Lab.gruppen-FP3400-pwr-sm维修电路原理图.pdf

mPQMM= pbosfb=jkri= = s=O iK=_= d=NSI=pbJQPQ=QQ=hrkdp_hI=ptbabk= mW=HQS=PMM=RS=OU=MM= cW=HQS=PMM=RS=OU=VV= K= KK= RadioFans.CN 收音机爱 好者资料库 = =p=j=mPQMM=m=N=EUF= = = = fP3400 Functional description for class TD amplifiers.3 Functional description schematics .5 Internal connections.6 Component list.7 Variant specific components.7 Description for variant dependent components.7 Sparepart list for fP3400.8 A20TDH Schematics for A20TDH.2 Board placement for A20TDH.3 Component list for A20TDH-32-2 - rev 02.4 A20TDL Schematics for A20TDL.2 Board placement for A20TDL.3 Component list for A20TDL - rev 02A.4 Variant specific components.7 Description for variant dependent components.8 IN2GTD Schematics for IN2GTD .2 Board placement for IN2GTD .3 Component list for IN2GTD - rev 02A.4 Variant specific components.7 Description for variant dependent components.8 LD92 Schematics for LD92 .2 Board placement for LD92.3 Component list for LD92 - rev 01.4 Variant specific components.5 Description for variant dependent components.6 SP80CB Schematics for SP80CB.2 Board placement for SP80CB.3 Component list for SP80CB-2x32-2 - rev 01A.4 SP80FA / SP80FB Functional description for switch mode powersupply SP80FA & SP80FB.2 Schematics for SP80FA & SP80FB.4 Schematics for SP80FA, SP80FB & PIND.5 SP80FA.6 Board placement for SP80FA - rev 04.6 Board placement for SP80FA - rev 06.7 Component list for SP80FA - rev 06.8 Variant specific components for 230V versions - rev 06.9 RadioFans.CN 收音机爱 好者资料库 = =p=j=mPQMM=m=O=EUF= = = = Variant specific components for 115V versions - rev 06.10 Description for variant dependent components.11 SP80FB.12 Board placement for SP80FB & PIND.12 Component list for PIND, SP80FB - rev 01A.13 Variant specific components for 230V versions - rev 01A.15 Variant specific components for 115V versions - rev 01A.16 Description for variant dependent components.17 RadioFans.CN 收音机爱 好者资料库 = =p=j=mPQMM=m=P=EUF= = = = c=qa= Theory of function The input signal is connected to the balanced amplifier and gain switch U1, U201 on the IN2GTD-board. The signal is then passing the gain control on the front panel, going to amplifier U2 (IN2GTD). The gain in this amplifier can be reduced by opto resistor U5 to prevent clipping in the output amplifier. Limiter Q1, Q2 together with the phase linear lowpassfilter U3, U4 limits the slewrate of the signal going to the output amplifier A20TDL, preventing intermodulation in this amplifier if signals of too high frequencies are presented on the input terminal. The output amplifier A20TDL works as an ordinary power amplifier with the difference that the collector voltage to the output transistors is supplied from the switch mode amplifier A20TDH. The base voltage of the output transistors Q26-Q28, Q31-Q33 (A20TDL) is sensed by voltage divider R36-R38 and is then sent to the adjustable limiter U3, U4 on the IN2GTD-board, before it reaches the input of the switch mode amplifier (A20TDH) . Limit level is set by the MLS switches S1 and S2. This limiter is used to limit the maximum output voltage from the amplifier. These switches also change the sensitivity for the led bars on the front panel. The amplifier U1 (U2) on the A20TDH-board makes sure that the output signal on terminal CP4 (CP8) is a copy of the input signal on terminal CP12, by giving correct control voltage to pulse width modulator U3. U3 compares this voltage with an 614kHz triangular wave giving a pulse width modulated output signal from Q1 (Q7) which is filtered by L1, C1 (L4, C10). The gain from the base of the output transistors on the A20TDL-board to the output of the A20TDH-board is equal to one. VR1 (VR2) is used to add a DC-offset on the input of U1 (U2) giving +7,5V (CP4) -7,5V (CP8) relative output of the LF-amplifier (CP6A), which is the same as collector-emitter voltage for the output transistors Q26-Q28 and Q31-Q33. Repairing instructions REQUIRED MEASUREMENT EQUIPMENT: -Audio generator -Dummy load, 16 ohm -AC-voltmeter/THD-meter -2 digital voltmeters -Two channel oscilloscope for audio 1. Without changing any fuses check the power supply +155V, -155V, +16V, -16V and +45V. If these arent OK go to the service manual for the power supply. (The +45V voltage is not regulated and can vary between 30 and 60V depending on the load of the power supply.) 