Northridge E250P Manual de usuario

Amplifier

250 Watts

High-Pass

Frequency

Dimensions

20.1kg

Service Manual

Northridge E250P/230

Power (RMS):

Driver: 300mm (12") PolyPlas

Inputs: Line Level (switchable to LFE)

and Speaker Level with

5-way binding posts

Outputs: Speaker Level, High-Pass

5-way binding posts

Low-Pass

Frequency: Continuously variable

from 50Hz – 150Hz

Frequency: 150Hz when using

speaker-level output

Response: 25Hz – low-pass

crossover setting

(H x W x D): 500mm x 365mm x 435mm

Weight:

6,20

8,13

14,15,16

2,3

Item Model Part number Description Qty

1 E250PBLK/BE/CH 315953-001 BAG,ZIPLOCK,9X12 1,0000

2 E250P/230 333249-001 CUP,GRL-HLS 4,0000

3 E250PBE/CH 333249-003 CUP,GRL-INTRMZO 4,0000

4 E250PBLK/BE/CH 336486-001 FT,MOLDED,W/RBR INSRT 4,0000

5 E250PBLK/BE/CH 336799-001 ASY,PTB-STUDIO PB12 1,0000

6 E250PBLK/BE/CH 338125-002 ASY,LED-E150P/E250P 1,0000

7 E250PBLK/BE/CH 338128-002 ASY,XDUCER,WFR,12", E 1,0000

8 E250PBLK/BE/CH 338381-001 WARR,JBL,1YR/5YR,NEW 1,0000

9 E250PBLK/BE/CH 338836-001 LBL, COUNTRY OF ORIGI 2,0000

10 E250PBLK/BE/CH 350161-001 LBL,JBL"Assem. in Mex 1,0000

11 E250PBLK/BE/CH 351243-001 RING,TRIM,12"-E250P 1,0000

12 E250PBLK/BE/CH 351245-002 ASY,AMP-E250P/230V 1,0000

13 E250PBLK/BE/CH 351248-001 MNL,OWNER-E150P/E250P 1,0000

14 E250P/230 351249-004 CTN,OUTER,MSTR-E250P/ 1,0000

15 E250PBE/230 351249-005 CTN,OUTER,MSTR-E250BE 1,0000

16 E250PCH/230 351249-006 CTN,OUTER,MSTR-E250CH 1,0000

17 E250PBLK/BE/CH 351252-001 PAD,END,TOP-E250P SER 1,0000

18 E250PBLK/BE/CH 351252-002 PAD,END,BTM-E250P SER 1,0000

19 E250PBLK/BE/CH 351307-001 ASY,GRL,FRNT-E250P 1,0000

20 E250PBLK/BE/CH 351348-001 ASY,LOGO/LEDPLATE 1,0000

21 E250PBLK/BE/CH 49790P MICROFOAM,.062x20x18" 4,0000

22 E250PBLK/BE/CH 763-31110-40 SCR,#8X2.5,TR HD, PH 4,0000

23 E250PBLK/BE/CH 903401-012 SCR,PB,PPH,#6x.75,BLK 10,0000

24 E250PBLK/BE/CH 903802-016 SCR,PB,HXS,#8x1,ZINC 8,0000

25 E250PBLK/BE/CH 908302-012 SCR,PB,HXS,#6x.75,ZIN 4,0000

E250P

Electrical Parts List

Part Number Description Qty Reference designators

Resistors

020-220497-120

Film Resistor 2K2 1/4W J 1 R11

021-100401-120 MOF Resistor 1K 1W J 1 R103

021-120403-020 MOF Resistor 1K2 3WS J 1 R9

021-120405-020 MOF Resistor 1K2 5WS J 1 R6

022-500003-020 KNP Resistor 0 ohms05 3WS J 1 R104

024-000098-120 SMD Resistor 0 ohms 1/8W J 2 R125, 126

024-100298-120 SMD Resistor 10 ohms 1/8W J 2 R81, 82

