Sony-TCTX333-tape-sm维修电路原理图.pdf

1 TC-TX333 MICROFILM US Model AEP Model UK Model E Model Tourist Model SERVICE MANUAL SPECIFICATIONS Recording system4-track 2-channel stereo Frequency response(DOLBY NR OFF) 50 14,000 Hz ( 3 dB), using Sony TYPE I cassettes 50 15,000 Hz ( 3 dB), using Sony TYPE II cassettes InputTAPE IN (phono jacks): impedance 47 kilohms OutputTAPE OUT (phono jacks): voltage 550 mV impedance 47 kilohms General Power requirements US model:120 V AC, 60 Hz AEP, UK model:220 230 V AC, 50 / 60 Hz E, Tourist model:110 120 V or 220 240 V AC, 50 / 60 Hz Adjustable with the voltage selector Power consumption12 W DimensionsApprox. 215 60 195 mm (w / h / d) incl. projecting parts and controls MassApprox. 2.5 kg Supplied accessories:Audio connecting cords (2) Design and specifications are subject to change without notice. Model Name Using Similar MechanismTC-TX313/TX515 Tape Transport Mechanism Type TC-TX333 is the stereo cassette deck that can be used only with section DHC-MD333. STEREO CASSETTE DECK 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 dam- aged by heat. Dolby noise reduction manufactured under license from Dolby Labo- ratories Licensing Corporation. “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. RadioFans.CN 收音机爱 好者资料库 2 TABLE OF CONTENTS 1. GENERAL Parts and Controls. 3 2. TEST MODE 2-1. Checking the Items of Test Mode . 4 3. DISASSEMBLY 3-1. Top Cover. 5 3-2. Front Panel Assy . 5 3-3. Front Board . 6 3-4. Back Plate . 6 3-5. Bracket (Power Trans). 7 3-6. Main Board . 7 3-7. TCM Assy . 8 3-8. Deck Board. 8 3-9. Lever. 9 3-10. Tension Spring. 9 3-11. Housing . 10 3-12. Chassis . 10 3-13. Motor (A)/(B) Assy . 11 3-14. Head Plate . 11 3-15. Pinch Roller Assy. 12 3-16. Bracket (Head Unit) . 12 4. MECHANICAL ADJUSTMENTS. 13 5. ELECTRICAL ADJUSTMENTS. 13 6. DIAGRAMS 6-1. Circuit Boards Location . 16 6-2. Printed Wiring Board Deck Section. 17 6-3. Schematic Diagram Deck Section. 18 6-4. Printed Wiring Boards Main Section . 20 6-5. Schematic Diagram Main Section. 23 6-6. Printed Wiring Board Front Panel Section. 27 6-7. Schematic Diagram Front Panel Section. 29 6-8. IC Pin Description. 30 7. EXPLODED VIEWS 7-1. Top Cover Section . 32 7-2. Front Panel Section . 33 7-3. Chassis Section . 34 7-4. TCM Assy Section . 35 8. ELECTRICAL PARTS LIST. 36 RadioFans.CN 收音机爱 好者资料库 3 SECTION 1 GENERAL Parts and Controls 1 1 / u (POWER) switch Only the power to this set is turn on. 2 Cassette slot With a cassette inserted, the cassette indicator is illuminated red when the power is turned on. 3 (eject) button 4 (lower side play)/ (upper side play) button Even without cassette, the power to this set and the DHC-MD333 will be turned on when one of these buttons is pressed. 5 (pause) button 6 p (stop) button 7 0/) (fast forward, fast backward/AMS) button 8 r REC (recording) button 9 CD SYNC (CD synchro) button This button allows CD synchro recording to be executed as this set is interlocked with the DHC-MD333. 0 DIRECTION switch ! DOLBY NR (Dolby Noise Reduction) switch Cassette indicator 4 SECTION 2 TEST MODE 2-1. CHECKING THE ITEMS OF TEST MODE The set allows you to check the items of the test mode although this may not be directly related with the adjustment. 