Kenwood-KACX-1-R-Service-Manual 电路图 维修手册.pdf

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1、 2007-1 PRINTED IN JAPAN B53-0490-00 (N) 820 POWER AMPLIFIER KAC-PS1D/X1R SERVICE MANUAL Dressing Panel (A21-6576-01) : KAC-X1R (A21-6577-01) : KAC-PS1D Screw set (N99-1795-05) Screw set (N99-1766-05) Modular cable (E30-6240-15) Mouting hardware (J22-0301-14) Remote control (X16-6000-10) KAC-PS1D on

2、ly 6m Fuse (25A) (F52-0014-05) KCA-WR10 KAC-PS1D KAC-X1R KAC-PS1D KAC-X1R This product uses Lead Free solder. RadioFans.CN 收音机爱 好者资料库 KAC-PS1D/X1R 2 BLOCK DIAGRAM (X08-431)(X09-856) IC10,11 ISO-AMPL RISO-AMP IC10,11 (0.2-5V) LINE IN L R LINE OUT SENS. VOL IC3 IC3 SEL. LINE OUT IC1 L/R MIX IC55-57 BO

3、OST BASS L.P.F IC2 IC4 L.P.F (400Hz) L.P.F SEL. S1 SEL. B.R.F B.R.F IC8 S2 SEL. S3 I.N.V IC6 I.N.VI.S.F SEL. I.S.F IC7 S4 1 LIMIT IC24 MUTE ATT Q101,102,131 SUMMING AMP IC13(2/2) COMP IC14 TIME IC15,16 DEAD WAVE IC20(1/2) TRIANGLE COMP IC15 TIME IC16,21 DEAD I.N.V (2/2) Q42,43,156,188 SHIFT Q44,45,1

4、57,189 LEVEL DRIVE 191,193 NF AMP IC13(1/2) 184,185 MOS-FET 186,187 FINAL LC FILTER SP-OUTPUT (BTL) DRIVE 190,192 D-AMP ON/OFF Q150,151 DET Q174-178 OVERLOADTHERMAL TH1,2 DET DC-OFFSET Q179,180 DET DRIVER IC11(X08- ) AVR 15V 28,32 +HB AVR Q31,33,34 Q50-53 FL AVR CURRENT BATT. IC3 DC/DC CON AVR +5V Q

5、3-5 Q1,2 POWER ON/OFF LC FILTER Q37,38,83 FAN FAN AVR FL u-COM IC1 REM PUSH SW ROTARY GND BATT. P-CON (to u-COM) BATT. VOLT INDI. POWER (40-200Hz) FREQ (40-200Hz) FREQ FREQ (15-60Hz) 40-100Hz FREQ 0-18dB LEVEL SHIFT LEVEL Q158,160-163, Q159,164-167, IC20 MOS-FET FINAL Q168,169, Q170,171, IC19(2/2,)I

6、C6,7, B Q25,26, 1200W/2 1200W OVER/1 600W/4 VR1 VR1 -6dB -12dB VR3VR4 RadioFans.CN 收音机爱 好者资料库 KAC-PS1D/X1R 3 COMPONENTS DESCRIPTION AUDIO UNIT (X09-8560-10) Ref. No.Application / FunctionOperation / Condition / Compatibility IC1-comOverall control. IC3DC/DC converter driverGenerates the gate wavefor

7、m for switching. IC5 (2/2)Comparator Compares the analog signal with the triangular wave and generates the PWM waveform for the minus output-side amplifier of the BTL. IC6 (1/2)ComparatorDetects ASO. Compares current with voltage to detect short in the output. IC6 (2/2)Comparator Detects the resonan

8、ce waveform that is caused when the plus and minus terminals are shorted in the vicinity of the SP terminals, and protects from the short. IC7 (1/2)Comparator Detects over current with the waveform shaped in IC17 and sends the result of the detection to the -com and the TR used to control the D-clas

9、s amplifier. When SP+ or SP- terminal output is shorted to the ground, the current in the + power supply IC7 (2/2)Comparator and that in the - power supply are unbalanced. The unbalance in the current is converted into DC voltage in Q176 and Q177, and when the voltage exceeds the preset value the ou

10、tput is reversed and the protection function is activated. IC10,11Isolation AMPRemoves the common mode noises in the input signal. IC12Buffer AMPBuffer AMP for RCA output. IC13 (1/2)Signal amplificationAmplifies the output voltage between the SP + and SP - terminals and generates the NF signal. IC13

