User manual ROLAND TR-808 SERVICE MANUAL

[. . . ] · Do not expose the unit to direct sunlight, place it near devices that radiate heat, leave it inside an enclosed vehicle, or otherwise subject it to temperature extremes. Excessive heat can deform or discolor the unit. 4 Maintenance · For everyday cleaning wipe the unit with a soft, dry cloth or one that has been slightly dampened with water. To remove stubborn dirt, use a cloth impregnated with a mild, nonabrasive detergent. Afterwards, be sure to wipe the unit thoroughly with a soft, dry cloth. [. . . ] By using an AC Adaptor, you can play without being concerned about how much battery power you have left. 3 6 * If there are batteries in the unit while an AC adaptor is being used, normal operation will continue should the line voltage be interrupted (power blackout or power cord disconnection). * If you are going to use an AC adaptor, be sure to use the specified unit (BOSS PSA-Series). Use of any other adaptor may result in damage, malfunction or electric shock. Also, if you are not going to be using it for an extended period of time, disconnect the AC adaptor from the AC outlet. 4 5 6 2. CHECK Indicator This indicator shows whether an effect is ON/OFF, and also doubles as the Battery Check indicator. If this indicator goes dim or no longer lights while an effect is ON, the battery is near exhaustion and should be replaced immediately. 5. Thumbscrew This thumbscrew is loosened to open the pedal, allowing battery replacement. For instructions on how to replace the battery, please refer to "CHANGING THE BATTERY (p. 12). " 6. INPUT Jack This jack accepts input signals (coming from a guitar, some other musical instrument, or another effects unit). * The INPUT jack also serves as the power switch. Power is turned on whenever a plug is inserted into the INPUT jack, and is turned off when the plug is disconnected. When not using the unit, you should disconnect any cord connected to the INPUT jack. 3. Pedal Switch, RATE Knob, DEPTH Knob, WAVE Knob Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . CHECK Indicator (Serves also as battery check indicator) Connectors . . . . . . . . . . . . . . . . . . . . . . INPUT Jack, OUTPUT Jack, AC Adaptor Jack (DC 9 V) Power Supply . . . . . . . . . . . . . . . . . . . DC 9 V: Dry Battery (6F22/ 9 V) AC Adaptor (PSA Series: Optional) Current Draw . . . . . . . . . . . . . . . . . . . 20 mA (DC 9 V) * Expected battery life under continuous use: Carbon: 10 hours These figures will vary depending on the actual conditions of use. 14 Dimensions . . . . . . . . . . . . . . . . . . . . . . 73 (W) x 129 (D) x 59 (H) mm 2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Owner's Manual, Dry Battery; 6F22/ 9 V (Carbon), Leaflet ("USING THE UNIT SAFELY, " "IMPORTANT NOTES, " and "Information") Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Adaptor PSA-Series * 0 dBu = 0. 775 Vrms * In the interest of product improvement, the specifications and/or appearance of this unit are subject to change without prior notice. 15 USING THE UNIT SAFELY WARNING Used for instructions intended to alert the user to the risk of death or severe injury should the unit be used improperly. Used for instructions intended to alert the user to the risk of injury or material damage should the unit be used improperly. * Material damage refers other adverse effects respect to the home furnishings, as well animals or pets. to damage or caused with and all its to domestic The symbol alerts the user to important instructions or warnings. The specific meaning of the symbol is determined by the design contained within the triangle. [. . . ] Never place it on stands that could wobble, or on inclined surfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 · Use only the specified AC adaptor (PSA-Series), and make sure the line voltage at the installation matches the input voltage specified on the AC adaptor's body. Other AC adaptors may use a different polarity, or be designed for a different voltage, so their use could result in damage, malfunction, or electric shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . · Avoid damaging the power cord. Do not bend it excessively, step on it, place heavy objects on it, etc. Never use a power cord after it has been damaged. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . · This unit, either alone or in combination with an amplifier and headphones or speakers, may be capable of producing sound levels that could cause permanent hearing loss. [. . . ]