sony_wm-we1.pdf

MICROFILM CASSETTE PLAYER Tourist Model Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeMT-WMEX550-125 SPECIFICATIONS SERVICE MANUAL WM-WE1 2 TABLE OF CONTENTS 1.SERVICE NOTE. 2 2.GENERAL. 5 3.DISASSEMBLY. 6 4.MECHANICAL ADJUSTMENT. 11 5.ELECTRICAL ADJUSTMENT. 11 6.DIAGRAMS 6-1.Block Diagram . 13 6-2.Schematic Diagram MAIN Section . 15 6-3.Printed wiring Board MAIN Section . 19 6-4.Printed wiring Board TMR Section . 22 6-5.Schematic Diagram TMR Section . 25 6-6.IC Pin Function Description . 29 7.EXPLODED VIEWS. 30 8.ELECTRICAL PARTS LIST.33 Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam- aged by heat. Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C dur- ing repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. SECTION 1 SERVICE NOTE Service Mode Mode for operating the mechanism section with the MAIN board and TMR board opened. 1.Setting 1) Refer to “3. Disassembly”, and remove the cabinet and open the MAIN board and TMR board. 2) Connect the motor and plunger to the MAIN board using jumper wires. These can be connected easily with the use of the extension tool (1-769-143-11) (ten in one set). 3) Turn OFF the BLSKIP switch (S703). 4) Connect the MAIN board to the TMR board using flexible board for service only. 5) Press the REPEAT switch (S3),FFswitch (S2) and supply 1.2V to the and terminals of the battery using a regulated power supply. 2.Preset state To set the PLAY, FF, REW modes, the preset state must be set. 1) Check that the lever (SW) and F/R switch (S702) are set to the center position. If not, set the preset state as follows. 2) Move the F/R switch (S702) to the side which the lever (SW) is facing. 3) The lever (SW) will move when the regulated power supply switch is set to OFF once and then set to ON. Move the F/R switch (S702) according to this timing and set to the center position. 3.FF, REW Modes 1) Check that the preset state is set and press theFF andREWswitches. 4.PLAY mode 1) Check that the preset state is set. 2) Pressing the REPEAT switch on the keyboard unit will move the lever (SW) once towards the F side and then to the R side. Moving the F/R switch (S702) according to this timing will set the PLAY mode (R side). Pressing the REPEAT switch another time and moving the F/R switch (S702) ac- cording to the movement of the lever (SW) will set the PLAY (F side) mode. Note 1: If the above fails, perform from preset again. Note 2: Do not touch the , p, FF, REW switches with your hands, but using a stick with a round tip. Note 3: When using headphones, the timing for moving the S702 can be determined from the beep sound. 3 Connect to plunger S702 F/R Switch (FWDnSTOPnREW) Center Connect to motor Battery terminal (+) Battery terminal () Flexible board for service only Side F ?N nSide R IC701 IC301 CN1 MAIN Board Side B TMR Board Side A Lever (SW) senter lever (SW) side R side F Precaution When act repair, take the main unit and wireless receiver of a cus- tomer, because rewriting ID code to some parts replacement. After repair check the main unit action control from the wireless receiver. Rewriting ID Code The main unit action control from the wireless receiver in this set. Make a 14 ID codes (0001 1110) and each set include, because protecting wrong action from another set operation signals. The ID code rewrite to wireless receiver replacement and EEPROM (IC704) replacement (Lost of ID code data.) Method 1.Turn ON the WIRELESS switch (S704) of main unit. (Dont connect to headphones.) 