Qsc KW181 · powered sub
154 components · 29 parts identified · 4 photos. Tap a marked part to see what it is.
| Designator | Part (number or value) | Description | Package |
|---|---|---|---|
| C17 | 10uf 25v 1206 | cvcc smd ceramic capacitor 10uf 20pcnt 25v | 1206 |
| C18 | 10uf 25v 1206 | cvcc smd ceramic capacitor across +12vLow 10uf 25v | |
| C21 | - | cap | |
| C21 | - | across ucc fb and u3 | |
| C25 | - | parallel vcc +12vlow filter capacitor | |
| C36 | 473k250 | ||
| C37 | - | u4 +15v. | |
| C46, C89 | - | 0.047uf 250v | |
| C103 | - | u4 -15v. | |
| C115 | - | soft start cap | |
| C115 | - | across ucc ss_sd | |
| C117 | - | capacitor | |
| C117 | - | across ucc cs | |
| C118 | - | creamic across vref pin4 | |
| C126 | CDM 100 +-5% | mica dipped capacitor | |
| C127 | CDM 100 +-5% | mica dipped capacitor 100pf 500v | |
| C145 | - | psu-bias filter capacitor. aux bootstrap power for ucc vdd pin14 | |
| C148 | - | vcc cap | |
| C148 | - | psu-bias ucc vdd ceramic | |
| D6, D8 | ES1D | ||
| D7 | - | blocking diode in series with 78l12 output | |
| D7 | 5D | sot23 | |
| D9, D10 | BAS21 | bootstrap diode | |
| D14 | BAS21 | negative rectifier | |
| D23 | - | diode across aux out | |
| D23 | MBR230 | across aux out | |
| D24 | MBR230 | across ucc main out | |
| D25 | - | cs rectifier | |
| D25 | 5D | diode | sot23 |
| D27 | BAS21 | main fet gate discharge diode in parallel with two 10 ohm resistors r157 and r168 | sot23 |
| D28 | ES1D | +7v rail rectifier diode | |
| D29 | BAS21 | positive rectifier | |
| D31 | ES1D | +15v rail rectifier diode | |
| D32 | ES1D | -15v rail rectifier diode | |
| D33, D34 | FFP08S60S | diode | |
| D38 | MBR230 | reverse biased diode across +15v | |
| D39 | MBR230 | reverse biased diode across -15v | |
| F1 | 10a 5x20mm | main fuse 10a | 5x20mm |
| F2 | 1a 24v 1206 | +15v rail slow-blow SMT fuse 1a 24v | 1206 |
| F3 | 1a 24v 1206 | -15v rail slow-blow SMT fuse 1a 24v | 1206 |
| F4 | - | +7v rail slow-blow SMT fuse 1a 24v | 1206 |
| J2B | CO-000426-00 | dsp interface. Wire trap ribbon cable connector. | |
| J3 | - | speaker connector | |
| L11, L12, L13 | - | power filter coil | |
| Q2 | IRFB4020 | ch2 hs mosfet | |
| Q3 | IRFB4020 | ch2 ls mosfet | |
| Q4 | IRFB4020 | ch1 hs mosfet | |
| Q5 | IRFB4020 | ch1 ls mosfet | |
| Q13 | STP11NM60FD | aux mosfet | |
| Q14 | STW34NM60 | main mosfet | |
| Q14 | STW34NM60 | ||
| Q15 | MMBTA42 | drives the fb opto | |
| Q16 | MPSW01A | +12vLow regulator | to226 |
| R1 | - | u4 +15v current limiting resistor. 22 | |
| R2 | - | u4 -15v current limiting resistor. 22 | |
| R12, R15 | - | vcc current limiting resistor 21 ohm | 0805 |
| R38 | - | u2 +15v current limiting resistor. 22 | |
| R39 | - | u2 -15v current limiting resistor. 22 | |
| R65 | - | 11k | |
| R141, R155 | - | resistor | |
| R141 | - | rtdel gate drive output turn on delay time programming resistor. basically dtc dead time control | |
| R142 | - | rton, internal current source timing capacitor charging | |
| R143 | - | rtoff, internal current source timing capacitor discharging | |
| R149 | - | rslope, internal current source ramp | |
| R150 | 29.4k ohm 0805 | ||
| R151 | - | between vref and fb | |
| R153 | - | in series with cs | |
| R155 | - | across cs rectifier d25 output 2.87 ohm | |
| R157, R168 | 10 ohm 1206 | 10 ohm | |
| R161, R162 | - | 100 ohm 2w | |
| R174, R184 | - | 1r5 1w | |
| T1 | - | current sense transformer | |
| T2 | GENERIC SWITCHING POWER TRANSFORMER | ||
| T3 | - | q13 gate driver transformer | |
| U2 | LM319 | ch1 preamp opamp | |
| U3 | MOC205R2V-M | optoisolator providing feedback to ucc2893 for duty cycle control | |
| U4 | LM319 | ch2 preamp opamp | |
| U5 | IRS20957S | ch2 audio driver | |
| U6 | ZR431 | fb reference ic | |
| U7 | IRS20957S | ch1 audio driver | |
| U9 | LM19CIZ | amp mosfets heatsink temperature sensor going to pin4 of j2b to the mcu/dsp control board | |
| U9 | LM19CIZ | to92 | |
| U15 | UCC2893PW | tssop16 | |
| U15 | UCC2893PW | outputs 206khz 12v pulses with overshoot reaching around 17v. | |
| U16 | 8L12A | sop-8 | |
| U16 | LM78L12ACM | 12v ldo | sop8 |
| - | ceramic across pin4 | ||
| - | diode across main out | ||
| - | opto | ||
| - | amp output coil | ||
| - | parallel c113 c112 | ||
| - | +vcc cap | ||
| - | -vcc cap | ||
| - | wire | ||
| - | ntc | ||
| - | pin1 gnd | ||
| - | pin3. output | ||
| - | pin8. output | ||
| - | pin2 output through c4 for dual channel. | ||
| - | led | ||
| - | diode | ||
| - | amp mosfet | ||
| - | dsp interface connector | ||
| - | ch1 hs mosfet | ||
| - | ch1 ls mosfet | ||
| - | ch2 hs mosfet | ||
| - | ch2 ls mosfet | ||
| GENERIC CERAMIC CAPACITOR | u4 +15v. | ||
| GENERIC CERAMIC CAPACITOR | u4 -15v. | ||
| GENERIC CERAMIC CAPACITOR | u2 +15v. | ||
| GENERIC CERAMIC CAPACITOR | u2 -15v. | ||
| IRS20957S | audio driver | ||
| KBU1005G | bridge rectifier | kbu | |
| LM319 | opamp |
Marked, not identified yet: C33, C112, C113, C130, D19, D33, D34, D43, R158, R171, R175, R184