Gemini BPM500 free download

File name Gemini-BPM500 preamp.pdf

SERVICE MANUAL BPM-500 Stereo Preamp Mixer CONTENT'S: Connections & Operations:...Page 2-5 Specifications:...Page 5 Parts Lists:...Page 6-8 PCBs:...Page 9-11 Schematics...Page 12 Gemini Sound Products Corp. 120 Clover Place P.O. Box 6928 Edison, NJ 08818-6928 732-738-9003 (Phone) · 732-738-9006 (Fax) Page 1 1 9 9 9 8 8 8 8 37 9 2 10 10 10 33 10 39 38 3 14 32 20 31 15 17 19 20 20 20 16 18 11 11 11 11 34 36 40 12 Page 2 25 29 27 28 30 26 4 41 5 13 35 42 7 6 21 22 23 24 43 64 46 45 46 47 48 49 50 45 51 52 53 54 55 57 59 60 62 63 47 48 49 50 51 52 54 55 57 59 60 62 Page 3 44 65 56 58 61 Connections 1. Before plugging in the power cord, make sure that the VOLTAGE SELECTOR (44) switch is set to the correct voltage. NOTE TE: NOTE This product is double insulated and not intended to be grounded. 2. Make sure that the POWER (39) switch is in the off position. The POWER LED (38) will be off. 3. The BPM-500 is supplied with 4 sets of amp output jacks. The BALANCED OUTPUT (45) jacks are used to connect to your main amplifier using standard XLR cables. We recommend using the balanced amp outputs if the cables to your amp are 25 feet or more. BALANCED OUTPUTS have three separate conductors, two of which are signal (positive and negative) and one shield (ground). Pin 1 is ground (shield). Pin 2 is signal hot (positive). Pin 3 is signal cold (negative). The MAIN OUTPUT (46) jacks are unbalanced and used to connect to your main amplifier. The REC OUTPUT (48) jacks can be used to connect the mixer to the record input of your recorder enabling you to record your mix. The BOOTH OUTPUT (47) jacks allow you to hook up an additional amplifier. 4. The MIC 1 (1) input (found on the front panel) accepts a 1/4" or XLR connector. The MIC 2 (63) input and the MIC 3 (53) input (found on the rear panel) accept 1/4" connectors. All accept balanced and unbalanced microphones. 5. On the rear panel are 3 stereo PHONO/LINE (55, 59, 62) inputs and 5 stereo LINE (51, 52, 54, 57, 60) inputs. The PHONO/LINE SWITCH (56) enables you to set the (55) input to Phono or Line. The PHONO/ LINE SWITCH (58) enables you to set the (59) input to Phono or Line. The PHONO/LINE SWITCH (61) enables you to set the (62) input to Phono or Line. The phono inputs will accept only turntables with a magnetic cartridge. A GROUND SCREW (64) for you to ground your turntables is located on the rear panel. The stereo line inputs will accept any line level input such as a CD player, a cassette player, etc. 6. Headphones can be plugged into the front panel mounted HEADPHONE (43) jack. 7. The BPM-500 comes with a fr