KEF PSW 2000 User manual

SERVICE MANUAL
CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
PARTS LIST:
PRE AMPLIFIER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-10
POWER AMPLIFIER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11
VOLTAGE SELECTOR BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
PRE AMP AND POWER AMP ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
8” SPEAKER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
POWER CORD CABLE ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16
PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
EXPLODED VIEW DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18-19
POWERED SUBWOOFER

POWERED SUBWOOFER
2
SPECIFICATIONS
System Specifications
Frequency Response 70-20K Hz
Sensitivity 85+/-2dB
Power Handling 70W Max
Dimension (W x D x H) 198 x 130 x 150 mm
Weight 2.1kg
HF 12mm (0.5") tweeter
LF 100mm (4")
Crossover Frequency 3KHZ
Impedance 4 OHM
Woofer Specifications
Rated Impedance 3.8 ohms +/- 0.8 at 1V 500 Hz
Voice coil DCR 3 +/-0.15 ohm
Sweep Test Sine Wave 4V at 20-20K Hz
Resonant Frequency (Fo) 65 +/- 15 Hz
Sensitivity 85 dB/W/m
Rated Power Input 30W
Maximum Power Input 60W
Power Test 15W Music Max/Channel
30W RMS/Channel
(The rated power is verified by performing power handling test by feeding
rated output with "IEC268-5" for 8 hours)
Main Magnet Ø74 x Ø38 x 15mm
Bucking Magnet Ø55 x Ø26 x 9mm
Tweeter Specifications
Rated Impedance 4+/-0.8 OHM at 1V 5K Hz
Voice coil DCR 3.2 +/-0.16 OHM
Sweep Test Sine Wave 1 V at 500-20K Hz
Resonant Frequency (Fo) 2500 +/- 240 Hz
Sensitivity 89 +/-2dB/W/m
Frequency Response Fo - 20K Hz
Rated Power Input 30W
Main Magnet Ø10 x 2mm
Magnet Material N35

3
POWERED SUBWOOFER
SPECIFICATIONS
Subwoofer Specifications
Typical LIMIT UNIT
1) CONTINUOUS POWER 120 115 W
(@ 90Hz, 0.1% THD)
2) THD (@90Hz 110W ) 0.08 0.09 %
3) CLIPPING POWER
(Output 1% THD @ 90Hz ) 125 120 W
4) INPUT SENSITIVITY
@ 120W 4 ohm 70Hz
LINE . INPUT VOL . Max 95 +/-10% mV
SPK . INPUT VOL . Max 0.8 +/-10% V
5) S/N @ 12W 75Hz 90 85 dB
@ 120W 75Hz 100 95 dB
( A-WEIGHT, LINE INPUT )
6) LOW PASS FILTER @ 75Hz
Freq VOL Set to Max. Low -3dB 50 +/-10% Hz
Freq VOL Set to Max. Upper -3dB 115 +/-10% Hz
7) LOW PASS FILTER @ 60Hz
Freq VOL Set to Min. Low -3dB 45 +/-10% Hz
Freq VOL Set to Min. Upper -3dB 80 +/-10% Hz
8) LOW PASS FILTER ROLL-OFF
Freq VOL Set to Max. 22 +/-2 dB
9) LOW PASS FILTER ROLL-OFF
Freq VOL Set to Min. 22 +/-2 dB
10) LINE OUTPUT @1V INPUT
HI PASS FILTER -3dB
( LINE IN @ 1KHz )
Freq VOL Set to Max. 170 +/-10% Hz
Freq VOL Set to Min. 70 +/-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. 18 +/-2 dB
12) LINE OUTPUT
LINE IN @ 1KHz 1V INPUT
( 0 dB O/P Ref )
Freq VOL Set to Max. 1.2 +/-10% V