024-100398-120 SMD Resistor 100 ohms 1/8W J 1 R62

024-100498-120 SMD Resistor 1K 1/8W J 10 R79, 83, 92, 95, 96, 105,

108, 127, 65

024-100598-120 SMD Resistor 10K 1/8W J 30 R2, 17, 19, 20, 21, 37, 54, 58,

63, 69, 71, 72, 74, 75, 84, 88,

89, 97, 106, 109, 111, 113-117,

119, 120, 123, 124

024-100698-120 SMD Resistor 100K 1/8W J 6 R3, 22-25, 112

024-110598-100 SMD Resistor 11K 1/8W F 1 R98

024-120698-120 SMD Resistor 120K 1/8W J 1 R39

024-121598-100 SMD Resistor 12K1 1/8W F 1 R38

024-137698-100 SMD Resistor 137K 1/8W F 1 R32

024-150498-120 SMD Resistor 1K5 1/8W J 2 R67, 68

024-180598-120 SMD Resistor 18K 1/8W J 1 R29

024-187698-100 SMD Resistor 187K 1/8W F 1 R45

024-200598-120 SMD Resistor 20K 1/8W J 1 R94

024-220398-120 SMD Resistor 220 ohms 1/8W J 1 R90

024-220498-121 SMD Resistor 2K2 1/8W J 3 R1, 87, 61

024-220598-120 SMD Resistor 22K 1/8W J 1 R118

024-220798-120 SMD Resistor 2M2 1/8W J 2 R80, 121

024-237598-120 SMD Resistor 23K7 1/8W F 1 R48

024-243698-100 SMD Resistor 243K 1/8W F 1 R36

024-270498-120 SMD Resistor 2K7 1/8W J 2 R73, 64

024-300398-120 SMD Resistor 300 ohms 1/8W J 1 R55

024-300598-120 SMD Resistor 30K 1/8W J 1 R56

024-330498-120 SMD Resistor 3K3 1/8W J 9 R7, 8, 26, 27, 12-15, 59

024-330598-120 SMD Resistor 33K 1/8W J 2 R4, 5

024-360498-120 SMD Resistor 3K6 1/8W J 1 R28

024-390498-120 SMD Resistor 3K9 1/8W J 1 R93

024-390598-120 SMD Resistor 39K 1/8W J 1 R77

024-430498-100 SMD Resistor 4K3 1/8W F 1 R78

024-453598-100 SMD Resistor 45K3 1/8W F 1 R30

024-470298-120 SMD Resistor 47 ohms 1/8W J 2 R101, 102

024-470398-120 SMD Resistor 470 ohms 1/8W J 3 R76, 99, 100

024-470498-120 SMD Resistor 4K7 1/8W J 2 R85, 86

024-470598-120 SMD Resistor 47K 1/8W J 4 R44, 47, 49, 107

024-470698-120 SMD Resistor 470K 1/8W J 1 R70

024-470798-120 SMD Resistor 4.7M 1/8W J 1 R60

024-487498-100 SMD Resistor 4K87 1/8W F 2 R51, 53

024-510398-120 SMD Resistor 510 ohms 1/8W J 1 R57

024-560598-120 SMD Resistor 56K 1/8W J 1 R122

024-620398-100 SMD Resistor 620 ohms 1/8W F 2 R16, 18

024-680498-120 SMD Resistor 6.8K 1/8W J 6 R46, 91, 40, 41, 43, 42

024-680598-120 SMD Resistor 68K 1/8W J 6 R33, 34, 31, 50, 52, 66

024-820598-120 SMD Resistor 82K 1/8W J 1 R69

026-200595-269 VR2 FREQUENCY POT PN:RD163121R034-20KBx2(EJ) 1 VR2

026-500495-252 VR1 LEVEL POT P/N:RK163111R522-5KA (EJ) 1 VR1

PB12

PB12 Electrical Parts List (Cont.)