2.Press the two buttons p andREWsimultaneously and the LED light of main unit. 3.Straighten headphones cord and press continueREPEAT button, then LCD displays ID code. (4 figure, 0 or 1 charac- ters.) 4.Battery remove, the ID code rewriting complete. 5.After repair check the action. Check ID code main units 1.Turn ON the WIRELESS switch (S704) of main unit. (Dont connect to headphones.) 2.Straighten headphones cord and close the main unit. 3.Press the two buttons p andFFsimultaneously and the LED light ON of main unit, then press REPEAT button and LCD displays main units ID code of wireless receiver. Check ID code wireless receivers 1.Press continue CH button, and insert battery of wireless re- ceiver 2.LCD displays wireless receivers ID code. 4 Rotation system Rotation system during PLAY. Rotation system during FF. Rotation system during REW. gear (TB) gear (REEL) (T side) gear (Y) gear (NR) motor pulley pulley (reverse) clutch assy (M) flywheel (R) assy flywheel (N) assy gear (FR) (FF: left side) Pulley (reverse)flywheel (R) assy flywheel (N) assy gear (Y) gear (TA) gear (TB)gear (S) motor pulley gear (REEL) (S side) gear (NR) (REV: right side/ FWD: left side) gear (REEL) (T side) clutch assy (M) gear (NR) gear (Y) gear (S) flywheel (N) assyflywheel (R) assy pulley (reverse) clutch assy (M) motor pulley gear (REEL) (S side) gear (FR) (REW: right side) 5 SECTION 2 GENERAL This section is extracted from instructio n man ual. 6 CASSETTE LID ASSY This set can be disassembled in the order shown below. SECTION 3 DISASSEMBLY SETCASSETTE LID ASSY (Page 6) CASE SUB ASSY (Page 7) REEL ORNAMENT ASSY (Page 7) MAGNETIC HEAD (HP901) (Page 8) TMR BOARD (PAGE 8) MAIN BOARD (Page 9) BELT (Page 10) MOTOR (M901) (Page 10) 5 cassette lid assy 2 serrat IB lock 4 boss 3 two bosses 1 Open the cassette lid assy. Note: Follow the disassembly procedure in the numerical order given. 7 CASE SUB ASSY Note on installation: Adjust to switch A, switch B and knob A, knob B. 4 case sub assy 1 serrat IB lock 2 two serrat IB locks 2 two serrat IB locks 3 two claws knob A knob B switch B switch A REEL ORNAMENT ASSY Note on installation: Adjust the knob (HOLD) and switch. knob (HOLD) switch 1 Push the reel ornamental assembly toward direction A, and disengage the pawl of the knob(OPEN). 3 Opening the reel ornamental assembly (3) toward direction B, shift it toward direction C. 4 Remove the reel ornament assy to direction of the arrow D A C D B 2 terminal board, battery 8 MAGNETIC HEAD (HP901) TMR BOARD 2 two screws (IB lock) 1 pinch lever (R) assy 1 pinch lever (N) assy 5 two screws (M1.4 7.2) 3 bracket assy 4 flexible board (CN301) 6 magnetic head (HP901) 1 two special head screws 2 serrat IB lock 4 TMR board A 3 Raise the TMR board from direction A to disconnect the connector (CN701). 9 MAIN BOARD 6 flexible board (CN301) 7 screw (IB lock) 4 screw 1 claw 8 MAIN board 2 guide (board) 5 terminal board assy, battery 3 Remove the solders of motoer (M901) and terminal board assy battery. 3 Remove the solders of plunger solenoid. S702 lever (SW) Note on installation: When the MAIN board, align the switch (S702) with the lever (SW) correctly. 10 BELT MOTOR (M901) 1 Remove the solder of terminal board, battery. 2 terminal board, battery 3 belt 2 Remove the motor (M901) to direction of the arrow. 