QSC-OL9.0PFC-pwr-sch维修电路原理图.pdf

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1、DR3 IX3 114 EL2257C U14:3 B3_P 1 + 14 - 13 32 C E U14:1 EL2257C DS G 7 + 8 - 9 56 C E U14:2 EL2257C DS G _VBOT PM_REF DR2 IX2 114 EL2257C U11:3 B2_N B2_P 1 + 14 - 13 32 C E U11:1 EL2257C 7 + 8 - 9 56 C E U11:2 EL2257C _VTOP _BOP DS G DS G This connects to chassis gnd at the rear panel. 12 _SPK _SPK_

2、GND 1 2 _BGND DS G DS G 7 + 8 - 9 56 C E EL2257C U12:2 1 + 14 - 13 32 C E U12:1 EL2257C IX1 DR1 114 U12:3 EL2257C B1_P B1_N ITEM NO.QTYPART NO.DESCRIPTIONVENDOR DS G 7 + 8 - 9 56 C E U13:2 EL2257C 1 + 14 - 13 32 C E EL2257C U13:1 DS G 114 U13:3 EL2257C B3_P IX4 DR4 RadioFans.CN 收音机爱 好者资料库 C126 22u-2

3、5V B3_N _VBOT 22u-25V C125 CWCCW W 5 U21:3 CA3054M96 14 13 4 3 2 1 CA3054M96 U21:1 DN_DRV HOT 22u-25V C129 _BOP PM_REF IX3 DR3 DR1 IX1 _BGND _VBOT _VTOP _BGND _BOP _VTOP _VBOT _BGND _BOP IX2 DR2 DR4 IX4 UP_DRV 7 6 12 11 9 8 CA3054M96 U21:2 RadioFans.CN 收音机爱 好者资料库 Limiter is shown in fast clip-tracki

4、ngmode. 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. VP VN GAIN_RETARD Gain = 1.67 5 + 6 - 7 REREF -POL- PRE_LIM +15V_ VP 116 3 + 8 75 1 4 - 2 84 -POL- VP -15V_ 3 + 2 - 1 10 Vpk clips the amp with NO LOAD. -

5、POL- VP CLIP_FEED 5 + 6 - 7 CLIP 5V=187V 3 + 2 - 1 _N_STEP Values shown preclip a fixed 5 volts below the rails up to 15 amps of output current. After that, preclip advances 120 mV per ampere output, for 12v preclip at 70 amps. Gain = 1/37.5 I_MON _V200 MUTE _BOP 0.84 atten. 5.95Vpk clips amp. 3 + 2

6、 - 1 3 + 2 - 1 5 + 6 - 7 Positive = Clip VN VP With values shown, the effective step switch time delay is 4us flat out to 50 KHz. CLAMP_SIG 14 + 9 1012 16 13 - 15 -POL- 5 + 6 - 7 +POL+ 3 + 2 - 1 N_ISENSE VN VP P_ISENSE DIFF_AMP_BIAS 650mV pk excursion Closed loop gain =37.5 or 31.5 dB 5.0 Vp=187.5 V

7、p -POL- _BOP _SPK_GND _SPK DN_DRV LOSS_OF_FEEDBACK VN UP_DRV RadioFans.CN 收音机爱 好者资料库 9 10 11 12 13 14 15 16 22u-25V C68 22u-25V C63 PRE_LIMPRE_LIM -15V_-15V_ +15V_+15V_ SMPS_VSMPS_V POST_POT_PPOST_POT_P POST_POT_NPOST_POT_N CH_IN_PCH_IN_P B1_N B1_P REREF -POL- +POL+ PRE_LIM SMPS_ON REREF PROTECT LOS

8、S_OF_FEEDBACK 8 7 6 4 3 2 1 CLIP_ MSP_IMON MSP_VMON STANDBY MSP_VMON MSP_IMONMSP_IMON D_GND MSP_VMON STANDBY SIG_GNDSIG_GND MODE_FLAG CH_IN_NCH_IN_N 5 3 + 2 - 1 280 KHz LPF +POL+ -POL- +15V 5 4 3 2 1 I_SET PSENABLE_K PSENABLE_A 8 7 6 SHED_VSHED_V PWR_GND PWR_GND PSENABLE_K PSENABLE_A I_SET CLIP 10 J

