Infinity 475a Service Manual Download Page 16

REFERENCE 475a Electrical Parts List  

Part Number

Qty Reference Designator

Main PCB

Resistors

0701-9101-02

Resistor

SMD 100

 1/2W ±5% 2512

2

R46 R16 

0701-3103-02

Resistor

SMD 10K

 1/4W ±5% 1206

1

R50

0702-4220-02

Resistor

 1W 22

 ±5% 

2

R20 R19

0702-4471-02

Resistor

 1W 470

 ±5% 

4

R76 R75 R77 R78

0701-2220-02

Resistor

SMD 22

 1/8W ±5% 0805

1

R43

0701-2470-03

Resistor

SMD 47

 1/8W ±1% 0805

24

R16D R16C R16B R16A R15D R15C R15B 
R15A R14D R14C R14B R14A R13D R13C 
R13B R13A R4D R4C R4B R4A R3D R3C R3B 

0701-2101-02

Resistor

SMD 100

 1/8W ±5% 0805

10

R64 R42 R41 R40 R39 R38 R12D R12C R12B 
R12A

0701-2221-03

Resistor

SMD 220

 1/8W ±1% 0805

2

R70 R17

0701-2102-03

Resistor

SMD 1K

 1/8W ±1% 0805

27

R120A R120 R119A R119 R44 R31 R30 R29 
R28 R17C R17B R17A R17D R2D R2C R2B 
R2A R1D R1C R1B R1A R15 R26 R112A R112 

0701-2821-02

Resistor

SMD 820

 1/8W ±5% 0805

8

R23D R23C R23B R23A R24D R24C R24B R24A

0701-2202-02

Resistor

SMD R0805 2K

 1/8W ±5% 

6

R2 R71 R138 R137 R136 R135

0701-2302-02

Resistor

SMD 3K

 1/8W ±5% 0805

1

R13

0701-2332-03

Resistor

SMD 3.3K

 1/8W ±1% 0805

5

R47 R18D R18C R18B R18A

0701-2432-03

Resistor

SMD 4.3K

 1/8W ±1% 0805

4

R19D R19A R19C R19B

0701-2472-02

Resistor

SMD 4.7K

 1/8W ±5% 0805

3

R36 R11 R37

0701-2682-03

Resistor

SMD 6.8K

 1/8W ±1% 0805

18

R5 R9D R9C R9B R9A R8D R8C R8B R8A 
R118A R118 R117 R117A R116A R116 R115A 
R115 R51

0701-2822-02

Resistor

SMD 8.2K

 1/8W ±5% 0805

1

R134

0701-2103-02

Resistor

SMD 10K

 1/8W ±5% 0805

52

R23 R133 R132 R131 R130 R113A R113 R110A 
R110 R109A R109 R108A R108 R107A R107 
R104A R104 R103A R103 R102A R102 R101A 
R101 R100A R100 R73 R54 R34 R22 R21 R11D 
R11C R11B R11A R10D R10C R10B R10A R7D 
R7C R7B R7A R6D R6C R6B R6A R5D R5C 
R5B R5A R1 R6

