Denon-DP11F-tt-sm 电路图 维修手册.pdf

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1、DENON SERVICE MANUAL FULLY AUTOMATIC DIRECT DRIVE TURNTABLE SYSTEM MODEL DP-l IF SERIES Hr Fr Component U.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 CONTENTS FEATURES SPECIFICATIONS. . BLOCK DIAGRAM PART NAMES AND FUNCTION EXPLANATION

2、OF THE MICROPROCESSOR ADJUSTMENT METHOD . PARTS LIST OF EXPLODED VIEW EXPLODED VIEW OF MAIN PARTS SCHEMATIC DIAGRAM PRINTED CIRCUIT BOARD CONNECTIONS OF P.C. BOARD PARTS LIST OF P.C. BOARD. . 1 2 3 4 58 I -10 11 12 13 14 15 16 WARNING: 1. Component parts Parts marked with A and/or shading in this se

3、rvice manual have special characteristics important to safety. Be sure to use the specified parts for replacement. 2. Leakage current Before 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 cu

4、rrent tester and measure the leakage current from any exposed metal to the earth ground. Reverse the power plug polarity and test the above again. Any current measured MUST NOT EXCEED 0.5 miliamps. Corrective measure must be taken if it exceeds the limit. Silent, fully automatic operations with the

5、use of a microprocessor controlled contactless servo tonearm. An innovative microprocessor controlled, contactless servo tonearm ensures safe, easy to use automatic operations with little loss in sound quality. Low mass straight arm This arm is fully capable of maximizing the performance of high com

6、pliance cartridges with outstanding tracing ability. Even with the newest, high grade records, its tracing ability is outstanding. DENON Quartz The turntable speed is controlled by the DENON Ouartz which is the combination of the High Precision Magnetic Pulse Detection Method. the most sophisticated

7、 method of FG detection, and the Ouartz Lock. -1- RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS Phonomotor section Drive system: Servo controlled direct drive Turntable speeds: 33-1/3,45 rpm Wow 300 mm diameter Motor: Linear drive motor Speed control system: Speed servo by frequency detection, phase servo

8、control Speed deviation: Below 0.002% Load characteristics: 0% (gO g stylus force; outermost groove) General Power supply: 50-60 Hz, Voltage is shown on rating label Power consumption: 7 W Dimensions: 100 x 365 x 335 mm (H x W x D) Weight: Approximately 5 kg Tonearm section Arm type: Dynamically bal

9、ance, semi-integrated straight arm Effegtive length: 22O mm Overhang: 16 mm Tracking error: Within 3o Automatic mechanism: Electronically controlled, fully automatic Adjustable stylus force range: 0-3.0 g (1 scale=0.1 g) Suitable cartridge weight range: Approximately 4.0-6.0 g (including screws, nut

10、s) Cartridge section (Only for those models with attached cartridge) DL-60 Type: Moving magnet (MM) Output voltage: 2.5 mV Frequency response: 20-30 kHz Stylus force: 1.810.3 g Above specifications and outward appearance may be altered in future for improvement. U.S. and Canadian models do not inclu

11、de cartridge. -2- RadioFans.CN 收音机爱 好者资料库 Lock i BLOCK DIAGRAM Memorize Reference voltage F/V output Start/stop command ndication /+* Rotation control Power amplifier Speed selector (33/451 o Size sel ector (30/1 7) o Reference voltage Memorize Memorize Memorize Compare/ amplify Stop. cbntrol Speed

12、detection Anti skate command Anti skate.voltage Rotation Power control amPlifier Power amplif ier Mid-point detection Phonomotor Vertical mot( (Lifter motor !c o E E o o c 3 o E l E il;l Compare/ amplify Horizontal mol Rotational speed detection Magnetic polarity dq!q9!,on _ _?, Magnetic polarity de

13、tection Motor-control m icroprocessor tR3T02 17130 Position detebtion Reference voltage Arm control microprocessor tR3TO3 Accela ration output I ! o o o E c o N o r Rest/end detection Speed detection -3- Note: -Ep inairts an analog switch PART NAMES AND FUNCTION Dust cover Balance weight Tonearm REP

14、EAT (Repeat switch) When playing 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 the tonearm to the arm rest and hold it in place with the clamp. SlZe (Record size selector switchl

15、Set to the size of record to be played. 30 cm records 17 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 lam

16、p will flicker until the proper turntable speed is reached. Once the proper speed is 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 during play or when playing the records manually. The lamp is lit wh

17、en arm is up. START (Start switchl Press this switch when starting the records auto- matically. STOP (Stop switch) Press this switch when stopping the record during play. STYLUS FORCE (stytus force adjustment knob) -4- This knob is used to adjust the stylus force. EXPLANATION OF THE MICROPROCESSOR .