1 Setting/Releasing the Test Mode: 1) Setting With 1 / u (POWER) OFF, short between test pin 1 and pin 2 of CN09 on the LOW-VOLTAGE board. (See page 15.) Then, turn 1 / u (POWER) ON to enter the test mode. 2) Releasing Open between pin 1 and pin 2 of CN09. 2 Items of Test Mode 1) Memory Stop 1-1) In side A record mode, press the REW ( 0 ) button. The tape is rewind to the start point of recording and stopped. 1-2) In side B record mode, press the FF ( ) ) button. The tape is rewind to the start point of recording and stopped. 2) Memory Play 2-1) In side A record mode, press the FWD Auto Play ( ” + 0 ) buttons simultaneously. The tape is rewind to the start point of recording and FWD played. 2-2) In side B record mode, press the REV Auto Play ( “ + ) ) buttons simultaneously. The tape is rewind to the start point of recording and REV played. 3) All LED Flickering When no tape is inserted, all LED indicators are flickering. 4) Aging Operation When tape with record erase preventing claw is inserted for both sides A and B, enter the aging operation start command by pressing p and CD SYNC simultaneously. The system will change the direction to one side and perform the following operations: 1 Rewind in REW mode until side A of tape is stopped. 2 Playback tape in FWD mode for 1 minute. 3 Pause mode. 4 Record tape for 3 minutes. 5 Forward tape in FF mode to the end of side A of tape. 6 Shut off and switch to side B. 7 Playback tape in REV mode for 1 minute. 8 Pause mode. 9 Record tape for 3 minutes. ! Forward tape in FF mode to the end of side B of tape. ! Shut off and switch to side A. ! Repeat the procedure from 2 to !. ! Pressing the STOP ( p ) button will release the set from these operations. 5 SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. TOP COVER 3-2. FRONT PANEL ASSY 1 screws (case 3 TP2) 3 top cover 2 screws (case 3 TP2) 1 CN06 2 BVTT 3x8 3 claw 4 claw 5 front panel assy 6 3-3. FRONT BOARD 3-4. BACK PLATE 3 BVTP 3x8 4 claws 1 BVTP 3x10 2 BVTP 3x8 5 back plate 1 BVTP 2.6x8 2 BVTP 2.6x8 3 BVTP 2.6x8 4 FRONT board 6 REC button 5 PLAY button 7 EJECT button 8 POWER button 7 3-5. BRACKET (POWER TRANS) 3-6. MAIN BOARD 1 bind type (A) 2 bracket (power trans) 7 BVTP 3x8 6 BVTP 3x8 5 BVTP 3x10 4 BVTP 3x8 2 REC board 1 PC board holders 8 MAIN board 3 connector 8 3-7. TCM ASSY 3-8. DECK BOARD 2 BVTP 3x10 1 BVTP 3x10 4 TCM assy 3 BVTP 3x10 2 P 2x6 1 connector 3 DECK board 9 3-9. LEVER 3-10. TENSION SPRING 3 BVTP 3x8 1 BVTP 3x8 4 tape guide (R) 2 tape guide (L) 6 Turn the loading motor and down the cassette holder. 5 9 8 7 1 2 10 3-11. HOUSING 3-12. CHASSIS 3 4 2 1 4 belt (B) 5 belt (A) 3 1 2 6 7 8 9 11 3-13. MOTOR (A)/(B) ASSY 3-14. HEAD PLATE 4 motor (B) assy 2 motor (A) assy 1 3 A 3 1 B 2 Note : On install, set the portions A and B. 12 3-15. PINCH ROLLER ASSY 3-16. BRACKET (HEAD UNIT) 3 bracket (head unit) 2 1 2 4 5 3 pinch roller assy (R) 6 pinch roller assy (F) 1 13 PRECAUTION 1.Clean the following parts with a denatured-alcohol-moistened swab : record/playback/erase headpinch roller rubber beltscapstan idlers 2.Demagnetize the record/playback/erase head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.) 