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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)
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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
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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
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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 front panel BNC LIGHT (37) jack. This jack is for use with a gooseneck light like the Gemini GNL-700. 8. There are LOOP INPUTS (50) and LOOP OUTPUTS (49) located on the rear panel. If you are using an outboard signal processor, you can use the LOOP OUTPUTS (49) to send the signal to the device and the LOOP INPUTS (50) to bring the signal back in to the mixer. The unit comes with jumpers to be used with the loop inputs and outputs. Keep the jumpers in the unit if you are not using the loop to prevent interruptions in your music program.
Operation
1. POWER ON: Once you have made all the equipment connections to your mixer, press the POWER SWITCH (39). The power will turn on and the POWER LED (38) will glow RED. 2. CHANNEL 1: The GAIN (8), HIGH (9), MID (10), and LOW (11) controls allow you to fully adjust the selected source. Switch # (12) allows you to select the PHONO 1/LINE 1 (62) or the LINE 2 (60) input. The CHANNEL SLIDE (13) controls the input level of this channel. 3. CHANNEL 2: The GAIN (8), HIGH (9), MID (10), and LOW (11) controls allow you to fully adjust the selected source. Switch # (14) allows you to select the PHONO 2/LINE 3 (59) or the LINE 4 (57) input. The CHANNEL SLIDE (15) controls the input level of this channel. 4. CHANNEL 3: The GAIN (8), HIGH (9), MID (10), and LOW (11) controls allow you to fully adjust the selected source. Switch # (16) allows you to select the PHONO 3/LINE 5 (55) or the LINE 6 (54) input. The CHANNEL SLIDE (17) controls the input level of this channel. 5. CHANNEL 4: The GAIN (8), HIGH (9), MID (10), and LOW (11) controls allow you to fully adjust the selected source. Switch # (18) allows you to select the LINE 7 (52), LINE 8 (51) or the MIC 3 (53) input. The CHANNEL SLIDE (19) controls the input level of this channel. NOTE TE: NOTE There is Low, Mid and High equalization for each channel with an extremely wide range of adjustment. SUGGESTION: You can use the Cut Features on each channel to remove Low, Mid and/or High to create special effects. 6. CROSSFADER SECTION: The CROSSFADER (26) allows the mixing of one source into another. The BPM-500 features an assignable crossfader. The ASSIGN (23, 28) switches allow you to select which channel will play through each side of the crossfader. The ASSIGN (23) switch has 4 settings (1, 2, 3 or 4) and allows you to select channel 1, 2, 3 or 4 to play through the left side of the crossfader. The ASSIGN (28) switch has 4 settings (1, 2, 3 or 4) and allows you to select channel 1, 2, 3 or 4 to play through the right side of the crossfader. There are two OFF (22, 30) buttons for the crossfader. When the OFF (22) button is pressed, the left side of the crossfader will be inactive and the OFF LED (21) will light. When the OFF (30) button is pressed, the right side of the crossfader will be inactive and the OFF LED (29) will light. Using the OFF button, be sure to deactivate the crossfader before changing the ASSIGN setting. This will avoid any click or popping sound in your signal while you are changing the assign setting. The CROSSFADER (26) in your unit is removable and if the need arises can be easily replaced. Crossfader units are available in three varieties. Part # RF-45 (which is identical to the crossfader supplied with the mixer) has a 45 mm travel from side to side. Part # RF-30 is available with a 30 mm travel distance. Also available is the PSF-45 with a special curve designed for scratch mixing. Just purchase one of these crossfader units from your Gemini dealer and follow these instructions: 1. Unscrew the outside FADER PLATE SCREWS (B). Do not touch the INSIDE SCREWS (C). 2. Carefully lift the fader and unplug the CABLE (D). 3. Plug the new fader into the cable and place it back in the mixer. 4. Screw the fader to the mixer.
Using the Ground Lift Switch
Depending on your system configuration, sometimes applying the ground will create a quieter signal path. Sometimes lifting the ground can eliminate ground loops and hum to create a quieter signal path. 1. With the mixer on, listen to the system in idle mode (no signal present) with the ground applied (the GROUND LIFT SWITCH (65) in the left position). 2. Then turn the power off before moving the GROUND LIFT SWITCH (65). Lift the ground by moving the GROUND LIFT SWITCH to the right, turn the power back on and listen to determine which position will provide a signal devoid of background noise and hum. Keep the GROUND LIFT SWITCH in the ground position if the noise level remains the same in either position. CAUTION: DO NOT TERMINATE THE AC GROUND ON THE POWER MIXER IN ANY WAY. TERMINATION OF THE AC GROUND CAN BE HAZARDOUS.
