Denon-DP11F-tt-sm维修电路原理图.pdf

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1、DENONSERVICE MANUALFULLY AUTOMATICDIRECT DRIVE TURNTABLE SYSTEMMODEL DP-l IF SERIESHr Fr ComponentU.S. and Canadian models do not include cartridge.NIPPON COLUMBIA CO., LTD.RadioFans.CN 收音机爱 好者资料库TABLE OF CONTENTSFEATURESSPECIFICATIONS. .BLOCK DIAGRAMPART NAMES AND FUNCTIONEXPLANATION OF THE MICROPR

2、OCESSORADJUSTMENT METHOD .PARTS LIST OF EXPLODED VIEWEXPLODED VIEW OF MAIN PARTSSCHEMATIC DIAGRAMPRINTED CIRCUIT BOARDCONNECTIONS OF P.C. BOARDPARTS LIST OF P.C. BOARD. .123458I -10111213141516WARNING:1. Component partsParts marked with A and/or shading in this service manual have special characteri

3、stics important tosafety. Be sure to use the specified parts for replacement.2. Leakage currentBefore returning the appliance to customer, test the leakage current when the power plug is connected.Use a calibrated (with an error of not more than 5%) leakage current tester and measure the leakagecurr

4、ent from any exposed metal to the earth ground. Reverse the power plug polarity and test the aboveagain.Any current measured MUST NOT EXCEED 0.5 miliamps. Corrective measure must be taken if itexceeds the limit.Silent, fully automatic operations with the useof a microprocessor controlled contactless

5、 servotonearm.An innovative microprocessor controlled, contactless servotonearm ensures safe, easy to use automatic operations withlittle loss in sound quality.Low mass straight armThis arm is fully capable of maximizing the performance ofhigh compliance cartridges with outstanding tracing ability.E

6、ven with the newest, high grade records, its tracing abilityis outstanding.DENON QuartzThe turntable speed is controlled by the DENON Ouartzwhich is the combination of the High Precision MagneticPulse Detection Method. the most sophisticated methodof FG detection, and the Ouartz Lock.-1-RadioFans.CN

7、 收音机爱 好者资料库SPECIFICATIONSPhonomotor sectionDrive system: Servo controlled direct driveTurntable speeds: 33-1/3,45 rpmWow & flutter: Below 0.02% wrms (servo system)Below 0.037o wrms (JlS)S/N ratio: Over 75 dB (D|N-B)Rise time: Normal speed within 2 seconds (at 33-1 /3 rpm)Platter: Aluminum die-cast;3

8、00 mm diameterMotor: Linear drive motorSpeed control system: Speed servo by frequency detection, phase servo controlSpeed deviation: Below 0.002%Load characteristics: 0% (gO g stylus force; outermost groove)GeneralPower supply: 50-60 Hz, Voltage is shown on rating labelPower consumption: 7 WDimensio

9、ns: 100 x 365 x 335 mm (H x W x D)Weight: Approximately 5 kgTonearm sectionArm type: Dynamically balance, semi-integrated straight armEffegtive length: 22O mmOverhang: 16 mmTracking error: Within 3oAutomatic mechanism: Electronically controlled, fully automaticAdjustable stylus force range: 0-3.0 g

10、(1 scale=0.1 g)Suitable cartridge weight range: Approximately 4.0-6.0 g (including screws, nuts)Cartridge section (Only for those models with attached cartridge)DL-60Type: Moving magnet (MM)Output voltage: 2.5 mVFrequency response: 20-30 kHzStylus force: 1.810.3 gAbove specifications and outward app

11、earance may be altered in future for improvement.U.S. and Canadian models do not include cartridge.-2-Lock iBLOCK DIAGRAMMemorizeReference voltageF/V outputStart/stop commandndication/+*RotationcontrolPoweramplifierSpeed selector(33/451 oSize sel ector(30/1 7) oReference voltageMemorizeMemorizeMemor

12、ize Compare/amplifyStop. cbntrolSpeed detectionAnti skate commandAnti skate.voltageRotation Powercontrol amPlifierPoweramplif ierMid-point detectionPhonomotorVertical mot(Lifter motor!coEEooc3oElEil;lCompare/amplifyHorizontal molRotational speed detectionMagnetic polaritydq!q9!,on _ _?,Magnetic pola

