QSC-OL9_0PFC-pwr-sch 维修电路原理图.pdf

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1、DR3IX3114EL2257CU14:3B3_P1+14-1332CEU14:1EL2257CDSG7+8-956CEU14:2EL2257CDSG_VBOTPM_REFDR2IX2114EL2257CU11:3B2_NB2_P1+14-1332CEU11:1EL2257C7+8-956CEU11:2EL2257C_VTOP_BOPDSGDSGThis connects tochassis gnd at therear panel.12_SPK_SPK_GND12_BGNDDSGDSG7+8-956CEEL2257CU12:21+14-1332CEU12:1EL2257CIX1DR1114U

2、12:3EL2257CB1_PB1_NITEM NO.QTYPART NO.DESCRIPTIONVENDORDSG7+8-956CEU13:2EL2257C1+14-1332CEEL2257CU13:1DSG114U13:3EL2257CB3_PIX4DR4RadioFans.CN 收音机爱 好者资料库C12622u-25VB3_N_VBOT22u-25VC125CWCCWW5U21:3CA3054M9614134321CA3054M96U21:1DN_DRVHOT22u-25VC129_BOPPM_REFIX3DR3DR1IX1_BGND_VBOT_VTOP_BGND_BOP_VTOP_V

3、BOT_BGND_BOPIX2DR2DR4IX4UP_DRV76121198CA3054M96U21:2RadioFans.CN 收音机爱 好者资料库Limiter is shown in fast clip-trackingmode.To convert to a slow attack/release limiter,open the 3 places shown shorted with lines,and make the connection shown by the arrow line.VPVNGAIN_RETARDGain = 1.675+6-7REREF-POL-PRE_LI

4、M+15V_VP1163+87514-284-POL-VP-15V_3+2-110 Vpk clips the ampwith NO LOAD.-POL-VPCLIP_FEED5+6-7CLIP5V=187V3+2-1_N_STEPValues shown preclip a fixed5 volts below the rails up to 15 amps of output current.After that, preclip advances120 mV per ampere output,for 12v preclip at 70 amps.Gain = 1/37.5I_MON_V

5、200MUTE_BOP0.84 atten.5.95Vpkclips amp.3+2-13+2-15+6-7Positive = ClipVNVPWith values shown, the effectivestep switch time delay is 4usflat out to 50 KHz.CLAMP_SIG14+910121613-15-POL-5+6-7+POL+3+2-1N_ISENSEVNVPP_ISENSEDIFF_AMP_BIAS650mV pkexcursionClosed loop gain=37.5 or 31.5 dB5.0 Vp=187.5 Vp-POL-_

6、BOP_SPK_GND_SPKDN_DRVLOSS_OF_FEEDBACKVNUP_DRV91011121314151622u-25VC6822u-25VC63PRE_LIMPRE_LIM-15V_-15V_+15V_+15V_SMPS_VSMPS_VPOST_POT_PPOST_POT_PPOST_POT_NPOST_POT_NCH_IN_PCH_IN_PB1_NB1_PREREF-POL-+POL+PRE_LIMSMPS_ONREREFPROTECTLOSS_OF_FEEDBACK8764321CLIP_MSP_IMONMSP_VMONSTANDBYMSP_VMONMSP_IMONMSP_

7、IMOND_GNDMSP_VMONSTANDBYSIG_GNDSIG_GNDMODE_FLAGCH_IN_NCH_IN_N53+2-1280 KHz LPF+POL+-POL-+15V54321I_SETPSENABLE_KPSENABLE_A876SHED_VSHED_VPWR_GNDPWR_GNDPSENABLE_KPSENABLE_AI_SETCLIP10J6:1011J6:1112J6:1213J6:13+15VV_MON14J6:1415J6:1516J6:16CLIP_FEED47-10NP-10%C88STANDBY_LED7J6:78J6:81J6:12J6:24J6:43J6

8、:35J6:56J6:69J6:9+POL+VPVN-POL-VNVPSTANDBY_LEDPOT_TOPPOST_POT_PPOST_POT_NSIG_GNDSIG_GNDREREFPROTECT+15VV_MONPWR_GNDCLIP_FEEDCLIPCLIPPWR_GNDHOT=250uA 80 deg C.The HOT threshold is 80CCutback begins at 100C and full shutdown happens at 110C.(+/- 3 degrees)3+2-1U12.5V-1%VPHOT5V = 100 deg C.C5522u-25V43

9、Fan idles at 10V upto 60C. From 60C to80C fan ramps from 10V to 24V. At 85Cfan V = 28V MAX.(Note that SMPS canalso speed fan up.)B3_N_N_STEPFAN_NSNAPPER PTC5+6-7231VPGAIN_RETARDVN12Nominal I_SET = 3ma to 5ma.Amp is fully on at I_SET1ma.Above 3ma fan is unaccellerated.From 3ma to 1ma speed rises.Belo

