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Service Manual
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Northridge E250P/230
Service Manual
Amplifier
Power (RMS): Driver: Inputs: 250 Watts 300mm (12") PolyPlas Line Level (switchable to LFE) and Speaker Level with 5-way binding posts Speaker Level, High-Pass 5-way binding posts
Outputs:
Low-Pass
Frequency: Continuously variable from 50Hz 150Hz
High-Pass
Frequency: 150Hz when using speaker-level output
Frequency
Response: 25Hz low-pass crossover setting
Dimensions
(H x W x D): Weight: 500mm x 365mm x 435mm 20.1kg
14,15,16 2,3
7 11 1
24
17
19 9 23 6,20 21 12 10 18 8,13 1
4 5
Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Model E250PBLK/BE/CH E250P/230 E250PBE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250P/230 E250PBE/230 E250PCH/230 E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH E250PBLK/BE/CH Part number 315953-001 333249-001 333249-003 336486-001 336799-001 338125-002 338128-002 338381-001 338836-001 350161-001 351243-001 351245-002 351248-001 351249-004 351249-005 351249-006 351252-001 351252-002 351307-001 351348-001 49790P 763-31110-40 903401-012 903802-016 908302-012 Description BAG,ZIPLOCK,9X12 CUP,GRL-HLS CUP,GRL-INTRMZO
Qty 1,0000 4,0000 4,0000 4,0000 1,0000 1,0000 1,0000 1,0000 2,0000 1,0000 1,0000 1,0000 1,0000 1,0000 1,0000 1,0000 1,0000 1,0000 1,0000 1,0000 4,0000 4,0000 10,0000 8,0000 4,0000
FT,MOLDED,W/RBR INSRT ASY,PTB-STUDIO PB12 ASY,LED-E150P/E250P ASY,XDUCER,WFR,12", E WARR,JBL,1YR/5YR,NEW LBL, COUNTRY OF ORIGI LBL,JBL"Assem. in Mex RING,TRIM,12"-E250P ASY,AMP-E250P/230V MNL,OWNER-E150P/E250P CTN,OUTER,MSTR-E250P/ CTN,OUTER,MSTR-E250BE CTN,OUTER,MSTR-E250CH PAD,END,TOP-E250P SER PAD,END,BTM-E250P SER ASY,GRL,FRNT-E250P ASY,LOGO/LEDPLATE MICROFOAM,.062x20x18" SCR,#8X2.5,TR HD, PH SCR,PB,PPH,#6x.75,BLK SCR,PB,HXS,#8x1,ZINC SCR,PB,HXS,#6x.75,ZIN
____Destination____
_________________________Description____________________________ Fuse Label Label Label Gasket Gasket Gasket Gasket Gasket Double-sided PCB;FR-4 Carbon film MOF Resistor MOF Resistor MOF Resistor MOF Resistor Resistor KNP SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor 21x5mm 97x74.8 t=0.254mm 200.3x71.1 t=0.254mm 12x15 t=5mm CR PN:L-32 200x20mm t=5mm PORON 200x20mm t=2mm CR4305 321x8 t=1mm CR 93x4 t=1mm CR 199x124x1.6mm (PB-10/12) REV:E 2K2 1/4W J TAPING 1K 1W J 1K2 3WS J 8x20 1K2 5WS J 8x25 22R 2W(S) J MB TYPE 15x8 0R05 3WS J FK TYPE 0R 1/8W J 0805 TAPING 10R 1/8W J 0805 TAPING 100R 1/8W J 0805 TAPING 1K 1/8W J 0805 TAPING 10K 1/8W F 0805 TAPING 10K 1/8W J 0805 TAPING 100K 1/8W F 0805 TAPING 100K 1/8W J 0805 TAPING 11K 1/8W F 0805 TAPING 120K 1/8W J 0805 TAPING Harman consumer International
___Part No.___ 008-000200-160 008-001008-162 008-002071-000 008-061215-000 008-062002-002 008-062002-012 008-063208-000 008-069304-000 015-201200-003 020-220497-120 021-100401-120 021-120403-020 021-120405-020 021-220202-120 022-500003-020 024-000098-120 024-100298-120 024-100398-120 024-100498-120 024-100598-100 024-100598-120 024-100698-100 024-100698-120 024-110598-100 024-120698-120
.