13、ritydetectionMotor-controlm icroprocessortR3T0217130 PositiondetebtionReference voltageArm controlmicroprocessortR3TO3Accela ration outputI!oooEcoNorRest/end detectionSpeed detection-3-Note: -Ep inairts an analog PART NAMES AND FUNCTIONDust coverBalance weightTonearmREPEAT (Repeat switch)When playin

14、g the records repeatedly, switch it on(lamp lit). eowen (Power switch)This switch turns the power supply on (l and off(f ). When turning the power off, always return thetonearm to the arm rest and hold it in place with theclamp. SlZe (Record size selector switchlSet to the size of record to be playe

15、d.30 cm records17 cm records SfeeO (Speed selector switch)Set to the desired record speed.33-1/3 rpm records . . 33 (lamp lit)4S rpm records . . . . 45 (lamp lit) LOCK (Lock indicator)When the power is turned on, the lamp will light up.During play. the lamp will flicker until the properturntable spe

16、ed is reached. Once the proper speedis obtained, the lamp will, again. stay lit.30 (lamp lit)17 (lamp lit) ARM LTFTER (Arm tifterswitch)This switch is used to raise and lower the arm duringplay or when playing the records manually. The lampis lit when arm is up.START (Start switchlPress this switch

17、when starting the records auto-matically. STOP (Stop switch)Press this switch when stopping the record duringplay. STYLUS FORCE (stytus force adjustment knob)-4-This knob is used to adjust the stylus EXPLANATION OF THE MICROPROCESSOR. Motor Control lC . . . lR3T02 (at standardrevolution of 33 rpm)Th

18、e numbers on the left hand side indicates the terminalnumber.2. 4.5MHz OSC3. 4.5MHz OSCrpm selectorH: 45 rpmL: 33 rpmpower source inputVcc: 5V +0.5VFG I bypass terminalEG =%YccFG I lowPass terminiFG I inverse inputThe gain set element is connected.E9l%YccFG I non-inverse input10mVpp - 1OOmVPPE10 = %

19、Yccground terminalF/V outputslower than normal revolution: 2 - 4.5Vnormal revolution: i 2Vfaster than normal revolution: O - 2V9.10.14.15.4.5.6.7.16. r/v hold terminalsJnre as terminal 1517. F/V triangular waveslorvtr than rtornral revolutionl_i7. .1.tj/nLs-lta1/1-I,_I-2vnormal revolutionfaster than

20、 normal revolutiont I ; l.ttrnSl*.1t/v/1AItllT-:Iv8. FG I outPutt l 7 l.8tt? Sr1- -r-i t: r z,tlowpass terminalt,/2yct,2-1.5v-5-?/18. timing pulse width-set terminalE18 = 0.6V19. PD triangular wave26. START/STOP terminatH + STARTL -+ STOP28. Lock indicatorduring lock (LED tit dimty)69HZ+4Vstop. . (L

21、EDtit)during transition . . (LED flashes)+4v.r 4.5rn s.JLTL20. sample pulse monitor.terminal-:J! _s*lF ;:0.6 vadvance 021 PD hold terminalslowphase:2-4Vnormal phase: = 2Vadvancedphase:1 -3V22. PD outputsame as terminal 21Lock detector time set terminalduring lock: 0.6Vlock disengaged:0VRevolution de

22、tectorduring revolution: :-.-,.-I + 4Vstop: 0VFou. o.4ss , 2.2H2m23.el*:25.- 6,-o Arm Control lC lR3T03The numbers on the left side indicates the terminal numberof the lR3T03.1. Accelaration inPutExcept for the matching range of the lead-in detector(E7 I t0.6V | ), it will recognize the situation an

23、d controlthe accelaration during automatic tonearm operation.2. Accelaration outputrt 5l tz.szv t0.1v I . . . open (will not control the ac-celaration within the match-ing range)er 2lrz.sv10.1v | . . . . E2=t3.95V-3.95V: will accelarate toward the inside from rest+3.95V: will accelarate toward rest

