索尼SONY WM-EX527电路图.pdf
SERVICE MANUAL CASSETTE PLAYER E Model SPECIFICATIONS WM-EX527 Ver 1.0 2003.01 9-874-279-01Sony Corporation 2003A0500-1Personal Audio Company C 2003.01Published by Sony Engineering Corporation Model Name Using Similar MechanismWM-EX526 Tape Transport Mechanism TypeMT-WMEX505-162 Battery life* (Approx. hours) Sony alkaline LR6 (SG)* Tape playback35 * Measured value by the standard of JEITA(Japan Electronics and Information Technology Industries Association) (Using a Sony HF series cassette tape). *When using a Sony LR6(SG) “STAMINA” alkaline dry battery(produced in Japan). Note The battery life may be shorter depending on the operating condition, the surrounding temperature and battery type. Frequency response Playback: 30 - 18 000 Hz Output Headphones (i jack) Load impedance 8 300 ? Power requirements 1.5 V One R6 (size AA) battery Dimensions (w/h/d) Approx. 78.1 x 108.0 x 28.1 mm (excluding projecting parts and controls) Mass Approx. 161 g (main unit only) Supplied accessories Stereo headphones or earphones with remote control (1) Design and specifications are subject to change without notice. ? ? ? ? ? ? ? ? ? ? 2 WM-EX527 TABLE OF CONTENTS 1.SERVICING NOTES.3 2.GENERAL.5 3.DISASSEMBLY 3-1.Disassembly Flow .6 3-2.Cassette Lid Assy .6 3-3.Case Block Assy.7 3-4.Reel Ornament Block Assy.7 3-5.Battery Holder.8 3-6.Belt (F2) .8 3-7.MAIN Board .9 3-8.Motor (Capstan/Reel) (M901) . 10 3-9.Holder (FS) Section . 10 3-10. Pinch Lever (N) Assy, Pinch Lever (R) Assy . 11 3-11. Magnetic Head (Playback) (HP901) . 11 4.MECHANICAL ADJUSTMENTS. 11 5.ELECTRICAL ADJUSTMENTS. 11 6.DIAGRAMS 6-1.Block Diagram . 12 6-2.Note for Printed Wiring Board and Schematic Diagram . 13 6-3.Printed Wiring Board . 14 6-4.Schematic Diagram . 15 6-5.IC Pin Function Description . 16 7.EXPLODED VIEWS 7-1.Case Section . 18 7-2.Mechanism Deck Section (MT-WMEX505-162) . 19 8.ELECTRICAL PARTS LIST. 20 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. 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. ? ? ? ? ? ? ? ? ? ? 3 WM-EX527 SECTION 1 SERVICING NOTES This set detects the rotation of the idler gear (A) (side S) using the PH701 (photo reflector). The PH701 is mounted on the MAIN board, therefore the idler gear (A) (side S) cannot be detected with the MAIN board removed. As a result, the motor (M901) cannot be controlled, causing malfunction. Further, the DIRECTION switch (S701) is also mounted on the MAIN board, and with the board removed, the mechanism posi- tion cannot be detected and the operation is not changed over. Therefor, when the voltage check is executed with the MAIN board removed, follow the procedure provided below. 1.Setting (1)Refer to “3. DISASSEMBLY”, and remove the MAIN board. (2)Connect the MAIN board to the motor (M901) and the plunger (PM901) using jumper wires. These can be connected easily with the use of the extension tool (Part No. 1-769- 143-11) (ten in one set). (3)Short the TAPE DETECT switch (S901-1) terminals and the ATS switch (S901-2) terminals. (4)Connect the AF oscillator to the TP36 (PHOTO IN) and the TP46 (GND). (5)Supply 1.3 V to the battery terminals using the regulated power supply. 2.Preset state To set the PLAY, FF, REW modes, the preset state must be set. (1)Check that the slider (NR) and the DIRECTION switch (S701) are set to the center position. If not, set the preset state as follow. (2)Move the DIRECTION switch (S701) to the side, which the slider (NR) is facing. (3)The slider (NR) will move when the regulated power supply switch is set to OFF once and then set to ON. Move the DI- RECTION switch (S701) according to this timing and set to the center position. 3.FF, REW modes (1)Check that the preset state is set. (2)Input the square wave or sine wave to the TP36 (PHOTO IN) and the TP46 (GND). (3)Press thexbutton (S702) to set the STOP mode. (4)Press the FF button (S704) or the REW button (S705). 