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7. BPM DISPLAY: There are BPM DISPLAYS (24, 27) for the two channels assigned to each side of the CROSSFADER (26). They update approximately every beat and digitally display the Beats Per Minute allowing you to match the beats visually. BPM DISPLAY (24) reflects the Beats Per Minute of the channel assigned to the left side of the CROSSFADER, and BPM DISPLAY (27) reflects the Beats Per Minute of the channel assigned to the right side of the CROSSFADER. NOTE TE: NOTE A [- -] reading will appear on the BPM DISPLAY if the track has unclear beats. The [- -] reading will also appear if there is no signal present. 8. The BEAT OFFSET INDICATORS (25) light when the tracks of the two channels assigned to the crossfader are within 11 BPMs of each other and display how aligned the beats of the two channels are. When the RED LEDs light, the beats are not aligned. When the YELLOW LEDs light, the beats are almost aligned. When the GREEN LED lights, the beats are aligned perfectly. NOTE If the diffence between the two channel's beats NOTE TE: exceed 11 BPM, the BEAT OFFSET INDICATORS will not light. SUGGESTION: You can use the BPM DISPLAYS to determine which tracks have similar or the same Beats Per Minute. When mixing two tracks with similar Beats Per Minute, you can use one source's pitch control to align the Beats Per Minute with the other source's BPM. The BPM DISPLAYS and the BEAT OFFSET INDICATORS update every beat and will reflect the change in BPM and indicate when the beats are aligned. NOTE TE: NOTE Beat mixing is a skill that requires practice. Not every track has a strong beat, and beat mixing works best with tracks with clear and strong beats. 9. LOOP SECTION: Removing the jumpers from the LOOP OUTPUT (49) and LOOP INPUT (50) jacks will activate the loop. Any device connected between the LOOP OUTPUT (49) and LOOP INPUT (50) jacks will be inserted into the signal path. 10. OUTPUT CONTROL SECTION: The level of the MAIN OUT (45, 46) is controlled by the MASTER (35) slide. Activating the MONO (33) button (the mono LED will light) makes the overall output mono. The BOOTH (36) control adjusts the level of the BOOTH OUTPUT (47). HINT: The booth output is used by some DJs to run monitor speakers in their DJ booth. You can also use it as a second ZONE or AMP output. NOTE TE: NOTE The RECORD OUT (48) has no level control. The level is set by the channel slides and the gain controls of the selected channel. The tonal qualities are set by the low, mid and high controls of that same channel. 11. TALKOVER SECTION: The purpose of the talkover section is to allow the program playing to be muted so that the mic can be heard above the music. The MIC/TALKOVER SWITCH (7) controls MIC 1 and MIC 2 and has three settings. When the MIC/TALKOVER SWITCH (7) is in the bottom position, MIC 1 and MIC 2 and talkover are off. When the MIC/TALKOVER SWITCH (7) is in the center position MIC 1 and MIC 2 are on, the MIC INDICATOR (6) will glow, but talkover is off. When the MIC/TALKOVER SWITCH (7) is in the top position, MIC 1 and MIC 2 and talkover will be on and the volume of all sources except the MIC 1 and MIC 2 inputs are lowered by 16 dB. The TREBLE (2) and BASS (3) controls allow you to fully adjust the tone of MIC 1 and MIC 2. MIC 1 LEVEL (5) controls the level of MIC 1. The MIC 2 LEVEL (4) controls the level of MIC 2. 12. CUE SECTION: By connecting a set of headphones to the HEADPHONE (43) jack, you can monitor any or all of the channels. Press the CUE ASSIGN (20) buttons for channels 1 - 4 to select the channel or channels to be monitored and their respective LED indicators will glow. Use the CUE LEVEL (40) control to adjust the cue volume without effecting the overall mix. By moving the CUE PGM PAN (42) control to the left you will be able to monitor the assigned cue signal. Moving the control to the right will monitor the PGM (program) output. Use the CUE SPLIT (41) button to split the signals from cue and program so that cue will be heard in one earphone and program will be heard in the other earphone.