9、6:10 11 J6:11 12 J6:12 13 J6:13 +15V V_MON 14 J6:14 15 J6:15 16 J6:16 CLIP_FEED 47-10NP-10% C88 STANDBY_LED 7 J6:7 8 J6:8 1 J6:1 2 J6:2 4 J6:4 3 J6:3 5 J6:5 6 J6:6 9 J6:9 +POL+ VP VN -POL- VN VP STANDBY_LED POT_TOP POST_POT_P POST_POT_N SIG_GND SIG_GND REREF PROTECT +15V V_MON PWR_GND CLIP_FEED CLIP

10、CLIP PWR_GND RadioFans.CN 收音机爱 好者资料库 HOT=250uA 80 deg C. The HOT threshold is 80C Cutback begins at 100C and full shutdown happens at 110C. (+/- 3 degrees) 3 + 2 - 1 U1 2.5V-1% VP HOT 5V = 100 deg C. C55 22u-25V 4 3 Fan idles at 10V up to 60C. From 60C to 80C fan ramps from 10V to 24V. At 85C fan V

11、= 28V MAX. (Note that SMPS can also speed fan up.) B3_N _N_STEP FAN_N SNAPPER PTC 5 + 6 - 7 2 3 1 VP GAIN_RETARD VN 1 2 Nominal 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 reduces back linearily to normal speed. I

12、_SET _V50 VP Current gain: 22,460. 3.6 mA total set curent results in 81A peak output. Minumum at full cut-back is 250 uA or 5.6A output. 600ms delay to enable audio. 200ms delay to disable audio. 22u-25V C117 SMPS_ON DIFF_AMP_BIAS MUTE VN G DS PROTECT _BOP VN VP PSENABLE_K PSENABLE_A STANDBY_LED _B

13、OP _BGND 70A = 5V 5V = Current Limiting. Total Gain = 16.85dB 5 + 6 - 7 5 + 6 - 7 3 + 2 - 1 Gain = 1/37.5 5 + 6 - 7 186V = 5V -POL- P_ISENSE V_MON MSP_VMON _SPK_GND N_ISENSE MSP_IMON I_MON RadioFans.CN 收音机爱 好者资料库 3 + 2 - 1 3 volts here signifies 50 amps output, so load is likely 2 ohms. VN 3 + 2 - 1

14、 I_MON SHED_V _N_STEP _V50 VN PROTECT 3 + 2 - 1 VN VN VN 5 + 6 - 7 VN G DS V_MON LOSS_OF_FEEDBACK CLAMP_SIG _N_STEP 3 + 2 - 1 5 + 6 - 7 NOTE: This opamp must not clamp its input terminals together. TL072 or EQIV! _V100 _N_STEP _V150 5 + 6 - 7 VN 5 + 6 - 7 5 + 6 - 7 VN 3 + 2 - 1 DS G Clamps caps to 4

15、8-54V DS G _V200 2 1 5 4 3 _V100 _V150 C33 22u-25V 84 84 VN VN VP C19 22u-25V 22u-25V C48 22u-25V C49 C30 22u-25V C31 22u-25V 84 84 84 DS G _V50 B4_P B4_N _VTOP _VBOT _N_STEP RadioFans.CN 收音机爱 好者资料库 2 1 2 1 D DRAIN S SOURCE C CONTROL 2 63 7 1091413 B4_N B4_P B3_N B3_P 21 64 1 2 87 22u-25V C111 22u-2

16、5V C107 1211 B2_P B2_N VN B1_N 22u-25V C62 VP B1_P +15V 84 84 84 84 84 84 VN VP 84 C7 22u-25V C6 22u-25V RadioFans.CN 收音机爱 好者资料库 A_VN A_+15V A_V_MON A_PROTECT A_CLIP PWR_GND PWR_GND A_CLIP_FEED J501:16 J501:9 J501:10 J501:11 J501:12 J501:13 J501:14 J501:15 +POL+ A_POT_TOP A_POST_POT_N A_POST_POT_P S

17、IG_GND A_STANDBY_LED SIG_GND A_VP A_REREF J501:2 J501:3 J501:4 J501:5 J501:6 J501:7 J501:8 -POL- J501:1 R509 10K-DET-THRU-PCB TL072 U501:1 TL072 U501:2+POL+ RadioFans.CN 收音机爱 好者资料库 B_STANDBY_LED SIG_GND B_+15V B_V_MON B_PROTECT PWR_GND PWR_GND B_CLIP_FEED B_CLIP J601:16 J601:13 J601:14 J601:15 J601:

