Gemini BPM-500 User manual

Page 1
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 2
1
2 3
4
5
6
7
24
8
9
10
11
12
20
13
20
15
8
9
10
11
14
20
8
9
10
11
16
20
8
9
10
11
18
17 19
26
27
32
33
36
34
35 42
41
43
39
40
31
38
37
30
29
28
23
22
21
25

Page 3
44
45 45
46
46
47
47
48
48
49
49
50 50
51 51
52
52
54 54
55
55
56 58 61
57
57
59 59
64
60
60
62 62
53 63
65

Page 4
Connections
1. Before plugging in the power cord, make sure that the VOLTAGE
SELECTOR (44) switch is set to the correct voltage.
NONO
NONO
NOTETE
TETE
TE: 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.
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.
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.
NONO
NONO
NOTETE
TETE
TE: 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.

Page 5
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.
NONO
NONO
NOTETE
TETE
TE: 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.
NONO
NONO
NOTETE
TETE
TE: If the diffence between the two channel’s beats
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.
NONO
NONO
NOTETE
TETE
TE: 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.
NONO
NONO
NOTETE
TETE
TE: The RECORD OUT (48)RECORD OUT (48)
RECORD OUT (48)RECORD OUT (48)
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.
NONO
NONO
NOTETE
TETE
TE: When the DISPLADISPLA
DISPLADISPLA
DISPLAY (31)Y (31)
Y (31)Y (31)
Y (31) is in the cue/program mode,
by adjusting GAIN (8)GAIN (8)
GAIN (8)GAIN (8)
GAIN (8), you can increase or decrease the
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

Page 6
Description Part #
Cabinet Parts and Packing
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
Item #
Parts Lists
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
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)
162-940
262-019
262-022
262-020
262-021
262-023
162-955
162-979
162-980
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)
Description Part #
Printed Circuit Boards
Item #
1
2
3
4
5
6
7
8
9

Page 7
Parts Lists - PCB1 Input/Output
079-027
079-003
081-027
081-004
092-078
092-113
RECTIFIER DIODE 1N4002 (1N4003,1N4004)
SILICON DIODE 1N4148
SLIDE SWITCH 2P2C PH/LINE
SLIDE SWITCH 2P2C
PHONE JACK 6.3
PHONE JACK XLR
D3-7
D1, D2
SW1
EXT1, EXT2
J1, J5
J9, J10
Designators Description Part #
Electrical Parts
Item #
1
2
3
4
5
6
076-095
076-104
TRANSISTOR 2SC2878
TRANSISTOR 2SA1048 (2SA1317)
Q1-5, Q7
Q6
Designators Description Part #
Transistors
Item #
1
2
074-113
074-145
074-107
074-074
INTEGRATED CIRCUIT NJM4556L
INTEGRATED CIRCUIT NJM2068LD
INTEGRATED CIRCUIT NJM7812FA
INTEGRATED CIRCUIT NJM7805FA
IC8
IC1-6
IC7
IC10
Designators Description Part #
ICs
Item #
1
2
3
4
Parts Lists - PCB2 Phono
080-091
092-078
083-069
083-097
072-091
072-092
071-084
071-136
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
D6, D13, D34
J1
SW2
SW7
VR6
VR7
VR3, VR8
VR4
Designators Description Part #
Electrical Parts
Item #
1
2
3
4
5
6
7
8
074-113INTEGRATED CIRCUIT NJM4556LIC4
Designators Description Part #
ICs
Item #
1

Page 8
Parts Lists - PCB3 Main
079-003
080-091
080-077
080-076
080-075
092-090
082-022
083-069
083-097
072-091
071-084
071-145
071-173
071-174
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
ROTARY VR 16f L=20 MIC VOL 10KB
ROTARY VR 16f L=20 MIC TONE 50KW C.C
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
Designators Description Part #
Electrical Parts
Item #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
074-104
074-145
074-111
INTEGRATED CIRCUIT NJM4558LD
INTEGRATED CIRCUIT NJM2068LD
INTEGRATED CIRCUIT LB1412
IC2-14
IC1
IC15, IC16
Designators Description Part #
ICs
Item #
1
2
3

