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GM-D505/XH/EW

7.3 CIRCUIT DESCRIPTIONS

The principle of class-D amplifier.

A class-D amplifier uses (Pulse Wide Modulation) PWM . This means that the original signal Vin(sine-waved signal) at

the input is modulated with another signal Vm which has a much higher fixed frequency. The waveform which is used

as carrier wave or modulation signal is normally a triangle-shaped signal.

Vin: input signal (sine-waved signal)

Vm: modulated signal (triangle-shaped signal)

Vd: output signal (pulse width modulated signal)

The Vd signal has a fundamental frequency equal to that of the modulation frequency Fm (the frequency of the modu-

lation signal Vm) but will also contain the input signal and a band of frequency components around the modulation

frequency.

The original signal Fvin is selected with a low pass filter, cutting the high frequencies around the modulation frequen-

cy Fm.

Fvin: original signal

Fc: cut off frequency

Fm: modulation frequency

Circuit Description

IC401 (TDA7570) is class D Chip with internal Analog to Digital Converter. (See an IC information block)

IC401 (TDA7570) digitizes the analog waveform and uses PWM at 310kHz Rail to Rail Square wave to generate an

audio signal that is then recovered by the 4th order LC filter.

Содержание GM-D505

Страница 1: ... NV Haven 1087 Keetberglaan 1 9120 Melsele Belgium PIONEER ELECTRONICS ASIACENTRE PTE LTD 253 Alexandra Road 04 01 Singapore 159936 C PIONEER CORPORATION 2003 K ZZB MAY 2003 Printed in Japan ORDER NO CRT3076 5 CHANNEL POWER AMPLIFIER GM D505XH EW XR EW Service Manual GM D505 XH EW GM D505XH ES XR ES For details refer to Important symbols for good services ...

Страница 2: ... to proper portions by the appropriate amount For replacement parts or tools the prescribed ones should be used 4 Shipping mode and shipping screws To protect the product from damages or failures that may be caused during transit the shipping mode should be set or the shipping screws should be installed before shipping out in accordance with this manual if necessary 1 Product safety You should con...

Страница 3: ...nel A B 100 W 4 4 Ω Channel SUB 300 W 1 4 Ω 600 W 1 2 Ω Continuous power output 65 W 4 4 Ω 225 W 1 4 Ω 56 W 4 4 Ω 350 W 1 2 Ω DIN45324 B 14 4 V Load impedance 4 Ω Channel A B 4 8 Ω allowable Channel SUB 2 8 Ω allowable Frequency response Channel A B 10 40 000 Hz 0 dB 1 dB Channel SUB 5 240 Hz 0 5 dB 3 dB Signal to noise ratio 95 dB IEC A network Distortion Channel A B 0 01 10 W 1 kHz Channel SUB 0...

Страница 4: ...4 1 2 3 4 1 2 3 4 F E D C B A GM D505 XH EW 2 EXPLODED VIEWS AND PARTS LIST 2 1 PACKING ...

Страница 5: ...RD0233 8 3 Warranty Card HRY1157 Not used 9 Core HTX0003 HTX0003 10 Polyethylene Bag HEG0025 HEG0025 11 Lock Tie HNV0025 HNV0025 PACKING SECTION PARTS LIST NOTE Parts marked by are generally unavailable because they are not in our Master Spare Parts List Screws adjacent to mark on the product are used for disassembly For the applying amount of lubricants or glue follow the instructions in this man...

Страница 6: ...6 1 2 3 4 1 2 3 4 F E D C B A GM D505 XH EW 2 2 EXTERIOR A B C ...

Страница 7: ...r CN103 HKS0005 30 Clip HNC0054 31 Holder HNC0143 32 Holder HNC0144 33 Spacer HNM0006 34 Insulator HNM0125 35 Insulator HNM0126 36 Bar HNR0124 37 Heat Sink HNR0201 38 Heat Sink HNR0202 39 Heat Sink HNR0203 40 Screw PPZ30P120FZK 41 Screw VBZ30P110FZK 42 Network Unit HWG0030 43 Connector CN102 HKS0004 44 Clip HNC0054 45 Screw PBB30P140FMC 46 Screw PPZ30P120FZK 47 Light Pipe Unit HXA0383 48 IC IC501 ...

Страница 8: ...rvice parts be sure to refer to EXPLODED VIEWS AND PARTS LIST or ELECTRICAL PARTS LIST A a A B B HPF SWITCH A HPF SWITCH BFC SWITCH 100K B 10K A 10K A 20K E B NETWORK PCB 1 2 B NETWORK PCB 2 2 A Freq A Freq A Gain A Gain B Freq B Freq B Freq B Freq B Gain B Gain Sub Freq Sub Freq Sub Gain Sub Gain 1 1 2 8 1 2 3 4 1 2 3 4 F E D C B A GM D505 XH EW ...

