sony_wm-ex500_ex505_ver1.2.pdf

SERVICE MANUAL CASSETTE PLAYER AEP Model WM-EX500/EX505 E Model WM-EX505 Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeMT-WMEX505-162 SPECIFICATIONS WM-EX500/EX505 Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol ; are trade- marks of Dolby Laboratories Licensing Corporation. Photo: WM-EX505 Frequency response (Dolby NR off (WM-EX505) Playback: 30 - 18,000 Hz Output Headphones (i jack) Load impedance 8 - 300 ohms Power requirements 1.5 V One R6 (size AA) battery Dimensions (w/h/d) Approx. 78.7 x 109.7 x 28.1 mm, incl. projecting parts and controls Mass Approx. 145 g Approx. 200 g (incl. a battery and a cassette) Supplied accessories Stereo headphones or earphones with remote control (1) (WM-EX505) Stereo headphones or earphones (1) (WM-EX500) Design and specifications are subject to change without notice. Battery life (Approx. hours)(EIAJ*) Sony alkaline LR6 (SG) Tape playback35 * Measured value by the standard of EIAJ (Electronic Industries Association of Japan). (Using a Sony HF series cassette tape) Note The battery life may shorten depending on the operation of the unit. Ver 1.2 2002. 01 9-927-634-12Sony Corporation 2002A0500-1Personal Audio Company C 2002.1Published by Sony Engineering Corporation 2 TABLE OF CONTENTS 1.SERVICING NOTES.3 2.GENERAL.5 3.DISASSEMBLY.6 4.MECHANICAL ADJUSTMENTS. 12 5.ELECTRICAL ADJUSTMENTS. 12 6.DIAGRAMS 6-1.Block Diagram . 13 6-2.Printed Wiring Board . 15 6-3.Schematic Diagram . 17 6-4.IC Pin Function Description . 22 7.EXPLODED VIEWS. 24 8.ELECTRICAL PARTS LIST. 26 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 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 AMS button (S704) or the REW AMS but- ton (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 the REPEAT button (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 the REPEAT button (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 the REPEAT (S703),x(S702), FF AMS (S704), and REW AMS (S705) buttons on the remote control- ler as much as possible. 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. n N + square wave (sine wave) 10 Hz, 3.5 dB MAIN Board (Side B) TAPE DETECT switch (S901-1) ATS switch (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 AMS (S705) YREPEAT (S703) FF AMS (S704) AF oscillator n N n N 4 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 SECTION 2 GENERAL This section is extracted from instruction manual. OPEN OPEN YREPEAT x REW(AMSAVLS) FUNCTION SOUND VOL HOLD FF (AMS BL SKIP/s) BA BATT VOL REW FF Yx YREPEAT x;NR FF (AMS BL SKIP/s) REW (AMSAVLS) FUNCTION SOUND VOL HOLD HOLD Plug in firmly. Branchez fermement. (WM-EX500) (WM-EX505) 6 This set can be disassembled in the order shown below. SECTION 3 DISASSEMBLY CASE ASSY Note: Follow the disassembly procedure in the numerical order given. Set Lid Assy, Cassette Main Board/Note for Installation Holder (FS) Assy Lever (N/R) Assy, PinchHead, Magnetic (HP901) Belt Motor (Capstan/Reel) (M901) Ornament Assy Case AssyHolder, Battery 2case assy 1two screws (M1.4 2.0) 1screw (M1.4 2.0) Ver 1.2 7 LID ASSY, CASSETTE ORNAMENT ASSY 1three screws (M1.4 3.0) 1two screws (M1.4 3.0) 2lid assy, cassette 1 two claws 2 ornament assy 1 claw knob (hold) S707 On installation reel ornament, adjust the S707 and knob (hold). Ver 1.2 8 HOLDER, BATTERY BELT 2 two screws (M1.7 4.5) 3 battery holder 1 Break the soldering of battery terminal (+). 