Revision 2 Only

Part Number Description Qty Reference designators

Capacitors

031-100244-100

SMD Ceramic Capacitor 0u01/50V K 7 C33, 45, 51, 66, 67, 5, 10

031-100343-100 SMD Capacitor 100pF/50V J 3 C16, 36, 58

031-100344-100 SMD Capacitor 0u1/50V K 16 C11, 42-44, 46-49, 52, 54, 55,

60, 63, 71, 74, 77

031-100364-100 SMD Capacitor 0.1uF/100V K 2 C3, 7

031-220344-100 SMD Capacitor 220pF/50V J 5 C14, 15, 20, 21, 19

031-330444-300 SMD Capacitor 3300pF/50V K 2 C40, 34

031-470244-102 SMD Capacitor 0u047/50V K 2 C62, 59

031-560243-100 SMD Capacitor 56pF/50V J 2 C57, 61

031-560343-102 SMD Capacitor 560pF/50V J 1 C56

032-100484-200 END PE Capacitor 1uF/250V K 2 C70, C70B

033-200645-300 NP Capacitor 200u/50V M 2 C17, 18

033-470444-270 NPE 4u7/50V K 1 C73

033-680464-270 NPE 6u8/100V K 1 C72

034-100525-300 Electrolytic Capacitor 10uF/25V M 1 C35

034-100625-300 Electrolytic Capacitor 100uF/25V M 1 C64

034-220525-301 Electrolytic Capacitor 22uF/25V M 6 C4, 9, 41, 39, 50, 53

034-220615-301 Electrolytic Capacitor 220uF/16V M 1 C37

034-330525-300 Electrolytic Capacitor 33uF/25V M 1 C1

034-330615-300 Electrolytic Capacitor 330uF/16V M 2 C12, 78

034-330780-300 Electrolytic Capacitor 3300uF/80V M 2 C6, 8

034-470415-301 Electrolytic Capacitor 4u7/50V M 1 C2

034-470615-301 Electrolytic Capacitor 470uF/16V M 1 C65

038-100363-300 MPE Capacitor 0u1/100V J 7 C68, 69, 26, 27, 28, 29, 30

038-150393-300 MPE Capacitor 0u15/63V J 1 C25

038-330393-300 MPE Capacitor 0u33/63V J 1 C31

039-100390-100 UL Capacitor 0u1/275V 1 CXAC1

Semiconductors

051-000600-100

NPN Transistor MPSW06RLRA 2 Q2, Q16

051-005600-100 NPN Transistor MPSW56RLRA MPQ TO-92 1 Q3

051-222200-100 NPN Transistor PN:MPS2222ARLRA TO-92 1 Q21

051-290700-100 NPN Transistor P2N2907A TO-92 2 Q19, 23

051-540101-000 PNP Transistor 2N5401 TO-92 1 Q1

051-555100-000 NPN Transistor 2N5551 TO-92 1 Q17

052-400080-000 Bridge rectifier PN:RS804 400V, 8A 1 BR1

053-211100-000 IC;Half-Bridge Driver PN:IR2111 1 U7

054-000100-100 SMD Diode ES1D 200V, 1A, 35ns 5 D5, 26, 29, 33, 38

054-001001-100 SMD Zener Diode 10V SOT-23 DZ23C10 1 D35

054-001500-100 SMD Zener Diode 15V SOT-23 DZ23C15 3 D6, 7, 9

054-007200-100 SMD IC Dual Op-Amp TL072CDR SO-8 (TI) 2 U5, 6

054-007400-100 SMD IC Quad Op-Amp PN:TL074CDR (TI) 2 U2, 3

054-033904-100 SMD TR NPN (MOTOROLA) MMBT3904LT1 SOT23 6 Q11, 14, 13, 5, 8, 9

054-033906-100 SMD TR PNP (MOTOROLA) MMBT3906LT1 SOT23 4 Q6, 10, 12, 15

054-045580-100 SMD Dual Op-Amp NJM4558M-TE3 DMP-8 1 U4

054-050600-100 SMD Zener Diode 5.6V SOT-23 DZ23C5V6 3 D24, 36, 37

054-211400-100 SMD NPN Transistor DTC114EK SMT3 1 Q7

054-414803-100 SMD Zener Diode LL4148 26 D1-4, 8, 10-23, 27, 28, 30-32,

34, 39

054-540100-100 SMD PNP Transistor MMBT5401 LT1 3 Q20, 24, 26

054-555100-100 SMD NPN Transistor MMBT5551 LT1 1 Q25

051-003100-000 NPN Transistor TIP31C TO-220 1 Q4

051-064000-000 MOSFET IRF640 TO-220 2 Q18, 22

E250P

Electrical Parts List

Part Number Description Qty Reference designators

Miscellaneous

041-115001-000

Bead Coil YT-10911 1 L5

043-300101-000 Inductor 30uH YT-10033 1 L2

043-324300-000 Inductor 324uH YT-10778 1