R11 R103 R9 R6 R10 R104 R125,126 R81,82 R62 R79,83,92,95,96, 105,108,127,65 R20,21 R2,17,19,37,54, 58,63,71, R22-25 R3,112 R98 R39 230V Version
Northridge E 250P
____Destination____ R38 R32 R67,68 R29 R45 R94 R90 R1,87,61 R118 R80,121 R48 R36 R73,64 R55 R56 R7,8,12-15,59 R4,5 R26,27 R28 R93 R77 R78 R30 R101,102 R76,99,100 R85,86 R44,47,49,107 230V Version
_________________________Description____________________________ SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor 12K1 1/8W F 0805 TAPING 137K 1/8W F 0805 TAPING 1K5 1/8W J 0805 TAPING 18K 1/8W J 0805 TAPING 187K 1/8W F 0805 TAPING 20K 1/8W J 0805 TAPING 220R 1/8W J 0805 TAPING 2K2 1/8W J 0805 TAPING 22K 1/8W J 0805 TAPING 2M2 1/8W J 0805 TAPING 23K7 1/8W F 0805 TAPING 243K 1/8W F 0805 TAPING 2K7 1/8W J 0805 TAPING 300R 1/8W J 0805 TAPING 30K 1/8W J 0805 TAPING 3K3 1/8W J 0805 TAPING 33K 1/8W J 0805 TAPING 3K32 1/8W F 0805 TAPING 3K6 1/8W J 0805 TAPING 3K9 1/8W J 0805 TAPING 39K 1/8W J 0805 TAPING 4K3 1/8W F 0805 TAPING 45K3 1/8W F 0805 TAPING 47R 1/8W J 0805 TAPING 470R 1/8W J 0805 TAPING 4K7 1/8W J 0805 TAPING 47K 1/8W J 0805 TAPING Harman consumer International
___Part No.___ 024-121598-100 024-137698-100 024-150498-120 024-180598-120 024-187698-100 024-200598-120 024-220398-120 024-220498-121 024-220598-120 024-220798-120 024-237598-120 024-243698-100 024-270498-120 024-300398-120 024-300598-120 024-330498-120 024-330598-120 024-332498-100 024-360498-120 024-390498-120 024-390598-120 024-430498-100 024-453598-100 024-470298-120 024-470398-120 024-470498-120 024-470598-120
.
Northridge E 250P
____Destination____ R70 R60 R51,53 R57 R122 R16,18 R46,91,40,41,43,42 R33,34,31,50,52,66 R69 TH1 VR2 VR1 C33,45,51,66,67,5,10 C16,36,58 C11,42-44,46-49,52 54,55,60,63,71,74,77 C3,7 C14,15,20,21,19 C40,34 C62,59 C57,61 C56 C70,C70B C17,18 C73 C72 C35 230V Version
_________________________Description____________________________ SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor SMD Resistor Thermister VR VR 5KA SMD Ceramic Capacitor SMD Capacitor SMD Capacitor SMD Capacitor SMD Capacitor SMD Capacitor SMD Capacitor SMD Capacitor SMD Capacitor END Mylar Capacitor NP Capacitor NPE Capacitor NPE Capacitor Electrolytic Capacitor 470K 1/8W J 0805 TAPING 4M7 1/8W J 0805 TAPING 4K87 1/8W F 0805 TAPING 510R 1/8W J 0805 TAPING 56K 1/8W J 0805 TAPING 620R 1/8W F 0805 TAPING 6K8 1/8W J 0805 TAPING 68K 1/8W J 0805 TAPING 82K 1/8W J 0805 TAPING TSE-103 K L:50mm PN:RD163121R03D-20KBx2(EJ) PN:RK163111R52B-5KA (EJ) 0u01/50V K 0805 X7R TAPING 100pF/50V J 0805 NPO TAPING 0u1/50V K 0805 X7R TAPING 0u1/250V K 1206 X7R TAPING 220pF/50V J 0805 NPO TAPING 3300pF/50V K 0805 X7R TAPING 0u047/50V K 0805 X7R TAPING 56pF/50V J 0805 NPO TAPING 560pF/50V J 0805 NPO TAPING 1uF/250V K P:15 200u/50V M (R)1321 P:5 4u7/50V K10 (R)8x13 SBE 6u8/100V K10 (R)1020 GNE 10uF/25V M (R)0511 P:5 TAPING
___Part No.___ 024-470698-120 024-470798-120 024-487498-100 024-510398-120 024-560598-120 024-620398-100 024-680498-120 024-680598-120 024-820598-120 025-010300-000 026-200595-269 026-500495-252 031-100244-100 031-100343-100 031-100344-100 031-100384-100R 031-220344-100 031-330444-300 031-470244-102 031-560243-100 031-560343-102 032-100484-200 033-200645-300 033-470444-270 033-680464-270 034-100525-300
.
