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SERVICE MANUAL
BPM-250
Stereo Preamp Mixer
CONTENT'S:
Connections & Operations:.......................................................Page 2-5 Specifications:..............................................................................Page 5 Parts Lists:....................................................................................Page 5 PCBs:..........................................................................................Page 6-7 Schematics....................................................................................Page 8
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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3
5 28 27 1 2
6
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6
7
7
7
16
8
8
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17
9
9
9 18 21 21 21 20
10 19
11
12
29 22
13
14
15
25 23 26 24 4
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GROUND LIFT
30 38
LIFT
37 35 34 33 32 31 36
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38
39
40
38
39
40
34
33
32
31
36
Connections
1. Before plugging in the power cord, make sure that the VOLTAGE SELECTOR (30) switch is set to the correct voltage. NOTE: NOTE This product is double insulated and not intended to be grounded. 2. Make sure that the POWER (1) switch is in the off position. The POWER LED (2) will be off. 3. The BPM-250 is supplied with 3 sets of output jacks. The MASTER OUTPUT (38) jacks are used to connect to your main amplifier. The OUTPUT REC (40) jacks can be used to connect the mixer to the record input of your recorder enabling you to record your mix. The OUTPUT BOOTH (39) jacks allow you to hook up an additional amplifier. 4. The DJ MIC (3) input (found on the front panel) accepts a 1/4" or XLR connector and accepts only unbalanced microphones. 5. On the rear panel are 2 stereo PHONO (32, 34) inputs, 2 stereo LINE (31, 33) inputs and 1 stereo PHONO/LINE (36) input. The PHONO/LINE (35) switch enables you to set the (36) input to Phono or Line. The phono inputs will accept only turntables with a magnetic cartridge. A GROUND (37) screw 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 (4) jack. 7. The BPM-250 comes with a front panel BNC LIGHT (5) jack. This jack is for use with a gooseneck light like the Gemini GNL-700.
SUGGESTION: You can use the Cut Features on each channel to remove Low, Mid and/or High to create special effects. 4. CROSSFADER SECTION: The CROSSFADER (26) allows the mixing of one source into another. The left side of the CROSSFADER (26) is channel 2 and the right side is channel 3. 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 (38) in the left position). 2. Then turn the power off before moving the GROUND LIFT SWITCH (38). 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.
5. BPM DISPLAY: There are BPM DISPLAYS (23, 24) for Channel 2 and Channel 3. They update approximately every beat and digitally display the Beats Per Minute allowing you to match the beats visually. BPM DISPLAY (23) reflects the Beats Per Minute of Channel 2, and BPM DISPLAY (24) reflects the Beats Per Minute of Channel 3. 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. 6. The BEAT OFFSET INDICATORS (25) light when the tracks of Channel 2 and Channel 3 are within 11 BPMs of each other and display how aligned the beats for Channel 2 and Channel 3 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: NOTE 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. NOTE: 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. 7. OUTPUT CONTROL SECTION: The level of the MASTER OUT (38) is controlled by the MASTER (18) control. The BALANCE (17) control will allow the Amp Out signal to be balanced between the left and right speakers. The BOOTH (16) control adjusts the level of the BOOTH OUTPUT (39). 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.
Operation
1. POWER ON: Once you have made all the equipment connections to your mixer, press the POWER SWITCH (1). The power will turn on and the POWER LED (2) will glow RED. 2. CHANNEL 1: The GAIN (6), HIGH (7), MID (8), and LOW (9), controls allows you to fully adjust the selected source. Switch # (10) allows you to select either the DJ MIC (3) or the PHONO/LINE (36) input. The CHANNEL (13) slide controls the output level of this channel. 3. MAIN CHANNEL SECTION: To assign an input source to a channel, first set the PHONO/LINE (11,12) switches to their appropriate positions. To make the proper adjustments to your music, set the GAIN (6), HIGH (7), MID (8) and LOW (9) controls and position the CHANNEL (14, 15) slide. NOTE TE: NOTE There is Low, Mid and High equalization for each channel with an extremely wide range of adjustment giving you a smoother mix.