043-560200-000 Inductor 56uH YT-10779 1

043-700101-000 Toroidal Inductor 70uH YT-10682 1 L3

044-100100-000 SMD Ferrite Bead 600R/100MHz 1206 2 FB1, FB2

072-010007-000 RCA Housing SCJ-1020 2P(G) WHT, RED 1 CONN1

072-040039-000 Terminal PC205 (t=0.8m/m) T205MA 1 S-

072-040064-000 Terminal PC250(t=0.8), T250MA 1 S+

072-040096-000 Terminal (t=0.8mm) PC187(0.8) 7 AC1, AC3, T1, T2, AC2,

SW2, SW4

072-040169-000 Connector 2 PIN JS-1001-2 P:2.5mm 1 CONN3A

072-060170-000 Binding Posts HI LEVEL Input/Output Jacks 4 BP/IP, BP/OP

XXX-XXXXX-XXX Fuse 250V, 5*20mm 1

073-050001-000 FUSE CLIP P/N:CFFH1206 2

074-030002-000 Toggle SW P/N L101 2 SW5, SW6

074-300018-000 Relay PN:943-1C-48D 1 K1

XXX-XXXXX-XXX Power Transformer 230V 1

061-020000-000 Level-Volume Knob 20 x 15 m/m UL 94V-0 Blk 2

061-314002-000 Strain relief SB4F-2 2

063-010012-000 Clamps for output transistorsTRK-1 4

063-531808-000 Rear plastic cover w/G ABS 1

073-032315-601 Heatsink 70 x 58 x 20 mm 1

074-020018-000 Main Power switch RF1003-BB4-0 1

XXX-XXXXX-XXX Power Cord 230V SPT-2 BLK 1

181-911600-161 Output wires #16 AWG UL1007 Blk 1

181-911655-135 Output wires #16 AWG UL1007 Green 1

181-921600-000 Output wires #16 AWG UL1015 Blk 1

181-921699-000 Output wires #16 AWG UL1015 Wht 1

E250P

Testing Procedure

A. Power Amp Section

Resistance

Check Resistance from S+ (SPK O/P) to GND should be >1M Ω(NO LOAD)

Resistance from V+ (C6 P+) to V- (C8 P-) gradually Fully CHARGED should read >10k Ω

Resistance from V+ (C6 P+) to S+ (SPK O/P) should read >1MΩ

Resistance from V- (C8 P-) to S+ (SPK O/P) should read >1M Ω

2. Power Up LED RED

With a 5mV signal to Low level input, LED should change to GREEN

-Voltage measurements (DVM)

LED

OP AMP

P-U4(1) P-U4(7)

RED 0Vrms 11.84VDC

GREEN 7.13Vrms -12.93VDC

3. D.C. Operation

-Voltage measurements (DVM) on CLASS D POWER AMP

Between V+ Q4(E) Q1(C) Q10(C) U7(1) U7(2) U7(4) U7(6) U7(7) U7(8)

And This

Point GND V- GND GND GND GND GND GND GND GND

Get this

Reading 71.7V 0V -71.7V 0V -71.7V -71.5V -71.2V 0V 0V 4.65V

4. Check Switching Frequency

• Oscilloscope - USE THE PROBE TIP TO U6(7) TO GND

• Reading 100kHz +/-10%,24Vp-p

B. Pre Amp Section

Line Level Input Sensitivity

-Set up Turn level, X’OVER FREQ POT Fully CW and LFE switch off

Generator Set at 200mV@50Hz

Signal to Line level input

E250P

Testing Procedure

- Voltage measurements

OP AMP SPEAKER

O/P

U2(1) U2(14) U2(8) U3(7) U3(1) U3(14) U3(8) U5(7) U5(1)

306.9mV 461mV 460mV 658mV 628mV 598mV 2.326V 2.02V 3.57V 23.33V

2. High Level Input Sensitivity

-Set up Turn level, X’OVER FREQ POT Fully CW and LFE switch off

Set Generator at 1.3V@50Hz

Signal to High level input

-Voltage measurements 15.3V at speaker output

3. Low-Pass

-Set up Set Generator at 200 mV@100Hz

Signal to Line level input

Measure voltage at S+ speaker output

-Voltage measurement

X’OVER FREQ. Setting Output

CW 14.03V

CCW 4.8V

4. LFE

-Set up Set Generator at 200mV@200Hz

Signal to Line level input

Measure voltage at S+ speaker output

LFE switch Setting Output

Normal 6V

LFE 18.32V

See flow chart next page for diagnostics.

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