Akai-ASR-8025-SSP-Service-Manual(1) 电路图 维修手册.pdf

SERVICE MANUAL Model: ASR8025SSP www.akai.ru RadioFans.CN 收音机爱 好者资料库 General safety instructions Contents To avoid the risk of an electronic shock, you shouldCover- -P1 not expose the device to rain or moisture. Consequently,General safety instruction-P2 do not use the device in the immediate vicinity of water,Exploded view of the Subwoofer- P3 for example near a bath tub, a swimming pool or in a Exploded view of the satellite-P4 damp cellar.Schematic diagram-P5 Use the device only for the intended purpose.Drawing of PCB board-P6-P9 only connect the device at a properly installed plug so-Part list-P10 cket. Pay attention that the specified voltage corres-Familiar malfunction analysis-P11 ponds to the voltage of plug socket. when using external mains supply, pay attention to the correct polarity and voltage. Always place the batteriesSpecification Data: in the correct direction.RMS output:110W(35W+15W*5) Assemble the device in such a way that the availableSpeaker Unit: ventilation openings are not covered.subwoofer: 5.25 Never open the housing of the device. Incorrect repsatellite: 3*5 airs can consitute a considerable risk of the user.Distortion: 0.3% 1W 1KHz Should the device become damaged, in particular theFrequency Response: 30Hz-20KHz mains supply cable, do not operate the device any S/N Ratio: =60dB longer, but rather have it repaired by an expert.Seperation: =45dB Check the mains supply cable regularly for damage. For safety reasons a broken or damaged mains lead may only be replaced by an equivlent lead from the manufacturer, our customer service department or a similary qualified person. These symbols may be found on the unit and are in tended to indicate the following: the lightning symbol should advise the user of parts in the inside of the device which carry dangerously high voltage level. the symbol with an exclamation mark should advise the user of important operation or maintance instructions in the accompanying documentation. 2 RadioFans.CN 收音机爱 好者资料库 EXPLODED VIEWS OF THE SUBWOOFER RadioFans.CN 收音机爱 好者资料库 EXPLODED VIEW OF THE SATELLITE 4 AA C23 100P C30 47U/25V R25 18K R262.2 R24 1k R22 22K C2822P C31 224 IC5TDA2030A(1006) C37 100P C40 47U/25V R3318K R372.2 R35 1k R28 22K C3922P C42 224 IC7TDA2030A(1006) C44 100P C48 47U/25V R4118K R432.2 R42 1k R38 22K C4722P C49 224 IC9TDA2030A(1006) C50 100P C57 47U/25V R4618K R502.2 R47 1k R45 22K C5222P C58 224 IC10TDA2030A(1006) C63 100P C65 47U/25V R5318K R552.2 R54 1k R51 22K C6222P C66 224 IC11 TDA2030A(1006) FRONT R L SURROUND R L CENTER SUBWOOFER C22.2U C3 4.7U/25V R518K R9 2.2 R13 1K R2 22K C7 224 IC1 TDA2030A(1006) IC3A 4558 IC3B 4558 R7 47K C4101 R11 10K R6 10K R13 10K C1 104 C5 104 C4 2.2U SW SPEAKER 3 SW1 SW 6DPDT R15 22K R16 22K L SURROUND R L CENTER R FRONT D 87654321 D 12345678 B CC B Title NumberRevisionSize Date:15-Jun-2006Sheet of File:D:5.1HCS1100Z.DDBDrawn By: AS-R8025/8035SSP Amplifier Schematic Diagram AKAI 1.0 1/1 D2 IN5404*4 T1 12.5V*2 2.7A T 1AL 250V C64 4700U/25V C55 4700U/25V IC TDA2030A(1006) C43 104 C8 104 IC 4558 R1 220 R3 220 C12 100U/16V C2 100U/16V PLUG AC230V 50HZ SW3POWER 103M/250AC R15 18K R20 2.2 C19 224 IC4 TDA2030A(1006) R17 1K R14 22K C17 4.7U/25V R8 22K 2A D4 D5 D6 C21 22U/50V R21 1K C9 2.2U C101 2.2U FR VOL C201 2.2U FL VOL C301 2.2U SR VOL C401 2.2U SL VOL C501 2.2U CEN VOL 1 2 3 4 5 6 7 IN 1 2 3 4 5 6 7 IN 2 3 1 411 5 6 7 9 10 8 14 13 12 +28V 1 2 3 4 5 6 7 8 9 10 VFD AC6V R205 100k R204 5.6K R203 2.7K R202 1K DZ103 IN4148 C419 1uF/50V R424 10K R423 1K +28V 1 2 3 4 5 VFD_POWER&AI CON101 R422 2.2 DZ102 IN5399 C418 220/uF35V AC6V +28V R201 330U102 LM324 DRAWING OF PCB BOARD 6 7 8 9 FAMILIAR MALFUNCTION ANALYSIS OF AFTER-SERVICE Malfunction 1: P? Suggest ? 1) Check if power plug is well connected to power. 2) Check if switch is set in ON 3) Fuse was melted. (Need checked by professional and replacing) Malfunction 2: Pehenomenon: Subwoofer no sound Suggest resolvent: 1) Check if turned up master volume, subwoofer volume 2) Check if have set to 2.1 input 3) Check if have input signal that under 200Hz frequency Malfunction 3: Pehenomenon: Whole system no sound Suggest resolvent: 1) Check if input audio frequency cable is well connected. 2) Check if output audio frenquency equipment are working Malfunction 4: Pehenomenon: 5.1 Channel output no sound Suggest resolvent: 1) Check if input cable is well connected to 5.1 channel input RCA 2) Check if mode have set to 5.1 Malfunction 5: Pehenomenon: resonance while power on Suggest resolvent: 1) Need checked & repaired by professional. 11