QSC-KSeries-spk-sch 维修电路原理图.pdf
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1、SCHEMATIC ASSOCIATION-PC-003311-00 FOR ALL MODELSWP-003311-00 K8WP-003312-00 K10WP-003313-00 K12WP-003314-00 KSUBCOMPONENT NOTES-2-WAY MEANS ONLY FOR K8/10/12SUB MEANS ONLY FOR KSUBVALUE AS SHOWN AFTER NOTEDNI MEANS DO NOT INSERTINPUT BOARD17 MAR 200931 AUG 2009ABCHG C13, C14, C25, R73, R77, R173 VA
2、LUE31 JUL 200929 JAN 2010CHG C52 TO Y1 TYPE. ECO 9591 CHG R141 AND R143 VALUE. ECO 9377CC1PROD RLSE W/O CHG. ECO 9034ADD D15, D16, ECO 9457PLUMBING SCHEDULEA1: MAIN PCB AUDIOMAIN BOARDC2: XCAP CHASSISP1: MAIN PCB POWERC1: INPUT PCB CHASSIS-GROUND SCHEDULE+/-VCC: AMPLIFIER RAILSVDD2: INPUT BOARD +7VV
3、DD1: MAIN BOARD +7V+/-15V_D: INPUT BOARD AUDIO+/-15V_C: INPUT BOARD RAW+/-15V_B: AMP CH 2 AUDIO+/-15V_A: AMP CH 1 AUDIO+/-15V: MAIN BOARD RAW-1. THIS DRAWING USED IN CONJUCTION WITH ASSEMBLY WP-003311-00.POWER_SUPPLYAMPDSPK SERIES 2-CH AMPSH-003311-00D. GALVANEVAN SHULTZ29 OCT 200930 JUL 2009D. DELA
4、RM29 JUL 2009SUBVERSIONAR-003311-00.ZIPNONEINPUTFB4FB3BB2FB2FB1BB1MIX-OUT+12VLOW+VCC11111INPUT_OUTPUTMIX-OUTDSPMIX-OUTPOWER_SUPPLY-VCC+VCC+12VLOWBadboard_Mark1Board_Fiducial1Board_Fiducial1Badboard_Mark1Board_Fiducial1Board_Fiducial1AMP-VCC+VCC+12VLOWDWG NO.CAD FILE NO.SCHEMATIC DIAGRAMNOTES: UNLESS
5、 OTHERWISE SPECIFIEDOF QSC AUDIO PRODUCTS, THAT MAY NOTBE DISCLOSED, REPRODUCED OR USEDINFORMATION WHICH IS THE PROPERTYTHIS DOCUMENT CONTAINS PROPRIETARYSIZE43EFF. DATECHKREVISIONSREVDESCRIPTION4321WITHOUT EXPRESS WRITTEN CONSENT FROMCONTRACT NO.21DATEPLOT DATE:ISSUEDCSCALE00PW4CAGE CODEAPPROVALSSE
6、ED FILE NO.CHECKEDDRAWNCOSTA MESA, CALIFORNIAAUDIO PRODUCTS, LLC.Troubleshoot notes: Rev A, (Revised date: July 22th, 2011)A. General Notes. a. AC voltage thresholds: operate at above 70 V and shutdown at below 50 V. b c. Firmwares (FW): four revisions as follow: f. Service Bulletin: 1. Service bull
7、etin #KSE0001revA, Issue date: Oct 2009, Title: K Series inductor reinforcement. L13 g. Troubleshoot hints: 1. Power supply failures: - No blown MOSFETs Q13 & Q14. Check for broken/cracked lead of inductors L11, L12, L13. . Idle current: 120V and 230V 0.2A; short limit current: less than 1A per CH 1
8、. FW Rev A - Initial release. 2. FW Rev B - Increased turn on mute time to avoid signal passing when the system powers off with certain AC input situations. 3. FW Rev C - Increased the fan turn on voltage because some fans wouldnt come on at the initial startup voltage. 4. FW Rev D - Adjusted fan th