PCB3 - Main
Page 9

PCB2 - Phono
Page 10

PCB1 - Input/Output
Page 11

IC4A
4556
IC4B
4556
R37
10
R38
10
C29
470/16
C30
470/16
R40
16K
R39
16K
C33
22
C32
22
R45
180
R41
180
C36
47/16
C37
47/16
R47
100K
R44
100K
VR8A
50KAX2
VR8B
50KAX2
C35
1/16
C31
1/16
R48
47K
R50
47K
R53
47K
R54
47K
VR7A
20KBx2
VR7B
20KBx2
1
2
3
X11
R33
47
R32
47
C28 472
C26
472 GRD PHONE
R52
4K7
D13
LED
R51
10K
R49
10K
+12V
-12V
-12V
SW7A
SW7B
SW7C
SW7D
LVR4B
20KMNX2
RVR4A
20MNX2
VR3A
50KAX2
VR3B
10KAX2
1
2
3
X31
2
3
X4
BALANCE BOOTH
VR6A
10KAX2
VR6B
50KAX2
1
2
3
X5
MASTER
R27
8K2
D6
LED
+12V
-12V
SW2
MONO/STEREO
1
2
3
4
5
X12
R42
10K
R43
10K
IC3A
2068LD
R47
470K
R48
36K
R44
47K
R46
470
R49
820
C39
151
+12V
-12V
C42
222 C41 822
C43
22/16
IC3B
2068LD
R40
470K
R39
36K
R41
47K
R38
470
R43
820
C37
151
C35
222 C33 822
C38
22/16
C44
10/16
C36
10/16 R42
10K
R50
10K
R37
56
R45
56
C34
47/16
C40
47/16
PH3/L3
J4A
1
2
3
4
5
6
X4
R68
2K2
C57
10/16
C56
101
L5
J6A
R66
47K
R69
12K
R64
2K2
C54
10/16 C55
101
R65
47K
R67
12K
IC4A
2068LD
R60
1K 1%
R59
1K 1% R63
5K1 1%
C53
101
J5
R57
56
R62
56
C51
47/16
C52
47/16
+12V
-12V
R61
5K1 1%
C50
101
C49
47/16 R55
5K6 R56
1K
R58
1K
MIC 3
R53
2K2
C46
10/16
C48
101
L4
J4B R54
7K5
R51
2K2
C45
10/16 C47
101
R52
7K5
1
2
3
X5
IC5A
2068LD
IC5B
2068LD
C77
4.7/16
C74
4.7/16
R92
7K5
R85
20 R96 20
R99
7K5
C71
22/16 C76
22/16
+12V -12V J8B
RECORD
C79
47/16
C70
47/16
R101
910
R89
910
R95
300 R94 150
R97
47K
C75
22/16
Q2
2SC2878
R88
300 R87
150
R90
47K
C72
22/16
Q1
2SC2878
BOOTH
IC6A
2068LD
IC6B
2068LD
C88
4.7/16
C84
4.7/16
R108
7K5
R102
20 R115 20
R116
7K5
C81
22/16 C86
22/16
+12V -12V J8C
C89
47/16
C82
47/16
R120
910
R109
910
R111
300
R110
150
R113
47K
C85
22/16
Q4
2SC2878
R105
300 R104
150 R106
47K
C80
22/16
Q3
2SC2878
MASTER
R114
4K7
R107
4K7
R98
4K7
R91
4K7
Q6
2SA1317
R121
680K
C93
220/16
D1
1N4148
C91
4.7/16
D2
1N4148
+12V
R86
10K
R82
10K
C69
10/16
C68
10/16
J8A
1
2
3
X11
1
2
3
X12
R74
2K2
C60
10/16
C61
101
L6
J6B
R72
47K
R75
12K
R70
2K2
C58
10/16 C59
101
R71
47K
R73
12K
1
2
3
X6
1
2
3
X7
J1 1
2
3
X1
R83
47K
R84
47K
J7B
J7A
R77
1K
R76
1K
C64
101
C63
101
C65
10/16
C62
10/16
1
2
3
X8
IC8A
4558LD
IC8B
4558LD
R125
10K
R130
20 R118
20
R129
10K
C92
22/16
C95
22/16
+12V -12V
R119
10K R132
300
R123
150
R122
47K
C90
22/16
Q5
2SC2878
R124
300
R131
150
R127
47K
C96
22/16
Q7
2SC2878