13. DISPLAY: The peak hold, dual function DISPLAY (31) indicates either the MASTER (45, 46) output left and right levels OR the the selected cue and program (premaster output) levels. You can choose the option you want by pressing the DISPLAY (32) button. NOTE TE: DISPLAY NOTE When the DISPLAY (31) is in the cue/program mode, by adjusting GAIN (8) you can increase or decrease the (8), signal to match the other channel's signal.
Specifications
INPUTS: DJ Mic....................................................1.5mV 2Kohm balanced Phono.........................................................................3mV 47Kohm Line.......................................................................150 mV 27Kohm OUTPUTS: Amp/Booth......................................................0 dB 1V 400ohm Max..............................20V Peak to Peak Rec...........................................................................225mV 5Kohm MIC 1 & MIC 2: DJ Mic....................................................1.5mV 2Kohm balanced Bass......................................................................................± 12dB High.......................................................................................± 12dB MIC 3: DJ Mic....................................................1.5mV 2Kohm balanced Controls...........................................................................Channel 4 GENERAL: Bass (Chnls 1-4)...............................................................+ 12dB/- 32 dB Mid (Chnls 1-4)..................................................................+ 12dB/- 32 dB Treble (Chnls 1-4)..............................................................+ 12dB/- 32 dB Gain (Chnls 1-4)..............................................................0 to -20dB Frequency Response....................................20Hz - 20KHz +/- 2dB Distortion................................................................................0.02% S/N Ratio...............................................................better than 80dB Talkover Attenuation..............................................................-16dB Headphone Impedance.........................................................16ohm Power Source.............................................115/230V 50/60Hz 20W Dimensions..........................................................19"w x 4"h x 9"d Weight........................................................................10.2 lbs
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Parts Lists
Cabinet Parts and Packing