Harman consumer International
Northridge E 250P
____Destination____ C64 C4,9,41,39,50,53 C37 C1 C12,78 C6,8 C2 C65 C68,69,26,27,28,29,30 C25 C31 CXAC1 L5 L2
_________________________Description____________________________ Electrolytic Capacitor Electrolytic Capacitor Electrolytic Capacitor Electrolytic Capacitor Electrolytic Capacitor Electrolytic Capacitor Electrolytic Capacitor Electrolytic Capacitor MPE Capacitor MPE Capacitor MPE Capacitor Safety Capacitor Bead Coil Power X'fmr Inductor Inductor Inductor SMD FERRITE BEAD Transistor NPN Transistor Transistor PNP Transistor NPN Transistor PNP Transistor PNP Transistor NPN MOSFET N-Channel Bridge Regulator 100uF/25V M (R)6.3x11 P:5 22uF/25V M (R)5x11 P:5 TAPING 220uF/16V M (R)0611 P:5 33uF/25V M (R)0511 P:5 330uF/16V M (R)0812 P:5 TAPING 3300uF/80V M (R)22x48 4u7/50V M (R)0511 P:5 TAPING 470uF/16V M (R)0812 P:5 TAPING 0u1/100V J TAPING 0u15/63V J TAPING 0u33/63V J TAPING PN:HQX0.1K275VACx2 18x6x12mm YT-10911 YT-10913 150W/5.6(230V/50Hz) 30uH YT-10033 324uH YT-10778 56uH YT-10779 PN:321611 600R/100MHz 1206 PN:MPSW06RLRA TO-92 TAPING(ON) PN:TIP 31C TO-220 (MOSPEC) PN:MPSW56RLRA TO-92 TAPING(ON) PN:MPS2222ARLRA TO-92 TAPING PN:MPS2907A RLRA TO-92 TAPING PN:2N5401 TO-92 TAPING PN:2N5551 TO-92 TAPING PN:IRF640N TO-220 (IR) PN:RS804 400V,8A
___Part No.___ 034-100625-300 034-220525-301 034-220615-301 034-330525-300 034-330615-300 034-330780-300 034-470415-301 034-470615-301 038-100363-300 038-150393-300 038-330393-300 039-100384-100 041-115001-000 042-018600-000 043-300101-000 043-324300-000 043-560200-000 044-100100-000 051-000600-100 051-003100-000 051-005600-100 051-222200-100 051-290700-100 051-540101-000 051-555100-000 051-640001-000 052-400080-000
.