24、from the inside3. UP/DOWN selection of the arm lifterWhen E9 is H, the control output for lifting the arm will bemade at E3 = -Vcc.When E9 is L, the control output for lowering the arm willbe made at E3 = +Vcc.4. Detection of the rest PositionE4 2.64V when the stylus tip nears the last sections ofth

25、e sound groove.6. End controlWhithin the END detection range of 5 (above), (E5 2.64V, the arm will be returned by the END control whenE6 0.23V.E5 0.23V when the stylus tip moves into the lead-outgroove and the arm moves fast.7. Matching inputE7 | 10.6V lwill be recognized as the match range forI ead

26、-i n .8. Drive outputConnect to GND.9. UP control outputWhen the lifter is in the UP position during automatic armoperations or when the UP signal is sent by pressing the armlifter button, pin 9 will be at H level.EgH + 4VE9L: OV10. DOWN time constantTo ensure that the arm is lowered completely befo

27、re pro-ceeding to the next movement, a resistor between pins 9and 10 and a capacitor on pin 10 has a preset dischargetime constant which is somewhat longer than the timerequired for the arm to be lowered. Thus, when pin 9becomes L (EgL : 0V), and the fixed amount of timeelapses. the arm will be reco

28、gnized to be DOWN as soon asE10 2V.11. ANT (Anti-skating) controlWhen E10 0.23V), a con-trol signal output (E17H 4V) is mqde to return the armto rest.E17H 4VE17L: release18. Horizontal drive controlWhen the arm is in resting position, or when the armreaches the lead-in position during automatic play

29、, andcomes into the matching range (E7 ( 1 tO.Ov | ), a controlsignal output (E18H = 4V) is made to stop the horizontalmotion of the arm.19. InitialsetThis is the preparation time setting ierminal when thepower source is turned on. The resistor in the LSI and theouter capacitor will set the charge t

30、ime constant and carryout the initial set.-7 -20. LCTD (Located) time constantThe LSI and its outer circuits will set the LCTD timeconstant to improve the detection accuracy of the lead-inposition and the arm rest position.E20H = 1.2V. A few moments after the arm reachesthe range of detection, in ot

31、her words,after the set LCTD time constantelapses, it will become H level, whereit is memorized immediately and thenreset to the L level. Before and after detection, it willbecome L level.E20L = 0V21. Turntable (T/T) Drive ControlE21L=0V . . . . . theturntablestopsE21H release . . . . theturntable r

32、otates(refer to the operational explanations for pin 22)22. Turntable (T/T) Start PositionThis terminal establishes the turntable start position. Theturntable will start when the arm separates from the armrest and pin 22 is released, under manual and auto modes.23. StartWill start automatically at t

33、he GND level.24. Auto stopWill stop automatically at the GND level.25. LifterWill raise the lifter automatically at the GND level.26. RepeatWill engage the repeat automatically at the GND level.27. UP SWAn UP time constant circuit is used so that when the lifteris in the UP condition, this terminal

34、is released and becomesH level; and at other times, it becomes GND level.With this unit, the arm will start to move approximatelytwo seconds after the UP command.28. Positive power supplySupplies +5V.-8-ADJUSTMENT METHOD* Prepare a two-channel oscilloscope for the measuringinstrument.r Adjusting the

35、 Phonomotor Section* Measure, using the wrapping terminal number 8 of themotor drive circuit board as the ground referent point whenadjusting the motor OP amp. voltage offset and the motortorque.VR2O3 (Motor torque adiustment)VR2Ol (Motor offset adiustment)VR202 (Motor offset adiustment)VR204 (Motor

36、 torque adiustment)TP203TP2O4Motor drive circuit boardServo control circuit boardVR2 45rPm Lock adjustmentVR1 33rPm Lock adiustme1. Adjusting the motor amp. offset voltage1) Fix the tonearm to the arm rest and connect the oscil-loscope to TP 203 and 2Q4 .2l Rotating the turntable by hand, adjust the

37、 center ofamplitude at TP 203 1s Q 101V by turning VR 201 3) Following the preceding directions adiust to 0 t01VbyturningVR 2O2 forTP 2O42. Adjusting the motor torque1 ) Leave the oscilloscope connections as they were for themotor OP amp. voltage offset adjustments2l Take the turntable off the main