Item # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 Description PANEL CONTROL BRACKET VR COVER BOTTOM PANEL REAR HOLDER X-FADER PROTECTOR PLATE FOR 115/230V SWITCH SWING LEVEL (LONG) PCB SPACER SUPPORT PCB SPACER SUPPORT KNOB PUSH (SMALL) BUSHING FOR KNOB (SMALL) KNOB SLIDE (BIG) KNOB SLIDE (SMALL) KNOB ROTARY (B) KNOB INLAY (BLACK); BALANCE,MASTER,MIC,CUE,BOOTH KNOB INLAY (RED); GAIN KNOB INLAY (GRAY); TREBLE,BASS,LOW,MID,HIGH PLATE DISPLAY (SMALL) HOLDER LED VR INLAY PLATE LED HOLDER LED 3fLED (17mm) HOLDER LED 3f (7mm) PAD FOOT GND SCREW HOLDER BUSHING LED BNC DUST PROOF CLOTH VR DUST PROOF CLOTH (SMALL) VR DUST PROOF CLOTH SWING DUST PROOF CLOTH SCREEN SNAP RIVET DRYER PAN-HEAD MACHINE SCREW; PMS 2.6X4(B) BAND-HEAD TAPPING SCREW /TW-E; BTB-3/TW-3 3X6(AB) BAND-HEAD TAPPING SCREW; BTS-3 3X5(AB) BAND-HEAD TAPPING SCREW; BTS-3 3X6(AB) BAND-HEAD TAPPING SCREW; BTS-3 3X10(AB) PAN-HEAD TAPPING SCREW/TWIN SCREW; PTS-2 3X8(AB) TWIN FLAT-HEAD TAPPING SCREW; FTS-3 3X6(AB) BAND-HEAD MACHINE SCREW; BMS 3X2X4 FLAT-HEAD TAPPING SCREW; FTS-3 3X12(AB) NUT/WASHER PAN-HEAD MACHINE SCREW; PMS 2X4(B) Part # 002-199 021-760 021-335A 021-991 022-360 022-305 023-674 047-474 047-468 002-531 002-532 002-713 002-714 003-131 148-236 148-238 148-239 003-372 003-989A 003-970 003-370 003-969 003-711 049-206 146-710 003-993 159-201 159-167 159-171 159-216 046-024 003-612 190-062 102-025 121-003 111-051A 111-046A 111-044A 110-153A 111-043A 107-015 111-049A 131-081 102-007
Printed Circuit Boards
Item # 1 2 3 4 5 6 7 8 9 Description PRINTED CIRCUIT BOARD PS-900-1; IN/OUT PRINTED CIRCUIT BOARD BPM500-2; MAIN PRINTED CIRCUIT BOARD BPM500-3; MASTER VR PRINTED CIRCUIT BOARD BPM500-4; FADER PRINTED CIRCUIT BOARD BPM500-5; DJ MIC PRINTED CIRCUIT BOARD BPM500-6; PHONES PRINTED CIRCUIT BOARD PS-900-8; PHONO/LINE PRINTED CIRCUIT BOARD BPM250-7; BIT AMP PRINTED CIRCUIT BOARD BPM250-8; BIT DISPLAY (CEM-1 41×166mm) Part # 162-940 262-019 262-022 262-020 262-021 262-023 162-955 162-979 162-980
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Parts Lists - PCB1 Input/Output
ICs
Item # 1 2 3 4 Designators IC8 IC1-6 IC7 IC10 INTEGRATED INTEGRATED INTEGRATED INTEGRATED Description CIRCUIT NJM4556L CIRCUIT NJM2068LD CIRCUIT NJM7812FA CIRCUIT NJM7805FA Part # 074-113 074-145 074-107 074-074
Transistors
Item # 1 2 Designators Q1-5, Q7 Q6 Description TRANSISTOR 2SC2878 TRANSISTOR 2SA1048 (2SA1317) Part # 076-095 076-104
Electrical Parts
Item # 1 2 3 4 5 6 Designators D3-7 D1, D2 SW1 EXT1, EXT2 J1, J5 J9, J10 Description RECTIFIER DIODE 1N4002 (1N4003,1N4004) SILICON DIODE 1N4148 SLIDE SWITCH 2P2C PH/LINE SLIDE SWITCH 2P2C PHONE JACK 6.3 PHONE JACK XLR Part # 079-027 079-003 081-027 081-004 092-078 092-113
Parts Lists - PCB2 Phono
ICs
Item # 1 Designators IC4 Description INTEGRATED CIRCUIT NJM4556L Part # 074-113
Electrical Parts