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NOTE: NOTE The RECORD OUT (40) 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 bass, treble and mid controls of that same channel. 8. 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. When the TALKOVER (19) button is pushed, the TALKOVER INDICATOR will glow and the volume of all sources except the Mic or whatever is connected to the PHONO/LINE (36) input are reduced by -16 dB. 9. CUE SECTION: By connecting a set of headphones to the HEADPHONE (4) jack, you can monitor any or all of the channels. Select the correct CUE (21) button or buttons and their respective CUE LED (29) indicators will glow. Use the CUE LEVEL (20) control to adjust the headphone volume without effecting the overall mix. By sliding the CUE PGM PAN (22) control to the left you will be able to monitor the assigned cue signal. Sliding to the right will monitor the PGM (program) output. 10. DISPLAY: The peak hold, dual function DISPLAY (27) indicates either the MASTER (38) output left and right levels or the channel 2 and channel 3 levels. You can choose the option you want by pressing the DISPLAY (28) button. NOTE TE: DISPLAY NOTE When the DISPLAY (27) is in the channel 2/ channel 3 display mode, by adjusting the individual channel gain and tone controls, you can increase or decrease the signal to match the other channel's signal. The channel slides and crossfader have no effect on the display readings.
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 45 Description PANEL CONTROL BRACKET VR PANEL REAR COVER BOTTOM HOLDER X-FADER SWING LEVEL (LONG) KNOB PUSH (SMALL) BUSHING FOR KNOB (SMALL) KNOB SLIDE (BIG) KNOB SLIDE (SMALL) KNOB ROTARY (B) KNOB INLAY (BLACK); BOOTH,BAL,MASTER,CUE KNOB INLAY (RED); GAIN KNOB INLAY (GRAY); HIGH,MID,LOW VR INLAY PLATE LED PLATE DISPLAY (SMALL) HOLDER LED HOLDER BUSHING LED HOLDER LED 3f (17mm) HOLDER LED 3f (7mm) PROTECTOR PLATE FOR 115/230V SWITCH PAD FOOT GND SCREW VR DUST PROOF CLOTH (SMALL) VR DUST PROOF CLOTH SWING DUST PROOF CLOTH BNC DUST PROOF CLOTH PCB SUPPORT SCREEN SPACER EVA PAD SNAP RIVET DRYER PAN-HEAD MACHINE SCREW; PMS 2X4(B) 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) BAND-HEAD TAPPING SCREW/TWIN SCREW; BTS-2 3X8(AB) TWIN FLAT-HEAD TAPPING SCREW; FTS-3 3X6(AB) FLAT-HEAD TAPPING SCREW; FTS-3 3X12(AB) NUT/WASHER 3mm BAND-HEAD MACHINE SCREW; BMS 3X2X4 Part # 002-194A 021-758B 021-969B 032-019 022-360 023-674 002-531 002-532 002-713 002-714 003-131 148-236 148-238 148-239 003-970 003-362 003-372 003-989A 003-993 003-969 003-711 022-305 049-206 146-710 159-167 159-171 159-216 159-201 047-468 046-024 003-548 003-510 003-612 190-062 102-007 102-025 121-003A 111-051A 111-046A 111-044A 110-172A 111-043A 111-049A 131-081 107-015