POWERED SUBWOOFER
4
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
@ 4 ohm Load
( 0dB 1W 0/P Ref )
15) INPUT IMPEDANCE RCA 25K 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
@ 75-85Hz 10V O/P 0 Degree Ref:
PHASE VOL SET Min to Max
19) HUM & NOISE ( 17Hz -17KHz Filter ) 3 5 mV
1OK OHM LOAD @ INPUT
LEVEL VOL SET to Max
FREQ VOL & PHASE VOL SET to min
20) Current Consumption
UL 115 Vac @ 120W OUTPUT 2.0 2.5 A
@ IDLE .07 .09 A
CE 230 Vac @ 120W OUTPUT 1.5 2.0 A
@ IDLE .04 .06 A
UK 230 Vac @ 120W OUTPUT 1.5 2.0 A
@ IDLE .04 .06 A

5
POWERED SUBWOOFER
SPECIFICATIONS

POWERED SUBWOOFER
6
SPECIFICATIONS

7
POWERED SUBWOOFER
SPECIFICATIONS

POWERED SUBWOOFER
8
SPECIFICATIONS

9
POWERED SUBWOOFER
PARTS LIST
PRE AMP SECTION
PRINTED CIRCUIT BOARD ASSEMBLY
QTY PART NO DESCRIPTION LOCATION
1150F-101K-5-IEA CC 50V 100PF 10% RL 5X3 C29
1150F-104M-N-FD CC 50V 0.1µƒ 20% RLF C27
2150F-271K-5-IEA CC 50V 270PF 10% RL 5x3 C3,11
4150F-334M-N-JJA CC 50V 0.33µF 20% RLF MONO C4,5,12,13
7153H-104K-5-QUA CM 100V 0.1µF 10% RL 9X11 CENTRALAB C7,15,17,18,19,20,22
2153H-333K-5-MRA CM 100V 0.033µF 10% RL 7X9.5 C8,16
2153H-683K-5-PSA CM 100V 0.068µF 10% RL C64,65
1157C-477M-5-OU CE 10V 470µF 20% RL 8X11 C24
2157D-107M-5-KW CE 16V 100µF 20% RL 6x12 C21,25
1157D-476M-5-IU CE 16V 47µF 20% RL 5x11 C26
2157E-106M-5-IU CE 25V 10µF 20% RL 5x11 C23,30
5157F-225M-5-IU CE 50V 2.2µF 20% RL 5x11 C1,2,9,10,28
1157F-225M-5-IU CE 50V 2.2µF 20% RL 5x11
12101-1357-0 WAFER JM2411-8 8PIN CN3
12101-9790-0 4RCA JACK HSP-204V-03 GP RCA1
83131-6140-0 IC BA4560 ROHM U1,2,3,4,5,6,7,8
13700-4536-RG L-115W EGW/209EGW RED/GR ELE-LED02 LED1
44701-102J-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, 62, 70, 76, 79,
24701-104J-2 RCF 1/8W 100K 5% AT R7,30
14701-125J-C RCF 1/8W 1.2M 5% ATS R64
24701-153J-2 RCF 1/8W 15K 5% AT R48,52
14701-162J-2 RCF 1/8W 1.6K 5% AT R56
84701-222J-2 RCF 1/8W 2.2K 5% AT R12,13,35,36,49,53,66,68,
14701-224J-2 RCF 1/8W 220K 5% AT R78
14701-225J-2 RCF 1/8W 2.2M 5% AT R65
64701-273J-2 RCF 1/8W 27K 5% AT R17, 22, 40, 45, 51, 55
44701-303J-2 RCF 1/8W 30K 5% AT R1,24,50,54,
14701-391J-2 RCF 1/8W 390R 5% AT R57
24701-471J-2 RCF 1/8W 470R 5% AT R63,74
44701-472J-2 RCF 1/8W 4.7K 5% AT R58,59,69,72,
14701-563J-2 RCF 1/8W 56K 5% AT R77
14701-682J-2 RCF 1/8W 6.8K 5% AT R37
14701-683J-2 RCF 1/8W 68K 5% AT R67
44718-101J-C-X RMF 1W 100R 5% ATS METAL OXIDE R8,9,31,32
14750-5510-0 VR 20KBX2 VR16G20K15B20K L=15MM VR1
14750-5520-0 VR 20KAX1 VR16N20K15A20K L=15MM VR2
14750-5530-0 VR 10KBX1 VR16N20K15B10K L=15MM VR3
14837-3V36-2 DZ 1/2W +-5% 3.3V TEMIC AT Z3
24837-5V16-2 DZ 1/2W 5.1V "TEMIC" AT Z1,2
24840-8060-2 DIODE 1N4148 NS D1,2
34860-8710-5 TR 9012H Q3,4,7
44860-8720-5 TR 9013H SAMSUNG Q1,2,5,6
15200-3281-0-06 SW COMAX SK-22D01-SG6-T-NS-IK SW1

