Gemini Bpm-1 User manual

Page 1

SERVICE MANUAL

BPM-1

PROFESSIONAL AUTOMATIC BEAT COUNTER

CONTENT’S:

Connections & Operations:.......................................................Page 2-3

Specifications:..............................................................................Page 3

Parts Lists:.................................................................................Page 3-4

PCBs:..........................................................................................Page 5-6

Schematics:..................................................................................Page 7

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

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Page 3

Connections

1. Make sure that the POWER (13) switch is in the off position. The

POWER LED (14) will be off. This unit comes supplied with a 15 volt

AC adaptor. Plug the adaptor into the rear panel power jack. Then plug

the adaptor into a proper power source.

2. Use the 4 stereo PHONO/LINE (2, 5, 8, 11) inputs on the rear panel to

connect to the output of your sources. The PH1/LN1 (12) switch

enables you to set the CHANNEL 1 (11) input sensitivity to Phono or

Line. The PH2/LN2 (9) switch enables you to set the CHANNEL 2 (8)

input sensitivity to Phono or Line. The PH3/LN3 (6) switch enables you

to set the CHANNEL 3 (5) input sensitivity to Phono or Line. The PH4/

LN4 (3) switch enables you to set the CHANNEL 4 (2) input sensitivity

to Phono or Line. Note: When using turntables, don’t forget to connect

the ground wire from your tuntable to the ground screw of your mixer.

3. The BPM-1 is supplied with 4 sets of OUTPUT (1, 4, 7, 10) jacks. If you

are using a turntable and have the input set to phono, the

corresponding output must be connected to phono inputs on your

mixer. If you have the input set to line, the corresponding output must

be connected to line inputs on your mixer. Use the CHANNEL 1

OUTPUT (10) jacks to connect to the appropriate inputs on your mixer.

Use the CHANNEL 2 OUTPUT (7) jacks to connect to the appropriate

inputs on your mixer. Use the CHANNEL 3 OUTPUT (4) jacks to

connect to the appropriate inputs on your mixer. Use the CHANNEL 4

OUTPUT (1) jacks to connect to the appropriate inputs on your mixer.

Operation

1. POWER ON: Once you have made all the equipment connections, press

POWER (13). The power will turn on and the POWER LED (14) will

glow RED. When you turn on the BPM-1, the unit will run through an

initialization period in which the BPM DISPLAYS (17, 19) and the BEAT

OFFSET INDICATORS (18) will flash. When the flashing stops, the unit

is ready for use.

2. The ASSIGN (16, 21) buttons allow you to select which channel will be

displayed on each side of the BPM-1. Press the ASSIGN (16) button to

select channel 1, 2, 3 or 4 to be displayed on the left BPM DISPLAY

(17).The ASSIGN LED (15) will indicate the channel you selected.

Press the ASSIGN (21) button to select channel 1, 2, 3 or 4 to be

displayed on the right BPM DISPLAY (19). The ASSIGN LED (20) will

indicate the channel you selected.

3. BPM DISPLAY: There are BPM DISPLAYS (17, 19) for each side of the

BPM-1. They update approximately every 2.5 seconds and digitally

display the Beats Per Minute allowing you to match the beats visually.

BPM DISPLAY (17) reflects the Beats Per Minute of the channel

assigned to the left side of the unit, and BPM DISPLAY (19) reflects

the Beats Per Minute of the channel assigned to the right side of the

unit.

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.

4. The BEAT OFFSET INDICATORS (18) 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

NOTETE

TETE

TE: If the difference 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 2.5

seconds and will reflect the change in BPM and indicate when the beats

are aligned.

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 that have clear and strong beats.

Specifications

INPUTS:

Phono......................................................................................3 mV 3 MOhm

Line.....................................................................................150 mV 3 MOhm

OUTPUTS:

Input/Output Resistance..................................................................<0.1 Ohm

GENERAL:

BPM Range.............................................................................60 - 180 BPM

Power Adapter...........................................................115V/15V AC 500 mA

230V/15V AC 500 mA

Dimensions......................................19”w x 1.75”h x 3”d (483 x 44 x 78 mm)

Weight.....................................................................................3 lbs (1.5 kg)

Description Part #

Cabinet Parts and Packing

Item #

Parts Lists

031-032

021-461

002-571

003-732

003-372

049-190

196-061

255-131

157-962

110-166

121-003A

110-172A

111-044A

111-046A

131-057

CASE

CHASSIS

KNOB PUSH

HOLDER LED (3ø 6.5mm)

PLATE DISPLAY (SMALL)

CLIP WIRE

SERIAL NO. LABEL

GIFT BOX

OWNER’S MANUAL

BAND-HEAD TAPPING SCREW (TWIN)

BAND-HEAD TAPPING SCREW/TW-E

BAND-HEAD TAPPING SCREW (TWIN)

BAND-HEAD TAPPING SCREW ( “NUT” )

BAND-HEAD TAPPING SCREW

NUT/WASHER

262-239

262-240

PRINTED CIRCUIT BOARD BPM1-1

PRINTED CIRCUIT BOARD BPM1-2

Description Part #

Printed Circuit Boards

Item #

Page 4

074-155

074-157

INTEGRATED CIRCUIT M66313FP

INTEGRATED CIRCUIT SC87C51CCN40

IC5

IC1

Designators Description Part #

ICs

Item #

Parts Lists - Meter PCB

079-027

079-003

161-169

081-027

RECTIFIER DIODE 1N4002 (1N4003,1N4004)

SILICON DIODE 1N4148

4P RCA JACK

SLIDE SWITCH 2P2C PH/LN

D18

D8-10, D12-14

J1-4

SW1-4

Designators Description Part #

Electrical Parts

Item #

074-011

074-074

INTEGRATED CIRCUIT UPC324

INTEGRATED CIRCUIT NJM7805FA

IC2, IC3, IC4, IC8

IC7

Designators Description Part #

ICs

Item #

Parts Lists - Main PCB

080-102

080-003

080-062

080-063

082-041

052-018

LED NUMERIC DISPLAY

LIGHT EMITTING DIODE (RED) 3ø

LIGHT EMITTING DIODE (YELLOW) 3ø

LED (GREEN) 3ø

TACT SWITCH

CERAMIC RESONATOR 12 MHz

A, B

D1-2, D6-7,

D20-27, D30

D3, D5

SWA, SWB

XT1

Designators Description Part #

Electrical Parts

Item #

Page 1

SERVICE MANUAL

BPM-1

PROFESSIONAL AUTOMATIC BEAT COUNTER

CONTENT’S:

Connections & Operations:.......................................................Page 2-3

Specifications:..............................................................................Page 3

Parts Lists:.................................................................................Page 3-4

PCBs:..........................................................................................Page 5-6

Schematics:..................................................................................Page 7

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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