2. If all fuses are OK, follow the signal from input to output, and repair in normal way. The best way is to place the amplifier on the front handles, loosen the rear panel, and mount it back on distances (delivered with this manual) to make it possible to measure. 3. If there is a fault in the power amplifier stage do as follows: 3:1 Turn VR1, VR2 (A20TDH) and VR3 (SP80FB) counter clockwise. 3:2 Short-circuit R38 on A20TDL-board. 3:3 Disconnect cables from CP23 and CP24 (A20TDL) (Q26-Q28 and Q31-Q33 collectors). 3:4 Replace broken fuses. (only for the channel you repair) 3:5 Connect DC-voltmeter (200V) to the positive (negative) rail voltage. 3:6 Connect another DC-voltmeter (20V) to the cable disconnected from CP23 (CP24). 3:7 Turn VR3 (SP80FB) slowly clockwise, and watch the voltmeters. Rail voltage should increase rapidly, collector voltage should read 0. After turning VR3 maximum 30, rail voltage should be 155V. RadioFans.CN 收音机爱 好者资料库 = =p=j=mPQMM=m=Q=EUF= = = = a) If the rail voltage is zero or very low, check Q1, D1A, D1B (Q7, D5A, D5B) (shorted) on the A20TDH- board. If Q1 (Q7) is broken, also replace R3 (R16) and D2 (D6). b) If the rail voltage is OK, turn VR1 (VR2) on the A20TDH-board slowly maximum clockwise. Voltage measured on the disconnected collector cable should stop at about 7,5V. c) If OK turn VR1 (VR2) (A20TDH) and TP3 (SP80FB) counter clockwise. 3:8 Repeat from 3:5 for the negative side. 3:9 Reconnect cable to CP23 (Q26-Q28 collector). 3:10 Connect dummy load 16 ohm to output, and connect an oscilloscope (10V/div) across the load. 3:11 Slowly turn VR3 (SP80FB) for 155V (-155V) rail voltage. 3:12 Slowly turn VR1 (VR2) (A20TDH) clockwise and look at the oscilloscope. There should be no DC on the oscilloscope. If there is DC (1V) repair the positive (negative) output section on the A20TDL-board. 3:13 Turn back VR1 (VR2) (A20TDH) and VR3 (SP80FB), and disconnect the cable from CP23 (Q26-Q28 collector). 3:14 Reconnect cable to CP24 (Q31-Q33 collector) and repeat from 3:11 for the negative side. 3:15 Reconnect cables to CP23 and CP24. Turn VR3 for 155V rail voltage. Turn VR1 clockwise, no DC on the oscilloscope. Then slowly turn VR2 clockwise. There can be some oscillation with VR2 in middle position, but it will stop at further turning. 3:16 Connect 1kHz sine wave to the input of the amplifier. Adjust gain until there is signal on the output. It should be a 7V PK sine wave with no distortion. 3:17 Disconnect short circuit from R38, and the amplifier will work. RadioFans.CN 收音机爱 好者资料库 = =p=j=mPQMM=m=R=EUF= = = = c= RadioFans.CN 收音机爱 好者资料库 = =p=j=mPQMM=m=S=EUF= = = = f= RadioFans.CN 收音机爱 好者资料库 = =p=j=mPQMM=m=T=EUF= = = = = - Safety critical component. Should only be replaced with the specified type. Position Partnumber Description Comment FAN201 F80 x25-24HS Fan 80 x80 x25mm 24VDC high speed FAN202 F80 x25-24HS Fan 80 x80 x25mm 24VDC high speed K201 3K4FUI9330_LAB Trafo. 