18、 Motor Control lC . . . lR3T02 (at standard revolution of 33 rpm) The numbers on the left hand side indicates the terminal number. 2. 4.5MHz OSC 3. 4.5MHz OSC rpm selector H: 45 rpm L: 33 rpm power source input Vcc: 5V +0.5V FG I bypass terminal EG =%Ycc FG I lowPass termini FG I inverse input The g

19、ain set element is connected. E9l%Ycc FG I non-inverse input 10mVpp - 1OOmVPP E10 = %Ycc ground terminal F/V output slower than normal revolution: 2 - 4.5V normal revolution: i 2V faster than normal revolution: O - 2V 9. 10. 14. 15. 4. 5. 6. 7. 16. r/v hold terminal sJnre as terminal 15 17. F/V tria

20、ngular wave slorvtr than rtornral revolution l_ i7. .1.tj/nLs -l ta1/1-I, _I- 2v normal revolution faster than normal revolution t I ; l.ttrnS l*.1 t/v/1 A ItllT-: I v 8. FG I outPut t l 7 l.8tt? S r1 - -r- i t: r z ,t lowpass terminal t,/2yct, 2-1.5v -5- ?/ 18. timing pulse width-set terminal E18 =

21、 0.6V 19. PD triangular wave 26. START/STOP terminat H + START L -+ STOP 28. Lock indicator during lock (LED tit dimty) 69HZ +4V stop. . (LEDtit) during transition . . (LED flashes) +4v .r 4.5rn s. JLTL 20. sample pulse monitor.terminal -:J! _s *lF ; :0.6 v advance 0 21 PD hold terminal slowphase:2-

22、4V normal phase: = 2V advancedphase:1 -3V 22. PD output same as terminal 21 Lock detector time set terminal during lock: 0.6V lock disengaged:0V Revolution detector during revolution: :-.-,.-I + 4V stop: 0V Fou . o.4ss , 2.2H2 m 23. el *: 25. - 6,- o Arm Control lC lR3T03 The numbers on the left sid

23、e indicates the terminal number of the lR3T03. 1. Accelaration inPut Except for the matching range of the lead-in detector (E7 I t0.6V | ), it will recognize the situation and control the accelaration during automatic tonearm operation. 2. Accelaration output rt 5l tz.szv t0.1v I . . . open (will no

24、t 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 from the inside 3. UP/DOWN selection of the arm lifter When E9 is H, the control output for lifting the arm will be ma

25、de at E3 = -Vcc. When E9 is L, the control output for lowering the arm will be made at E3 = +Vcc. 4. Detection of the rest Position E4 2.64V when the stylus tip nears the last sections of the sound groove. 6. End control Whithin the END detection range of 5 (above), (E5 2.64V, the arm will be return

26、ed by the END control when E6 0.23V. E5 0.23V when the stylus tip moves into the lead-out groove and the arm moves fast. 7. Matching input E7 | 10.6V lwill be recognized as the match range for I ead-i n . 8. Drive output Connect to GND. 9. UP control output When the lifter is in the UP position duri

27、ng automatic arm operations or when the UP signal is sent by pressing the arm lifter button, pin 9 will be at H level. EgH + 4V E9L: OV 10. DOWN time constant To ensure that the arm is lowered completely before pro- ceeding to the next movement, a resistor between pins 9 and 10 and a capacitor on pi

28、n 10 has a preset discharge time constant which is somewhat longer than the time required for the arm to be lowered. Thus, when pin 9 becomes L (EgL : 0V), and the fixed amount of time elapses. the arm will be recognized to be DOWN as soon as E10 2V. 11. ANT (Anti-skating) control When E10 0.23V), a

29、 con- trol signal output (E17H 4V) is mqde to return the arm to rest. E17H 4V E17L: release 18. Horizontal drive control When the arm is in resting position, or when the arm reaches the lead-in position during automatic play, and comes into the matching range (E7 ( 1 tO.Ov | ), a control signal outp

30、ut (E18H = 4V) is made to stop the horizontal motion of the arm. 19. Initialset This is the preparation time setting ierminal when the power source is turned on. The resistor in the LSI and the outer capacitor will set the charge time constant and carry out the initial set. -7 - 20. LCTD (Located) t

31、ime constant The LSI and its outer circuits will set the LCTD time constant to improve the detection accuracy of the lead-in position and the arm rest position. E20H = 1.2V. A few moments after the arm reaches the range of detection, in other words, after the set LCTD time constant elapses, it will

32、become H level, where it is memorized immediately and then reset to the L level. . Before and after detection, it will become L level. E20L = 0V 21. Turntable (T/T) Drive Control E21L=0V . . . . . theturntablestops E21H release . . . . theturntable rotates (refer to the operational explanations for