11、 (2/2)Signal amplificationAmplifies differences between the input and feedback signals. Initial stage of the D-class amplifier. IC14 (1/2),Comparator, Triangular wave generation. IC20 (1/2)Signal amplification IC14 (2/2)Comparator Compares the analog signal with the triangular wave and generates the

12、 PWM waveform for the plus output + side amplifier of the BTL. IC15,16,21NAND gateTo gate pulse of the D-class amplifier. IC17NAND gate Retains the pulse width and keeps holds a certain width when IC6 and IC7 (2/2) detect its individual over current. IC18Signal amplification Amplifies and rectifies

13、the output voltage at the SP + terminal, and generates DC voltage that is proportional to the output. IC19 (1/2)Signal amplification Amplifies the potential differences caused by current running in the GND pattern, and sends it to the -com to obtain current. IC19 (2/2)Signal amplificationAmplifies t

14、he DC offset at the SP + terminal, and applies to the DC servo. IC20 (2/2)Signal amplificationGenerates the inverted waveform of the triangular wave that is generated in IC14 (1/2) and IC20 (1/2). IC22Filter Filters and rectifies the resonance waveform that is caused when the plus and minus terminal

15、s are shorted in the vicinity of the SP terminals, and sends the resultant DC voltage to IC6 (2/2). IC24Signal amplification When 1 load is detected, lowers the voltages at pins 1 and 7 and decreases the signal clipping level in order to limit the SP output. IC5557 BassBoost circuitBoosts the signal

16、 with the operations from the remote control. (Remote control operation)GAIN=0+18dB, fc=40100Hz Q1,2POWER ON SWITCHTurns ON/OFF DC/DC converter power supply in response to the output from pin 8 of the -com. Q35 5V constant voltage It is used as the constant voltage power supply of 5V for the -com an

17、d the SW5V. power supply Q6SW5V controlTurns ON/OFF 5V to the SW5V line in response to the output from pin 20 of the -com. Q7Pcon over voltage control Blocks the ON signal to the Pcon and places the Pcon in the OFF condition when the battery voltage is too high. RadioFans.CN 收音机爱 好者资料库 KAC-PS1D/X1R

18、4 Ref. No.Application / FunctionOperation / Condition / Compatibility Q8Pcon Switch Places the amplifier in the ON condition by sending “L” to pin 1 of the -com when the Pcon terminal becomes “H” while the battery voltage is in the normal range. Q10,11DD converter gate control Turns ON/OFF DD conver

19、ter gate drive pulse in response to the output from pin 8 (Power_On) of the -com. Q1316DD converter gate driverDrives the switching FET gate in the DD converter. Q1720, DD converter switching FET Repeats switching the transformers primary side to generate high voltage at the secondary Q2224,27side.

20、Q25,26 +15V constant voltageIn order to compensate HFE in Q26, both TRs in Q25 are connected with the Darlington power supplyconnection and the constant voltage of +15V is obtained. Q28,32 -15V constant voltageIn order to compensate HFE in Q28, both TRs in Q32 are connected with the Darlington power

21、 supplyconnection and the constant voltage of -15V is obtained. Tracking when -15V constant Adjusts the voltage drop in the -15V constant voltage power supply to the voltage in +15V Q29,30voltage power supply is side while the power OFF. turned OFF Q31,33,34 +15V constant voltage Power supply for th

22、e gate drive signal in the output FET high side. power supply for high voltage Q3638, Power supply for FAN In order to compensate HFE in Q38 and Q83, Q41 and Q36 are connected with the Q41,83Darlington connection in Q37 to turn ON/OFF by the -com. Q39Limiter level control When 1 load is detected, CE

23、s are ON and the voltages at pins 1 and 7 of IC24 are dropped in order to limit the signal amplitude. Q4245, Q156167,PWM shaping circuitGenerates the pulse signal for the gate drive of the high side and low side. Q188193 Q168171, FET for outputGenerates the PWM output waveform by the switching. Q184

24、187 Q47,48Power supply SW for FLTurns ON/OFF the FL power supply from pin 22 of the -com. Q5053 Constant voltage power Supplies the constant voltage of 2.3V to the FL filament. supply for FL filament Q54,55 Constant voltage power Turns ON/OFF the FL filament power supply from pin 22 of the -com. sup

25、ply SW for FL filament Q101,129MUTEMutes the audio signal from pin 56 of the -com to prevent applying the shock noise. Q102, ATT Lowers the volume when temperature at the output FET or in the vicinity of the transformer Q131133increases. For 1.5dB respectively. Q125,126ADV Reads the power supply vol