Item # 1 2 3 4 5 6 7 8 Designators D6, D13, D34 J1 SW2 SW7 VR6 VR7 VR3, VR8 VR4 Description LIGHT EMITTING DIODE (RED) 3.15 PHONE JACK 6.3 PUSH SWITCH 2P2C L=12.5 SWITCH 4P2C L=12.5 SLIDE VR 45mm L=20 CH VOL MASTER 10KA×2 SLIDE VR 30mm L=15 CUE FADER 20KBx2 ROTARY VR 16 L=20 BOOTH CUE VOL 50KAx2 ROTARY VR 16 L=20 BAL 20KMN C.C Part # 080-091 092-078 083-069 083-097 072-091 072-092 071-084 071-136
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Parts Lists - PCB3 Main
ICs
Item # 1 2 3 Designators IC2-14 IC1 IC15, IC16 Description INTEGRATED CIRCUIT NJM4558LD INTEGRATED CIRCUIT NJM2068LD INTEGRATED CIRCUIT LB1412 Part # 074-104 074-145 074-111
Electrical Parts
Item # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Designators D4, D5, D7, D9 D1-3, D6, D8, D10, D11-15 Green 2.5x5 Yellow 2.5x5 Red 2.5x5 J11 SW11 SW5, SW7, SW9, SW12 SW13-15 VR5, VR10, VR15 VR20 VR6, VR11, VR16 VR7-9, VR12-14, VR17-19, VR22-24 VR3, VR4 VR1, VR2 Description SILICON DIODE 1N4148 LIGHT EMITTING DIODE (RED) 3.15f LIGHT EMITTING DIODE (GREEN) 2.5×5 LIGHT EMITTING DIODE (YELLOW) 2.5×5 LIGHT EMITTING DIODE (RED) 2.5×5 PHONE JACK COMBINED 6.3f+XLR LEVER SW 4P3C PUSH SWITCH 2P2C L=12.5 PUSH SWITCH 4P2C L=12.5 SLIDE VR 45mm L=20 CH VOL MASTER 10KA×2 ROTARY VR 16f L=20 BOOTH CUE VOL 50KA×2 ROTARY VR 16f L=20 TONE 50KE×2 C.C Part # 079-003 080-091 080-077 080-076 080-075 092-090 082-022 083-069 083-097 072-091 071-084 071-145
ROTARY VR 16f L=20 MIC VOL 10KB ROTARY VR 16f L=20 MIC TONE 50KW C.C
071-173 071-174
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PCB3 - Main
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PCB2 - Phono
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PCB1 - Input/Output
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Schematic
R80 C37 56P R50 20K VR6A 50KAX2 R13 470 R71 33 47/16 C12 10/16 R14 10K X2 6 5 4 C8 47/16 3 2 -12V R2 470 PH X20 X21 R3 47K C5 151 IC1B 2068LD R5 8K2 C6 47/16 LN J2B C14 10/16 R17 2K2 C16 101 R18 7K5 IC4B 4558LD 10/16 R7 180 C3 822 R4 100K C2 273 C4 10/16 R6 10K 1 1 C51 56P R69 20K VR6B 50KAX2 R70 1K6 C42 R39 2K4 154 VR7B 50KEX2 R53 33K VR8B 50KEX2 C26 C31 562 C43 1 R56 5K6 R63 8K2 R76 24K R15 2K2 C13 10/16 C15 101 C68 56P R16 7K5 C56 682 IC5B 4558LD 10/16 68 2 C34 R33 33K R34 33K 3 3 3 3 SW2 R35 VR5B 10KAX2 10K R1 R36 20K C84 68 +12V SW1D TALKOVER 13 R111 1K5 R102 3K6 C79 154 VR12A 50KEX2 R92 33K VR13A 50KEX2 C63 C66 IC7A 4558LD R126 33 +12V R15 100K C81 56P R113 20K VR11B 50KAX2 R114 1K6 C72 IC7B 4558LD 10/16 R83 2K4 R91 1K5 R101 3K6 C67 154 VR12B 50KEX2 R93 33K R36 7K5 C32 101 VR13B 50KE C60 R95 33K BC1 BC2 103 C64 562 C69 68 C62 IC8B OASM 10/16 R84 33K R85 33K X6 PLUG04 R86 VR10B 10KAX2 BC3 10K R2 R87 20K SW14C SW15B SW14A SW15A D5 1N4148 VR14B 