1 Break the soldering of battery terminal (). 1 belt (See page 4) 9 MAIN BOARD NOTE FOR INSTALLATION MAIN BOARD 2 screw (M1.4 2.0) flexible board 1 Remove six solders of flexible board. 1 Remove two solders of plunger solenoid. 1 Remove four solders of motor. 1 Remove four solders of leaf switch. 3 MAIN board slider (NRA) S701 On installation MAIN board, adjust the S701 and slider (NRA).MAIN board 10 MOTOR (CAPSTAN/REEL) (M901) HOLDER (FS) ASSY 1 two screws (M1.4 1.4) 2 boss 3 lock lever (B) 7 bracket (cassette) assy 5 lock lever (S) 4 screw (M1.4) 6 boss 9 Remove the holder (FS) assy to direction of the arrow. 8 Remove six solders of flexible board. 1 two screws (M1.4) 2 motor (M901) 11 LEVER (N/R) ASSY, PINCH HEAD, MAGNETIC (HP901) 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 1 claw 2 Remove the magnetic head to direction of the arrow. 12 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 Procedure: PRECAUTION 1.Specified voltage: 1.3 V (DC) 2.Setting BL SKIP: OFF SOUND NORM/MB/GRV : NORM AVLS: OFF ;NR (WM-EX505 only): OFF Test tape 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). Adjustment Location: TypeSignalUsed for WS-48A3 kHz, 0 dBTape Speed Adjustment + set Test tape WS-48A (3 kHz, 0 dB) frequency counter 16 i REMOTE jack (J301) RV601 J301 MAIN Board (Side B) WM-EX500/EX505 13 14 SECTION 6 DIAGRAMS 6-1.BLOCK DIAGRAM + PREAMP AMS AGC DET COMPARATOR IC704 BEEP V/I EQ METAL CONTROL SPEED CONTROL DIRECTION CONTROL PHOTO REFLECTOR SWITCH NR (EX505) S702 706, 708 WM-EX500/EX505 C202 C305 1 3 5 4 C708 C102 R712 R212 R211 R717 R111 R112 C711 R726 D711 IC703 IC702 IC302 IC301 D710 AK AK C608 C606 C307 C308 C312 C105 C206 C106 R721 R734R737 R725R723 R736 R722 R735 R720 R733 R714 R739 R210 JC702 R301 C317 R213 R113 R307 C703 C207 C304 C205 C107 R732R731 C601 R601 R724 R603 R604 R623 R624 R622 R701 R703 R702 R309R110 C318 + C310 + C201 + C101+ C301+ C702 + C701 + CB301 2413 37 36 25 1 12 48 IC701 111 23 22 12 34 44 33 C303+ Q304 Q301 D702 AK THP601 05 S701 (DIRECTION) C314 + C313+ C306+ C322 + R302 R707 R605 R705 R704 R711 R727 R306 R114 R214 R205 R107R206R106 R305 R304 R303 R108 R207 R602 C607 C605 C323 C321 C233 C133 C709 C710 C320 C203 C302 C104 C204 C319 C209 R715 R708 R738 R716 R308 JC201 JC101 R718 R750 R728 R710 JC701 R706 R713 R740 R719 R105 R208 R150 FB101 R250 FB201 R203 R202 R103 R104 R204 R201 R102 R101 C603 C604 C602 C311 C109 C108 C103 C316 C309 C208 IC704 IC601 D709 Q303 D701 AK D704 RV601 1 10 W COM U V 20 11 X701 + Q702 B C E Q701 B C E 2B 71 814 (EX500) (EX505) E 1C 2C 1C B C E S707 HOLD HOLD OFF RV301 VOL 2 1 J301 i REMOTE MAIN BOARD (SIDE A) MAIN BOARD (SIDE B) 1 3 5 4 L701 1-676-381-(11) 11 1-676-381-(11) 11 FWD CENTER REW BE C (FRENCH) EXCEPT FRENCH EXCEPT FRENCH (EX500) (EX505) (EX505) (EX505) (EX505) S704 FF AMS S705 REW AMS D706 BL