R103
10K
J9
J10
R128
4K7
R126
4K7
Balanced
Outs
R81
200K
R79
200K
LOOP
1
2
3
X13
1
2
3
X9
OUT
IN
R112
100K
R117
100K
R93
100K
R100
100K
C78
47
C73
47
C87 47
C83
47
SW1B
SW1A
1
2
X10
MIC2
C67
10/16
C66
10/16
R80
1K
R78
1K
1
2
3
X4
1
2
X19
1
2
3
4
5
6
7
8
9
X18
+12V
-12V
L5
MIC 3
L6
1
2
3
X17
+5V
+12V
1
3
2
T
R
S
J11
MIC1
1
2
3
X37
J1
1
2
3
X1 PHONES
I/O PCB
R133
1K
1
2
3
X7
-12V
+12V
IC1A
2068LD
R10
100K
R11
8K2
R8
47K
R13
470
R17
2K2
R12
180
C7
151
+12V
-12V
C10
822 C9 273
C11
47/16
IC1B
2068LD
R4
100K
R5
8K2
R3
47K
R2
470
R7
180
C5
151
C3
822 C2 273
C6
47/16
C14
10/16
C16
101
C12
10/16
C4
10/16 R6
10K
R14
10K
R1
56
R9
56
C1
47/16
C8
47/16
PH1
L1
J2A
J2B
1
2
3
4
5
6
X2
R18
7K5
R15
2K2
C13
10/16 C15
101
R16
7K5
IC2A
2068LD
R28
100K
R29
8K2
R27
47K
R30
470
R35
2K2
R31
180
C22
151
+12V
-12V
C26
822 C25 273
C27
47/16
IC2B
2068LD
R22
100K
R23
8K2
R21
47K
R20
470
R25
180
C21
151
C19
822 C18 273C23
47/16
C30
10/16
C32
101
C28
10/16
C20
10/16 R24
10K
R32
10K
R19
56
R26
56
C17
47/16
C24
47/16PH2
L2
J3A
J3B
1
2
3
4
5
6
X3
R36
7K5
R33
2K2
C29
10/16 C31 101
R34
7K5
PH2
PH
PH
LN
X21X20
LN
X23X22
21
3
4
6
5
7
9
8
10
12
11
SW3
1
2
3
4
5
6
X3
IC4B
4558LD
R70
1K6
VR6B
50KAX2
C51 56P
R51
1K6
VR6A
50KAX2
C37
56P
R78
33
C53
22/16
C48
22/16
IC4A
4558LD
+12V
R71 33 -12V
1
2
3
X15
1
2
3
X14
1
2
3
X16
C30
10/16
C42
10/16
R50
20K
R69
20K
21
3
4
6
5
7
9
8
10
12
11
SW6
1
2
3
4
5
6
X7
IC7B
4558LD
R114
1K6
VR11B
50KAX2
C81 56P
R107
1K6
VR11A
50KAX2
C68
56P
R126
33
C86
22/16
C77
22/16
IC7A
4558LD
+12V
R115 33 -12V
C63
10/16
C72
10/16
R106
20K
R113
20K
21
3
4
6
5
7
9
8
10
12
11
SW8
1
2
3
4
5
6
X9
IC11B
4558LD
R168
1K6
VR16B
50KAX2
C11556P
R148
1K6
VR16A
50KAX2
C100
56P
R180
33
C116
22/16
C109
22/16
IC11A
4558LD
+12V
R16933 -12V
C95
10/16
C103
10/16
R147
20K
R167
20K
R59
3K6 R48
33K
R49
1K5
R47
4K7
R52
33K
R54
2K4
R65
1K5
R75
33
R42
33K
R55
5K6
R57
8K2 R74
24K
R77
33
C46
68
C47
154
C27
154
C32
562
C54
682
C33
103
VR9A
50KEX2
VR7A
50KEX2
VR8A
50KEX2
IC5A
4558LD
C49
22/16 C55 22/16
+12V -12V
R58
3K6 R46
33K
R45
1K5
R64 4K7
R53
33K
R39
2K4
R44
1K5
R43
33K
R56
5K6
R63
8K2
R76
24K
C43
68
C38
154
C45
154
C31
562
C56
682
C26
103
VR9B
50KEX2
VR7B
50KEX2
VR8B
50KEX2
IC5B
4558LD
R102
3K6 R104
33K
R105
1K5
R103
4K7
R92
33K
R94
2K4
R111
1K5
R120
33
R90
33K
R96
5K6
R98
8K2
R119
24K
R122
33
C75