50KEX2 R100 33K C73 154 4K7 R110 L1 R99 1K5 R108 5K1 D6 LED SW4A SW10A SW4B SW10B R80 5K6 C50 68 R112 100K IC6B 2068LD -12V R236 100K +12V -12V SW7 R1 R2 R3 R4 R1 R2 R3 R4 D4 1N4148 R72 10 C57 22/16 IC6A 4558LD +12V VR6B 50KAX2 47 R105 300 L2 L3 L4 L1 L2 L3 L4 C86 22/16 10/16 R14 100K R90 33K 103 C65 562 C75 1 R96 68 2 C70 IC8A OASM 10/16 R88 33K R89 3 33K R82 R122 33 C78 22/16 R120 33 C87 22/16 VR10A 10KAX2 10K L2 R81 20K 15K 1 C52 68 C58 22/16 3 2 3 1 C88 4.7/16 R117 100K R102 20 C81 22/16 R115 20 VR14A 50KEX2 R104 33K C61 R103 4K7 154 IC9B 4558LD 10/16 R165 30K 180K IC3B 4558LD 10/16 VR6A 10KAX2 X5 X13 R124 R105 1K5 C89 10/16 C71 R107 1K6 R115 33 R32 10K 6 R27 47K C22 151 IC2A 2068LD C28 10/16 5 4 C24 47/16 R26 56 3 2 R20 470 PH X22 X23 R21 47K C21 151 IC2B 2068LD R23 8K2 R25 180 C19 822 R22 100K C18 273 -12V C20 10/16 R24 10K 1 1 X3 X7 6 5 8 7 R29 8K2 R28 100K C25 273 4 6 5 3 2 2 1 4 3 11 10 9 J3A C77 22/16 SW6 12 -12V R94 2K4 R10 30K 14 15 16 20MNX2 C24 10/16 C36 VR3B 10KAX2 C89 47/16 R11 36K R38 30K C29 68 C74 R93 100K IC5B 2068LD Q1 2SC2878 R116 7K5 C87 47 2 2 2 D6 LED 2 3 2 3 1 1 1 1 X3 X12 1 C70 47/16 154 R64 4K7 X3 6 5 8 7 R11 8K2 C11 R12 47/16 180 C10 822 R10 100K C9 273 R9 56 4 6 5 3 2 2 1 +12V R8 100K R44 1K5 R58 3K6 C38 VR9B 50KEX2 R46 33K C45 +12V D3 LED R45 1K5 R60 5K1 C88 22/16 +12V -12V SW5 R176 33 +12V R12 36K C41 22/16 X5 X9 X8 X4 10/16 4 3 R78 33 C53 22/16 IC4A 4558LD 10/16 R7 100K R42 33K 103 11 10 C7 151 IC1A 2068LD 9 C48 22/16 C30 C33 SW3 12 -12V R51 1K6 R54 2K4 R65 1K5 R59 3K6 C47 154 VR9A 50KEX2 R48 33K C27 R47 4K7 R52 33K VR8A 50KEX2 C32 562 C46 68 C44 IC5A 4558LD 10/16 R40 33K R41 C85 68 C80 22/16 154 R49 1K5 R78 1K 1K
C67 10/16
OUT
C66 10/16 C65 10/16 C64 101 SW1C TALKOVER 9 -12V R170 33 C90 10/16 IC9A 4558LD C76 R164 30K R9 180K 10/16 R62 33 +12V 20KMNX2 -12V R27 8K2 +12V R92 7K5 C73 47 R88 300 R87 150 R90 47K -12V 10 11 12 C25 10/16 IC3A 4558LD R37 30K R61 33 -12V C79 47/16 R101 910 R99 7K5 C78 47 IC5A 2068LD C77 R95 300 4.7/16 R100 100K R85 20 C71 22/16 R96 20 C76 22/16 Q2 2SC2878 R94 150 R97 47K C75 22/16 C28 68 C40 22/16 C62 10/16 R76 1K C63 101
R1 56 +12V C1
I/O PCB
J7B J7A R77 1K
VR7A 50KEX2
LOOP
IN
R8 47K J2A
R55 5K6
R57 8K2 R74 24K 33K R32 R77 33 C49 22/16 R75 33 C55 22/16 VR5A 10KAX2 10K L1 R31 20K
R125 30K
PH1
C54 682
C35
BALANCE
L
VR4B
BOOTH
VR3A 50KAX2
R98 4K7
J8B
R89 910
BOOTH
L1
R43 33K
103
C72 22/16
MONO/STEREO
4.7/16
R VR4A
R91 4K7
R19 56 +12V
R106 20K VR11A 50KAX2
R120 910
IC6A 2068LD R111 300
R30 470
C17 47/16
R110 150
C85 22/16
5K6 R98 8K2 R119 24K C82 682
C86 22/16
Q4 2SC2878
R113 47K
PH2
C27 47/16
R68 R79 10 R66 15K
MASTER
-12V +12V -12V
R31 180
R114 4K7
J8C
C26 822
MASTER
C82 47/16 R109 910 R108 7K5 C83
+12V