Specifications
INPUTS: DJ Mic....................................................1.5mV 2Kohm unbalanced Phono.........................................................................3mV 47Kohm Line.......................................................................150 mV 27Kohm OUTPUTS: Amp/Booth......................................................0 dB 775mV 400ohm Max..............................24V Peak to Peak Rec...........................................................................225mV 5Kohm GENERAL: Low...........................................................................+ 12/-26dB Mid............................................................................+ 12/-26dB High..........................................................................+ 12/-26dB Gain (Mic)........................................................................0 to -40dB Gain (Chnls 1-3)..............................................................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 15W Dimensions...........................................254mm x 305mm x 112mm 10" x 12" x 4 7/16" Weight........................................................................6.5 lbs (3 Kg)
Printed Circuit Boards
Item # 1 2 3 4 5 Description PRINTED CIRCUIT BOARD PC626-1; IN/OUT PRINTED CIRCUIT BOARD BPM250-2; (94V0 203.5×241.5mm) PRINTED CIRCUIT BOARD BPM250-5; LINE/PHONO PRINTED CIRCUIT BOARD BPM250-7; BIT PRINTED CIRCUIT BOARD BPM250-8; BIT DISPLAY (CEM-1 41×166mm) Part # 162-823 162-975 162-978 162-979 162-980
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Parts Lists - PCB1 Input/Output
ICs
Item # 1 Designators A21, A51, A119 Description INTEGRATED CIRCUIT NJM4558L Part # 074-104
Transistors
Item # 1 2 Designators A80, A84, A96, A76 A21, A51, A119 Description TRANSISTOR 2SC2878 TRANSISTOR 2SA1048 (2SA1317) Part # 076-095 076-104
Electrical Parts
Item # 1 2 Designators A104, A105 A1, A2, A3, A4 Description SILICON DIODE 1N4148 4P RCA JACK Part # 079-003 161-105
Parts Lists - PCB2 Main
ICs
Item # 1 Designators Description Part # 074-104 IC201-204, INTEGRATED CIRCUIT NJM4558L IC301-303, IC401-404, IC501 IC502 INTEGRATED CIRCUIT NJM4556L IC601-602 INTEGRATED CIRCUIT LB1412
2 3
074-113 074-111
Electrical Parts