SKIP/s S708 FUNCTION S706 SOUND D705 AVLS S702 D703 BATT TP36 (PHOTO IN) 1 3 5 4 TP46 (GND) (CHASSIS) DRY BATTERY SIZE “AA” (IEC DESIGNATION R6) 1PC.1.5V PM901 (PLUNGER) S901-1 (TAPE DETECT) S901-2 (ATS) BP701 K K K K A M901 CAPSTAN/ REEL PH701 1 2 3 4 5 6 1 2 3 4 5 6 REW L-CH HP901 (PLAYBACK) L-CH R-CH R-CH FWD 1 A 234567891011121314151617 B C D E F G H I J K L GND REMO DATA VCC REPEAT S703 Y NR 15 16 6-2.PRINTED WIRING BOARD D701E-16 D702I-8 D703H-13 D704G-13 D705F-12 D706E-13 D709C-16 D710C-1 D711C-1 IC301C-6 IC302C-4 IC601J-13 IC701F-4 IC702H-8 IC703D-2 IC704H-11 PH701I-4 Q301B-6 Q303C-15 Q304C-3 Q701G-4 Q702J-4 Semiconductor Location Ref. No.Location Note on Printed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor side. z: Through hole. f: internal component. b : Pattern from the side which enables seeing. (The other layers patterns are not indicated.) Caution: Pattern face side:Parts on the pattern face side seen from (Side B)the pattern face are indicated. Parts face side:Parts on the parts face side seen from (Side A)the parts face are indicated. WM-EX500/EX505 17 18 19 6-3.SCHEMATIC DIAGRAM See page 20 for IC Block Diagrams. Waveforms 1 IC702 4 LX 1 V/DIV, 5 s/DIV 3 Vp-p 10 s 2 IC601 5 OSC, IC701 5 OSC IN 20 mV/DIV, 1 ms/DIV 23.2 mVp-p 1.7 ms 3 IC701 wj X1 500 mV/DIV, 100 ns/DIV 2.1 Vp-p 250 ns Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. %: indicates tolerance. f: internal component. C : panel designation. U : B+ Line. H : adjustment for repair. Total current is measured with a cassette installed. Power voltage is dc 1.5 V and fed with regulated dc power supply from battery terminal. Voltages and waveforms are dc with respect to ground in playback mode. no mark : PLAYBACK Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal produc- tion tolerances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal produc- tion tolerances. Circled numbers refer to waveforms. Signal path. E: PLAYBACK 20 21 22 6-4.IC PIN FUNCTION DESCRIPTION IC Block Diagrams IC301TA2123AF (EL) IC302NJM2185AV-TE2 IC702XC6371C251PL PRE APRE B MIX PW B PW A PW C BST MT TC BASE RF IN PW GND OUT B OUT C OUT A VCC RF OUT VREF OUT BST NF BST OUT PW IN C LPF EQ A PW NF A PW IN A PW IN B PW NF B 3 IN A-R 5 PRE NF-A 6 PRE OUT A 7 MTL DRV A 8 MTL DRV B 9 PRE OUT B 10 PRE NF-B 11 AMS IN 12 IN B-R 4 IN B-F 2 IN A-F 1 21 20 19 18 17 GND16 AMS DET15 AMS MIX14 AMS SW13 22 23 24 38 C-AMP SW37 PW SW42 MT SW41 F/R SW44 BST SW43 M/N SW46 PRE GND47 VREF IN48 PRE SW45 AMS OUT40 BEEP39 262728293031323334 DET 36 AGC IN 35 + + + + + + EQ B 25 RIPPLE FILTER AGC DET BEEP VREF SWITCH COMPARATOR MTL DRV 8910141312 213 A-CH BLOCK 11 7654 G2G1V/I WEIGHT BIAS CIRCUIT + + GM SUM V+ SW VEXT OUTA DCA DETA INA GND IREF VREF OUTB DCB DETB INB B-CH BLOCK: SAME AS A-CH. V1 PW2 W3 GND4 OSC5 DR6 VREF7 START8 VSP9 IN+10 PV20 U19 PU18 GND17 VCC16 FC15 TC114 TC213 R112 OUT11 MOTIVE CONTROL CIRCUIT MOTIVE/ OSC MOTIVE LOGIC SOFT SWITCH PRE DRIVER INVERTER BIAS REFERENCE VOLTAGE SPEED CONTROL CURRENT CONTROL OUTPUT BIAS + IC601MM1279XVBE 1 2 3 5 4 CHIP ENABLESLOW START PHASE COMP VLX LIMITER PWM CONTROL OSC 50/100/180kH