PHiliphh MRX M3535A Defibrillator Louder speaker and Microphone Assembly
► Audio Problems
| Symptom | Possible Causes | Suggested Solution |
| No audio at all. | • Speaker failure. • Processor PCA failure. | • Check speaker connections. •Replace speaker/microphone assembly • Replace Processor PCA. |
| Audio is distorted. | • Damage to speaker cover. • Speaker damage or failure. • Processor PCA failure. | • Replace speaker label • Replace speaker/microphone assembly • Replace Processor PCA. |
| Buzzing noise when audio active. | • Damage to speaker label. • Debris between speaker and speaker label. • Speaker hardware loose. • Speaker failure. • Processor PCA failure. | • Replace speaker label. • Remove speaker label, clean out debris, install new speaker label. If debris is behind plastic housing, remove speaker, clean, and replace speaker. • Tighten hardware as needed. • Replace speaker/microphone assembly. • Replace Processor PCA. |
| Tones present but no voice prompt (in AED Mode). | • Software error or failed localization upgrade. • Processor PCA failure | • Reload the language. • Replace Processor PCA. |
| Voice prompt present but no tones. | Processor PCA failure | • Replace Processor PCA. |
► Speaker and Microphone Assembly
The speaker and microphone assembly can be removed without removing any other assembly from the front enclosure.
► Preparation
1. Open the enclosure and remove it.
2. Secure the front enclosure
Place the front cover on the work surface with the display facing down and the printer in the lower left corner.
► Removal
1. Disconnect the speaker and microphone from the PCA. Disconnect the four-wire connector by pulling it upward (1).
2. Remove the screw. Loosen and remove the T-10 screw securing the plastic cover and bracket to the chassis.
3. Remove the shield and bracket. Lift the shield and place it upward (2).
4. Note the position of each speaker, microphone, and cables. The speaker is diagonally forward of the speaker bracket. The microphone fits into a well-formed recess in the enclosure.
5. Remove the speaker and microphone. No one has anything to do with this case; just take them both.
► Replacement
1. Install the speakers and microphone.
To. Place the speaker connectors on the bottom. There are two ribs on the bottom of the speaker stand; the speaker sits on top of the ribs.
B. Place the microphone in the slot. Align the microphone cable with the notch in the slot.
2. Attach the protector and bracket. Make sure the red-black 4-wire harness and the white 2-wire harness go under the bracket.
3. Replace and tighten the screws.
4. Connect the speaker/microphone assembly. Connect the four-wire connector to the processor PCA.
5. Close the case.
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