0701-2203-03

Resistor

SMD 20K

 1/8W ±1% 0805

5

R26D R26C R26B R26A R48

0701-2153-02

Resistor

SMD 15K

 1/8W ±5% 0805

1

R53

0701-2183-02

Resistor

SMD 18K

 1/8W ±5% 0805

3

R7 R9 R8

0701-2223-02

Resistor

SMD 22K

 1/8W ±5% 0805

2

R35 R18 

0701-2303-03

Resistor

SMD 30K 1/8W ±1% 0805

5

R128 R127 R124 R106 R10

0701-2334-02

Resistor

SMD 330K

 1/8W ±5% 0805

1

R3

0701-2333-02

Resistor

SMD 33K

 1/8W ±5% 0805

2

R45 R65

0701-2113-02

Resistor

SMD 11K

 1/8W ±5% 0805

1

R27

0701-2123-02

Resistor

SMD 12K

 1/8W ±5% 0805

1

R24

0701-2623-03

Resistor

SMD 62K

 1/8W ±1% 0805

4

R125 R114A R114 R106A

0701-2104-02

Resistor

SMD 100K

 1/8W ±5% 0805

12

R25 R111 R12 R4 R27D R27C R27B R27A R33 
R52 R55 R79

0701-3151-02

Resistor

SMD 150

 1/4W ±5% 1206

8

R21D R21C R21B R21A R20D R20C R20B R20A

0701-3472-02

Resistor

SMD 1/4W 4.7K

 ±5% 1206

3

R63 R62 R49

0701-54R7-02

Resistor

SMD 4.7

 1/2W ±5% 2512

6

R25D R25C R25B R25A R122 R121

0706-5101-02

Resistor

 5W 100

 ±5% 

2

R61 R60

0705-50R1-06

Resistor

 5W 0.1

*2 ±5% 26*5*18MM  

4

R22D R22C R22B R22A

1201-1021-03

Variable Resistor 1k

 

4

RW1D RW1C RW1B RW1A

0701-2752-02

Resistor

SMD 7.5K

 1/8W ±5% 0805

2

R14 R32

Description

 

475a 

Reference 

Series 

 

         

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

Summary of Contents for 475a

Page 1: ...Reference Series 475a 4 3 2 CHANNEL POWER AMPLIFIER SERVICE MANUAL Infinity Systems Inc 250 Crossways Park Dr Woodbury New York 11797 Rev0 8 2007 Released 2007 Discontinued XXXX...

Page 2: ...s 1 THD N Signal to noise ratio 85dBA reference 1W into 4 ohms Dynamic power 117W channels 2 ohms Effective damping factor 6 3 4 ohms Frequency response 10Hz 100kHz 3dB Maximum input signal 6 0V Maxim...

Page 3: ...s b full rated power dB 90 dBA 1 watt into 4 ohms 1V signal input Input Sensitivity Low Level Input v full rated power 100mV 6V Volts 20 Frequency response Unit 3dB 10Hz 100kHz Hz 3dB High Pass Crosso...

Page 4: ...Carton 1 2 REF475a REF475a Amplifier 1 3 Plastic Bag 1 4 BZL279112001 Packing Foam 1 5 Visit Infinitysystems com Owner s manual 1 6 Plastic Bag 1 7 Accessory kit consisting of 1 LS1CJ0402507 Mounting...

Page 5: ...p To Head Unit Rear Output Rear Speakers Front Speakers The 475a can be set up for stereo 4 channel 3 channel or bridged 2 channel operation as shown in Figures 5 through 8 NOTE Minimum speaker impeda...

Page 6: ...d in tri mode to a subwoofer and a pair of satellite speakers Note crossover and channel assignment settings Figure 8 475a connected in bridge mode to a pair of full range speakers Note crossover and...

Page 7: ...dway While listening to music adjust the crossover for the least perceived distortion from the speakers allowing them to reproduce as much bass as possible Low Pass Filters For subwoofers choose the h...

Page 8: ...5KJ0301007 Screw for terminal RCA jacks 6 9 XN 10500 012 Knob 6 10 LSIAP0300607 Screw 6 11 LSIAM0300607 Screw 2 12 XG 0017 2601 Bottom plate 1 13 LSIAY0301201 Screw 2 14 PL L0007 000 Transistor spring...

Page 9: ...Hz AMP AMP INPUT RL INPUT RR OP OP 1 2 3 4 IMS INPUT 2 3 1 4 A MODE FRONT REAR SUB 2 3 1 4 A MODE FRONT REAR SUB 2 3 1 4 A 2 3 1 4 A MODE RIGHT STEREO LEFT MODE RIGHT STEREO LEFT 1 3 2 A 1 3 2 A OP OP...

Page 10: ...475a Reference Series 9...

Page 11: ...475a Reference Series 10...

Page 12: ...475a Reference Series 11...

Page 13: ...475a Reference Series 12...

Page 14: ...475a Reference Series 13...

Page 15: ...475a Reference Series 14...

Page 16: ...R116 R115A R115 R51 0701 2822 02 Resistor SMD 8 2K 1 8W 5 0805 1 R134 0701 2103 02 Resistor SMD 10K 1 8W 5 0805 52 R23 R133 R132 R131 R130 R113A R113 R110A R110 R109A R109 R108A R108 R107A R107 R104A...