9、resholds to accommodate hardware changes and modified limiters based on amplifier updates. Notes: FW Rev D IS NOT compatible with older amplifiers which have FW Rev A-C and vise versa amplifier with FW Rev D cannot be downgrade to earlier FW revisions (A-C). d. K-Series power amplifier is class D, s
10、o passive low-pass filter (Audio Precision AUX-0025) is required for all measurements - power, %THD, etc. e. Circuitry revisions. 1. ECO# 9377, Rev B, Eff. date: Jul 2009: - Change R141 and R143 2. ECO# 9457, Rev C, Eff. date: Aug 2009: - Change C13, C14, C25, R73, R77, R173, & FW rev D. Add D15, D1
11、6. Due to circuitry changes on both DSP and Power boards, new and old revisions are incompatible and require correct firmware revision. - Blown MOSFETs Q13 & Q14. Always replace both MOSFETs and diodes D33 & D34 2. Blown MOSFETS outputs of Amplification circuit: - Always replace both MOSFETs on the
12、defective channel. If the amplifier still has problem, check its driver - U5 for Q2 & 3 and U7 for Q4 & Q5.B. Top Box Power Module with DSP feature disabled. To disable DSP, pull out the GAIN B knob, use a install a shunt across pins 2 & 4 if header J7 has 10 pins (early K Series production with PCB
13、 rev A & B, till Feb 2010) or across a. Setup: * Apply a 10 mVrms, 1k Hz sinewave to only XLR input of MIC/LINE IN A; set only GAIN A control fully up; set MIC/LINE switch to LINE. * K & KW Output Adapter (SG-000576-TS): set the MODE switch to BYPASS. Do not apply any load on the HF channel if the a
14、dapter is not available to avoid overloading the HF channel. b. Output measurements: 1. Output = 1.0 Vrms; LF output and HF output are 180 degree out of phase. 2. Turn the MIC/LINE switch to MIC position. 3. Verify an increase of 24.5 dB gain (16.75 Vrms). 4. Turn both gain controls down. Disconnect
15、 the signal from LINE IN As input and feed the same signal onto either RCA input. Turn only GAIN B control fully up and verify each output (should be 2 Vrms). Repeat this step to check other RCA input. 5. Turn gain control B down. Disconnect input from RCA and then feed the signal into LINE IN Bs XL
16、R input. Change the input amplitude to 300mV. Turn GAIN B control fully up. Verify output on each channel; should be 101 W 8-ohm with 0.2% THD or 28.5 Vrms 6. Change the input amplitude to 560 mV. Verify output on each channel; should be 358 W 8-ohm with 1.0% THD or 53 Vrms. Note: red LIMIT LED turn
17、s on; it is normal. pins 4 & 6 if header J7 has 6 pinsC. Sub Box Power Module with DSP feature disabled. To disable DSP, pull out the GAIN knob, locate W2 on the right side of the gain pot, and temporarily short two pads of W2 together by soldering a piece of wire on them. a. Setup: b. Output measur
