sony_wm-gx612-gx614.pdf

1 AEP Model UK Model E Model Australian Model SPECIFICATIONS SERVICE MANUAL WM-GX612/GX614 Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeMF-WMGX614-112 RADIO CASSETTE CODER Photo : WM-GX614 Ver 1.1 2002. 01 Sony Corporation Personal Audio Company Published by Sony Engineering Corporation 9-960-414-12 2002A1600-1 2002.1 2 Section Title Page SECTION 1. SERVICE NOTE.3 SECTION 2. GENERAL .5 SECTION 3. DISASSEMBLY 3-1.Cassette Lid ASSY and Case ASSY . 7 3-2.Bracket ASSY and Cassette Holder ASSY . 7 3-3.Tuner Board . 8 3-4.Main Board. 8 SECTION 4. MECHANICAL ADJUSTMENT.9 SECTION 5. ELECTRICAL ADJUSTMENT .9 SECTION 6. DIAGRAMS 6-1.IC Pin Functions IC501 BA3641FV REC AMP . 11 IC701 MSM63120B System Control . 11 IC702 SMC62L3A LCD Drive .13 6-2.Printed Wiring Board Tuner Section . 14 6-3.Schematic Diagram Tuner Section . 17 6-4.Schematic Diagram Main Section . 21 6-5.Printed Wiring Board Main Section . 25 6-6.IC Block Diagrams . 29 SECTION 7. EXPLODED VIEWS 7-1.Case Section . 33 7-2.Main Board Section . 34 7-3.Mechanism Section (MF-WMGX614-112). 35 SECTION 8. ELECTRICAL PARTS LIST.36 TABLE OF CONTENTS 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 PUBLISHED BY SONY. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C during 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 solder- ing or unsoldering. 3 MAIN Board Side A Side B Lever (FR SW) SECTION 1 SERVICE NOTE Service Mode Mode which enables the mechanism to be operated with the MAIN board opened. Photo sensor PH701 mounted on the MAIN board is used to detect rotaion of the reels. Because it is mounted on the MAIN board, when the MAIN board is being removed, rotation of the reels cannot be detected and the auto-off/tape-end detector circuit does not operate correctly. F/R switch (S701) is also mounted on the MAIN board. Therefore, without the MAIN board, the head cannnot be placed in playback position, and power cannot be supplied to the circuitry of the playback system. When the MAIN board is being removed, follow the procedures below, in order to check operation of the mechanisms of the tape deck and to check voltages supplied to each circuit. 1. Setting 1) Refer to “Disassembly” and remove the cabinet and open the MAIN board. 2) Connect the MAIN board to the motor and plunger using a jumper wire. Use “Extension tool (1-769-143-11) (one set 10 tools)” to make connection simple. 3) Short-circuit the service mode land (BP2) by soldering. 4) Apply a square wave signal to TP20. (See the figure on the right.) 5) Supply 1.5V to the battery terminals (+) and () using a DC power supply. 2. Preset State This state must be set to set the PLAY, FF, and REW modes. 1) Check that the lever (FR SW) is at the center and F/R switch (S701) is at the center. If not, set the preset state as follows. 2) Move the F/R switch (S701) according to the side faced by the lever (FR SW). 3) Turn OFF the DC power supply switch once and then turn it ON again so that the lever (FR SW) can be moved. Move the F/R switch (S701) according to this timing and set to the center. 3. FF REW Mode 1) Set the preset state and press the FF switch and REW switch. 4. PLAY Mode 1) Set the preset state. 2) Press the switch. The lever (FR SW) will move to the F side once and then to the R side. Move the F/R switch (S701) according to this timing to set the PLAY (R side) mode. Press the switch another time and move the F/R switch (S701) according to the movement of the lever (FR SW) to set the PLAY (F side) mode. Note 1 : If the above cannot be performed, start again from preset. Note 2 : Use the remote control , &, FF, and REW switches as much as possible. If the remote control is not available, do not touch S703 to S706 with the hand and use something with a round tip to press them. F side R side Center Lever (FR SW) Center F side R side S701 F/R SWITCH (FWD n STOP n REV) PH701 S702 (HOLDER SWITCH) S714 (C HOLD) S707 (RADIO ON BAND) S711 (TUNING +) S712 (TUNING ) S713 (ENTER) Connect to plunger S703 (RADIO OFF p) S704 (REPEAT ) Battery Terminal () S709 (SET) S710 (MENU) S706 (AMS REW PRESET ) Service mode land S705 (AMS FF PRESET +) Connect to motor Battery Terminal (+) TP20 AF OSCILLATOR SQUARE WAVE (SINE WAVE) 10Hz 3.5 dB (1.5V) 4 Rotation system during REW. Rotation system Rotation system during PLAY. Capstan wheel (N) assembly Clutch assembly Gear (K) Gear (A) Gear (NR) Pulley (REVERSE) Gear (B) Reel table (T side) Clutch