33、pin 22) 22. Turntable (T/T) Start Position This terminal establishes the turntable start position. The turntable will start when the arm separates from the arm rest and pin 22 is released, under manual and auto modes. 23. Start Will start automatically at the GND level. 24. Auto stop Will stop autom

34、atically at the GND level. 25. Lifter Will raise the lifter automatically at the GND level. 26. Repeat Will engage the repeat automatically at the GND level. 27. UP SW An UP time constant circuit is used so that when the lifter is in the UP condition, this terminal is released and becomes H level; a

35、nd at other times, it becomes GND level. With this unit, the arm will start to move approximately two seconds after the UP command. 28. Positive power supply Supplies +5V. -8- ADJUSTMENT METHOD * Prepare a two-channel oscilloscope for the measuring instrument. r Adjusting the Phonomotor Section * Me

36、asure, using the wrapping terminal number 8 of the motor drive circuit board as the ground referent point when adjusting the motor OP amp. voltage offset and the motor torque. VR2O3 (Motor torque adiustment) VR2Ol (Motor offset adiustment) VR202 (Motor offset adiustment) VR204 (Motor torque adiustme

37、nt) TP203 TP2O4 Motor drive circuit board Servo control circuit board VR2 45rPm Lock adjustment VR1 33rPm Lock adiustme 1. Adjusting the motor amp. offset voltage 1) 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 cente

38、r of amplitude at TP 203 1s Q 101V by turning VR 201 3) Following the preceding directions adiust to 0 t01V byturningVR 2O2 forTP 2O4 2. Adjusting the motor torque 1 ) Leave the oscilloscope connections as they were for the motor OP amp. voltage offset adjustments 2l Take the turntable off the main

39、body; move the tone- arm close to the speed detection head and rotate the phonomotor at a fast sPeed. (Note) Be very cautious as not to damage the cartridge during this Procedure. 3) For T.P. 2O3 , rotate VR 2O3 and adiust to 15VP-PtO.5V. 4l For T.P. 2O4, rotate VR 2O4 and adjust to 15VP-Pt0.5V. 3.

40、Adjusting the head gap Adjust, so that the gap between the turntable magnetic coating surface and the detection head is 0.18 mm. 4. Lock adjustments for 45 rpm From hereafter, the earth reference point of the measuring instrument should be connected to T.P. 6 of the servo control circuit board. 1) C

41、onnect the two-channel oscilloscope to T.P. 1 and T.P. 2. 2l Set the speed selector to 45 rpm, 3) Take the arm off the arm rest and move it toward the turntable 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)

42、2l Lock adjustments for 33 rpm Connect the oscilloscope in the same manner as the 45 rpm lock adjustments. Set the speed selector to 33 rpm. Adjust VR1 in the same manner as the lock adjust- ments for 45 rpm. aflovFPro5r -9- o Adjusting the Arm Control Section Lead-in adiustment hole VR5 (Stylus for

43、ce adiustment) VR3 (Horizontal offset adiustment) 1. Adjusting the horizontal OP amp. offsetvoltage 1) 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 vo

44、ltagp 1) Fix the tonearm to the armrest and 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 force 1) Turn the power supply switch OFF. 2l Take the arm off the armrest. Rotate the balance weight so tha

45、t the tonearm becomes parallel to the turntable surface when let go. 3) Return the arm to the armrest and turn the power supply switch ON. 4) Wait five seconds after the arm has lowered. Place the cartridge stylus tip onto a stylus force guage and set the stylus force adjustment knob to 1.5 g. (Note

46、l At this time, the stylus tip height should be adjusted so that it is about the same height as during play. 5) Turn VR5 and adjust, so that the stylus force guage reads 1.5 g. 4. Adjusting the 30 cm lead-in position 1) Place a 30 cm record on the turntable and set the record size selector switch to

47、 30. (Note) Keep the bottom cover closed. Move the arm so that the stylus tip is at approximately the 30 cm lead-in position. lnsert a small flat-headed screwdriver into the lead-in adjustment hole; move the arm back and forth and fit the screw driver into the groove of the cam inside gently. After

48、turning the screwdriver, pull it out. Press the start switch and adjust so that the stylus position stops at the 30 cm lead-in position. (Note) The 30 cm lead-in adjustments cannot be per- formed unless the stylus tip position is approximately in the 30 cm lead-in position. ln addition, if the screw

49、- driver is left inserted, the arm will not move. 5. Adjusting the 17 cm lead-in position Adjust as necessary, such as when parts of the sensor sec- tion have been replaced. However, the following procedures should only be used when 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 By continuously pressing the start switch, the arm will move over and stop. At this time, check now many millimeters, toward the inside