Sony-TC-EX66-Service-Manual电路原理图.pdf

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1、MICROFILM TC-EX66 STEREO CASSETTE DECK SERVICE MANUAL This set is the cassette deck section in MHC-EX66. Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. SPECI

2、FICATIONS Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeTCM-ACLM578 AEP Model UK Model E Model RadioFans.CN 收音机爱 好者资料库 2 TABLE OF CONTENTS Servicing Notes . 2 1.GENERAL Playing a Tape .3 Recording on a Tape Manually.4 Recording the favorite CD Tracks on a Tape.5 2.DISASSEMBLY.6

3、3.MECHANICAL ADJUSTMENTS. 10 4.ELECTRICAL ADJUSTMENTS. 10 5.DIAGRAMS 5-1.Printed Wiring Boards . 15 5-2.Schematic Diagram . 19 5-3.IC Pin Function . 25 6.EXPLODED VIEWS. 27 7.ELECTRICAL PARTS LIST. 32 SERVICING NOTES How to operate with a single unit. Normally, this set is not operated with its own.

4、 The exclusive jig (J-2501-078-A) and service box (PFJ-1) are nec- essary to operate the set with a single unit. Turn the power set of the service box ON. Then press the ENTER/NEXT button and SLEEP button at the same time to turn the power on. Connection: KEY/FL tube/LED check mode. To enter KEY/FL

5、tube/LED check mode, press the ENTER/NEXT and REC buttons at the same time. Under mode, every time when press any key or turn MULTI CONTROLLER knob, change to next situation. 1 All LED indicators light on 2 All FL tube indicators light on 3 A part of FL tube light on mode 1. (Indicated ST-SEG) 4 A p

6、art of FL tube light on mode 2. (Indicated RDS-SEG) 5 KEY check mode Note: 1) All LED light on mode is kept, when buttons which is pressed to enter all LED light on mode, release same time. When release them separate timing, it is moved to next All LED light on mode. 2) After all LED light on mode,

7、light on point remove one by one, when any button pressed or MULTI CONTROLLER knob turned. 3) Under KEY check mode, every time buttons pressed numeri- cal value of “KEY” in FL tube increase. And that time, numerical value of “ECDR” increase when MULTI CONTROLLER button turn to + direction, and it de

8、crease turn to direction. When you want to finish this mode, unplug the power of amplifier or turn off PFJ-1 of POWER switch. POWER SW FH-E939, 838,937 CDP/TCCN904 17P CN902 7P CN101 7P JIG (J-2501-078-A) SERVICE BOX (PFJ-1) SET SYSTEM CONTROL CORD WITH CONNECTOR 7P (attached to set) CORD WITH CONNE

9、CTOR 17P (attached to PFJ-1) RadioFans.CN 收音机爱 好者资料库 3 This section is extracted from instruction manual. SECTION 1 GENERAL 4 5 6 SECTION 2 DISASSEMBLY This set can be disassembled in the order shown below. Note: Follow the disassembly procedure in the numerical order given. CASE, FRONT PANEL CASE,

10、FRONT PANEL (Page 6) MECHANISM DECK (Page 7) MAIN BOARD (Page 7) MECHANISM CHASSIS SECTION (Page 8) TRY ASSY (Page 8) CAPSTAN MOTOR (Page 9) 1two screws (case TP2) 3flat cable (5 core) (CN301) 5two screws (BVTP 3 8) 5 screw (BVTP3 8) 6 three claws 7 front panel 4 flat cable (27 core) (CN802) 1 two s

11、crews (case 3 TP 2) 2case 8lid (R-TC) 7 MECHANISM DECK 2four screws (BVTP3 8) 3mechanism deck 1two connectors (CN803, 804) 1connector (CN351) MAIN BOARD 2three connectors (CN351, 803, 804) 3two screws (BVTP3 8) 1Slide the tray to deviation of the arrow A. A 5two PCB holders 4two screws (BVTP3 10) 6m

12、ain board 8 TRAY ASSY 1screw (M1.7 8.2) 4arm 576 5tray assy 3boss 2tension spring MECHANISM CHASSIS SECTION 3mechanism chassis section 2screw (P3 8) 1four screws (BK3 6) 9 CAPSTAN MOTOTR 7capstan motor 5Hang the belt. 6three motor screws. 4Remove the solder of motor lead wire. 1step screw 3control b

