TOA 900 SERIES AMPLIFIER A-912MK2 PROTECT LIGHT

I have freestanding Series 8 dishwasher. Its also possible the amp is on its last leg due to heat. Ask a Question Usually answered in minutes! This is the connector that connects the condenser to the PCB. I am getting a reading on both at 1. I looked at a couple other schematics and R is shown as a 27 ohm It may depend on the version ‘A’ vs ‘W’ Here is another manual, schematic at the end. I see TOA forgot protection diodes to the massive 70V line output transformer, so it’s not a tough design despite the reliability claims. That could cause it.

Home Pro Audio Installation Sound tdtactyzfyewassryrcrfcyauxz. Marvin Level 3 Expert Answers. R at 27R sorta matches the listed voltages for about 6. The email address entered is already associated to an account. Helpful 1 Not Helpful Flag. I would start testing transistors in the power amplifier section, and look for burnt parts. They have all the manuals for download Rate my help if you could and get back to me Thanks.

Did you seriea this forum helpful? Ask a Question Usually answered in minutes! This is a short or unstable ohm load. International orders are processed the next shipping day.

Help!! TOA series amp problem | Audioholics Home Theater Forums

Typically, shorted power amplifier transistors trip the DC protection circuit. Note this amplifier uses a servo circuit op-amps M which work to keep the idling output at 0VDC. D gives me a reading of 0. In Stock Update Location close. This will cause a short and send the amp into protect mode. Insert Jacks Insert jacks accommodate outboard signal processing.

TOA series ii Amplifier PMK2 If any of the voltages on the drivers amplifirr off, the amp offset would be off, and you said you measured 0 volts on L, Just to double check, measure the voltage on the white. External Mute Terminals Accommodate external mute switchers for remote mute operation.

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Also I did disconnect some connectors one at a time from the mainPCB to see if I could isolate the issue. How do you wire from the mixing board to an old.

The protect light is on and the amplifier will not function. Send a link to this item so recipient can review, customize or sdries for an alternate of equal or lesser value. Rated 5 out of 5 by Anonymous from Excellent Mixer amplifier Perfect feature set for small gaming arcade.

What is the voltage that is measured at L or where the two. Is that a LOW-Z input? R and R are rated for ohm. R at 27R sorta matches the listed voltages for about 6.

Find More Posts by Thedoc Page 1 of 3. Heat breaks down electronics part and eventually get worse. I looked at a couple other schematics and R is shown as a 27 ohm It may depend on the version ‘A’ vs ‘W’ Here is another manual, schematic at the end. Back View Show More Less. You can NOT look at a transistor and say it looks ok, you need to at least check them with a meter, even if the transistor is leaky or if a resistor is ie higher than its value is enough to unballance the amp and trip the protection circuit.

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TOA Electronics A-912MK2 Stereo Amplifier User Manual

Please assign your manual to a product: I could not amplifir a service manual or schematic for the “P” series, but did for the “W” series wall mount and “A” series, like AMK2 which may be similar. Can’t tell you how much to fix, Could be cheap or not worth it.

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Helpful 0 Not Helpful Comment Flag. You may want to remove the pc board and check the solder connections, if the boards been running hot the livht can break down and cause poor connections, that might be whats wrong.

You can’t post answers that contain an email address. Dominic Buchina Mar 18, Find More Posts by Bterrier. More Print this page Share this page. Modular Output Design Eight expansion output slots house modules that protedt line or microphone level connections. I agree that they appear to have been running very hot.

SOLVED: My toa amk2 amp does not work and the red – Fixya

If a resistor in circuit reads higher than rated value, reverse your meter’s leads and see if the reading changes. They have a square symbol next to them on the schematic. One of your speakers may be bad.

And check continuity between L and relay contact where R connects to relay That will check the thermal cutout M drives the relay, the relay contacts are S1 that connect the amp output to the speakers. At CNI get a voltage reading of TOA series ii Amplifier PMK2 I also failed to mention that there is a portion of the board which appears to have possibly overheated.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US. Be the first to review this item.