Kenwood KACPS-810-D Service manual

MONO POWER AMPLIFIER

KAC-X810D/PS810D

SERVICE MANUAL

● KAC-X810D

MONO POWER AMPLIFIER

INPUT SENSITIVITY(V)

B.M.S. FREQUENCY(HZ)

eXcelon

LPF FREQUENCY(HZ)

B.R.F. FREQUENCY(HZ)

B51-7897-00 (S) 3404

0.52

0.3

(MIN)5

0.2(MAX)

40 100

50 200

40 200

V-COLOR

Heat sink (F01-1684-01)

FUSE(25AX3)

∗ Refer to the PARTS LIST

B.M.S

OFF

REMOTE +12dB

BAND REJECT

PHASE INFRASONIC

-6dB

NORMAL REVERSE 15Hz 25HzOFF ON

OFF -12dB

POWER IN

GND

BATT. P.CON

SPEAKER OUTPUT

LINE IN LINE OUT

∗ Dressing panel (A21-4190-02)

EXT.AMP.CONT.

Mounting hardware (J21-9864-04) x 4

Screw set (N99-1577-15)

Accessory (W01-1586-05)

Cover (F07-1110-01) x 2

INPUT

OUTPUT

ISOLATION AMPLIFIER INPUT SENS

I.S.F. B.R.F INV

B.M.S L.P.F MUTE

AMP

COMPEARATE

POWER AMP

OFFSET

FREQUENCY

DRIVER

MUTE TRIANGLE

WAVE

OVERLOAD DETECTION

DC OFFSET

MICRO-COMPUTER

DETECTION

PCON

OVER V OLTA GE PROTECTION

DOWN VOLTAGE

SWITCH CONVERTER

DC/DC

+15V -15V AVR

AVR

+5V

5V SWITCH

POWER

FUSE

V-LED

PROTECTION

THERMAL

OUTPUT

SPEAKER

PCON

BATTERY

B.BOOST

CONTROL

IC1

IC2 IC3 IC3 IC4,13 IC7 Q6

IC8,9

Q53,56IC12

IC8,9Q4IC15

IC6

TH2,3

Q62,63

Q34-37

Q73

Q65

Q57,61

Q10,11

S3 S4

IC14 Q68,69

Q14-25,39-46

+5V

+15V

-15V

+B/-B/+14V

KAC-X810D/PS810D

BLOCK DIAGRAM

COMPONENT DESCRIPTION

● AUDIO UNIT (X09-5440-10)

Component Purpose • Function

IC1 Isolation AMP IC2 Infrasonic AMP IC3 (1/4-3/4) IC3 (4/4) Inverter IC4,13 Bus boost AMP IC5 Recet IC IC6 Microcomputer IC7 Low-pass filter AMP IC8 (1/2) IC9 (1/2) IC8 (2/2) Summing AMP IC9 (2/2) PWM waveform generator circuit IC10,11 Dead time generator circuit IC12 Used for overcurrent detection IC14 DC/DC converter IC IC15 Q59,60 Q1-3 Used for LED driver Q4,6 D6,7 Q5 Used for SW +5V Q7,9 D11 Q10,12 D14 Q11,13 D15 Q14,16-19 Used for VI conversion Q15,D20 Used for +15V AVR Q20,21 Used for cascade Q22,24 D27 Q23,25 Used for D-AMP ON/OFF Q26-29 Q34-37 MOS FET for DC/DC Q68,69 Q30-33 Q39-42 Q38,58,64 D32,42,45,46 Q43-46 MOS FET (Power FET) Q47-50 MOS FET Driver Tr Q51,52 Q54,55 Q53,56 DC detection Q57,61 D33 Q62,63 Power ON Q65,D34 Used for overvoltage detection Q66 Used for B.M.S Q70,71 Used for Pulling –15V Q73,D37 Used for reduced voltage detection D1 Variable color LED D2-5 Used for static electricity prevention

