索尼SONY WM-FX171电路图.pdf
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1、WM-FX171/FX173/FX177 Canadian Model WM-FX173/FX177 AEP Model E Model WM-FX171/FX173 SERVICE MANUAL RADIO CASSETTE PLAYER MICROFILM SPECIFICATIONS Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeMF-WMFX171-114 Frequency range FM : 87.6 - 107.9 MHz AM : 531 - 1,602 kHz Power require
2、ments 3V DC batteries R6 (AA) 2 / External DC 3V power sources Dimensions FX173 : 88.5 118.6 38.2 mm (3 1/2 4 3/4 1 9/16 inches) (w / h / d) incl. projecting parts and controls FX171/FX177 : 88.5 118.6 37.6 mm (3 1/2 4 3/4 1 1/2 inches) (w / h / d) incl. projecting parts and controls Mass FX173 : Ap
3、prox. 165 g (5.9 oz) / Approx. 245g (8.7 oz) incl. batteries and a cassette FX171/FX177 : Approx. 160 g (5.7 oz) / Approx. 240 g (8.5 oz) incl. batteries and a cassette Supplied accessories Stereo headphone or Stereo earphones (1) / Belt clip (1) Design and specifications are subject to change witho
4、ut notice. Photo : WM-FX173 Ver 1.2 2000. 01 With SUPPLEMENT (9-923-333-81) ? ? ? ? ? ? ? ? ? ? 2 TABLE OF CONTENTS Flexible Circuit Board Repairing Keep the temperature of the soldering iron aroud 270 C during repairing. Do not touch the soldering iron on the same conductor of the circuit board (wi
5、thin 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. SECTION 1 GENERAL 1.GENERAL2 2.DISASSEMBLY 2-1.Cabine
6、t (Front) Assy 3 2-2.Main Board4 2-3.Cassette Lid 4 2-4.Mechanism Deck 5 2-5.Belt, Motor (Reel/Capstan) 5 3.MECHANICAL ADJUSTMENT6 4.ELECTRICAL ADJUSTMENT6 5.DIAGRAMS 5-1.Block Diagram 8 5-2.Schematic Diagram (FX171/FX177 Models) 10 5-3.Printed Wiring Board (FX171/FX177 Models)13 5-4.Printed Wiring
7、Board (FX173 Model) 17 5-5.Schematic Diagram (FX173 Model) 21 5-6.IC Block Diagrams 24 6.EXPLODED VIEWS 6-1.Cabinet Section25 6-2.Main Board Section 27 6-3.Mechanism Section-1 28 6-4.Mechanism Section-2 29 7.ELECTRICAL PARTS LIST30 This section is extracted from instruction manual. LOCATION OF CONTR
8、OL ? ? ? ? ? ? ? ? ? ? 3 SECTION 2 DISASSEMBLY Note :Follow the disassembly procedure in the numerical order given. B C D E F G H I J K L A Cassette lid Cabinet (front) assy 1 Two screws screw (B 1.7 9), tapping 2-1.CABINET (FRONT) ASSY 2 Insert the precision screwdriver (1.4 mm flat-blade) into the
9、 slit at claw A and release the claw. 3 Remove the cabinet (front) assy. (Release all claws B to L in alphabetical order.) This set can be disassembled in the order shown below. 2-1. CABINET (FRONT) ASSY2-2. MAIN BOARD 2-3. CASSETTE LID 2-4. MECHANISM DECK2-5. BELT, MOTOR (REEL/CAPSTAN) ? ? ? ? ? ?
