Rokola Music
Modernization of jukeboxes
J u k e b o x D i g i t a l R K 4
33
Venezuela-Puerto Cabello Cell: +58 414-3453712 E-mail:
oliveira71059.gmail.com
4.3 - Jukebox Connectors (RK4)
W1
Original keyboard cable.
W2
PCB cable from the keyboard to the keys. This wiring depends on the keyboard used in the project.
W3
Parallel cable DB25P to DB25P
Computer LPT1 (DB25S)
DB25P
Signal
6
6
Bit 4 – P888
4
4
Bit2 – P888
5
5
Bit 3 – P888
7
7
Bit 5 – P888
8
8
Bit 6 – P888
2
2
Bit 0 – P888
9
9
Bit 7 – P888
3
13
Bit 1 – P888
1
1
Bit 0 – P890 (Salida Negada)
14
14
Bit 1 – P890 (Salida Negada)
24
24
GND
GND = 18, 19, 20, 21, 22, 23, 24
NOTE:
The port number of the LPT1 is configurable, by default the H378 or 888 decimal is assigned.
W4
Stereo Plug Audio Cable (3.5mm) to RCA plug termination.
W5
Audio cable with terminals on both ends.
Electrical Diagram Description
POWER SUPPLY 5V and 12V
These are taken from the computer, for this it is necessary to connect to said voltages, in this case it is done
with a 9-pin female submianiature connector which is installed in one of the slots of the computer and then connected
to the power supply.
(W6 cable)
DISPLAY CARD LY-252
By means of a parallel cable of male connector 25 pins both tips, the display card is connected to the printer
port of the LPT computer the card must be connected to the 5V to be powered. It has two outputs: credit indicator
(Bonus) and Hit or Power relay indicator.
(W3 cable)
CREDIT INDICATOR (BONUS)
The display card LY-252 has an output which turns on a high brightness LED to indicate that the Jukebox
has credit available (Bonus) to be able to play a song file.
(W9 cable)
RELAY CONTROL or HIT INDICATOR
This display card output indicates that the song playing has already been selected more than 100 times, it
turns on a high brightness LED, it can also be programmed to activate a relay (5V coil) in order to control a device.
(W10 cable)
COIN DETECTOR
The coin detector varies according to the model, in the case of the RK4 program it is designed to detect a
variation from 0V to 12V by means of the serial port and thus detect the entry of a coin, the signal must enter through
a connector of 9 female pins, for pin 2 and GND on pin 5, the serial port number must be configured in program RK4
in the Command Configuration window, for example 1 if COM1 port is available, also set how many credits per coin.
(W7 cable).
KEYBOARD
DISTRIBUTOR
The keyboard distributor is usually constructed of a standard keyboard separating a part containing the
numbers from 0 to 9 (Numeric Keypad) and another containing the desired Command keys (Command Keypad), for
this it is necessary to electrically intervene the keyboard circuit and make a wiring for each of the keyboards used by
the Jukebox. I have used the card of an HP keyboard model KB-0316 with very good features.
(W1 cable)
