KEF PSW-1000 Service manual

SERVICE MANUAL

CONTENTS

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

PARTS LIST:

PRE AMPLIFIER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6

POWER AMPLIFIER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7

VOLTAGE SELECTOR BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

PRE AMP AND POWER AMP ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

8” SPEAKER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

POWER CORD CABLE ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-12

PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

EXPLODED VIEW DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-16

POWERED SUBWOOFER

SPECIFICATIONS

GENERAL SPECIFICATIONS

Typical LIMIT UNIT

1) CONTINUOUS POWER 85 80 W (@ 85Hz, 0.17% THD)

2) THD (@85Hz 75W ) 0.08 0.15 %

3) CLIPPING POWER (Output 1% THD) 90 85 W

4) INPUT SENSITIVITY @ 85W 4 ohm 85Hz LINE . INPUT VOL . Max 95 +/-10% mV SPK . INPUT VOL . Max 1.7 +/-10% V

5) S/N @ 8W 85Hz 85 80 dB @ 80W 85Hz 95 88 dB ( A-WEIGHT, LINE INPUT )

6) LOW PASS FILTER @ 85Hz Freq VOL Set to Max. Low -3dB 60 +/-10% Hz Freq VOL Set to Max. Upper -3dB 130 +/-10% Hz

7) LOW PASS FILTER @ 65Hz Freq VOL Set to Min. Low -3dB 50 +/-10% Hz Freq VOL Set to Min. Upper -3dB 85 +/-10% Hz

8) LOW PASS FILTER ROLL-OFF Freq VOL Set to Max. 18 +/-2 dB

9) LOW PASS FILTER ROLL-OFF Freq VOL Set to Min. 18 +/-2 dB

10) LINE OUTPUT @1V INPUT HI PASS FILTER -3dB ( LINE IN @ 1KHz ) Freq VOL Set to Max. 165 +/-10% Hz Freq VOL Set to Min. 65 +/-10% Hz

11) LINE OUTPUT @1V INPUT HI PASS FILTER ROLL-OFF LINE IN @ 1KHz ( 0 dB O/P Ref ) Freq VOL Set to Max. 12 +/-2 dB Freq VOL Set to Min. 21 +/-2 dB

12) LINE OUTPUT LINE IN @ 1KHz 1V INPUT ( 0 dB O/P Ref ) Freq VOL Set to Max. 1.3 +/-10% V

POWERED SUBWOOFER

SPECIFICATIONS

13) SPEAKER OUTPUT HI PASS FILTER -3dB 130 +/-10% Hz ( SPEAKER IN @1KHz ) @ 4 Ohm Load

14) SPEAKER OUTPUT HI PASS FILTER ROLL-OFF 7 +/-1 dB SPEAKER IN @ 1KHz ( 0dB 1W 0/P Ref ) @ 4 Ohm Load

15) INPUT IMPEDANCE RCA 20K 15K OHM SPEAKER 200 +/-10 OHM

16) AUTO TURN ON LEVEL 2.5 +/-1 mV

17) AUTO OFF DELAY TIME 50 40 Min

18) PHASE ADJUSTABLE 0- 180 0-170 Degree @ 55-65Hz 10V O/P 0 Degree Ref: PHASE VOL SET Min to Max

19) HUM & NOISE ( 17Hz -17KHz Filter ) 3 5 mV 10K OHM LOAD @ INPUT LEVEL VOL SET to Max FREQ VOL & PHASE VOL SET to min

20) Current Consumption UL 115 Vac @ 90W OUTPUT 1.5 1.6 A

@ IDLE .05 .07 A

CE 230 Vac @ 90W OUTPUT 0.8 1.0 A

@ IDLE .03 .04 A

UK 230 Vac @ 90W OUTPUT 0.8 1.0 A

@ IDLE .03 .04 A

WOOFER SPECIFICATIONS

Rated Impedance 4 ohms +/- 0.8 at 1V 200 Hz Voice coil DCR 3.2 +/-0.16 ohm Sweep Test Sine Wave 6V at 20-20K Hz Resonant Frequency (Fo) 40 +/- 8 Hz Sensitivity 89 dB/W/m Rated Power Input 80W Maximum Power Input 160W Power Test 40W Music Max/Channel

80W RMS/Channel

(The rated power is veriﬁed by performing power handling test by feeding

rated output with "IEC268-5" for 8 hours) Main Magnet Ø90 x Ø45 x 15mm Bucking Magnet Ø90 x Ø45 x15mm