13、oard 2two claws 2two claws 10 SECTION 4 ELECTRICAL 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 DIRECT

14、ION switch: A Standard record position Deliver the standard input signal level to input jack and set the REC LEVEL (RV301) control to obtain the standard output signal level as follows. Record Mode set AF OSC attenuator 600 10 k LINE IN + LINE OUT 47 k level meter ModeTorque MeterMeter Reading CQ-10

15、2C 30-65 gcm FWD (0.42-0.90 ozinch) FWD1.5-6 gcm Back tension(0.021-0.083 ozinch) CQ-102RC 30-65 gcm REV (0.42-0.90 ozinch) REV1.5-6 gcm Back tension(0.021-0.083 ozinch) 70-130 gcm FF, REWCQ-201B (0.98-1.80 ozinch) SECTION 3 MECHANICAL ADJUSTMENTS PRECAUTION 1.Clean the following parts with a denatu

16、red-alcohol-moistened swab: record/playback/earth headpinch roller rubber beltscapstan idlers 2.Demagnetize the record/playback head with a head demagne- tizer. (Do not bring the head demagnetizer close to the erase head.) 3.Do not use a magnetized screwdriver for the adjustments. 4.After the adjust

17、ments, apply suitable locking compound to the parts adjusted. 5.The adjustments should be performed with the rated power sup- ply voltage unless otherwise noted. Torque Measurement Standard Input Level Input terminalLINE IN source impedance10 k input signal level0.5 V ( 3.8 dB) Standard Output Level

18、 Output terminalLINE OUT (L-CH) load impedance47 k output signal level0.5 V ( 3.8 dB) Test Tape TypeSignalUsed for P-4-A10010 kHz, 10 dBAzimuth Adjustment P-4-L300315 Hz,0 dBPB Level Adjustment WS-48B3 kHz,0 dBTape Speed Adjustment 0 dB = 0.775 V Test Mode With the POWER turned OFF, short the test p

19、oint CN801 (2P) on the MAIN board (making IC801 pin & “L”) and turn the POWER ON. Thus, the TEST mode will be activated. If a recording is done in the TEST mode, the REC MEMORY mode becomes active where the tape is rewound by the amount of recording when a rewinding is executed after recording. Afte

20、r adjustment, make the CN801 (2P) open to release the TEST mode. 11 Record/Playback Head Azimuth Adjustment Procedure: 1.Mode: REV playback 2.Turn the adjustment screw for the maximum output levels. If these levels do not match, turn the adjustment screw until both of output levels match together wi

21、thin 1 dB. + set LINE OUT frequency counter test tape WS-48B (3 kHz, 0 dB) 47 k 1. Set to FWD playback mode. 2. Adjust Variable resistor on the motor (M902) so that the fre- quency counter reading becomes 3,000 90 Hz. 3. Confirm that the deviation between tape top and tape end is within 3%. Adjustme

22、nt Location: CAPSTAN/REEL motor (M902) Screw position L-CH peak within 1dB output level L-CH peakR-CH peak within 1dB angle R-CH peak 3.Phase Check Mode: REV playback + VH + Screen pattern GoodWrong in phase 4590135180 LINE OUT set R-CH L-CH47 k 47 k oscilloscope test tape P-4-A100 (10 kHz, 10 dB) 4

23、.Set in the FWD mode and repeat the step 1 to 3. 5.After the adjustment, lock the screw with locking compound. Adjustment Location: Record/Playback head FWD sideREV side Adjustment screw + set 47 k LINE OUT level meter test tape P-4-A100 (10 kHz, 10 dB) Tape Speed Adjustment Procedure: Mode: FWD pla

24、yback M902 adjustable resistor Sample Value of Wow and flutter: 0.3% or less W. RMS (WS-48B) 12 Record Level Adjustment Setting: REC LEVEL control: Standard record position (See page 10) set to the TEST mode (REC MEMRY mode) (See page 10) Procedure: 1.Mode :Record + set LINE OUT 47 k test tape P-4-L

25、300 (315 Hz, 0 dB) level meter Adjust RV151 (L-CH) and RV251 (R-CH) so that the reading on level meter meets the adjustment limits below. Adjustment Limits: LINE OUT level: 7.7 0.5 dB (0.301 to 0.338 V) Level difference between channels: within 2 dB Check that the LINE OUT level does not change even

