索尼SONY WM-EX500电路图.pdf
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1、MICROFILM 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” a
2、nd 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) Appr
3、ox. 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
4、 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
5、. Ver 1.0 2000. 01 ? ? ? ? ? ? ? ? ? ? 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.EXPLO
6、DED 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 sold
7、ering 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 PH7
8、01 (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 wit
9、h 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 MAI
10、N 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 t
11、o 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
12、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 p
13、osition. 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 sta
14、te 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
15、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
16、), 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
17、 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 (P
18、HOTO 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
19、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)
20、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
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