Страница 9: ...dicates the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation Symbol indicates a resistor No differentiation is made between chip resistors and discrete resistors NOTE Symbol indicates a capacitor No differentiation is made between chip capacitors and discrete capacitors NETWORK UNIT Consists of NETWORK PCB CONNECTOR PCB HEK0025 HEK0...

Страница 10: ... F E D C B A GM D505 XH EW A a A b A a A a A b B 1 2 B HPF SWITCH A HPF SWITCH 10K B 10K B B NETWORK PCB 1 2 A Freq A Freq A Gain A Gain B Freq B Freq B Freq B Freq B Gain B Gain Sub Freq Sub Freq Sub Gain Sub Gain 20K E ...

Страница 11: ...11 5 6 7 8 F E D C B A 5 6 7 8 GM D505 XH EW A a A b A a A a A b C B 3 4 5 6 BFC SWITCH 100K B B NETWORK PCB 2 2 Sub Freq Sub Gain 1 1 2 ...

Страница 12: ...12 1 2 3 4 1 2 3 4 F E D C B A GM D505 XH EW A a A b A b 1 2 A AMP UNIT 2 2 3 ...

Страница 13: ...ts indicates the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation Symbol indicates a resistor No differentiation is made between chip resistors and discrete resistors NOTE Symbol indicates a capacitor No differentiation is made between chip capacitors and discrete capacitors NETWORK UNIT Consists of NETWORK PCB CONNECTOR PCB HEK0025...

Страница 14: ...m measured at TP638 and TP639 Waveforms Note The encircled numbers denote measuring pointes in the circuit diagram 2 BRem TP624 Stand by line TP253 Mute line TP254 timing diagram 3 Class D switching audio waveform at no signal TP413 and or TP414 same waveform on both test points ...

Страница 15: ...15 5 6 7 8 F E D C B A 5 6 7 8 GM D505 XH EW ...

Страница 16: ...parts mounted on this PCB include all necessary parts for several destination For further information for respective destinations be sure to check with the schematic dia gram 2 Viewpoint of PCB diagrams BFC B CN102 16 1 2 3 4 1 2 3 4 F E D C B A GM D505 XH EW 4 PCB CONNECTION DIAGRAM 4 1 AMP UNIT ...

Страница 17: ...17 5 6 7 8 F E D C B A 5 6 7 8 GM D505 XH EW A SIDE A AR AR AL AL BR BR BL BL SR SL C CN702 C CN701 C CN703 ...

Страница 18: ...18 1 2 3 4 1 2 3 4 F E D C B A GM D505 XH EW A A AMP UNIT AR AR AL AL BR BR BL BL SR TP638 TP639 TP624 ...

Страница 19: ...19 5 6 7 8 F E D C B A 5 6 7 8 GM D505 XH EW A SIDE B SR SL TP414 TP413 TP253 TP254 ...

Страница 20: ...20 1 2 3 4 1 2 3 4 F E D C B A GM D505 XH EW 4 2 NETWORK PCB B B NETWORK PCB B NETWORK PCB SIDE A SIDE B C CONNECTOR PCB C CONNECTOR PCB SIDE A SIDE B C A CN103 A A A 4 3 CONNECTOR PCB ...

Страница 21: ...Q 909 Transistor KSA812 D 201 Diode 1SS133 D 202 Diode 1SS133 D 301 Diode HZS7L B2 D 302 Diode HZS7L B2 D 303 Diode HZS7L B2 D 304 Diode HZS7L B2 D 601 Diode RM4Z LFJ4 D 602 Diode HZS7L B2 D 603 Diode 1SS133 D 604 Diode RM4Z LFJ4 D 606 Diode 1SS133 D 607 Diode 1SS133 D 608 Diode 1SS133 D 609 Diode 1SS133 D 610 Diode FML22R D 611 Diode FML22S D 612 Diode HZS16L 1 D 613 Diode HZS16L 1 D 614 Diode ER...

Страница 22: ... RD1 4PU102J R 404 RD1 4PU102J R 405 RD1 4PU512J R 406 RD1 4PU512J R 407 RS1 16S474J R 408 RS1 16S474J R 409 RS1 16S472J R 410 RS1 16S472J R 411 RS1 16S101J R 412 RS1 16S101J R 413 RS1 16S153J R 414 RS1 16S153J R 415 RD1 4PU560J R 416 RD1 4PU560J R 417 RD1 4PU270J R 418 RD1 4PU270J R 419 RD1 4PU220J R 420 RD1 4PU220J R 421 RD1 4PU240J R 422 RD1 4PU240J R 423 RS1 16S474J R 424 RS1 16S474J R 425 RS1...