4.PLAY mode (1)Check that the preset state is set. (2)Input the square wave or sine wave to the TP36 (PHOTO IN) and the TP46 (GND). (3)Press thexbutton (S702) to set the STOP mode. (4)Press thebB REPEATbutton (S703) will move the slider (NR) once towards the side R and then to the side F. Move the DIRECTION switch (S701) according to this timing will set the PLAY mode (side F). Press thebB REPEATbutton (S703) another time and move the DIRECTION switch (S701) according to the movement of the slider (NR) will set the PLAY (R mode). Note 1: If the above fails, perform from preset again. Note 2: Use thebB REPEAT(S703),x(S702), FF (S704), and REW (S705) buttons on the remote controller as much as pos- sible. If no remote controller, do not touch the buttons with your hands, but using a stick with a round tip. Note 3: When using headphones, the timing for move the DIRECTION switch (S701) can be determined from the beep sound. + square wave (sine wave) 10 Hz, 3.5 dB MAIN Board (Side B) TAPE DETECT (S901-1) ATS (S901-2) connect to the plunger (PM901) battery terminal 3 battery terminal # connect to the motor (M901) PH701 SOUND (S706) S701 DIRECTION FWDTCENTERtREV TP46 (GND) FUNCTION (S708) x (S702) TP36 (PHOTO IN) REW (S705) YREPEAT (S703) FF (S704) AF oscillator ? ? ? ? ? ? ? ? ? ? 4 WM-EX527 SLIDER (NRA)Rotation system Rotation system during PLAY Rotation system during FFRotation system during REW slider (NRA) side Fside R center insert flywheel (N) insert flywheel (R) reverse pulley clutch assy (F) gear (Y) cam gear gear (REEL) (T side) motor pulley idler (A) gear (T side) gear (FR) (FF: left side) insert flywheel (N)insert flywheel (R) reverse pulley clutch assy (F) gear (Y) cam gear gear (REEL) (T side) motor pulley idler (A) gear (T side) gear (NR) (FWD: left side REW: right side) idler (B) gear idler (A) gear (S side) gear (REEL) (S side) insert flywheel (N) insert flywheel (R) reverse pulley clutch assy (F) gear (Y) cam gear motor pulley gear (FR) (REW: right side) idler (A) gear (S side) gear (REEL) (S side) ? ? ? ? ? ? ? ? ? ? 5 WM-EX527 B VOL REW FF Yx* OPEN OPEN YREPEAT* x FF (AMS BL SKIP/s) REW (AMSAVLS) FUNCTION SOUND VOL* BATT HOLD HOLD A Plug in firmly. *There is a tactile dot beside VOL on the main unit to show the direction to turn up the volume. * The button has a tactile dot. SECTION 2 GENERAL This section is extracted from instruction manual. ? ? ? ? ? ? ? ? ? ? WM-EX527 6 This set can be disassembled in the order shown below. 3-1.DISASSEMBLY FLOW SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 3-2.CASSETTE LID ASSY 3-4. REEL ORNAMENT BLOCK ASSY (Page 7) 3-2. CASSETTE LID ASSY (Page 6) 3-3. CASE BLOCK ASSY (Page 7) 3-9.HOLDER (FS) SECTION (Page 10) 3-10. PINCH LEVER (N) ASSY, PINCH LEVER (R) ASSY (Page 11) 3-11. MAGNETIC HEAD (PLAYBACK) (HP901) (Page 11) 3-8.MOTOR (CAPSTAN/REEL) (M901) (Page 10) 3-5. BATTERY HOLDER (Page 8) 3-7. MAIN BOARD (Page 9) 3-6. BELT (F2) (Page 8) Note 1: The process described in can be performed in any order. Note 2: Without completing the process described in , the next process can not be performed. SET 4cassette lid assy 2two screws (M1.4) 2screw (M1.4) 1Open the cassette lid assy. 3boss ? ? ? ? ? ? ? ? ? ? WM-EX527 7 3-3.CASE BLOCK ASSY 3-4.REEL ORNAMENT BLOCK ASSY 1three screws (M1.4) 1two screws (M1.4) 2case block assy 1two claws 2reel ornament block assy 1claw knob (hold) S707 On installation reel ornament, adjust the S707 and knob (hold). ? ? ? ? ? ? ? ? ? ? WM-EX527 8 3-5.BATTERY HOLDER 3-6.BELT (F2) 2two screws 3battery holder 1Break the soldering of battery terminal (+). 1Break the soldering of battery terminal (). 1belt (F2) (See page 4) ? ? ? ? ? ? ? ? ? ? WM-EX527 9 3-7.MAIN BOARD NOTE FOR INSTALLATION MAIN BOARD 2screw (M1.4) flexible board 1Remove six solders of flexible board. 