1 two screws (IB lock) 11 SECTION 4 MECHANICAL ADJUSTMENTS SECTION 5 ELECTRICAL ADJUSTMENTS PRECAUTION 1.Clean the following parts with a denatured-alcohol-moistened swab: playback headpinch roller rubber beltscapstan 2.Demagnetize the playback head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.) 3.Do not use a magnetized screwdriver for the adjustments. 4.After the adjustments, apply suitable locking compound to the parts adjusted. 5.The adjustments should be performed with the rated power supply voltage (1.3 V) unless otherwise noted. Torque Measurement: ModeTorque meterMeter reading FWD 18 30 gcm CQ-102C (0.25 0.41 ozinch) FWD0.7 2.0 gcm back tension(0.006 0.027 ozinch) REV 18 30 gcm CQ-102RC (0.25 0.41 ozinch) REV0.7 2.0 gcm back tension(0.006 0.027 ozinch) FF CQ-201B more than 35gcm REW(more than 0.49 ozinch) PRECAUTION 1.Specified voltage: 1.3 V (DC) 2.Switch position aNR switch: OFF WIRELESS switch : OFF BL SKIP switch: OFF Test tape TypeSignalUsed for WS-48A3 kHz, 0 dBTape Speed Adjustment Tape Speed Adjustment Procedure: 1.Playback WS-48A (tape center part) in the FWD state and ad- just RV601 so that the frequency counter reading becomes 3,000 10 Hz. 2.Playback WS-48A (tape center) in the REV state. Check that the frequency counter reading is within 2.5% of the reading of step 1. * As the RV601 is mounted on the main board, adjust it through a hole in the TMR board. Adjutment Point: 16 Test tape WS-48A (3 kHz, 0dB) set 2 jack + frequency counter MAIN section RV1 L1 L2 RV601 TMR board MAIN board 12 Tracking Adjustment 1.Turn ON the WIRELESS switch. 2.Press REPEAT button (Tape is unnecessary) 3.Adjust L1 (Rch) and L2 (Lch) for adjustment value on the TP18 (OUT2) Adjutment value: * Repeat the procedures in each adjustment several time, and check the frequency. * If frequency is not fit, from set CH1 of the wireless receiver. Adjustment points: TMR board side B TMR section TP18 (OUT2) spectrum analyzer Adjustment pointCH1 L1 (Rch)243.25MHz 20kHz L2 (Lch)243.71MHz 20kHz ANT3 ANT1 RV1 IC1 L1 L2 ANT2 TP18 (OUT2) 27 28 IC Block Diagrams IC601MM1279XVBE (MAIN BOARD) IC1TA7765AF (TMR BOARD) Waveforms 3 Q9 BASE (Transmit CH2) 100mV/DIV, 10ns/DIV TMR SECTION 2 Q13 EMITTER 500mV/DIV, 10ns/DIV 4 Q10 BASE (Transmit CH1) 100mV/DIV, 10ns/DIV IC301TA2072AF (MAIN BOARD) MAIN SECTION 1 IC701 ! XT 200mV/DIV, 10s/DIV 530 mVp-p 32.768 kHz 370 mVp-p 51.38 MHz 1.3 Vp-p 52.9 MHz 350 mVp-p 51.15 MHz 29 1M.CTLOMotor control output terminal“H”: MOTOR ON 2M.DIROMotor rotational direction control output terminal“H”: CCW 3M.BRKOMotor drive circuit control output terminal“H”: BREAK ON 4PM CTLOPlunger control output terminal“H”: PLUNGER ON 5RESETIReset signal input terminal“H”: RESET 6TEST1ITest pin (connected to GND) 7TEST2ITest pin (connected to GND) 8TEST3ITest pin (connected to GND) 9SET STOPIStop signal input terminal 10BATT DETIPower supply voltage detection input terminal 11DATA INIReceivers receive data input terminal 12MODE SWI Reverse mode select and BL SKIP ON/OFF signal input terminal “H”: Reverse mode continuation, BL SKIP ON 13F/R CTLOFWD/REV select signal output terminal “H”: FWD“L”: REV 14MUTE CTLOAudio power amplifier muting control output terminal“L”: MUTE ON 15XTBOCrystal connection for clock oscillation (32.768 kHz) 16XTICrystal connection for clock oscillation (32.768 kHz) 17VDD1.5 V power supply terminal 18VSS1Ground terminal 19VCMIncreases the power supply