Page 17: ...105 50V 5 2 C10 C28 06D212274002 CAP Electro 220UF 25V 20 1 C30 06D211086100 CAP Electro 1000UF 50V 12 5 25MM 105 20 6 C32 C31 C55 C38 C34 C33 06D211073116 CAP Electro 100UF 16V 20 5 11 105 1 C18 06D...

Page 18: ...RFZ48N TO 220 6 Q21 Q20 Q16 Q15 Q14 Q13 03P1 B647 01 Transistor 2SB647 1A 120V 0 9W PNP TO 92 4 Q4C Q4B Q4A Q4D 03N1 35CW 26 Transistor TIP35CW NPN T0 247 4 Q6D Q6C Q6B Q6A 03P1 36CW 26 Transistor TIP...

Page 19: ...006000 Ceramic Capacitor SMD 10pF 50V 0805 NPO 5 5 C315 C314 C230 C215 C214 06S322206000 Ceramic Capacitor SMD 22pF 50V 0805 NPO 5 3 C210 C224 C223 06S321016000 Ceramic Capacitor SMD 100pF 50V 0805 NP...

Page 20: ...0301007 Screw 3 10MM Plating Nickel 6 LS5KP0300807 Screw 3 8MM Plating Nickel 8 LS1AP0300607 Screw 3 6MM Plating Nickel 6 LS1AM0300607 Screw PM3 6 Plating Nickel 2 KT 200012200 CAP White PVC for RCA 3...

Page 21: ...475a Reference Series 20...

Page 22: ...5W C10A CL224 R12A 100R R7A 10K C6A 471 MUTE CH1SG R26A 20K C1A W22U 50V R6A 10K CH1OUT R5A 10K PRO VCC VCC CH1OUT MUTE CH1SG R20A 150R 1 4W R11A 10K Q8A S8050 VCC VCC 2 3 1 R22A 0 10 5W C4A 391 100V...

Page 23: ...5W C10B CL224 R12B 100R R7B 10K C6B 471 MUTE CH2SG R26B 20K C1B W22U 50V R6B 10K CH2OUT R5B 10K PRO VCC VCC CH2OUT MUTE CH2SG R20B 150R 1 4W R11B 10K Q8B S8050 VCC VCC 2 3 1 R22B 0 10 5W C4B 391 100V...

Page 24: ...5W C10C CL224 R12C 100R R7C 10K C6C 471 MUTE CH3SG R26C 20K C1C W22U 50V R6C 10K CH3OUT R5C 10K PRO VCC VCC CH3OUT MUTE CH3SG R20C 150R 1 4W R11C 10K Q8C S8050 VCC VCC 2 3 1 R22C 0 10 5W C4C 391 100V...

Page 25: ...5W C10D CL224 R12D 100R R7D 10K C6D 471 MUTE CH4SG R26D 20K C1D W22U 50V R6D 10K CH4OUT R5D 10K PRO VCC VCC CH4OUT MUTE CH4SG R20D 150R 1 4W R11D 10K Q8D S8050 VCC VCC 2 3 1 R22D 0 10 5W C4D 391 100V...

Page 26: ...4558 7 9 8 VR100AC A50K 10 12 11 VR100AD A50K LPF FLAT HPF 15VA 15VA C109A CC22P CH4 R114A 62K R113A 10K 15VA 15VA CH2SG CH1SG CH3SG CH4SG C110 CC104 C111 CC104 C112 CC104 C113 CC104 C110A CC104 C111...

Page 27: ...45FR RJ45FL RJ45GND RJ45GND RJ45GND RJ45REM DIAGNOSTIC RJ45SUB RJ45GND SUB RJ45SUBOUT RJ45SUBOUT R307 10K R301 22K C316 NP220U 25V C318 CC101 R308 10K R300 10K INPUT C300 W22U 50V C314 CC10P C319 CC10...

Page 28: ...CHECKED BY APPROVED BY DATA DATA DATA POWER infinity REF 475 Q20 IRF48N Q21 IRF48N R64 100 R42 100 R6 10K C8 CC104 Q12 C1815 R21 10K Q11 C1815 R35 22K C15 47U 16V R22 10K R34 10K Q17 C1815 Q18 A1015...

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