POWERED SUBWOOFER

SPECIFICATIONS

POWERED SUBWOOFER

PARTS LIST

PRE AMP SECTION

PRINTED CIRCUIT BOARD ASSEMBLY

QTY PART NO DESCRIPTION LOCATION

1 150F-101K-5-IEA CC 50V 100PF 10% RL 5X3 C29 1 150F-104M-N-FD CC 50V 0.1µF 20% RLF C27 2 150F-271K-5-IEA CC 50V 270PF 10% RL 5x3 C3,11 4 150F-334M-N-JJA CC 50V 0.33µF 20% RLF MO C4,5,12,13 7 153H-104K-5-QUA CM 100V 0.1µF 10% RL 9X11 CENTRALAB C7,15,17,18,19,20,22, 2 153H-333K-5-MRA CM 100V 0.033µF 10% RL 7X9.5 C16,808 2 153H-683K-5-PSA CM 100V 0.068µF 10% RL 8.5X10 C62,63 1 157C-477M-5-OU CE 10V 470µF 20% RL 8X11 C24 2 157D-107M-5-KW CE 16V 100µF 20% RL 6x12 C21,25 1 157D-476M-5-IU CE 16V 47µF 20% RL 5x11 C26 2 157E-106M-5-IU CE 25V 10µF 20% RL 5x11 C23,30 5 157F-225M-5-IU CE 50V 2.2µF 20% RL 5x11 C1,2,9,10,28 1 2101-9790-0 4RCA JACK HSP-204V-03 GP RCA1 1 2113-1719-0 8P SPEAKER TERMINAL BOARD PT-801-01 SPK1 1 2600-3005-0800 METAL WASHER M3X0.5X8MM ZNC D11 8 3131-6140-0 IC BA4560 ROHM U1,2,3,4,5,6,7,8 1 3700-4536-RG L-115W EGW/209EGW RED/GR ELE-LED02 LED1 4 4701-102J-2 RCF 1/8W 1K 5% AT R11,34,71,73 23 4701-103J-2 RCF 1/8W 10K 5% AT R3, 6, 10, 15, 16, 18, 19, 21, 23,

26, 29, 33, 38, 39, 41, 42, 44, 46,

60, 61, 62, 70, 76, 79 4 4701-123J-2 RCF 1/8W 12K 5% AT R5,20,28,43 1 4701-125J-C RCF 1/8W 1.2M 5% ATS R64 2 4701-153J-2 RCF 1/8W 15K 5% AT R48,52 1 4701-162J-2 RCF 1/8W 1.6K 5% AT R56 8 4701-222J-2 RCF 1/8W 2.2K 5% AT R12,13,35,36,49,53,66,68 1 4701-224J-2 RCF 1/8W 220K 5% AT R78 1 4701-225J-2 RCF 1/8W 2.2M 5% AT R65 6 4701-273J-2 RCF 1/8W 27K 5% AT R17,22,40,45,51,55 4 4701-303J-2 RCF 1/8W 30K 5% AT R1,24,50,54 2 4701-334J-2 RCF 1/8W 330K 5% AT R7,30 1 4701-391J-2 RCF 1/8W 390R 5% AT R57 2 4701-471J-2 RCF 1/8W 470R 5% AT R63,74 4 4701-472J-2 RCF 1/8W 4.7K 5% AT R58,59,69,72 1 4701-563J-2 RCF 1/8W 56K 5% AT R77 2 4701-682J-2 RCF 1/8W 6.8K 5% AT R14,37 1 4701-683J-2 RCF 1/8W 68K 5% AT R67 2 4701-912J-2 RCF 1/8W 9.1K 5% AT R4,27 4 4718-101J-C-X RMF 1W 100R 5% ATS METAL OXIDE R8,9,31,32 1 4750-5510-0 VR 20KBX2 VR16G20K15B20K L=15MM VR1 1 4750-5520-0 VR 20KAX1 VR16N20K15A20K L=15MM VR2 1 4750-5530-0 VR 10KBX1 VR16N20K15B10K L=15MM VR3 1 4837-3V36-2 DZ 1/2W +-5% 3.3V TEMIC Z3 2 4837-5V16-2 DZ 1/2W 5.1V "TEMIC" AT Z1,2 2 4840-8060-2 DIODE 1N4148 NS D1,2 3 4860-8710-5 TR 9012H Q3,4,7

+ 11 hidden pages