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SPECIFICATIONS ............................................................................................................................................................. 2
VOLTAGE SELECTION ..................................................................................................................................................... 2
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ................................................................................................. 2
NAMES OF PARTS ........................................................................................................................................................... 3
HOW TO SET THE POINT "0" ON TUNER DIAL MEMORY ............................................................................................. 3
DISASSEMBLY .................................................................................................................................................................. 4
REMOVING AND REINSTALLING THE MAIN PARTS ..................................................................................................... 5
ADJUSTMENT ................................................................................................................................................................... 6
NOTES ON SCHEMATIC DIAGRAM ................................................................................................................................ 9
TYPES OF TRANSISTOR ................................................................................................................................................. 9
VOLTAGE .......................................................................................................................................................................... 9
SCHEMATIC DIAGRAM .................................................................................................................................................. 10
WIRING SIDE OF P.W.BOARD ....................................................................................................................................... 12
PARTS GUIDE/EXPLODED VIEW
SERVICE MANUAL
MODEL
MODEL
CONTENTS
SHARP CORPORATION
- 1 -
RADIO CASSETTE RECORDER
QT-222W(S)
RADIO CASSETTE RECORDER
QT-222W(BK)
• 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.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
QT-222W
No. SX376QT222W//
Page
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Summary of Contents for Sharp QT-222W(S)
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Page 1: Table Of Contents
VOLTAGE ..................................9 SCHEMATIC DIAGRAM ..............................10 WIRING SIDE OF P.W.BOARD ............................12 PARTS GUIDE/EXPLODED VIEW This document has been published to be used SHARP CORPORATION for after sales service only. The contents are subject to change without notice. – 1 –... -
Page 2: Specifications
QT-222W FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. SPECIFICATIONS General AC 110-127/220-240 V, 50/60 Hz Power source DC 6 V [“D” size (UM/SUM-1, R20 or HP-2) battery x 4] Power consumption Output power MPO: 3 W (AC operation, 10 % T.H.D.) RMS: 1.5 W (DC operation, 10 % T.H.D.) -
Page 3: Names Of Parts
QT-222W NAMES OF PARTS 1. Earphone Socket 2. Built-in Microphone 3. Function Switch 4. Band Selector 5. Fine Tuning Control 6. Volume Control 7. Tuning Control 8. Pause Button 9. Stop/Eject Button 10. Cassette Compartment 11. Fast Forward Button 12. Rewind Button 13. -
Page 4: Disassembly
QT-222W DISASSEMBLY Caution on Disassembly Follow the below-mentioned notes when disassembling the (B5)x1 unit and reassembling it, to keep it safe and ensure excellent (B2)x1 (B1)x2 performance: ø3x8mm 1. Take cassette tape out of the unit. (B5)x1 2. Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit. -
Page 5: Removing And Reinstalling The Main Parts
QT-222W REMOVING AND REINSTALLING THE MAIN PARTS (A1)x2 TAPE MECHANISM SECTION ø2x7mm Perform steps 1 to 2 of the disassembly method to remove the tape mechanism. (See page 4.) Hook (A2)x2 Lug Wire How to remove the record / playback and erase Record/Playback heads (See Fig. -
Page 6: Adjustment
QT-222W ADJUSTMENT TUNER SECTION fL: Low-range frequency fH: High-range frequency L109 SPEAKER Figure 6 FM Section Step Alignment Test Equipment Signal-in Signal-out Adjust Remark Frequency FM IF: (1) FM IF sweep Inject the IF Signal are taken Adjust T106 (1) Band SW in FM. 10.7 MHz generator sweep signal... - Page 7 QT-222W MW Section Step Alignment Test Equipment Signal-in Signal-out Adjust Remark Frequency MW IF: 455 kHz (1) AM IF sweep Let the MW ANT Take out the signal Adjust T105 get MAX. (1) Band SW in MW generator with coil close to the from point TP4 output at 455 kHz position...
- Page 8 QT-222W MECHANISM SECTION TAPE Section Step Output Item Condition Connection Adjust Head Playback test tape Connect VTVM and oscilloscope to Head fixing screw Adjust to get MAX. adjustment MTT-113 6.3 kHz speaker output (see Fig 8-2.) audio output 80 kHz ± 1 kHz Bias Frequency Record position Connect frequency counter to TP5 and...
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Page 9: Notes On Schematic Diagram
QT-222W NOTES ON SCHEMATIC DIAGRAM • Resistor: DESCRIPTION POSITION REF. NO To differentiate the units of resistors, such symbol as K and SW101 BAND SELECTOR FM—MW—SW1—SW2 M are used: the symbol K means 1000 ohm and the symbol SW201 FUNCTION TAPE—RADIO M means 1000 kohm and the resistor without any symbol is ohm-type resistor. -
Page 10: Schematic Diagram
QT-222W IC201 92L28402209000 (KA2209) MW/SW1/SW2 SIGNAL FM SIGNAL SW101 SW101 SW101 SW101 SW101 SW101 SW201 FUNCTION SW202 RECORD/ PLAYBACK SW202 RECORD/ PLAYBACK SW201 FUNCTION SW202 RECORD/ PLAYBACK SW202 RECORD/ PLAYBACK PLAYBACK SIGNAL RECORD SIGNAL • NOTES ON SCHEMATIC DIAGRAM can be found on page 9. Figure 10 SCHEMATIC DIAGRAM (1/2) –... - Page 11 QT-222W L28402209000 (KA2209) IC101 9228402003010 (CD2003GP) QUAD GND2 RF IN RF OUT FM SW FM/AM AM MIX FM MIX GND1 IF IN IF IN RF IN IC BLOCK DIAGRAM HP201 HEADPHONES SW201 FUNCTION SW201 FUNCTION SW401 AC POWER SUPPLY CORD AC 220-240 V AC 110-127 V AC 110-127 V/...
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Page 12: Wiring Side Of P.w.board
QT-222W L109 MAIN PWB-A SP201 SPEAKER E B C C137 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 CNP201 C B E M201 TAPE MOTOR (245-1) ERASE HEAD (245-3) CNP202 RECORD/ PLAYBACK C B E HEAD (245-2) TAPE MAIN... - Page 13 QT-222W MAIN PWB CNS401 COLOR TABLE POWER-B BROWN RD(R) ORANGE YELLOW GREEN BLUE VIOLET GRAY WH(W ) WHITE BLACK PINK AC POWER SUPPLY CORD AC 110-127 V/ AC 220-240 V, 50/60 Hz SO401 AC INPUT SOCKET SW401 AC 110-127 V/ VOLTAGE SELECTOR AC 220-240 V, AC 220 V-240 V...
- Page 14 QT-222W –– MEMO –– – 14 –...
- Page 15 “HOW TO ORDER REPLACEMENT PARTS” To have your order filled promptly and correctly, please furnish the For U.S.A. only following information. Contact your nearest SHARP Parts Distributor to order. 1. MODEL NUMBER 2. REF. No. 3. PART NO. 4. DESCRIPTION For location of SHARP Parts Distributor, Please call Toll-Free;...