68
C79
154
C61
154
C65
562
C82
682
C66
103
VR14A
50KEX2
VR12A
50KEX2
VR13A
50KEX2
IC8A
OASM
C78
22/16 C87 22/16
+12V -12V
R101
3K6 R100
33K
R99
1K5
R110
4K7
R93
33K
R83
2K4
R91
1K5
R95
33K
R97
5K6
R109
8K2
R121
24K
C69
68
C67
154
C73
154
C64
562
C83
682
C60
103
VR14B
50KEX2
VR12B
50KEX2
VR13B
50KE
IC8B
OASM
R155
3K6 R144
33K
R145
1K5
R1434K7
R138
33K
R150
2K4
R160
1K5
R172
33
R136
33K
R151
5K6
R153
8K2
R171
24K
R174
33
C110
68
C111
154
C92
154
C97
562
C117
682
C98
103
VR19A
50KEX2
VR17A
50KEX2
VR18A
50KEX2
IC12A
4558LD
C113
22/16 C118 22/16
+12V -12V
R154
3K6 R142
33K
R141
1K5
R1594K7
R149
33K
R133
2K4
R140
1K5
R139
33K
R152
5K6
R158
8K2
R173
24K
C104
68
C101
154
C108
154
C96
562
C119
682
C91
103
VR19B
50KEX2
VR17B
50KEX2
VR18B
50KEX2
IC12B
4558LD
C125
10/16
C131
10/16
R207
3K6 R209
33K
R218
1K5
R208 4K7
R197
33K
R199
2K4
R213
1K5
R220
33
R193
33K
R201
5K6
R203
8K2 R219
24K
R221
33
C136
68
C138
154
C124
154
C128
562
C142
682
C129
103
VR24A
50KEX2
VR22A
50KEX2
VR23A
50KEX2
IC14A
4558LD
C137
22/16 C144 22/16
+12V -12V
R206
3K6 R205
33K
R204
1K5
R2124K7
R198
33K
R186
2K4
R194
1K5
R200
33K
R202
5K6
R211
8K2
C132
68
C130
154
C134
154
C127
562
C143
682
C123
103
VR24B
50KEX2
VR22B
50KEX2
VR23B
50KEX2
IC14B
4558LD
IC1A
2068LD
R28
30K 1%
R24
1K 1%
C23
101
R22
1K 1%
C8
22/16
C12
22/16 R4
1K2
C11
22/16
+12V
R23
100
C17
100/16
R30
100
C19
100/16
R19 30K 1%
C16
101
IC1B
2068LD
R13
30K 1%
R20
1K 1%
C9
101
R29
1K 1%
C20
22/16
C5
22/16
R5
1K2
C13
22/16
R25
30K 1%
C18
101
VR3
10KB
VR4
10KB
C15
47/16
IC2A
4558LD
IC2B
4558LD
R18
4K7
C14
33
C7
10/16
R26
33
R27
33
C21
100/16
C22
100/16
-12V
+12V
VR2
50KW
VR1
50KW
C3
393
C4
393
R6
10K
R17
10K
C2
472
C6
472
R3
9K1
R1
6K8
C10
221
1
2
3
X1
MIC2
-12V
1
2
3
X2
MIC1
C1
22/16
VR5A
10KAX2
VR5B
10KAX2
VR10A
10KAX2
VR10B
10KAX2
VR15A
10KAX2
VR15B
10KAX2
IC9A
4558LD
R125
30K
C85
68
R170
33
C80
22/16
-12V
R164
30K
R176
33
C88
22/16
+12V
IC9B
4558LD
R124
30K
C84
68
R165
30K
C89
10/16
C90
10/16
IC10A
4558LD
R137
68K
C94
68
R179
33
C107
22/16
-12V
R177
33
C120
22/16
+12V
5
67
IC10B
4558LD
R163
68K
C112
68
C106
10/16
C102
10/16
R40
33K
R41
33K
R33
33K
R34
33K
R32
10K
R31
20K
R35
10K
R36
20K
R88
33K
R89
33K
R84
33K
R85
33K
R82
10K
R81
20K
R86
10K
R87
20K
R134
33K
R135
33K
R129
33K
R130
33K
R128
10K
R127
20K
R131
10K
R132
20K
R191
33K
R192