3.Do not use a magnetized screwdriver for the adjustments. 4.After the adjustments, apply suitable locking compound to the parts adjusted. 5.The adjustments should be performed with the rated power supply voltage unless otherwise noted. Torque Measurement ModeTorque MeterMeter Reading 35 80 g cm FWD CQ-102C (0.49 1.11 oz inch) FWD1 7 g cm Back tension(0.012 0.097 oz inch) 35 80 g cm REV CQ-102RC (0.49 1.11 oz inch) REV1 7 g cm Back tension(0.012 0.097 oz inch) more than 40 g cm FF, REWCQ-201B (more than 0.56 oz inch) SECTION 5 ELECTRICAL ADJUSTMENTS SECTION 4 MECHANICAL ADJUSTMENTS PRECAUTION 1.The adjustment should be performed in the publication. (Be sure to male playback adjustment at first.) 2.The adjustments and measurement should be performed for both L-CH and R-CH. Switch position DOLBY NR switch : OFF DIRECTION switch : A Standard Input Level Input terminalTAPE IN source impedance10 k input signal level0.49 V ( 4 dB) Standard Output Level Output terminalTAPE OUT load impedance47 k output signal level0.49 V ( 4 dB) Test Tape TypeSignalUsed for WS-48A3 kHz, 0 dBTape Speed Adjustment P-4-L300315 Hz, 0 dBPB Level Adjustment 0 dB = 0.775 V 14 Adjustment Limits : normal speed Reading on frequency counter 2,910 to 3,090 Hz Confirm that the deviation between tape top and tape end is within 3%. Adjustment Location : Capstan motor volume (See page 15.) Sample Value of Wow and flutter W. RMS (JIS) within 0.3% (test tape : WS-48A) Playback Level Adjustment Procedure : 1.Mode: FWD playback 2.Adjust SFR03 (L-CH) and SFR04 (R-CH) on MAIN board so that the reading on level meter meets the adjustment limits below. TAPE IN 315 Hz, 0.49 V ( 4 dB) TAPE IN 1) 315 Hz 2) 10 kHz 43.6 mV ( 25 dB) TAPE OUT Record Bias Adjustment Setting : Set to the TEST mode. (See page 4.) Procedure : 1.Mode: Record frequency counter 47 k set test tape WS-48A (3 kHz, 0 dB) Tape Speed Adjustment Procedure : 1.Mode: FWD playback Adjustment Limits : TAPE OUT level Level difference between channels 4 2 dB (0.39 to 0.62 V)within 2 dB Check that the TAPE OUT level does not change even if Playback and Stop operation is repeated several times. Adjustment Location : MAIN board (See page 15.) TAPE OUT level meter 47 k set test tape P-4-L300 (315 Hz, 0 dB) 2.Mode: Playback 3.Confirm playback the signal recorded in step 1 become adjustment level as follows. 4.If these levels do not adjustment level, adjust SFR01 (L-CH) and SFR02 (R-CH) on REC board to repeat step 1 and 2. Adjustment Level :Difference of playback output of 10 kHz to playback output of 315 Hz : 0 0.5 dB Adjustment Location : REC board (See page 15.) Record Level Adjustment Setting : Set to the TEST mode. (See page 4.) Procedure : 1.Mode: Record 2.Mode: Playback 3.Confirm playback the signal recorded in step 1 become adjustment level as follows. 