Item # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Designators Q301, Q401, Q501, Q601 D902 SW102, SW302, SW502 SW401 SW601 SW501-503 SW101 VR310-312 VR501 VR201-203 VR402, VR404 VR502 VR403 VR301-303 PJ1 J101 Red 3.15 Green 5x5 Green 2.5x6.5 Yellow 2.5x6.5 Red 2.5x6.5 Description TRANSISTOR DTC114TS ZENER DIODE 1/2 W 10V LEVER SWITCH 4P2C PUSH SWITCH 2P2C L=12.5 PUSH SWITCH 4P2C L=12.5 3KEY PUSH SWITCH 2P2C L=12.5 P=15mm SLIDE SWITCH SLIDE VR 45mm L=20 10KA×2 SLIDE VR 30mm L=15 10KB×2 ROTARY VR 16f L=20 50KB×2 ROTARY VR 16f L=20 50KA×2 ROTARY VR 16f L=20 20KMN×2 C.C ROTARY VR 16f L=20 50KE×2 C.C PHONE JACK 6.3f PHONE JACK 6.3f+ XLR LIGHT EMITTING DIODE (RED) 3.15f LIGHT EMITTING DIODE (GREEN) 5×5 LIGHT EMITTING DIODE (GREEN) 2.5×5 LIGHT EMITTING DIODE (YELLOW) 2.5×5 LIGHT EMITTING DIODE (RED) 2.5×5 Part # 076-094 079-025 082-019 083-069 083-097 083-076 081-004 072-091 072-097 071-103 071-084 071-136 071-145 092-078 092-090 080-091 080-090 080-077 080-076 080-075
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PCB2 - Main
Page 7
PCB1 - Input/Output
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Schematic
PHONEJACK1
+15V
R301 3K6 C104 47/16 R102 820 C103 22/25 3 R101 C101 2K2 4.7/25 8 IC101A 4558L CN1 1 2 R104 36K C105 222 R105 470K C106 822 C107 47/16 R106 100 SW101 PH\LN 1 R202 510 R203 4K3 R303 1K5
VR301-1 50KEx2 C302 154 C301 R304 30K 154
R302 1K5
-15V +15V
+15V
Q401 DTC114
R404 RES11
L.CH
INPUT SELECTY SW201-1 CHANNEL 1
C202 22P R201 5K1 C201 10/25
VR201-1
C403 33P R411 51K
2 3
IC201A 4558L 1 8 R204 100 C204 47/16 CH1 GAIN 50KBx2 C203 10/25
R306 VR302-1 2K4 50KEx2
R305 4K7
C303 22P
R401 SW401 12K IN OUT LED401
C401 4.7/16
R402 56K R405 1K8 R406 51K R407 33K R408 33K R425 1K8 R409 12K R410 12K C402 1/50
C102 100P PH-1/LN1
R103 47K
R107 220K
R258 220K 5 R205 5K1 C206 6 10/25 C207 22P R206 510 4
C205 47/16 R208 100 7 R207 4K3 vr201-2 TREBLE MIDDLE C208 10/25 R309 30K
VR303-1 50KEx2
C304 562 R307 30K R308 5K6 IC301A 4558L 1 R311 100 C308 47/16 C309 47/16
ZD401 2/1W 10V Q402 DTC114 R403 6K2
R412 100
C404 47/16 4IC401A 4558L 1 8 5 C406 47/16 C405 22/25 R414 5K1
R415 5K1
R416 1K
R417 7K5 R421 33
2 3 R413 100
6 7
C407 47/16
C408 2.2/50
IC403A 4558L 4 2 1 3 8 C409 47/16
C109 100P
C111 C112 222 822 R110 47K R111 36K 6 5 4 R112 470K IC101B 4558L 7 C114 47/16 C113 47/16 CN2 R114 220K
R257 27K
IC201B 4558L VR201-2
C305 2 103 R310 8K2 R312 24K 3
C306 10/25
VR310 CHANNEL 1 LEVEL
IC401B 4558L
R422 33 C410 47/16
R418 100K MASTER VR404 50KAx2
8
SW201-2
C307 682 BASS C310 682 R313 24K R315 8K2 C312 682 4
Q403 DTC114
R419 1K
R420 7K5
C412 33P R432 51K BOOTH VR402 50KAx2 R436 5K1 BALANCE VR403 20KMNx2 IC403B 4558L C417 2.2/50 6 7 5 C415 22/25 R434 5K1 C416 47/16 7 IC402B 4558L R437 100K
+15V
