Electro-voice ELX112P · powered speaker
141 components · 20 parts identified · 1 photo. Tap a marked part to see what it is.
151 traced nets on this board are available to technicians. See plans
| Designator | Part (number or value) | Marking | Description | Package |
|---|---|---|---|---|
| C22 | 820uf 200v radial 30x30 | -vcc 820uf 200v | ||
| C23 | 820uf 200v radial 30x30 | +vcc 820uf 200v | ||
| C30 | - | series resonant capacitor | ||
| C34 | GENERIC CERAMIC CAPACITOR | high side snubber | ||
| C35, R90 | - | low side snubber | ||
| C40, C41 | GENERIC CERAMIC CAPACITOR | +310 rail 0.1 | ||
| C68 | - | ac detect series capacitor | ||
| D2 | - | zener | ||
| D5, D6 | MURA220 | |||
| D11, D42, D43 | BAS316 | |||
| D12 | - | ca 552mv. | ||
| D13 | - | ac detect shunt rectifier diode | ||
| D17 | BZT52C12S | 12v zener for tl494 vcc regulator 667mv | sod323 | |
| D18 | BAS316 | 552mv | ||
| D19 | - | aux rectifier | ||
| D20 | - | zener 24v | ||
| D24 | BAT54WS | |||
| D29 | BAT54WS | l9 | sod323 | |
| D30 | - | ca 230mv. | ||
| D36 | - | dtc isolation diode. Prevents opto pin8 going low when t25(current sense detecor) collector goes low. | ||
| D37 | - | dtc isolation diode. Prevents opto pin6 going low when opto pin8 goes low. | ||
| J3 | - | power output connector | ||
| J5 | - | control and Vaux connector | ||
| R1, R55 | - | 01b | ||
| R21, R22 | - | 2.2M | ||
| R23 | 390 ohm 0402 | 390 | ||
| R24 | - | 01c 10k | ||
| R26, R98, R99 | - | 47k | ||
| R28 | - | 01b 1k | ||
| R29 | - | 2.2k | ||
| R40, R52 | - | 01c | ||
| R41 | 10 ohm 0402 | 10 | ||
| R46 | - | 18d | ||
| R48 | - | 01a 100 | ||
| R49 | 0.05 ohm 2512 | half bridge current sense reistor r050 | 2512 | |
| R50 | 10 ohm 0402 | |||
| R51, R78 | 10 ohm 0402 | 01x 10 ohm | ||
| R79 | 10 ohm 0402 | 10 ohm | ||
| R84 | 220 ohm 0402 | 220 | ||
| R85 | 220 ohm 0402 | |||
| R91 | - | high side snubber | ||
| R94 | - | 100k | ||
| R95 | - | otp ptc ~57 ohms 60 | ||
| R100 | - | ac detect series resistor 01c 10k | ||
| T1, T2 | - | t1t2 latch | ||
| T7 | BC846BW | |||
| T10 | BCP56-16 | be 639mv bc 637mv. tl494 npn vcc regulator | sot-223 | |
| T11 | 3B | pnp | ||
| T12 | - | npn | ||
| T13 | BC856B | 3b | dtc driver pnp | |
| T14 | KSP44 | npn ebc | to92 | |
| T19, T21 | 6B | H-bridge high side | ||
| T20, T22 | BC807-25 | H-bridge low side | ||
| T23 | BC807-25 | -25 gain grade. Half bridge hs gate discharge pnp | sot23 | |
| T24 | BC807-25 | half bridge ls gate discharge pnp | ||
| T25 | BC846BW | current sense npn | ||
| T30 | STP17NK40ZFP | half bridge high side | ||
| T31 | STP17NK40ZFP | half bridge low side | ||
| T35 | - | once DTC goes high aux power is cut | ||
| T36 | 6B | npn aux switch. | ||
| T37, T38 | - | t37t38 latch | ||
| TR3 | - | gate drive transformer. Drives the gates of half bridge that drives the main transformer. | ||
| U1 | TL494 | soic16 | ||
| U2 | - | dual opto | ||
| - | main transformer bootstrap/bias aux winding | |||
| - | transformer tr3 primary winding | |||
| - | ac inlet | |||
| - | 115/230 selection jumper | |||
| - | H bridge power supply resistor 10 ohm | |||
| - | opto 5-6 DC error | |||
| - | opto 7-8 pwm control | |||
| - | bridge rectifier | |||
| - | v+ | |||
| - | v- | |||
| - | auto amp enable output. Amplifier enabled when low. | |||
| - | gnd | |||
| - | +Vaux | |||
| - | -Vaux | |||
| - | amp error input. Goes to opto u2 | |||
| - | opto led anode and cathode. Goes to j3 pin4 and j5 +Vaux | |||
| - | feedback for pwm control | |||
| - | smps standby input | |||
| - | amp standby input | |||
| - | main transformer primary winding | |||
| - | tr3 low side output | |||
| - | tr3 high side output | |||
| - | main transformer secondary | |||
| - | tentative tr3 secondary | |||
| BC807-25 | ||||
| GENERIC 5X20MM |
Marked, not identified yet: C16, C29, C32, C33, C49, C62, C63, D1, D15, D16, D21, D22, D23, D25, D26, D35, D41, L5, R16, R17, R30, R31, R37, R65, R96, R97, T8, T9, T39, T43