10、? ? ? ? 4 5 Spring (torsion) B A 1 Open the cassette lid. 4 Cassette lid. 2-2.MAIN BOARD 2-3.CASSETTE LID 2 Insert a precision screwdriver (1.4 mm flat-blade) vertically into portion A to release the hinge plate. 3 Portion B to release the hinge plate. 3 Remove the four solders. 4 Screw (M 1.4), too
11、thed lock (WH) 2 Flexible board (CN302) 6 MAIN board 5 Two claws 1 Head flexible board (CN301) ? ? ? ? ? ? ? ? ? ? 5 1 Insert the precision screwdriver (1.4 mm flat-blabe) in to the slit and release two claws. 2 Remove the mechanism deck in the direction of the arrow, 2 Two screws screw (M 1.4), spe
12、cial head 3 Motor (reel/capstan) 1 Belt 2-4.MECHANISM DECK 2-5.BELT, MOTOR (REEL/CAPSTAN) ? ? ? ? ? ? ? ? ? ? 6 SECTION 3 MECHANICAL ADJUSTMENT SECTION 4 ELECTRICAL ADJUSTMENT PRECAUTION 1.Clean the following parts with a denatured-alcahol-moistened sweb : Playback headPinch roller Rubber beltCapsta
13、n 2.Demagnetize the playback head using a demagnetizer. 3.Do not use a magnetized screwdriver for adjustments. 4.After adjusting, apply screw-locking compound onto the adjusted parts. 5.Unless specified otherwise, use a specified voltage (3.0V) to perform the adjustments. Torqu Measurement Mode FWD
14、FWD Back Tension REV REV Back Tension FF REW Torque meter CQ-102C CQ-102RC CQ-201B Meter reading 20 - 30 g cm 0.4 - 2.0 g cm 20 - 30 g cm 0.4 - 2.0 g cm More than 40 g cm PRECAUTION 1.Specified voltage : 3.0V 2.Switch position AVLS switch: NORM CASSETTE SECTION Test Tape Tape Speed Adjustmnet Proced
15、ure : 1.Playback WS-48A (Tape center part) and adjust RV601 so that the frequency counter reading becomes 3,000Hz 15Hz. 2.Playback WS-48A (Tape top and end). Check that frequency counter reading is within 1.5% of the reading of step1. Adjustment Point : MAIN BOARD SIDE B Type WS-48A Signal 3kHz, 0dB
16、 Purpose Tape Speed Adjustment Test tape WS-48A (3kHz, 0dB) Set *1 PHONES jack + Frequency counter RV601 : Tape Speed *1 16: E, EA, C & SA, PA Models. 32: AEP, IT, E, CND, FR Models. Abbreviation CND: Canadian IT: Italian EE: East European EA: Saudi Arabia FR: French PA: Panama C & SA : Central and
17、South America ? ? ? ? ? ? ? ? ? ? WM-FX171/FX173/FX177 SECTION 5 DIAGRAMS 5-1.BLOCK DIAGRAM 7 8 9 TUNER SECTION AM BAND switch : AM FM BAND switch : FM Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer ca
18、pacitors. Set *1 PHONES + FM RF signal generator 75kHz(100%) frequency deviation by 1Hz signal. Output level : as low as possible. 0.01F to IC1 pin 1 Level meter AM RF signal generator 30% amplitude modulation by 400Hz signal. Output level : as low as possible Put the lead-wire antenna close to the
19、set. CT1 (2/4) CT1 (1/4) CT1 (4/4) CT1 (3/4) Set jack *1 + Level meter (AC : 0.5 5V range) 2 AM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. L4 505 kHz 5 kHz (516.5 kHz 5 kHz) CT1 (4/4) 1,770 kHz 20 kHz (1,631.5 kHz 10 kHz) 1,690 kHz 10 kHz Adjustment Parts Location : M
20、AIN BOARD SIDE A MAIN BOARD SIDE B L1 : AM TRACKING Adjustment L3 : FM FREQUENCY COVERAGE Adjustment L2 : FM TRACKING Adjustment L4 : AM FREQUENCY COVERAGE Adjustment T1 : AM IF ( ) : EA, IT Models : EE Model FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. L3 86.0 MHz 0
21、.2 MHz (87.35 MHz 0.1 MHz) 64.0 MHz 0.2 MHz CT1 (3/4) 109.5 MHz 0.3 MHz (108.25 MHz 0.2 MHz) FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L286 MHz (87.35 MHz) 64.0 MHz CT1 (2/4)109.5 MHz (108.25 MHz) AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L1620 kHz
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