18、9 J601:10 J601:11 J601:12 J601:6 J601:7 J601:8 B_VP B_VN J601:2 J601:3 J601:4 J601:5 J601:1 R609 10K-DET-THRU-PCB +POL+ -POL- +POL+ B_POT_TOP B_POST_POT_N B_POST_POT_P SIG_GND B_REREF TL072 U601:2 TL072 U601:1 RadioFans.CN 收音机爱 好者资料库 SW1:3 SW1:4 SW1:1 SW1:2 U400:2 TL072 U400:1 TL072 220p C400 220p C

19、402 220p C300 220p C302 U300:2 TL072 U300:1 TL072 E3 E2 RadioFans.CN 收音机爱 好者资料库 220p C1 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 DR3 IX3 14 13 4 3 2

20、1 U28:1 CA3054M96 5 CA3054M96 U28:3 B3_P DS G 7 6 12 11 9 8 CA3054M96 U28:2 DS G _VBOT PM_REF Supplies: B1 = 30v at 100mA B2 = 20v at 50mA B3 = 40v at 60mA B4 = 27v at 50mA 5 CA3054M96 U26:3 IX2 DR2 B2_N 14 13 4 3 2 1 U26:1 CA3054M96 DS G B2_P _VTOP 7 6 12 11 9 8 CA3054M96 U26:2 DS G _SPK _SPK_GND 1

21、2 _BOP This connects to chassis gnd at rear panel. _BGND 1 2 DS G 7 6 12 11 9 8 CA3054M96 U24:2 B1_P 5 CA3054M96 U24:3 DS G 14 13 4 3 2 1 U24:1 CA3054M96 DR1 IX1 B1_N Puppetmaster voltages: 18.6 volts of zener in series with 56 ohms. Stackup: 11 2.4 1.2 18.6 = 33.2 volts of zener drop 40 volts avail

22、able. ITEM NO.QTYPART NO.DESCRIPTIONVENDOR DS G DS G 7 6 12 11 9 8 CA3054M96 U25:2 14 13 4 3 2 1 U25:1 CA3054M96 5CA3054M96 U25:3 B3_P IX4 DR4 RadioFans.CN 收音机爱 好者资料库 C126 22u-25V B3_N _VBOT 22u-25V C125 CWCCW W 5 U21:3 CA3054M96 14 13 4 3 2 1 CA3054M96 U21:1 DN_DRV HOT 22u-25V C129 _BOP PM_REF IX3

23、DR3 DR1 IX1 _BGND _VBOT _VTOP _BGND _BOP _VTOP _VBOT _BGND _BOP IX2 DR2 DR4 IX4 UP_DRV 7 6 12 11 9 8 CA3054M96 U21:2 RadioFans.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 sh

24、own by the arrow line. VP VN GAIN_RETARD Gain = 1.67 5 + 6 - 7 REREF -POL- PRE_LIM +15V_ VP 116 3 + 8 75 1 4 - 2 84 -POL- VP -15V_ 3 + 2 - 1 10 Vpk clips the amp with NO LOAD. -POL- VP CLIP_FEED 5 + 6 - 7 CLIP 5V=187V 3 + 2 - 1 _N_STEP Values shown preclip a fixed 5 volts below the rails up to 15 am

25、ps of output current. After that, preclip advances 120 mV per ampere output, for 12v preclip at 70 amps. Gain = 1/37.5 I_MON _V200 MUTE _BOP 0.84 atten. 5.95Vpk clips amp. 3 + 2 - 1 3 + 2 - 1 5 + 6 - 7 Positive = Clip VN VP CLAMP_SIG With values shown, the effective step switch time delay is 4us fla

26、t out to 50 KHz. 14 + 9 1012 16 13 - 15 -POL- 5 + 6 - 7 3 + 2 - 1 +POL+ N_ISENSE VN VP P_ISENSE DIFF_AMP_BIAS 650mV pk excursion Closed loop gain =37.5 or 31.5 dB 5.0 Vp=187.5 Vp -POL- _BOP _SPK_GND _SPK LOSS_OF_FEEDBACK DN_DRV UP_DRV VN RadioFans.CN 收音机爱 好者资料库 9 10 11 12 13 14 15 16 22u-25V C68 22u