33K
R187
33K
R188
33K
R184
10K
R189
10K
SW12
R210
5K1
D10
LED
+12V
IC13B
4558LD
R215
3K9
VR21B
50KBX2
R216
1M
C140 56
IC13A
4558LD
R195
3K9
VR21A
50KBX2
R196
1M
C12656
R185
33K
R214
33K
C135
22/16
C141
22/16 R222
33 R217 33
+12V -12V
VR20A
10KAX2
VR20B
10KAX2
L1
R1
L2
L3
L4
R2
R3
R4
C114
10/16
C93
10/16
R11
36K
R12
36K
R9
180K
R10
180K
IC3A
4558LD
R37
30K
C28
68
R61
33
C40
22/16
-12V
R62
33
C41
22/16
+12V
IC3B
4558LD
R38
30K
C29
68
C24
10/16
C25
10/16 C35
10/16
C36
10/16
IC6A
4558LD
R68
15K
C52
68
R79
10
C58
22/16
-12V
R72
10
C57
22/16
+12V
IC6B
4558LD
R73
15K
C50
68
R66
15K
R67
15K
D4
1N4148
D5
1N4148
D7
1N4148
D9
1N4148
2
4
3
1
SW1A
TALKOVER
R2
47K
1 2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
LB1412
IC16
LB1412
1
2
3
4
5
6
RP2
2K2X5
LEDBAR2
1 2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
LB1412
IC15
LB1412
1
2
3
4
5
6
RP1
2K2X5
LEDBAR1
-12V
R227
5K6
C145
4.7/16
C148
1/16
R231
82K
C149
4.7/16
-12V
R232
5K6
C151
4.7/16
C150
1/16
R229
82K
C147
4.7/16
C152
22/16
R233
1M
C146
22/16
6
8
7
5
SW1B
TALKOVER
R16
4K3
+12V c
D1
LED
10
12
11
9
SW1C
TALKOVER
14
16
15
13
SW1D
TALKOVER
SW9
R156
5K1
D8
LED
+12V
SW7
R108
5K1
D6
LED
+12V
SW5
R60
5K1
D3
LED
+12V
2
1
3
4
65
7
98
10
12 11
SW13
D12
LED
a
-12V
D13
LED
D14
LED
D11
LED
LRCUE PGM
R224
150K
R225
150K
1
2
3
X5
C44
10/16
C34
10/16
C70
10/16
C62
10/16
C105
10/16
C99
10/16
C76
10/16
C71
10/16
R223
24K
1
2
3
4
5
X12
L1 L2 L3 L4 L1 L2 L3 L4
R1 R2 R3 R4 R1 R2 R3 R4
C139
10/16
C133
10/16
2
1
3
4
6
5
7
8
10
9
11
12
14
13
15
16
SW11
13
L5
MIC 3
L6
R80
5K6
R157
5K6
C122
10/16
C121
10/16
SW4A SW4BSW10A SW10B
R7
100K
R8
100K
R14
100K
R15
100K
R21
100K
R112
100K
R116
100K
R117
100K
BC1 BC2
BC3
BC4
SW4C SW10C
BC1 BC2 BC3 BC4
X8
SW15B SW15A
SW15C
SW14C SW14A
SW14B
D2
LED
D15
LED
b a
cb
R236
100K
R235
100K
-12V
-12V
R183
20K R190 20K
1 2 3 4 R4L4
R230
20K
R234
20K
L4 R4 2 4
X6
PLUG04 X11
PLUG02
F
OR
BITCOUNTER
D7
1N4002
C101
100/25
D3
1N4002
D4
1N4002 D5 1N4002
D6
1N4002
C99
1000/25
C98
1000/25
1
2X17
C100
103
C102
103
C94
1/16
C97
1/16
+12V
-12V
X14
-12V
+12V
GND
Vin
1
GND
2
+12V 3
IC7
7812
Vin
2
GND 1
-12V 3
IC9
7912
1
2
3
X15
LIGHT
POWER
1
2
X16
C103
1/16
1
2
3
X18
Vin
1
GND
2
+5V 3
IC10
7805 +5V
SW110-220
FU1
0.5A
POWER SW
AC 220/110 V
C312
103
T1
TR05
1
2
3
X50
1
2
X51
S4
C117
CAP
AC
AC
GND
Schematic