4.If these levels do not adjustment level, adjust SFR11 (L-CH) and SFR12 (R-CH) on REC board to repeat step 1 and 2. Adjustment Level :Playback output level of 315 Hz : 4 2 dB (0.39 to 0.62 V) Adjustment Location : REC board (See page 15.) TAPE OUT TAPE OUT level meter 47 k set recorded portion AF OSC attenuator 10 k set 600 blank tape CS-123 AF OSC attenuator 10 k set 600 blank tape CS-123 level meter 47 k set recorded portion 15 IC02 CN03 CN11_ CN03_ CN10 CN05 SFR04 PLAYBACK LEVEL ADJ (R-CH) SFR03 PLAYBACK LEVEL ADJ (L-CH) SFR11 RECORD LEVEL ADJ (L-CH) SFR12 RECORD LEVEL ADJ (R-CH) M1 CAPSTAN /REEL MOTOR CN09 TEST MODE TAPE SPEED ADJ M2 LOADING MOTOR MECHANISM DECK SFR02 RECORD BIAS ADJ (R-CH) SFR01 RECORD BIAS ADJ (L-CH) Adjustment Location : MAIN board (component side) LOW-VOLTAGE board (component side) REC board (component side) 16 SECTION 6 DIAGRAMS 6-1. CIRCUIT BOARDS LOCATION TRANSFORMER board SLIDE SW board (Singapore, Malaysia, Hong Kong model) LOW-VOLTAGE board AMS board REC board MAIN board MOTOR board FRONT board DECK board POWER board 30 6-8. IC PIN DESCRIPTION IC04 PD75108GF-N14-3BE (SYSTEM CONTROL) Pin No.Pin NameI/OPin Description 1RVS REC RELAYORVS REC relay control output (Not used in this set.) 2FWD REC RELAYOFWD REC relay control output (Not used in this set.) 3RVS PLAY RELAYORVS PLAY relay control output (Not used in this set.) 4FWD PLAY RELAYOFWD PLAY relay control output (Not used in this set.) 5POWER OUTOPower output (Not used in this set.) 6AMS OUTOAMS gain control output (Not used in this set.) 7RESETIReset input (L : Reset) 8XTALOscillator circuit (4.19 MHz) 9XTALOscillator circuit (4.19 MHz) 10NR OUTONoise reduction signal output (Not used in this set.) 11REC/PBOREC/PB select output (H : REC, L : PB) 12F/RORVS/FWD select output (H : RVS, L : FWD) (Not used in this set.) 13BIASOBias oscillation control output (H : ON, L : OFF) 14LINE MUTEOLine mute control output (H : OFF, L : ON) 15PB.MUTEOPB mute control output (H : OFF, L : ON) 16REC.MUTEOREC mute control output (H : OFF, L : ON) 17TAPE 4OREC equalizer select output (H : METAL) (Not used in this set.) 18TAPE 2OREC equalizer select output (H : CrO2) 19TAPE 1OREC equalizer select output (H : NORMAL) 20M.FWDOReel motor forward direction rotation output 21M.REVOReel motor reverse direction rotation output 22H.SPEEDOTape speed control output 23L+OLoading motor forward direction rotation output 24L-OLoading motor reverse direction rotation output 25AU BUS OUTOAU BUS signal output 26VSSGround 27F.RECIMechanism deck FWD REC PROOF claw detection signal input (H : REC inhibit) 28R.RECIMechanism deck RVS REC PROOF claw detection signal input (H : REC inhibit) 29PACK INILoading detection signal input 30AU BUS INIAU BUS signal input 31AMS INIAMS signal input 32KEY 1IKey switch input 1 33KEY 0IKey switch input 0 34S.PLAY MODEIMechanism deck tape position detection signal input 35F.REELIMechanism deck FWD reel sensor detection signal input 36R.REELIMechanism deck RVS reel sensor detection signal input 37MODE SELIConnect to Ground in this set. 38CrO2IMechanism deck CrO2 switch input 39TAPE INIMechanism deck HALF switch input 40TEST PINIInput for test mode. (L : Test mode) 41NCIConnect to Ground in this set. 42, 43NCONot used in this set. 44POWER DOWN INIPower dete