R209 27K R211 100 3 R210 2K C209 22P C210 47/16 C211 47/16 2 4 R213 10K C212 47/16 6 R215 2K 5 R214 27K 7 IC202B 4558L R212 100 8 IC202A 1 4558L
C108 4.7/25 R.CH
R108 2K2
5 6
R109 820
C110 22/25 R113 100 C117 47/16 R120 100
R316 30K
R314 100 7 IC301B 4558L
C311 10/25
R423 5K1 CROSSF ADER VR401 100KB R438 5K1
R424 5K1
R426 1K8 Q404 DTC114 R427 51K R428 33K R429 33K R430 12K R431 12K
R433 100 C411 1/50 2
C413 47/16 4 IC402A 4558L 1
6 5
3 R435 100
R317 5K6 R318 30K
8 C414 47/16
+15V
L.CH R115 1K
R116 180
C116 47/16 3 2 R117 47K R118 8K2 C118 822 R119 100K C119 223 8 IC102A 4558L 1 R121 2K2
VR301-2 C313 562
R439 5K1
R440 1K
R441 7K5 IC404A 4558L C418 2.2/50 2 3 4 1 R447 33 R446 33
R319 2K4
VR302-2 R320 4K7 SW402-1 C314 22P R322 30K CH2 PUNCH SW403-1 CH3 PUNCH C502 22P R516 100 IC502A C501 47/16 1k5 1K R326 1K5 SW402-2 SW403-2 R517 3K3 VR501-1 R501 R502 5K1 CUE SELECT 5K1 SW501-1 R503 3K R518 100 LED501 R504 5K1 SW502-1 R506 3K LED502 R507 5K1 SW503-1 R508 5K1 5 C518 1/50 R505 5K1 C505 22P R519 3K3 IC501B 4558L 7 R526 100K 7 6 5 IC502B 4558L C514 220/16 VR501-2 6 C516 10/25 VR502-2 C503 10/25 2 3 4 IC501A 4558L 1 C504 47/16 10KBx2 CUE PGM 50KAx2 CUE LEVEL R524 1K C507 220/16 C508 10/25 C509 1/50 4558L 3 2 R520 100K VR502-1 C512 47/16 R523 47 C513 33P R445 100K R525 1K C515 47/16 C517 33P R527 47 R529 47 PHONE JACK C511 47/16 4 1 8
-15V
C510 47/25 R521 33
+15V
R321 1K5 C214 22P R217 4K7 SW202 CHANNES 2 C213 10/25 2 3 IC203A 4558L 8 R218 100 C216 CH2 GAIN 47/16 50KBx2 7 C217 47/16 IC203B 4558L 5 R220 33K C218 10/25 6 C219 10/25 R221 4K7 C220 22P C323 103 TREBLE MIDDEL BASS C326 103 R338 24k R340 30K C222 22P CN5 SW203 CHANNEL 3 R223 4K7 C221 10/25 5 VR202-2 R333 30K C321 682 2 R334 8K2 R335 24K 3 R219 100 7 R909 100K R908 100K R327 1K5 4 1 VR202-1 C215 10/25 C315 154 R323 3K6 R325 3K6 C316 154 VR303-2 VR304-1 50KEx2 C318 154
8 C420 47/16
C115 100P PH-2
R528 47
C419 47/16
R442 100K R443 1K R444 7K5
CN3 C120 100P C122 822 R125 8K2 6 5 R.CH R123 180 C121 47/16 4 C123 223 R126 100K 7 IC102B 4558L R127 2K2 R216 33K
R522 33 C519 102
R124 47K
R122 1K
5 6
C317 R328 154 30K C319 R329 22P 4K7 R330 2K4 VR305-1 50KEx2 C320 562 VR305-1 50KEx2
8
C421 2.2/50
IC404B 4558L 6 5 7
C124 47/16 R128 100
R331 30K R332 5K6 IC302A 4558L 1 8R336 100 C324 47/16 C325 47/16 R337 4100 7 R341 5K6 R342 30K IC302B 4558L C327 10/25 VR311 C322 CHANNEL 10/25 2 LEVEL
L.CH R129 2K2 R130 2K2 R.CH C125 100P C126 100P
C520 102
LN-2
CN4 R136 100 C129 47/16 PCB BPM250-8 PCB BPM250-7
IN CH2 BIT IN CH3 BIT +5V
+5V
L.CH R131 1K
R132 180
C128 47/16 IC103A 4558L
R509 3K LED503 R510 5K1 SW501-2 R511 5K1 C506 10/25
+15V
+15V
+8
+15V
+8 +5 +3 +1 0 PR602 1Kx5 -1
+5 +3 +1 0
