Sharp QT-CD111H Service Manual
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- Operation manual (40 pages)
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Illustration: QT-CD111H
SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2
IMPORTANT SERVICE NOTES (111H FOR UK ONLY) .................................................................................................. 3
SPECIFICATIONS ............................................................................................................................................................. 3
NAMES OF PARTS ........................................................................................................................................................... 4
DISASSEMBLY .................................................................................................................................................................. 5
REMOVING AND REINSTALLING THE MAIN PARTS ..................................................................................................... 6
ADJUSTMENT ................................................................................................................................................................... 7
NOTES ON SCHEMATIC DIAGRAM ................................................................................................................................ 9
TYPES OF TRANSISTOR ................................................................................................................................................. 9
BLOCK DIAGRAM ........................................................................................................................................................... 10
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ............................................................................................. 12
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 18
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 19
FUNCTION TABLE OF IC ................................................................................................................................................ 22
PARTS GUIDE/EXPLODED VIEW
SERVICE MANUAL
CONTENTS
SHARP CORPORATION
- 1 -
QT-CD111H
QT-CD110H
QT-CD110H is different from QT-CD111H in
Control Panel color.
• 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.
• Note for users in UK
Recording and playback of any material may require consent
which SHARP is unable to give. Please refer particularly to the
provisions of Copyright Act 1956, the Dramatic and Musical
Performers Protection Act 1956, the Performers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
QT-CD111H/110H
No. S6844QTCD111H
Page
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Related Manuals for Sharp QT-CD111H
Summary of Contents for Sharp QT-CD111H
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Page 1: Table Of Contents
• Note for users in UK Recording and playback of any material may require consent which SHARP is unable to give. Please refer particularly to the provisions of Copyright Act 1956, the Dramatic and Musical Performers Protection Act 1956, the Performers Protection Acts 1963 and 1972 and to any subsequent statutory enactments and orders. -
Page 2: Safety Precaution For Service Manual
QT-CD111H/110H SAFETY PRECATION FOR Laser Diode Properties Material: GaAIAs SERVICE MANUAL Wavelength: 780 nm Precaution to be taken when replacing and servicing the Emission Duration: continuous Laser Pickup. Laser Output: max. 0.6 mW The ael (ACCESSIBLE EMMISSION LEVEL) of the laser power output is less than class 1 but the laser component is capable of emitting radiation exceeding the limit for class 1. -
Page 3: Important Service Notes (111H For Uk Only)
QT-CD111H/110H FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. IMPORTANT SERVICE NOTES (111H FOR UK ONLY) Before returning the unit to the customer after completion of a repair or adjustment it is necessary for the following withstand voltage test to be applied to ensure the unit is safe for the customer to use. -
Page 4: Names Of Parts
QT-CD111H/110H NAMES OF PARTS 1. Cassette Compartment 2. CD Compartment 3. Tuning Control 4. (TAPE) Record Button: 5. (TAPE) Play Button: 6. (TAPE) Rewind Button: 7. (TAPE) Fast Forward Button: 8. (TAPE) Stop/Eject Button: 9. (TAPE) Pause Button: 10. CD Eject Button:... -
Page 5: Disassembly
QT-CD111H/110H DISASSEMBLY Caution on Disassembly (D2)x1 (D1)x5 Follow the below-mentioned notes when disassembling the ø3x10mm Switch PWB unit and reassembling it, to keep it safe and ensure excellent (C1)x2 performance: ø3x10mm 1. Take cassette tape and compact disc out of the unit. -
Page 6: Removing And Reinstalling The Main Parts
QT-CD111H/110H REMOVING AND REINSTALLING THE MAIN PARTS CD MECHANISM SECTION Perform steps 1, 2, 4 and 6 of the disassembly method to remove the CD mechanism. (A1) x2 How to remove the pickup (See Fig. 6.) 1. Remove the screws (A1) x 2 pcs., to remove the shaft (A2) 2.6 x6mm... -
Page 7: Adjustment
QT-CD111H/110H ADJUSTMENT MECHANISM SECTION TUNER SECTION • Driving Force Check fL: Low-range frequency fH: High-range frequency Torque Meter Specified Value • FM IF/RF PLAY: TW-2412 Over 120 g Specified Instrument Test Stage • Torque Check Value/Adjusting Connection Torque Meter Specified Value... - Page 8 QT-CD111H/110H CD SECTION Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is necessary to reajust it. Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
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Page 9: Notes On Schematic Diagram
QT-CD111H/110H NOTES ON SCHEMATIC DIAGRAM • Resistor: 1. Tuner To differentiate the units of resistors, the symbol as K and M ( ): AM mode are used: the symbol K means 1000 ohm and the symbol M Marking except for ( ): FM mode means 1000 kohm and the resistor without any symbol is an 2. -
Page 10: Block Diagram
QT-CD111H/110H Figure 10 BLOCK DIAGRAM (1/2) – 10 –... - Page 11 QT-CD111H/110H Figure 11 BLOCK DIAGRAM (2/2) – 11 –...
