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General| Brand | Line 6 |
|---|---|
| Model | JM4 Looper |
| Category | Music Equipment |
| Language | English |
Details the Digital Signal Processor (DSP) and its Synchronous Dynamic Random-Access Memory (SDRAM) connections.
Covers the Microcontroller Unit (MCU), flash programmer interface, and master volume control circuitry.
Illustrates the User Interface (UI) connections and the Secure Digital (SD) card socket.
Diagrams input circuitry for Guitar, Auxiliary, Microphone, and CD/MP3 sources.
Shows the circuitry for the audio codec (CS42436) handling digital-to-analog and analog-to-digital conversion.
Details the output circuitry for Line, Amplifier (AMP), and Headphone connections.
Illustrates the power supply circuitry, including voltage regulators and filtering.
Install the top overlay onto the chassis.
Install the rear overlay onto the chassis.
Assemble the buttons onto the chassis.
Assemble the footswitch base with plunger, spring, and clip.
Insert the footswitch push pin and spring into the plunger.
Insert the footswitch light pipe into the footswitch base.
Install light pipes and the bezel onto the chassis.
Mount footswitch subassemblies to the chassis using screws and nuts.
Install UI PCBs (Middle, Upper, Lower) into the chassis.
Install foam pad on PCBA UI Upper to protect solder leads and ribbon cable.
Connect ribbon cables and install the main PCBA into the chassis.
Attach the bottom metal plate to the chassis using screws.
Install rubber feet onto the bottom plate.
Install logo, knobs, and encoder nut.
Install SD card frame, plastic nuts on jacks, and screws into XLR jack.
Apply the bar code serial number label.
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