R134 8K2 C127 100P PH-3 C135 822 R141 8K2 R133 47K C130 822
R135 100K C131 223
R137 2K2
R339 6 8k2 C328 682
VR203-1 C223 10/25 1 R224 100 C224 CH3 GAIN 47/16 50KBx2 R910 100K R343 24K R345 1K5
VR304-2 C329 562
R512 5K1 SW502-2
R513 5K1
PR601 1Kx5
-1
C132 100P
R140 47K
C136 223 R142 100K R143 2K2
R222 33K
2
VR305-2 R344 4K7 R346 30K C332 154 R347 1K5 R350 1K5 C330 22P
R138 1K IC103B 4558L R.CH
8 9
3 IC204A 4558L
R514 5K1 SW503-2
R515 5K1
-3
-3
C331 154
-5 -7 IC601 LB1412 -10 10 -1 22 2 +1 -3 21 3 +3 -5 20 4 +5 -7 19 5 +8 -10 18 6G -15 17 7 IN -20 16 8 AD VCC 15 9 DI IST 14 10 DEF OSC 13 11 RST VZ 12 C604 4.7/25 R608 5K6 1 2 3 4 5 6 7 8 9 10 11 IC602 LB1413
-5 -7
10 R139 180 C133 47/16 C134 47/16 R144 100 R145 2K2 R146 2K2 C137 100P C138 100P CN6 R226 33K IC204B 4558B 5 6 C226 10/25 R227 4K7 4
C225 47/16 R225 100 7 C227 10/25 VR203-2 C228 22P C333 154 R351 1K5 R911 100K R348 3K6 R349 3K6
VR306-2 VR307-1 50KEx2 C334 154 R352 30K R353 4K7
L.CH
-10 0 +1 +3 +5 +6 G IN AD DI DET RST -1 -3 -5 -7 -10 -15 -20 VCC IST OSC VZ C606 4.7/25 22 21 20 19 18 17 16 15 14 13 12 R610 5K6
-15
LN-3
-15
C335 22P
R.CH
+15V -15V
R354 2K4 VR308-1 50KEx2 R148 68K R149 C139 220 10/25 R150 220 R151 4K7 Q1012SC2878 C336 562 R355 30K VR309-1 50KEx2 R356 5K6 IC303A 4558L 8 1 R360 100 C341 47/16 C342 47/16 R361 24K 5 4 R362 100 IC303B 4558L C343 10/25 VR312 C338 CHANNEL 3 10/25 LEVEL
R601 120K R602 120K R603 120K R604 120K C602 4.7/25 C601 SW601-1 4.7/25 C603 1/50 R607 36K
-20 LED605-616 C605 1/50 R609 36K
-20 LED617-628 R611 1M
L.CH
CN7
R147 47K MASTER OUT
R357 30K
Q1022SC2878 R152 47K R153 C140 220 10/25 R154 68K R155 4K7 R156 220 R159 220 R158 220 C141 10/25 R160 4K7 Q1032SC2878 Q104 2SC2878 C142 R162 10/25 220 R.CH L.CH R165 1K R166 1K R.CH R167 680K CN11 Q105 C143 4.7/25 DCT124TS R370 1K5 R163 4K7 R164 220 R364 30K CN9 CN8 C339 103 C340 103 BASS TREBLE MIDDLE
C337 2 682 R358 8K2 R359 24K 3
C607 2.2/50
SW601-2 LAMP 12V
+15V +15V SW01
R.CH L.CH
LIFT GROUND R701 6K2
+15V C1 472/400V +15V
LED601 SW601-2 R605 6K2
LED701
R157 47K BOOTH OUT R161 47K
IC701 LED602 LED603 SW601-2 R606 6K2 SW601-2 SW601-2 CHASIS GROUND 7815 C701 1/50 C703 1000/25
D701-705 IN4002x5 POWER TRANSFORMER
R363 7 8K2 C344 6 682 R365 5K6 VR307-2 R366 C345 30K 562
C706 223 C702 1/50 C704 1000/25 7915 IC702 C705 220/16 C707 223
SW701 110V/220V SW
LED604
REC OUT
CN10
R367 2K4
VR308-2 R368 4K7 C347 154 R369 30K C348 154 C346 22P
C708 472/500V AC IN PUT JACK FUSE 0.5A
INPUT PCB
C144 220/16
D101 IN4148 D102 IN4148
+15V
-15V
GND
MAIN PCB
R371 3K6
VR309-2
R372 1K5 D910 1N4002 C913 2200/16
110V 60HZ 220V 50HZ
7805 C912 1/16
+5V
BPM-250