38、body; move the tone-arm close to the speed detection head and rotate thephonomotor at a fast sPeed.(Note) Be very cautious as not to damage the cartridgeduring this Procedure.3) For T.P. 2O3 , rotate VR 2O3 and adiust to15VP-PtO.5V.4l For T.P. 2O4, rotate VR 2O4 and adjust to15VP-Pt0.5V.3. Adjusting

39、 the head gapAdjust, so that the gap between the turntable magneticcoating surface and the detection head is 0.18 mm.4. Lock adjustments for 45 rpmFrom hereafter, the earth reference point of the measuringinstrument should be connected to T.P. 6 of the servocontrol circuit board.1) Connect the two-c

40、hannel oscilloscope to T.P. 1 andT.P. 2.2l Set the speed selector to 45 rpm,3) Take the arm off the arm rest and move it toward theturntable to rotate the phonomotor.4l Adjust VR2 so that the pulse from T.P. 1 is posi-tioned to % the triangular wave length from f .P. 2 .5.1)2lLock adjustments for 33

41、 rpmConnect the oscilloscope in the same manner as the45 rpm lock adjustments. Set the speed selector to33 rpm.Adjust VR1 in the same manner as the lock adjust-ments for 45 rpm.aflovFPro5r-9-o Adjusting the Arm Control SectionLead-in adiustment holeVR5 (Stylus force adiustment)VR3 (Horizontal offset

42、 adiustment)1. Adjusting the horizontal OP amp. offsetvoltage1) Fix the tonearm to the armrest and connect the oscil-loscope to T. P. 3 .2 Set the lifter switch to the UP condition.3) Turn VR3 and adjust to 0V10.01V.2. Adjusting the lifter OP amp. offset voltagp1) Fix the tonearm to the armrest and

43、connect the oscil-loscope to T. P. 4 .2l Set the lifter switch to the DOWN condition.3) Turn VR4 and adjust to -1V10.1V.3. Adjusting the stylus force1) Turn the power supply switch OFF.2l Take the arm off the armrest. Rotate the balanceweight so that the tonearm becomes parallel to theturntable surf

44、ace when let go.3) Return the arm to the armrest and turn the powersupply switch ON.4) Wait five seconds after the arm has lowered. Place thecartridge stylus tip onto a stylus force guage and setthe stylus force adjustment knob to 1.5 g.(Notel At this time, the stylus tip height should beadjusted so

45、 that it is about the same height as duringplay.5) Turn VR5 and adjust, so that the stylus force guagereads 1.5 g.4. Adjusting the 30 cm lead-in position1) Place a 30 cm record on the turntable and set therecord size selector switch to 30.(Note) Keep the bottom cover closed.Move the arm so that the

46、stylus tip is at approximatelythe 30 cm lead-in position. lnsert a small flat-headedscrewdriver into the lead-in adjustment hole; move thearm back and forth and fit the screw driver into thegroove of the cam inside gently.After turning the screwdriver, pull it out. Press thestart switch and adjust s

47、o that the stylus position stopsat the 30 cm lead-in position.(Note) The 30 cm lead-in adjustments cannot be per-formed unless the stylus tip position is approximatelyin the 30 cm lead-in position. ln addition, if the screw-driver is left inserted, the arm will not move.5. Adjusting the 17 cm lead-i

48、n positionAdjust as necessary, such as when parts of the sensor sec-tion have been replaced.However, the following procedures should only be usedwhen a discrepancy is found for the 17 cm lead-in position,after the 30 cm lead-in position has been adjusted.1) Set the record size selector to 17 cm.2l B

49、y continuously pressing the start switch, the arm willmove over and stop. At this time, check now manymillimeters, toward the inside or outside, the stylus tipdeviates from the required 17 cm lead-in position.3) Take off the bottom cover of the cabinet and check theadjustment scale position of the s

50、hutter. (One adjust-ment scale corresponds to a stylus tip movement of5 mm.)4l Untighten the screw holding the sub shutter and placea small screwdriver into the slot of the shutter. Whenthe stylus position is toward the inside, compared tothe required position, move the sub shutter toward theright o