26、tage value to show it with the FL. Turns OFF when the power supply is OFF to save the backup current. Q150,151D-SWTurns ON/OFF the D-class amplifier stage from the -com or protection. Q179,180DC detectionTurns ON when DC is detected at the SP terminal and sends it to pin 64 of the -com. Q181,182ASO

27、detectionVoltage amplification circuit used when the ASO is detected Q174, Ground fault detection When SP+ or SP- output is shorted to the ground, sends the signal to pin 6 of the IC7 and Q176178protects against the ground fault. Q175ASO detectionCurrent amplification circuit used when the ASO is de

28、tected Q603LOGO-LEDTurns on the LOGO LED from pin 4 of the -com. COMPONENTS DESCRIPTION KAC-PS1D/X1R 5 PREAMPLIFIER UNIT (X08-4310-10) Ref. No.Application / FunctionOperation / Condition / Compatibility IC1 (1/2)Signal amplificationMixes Lch and Rch to make Mono signal. IC1 (2/2)Signal amplification

29、Buffer to send the signal that comes through LPF and Bass Boost to the Line Out. IC2Frequency fixed LPFLPF fixed at 400Hz. IC3Signal amplificationAmplifies the signal that comes through SensVol and outputs it with low impedance. IC4Frequency variable LPFLPF with variable frequency between 40200Hz. I

30、C5,6 (1/2)Band-cut filterAttenuates the frequency in the specific range between 40100Hz. IC6 (2/2)Reverse circuitChanges the phase by 180 degrees. IC7Frequency variable HPFAttenuates the frequency in the range of 1560Hz that is lower than the specific frequency. IC8 (1/2)Signal amplificationAmplifie

31、s the signal component to reduce noises in the subsequent BRF stages. IC11FL driverCommunicate with the -com, generates the data for FL display and reads in KEY. MICROCOMPUTER: 78F0533GK011A (X09-856: IC1) Pin No.Pin NameI/OApplication Truth Value Processing Operation Description Table 1P_CONIClears

32、 the stop mode by turning the P-CON ONL: Clear the stop mode 2D_CURENTIDetects the D-class over currentEnters into the protection operations. 3NCONot usedOutput L fixed 4PON_ILLUMOLOGO LED+B SWH: ON, L: OFF, Initial condition “L” 5FAN1OFAN rotation controlqH: Rotation, L: Stop, Initial condition L 6

33、RESETIReset 7D_POWEROD-class amplifier power supply controlH: D-class ON, L: D-class OFF 8POWER_ON_1OAmplifier power supply controlH: Amplifier power supply ON, Initial condition “L” 9FLASH_WIUsed when writing in the flash 10,11NCONot usedOutput L fixed 12REGC- 13VSS- 14EVSS- 15VDD- 16EVDD- 17,18NCO

34、Not usedOutput L fixed 19NCO 205V_SWOSW5V ON: LL: SW5V ON, Initial condition “L” 21NCONot usedOutput L fixed 22PON_FLOFL power supply (Grid and Filament) controlH: ON, L: OFF 2333NCONot usedOutput L fixed 34ROTARY_CWIEncoder pulse inputDetects pulse width MICROCOMPUTERS TERMINAL DESCRIPTION COMPONEN

35、TS DESCRIPTION KAC-PS1D/X1R 6 Pin No.Pin NameI/OApplication Truth Value Processing Operation Description Table 35ROTARY_CCWIEncoder pulse inputDetects pulse width 3638NCONot usedOutput L fixed 39REF5V_OUTOSupplies to AVREF (pin 47)Output H fixed 40,41NCONot usedOutput L fixed 42VFD_INHOPanel VFD dri

36、ver INHDriver output switching 43VFD_CEOPanel VFD driver CECommand control terminal of the driver 44VFD_DATA_MOPanel VFD driver data line-com driver input 45VFD_DATA_SIPanel VFD driver data line-com driver input 46VFD_CLKOPanel VFD driver communication CLKCommunication clock 47AVREF-DA REF voltageRe

37、ceives the reference voltage from pin 39. 48AVSS- 49IMP_DETIDetects load IMP at SP terminal Reads the impedance and turns on the limiter when it is 1 load. 50TEMP2I Temperature detection 1 (at output TR side) Displays the temperature and overheat protection. (For display and protection) 51TEMP1I Tem