FB1,FB2 Q2,Q16 Q4 Q3 Q21 Q19,23 Q1 Q17 Q18,22 BR1 230V Version
Harman consumer International
Northridge E 250P
____Destination____ U7 D5,26,29,33,38 D35 D6,7,9 U5,6 U2,3 Q7 Q11,14,13,5,8,9 Q6,10,12,15 U4 D24,36,37 D1-4,8,10-23,27, 28,30-32,34,39 Q20,24,26 Q25
_________________________Description____________________________ IC;DIP,DRIVER SMD DIODE SMD ZENER DIODE SMD ZENER DIODE SMD IC SMD IC;(OP) SMD Transistor SMD Transistor SMD Transistor SMD IC;(OP) SMD ZENER DIODE SMD DIODE SMD Transistor (PNP) SMD Transistor (NPN) Knob ABS Strain Relief Rubber Foot Myca Bracket for Power Transistor Plate Bucket CABLE TIE Fiber Washer Washer RCA Jack Terminal PN:IR2111 8PIN (IR) PN:ES1D 200V 1A TAPING PN:BZX84C10 10V SOT-23 TAPING PN:BZX84C15 15V SOT-23 TAPING PN:TL072CDR SO-8 TAPING (TI) PN:TL074CDR TAPING (TI) PN:DTC114TKA SMT3 TAPING (ROHM PN:MMBT3904LT1 SOT23 TAPING(ON PN:MMBT3906LT1 SOT23 TAPING(ON PN:NJM4558M-TE3 DMP-8 TAPING PN:BZX84C5V6 5.6V SOT-23 TAPIN PN:LL4148 TAPING (Wishay) PN:MMBT5401 LT1 SOT-23 TAPING PN:MMBT5551 LT1 TAPING (ON) 20x15m/m UL94V-0 BLK P/N SB4F-2 ID:6.2 OD:11.5 t=2mm 13x18mm TO-220 P/N:TRK-1 322x105.7x15mm BLK (94V0)ABS 322x105.7x146.5mm BLK (94VO) CV-120S OD=8mm ID=3.2 t=1 ID=5.1 OD=12 t=1m/m SCJ-1020 2P(G) WHT,RED PC205 (t=0.8m/m) T205MA
___Part No.___ 053-211100-000 054-000100-100 054-001002-100 054-001501-100 054-007200-100 054-007400-100 054-011400-100 054-033904-100 054-033906-100 054-045580-100 054-050601-100 054-414803-100 054-540100-100 054-555100-100 061-020000-000 061-314002-000 061-400014-000 061-700044-000 063-010012-000 063-321100-001 063-531808-000 066-120300-900 071-100608-100 071-100851-000 072-010007-000 072-040039-000
.
S230V Version
Harman consumer International
Northridge E 250P
____Destination____ S+ AC1,AC3,T1,T2, SW2,SW4,AC2
_________________________Description____________________________ Terminal Terminal Connector B.P. BP Plug BP Plug Black Anodized Fuse Clip ROCKER SW (POWER) Toggle Switch Relay Tinned Plated Copper Wire Wire Set #22 UL1007 VDE Power Cable LF2-75 FUSE:VBS UTE Wire #16AWG UL1007 Wire #16AWG UL1007 Wire BLK #18 UL1617 Wire Wht #18 UL1617 PC250(t=0.8),T250MA
___Part No.___ 072-040064-000
.
SW5,SW6 K1
(t=0.8mm) PC187(0.8) 072-040096-000 2 PIN JS-1001-2 P:2.5mm 072-040169-000 W / Accessory Parts 072-060170-000 072-060213-000 PN:A414B-3A RCA JAM BLK PN:A414R-3A RCA JAM RED 072-060214-000 70x58x20mm 073-032315-601 P/N:CFFH1206 073-050001-000 PN:RF1003-BB4-0 074-020018-000 PN:L101-T2B4QE 074-030002-000 PN:943-1C-48D 074-300018-000 0.6x63m/m TAPING 080-060351-009 L=410mm 082-022241-001 6 Feet 2PIN Black T187F 086-021818-030 FUSE:1.25A,250V,5*20mm 093-205201-320 Black, L=610mm Transparent Sleeve both ends 181-911600-161 Green L=610mm Transparent Sleeve both ends 181-911655-135 T187 L:140mm Transparent Sleeve both ends 181-981800-104 T187 L:160mm Transparent Sleeve both ends 181-981899-101
230V Version
Harman consumer International
Northridge E 250P
E250P
Testing Procedure
A. Power Amp Section Resistance Check
Resistance from S+ (SPK O/P) to GND should be >1M (NO LOAD) Resistance from V+ (C6 P+) to V- (C8 P-) gradually Fully CHARGED should read >10k Resistance from V+ (C6 P+) to S+ (SPK O/P) should read >1M Resistance from V- (C8 P-) to S+ (SPK O/P) should read >1M
2. Power Up LED RED With a 5mV signal to Low level input, LED should change to GREEN -Voltage measurements (DVM) OP AMP P-U4(1) P-U4(7) 0Vrms 11.84VDC 7.13Vrms -12.93VDC
LED RED GREEN 3. D.C. Operation
-Voltage measurements (DVM) on CLASS D POWER AMP
Between And This Point Get this Reading V+ GND 71.7V Q4(E) V0V Q1(C) GND -71.7V
Q10(C)
U7(1) GND -71.7V
U7(2) GND -71.5V
U7(4) GND -71.2V
U7(6) GND 0V
U7(7) GND 0V
U7(8) GND 4.65V
GND 0V
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 U3(1)
628mV
U2(1)
306.9mV
U2(14)
461mV
U2(8)
460mV
U3(7)
658mV
U3(14)
598mV
U3(8)
2.326V
U5(7)
2.02V
U5(1)
3.57V
SPEAKER O/P
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 CW CCW 4. LFE -Set up Set Generator at 200mV@200Hz Signal to Line level input Measure voltage at S+ speaker output Output 6V 18.32V Output 14.03V 4.8V
LFE switch Setting Normal LFE
See flow chart next page for diagnostics.