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Page 12: Schematic Diagram / Wiring Side Of P.w.board
QT-CD111H/110H IC701 NO. VOLTAGE NO. VOLTAGE SWITCH PWB-A2 0.4V SW774 Q805 3.9V 3.1V TRACK DOWN/ S9012H 1.5V REVIEW 2.4V 4.1V 2.4V SW773 4.1V 2.4V R842 TRACK UP/ CUE 2.4V C849 2.4V 0.022 2.4V 0.4V 2.4V C848 SW771 0.4V 2.4V PLAY/ 1/50 2.4V... - Page 13 QT-CD111H/110H R801 TR– C801 0.01 FO– FO– R860 C847 FO– TR– 0.01 TR– R871 C850 4.7K PICKUP UNIT C845 4.7/50 R858 C841 0.047 XL801 EFLG DEFI XVSS 16.93MHz SBSY C842 VVss 0.047 ISET XOUT R838 C834 IC802 XVDD 0.033 R857...
- Page 14 QT-CD111H/110H 330K 820K ROD ANTENA B.P.F. 0.022 (CH) LA1186N 0.022 1.2K 220/10 FM FRONT END FM BAND 0.022 0.0039 470P COVERAGE RF AMP. FM DET 1 2 3 6.8K 3.3/50 3.3/50 1N4148 MPX VCO CK 76kHz TRACKING NO. VOLTAGE LA1805 0.001...
- Page 15 QT-CD111H/110H MAIN PWB-A1(1/2) HEADPHONES PWB-A4 NO. VOLTAGE VOLTAGE R227 120 1.6V 1.2V (0V) 1.6V 1.9V (1.6V) R228 6V (6.3V) 1V (1.3V) AM SIGNAL 0.2V (0.7V) 1.7V 1.6V 1.5V (1.7V) FM SIGNAL 1.5V (1.5V) 0.4V (0.4V) 6.1V (6.4V) CD SIGNAL 2.5V 6.1V (6.4V)
- Page 16 QT-CD111H/110H HEADPHONES PWB-A4 1 2 3 1 2 3 4 CNP101 C351 J201 CNP201 FW202 HEADPHONES SW102 R228 R227 C353 B C E Q351 FW202 C354 D102 C123 C216 R220 C234 C233 C218 C228 C217 R221 R225 E C B...
- Page 17 QT-CD111H/110H SPEKERS SP502 SP501 R-CH L-CH COLOR TABLE BROWN RD(R) ORANGE CNS201 YELLOW SW601 M601 GREEN TAPE MAIN TAPE MOTOR BLUE (241-7) (241-6) VIOLET GRAY WH(W) WHITE TAPE BLACK ERASE HEAD RECORD/PLAYBACK PINK (241-5) HEAD(241-4) CNS101 (211) T601 TERMINAL PWB-A3...
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Page 18: Waveforms Of Cd Circuit
QT-CD111H/110H WAVEFORMS OF CD CIRCUIT 50ms STOP PLAY REVIEW 0.50 V 10.0 V FOCUS SERCH IC801 20 F.E 50ms 10.0 V 50ms 5.0 V 0.50 V IC801 54 DRF 50ms 1.00 V 0.5ms 10.0 V 0.5ms 0.5ms 1.00 V 10.0 V 0.5ms... -
Page 19: Troubleshooting (Cd Section)
QT-CD111H/110H TROUBLESHOOTING (CD SECTION) 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. - Page 20 QT-CD111H/110H • Playback can only be performed when a disc is loaded. Check the laser diode driver. Is the Focus servo active? (Can you hear it working?) Check the area around IC801(16) - (21) (focus servo circuit). If the disc is not turning, the DRF Does the DRF signal change from "L"...
- Page 21 QT-CD111H/110H • Checking the spin system. Play operation is performed without disc. The spin driver circuit is normal. The turntable rotates a little. Check the periphery of IC801 pins 23 to 27, pin 39 and pin 40, The turntable fails to rotate or rotates at high speed.
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Page 22: Function Table Of Ic
QT-CD111H/110H FUNCTION TABLE OF IC IC701 RH-iX0105AWZZ (IX0105AW): System Control Microcomputer Pin No. Terminal Port Name Input/ Function Name Output MTCONT2 Input/Output Used to input or output 4 bits at a time. When the output latch is set to "1", the unit will be in the input mode. -
Page 23: Packing Method (111H For Uk Only)
QT-CD111H/110H PACKING METHOD (111H FOR UK ONLY) • Setting position of switches and knobs 1. AC Power Supply Cord QACCB0001SJ00 2. Polyethylene Bag, Unit SSAKH0001SJZZ Tape Mechanism Control STOP STATE 3. Packing Add., Left/Right SPAKA0001SJZZ TUNING 4. Packing Case SPAKC0005SJZZ...