38、perature detection 1 (at power supply side) Displays the temperature and overheat protection. (For display and protection) 52NCONot usedOutput L fixed 53AD_VIDetects BU voltage (For display)Displays the voltage and condition. 54NCONot usedOutput L fixed 55AD_IIDetects primary current (For display)Co

39、nverts into the current and displays current value. 56MUTE1OMute control of the amplifier input stageL: MUTE1 ON, H: MUTE1 OFF, Initial condition “L” 57NCONot used 5860NCONot usedOutput L fixed 61ATT1OOutput signal level attenuation controlL: Output attenuation, Initial condition “L” 62ATT2OOutput s

40、ignal level attenuation controlL: Output attenuation, Initial condition “L” 63LIMITO Limits the peak value of the D-class amplifier wClips the audio signal quickly with “H” input signal 64DC_DETIOutput DC OFFSET voltage detectionEnters into the voltage error protection operations. Truth value table

41、q FAN (Pin 5) Calculated temperature based on the detected voltage at TMP_1 (pin 31)Note Lower than 35CRemains as LIn the case of “H” output, it recovers to “L” when the temperature 35C or higherH outputdecreases to 30C. w LIMIT (Pin 63) Voltage detected at IMP_DET (pin 49)Note Lower than 3.8VRemain

42、s as L Recovers by P-CON OFF or RST. 3.8V or higherH output MICROCOMPUTERS TERMINAL DESCRIPTION KAC-PS1D/X1R 7 TEST MODE How to enter the test mode and how to clear the test mode How to enter In the backup connection condition (when the battery is being connected), turn ON the P_CON while keep pushi

43、ng the rotary push key. How to clear P_CON OFF or reset to clear the mode. (Clear the mode even in case of the protection.) * Do not clear the mode if the protection recovers automatically. Items in the test mode and test operations INFORMATION display (Display of conditions) In the test mode, the f

44、ollowing items can be checked in addition to the normal INFORMATION display. Each item can be selected with the rotary encoder and the set- tings can be changed with the push key. OVER HzdB DIRG OVER HzdB Initial condition OVER HzdB . OVER HzdB OVER HzdB OVER HzdB OVER HzdB FFO OVER HzdB NO OVER Hzd

45、B 0TTA OVER HzdB 1TTA OVER HzdB 2TTA Turn Push Turn Turn OVER HzdB FFO OVER HzdB NO Turn OVER HzdB FFO OVER HzdB NO OVER HzdB 203.V OVER HzdB V34 .1 OVER HzdB A81 OVER HzdB C87 Turn Turn OVER HzdB NAF Push OVER HzdB TTA Push OVER HzdB IMTIL Push OVER HzdB DEL Push OVER HzdB REV OVER HzdB TLOV OVER H

46、zdB R TRUC OVER HzdB PMET OVER HzdB OMED . . Additional items shown in the test mode Condition display Items shown in the normal mode Segment check of FL display tube Change the display segment in the following sequence of order. All on GRID1 on GRID2 on GRID3 on All of Check of FAN switching In the

47、 FAN switching mode, it is possible to select to rotate or stop the FAN regardless of the present temperature. Check of ATT switching In the ATT switching mode, it is possible to switch the ATT regardless of the present temperatur. Check of LIMIT switching In the LIMIT switching mode, it is possible

48、 to switch LIMIT regardless of the presently detected impedance of speaker. Check of LED switching In the LED switching mode, it is possible to select to turn on or off the LED. Version display It is possible to check the version of the -com. KAC-PS1D/X1R 8 CIRCUIT DESCRIPTION 0V 0V D176 D174 D175 D

49、173 D172 IC22(1/2) (2/2) IC22 RESONANCE DET. TP33 TP5 TP103 3 2 1 8 5 4 6 7 3300P C198 47K R339 0.01 C200 0.033 C201 0.033 C202 1K R346 1K R347 2.2K R345 3300P C199 47K R340 22K R343 10K R344 0.033 C203 0.022 C204 10K R348 R341 47K R342 47K C207 0.01 C208 0.01 TP9TP30 TP6 TP7 TP31TP32 TP27 from SP+ OUTPUT TERMINAL from SP- OUTPUT TERMINAL to COMPARATOR BPF 14.4V 4.9V 2.5V 13.4V Q51 Q50 Q52 Q53 Q47Q55 Q54 Q48 D48 D49 D46 TP289 1 R73 1 R80 1 R81 47u25 C47 2.2K R79 4.7 R98 4.7 R97 4.7 R96 4.7 R95 4.7 R94 4.7 R88 4.7 R91 4.7 R92