1Remove two solders of plunger solenoid. 1Remove four solders of motor. 1Remove four solders of leaf switch. 3main board slider (NRA) S701 main board On installation main board, adjust the S701 and slider (NRA). ? ? ? ? ? ? ? ? ? ? WM-EX527 10 3-8.MOTOR (CAPSTAN/REEL) (M901) 3-9.HOLDER (FS) SECTION 1two screws (M1.4) 2motor (capstan/reel) (M901) 1two screws (IB lock) 2boss 3lock lever (B) (/M) 7bracket (cassette) assy (/M) 5lock lever (S) (/M) 4screw (M1.4) 6boss 9Remove the holder (FS) section to direction of the arrow. 8Remove six solders of flexible board. ? ? ? ? ? ? ? ? ? ? WM-EX527 1111 3-10. PINCH LEVER (N) ASSY, PINCH LEVER (R) ASSY 1 claw 2 Remove the pinch lever (R) assy to direction of the arrow. 4 Remove the pinch lever (N) assy to direction of the arrow. 3 claw 3-11. MAGNETIC HEAD (PLAYBACK) (HP901) 1claw 2Remove the magnetic head (HP901) to direction of the arrow. 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.The adjustments should be performed with the rated power supply voltage (1.3 V) unless otherwise noted. TORQUE MEASUREMENT ModeTorque MeterMeter Reading 1.57 2.45 mNm FWDCQ-102C(16 25 gcm) (0.23 0.34 ozinch) FWD 0.049 0.147 mNm Back Tension CQ-102C(0.5 1.5 gcm) (0.007 0.02 ozinch) 1.57 2.45 mNm REVCQ-102RC(16 25 gcm) (0.23 0.34 ozinch) REV 0.049 0.147 mNm Back Tension CQ-102RC(0.5 1.5 gcm) (0.007 0.02 ozinch) more than 4.90 mNm FF, REWCQ-201B(more than 50 gcm) (more than 0.7 ozinch) SECTION 4 MECHANICAL ADJUSTMENTS SECTION 5 ELECTRICAL ADJUSTMENTS TAPE SPEED ADJUSTMENT Setting: PRECAUTION 1.Specified voltage: 1.3 V (DC) 2.Switch setting SOUND (NORM/MB/GRV): NORM (normal) AVLS: OFF BL SKIP: OFF MODE: s VOLUME: MAX HOLD: OFF TEST TAPE Procedure: 1.Playback WS-48A (tape center) in the FWD state. 2.Adjust RV601 so that the frequency counter reading becomes 3,000 Hz. Specificated Value: 2,970 to 3,030 Hz 3.Check that deflection of the frequency counter reading between the beginning and the end of tape is within 1.5% (apporox. 45 Hz). 4.Playback WS-48A (tape center) in the REV state. Check that the frequency counter reading is within 2% (approx. 60 Hz) of the reading of step 1. Adjustment Location: TypeSignalUsed for WS-48A3 kHz, 0 dBTape Speed Adjustment + set Test tape WS-48A (3 kHz, 0 dB) frequency counter 16 i jack (J301) RV601 MAIN Board (Side B) ? ? ? ? ? ? ? ? ? ? WM-EX527 1111 3-10. PINCH LEVER (N) ASSY, PINCH LEVER (R) ASSY 1 claw 2 Remove the pinch lever (R) assy to direction of the arrow. 4 Remove the pinch lever (N) assy to direction of the arrow. 3 claw 3-11. MAGNETIC HEAD (PLAYBACK) (HP901) 1claw 2Remove the magnetic head (HP901) to direction of the arrow. 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.The adjustments should be performed with the rated power supply voltage (1.3 V) unless otherwise noted. TORQUE MEASUREMENT ModeTorque MeterMeter Reading 1.57 2.45 mNm FWDCQ-102C(16 25 gcm) (0.23 0.34 ozinch) FWD 0.049 0.147 mNm Back Tension CQ-102C(0.5 1.5 gcm) (0.007 0.02 ozinch) 1.57 2.45 mNm REVCQ-102RC(16 25 gcm) (0.23 0.34 ozinch) REV 0.049 0.147 mNm Back Tension CQ-102RC(0.5 1.5 gcm) (0.007 0.02 ozinch) more than 4.90 mNm FF, REWCQ-201B(more than 50 gcm) (more than 0.7 ozinch) SECTION 4 MECHANICAL ADJUSTMENTS SECTION 5 ELECTRICAL ADJUSTMENTS TAPE SPEED ADJUSTMENT Setting: PRECAUTION 1.Specified voltage: 1.3 V (DC) 2.Switch setting SOUND (NORM/MB/GRV): NORM (normal) AVLS: OFF BL SKIP: OFF MODE: s VOLUME: MAX HOLD: OFF TEST TAPE Procedure: 1.Playback WS-48A (tape center) in the FWD state. 2.Adjust RV601 so that the frequency counter reading becomes 3,000 Hz. Specificated Value: 2,970 to 3,030 Hz 3.Check that deflection of the frequency counter reading between the beginning and the end of tape is within 1.5% (apporox. 45 Hz). 4.Playback WS-48A (