18、ements: 1. Output power in bridge (two channel outputs are combined) should be 425 W 8-ohm with 0.2% THD 3. Change the input amplitude to 800 mV. Verify output power; it should be 760 W 8-ohm with 3V/1.80V); DS = 36K (0.5V/3V)- Q3: GS = 3M (0.6V/1.7V); GD = 3M (3V/1.80V); DS = 36K (0.5V/3V)SH4: B3 &
19、 C4SH4: C4 &SH3: B4SH4: B2 & C2T106-26B 79T 18AWGON ABOUT 24VACOC = 26.1A = 0.75V+85V-85VOFF IN 30MS+7VTOTAL OPERATING CURRENT = 32MAGATE DRIVE CURRENT:(102NC + 40NC) * 200K = 29MAUCC2893 RUN CURRENT = 3MA MAXAC DETECTOR0.5*960UF*375V2 = 67.5J22AWG AUX100X40AWG LITZ SEC100X40AWG LITZ PRIEE42 3C90LIN
20、EUV = 1.27VUNIVERSAL INPUT POWER SUPPLYMMST3904MMST3904IMBD414820 PCNT1.0UF1 PCNT1.13K1 PCNT1/10WBAS211/10W1010 PCNT25V20 PCNT125VACSTW26NM60500V1 PCNT2.21K7.87KIMBD414811K1 PCNT1/8W82.5K20 PCNT1.0UF20 PCNTMOC205R2V-M1800UF5 PCNT10025V16V1000UF1.0A24V1 PCNT2W100ZR431100V5 PCNT1800UF100MMBTA421W11K1/
21、10W1 PCNT5 PCNT120PF5 PCNT200VES1D2SC2655BAT54S100V0.68UF5 PCNTBAS21FFP08S60S100V1 PCNT2.87220PF50V5 PCNT1.00K1 PCNTIMBD41481/10WBAS2120 PCNT16V1.0UFUCC289316V5 PCNT5 PCNT1W1W1W1 PCNT82.5K1 PCNT5 PCNT1 PCNT1/10W20 PCNT1/10W1 PCNT1/10W1/8W0.022UF1 PCNT10 PCNT25V0.1UF1/10W1 PCNT1/10W1 PCNT1/10W1 PCNT1
22、00K1/10W63.4K1 PCNT4MH1/8W1/8W1 PCNT243K100K6.34K1.55 PCNT1W0.047UF10 PCNT250V250V0.047UF10 PCNT1W1.556K1W0.68UF1/10W3.65K3.65K1 PCNT1/10W5 PCNTMBR23020 PCNT2W100500V5 PCNT100PF500V2W5 PCNTFFP08S60S1/10W1 PCNT6.34K100UF20 PCNT100UF150K1 PCNT0.68UF10 PCNT250VAC0.1UF1/10W17.8K1 PCNT1/8W1/8W150K1 PCNT5
23、00V10 PCNT0.022UF500V10 PCNTKBU100520 PCNT82.5K100UF100250VAC1 PCNT1 PCNT200V10 PCNT25V25V10UF20 PCNT1/10W63.4KMOC205R2V-M1 PCNT1 PCNT1/10W0.1UF25V10 PCNTMBR2300.1UF1 PCNT1/8W101/8W101 PCNTMBR2301 PCNT211/10W16V1.0UF20 PCNT16VES1D10 PCNT0.1UF25VLM78L12A20 PCNT1000UF16VIMBD41485 PCNT200V120PF1/10W1 P
24、CNT10016V20 PCNT1.0UF1 PCNT1/10WES1D1/10W1/8W1/8W20 PCNT5 PCNT10 PCNT0.68UF4MH125VACNTC10A1 PCNT243K1 PCNT2431.0A120PFES1D5 PCNT250V0.68UF200V120PFMBR23024V25VES1D1001/10W25V24V1.0ASTP11NM60FD250V0.0022UF1002.5 OHMS125VAC20 PCNT0.0022UF243400V20 PCNT470UF400V20 PCNT470UF1/10W250VAC0.1UF10020 PCNT1/1
25、0W1/10W5 PCNT100PF11K82.5K10 PCNT5 PCNT20 PCNT11K1W5 PCNT5 PCNT250V5 PCNT1.13K1 PCNTBAS21UCC28930.1UF10 PCNT25V1/10W1 PCNT768220PF10 PCNT250VAC0.0022UF29.4K11K1 PCNT0.022UF1/10W10 PCNT500V0.022UF774UHSH-003311-00AR-003311-00.ZIPNONED33D34D43D40D27D25D28D31D32D29D24D23BR1Q13Q14T1T1T3T3D35C115C118C148
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