27、-25V C63 PRE_LIMPRE_LIM -15V_-15V_ +15V_+15V_ SMPS_VSMPS_V POST_POT_PPOST_POT_P POST_POT_NPOST_POT_N CH_IN_PCH_IN_P B1_N B1_P REREF -POL- +POL+ PRE_LIM SMPS_ON REREF PROTECT LOSS_OF_FEEDBACK 8 7 6 4 3 2 1 CLIP_ MSP_IMON MSP_VMON STANDBY MSP_VMON MSP_IMONMSP_IMON D_GND MSP_VMON STANDBY SIG_GNDSIG_GND

28、 MODE_FLAG CH_IN_NCH_IN_N 5 3 + 2 - 1 280 KHz LPF +POL+ -POL- +15V 5 4 3 2 1 I_SET PSENABLE_K PSENABLE_A 8 7 6 SHED_VSHED_V PWR_GND PWR_GND PSENABLE_K PSENABLE_A I_SET CLIP 10 J6:10 11 J6:11 12 J6:12 13 J6:13 +15V V_MON 14 J6:14 15 J6:15 16 J6:16 CLIP_FEED 47-10NP-10% C88 STANDBY_LED 7 J6:7 8 J6:8 1

29、 J6:1 2 J6:2 4 J6:4 3 J6:3 5 J6:5 6 J6:6 9 J6:9 +POL+ VP VN -POL- VN VP STANDBY_LED POT_TOP POST_POT_P POST_POT_N SIG_GND SIG_GND REREF PROTECT +15V V_MON PWR_GND CLIP_FEED CLIPCLIP PWR_GND RadioFans.CN 收音机爱 好者资料库 HOT=250uA 80 deg C. The HOT threshold is 80C Cutback begins at 100C and full shutdown

30、happens at 110C. (+/- 3 degrees) 3 + 2 - 1 U1 2.5V-1% VP HOT 5V = 100 deg C. C55 22u-25V 4 3 Fan idles at 10V up to 60C. From 60C to 80C fan ramps from 10V to 24V. At 85C fan V = 28V MAX. (Note that SMPS can also speed fan up.) B3_N _N_STEP FAN_N SNAPPER PTC 5 + 6 - 7 2 3 1 VP GAIN_RETARD VN 1 2 Nom

31、inal 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 reduces back linearily to normal speed. I_SET _V50 VP Current gain: 22,460. 3.6 mA total set curent results in 81A peak output. Minumum at full cut-back is 250 uA o

32、r 5.6A output. 600ms delay to enable audio. 200ms delay to disable audio. 22u-25V C117 SMPS_ON DIFF_AMP_BIAS MUTE VN G DS PROTECT _BOP VN VP PSENABLE_K PSENABLE_A STANDBY_LED _BOP _BGND 70A = 5V 5V = Current Limiting. Total Gain = 16.85dB 5 + 6 - 7 5 + 6 - 7 3 + 2 - 1 Gain = 1/37.5 5 + 6 - 7 186V =

33、5V -POL- P_ISENSE V_MON MSP_VMON _SPK_GND N_ISENSE MSP_IMON I_MON RadioFans.CN 收音机爱 好者资料库 3 + 2 - 1 3 volts here signifies 50 amps output, so load is likely 2 ohms. VN 3 + 2 - 1 I_MON SHED_V _N_STEP _V50 VN PROTECT 3 + 2 - 1 VN VN VN 5 + 6 - 7 VN G DS V_MON LOSS_OF_FEEDBACK CLAMP_SIG _N_STEP 3 + 2 -

34、 1 5 + 6 - 7 NOTE: This opamp must not clamp its input terminals together. TL072 or EQIV! _V100 _N_STEP _V150 5 + 6 - 7 VN 5 + 6 - 7 5 + 6 - 7 VN 3 + 2 - 1 DS G Clamps caps to 48-54V DS G _V200 _V100 _V150 C33 22u-25V 84 84 VN VN VP C19 22u-25V 22u-25V C48 22u-25V C49 C30 22u-25V C31 22u-25V 84 84 84 DS G _V50 B4_P B4_N _VTOP _VBOT _N_STEP RadioFans.CN 收音机爱 好者资料库 2 1 2 1 D DRAIN S SOURCE C CONTROL 1091413 B4_N B4_P B3_N B3_P 21 64 1 2 87 22u-25V C111 22u-25V C107 1211 B2_P B2_N VN B1_N 22u-25V C62 VP B1_P +15V 84 84 84 84 84 84 VN VP 84 C7 22u-25V C6 22u-25V RadioFans.CN 收音机爱 好者资料库