QSC-PL6.0PFC-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 7 + 8 - 9 56 C E U14:2 EL2257C DS G 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 7 + 8 - 9 56 C E U13:2 EL2257C DS G 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 VP CLIP_FEED 5 + 6 - 7 CLIP 5V=187V

5、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 3 + 2 - 1 0.84 atten. 3 + 2 - 1 5 + 6 - 7 Positive = Clip VN VP With values s

6、hown, 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 3 + 2 - 1 +POL+ N_ISENSE VN VP P_ISENSE DIFF_AMP_BIAS -POL- _BOP _SPK_GND _SPK Closed loop gain =37.5 or 31.5 dB DN_DRV LOSS_OF_FEEDBACK VN UP_DRV RadioFans.CN 收音机爱 好者资料库 9 10 11 12

7、 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 LOSS_OF_FEEDBACK 8 7 6 4 3 2 1 CLIP_ MSP_IMON MSP_VMON STANDBY MSP_VMON MSP_IMONMSP_IMON D_GND MSP

8、_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 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

9、 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 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 begin

10、s 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 = 28V MAX. (Note that SMPS can also speed fan up.) B3_N _N_STEP FAN_N SNAPPER PTC 5 + 6 - 7 2 3

11、 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_SET _V50 VP Current gain: 22,460. 3.0 mA total set curent results in 68A peak output. Minumum

12、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 _BOP _BGND Total Gain = 16.85dB 5 + 6 - 7 5 + 6 - 7 3 + 2 - 1 Gain = 1/37.5 5 + 6 - 7 -POL- P_ISE

13、NSE 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 3 + 2 - 1 _N_STEP 5 + 6 - 7 N

14、OTE: 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 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

15、 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-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 A_VN A_+

16、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 SIG_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:

17、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 J601:9 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

18、_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 C402 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 R

19、adioFans.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 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 =

20、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 12 _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

21、 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 available. 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

22、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 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

23、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. 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

24、 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 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

25、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 flat 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 d

26、B 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-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 R

27、EREF 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 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

28、 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 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_GN

29、D 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 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 24

30、V. 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 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

31、 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 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_

32、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 = 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 oh

33、ms. 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 - 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

34、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