26、 if Playback and Stop operation is repeated several times. Adjustment Location: MAIN board (See page 13) Playback Level Adjustment Procedure: Mode: FWD playback Record BIAS Adjustment Setting: REC LEVEL control: Standard record position (See page 10) Set to the TEST mode (REC MEMRY mode) (See page 1

27、0) Procedure: 1.Mode: Record set AF OSC attenuator 600 10 k blank tape CS-123 LINE IN 1) 315 Hz 2) 10 kHz 50 mV ( 23.8 dB) 2.Mode: Playback + set LINE OUT 47 k recorded portion level meter 3.Confirm playback the signal recorded in step 1 become ad- justment level as follows. 4.If these levels do not

28、 adjustment level, adjust the RV152 (L- CH) and RV252 (R-CH) to repeat step 1 and 2. Adjustment Level:Playback output of 10 kHz to playback output of 315 Hz: 0.5 dB. Adjustment Location: MAIN board (See page 13) set AF OSC attenuator 600 10 k blank tape CS-123 LINE IN 315 Hz, 50 mV ( 23.8 dB) 2.Mode

29、: Playback + set LINE OUT 47 k recorded portion level meter 3.Confirm playback the signal recorded in step 1 become ad- justment level as follows. 4.If these levels do not adjustment level, adjust RV153 (L-CH) and RV253 (R-CH) to repeat step 1 and 2. Adjustment Level: 23.8 0.5 dB (47 to 53 mV) Adjus

30、tment Location: MAIN board (See page 13) 13 Adjustment Parts Location CN801 TEST Mode RV152 Record BIAS (L-CH) RV252 Record BIAS (R-CH) RV253 Record Level (R-CH) RV153 Record Level (L-CH) RV151 Playback Level (L-CH) RV251 Playback Level (R-CH) J301CN11 MAIN BOARD (Component Side) 14 IC Block Diagram

31、s 12345678 910161514131211 GPGLGH I REFVCC IN (R) GND (R) OUT (R) IN (L) GND (L) OUT (L) f/QfQfMREF GND VEE CONTROL EQ EQ 12345678910 GND MOTOR DRIVE NOISE FILTER CLAMP FWD.IN REV.IN VCC 1 VCC 2 NOISE FILTER MOTOR DRIVE MOTOR DRIVE MOTOR DRIVE T.S.DO.C.P FWD/REV/STOP CONTROL LOGIC IC304CXA1198AP IC8

32、04LB1641 ON/OFF CURRENT LIMITER START CIRCUIT VREF OVER HEAT PROTECT ON/OFF CURRENT LIMITER 12345678910 VCC VMUTEVCC VREF ERROR AMP VREF ERROR AMP VO1 VCC CN1 EN EN DISPLAY GND NC CN2 VEE VO2 _1.8V _140uA COMPARATER IC805LA5617 SECTION 5 DIAGRAMS 25 1PULSEIPulse signal input 2NO-USENot used (Fixed a

33、t “L”) 3METER-LIDigital peak level meter signal input (L-ch) 4METER-RIDigital peak level meter signal input (R-ch) 5AD-GNDGround for A/D converter 6TESTINot used (Fixed at “L”) 7NO-USENot-used (Open) 8NO-USENot-used (Fixed at “L”) 9SYS-GNDGround for system 10OSC-OUTOSystem clock output (4 MHz) 11OSC

34、-INISystem clock input (4 MHz) 12RESETIReset signal input 13AUB-INIAudio bus input 14AUB-OUTOAudio bus output 15NO-USENot used (Fixed at “L”) 16NO-USENot used (Fixed at “L”) 17NO-USENot used (Fixed at “L”) 18NO-USENot used (Fixed at “L”) 19NO-USENot used (Fixed at “L”) 20DOLBY C/BODOLBY B/C select s

35、ignal output “L”: DOLBY B, “H”: DOLBY C 21DOLBY ON/OFFODOLBY on/off select signal output “L”: DOLBY off, “H”: DOLBY on 22CDSYNC-LEDOControl output to CD SYNC LED (D851) 23SEG17OSegment signal output to fluorescent indicator tube (FLT851) 24SEG16OSegment signal output to fluorescent indicator tube (F

36、LT851) 25SEG15OSegment signal output to fluorescent indicator tube (FLT851) 26SEG14OSegment signal output to fluorescent indicator tube (FLT851) 27SEG13OSegment signal output to fluorescent indicator tube (FLT851) 28SEG12OSegment signal output to fluorescent indicator tube (FLT851) 29SEG11OSegment s