assembly Motor pully Gear (C) Reel table (S side) Gear (A) Capstan wheel (R) assembly Gear (K) Gear (NR) (REV : Left side/ FWD : Right side) Rotation system during FF. Capstan wheel (N) assembly Pulley (REVERSE) Capstan wheel (N) assembly Reel table (T side) Gear (B) Gear (NR) (REW : Left side) Motor pully Clutch assembly Gear (FR) (FF : Right side) Reel table (S side) Gear (K) Gear (NR) Capstan wheel (R) assembly Pulley (REVERSE) Motor pully Gear (C) Capstan wheel (R) assembly 5 SECTION 2 GENERAL 1Display Window 2PRESET +/AMS FF button 3PRESET /AMS REW button 4MENU button 5BATT indicater 6SET button 7p/RADIO OFF button 8ENTER button 92/REMOTE jack ILLUST LATION : WM-GX614 MODEL !2 FUNCTION OF CONTROL 1 0HOLD knob !VOLUME knob !RADIO ON/BAND button !TUNIG + button !TUNIG button !/REPEAT button !REC switch !ISS switch !MIC jack ! 0 ! 98! 7654!3 6 This section is extracted from instruction manual. 7 Note : Follow the disassembly procedure in the numerical order given. 3-1. CASSETTE LID ASSY AND CASE ASSY 3-2. BRACKET ASSY AND CASSETTE HOLDER ASSY 1Screw (M1.4) 2Bracket ASSY 4Lock lever (B) 5Screw (M1.4) 3Screw (M1.4) 6Cassette holder ASSY SECTION 3 DISASSEMBLY 1Two screws (M1.4x3) 2Screw (M1.4x3) 4Case ASSY 5TU flexible board 6Two screws (M1.4x2) 7Cassette lid ASSY 8Reel ornament ASSY 9Mechanism Block 3Two screws (M1.4x2) Note : Adjust the knob and the switch position when installing. 8 3-3. TUNER BOARD 3-4. MAIN BOARD 1 Three tapping screws 2 TU cover 3 TUNER board 4 Case ASSY Note for installation 2Remove the solder of the plunger solenoid. 3Flexible board (Head) 4Remove the solder of the ATS flexible board. 5Tapping screw 6Tapping screw 7Screw (M1.4x2) 8Remove the Main board direction of arrow. Lever (FR switch) Note :Confirm if the switch lever installs it self in the groove of a lever (FR switch) for assembling. 1Remove the solder of the motor. S701 9 SECTION 4 MECHANICAL ADJUSTMENT Mode FWD Torque MeterMeter Reading FWD Back tension REV REV Back tension CQ-102RC CQ-102C CQ-201B FF REW 18 33 g cm 0.5 3.0 g cm 18 33 g cm 0.5 3 g cm More than 40 g cm SECTION 5 ELECTRICAL ADJUSTMENT PRECAUTION 1. Before adjusting, clean the following parts with a piece of cotton moistened with alcohol. playback headpinch roller rubber beltcapstan 2. Demagnetize the playback head using a head demagnetizer. 3. Do not use a magnetized screwdriver for adjustments. 4. After adjusting, apply screw-locking compound onto the adjusted parts. 5. Unless specified otherwise, use a specified voltage (1.3V) to perform the adjustments. Torque Measurement PRECAUTION 1. Specified voltage : 1.3V. 2. Switch position DOLBY NR switch : OFF MEGA BASS switch: NORM AVLS: OFF CASSETTE SECTION Test tape Tape Speed Adjustment Procedure : 1. Playback WS-48A (tape center part) in the FWD state and adjust RV601 so that the frequency counter reading becomes 3000 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. Adjustment Point : MAIN BOARD Component side Test tape WS-48A (3kHz, 0dB) PHONES jack 3 kHz, 0 dBTape Speed AdjustmentWS-48A RV601 frequency counter S714 (HOLD) TypeSignalUsed for IC601 16 set 10 TUNER SECTION AM BAND switch : AM NOTE:The adjustment should be performed setting the area indication to “Eur”. (Refer to “Receiving Stations Outside Your Country” on page 6.) After the adjustment, reset the area indication as it was. AM RF SSG Put the lead-wire antenna close to the set. 30% amplitude modulation by 400Hz signal output level : as low as possible FM BAND switch : FM FM RF SSG 0.01F to ANT (TP1) 22.5kHz frequency deviation by 400Hz signal. output level : as low as possible VTVM Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. AM VT VOLTAGE ADJUSTMENT 1.5 V T1531 kHz AM IF ADJUSTMENT Adjust for a maximum reading on VTVM. T2450 kHz AM TRACKING ADJUSTMENT Adjust for a maximum reading on VTVM. L5 CT1 621 kHz 1,395 kHz FM IF ADJUSTMENT Adjust for a maximum reading on VTVM. L310.7 MHz PHONES FM VCO Adjustment Procedure : 1. Connect frequency counter to the positions shown below. 2. Tune the to 98 MHz. 3. Adjust RV1 for 19 kHz 100Hz reading on the frequency counter. Adjustment Parts Location TUNER BOARD Component side FM RF SSG 0.01F Carrier frequency : 98MHz Modulation: no modulation output level: 0.1V (100dB) to ANT (TP1) 1F 100k frequency counter L5 : AM TRACKING TP1 T2 : AM IF T1 : AM VT RV1 : VCO L3 : FM IF CT1 : AM TRACKING IC2 Pin 9 TP23 TP23 (IC2 Pin !) 