C80 R104 150 22/16
LN J3B C30 10/16
C23 47/16 R35 2K2
C84 4.7/16
R106 47K
R97
R73 15K R67
Q3 2SC2878
5K6 R109 8K2 R121 24K C83 682
L2
R33 2K2 C29 10/16
X11 PLUG02 IC6B 4558LD
15K
R107 4K7
R34 7K5 BC4
R129 10K IC8A 4558LD R132 300 C92 22/16 R130 20 C95 22/16 Q7 2SC2878 R127 47K C96 22/16
C31 101 C100 56P
R119 R160 1K5 R155 3K6 C111 154 VR17A 50KEX2 R138 33K VR18A 50KEX2 C95 C98 IC11A 4558LD R180 33 +12V R112 100K C115 56P R140 1K5 R154 3K6 C101 R168 1K6 C103 IC11B 4558LD 10/16 R133 2K4 154 VR17B 50KEX2 R149 33K C96 562 R152 5K6 R158 R139 33K C91 103 8K2 R173 24K C119 682 IC12B 4558LD C104 68 C99 10/16 R129 33K R130 33K C120 22/16 R131 VR15B 10KAX2 10K R3 R132 20K +12V R235 100K C112 68 3 4 R157 5K6 5 1 SW7C 3 SW7B 2 4558LD R177 33 D7 1N4148 -12V 2 4 R42 10K 10/16 X12 1 X12 5 SW7A VR7A 20KBx2 R50 47K C37 47/16 R53 47K C31 1/16 IC4B 4556 VR8A 50KAX2 VR19B 50KEX2 R142 33K C108 154 R159K7 4 R141 1K5 R156 5K1 D8 LED C102 10/16 R137 68K R179 33 IC10A -12V LED +12V -12V SW9 C94 68 +12V C107 22/16 D13 R52 4K7 -12V C36 47/16 R45 180 C93 R51 10K R37 R48 47K C35 1/16 -12V 10 470/16 IC4A R33 47 4556 R47 100K +12V R38 10 C32 22 R41 180 R39 16K C30 470/16 C28 C26 472 R32 47 472 2 GRD PHONE 3 2 3 X11 1 X1 1 J1 R40 16K C29 C116 22/16 10/16 R21 100K R136 33K 103 C97 562 R151 5K6 R153 8K2 R171 24K C117 682 IC12A 4558LD C110 68 C105 10/16 R134 33K R135 33K SW4C R128 R174 33 C113 22/16 R172 33 C118 22/16 VR15A 10KAX2 10K L3 R127 20K F OR BITCOUNTER SW10C X8 VR19A 50KEX2 R144 33K C92 154 R1434K7 R145 1K5 BC1 BC2 BC3 BC4 SW15C b D2 SW14B c a D15 b X7 3 LED LED 2 1 -12V +12V 10K
R131 150
J9
R37 56 +12V
R147 20K VR16A 50KAX2 R148 1K6 R16933 C44 R50 10K X4 6 5 4 C40 47/16 R45 56 2 -12V 2 1 2 1 1 3 X9 6 5 8 7 4 6 5 3 4 3 11 10 C109 22/16 9 SW8 12 -12V R150 2K4
R118 20
R128 4K7
Balanced Outs
R46 470
C34 47/16
+12V R125 10K R103 10K
-12V C90 22/16 R124 R123 Q5 2SC2878 150 R122 47K
J10
R44 47K J4A
C39 151
IC3A 2068LD
10/16
IC8B 4558LD
300
R48 36K
R47 470K C41 822
PH3/L3
C43 22/16
R49 820
C42 222
R126 4K7 Q6 2SA1317 R133 1K R121 680K C33 22 D1 1N4148 C93 220/16 +12V R83 X4 X11 1 2 3 C68 10/16 X19 2 1 X10 2 1 R79 200K R81 200K R84 47K C69 10/16 10K 47K R86 1 2 3 D2 1N4148 C91 4.7/16
SW1A R38 470 C37 151 R41 47K R39 36K C35 222 IC3B 2068LD R40 470K C33 822
C36 10/16
R42 10K
R167 20K VR16B 50KAX2
C38 22/16 C46 10/16 J4B R53 2K2
R43 820
VR18B 50KEX2
RECORD
J8A
SW1B
PHONES
R54 C48 101 7K5
R82 10K
L4
R52 7K5 R51 C45 10/16 2K2 C47 101 C106 10/16 6
R43 10K
R163 68K D9 1N4148
R49 10K SW7D
VR7B 20KBx2 R54 47K
VR8B 50KAX2
R44 100K
C50 101
C114 7 10/16