3,4KW flyback U93/76/30 I93/28/30 core LAB. Rev01 P1 NL4MP_NEU Connector speakon 4pole NEUTRIK NL4MP P2 CASOC5P270_LAB Cable assembly socket crimp terminal 5pole L270mm LAB. Rev01 P3 SOIDC3P1M_AMP Socket IDC terminal 3pole 1module AMP 640441-3 P101 NL4MP_NEU Connector speakon 4pole NEUTRIK NL4MP P102 CASOC5P270_LAB Cable assembly socket crimp terminal 5pole L270mm LAB. Rev01 P103 SOIDC3P1M_AMP Socket IDC terminal 3pole 1module AMP 640441-3 P201 Variant dependent, see separate list P201A Variant dependent, see separate list S201 Variant dependent, see separate list S202 Variant dependent, see separate list VR1 VR10KLIN31_TOK Potentiometer 10K LIN 31step TOKOS B103 TP96N08 Y4929 Rev1 VR101 VR10KLIN31_TOK Potentiometer 10K LIN 31step TOKOS B103 TP96N08 Y4929 Rev1 s= Position 230V 115V P201 MLEU3x1.52.5mBLK SJOOW-3xAWG12 P201A - MP5-15P15A125V S201 RK2-0-10A15x21 - S202 - RK1-1-6A15x21 a= Partnumber Description MLEU3x1.52.5mBLK Mains lead EU Plug type CEE7/VII 3x1.5mm2 2.5m Black MP5-15P15A125V Mains plug type 5-15P 15A 125V RK1-1-6A15x21 Switch Rocker Single Pole Double Trough on - on 6A 15x21mm RK2-0-10A15x21 Switch Rocker Double Pole Single Trough on - off 10A 15x21mm SJOOW-3xAWG12 Cable SJOOW 3xAWG12 UL style 817 RadioFans.CN 收音机爱 好者资料库 = =p=j=mPQMM=m=U=EUF= = = = p=mPQMM= Completed modules Partnumber Description A20TDH-32-2 Amplifier high frequency 2kW class TD, variant 32-2 A20TDL-17-2 Amplifier low frequency 2kW class TD, variant 17-2 IN2GTD-2x17-2 2 channel input amplifier and gainswitch class TD, variant 2x17-2 LD92-2x32-2 Led display 9 x led 2 channel, variant 2x32-2 SP80CB-2x17-2 Switch mode powersupply 8kW capacitor bank, variant 2x32-2 SP80FA-2x17-2 Switch mode powersupply 8kW flyback board A, variant 2x17-2, 230V SP80FA-2x17-2U Switch mode powersupply 8kW flyback board A, variant 2x17-2U, 115V SP80FB-2x17-2 Switch mode powersupply 8kW flyback board B, variant 2x17-2, 230V SP80FB-2x32-2U Switch mode powersupply 8kW flyback board B, variant 2x17-2U, 115V Mecanical parts - Safety critical component. Should only be replaced with the specified type. Partnumber Description TCA20TDA-PBLK Top / bottom cover FP-FP3400 Front panel SPLA20TDA-A Side panel left SPRA20TDA-A Side panel right RP-FP3400 Rear panel 230V RP-FP3400U Rear panel 115V HDL2HEM5_MEN Handle DCSL1-PBLK Dustfilter clip left DCSR1-PBLK Dustfilter clip right DF139x62x5-20 Dustfilter left DF115x62x5-20 Dustfilter right KNBD18.5_TAI Gain potentiometer knob Screws Partnumber Description MRX3x10SV Machine screw, pan head, phillips, M3x10, black MFX3x12SV Machine screw, countersunk head, phillips, M3x12, black MFX3x20SV Machine screw, countersunk head, phillips, M3x20, black RTS-HST2.9x9.5SV Self tapping screw, pan head, torx, 2.9x9.5mm, black MC6S4x10FBB-SV Hexagon socket screw, cap head, M4x10 with spring washer, black LAB_T3x8-SV Top / bottom cover screw, torx, M3x8, black RadioFans.CN 收音机爱 好者资料库 = =p=j=OMqae=m=N=ETF= = = = A20TDH Schematics for A20TDH.2 Board placement for A20TDH.3 Component list for A20TDH-32-2 - rev 02.4 RadioFans.CN 收音机爱 好者资料库 = =p=j=OMqae=m=O=ETF= = = = p=OMqae= RadioFans.CN 收音机爱 好者资料库 = =p=j=OMqae=m=P=ETF= = = = _=OMqae= RadioFans.CN 收音机爱 好者资料库 = =p=j=OMqae=m=Q=ETF= = = = =OMqaeJPOJO=J=MO= - Safety critical component. Should only be replaced with the specified type. Position Partnumber Description Comment Side C1 330n250VMMK15 Capacitor polyester 330n 250V MMK 15mm Top C2 330n250VMMK15 Capacitor polyester 330n 250V MMK 15mm Top C3 330n250VMMK15 Capacitor polyester 330n 250V MMK 15mm Top C4 3u3160VMKP27.5 Capacitor polypropylene 3u3 160V MKP 27.5mm May have different value Top C5 1u50VMMK5 Capacitor polyester 1u 50V MMK 5mm Top C6 4n7200VX7R5%5 Capacitor ceramic 4n7 200V X7R 5% 5mm Top C7 470u10V10 x18A Capacitor electrolytic 470u 10V 10 x18mm axial Top C8 100n63VMMK5 Capacitor polyester 100n 63V MMK 5mm Top C9 10u50V Capacitor electrolytic 10u 50V 5mm Top C10 330n250VMMK15 Capacitor polyester 330n 250V MMK 15mm Top C11 330n250VMMK15 Capacitor polyester 330n 250V MMK 15mm Top C12 330n250VMMK15 Capacitor polyester 330n 250V MMK 15mm Top C13 3u3160VMKP27.5 Capacitor polypropylene 3u3 160V MKP 27.5mm May have different value Top C14 1u50VMMK5 Capacitor polyester 1u 50V MMK 5mm Top C15 4n7200VX7R5%5 Capacitor ceramic 4n7 200V X7R 5% 5mm Top C16 470u10V10 x18A Capacitor electrolytic 470u 10V 10 x18mm axial Top C17 100n63VMMK5 Capacitor polyester 100n 63V MMK 5mm Top C18 10u50V Capacitor electrolytic 10u