10、w 1ma fan speed reducesback linearily to normal speed.I_SET_V50VPCurrent gain: 22,460.3.6 mA total set curent results in 81A peak output.Minumum at full cut-back is250 uA or 5.6A output.600ms delay to enable audio.200ms delay to disable audio.22u-25VC117SMPS_ONDIFF_AMP_BIASMUTEVNGDSPROTECT_BOPVNVPPS

11、ENABLE_KPSENABLE_ASTANDBY_LED_BOP_BGND70A = 5V5V = Current Limiting.Total Gain = 16.85dB5+6-75+6-73+2-1Gain = 1/37.55+6-7186V = 5V-POL-P_ISENSEV_MONMSP_VMON_SPK_GNDN_ISENSEMSP_IMONI_MON3+2-13 volts here signifies50 amps output, soload is likely 2 ohms.VN3+2-1I_MONSHED_V_N_STEP_V50VNPROTECT3+2-1VNVNV

12、N5+6-7VNGDSV_MONLOSS_OF_FEEDBACKCLAMP_SIG_N_STEP3+2-15+6-7NOTE: This opamp must notclamp its input terminals together. TL072 or EQIV!_V100_N_STEP_V1505+6-7VN5+6-75+6-7VN3+2-1DSGClamps caps to 48-54VDSG_V20021543_V100_V150C3322u-25V8484VNVNVPC1922u-25V22u-25VC4822u-25VC49C3022u-25VC3122u-25V848484DSG

13、_V50B4_PB4_N_VTOP_VBOT_N_STEP2121DDRAINSSOURCECCONTROL26371091413B4_NB4_PB3_NB3_P2164128722u-25VC11122u-25VC1071211B2_PB2_NVNB1_N22u-25VC62VPB1_P+15V848484848484VNVP84C722u-25VC622u-25VA_VNA_+15VA_V_MONA_PROTECTA_CLIPPWR_GNDPWR_GNDA_CLIP_FEEDJ501:16J501:9J501:10J501:11J501:12J501:13J501:14J501:15+PO

14、L+A_POT_TOPA_POST_POT_NA_POST_POT_PSIG_GNDA_STANDBY_LEDSIG_GNDA_VPA_REREFJ501:2J501:3J501:4J501:5J501:6J501:7J501:8-POL-J501:1R50910K-DET-THRU-PCBTL072U501:1TL072U501:2+POL+B_STANDBY_LEDSIG_GNDB_+15VB_V_MONB_PROTECTPWR_GNDPWR_GNDB_CLIP_FEEDB_CLIPJ601:16J601:13J601:14J601:15J601:9J601:10J601:11J601:1

15、2J601:6J601:7J601:8B_VPB_VNJ601:2J601:3J601:4J601:5J601:1R60910K-DET-THRU-PCB+POL+-POL-+POL+B_POT_TOPB_POST_POT_NB_POST_POT_PSIG_GNDB_REREFTL072U601:2TL072U601:1SW1:3SW1:4SW1:1SW1:2U400:2TL072U400:1TL072220pC400220pC402220pC300220pC302U300:2TL072U300:1TL072E3E2220pC1DR3IX314134321U28:1CA3054M965CA30

16、54M96U28:3B3_PDSG76121198CA3054M96U28:2DSG_VBOTPM_REFSupplies: B1 = 30v at 100mA B2 = 20v at 50mA B3 = 40v at 60mA B4 = 27v at 50mA5CA3054M96U26:3IX2DR2B2_N14134321U26:1CA3054M96DSGB2_P_VTOP76121198CA3054M96U26:2DSG_SPK_SPK_GND12_BOPThis connectsto chassis gndat rear panel._BGND12DSG76121198CA3054M9

17、6U24:2B1_P5CA3054M96U24:3DSG14134321U24:1CA3054M96DR1IX1B1_NPuppetmaster voltages:18.6 volts of zenerin series with 56 ohms.Stackup:112.41.218.6= 33.2 volts of zener drop40 volts available.ITEM NO.QTYPART NO.DESCRIPTIONVENDORDSGDSG76121198CA3054M96U25:214134321U25:1CA3054M965CA3054M96U25:3B3_PIX4DR4

18、C12622u-25VB3_N_VBOT22u-25VC125CWCCWW5U21:3CA3054M9614134321CA3054M96U21:1DN_DRVHOT22u-25VC129_BOPPM_REFIX3DR3DR1IX1_BGND_VBOT_VTOP_BGND_BOP_VTOP_VBOT_BGND_BOPIX2DR2DR4IX4UP_DRV76121198CA3054M96U21:2Limiter is shown in fast clip-trackingmode.To convert to a slow attack/release limiter,open the 3 pla

19、ces shown shorted with lines,and make the connection shown by the arrow line.VPVNGAIN_RETARDGain = 1.675+6-7REREF-POL-PRE_LIM+15V_VP1163+87514-284-POL-VP-15V_3+2-110 Vpk clips the ampwith NO LOAD.-POL-VPCLIP_FEED5+6-7CLIP5V=187V3+2-1_N_STEPValues shown preclip a fixed5 volts below the rails up to 15