5 X18 C102 103 +12V 3 2 D3 1N4002 D6 1N4002 1 154 VR22A 50KEX2 R197 33K VR23A 50KEX2 C128 562 R201 5K6 C129 R203 R193 33K C135 22/16 -12V +12V R117 100K R194 1K5 C130 154 VR22B 50KEX2 R198 33K C131 IC13B 4558LD 10/16 R200 33K 1 C16 101 R30 100 -12V 2 3 4 R4 L4 VR23B 50KEX2 C127 562 R202 5K6 C123 R211 103 8K2 R223 24K C143 682 IC14B 4558LD C132 68 C133 10/16 R187 33K R188 33K R225 R224 150K 150K R4 SW13 1 2 3 4 5 6 4.7/16 22/16 2 3 2 C11 3 22/16 R24 1K 1% IC1A C12 2068LD 22/16 R28 30K 1% C23 101 C17 100/16 C18 101 X37 3 1 1 2 3 C13 22/16 R20 1K 1% IC1B 2068LD +12V R23 100 VR3 10KB R4 1K2 R18 4K7 C21 100/16 D11 LED C14 33 C19 100/16 -12V R26 33 7 8 9 R4 L4 2 4 10 11 12 R D13 LED a LB1412 C147 R19 30K 1% C8 1 1 R22 1K 1% C150 1/16 R229 82K R233 1M C152 22/16 C151 4.7/16 R232 5K6 R206 3K6 VR24B 50KEX2 R205 33K C134 154 R2124K7 R186 2K4 1M R183 20K R190 20K 1/16 R204 1K5 R210 +12V D10 LED 5K1 4.7/16 IC15 -12V 6 LB1412 13 15 12 10 14 9 8 7 11 1 21 20 19 18 17 16 5 4 3 2 1 2 3 4 5 6 2K2X5 RP1 LEDBAR1 22 SW110-220 TR05 1 1 AC 2 C149 +12V -12V SW12 R231 82K 8 7 11 1 LB1412 5 4 3 2 R217 33 103 8K2 R219 24K C142 682 IC14A 4558LD C136 IC16 68 C139 10/16 R191 33K R192 33K R184 L4 13 3 R64 2K2 C54 10/16 R65 47K C55 101 3 15 R67 12K VR21B 50KBX2 C60 10/16 J6B R72 47K R74 2K2 C61 101 R75 12K 2 3 1 X7 X16 1 R234 20K R230 20K R216 2 3 R215 3K9 C140 56 16 14 R214 33K C141 22/16 R222 R116 100K 33 R221 33 C137 22/16 R220 33 C144 22/16 VR20A 10KAX2 10K C148 -12V C146 22/16 C145 4.7/16 R227 5K6 6 LB1412 13 15 12 10 14 9 21 20 19 18 17 16 1 2 3 4 5 6 2K2X5 GND RP2 C312 103 3 FU1 0.5A AC POWER SW 1 1 D7 1N4002 X51 X16 2 C101 100/25 2 X17 1 -12V T1 3 2 2 X50 3 X15 2 Vin IC9 7912 LEDBAR2 22 CAP S4 154 R208 4K7 C117 D4 1N4002 D5 1N4002 C98 1000/25 C97 1/16 C99 1000/25 IC7 7812 Vin GND +12V 3 C94 1/16 1 IC10 7805 Vin GND +5V 3 X17 3 2 1 +12V R61 5K1 1% R57 56 VR24A 50KEX2 R209 33K C124 IC10B 4558LD
C51 47/16 X5 R58 R55 5K6 1K R56 1K 2 3 1 X15 1 2 5 C121 3 7 8 6 10/16 1 3 4 SW11 C122 2 10/16
R213 R185 33K VR21A 50KBX2 1K5
R207 3K6 C138
R218 1K5
J5
R60 1K 1%
-12V C49 IC4A 2068LD R62 56 47/16
MIC 3
R59 1K 1% C53 101 R63 5K1 1%
R195 3K9 R199 2K4
+5V
1
+5V
MIC 3
MIC 3
C126 56
C103 1/16 X14
X18 9 8 7
2
+12V
R196 1M IC13A C125 10/16
2
J6A
R68 2K2 R66 47K C56 101
R69 12K
9 1 2 1 11 10 4558LD 2 12
GND
C57 10/16
C52 47/16
X6
X14
C100 103
GND
1
-12V
3
6
L5
L5
L5
+12V
POWER
5 4
+12V
-12V
2 1
-12V
AC 220/110 V
L6
L6
L6
LIGHT
R70 C58 10/16 R71 47K 2K2 C59 101
R73 12K
R189 VR20B 10KAX2 10K
X1 J1
X1
MIC2
MIC2
C15 47/16 C2 472 R1 6K8 VR1 50KW C6 472 C10 221 1 C1 3 22/16 R2 47K 4
SW1A TALKOVER PGM D14 LED
1
X2
C20 22/16
R29 1K 1%
R25 30K 1% C5 22/16
IC2A 4558LD
C7 10/16
2 CUE D12 LED
MIC1
2 T R S J11 3
2
C22 100/16
R27 33
R3 9K1 C3 R6 10K 393 VR2 50KW +12V LED 4K3 393 C4 R17 10K IC2B 4558LD 5 7 8 D1 6 SW1B TALKOVER R16 c -12V
MIC1
R13 30K 1%
C9 101
VR4 10KB
R5 1K2
+12V
L