Band rejection AMP

Chopping wave generator circuit

Used for B.M.S frequency offset

Used for MUTE

Used for +5V AVR

Used for +15V AVR

Used for –15V AVR

Gate failure prevention circuit

MOS FET Driver Tr

Overcurrent Detector Circuit

Used for output current VI conversion

Used for P-CON

KAC-X810D/PS810D

Component Purpose • Function

D8-10,12,13 D21,22,40,41 Used for rectification (±B)

D23-26 Used for rectification (+15V) D28,29 Used for ±8.2V AVR D30,31 Used for MOS FET Drive

D35,36,38 D39 Used for 5.1V AVR

D43,44 ±10V AVR

Used for the limitation of a chopping wave voltage

Protection circuit (error connection) for the prevention of reverse connection

KAC-X810D/PS810D

MICROCOMPUTER'S TERMINAL DESCRIPTION

● IC6 (AUDIO UNIT : X09-5440-10)

Pin No.

Pin Name I/O Description Processing Operation

1 +5V_SW O Low-current control Lo: SW 5V ON 2 N.C. - Not used 3 FAN - Not used 4 N.C. - Not used 5

D_VOLTAGE 6 V_DOWN I Reduced voltage detection Hi: Reduced voltage detection 7

D_CURRENT 8

AB_VOLTAGE 9

AB_CURRENT

10 BLUE O Blue control of variable illumination Hi: Illumination lighting 11 GREEN O Green control of variable illumination Hi: Illumination lighting 12 RED O Red control of variable illumination Hi: Illumination lighting 13 TEST 14 RST - Reset signal input Lo: Reset operation 15 XIN - High-frequency oscillating connection pin 16 XOUT - High-frequency oscillating connection pin 17 VSS - 0V (GND) 18 VAREF - A/D reference voltage 19 ADIN_1 I Temperature detection 1 (A/D input) Hi: Abnormal temperature detection 20 ADIN_2 I Temperature detection 2 (A/D input) Hi: Abnormal temperature detection 21 ADIN_3 I Temperature detection 3 (A/D input) Hi: Abnormal temperature detection 22 ADIN_4 I Temperature detection 4 (A/D input) Hi: Abnormal temperature detection 23 N.C. - Not used 24 BASS 12dB I B.M.S +12dB fixed Hi: B.M.S fixed +12dB 25

BASS REMO

BASS

OFF I BOOST OFF Hi: BOOST OFF 27 D_POWER O D-class Amp block control Hi: D-class Amp block ON 28 N.C. - Not used 29 N.C. - Not used 30 POWER O AMP power control Hi: SW 14.4V ON 31 COM_HU I Pulse measurement of H/U communication 32

OFFSET CON

BASS_CON_A

BASS_CON_B 35 N.C. - Not used 36 N.C. - Not used 37 STANBY I Stop mode canceled by Pcon ON Lo: Pcon ON or BUP overvoltage detection 38 N.C. - Not used 39 N.C. - Not used 40 VDD - Positive potential 41 TACT SW I Switch input for color determination Hi: SW ON 42 MUTE2 O Mute control in driver stage Lo: MUTE2 ON 43 MUTE1 O Mute control in amplifier block input stage Lo: MUTE1 ON 44 N.C. - Not used

I D-class overvoltage detection Lo: Overvoltage detection

I D-class overcurrent detection Lo: Overcurrent detectction when D power ON I AB-class overvoltage detection Lo: Overvoltage detection I AB-class overcurrent detection Hi: Overcurrent detection

I B.M.S switched from H/U Hi: B.M.S switched from H/U

O Offset control of BASS BOOST frequency Hi: OFFSET ON O BASS BOOST control A O BASS BOOST control B

CIRCUIT DESCRIPTION

1. PWM Signal Waveform Generation

A and B are sent to the comparator so as to generate the PWM waveform of C. (A clock of 50% in duty ratio is obtained when B is 0.)