Страница 23: ...E1002D R 809 RN1 10SE1002D R 810 RN1 10SE1002D R 811 RN1 10SE1002D R 812 RN1 10SE1002D R 813 RS1 16S562J R 814 RS1 16S562J R 815 RS1 16S562J R 816 RS1 16S562J R 817 RS1 16S511J R 818 RS1 16S511J R 819 RS1 16S514J R 820 RS1 16S514J R 831 RS1 16S471J R 832 RS1 16S471J R 833 RS1 16S223J R 834 RS1 16S223J R 835 RN1 10SE1002D R 836 RN1 10SE1002D R 837 RN1 10SE1002D R 838 RN1 10SE1002D R 839 RN1 10SE100...

Страница 24: ...A105J50 C 508 CFTLA105J50 C 509 CFTLA105J50 C 510 CFTLA105J50 C 511 CKSRYB471K50 C 512 CKSRYB471K50 C 513 CKSRYB471K50 C 514 CKSRYB471K50 C 517 CFTNA333J50 C 518 CFTNA333J50 C 519 CQMA102J50 C 520 CQMA102J50 C 551 CEAT220M50 C 552 CEAT220M50 C 553 CEAT101M50 C 554 CEAT101M50 C 555 CEAT220M50 C 556 CEAT220M50 C 557 CFTLA105J50 C 558 CFTLA105J50 C 559 CFTLA105J50 C 560 CFTLA105J50 C 561 CKSRYB471K50...

Страница 25: ...RYB472K50 C 856 CKSRYB472K50 C 857 CCSRCH470J50 C 858 CCSRCH470J50 C 859 CCSRCH470J50 C 860 CCSRCH470J50 C 901 220µF 10V HCH0012 NETWORK UNIT Consists of NETWORK PCB CONNECTOR PCB Unit Number HWG0030 Unit Name Network Unit MISCELLANEOUS IC 131 IC NJM2068MD IC 331 IC NJM2068MD S 131 Switch A HPF HSH0004 VR 131 Variable Resistor 20kΩ E A Freq CCS1266 VR 201 Variable Resistor 10kΩ A Sub Gain CCS1265 ...

Страница 26: ...Y 1 Fig 1 Remove the five screws Removing the Case Fig 1 Case 2 Remove the four screws 1 3 1 1 1 1 Fig 2 1 Removing the Amp Unit Fig 2 Remove the five screws and then remove the Amp Unit 3 Remove the three screws 2 Remove the three Fuses and then remove the Case 2 2 2 2 3 3 Fuse Amp Unit 1 1 1 1 1 ...

Страница 27: ...27 5 6 7 8 F E D C B A 5 6 7 8 GM D505 XH EW 7 1 2 CONNECTOR FUNCTION DESCRIPTION ...

Страница 28: ...5 Vs VRefl 24 SNL1 23 SNL2 22 GNLS 21 GNL 52 2 5V 51 NC 50 INR 49 INR 48 NC 47 NC 46 INL 45 INL 44 NC 43 NC 42 Vs Low 41 NC 40 5V DIG 39 NC 38 NTC 37 THWext 36 THWint 35 NC 34 O0 15 33 I OFCLK SGND 53 2 5V 54 MUTE 55 STBY 56 Feed R in 57 Vs3 58 Vs4 59 Vs VRefr 60 SNR1 61 SNR2 62 GNRS 63 GNR 64 TDA7570 TDA7294V MUTE STBY THERMAL SHUTDOWN S C PROTECTION 2 3 4 10 9 1 8 15 6 14 13 7 1 3 4 7 9 11 13 15...

Страница 29: ...signal The Vd signal has a fundamental frequency equal to that of the modulation frequency Fm the frequency of the modu lation signal Vm but will also contain the input signal and a band of frequency components around the modulation frequency The original signal Fvin is selected with a low pass filter cutting the high frequencies around the modulation frequen cy Fm Fvin original signal Fc cut off ...

Страница 30: ...eo with max output of 4 V or more adjust level to match the car stereo output level When you want to boost bass turn the bass level control clockwise Power Indicator The power indicator lights when the power is switched on BFC Beat Frequency Control Switch If you hear a beat while listening to an MW LW broadcast with your car stereo change the BFC switch using a small standard tip screwdriver HPF ...

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