37、ignal output to fluorescent indicator tube (FLT851) 30SEG10OSegment signal output to fluorescent indicator tube (FLT851) 31SEG9OSegment signal output to fluorescent indicator tube (FLT851) 32SEG8OSegment signal output to fluorescent indicator tube (FLT851) 33SEG7OSegment signal output to fluorescent

38、 indicator tube (FLT851) 34SEG6OSegment signal output to fluorescent indicator tube (FLT851) 35SEG5OSegment signal output to fluorescent indicator tube (FLT851) 36SEG4OSegment signal output to fluorescent indicator tube (FLT851) 37SEG3OSegment signal output to fluorescent indicator tube (FLT851) 38S

39、EG2OSegment signal output to fluorescent indicator tube (FLT851) 39SEG1OSegment signal output to fluorescent indicator tube (FLT851) 40FL-GNDIGround for fluorescent indicator tube (Fixed at “L” (20 V) 41GRID 1OGrid signal output to fluorescent indicator tube (FLT851) 42GRID 2OGrid signal output to f

40、luorescent indicator tube (FLT851) 43GRID 3OGrid signal output to fluorescent indicator tube (FLT851) 44GRID 4OGrid signal output to fluorescent indicator tube (FLT851) 45GRID 5OGrid signal output to fluorescent indicator tube (FLT851) 5-3.IC PIN FUNCTION DESCRIPTION MAIN BOARD IC801HD6433724E66F (S

41、YSTEM CONTROL) Pin No.Pin NameI/OFunction 26 46NO-USENot used (Open) 47NO-USENot used (Open) 48NO-USENot used (Open) 49TYPE IVOTape type output “H”: Metal Position 50TYPE IIOTape type output “H”: High position 51TYPE IOTape type output “H”: Normal position 52REC MUTEORecording mute on/off control ou

42、tput “H”: Mute on 53RELAYORelay drive output “H”: On 54NCNot used (Open) 55REC/PBOMode control output to DOLBY NR amplifier (IC301) “L”: Record 56PB MUTEOPlayback mute on/off control output “H”: Mute on 57SYS-VCCIPower supply for system 58OPTIONONot used (Fixed at “L”) 59NO-USENot used (Fixed at “L”

43、) 60POWER-OUTOAudio and mechanism power on/off output “H”: On 61BIASOControl output to recording bias switch (Q352) “L”: On 62POW-INIPrimary power on/off input “H”: On 63CLOSE SWIClose detection input from S901 “L”: Close 64OPEN-SWIOpen detection input from S902 “L”: Open 65SOLENOIDEOPlunger (PMxxx)

44、 drive output “H”: On 66LINE-MUTEOLine mute on/off control output “L”: Mute on 67CHORM-SWITape type detection input from Sxxx “L”: Type I 68METAL-SWITape type detection input from Sxxx “L”: Type IV 69REC-REV-SWIRecord proof detection input from Sxxx (REV side) “H”: Not nail 70REC-FW-SWIRecord proof

45、detection input from Sxxx (FWD side) “H”: Not nail 71CAPSTANOCapstan/reel motor (M902) drive output “H”: On 72CLOSEOLoading motor (M901) drive output *1 73OPENOLoading motor (M901) drive output *1 74TESTITest mode terminal 75MODE-SWIHead sensor input from Sxxx 76AD-VCCIPower supply for A/D converter

46、 77KEY 1IKey input (A/D convert input)*2 78KEY 2IKey input (A/D convert input)*2 79HALF-SWICassette half detection input from Sxxx 80AMS-INIAMS input Pin No.Pin NameI/OFunction *1 Loading Motor (M901) INOUTBRAKE CLOSE &HLH OPEN &LHH Voltage Input port 0 V0.45 V1.19 V2.19 V3.2 V3.98 V4.48 V5.0 V Pin

47、&, KEY 2 Open/CloseSTOPPAUSEFWDREVCD Not key input pPSYNC Pin &, KEY 1 POWERREWFFREC RESETDIRECTION DOLBY NRNot key input ON/OFF0)r *2 Key Input 27 NOTE: -XX and -X mean standardized parts, so they may have some difference from the original one. Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE) . . . (RED) Parts ColorCabinets Color Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. The mechanical parts with no reference num- ber in the