Connector Ass y 2Pin FW806 QCNWN0253SJZZ J AE Flat...

Page 28: ...GD202106058 J AR Motor with Pulley Tape 242 7 SW601 9GD202100051 J AD Switch Leaf Type Tape Main 243 RCORF0008SJZZ J AD Core 601 XBBSD26P06000 J AA Screw ø2 6 6mm 602 XESSD30P08000 J AA Screw ø3 8mm 603 XUBSD25P10000 J AB Screw ø2 5 10mm 604 XUBSD30P08000 J AA Screw ø3 8mm 605 XUBSD30P10000 J AA Screw ø3 10mm 606 XUBSD30P12000 J AA Screw ø3 12mm 607 XUBSD30P14000 J AB Screw ø3 14mm 609 XWSSJ26 060...

Page 29: ...QT CD180 A B C D E F G H 1 2 3 4 5 6 Figure 4 CD MECHANISM EXPLODED VIEW 4 701 304 701 302 301 702 303 M702 703x2 305x2 SW702 M701 305 PWB B 704 306 ...

Page 30: ...5 x3 PWB A2 PWB A1 SP201 BELT CONNECTION SP202 PWB A3 TAPE MECHANISM LCD801 SO651 PWB A4 T651 208 604 241 241 2 241 1 221 209 237 203 603 231 214 605x2 225 225 605x2 242 242 1 242 2 242 3 242 4 242 5 242 6 M601 242 7 SW601 602x2 204 207 234 205 605 605x2 605x2 603x3 601 609 605x5 605 605x2 240 201 227 236 213 222 223 237 604 605x2 213 224 226 243 238 239 206 202 607x2 232 235 605 607 607 229 605 2...

Page 31: ...FF VOLUME DOWN Not Replacement Item 6 Polyethylene Bag Unit SSAKH0001SJZZ Packing Case SPAKC0142SJZZ VJ No Label TLABZ0015SJZZ Energy Star Label TLABZ0031SJSC Battery Compartment Lid Packing Add Left Right SPAKA0056SJZZ Polyethylene Sheet Unit SPAKZ0014SJZZ FRONT FRONT Operation Manual R L FRONT Serial No Label TLABN0120SJZZ AC Power Supply Cord ...

Page 32: ...electronic mechanical photocopying recording or otherwise without prior written permission of the publisher COPYRIGHT 2001 BY SHARP CORPORATION ALL RIGHTS RESERVED A0101 2312DS HA C SHARP CORPORATION Communication Systems Group Quality Reliability Control Center Higashihiroshima Hiroshima 739 0192 Japan Printed in Japan SC LAG ...

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