E250P
Testing Procedure
POWER MODULE TESTING FLOW CHART
CAUTION : SPEAKER OUTPUT IS FLOATING AND IS NOT PROTECTED AGAINST A SHORT TO GROUND. ALL TEST INSTRUMENTS CONNECTED TO THE OUTPUT MUST BE FLOATING. ATTACH THE SCOPE PROBE TIP TO S - and REFERENCE LEAD TO S+.
(A 10mV signal may need from the input to trigger the Switch turn on) START
Resistance check (no load) between V+ V-, V+ O/P,V- O/P and O/P to GND is > 10K
Check +/-15V-MOD +/-15V voltage at U 6(8),U6(4) Check FB1,FB2,C45, C50,C60,C63, R81,R82
no no
OK
Replace Q18,Q22
OK
yes yes
Power up with no signal input LED RED I/P:10mv/50HZ Check +15V/SW Q4(E) TO V15V
no no
OK
yes
Check Q4(E) TO V= 0V D.C.
Discharge C37, Check fuse transformer, L4, rectifier, C6 and C8
Check
OK MUTE(-12.9V),
yes Check U7(1) = -58.3V
And Q24,Q25,Q26
no no
OK
Check MUTE(+8V) and Q24,Q25,Q26
OK
yes Use scope to check O/P U7(6) and GND 143Vp-p square wave shown
Check U7,Q16,Q17, Q20,Q21,R87, D26,D35,C64
yes Use scope to check switching frequency U6(7) 100KHz +/-10% , ~24Vp-p
no
OK
no
OK
yes yes Check L2,L3,C71,C72, C73,C74
CLASS D AMP OK END
Block Diagram
1 2 3 4 5
RevNo Revision note
6
7
Date
8
Signature Checked
A
SPEAKER LEVEL INPUT PHASE CTRL SWITCH
A
Rin
VOLUME CTRL
Lin
DIF. AMP
SUMMI NG AMP
AMP STAGE HPF LPF 12dB/Octave LPF Variable 12dB/Octave
B
Rout Lout Line Level Input
DC OFFSET PROTECTION
12dB/Octave
B
LFE LIMITER / LPF SUMMI NG AMP
NORMAL
C
SIGNAL SENSE THERMAL PROTECTION MUTE
C
SIGNAL SENEING
ATO
CURRENT PROTECTION
MUTE
D
* FUSE
LINEAR POWER SUPPLY CLASS D AMPLIFIER OUTPUT-RELAY
D
5.6 OHMS EXTERNAL LED INDICATORS +15V SW CONTROLLED REGULATOR
E
E
MUTE
F
NOTE : 120 VAC T2A-250V 230 VAC T1.25A-250V
F
1
2
3
6
7
8
E250P
Integrated Circuit Diagrams
2N5401 Q1
3 Collector 2 Base
1. G 2. D 3. S
OPAMP, QUAD TL074CDR U2, 3
MOSFET IRF640 Q18, 22
1
1 Emitter
2
3
MPSW06RLRA, MPSW56RLRAMPQ, MPS2222ARLRA, 2N2907A, 2N5551, Q2, 16, 3, 21, 19, 23, 17
3 Collector 2 Base
1
2
3
OPAMP, DUAL TL072CDR SO-8, NJM4558M-TE3 U5, 6, 4
TIP31C Q4
1
1 Emitter
2 3
BEVEL
MMBT3904LTI SOT23, MMBT3906LTI SOT23, DTC114EK SMT3, MMBT5401 LTI, MMBT5551 LTI Q11, 14, 13, 5, 8, 9, 6, 10, 12, 15, 7, 20, 24, 26, 25
B
C
E
IR2111 HALF-BRIDGE DRIVER U7