32 set 11 SECTION 6 DIAGRAMS TAU STBY MIC MUTE REC IN2 REC IN1 MIC OUT1 MIC OUT2 Vref MIC IN2 MIC IN1 RF Vcc +B base RNF REC OUT1 REC OUT2 MONI OUT1 MONI OUT2 GND ALC detect output IC power switch Mic amp mute control REC amp monitor amp input REC amp monitor amp input Mic amp output Mic amp output Reference voltage input Mic amp input Mic amp input Ripple filter voltage input Power supply 2.5V Power supply 1.5V Regulator control Regulator nagative feedback REC amp output REC amp output Monitor amp output Monitor amp output GND (sub terminal) Pin No.Pin NameI/OFunction 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 I/O I I I I I/O I/O I I I I I I O I I/O I/O I/O I/O I BEEP DDC CTL MUTE F/R DOLBY DBB ON/OFF DBB MID/MAX AVLS PRE SW AMP CTL REC CTL PHOTO CTL LED CTL PL CTL M-CTL M-DIR Beep signal output (TC system=1.6 kHz, CF system=3.0 kHz) ON/OFF control output of DC-DC converter and amplifier (when DDC on=L) Audio muting control output (when MUTE ON=L) Head select output (when FWD=H, when REV=L) DOLBY ON/OFF control output (when DOLBY ON=L) Tone control output (when DBB ON=H) Tone control output (when DBB ON=L) AVLS ON/OFF control output (when AVLS ON=L) TC/RADIO select output of preamplifier (when TC=L, when RADIO=H) Audio amplifier control (when AMP ON=H) REC control output (when REC=H) Output for rotation detect intermittent LED control output (when LED ON=H) Plunger control output Motor control output Motor rotating direction control output 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 O O O O O O O O O O O O O O O O Pin No.Pin NameI/OFunction IC701 MSM63120B SYSTEM CONTROL 6-1. IC PIN FUNCTIONS IC501 BA3641FV REC AMP 12 M-BRK TEST OSC2 OSC1 VDD XTB XT VSS1 VSS2 VCM VCP VSSL CMP1 CMP2 KEY1 KEY2 MODE2 A/B HOLDER FWD SW REV SW RMUM RQT DRQT TI TCLK TO RO RCLK CE CS VDD RADIO CTL AMS IN MODE1 N-TUME R-TUME SET STOP RESET Motor brake control (not used) Test pin (open) Resistor connect pin for CR oscillator (800 kHz). (open) Resistor connect pin for CR oscillator (800 kHz). (open) Power supply connect terminal Crystal oscillator connect terminal Crystal oscillator connect terminal Power supply connect terminal Internal power supply step-up terminal Internal power supply step-up terminal Internal power supply step-up terminal Internal power supply step-up terminal Rotation detect input Rotation detect input Key input Key input Mode select input (connect to GND) Tape A/B side detection switch input (connect to GND) Holder keying switch (close=L) MD mode switch (when FWD PLAY=on) MD mode switch (when REV PLAY=on) With No remote commander (with=H) Data request of LCD driver Communication request output to the remote commader. Communication to PLL/EEPROM Communication to PLL/EEPROM Communication to PLL/EEPROM Communication to the remote commander Connect to GND Communication to the remote commander Communication to PLL Communication to EEPROM Power supply connection terminal Radio control output (when RADIO=H) Recording sound detection input (with music=H) Mode select input (connected to GND) Erasing error detect (FWD) (fixed at “H”) Erasing error detect (REV) (fixed at “H”) For power failure stop Reset terminal Pin No.Pin NameI/OFunction 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 O I I I I I I I I I I I I/O I O O O I O O O O I I I I I I 13 Pin No.Pin NameI/OFunction COM2 COM3 SEG0 SEG1 SEG2 SEG3 SEG4 SEG6 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 TEST RCLK RDATA NC RESET INT HOLD SW HOLD KEY RQT VSS VDD OSC1 OSC2 VS1 CA CB CC VL1 VL2 VL3 COM0 COM1 LCD common signal output LCD common signal output LCD segment signal output (not used) (open) LCD segment signal output (not used) (open) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 O O O O O O O O O O O O O O O O O O O O I I I O I I I I I I O O O O (I) (I) I O O O O O O O Test signal input (connect to GND) Not used (open) Clock input for receiver Not used (open) Data input for receiver Not used (open) Reset signal input Interruptt signal input for receiver Hold switch signal input Input terminal at key pressing in HOLD condition Not used (open) Retransmission Request output Not used (open) Not used (open) Not used (open) Power supply minus terminal Power supply plus terminal CR oscillator input CR oscillator output Regulator output Step-up capacitor connection terminal Regulator output of LCD system Step-up output of LCD system Step-up output of LCD system Common output of LCD system Common output of LCD system IC702 SMC62L3A