JBL CS300.1 Service Manual

Also see for CS300.1: Owner's manual

Contents

Features, specifications and appearance are subject to change without notice.CONTROLS AND SETUPSYMPTOM LIKELY CAUSE SOLUTIONNo audio No voltage at BATT+ Check voltages at(POWER LEDs or REM terminals, amplifier terminalsare off) or bad or no ground with VOMconnectionNo audio Amplifier is Make sure amplifier(POWER overheated cooling is not blockedLEDs are on) at mounting location;verify speaker-systemimpedance is withinspecified limitsVoltage more than 16V Check vehicleor less than 8.5V on charging systemBATT+ connectionSYMPTOM LIKELY CAUSE SOLUTIONNo audio Voltage less than 9V on Check vehicle(POWER BATT+ connection charging systemLEDs flash)DC voltage on Amplifier may needamplifier output service; see enclosedwarranty card forservice informationDistorted audio Input sensitivity is Check INPUTnot set properly, or LEVEL setting; oramplifier or source check speaker wiresunit is defective for shorts or groundsDistorted audio Short circuit in Remove speaker leadsand POWER speaker or wire one at a time to locateLEDs flash shorted speaker orwire, then repairMusic lacks Speakers are not Check speaker“punch” connected properly connections forproper polaritySETTING THECROSSOVER(S)Determine your system plans and setthe crossover mode switch accordingly.If your system design does not includea subwoofer with the CS50.4, set thecrossover mode to FLAT and skip to“Setting Input Sensitivity.”Initially set the crossover frequencycontrol midway. While listening to music,adjust the crossover for the leastperceived distortion from the speakers,allowing them to reproduce as muchbass as possible.Systems using a separate subwoofer setthe crossover mode to HP (high pass) foryour full-range speakers. Adjust thecrossover frequency to limit bass andprovide increased system volume withless distortion.For subwoofers, choose the highestfrequency that removes vocal informationfrom the sound of the subwoofer.If using the CS50.4 to drive a subwoofer(s),set the crossover mode to LP (low pass).SETTING INPUTSENSITIVITY1. Initially turn the INPUT LEVEL control(s)to minimum (counter clockwise).2. Reconnect the (–) negative lead to thevehicle’s battery. Apply power to theaudio system and play a dynamic musictrack.3. On the source unit, increase the volumecontrol to 3/4 volume. Slowly increasethe INPUT LEVEL control(s) toward threeo’clock until you hear slight distortionin the music. Then reduce the INPUTLEVEL slightly until distortion is nolonger heard.NOTE: After the source unit is on, blueLEDs (on the top panel) will light, indicatingthe amplifier is on. If not, check the wiring,especially the remote connection from thesource unit. Also refer to “Troubleshooting”guide below.TROUBLESHOOTINGCS Series 300.14