20、 amps of output current.After that, preclip advances120 mV per ampere output,for 12v preclip at 70 amps.Gain = 1/37.5I_MON_V200MUTE_BOP0.84 atten.5.95Vpkclips amp.3+2-13+2-15+6-7Positive = ClipVNVPCLAMP_SIGWith values shown, the effectivestep switch time delay is 4usflat out to 50 KHz.14+910121613-1

21、5-POL-5+6-73+2-1+POL+N_ISENSEVNVPP_ISENSEDIFF_AMP_BIAS650mV pkexcursionClosed loop gain=37.5 or 31.5 dB5.0 Vp=187.5 Vp-POL-_BOP_SPK_GND_SPKLOSS_OF_FEEDBACKDN_DRVUP_DRVVN91011121314151622u-25VC6822u-25VC63PRE_LIMPRE_LIM-15V_-15V_+15V_+15V_SMPS_VSMPS_VPOST_POT_PPOST_POT_PPOST_POT_NPOST_POT_NCH_IN_PCH_

22、IN_PB1_NB1_PREREF-POL-+POL+PRE_LIMSMPS_ONREREFPROTECTLOSS_OF_FEEDBACK8764321CLIP_MSP_IMONMSP_VMONSTANDBYMSP_VMONMSP_IMONMSP_IMOND_GNDMSP_VMONSTANDBYSIG_GNDSIG_GNDMODE_FLAGCH_IN_NCH_IN_N53+2-1280 KHz LPF+POL+-POL-+15V54321I_SETPSENABLE_KPSENABLE_A876SHED_VSHED_VPWR_GNDPWR_GNDPSENABLE_KPSENABLE_AI_SET

23、CLIP10J6:1011J6:1112J6:1213J6:13+15VV_MON14J6:1415J6:1516J6:16CLIP_FEED47-10NP-10%C88STANDBY_LED7J6:78J6:81J6:12J6:24J6:43J6:35J6:56J6:69J6:9+POL+VPVN-POL-VNVPSTANDBY_LEDPOT_TOPPOST_POT_PPOST_POT_NSIG_GNDSIG_GNDREREFPROTECT+15VV_MONPWR_GNDCLIP_FEEDCLIPCLIPPWR_GNDHOT=250uA 80 deg C.The HOT threshold

24、is 80CCutback begins at 100C and full shutdown happens at 110C.(+/- 3 degrees)3+2-1U12.5V-1%VPHOT5V = 100 deg C.C5522u-25V43Fan idles at 10V upto 60C. From 60C to80C fan ramps from 10V to 24V. At 85Cfan V = 28V MAX.(Note that SMPS canalso speed fan up.)B3_N_N_STEPFAN_NSNAPPER PTC5+6-7231VPGAIN_RETAR

25、DVN12Nominal I_SET = 3ma to 5ma.Amp is fully on at I_SET1ma.Above 3ma fan is unaccellerated.From 3ma to 1ma speed rises.Below 1ma fan speed reducesback linearily to normal speed.I_SET_V50VPCurrent gain: 22,460.3.6 mA total set curent results in 81A peak output.Minumum at full cut-back is250 uA or 5.

26、6A output.600ms delay to enable audio.200ms delay to disable audio.22u-25VC117SMPS_ONDIFF_AMP_BIASMUTEVNGDSPROTECT_BOPVNVPPSENABLE_KPSENABLE_ASTANDBY_LED_BOP_BGND70A = 5V5V = Current Limiting.Total Gain = 16.85dB5+6-75+6-73+2-1Gain = 1/37.55+6-7186V = 5V-POL-P_ISENSEV_MONMSP_VMON_SPK_GNDN_ISENSEMSP_

27、IMONI_MON3+2-13 volts here signifies50 amps output, soload is likely 2 ohms.VN3+2-1I_MONSHED_V_N_STEP_V50VNPROTECT3+2-1VNVNVN5+6-7VNGDSV_MONLOSS_OF_FEEDBACKCLAMP_SIG_N_STEP3+2-15+6-7NOTE: This opamp must notclamp its input terminals together. TL072 or EQIV!_V100_N_STEP_V1505+6-7VN5+6-75+6-7VN3+2-1DS

28、GClamps caps to 48-54VDSG_V200_V100_V150C3322u-25V8484VNVNVPC1922u-25V22u-25VC4822u-25VC49C3022u-25VC3122u-25V848484DSG_V50B4_PB4_N_VTOP_VBOT_N_STEP2121DDRAINSSOURCECCONTROL1091413B4_NB4_PB3_NB3_P2164128722u-25VC11122u-25VC1071211B2_PB2_NVNB1_N22u-25VC62VPB1_P+15V848484848484VNVP84C722u-25VC622u-25V