POWERED SUBWOOFER
10
PARTS LIST
PRE AMP SECTION
PRINTED CIRCUIT BOARD ASSEMBLY
CONTINUED
QTY PART NO DESCRIPTION LOCATION
24701-123J-2 RCF 1/8W 12K R20, 43
24701-912J-2 RCF 1/8W 9.1K R4, 27
17010-2221-0 3 PIN SHIELD WIRE ASSY L=130MM CN1
17010-2222-0 3 PIN FLAT CABLE ASSY L=100MM CN2
17011-3240-0 2254 1533 #26 2X2PIN BRN 100MM 1-51-112 CN4
27011-4570-0 AMP108U AWG26 180MM BRWN NALX2 1-51-274CN5,6
28910-0042-0 CE 50V 300µF RL 10% NON-POLARITY C6,14
11725-296A-0002 PCB POWER AMP REV:E FC380C
4150F-101K-5-IEA CC 50V 100P 10% RL 5X3 C39,40,64,65
2150F-104M-N-FD CC 50V 0.1µF 20% RLF C53,54
1150F-334M-N-JJA CC 50V 0.33µF 20% RLF MONO C36
1150F-470K-5-IEA CC 50V 47P 10% RL 5X3 C38
2150F-471K-5-IEA CC 50V 470P 10% RL 5x3 C32,33
2150F-681J-5-OI CC 50V 680PF 5% RL 8X5 C42,43
2150H-472M-5-IE CC 100V 4700PF 20% RL 5X3 TEC C61,62
1153H-102K-5-INA CM 100V 0.001µF 10% RL 5X7.5 C37
3153H-104K-5-QUA CM 100V 0.1µF 10% RL 9X11 CENTRALAB C35,57,58
1153H-224K-5-VYA CM 100V 0.22µF 10% RL 11.5X13 C47
1153I-154J-9-NL CM 63V 0.15µF 5% RB 7.5x6.5 C31
2157D-227M-5-KW CE 16V 220µF 20% RL 6x12 C55,56
1157E-106M-5-IU CE 25V 10µF 20% RL 5x11 C50
2157F-105M-5-IU CE 50V 1µF 20% RL 5x11 C34,48
2157F-225M-5-IU CE 50V 2.2µF 20% RL 5x11 C41,66
1157F-474M-5-IU CE 50V 0.47µF 20% RL 5X11 C51
2157I-107M-5-SX CE 63V 100µF 20% RL 10X12.5 C44,45
1157I-476M-5-OV CE 63V 47µF 20% RL 8X11.5 C52
1157Q-476M-5-LUA CE 35V 47µF 20% RL 6.5X11 ELNA C49
11806-2393-0 TT-9904 LE 1012A 1X12TX6MM SPRING COIL L1
32101-1231-0 SPADE TERMINAL 6.3X0.8 STRAIGHT AC1.AC2,VO
13130-3020-0 IC LM7915CT REGULATOR U15
13130-3030-0 IC LM7815CT REGULATOR U14
13130-3550-0 IC TA7317P U13
13130-4080-0 IC TL072CP DUAL FET OP AMP T1 U12
13130-9150-0 IC LM3080N OTA NATIONAL U9
23131-7220-0 IC TL062 LOW POWER JFET U10,11
24132-1551-0 TERMINAL OUT PUT SPK+, SPK-
14500-8090-0 RELAY RUDH-SH-124D "GOOD SKT" RLY1
POWER AMP SECTION
PRINTED CIRCUIT BOARD ASSEMBLY
QTY PART NO DESCRIPTION LOCATION