Sony wm fx 888 service manual
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Extracted text from sony wm fx 888 service manual (Ocr-read)
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2 WM-FX888 Note on the AC power adaptor Use only the supplied AC power adaptor. Do not use any other AC power adaptor. Polarity of the plug TABLE OF CONTENTS 1. SERVICING NOTES ............................................... 3 2. GENERAL ................................................................... 5 3. DISASSEMBLY 3-1. Disassembly Flow ........................................................... 6 3-2. Case Section .................................................................... 6 3-3. MAIN Board ................................................................... 7 3-4. Belt (F2) .......................................................................... 7 3-5. Motor (Capstan/Reel) (M601) ........................................ 8 3-6. Cassette Lid Sub Assy ..................................................... 8 3-7. Reel Ornament Block Assy ............................................. 9 3-8. Holder (F) Assy (/M) ...................................................... 9 3-9. Pinch Lever (RA)/(NA) Assy ......................................... 10 3-10. Magnetic Head (Playback) (HP901) .............................. 10 4. MECHANICAL ADJUSTMENTS ....................... 11 5. ELECTRICAL ADJUSTMENTS ......................... 11 6. DIAGRAMS 6-1. Block Diagram – TUNER Section – ............................. 13 6-2. Block Diagram – MAIN Section – ................................ 14 6-3. Note for Printed Wiring Board and Schematic Diagrams ................................................ 15 6-4. Printed Wiring Board – MAIN Board (Side A) – ......... 16 6-5. Printed Wiring Board – MAIN Board (Side B) – ......... 17 6-6. Schematic Diagram – MAIN Board (1/2) – .................. 18 6-7. Schematic Diagram – MAIN Board (2/2) – .................. 19 6-8. IC Pin Function Description ........................................... 21 7. EXPLODED VIEWS 7-1. Case Section .................................................................... 23 7-2. Chassis Section ............................................................... 24 7-3. Main Section ................................................................... 25 7-4. Mechanism Deck Section-1 (MF-WMFX671-162) ....... 26 7-5. Mechanism Deck Section-2 (MF-WMFX671-162) ....... 27 7-6. Mechanism Deck Section-3 (MF-WMFX671-162) ....... 28 8. ELECTRICAL PARTS LIST ............................... 29Notes 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 0 OR DOTTED LINE WITH MARK 0 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.
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3 WM-FX888 SECTION 1 SERVICING NOTES This set detects the rotation of the idler gear (A) (side S) using the PH1 (photo reflector). The PH1 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 (M601) cannot be controlled, causing malfunction. Further, the DIRECTION switch (S1) is also mounted on the MAIN board, and with the board removed, the mechanism position can- not 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 (M601) 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 Q15-1 (COLLECTOR) and the TP23 (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 (S1) are set to the center position. If not, set the preset state as follow. (2) Move the DIRECTION switch (S1) 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 (S1) 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 Q15-1 (COLLEC- TOR) and the TP23 (GND). (3) Press the [ RADIO OFF] button (S3) to set the STOP mode. (4) Press the [+ FF] button (S4) or the [-- REW] button (S5). 4. PLAY mode (1) Check that the preset state is set. (2) Input the square wave or sine wave to the Q15-1(COLLEC- TOR) and the TP23 (GND). (3) Press the [ RADIO OFF] button (S3) to set the STOP mode. (4) Press the [ REPEAT] button (S9) will move the slider (NR) once towards the side R and then to the side F. Move the DIRECTION switch (S1) according to this timing will set the PLAY mode (side F). Press the [ REPEAT] button (S9) another time and move the DIRECTION switch (S1) 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] (S9) , [ RADIO OFF] (S3), [+ FF] (S4), and [-- REW] (S5) buttons on the remote controller 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 (S1) can be determined from the beep sound. + – + FF (S4)connect to the plunger (PM901) battery terminal #battery terminal 3 square wave (sine wave) 10 Hz, – 3.5 dBAF oscillator TAPE DETECT (S901-1) – MAIN Board (side B) – ATS (S901-2) – REW (S5) TP23 (GND) S1 DIRECTION FWDTSTOPtREV Y REPEAT (S9) x RADIO OFF (S3)PH1Q15 connect to the motor (M601) xx Y Y Yx