KAC-X810D/PS810D

The waveform of C is divided into upper and lower gate waveforms. An OFF section is created so that the upper gate waveform is not turned on simultaneously with the lower gate waveform.

A: Chopping wave B: Analog input C: PWM Signal

Chopping wave generator circuit

150

R270

D43

R77

D12

D13

Audio signal

+10.3V

820

D10

+10.3V

R70 10K

C56

1800P

IC8 (1/2)

10.3V

R69

C42

1u50

R75

R71 3.3K

C59

0.01

R106

R78

82K

SUMMING AMP

10K

R86

2 3

R58 33K

4.7K

MUTE

Analog-fed back from the output stage.

C47 0.1

C62

R83

C49

0.01

9 8

R73

1.5K

10.3V

5 6

C57 47P

R100 680K

R101

47u 10V

68K

10.3V

IC9 (1/2)

IC9(2/2)

C58

PWM WA VE GEN CIRCUIT

IC8 (2/2)

R105

4.7K

R108

R107

24K

3900P

1.5K

UP DOWN UP DOWN UP

Dead Time

The dead time is determined by this time constant.

IC9 (2/2)

R66

+5V

D39

+5V +5V

1 2

510

C36 47u10

IC10

(1/4)

(2/4)

R85 10K

C55

39P

IC10

13 12

(4/4)

DEAD TIME GEN CIRCUIT

R84 10K109

D16

C54

IC10

(3/4)

39P

13 12

IC11D17 (2/4)

D19

R119

IC11 (1/4)

R118

VI CONV

Upper gate

Lower gate

D18

KAC-X810D/PS810D

CIRCUIT DESCRIPTION

2. D-AMP Block

The voltages at the upper and lower gates are currentconverted using Q14 and Q16 to Q19. The converted current is returned to a voltage using R167 and R168 to drive MOSFET by Q30 to Q33 and Q39 to Q42 (push-pull operation). The PWM waveform swung up to ±B is output to A and converted into analog using an LC filter.

Note: Q24 turns off the upper gate voltage when the lower

gate voltage is turned on. (It prevents the voltages from being turned on simultaneously.)

D-AMP ON/OFF circuit

R166

Q23,25

D-AMP ON/OFF

4.5V

C81

47K

C77

330P

1/2W

R150 1K

+93.5V

0.01

D27

Q38

R155

R174

R157 1K

5.1K

Upper gate

Lower gate

R123

Q14

R124 750

Q16

R129

510 1/2W

Q17

1/2W

R130 750

R134

510 1/2W

R137

51 1/2W

Q18

Q19

CASCADE Q20

Q21

270 1/2W

R144

10 1/2W

R145

10 1/2W Q17-19

VI CONV

R146

1/2W

R147

1/2W

93.5V

Q22

GATE MISTAKE PREVENTION CIRCUIT

R153

330

Q23

1/2W

R162

1.5K

R164

1K 1/2W

Q25

1/2W

10K

R179

10K

1/2W

Q24

R168

R167

1.2K

330

Q33

Q30

Q31

1/2W

Q32

1/2W

Q30,31,39,40

MOS FET DRIVER

1/2W

R170 100

1/2W

R171 100

Q42

Q32,33,41,42

MOS FET DRIVER

Q39

R176 100

Q40

Q41

R177 100

1/2W

80.0V

80V

R193 0.1 2W

Q43

R272 2.2

R273

2.2

R194 47K

Q44

R274 2.2

R275

2.2

47K

R195

R196 0.1 2W

R201 0.1 2W

R199 0.1 2W

R197 0.1 2W

Q43,45

POWER FET

R204 0.1 2W

R198 0.1 2W

R200 0.1 2W

R208 0.1 2W

R205 0.1 2W

Q45

Q46

R209 0.1 2W

R206 0.1 2W

–B

SP OUT

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