voltage 20VCPIncreases the power supply voltage 21VSS2Increases the power supply voltage 22VEEIncreases the power supply voltage 23BEEPOOutputs a beep sound terminal (f=1.6 kHz) 24REWIREW signal input terminal 25FFIFF signal input terminal 26PLAIPLAY signal input terminal 27STOPISTOP signal input terminal 28AME INIMusic presence/absence detection terminal “H”: Present 29PHOTO INIRotation check input terminal 30TC DATA OUTOReceivers transmit data output terminal 31E2 DATAI/OEEPROM serial data input/output terminal 32E2 SCLK, PHOTOOEEPROM serial clock output terminal 33E2 CSOEEPROM control signal output terminal 34CH CTLOTransmit channel select signal output terminal 35TX CTLOTransmit circuit power control signal output terminal 36FWD SWIMD MODE switch signal input terminal“H”: FWD play 37REV SWIMD MODE switch signal input terminal“H”: REV play 38HOLDER SWIHOLDER open/close switch signal input terminal“L”: Close 39VDDPower supply terminal (+1.5V) 40HP PLUGIHeadphone connect detection signal input terminal 41L. BATTOPower supply voltage lower detection signal output terminal 42POWER CTLOAudio system power supply control signal output terminal 43RX CTLOReceive circuit power supply control signal output terminal 44LOAD CTLOBattery remain detect signal output terminal 6-6.IC PIN FUNCTION DESCRIPTION MAIN BOARD IC701 MSM6545-20GS (SYSTEM CONTROLLER) Pin No.Pin NameI/OFunction 30 SECTION 7 EXPLODE VIEWS Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. The mechanical parts with no reference num- ber in the exploded views are not supplied. Accessories and packing materials are given in the last of the electrical parts list. NOTE: -XX and -X mean standardized parts, so they may have some difference from the original one. Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE) . . . (RED) Parts Color Cabinets Color Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark (1) CASE SECTION 5 12 11 3 1 2 2 2 6 7 8 8 8 8 9 10 A A MT-WMEX550-125 4 1X-3374-344-1 CASE SUB ASSY (S) 23-010-838-24 LOCK, SERRAT IB 33-704-197-31 LOCK, SERRAT IB 43-018-190-01 BUTTON (CONTROL) 5X-3374-342-1 ORNAMENT ASSY, REEL 6X-3374-343-1 LID ASSY (S), CASS * 73-018-200-01 GUIDE (CASSETTE) 83-704-197-01 SCREW (IB LOCK) 9X-3374-345-1 HOLDER ASSY, CASSETTE 103-018-179-01 LEVER (B), LOCK 113-018-191-01 KNOB (OPEN) 123-309-595-11 SHEET, INSULATING PACK 31 51 52 53 54 55 55 56 5758 59 60 61 62 63 64 65 66 67 68 69 70 HP901 S901 71 72 73 ANT1 51X-3373-190-1 TERMINAL BOARD ASSY, BATTERY 523-018-181-01 LID, BATTERY CASE 533-375-114-41 SCREW 543-009-690-01 TERMINAL BOARD, BATTERY 553-704-197-01 SCREW (IB LOCK) 56A-3016-976-A MAIN BOARD, COMPLETE 573-010-520-01 COVER, SW 583-007-282-01 TERMINAL BOARD (MINUS), BATTERY 593-928-465-01 DETENT, CASSETTE 603-018-184-11 COVER (A), MD 61X-3372-850-1 PINCH LEVER (N) ASSY 623-704-413-31 SCREW (M1.4X7.2) 63X-3372-849-1 PINCH LEVER (R) ASSY Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark (2) MAIN BOARD SECTION 64X-3374-341-1 BRACKET ASSY 653-704-197-71 LOCK, SERRAT IB 663-011-277-01 COVER (B) (Y), MD 673-355-424-91 SCREW, TAPPING 68A-3016-977-A TMR BOARD, COMPLETE 693-815-381-01 CUSHION * 703-018-187-01 GUIDE (PC BOARD) * 713-020-713-01 SHEET (ELECTROSTATIC) 723-022-710-01 SPRING 733-831-441-99 SPACER ANT13-022-711-01 SPRING (ANTENNA COIL) HP9011-500-420-11 HEAD, MAGNETIC (PLAYBACK) S9011-762-793-21 SWITCH, LEAF 32 120 124 123 126 127 125 108 109102