Trouble Shooting Ch1. Proper way to fill a column Ch2. Cleaning the rollers Ch3. Adjusting the...

Trouble Shooting

Ch1. Proper way to fill a column

Ch2. Cleaning the rollers

Ch3. Adjusting the column

Ch4. Swapping columns

Ch5. Column gears

Ch6. The optical sensor

Ch7. PCB layout

Ch8. DC voltage

Ch9. Changing chips

Ch10. Changing door LED bulb

Ch11. Adding a sign above LED bulb

Ch12. Changing the Lexan film

Ch13. Dealing with defective door switch

Ch14. Main door switch

Chapters (click on any of the following sections to view)

1. Proper way to fill a column

Make sure the tickets are relatively straight … … and not excessively warped: this can cause jams Excessive warping can be eliminated by moderately bending the tickets in the direction opposite to the warp (or ‘bow’ as it is sometimes called). The ideal ticket will only have a slight or hardly-visible bow

The tickets must be loaded in the column with the bow down (the size of the bow in the image is an exaggeration for the sake of emphasis)

1. Proper way to fill a column

Load just one ticket.This ticket should automatically slide under the ticket gate (if it does not, the ticket gate is too tight and will need to be adjusted: part #3 of this presentation)

Do not release the tickets from too high up … this can cause the bottom

tickets to fall at too steep of an angle

Manually turn the biggest gear until the LED in front of the column turns off (the ticket should have moved forward about ½”)

Load the rest of the tickets in comfortable chunks: with one hand balance a group as it is being lowered down the column … with the other hand ruffle the tickets slightly once or twice (by gently running the back edge of the fingernail upward,

against the tickets: this straightens them out). With a little practice, an entire column can be filled in seconds

2. Cleaning the rollers

TURN OFF THE POWER

(and unplug the battery)

before performing this procedure

TURN OFF THE POWER

2. Cleaning the rollers

The rollers maneuver the ticket from the bottom of the column to the dispensing chute. They need friction – the ability to ‘grab’ the ticket - in order

to be able to reliably perform their job.

This friction is achieved by the rough coating applied to the rollers (which is visible in this picture). This coating is very resilient: it hardly ever gets damaged. What does happen, however, is that waxy glazing from the tickets, over time, deposits on top of the coating

Cleaning the rollers of this waxy residue is one of the more important maintenance routines to be performed (recommended every 2 months on busy machines). It is also a quicker (and many times more relevant) fix to a misbehaving column than gate adjustments and column swaps, which are discussed later in this presentation

2. Cleaning the rollers

Materials: a well-wrung, damp cloth (either warm water, Windex, or white vinegar may be used) – because of the liquids the machine should first be turned off

Press the damp cloth against the rollers (green arrows) and manually turn the gears (red arrows). All tickets must be dispensed in order to reach the back roller but the

column does not need to be removed …

2. Cleaning the rollers

To remove any excess moisture, perform a final run with a dry cloth … if you suspect that liquid has dripped onto electronic components, do not turn on the machine. This scenario can be avoided by applying moisture

only to a miniscule portion of the cloth and by wringing it out sufficiently before applying the liquid to the rollers

3. Adjusting the column: ticket gate

Start with: 1 empty column and 2 ticketsDrop the tickets inside the column, but do not manually feed the first ticket as you

normally would when preparing to dispense

3. Adjusting the column: ticket gate

Using a 11/32 nut driver loosen the gate which regulates the flow of ticketsUsing a pen, or other sharp object – lift the gate until the tickets fall down and lie flat

inside the columnNotice how both tickets now lie under the column gate

3. Adjusting the column: ticket gate

Push down firmly on the gate [notice how the tickets rise] and re-tighten the two nuts before releasing

3. Adjusting the column: ticket gate

• Using the large gear on the side of the column, roll the two tickets out

Always test the column after doing a gate adjustment

• Re-feed the same two tickets and observe whether only one at a time passes under the gate

if so …

• Fill the column with a large known quantity of tickets and - in test mode - dispense the entire amount

4. Swapping columns

TURN OFF THE POWER

(and unplug the battery)

before performing this procedure

TURN OFF THE POWER

4. Swapping columns

The printed circuit board (PCB), which provides power and data to the four columns, must first be removed … it has five screws

4. Swapping columns

Do not misplace any of the screws or washers

4. Swapping columns

Gently pull out the PCB, paying …… particular attention to not damage the 4 five-pin connectors which plug

into the columns

4. Swapping columns

Lay the PCB down

4. Swapping columns

Using a 3/8 nut driver loosen all clamps which hold a column in place … and turn them 90 degrees [either to the left or right]

4. Swapping columns

Slide out the column

4. Swapping columns

… and clean out the paper dust. After dispensing hundreds of thousands of tickets a sizable amount can be present

4. Swapping columns

Swap in a new column and reinstall the PCB (do not tighten the clamp before reinstalling the PCB)

4. Swapping columns

… Again, pay particular attention to the 4 sets of five-pin connectors: all pins must be inserted simultaneously

4. Swapping columns

It is often necessary to nudge a column a millimeter, or so, to the left or to the right

4. Swapping columns

Insert the PCB just a millimeter and verify that each connector … … is connected into the right slot. Please re-verify the connections before pushing the PCB all the way in (especially check that no two pins are jammed into the same slot)

4. Swapping columns

• Screw in the five screws/washers • Tighten the clamps in their original position• Power on the machine• Verify that each column dispenses tickets in an

acceptable manner.

• Swapping columns is a common diagnostic test. If a problem ‘follows’ a column, then there is most likely a problem with that column

5. Column gears

If any of the gears are chipped, (not in this picture) they will need to be replaced

5. Column gears

Tools: two Allen wrenches (the larger one, 1/16” hex, is for all but the smallest gear which uses a .035” hex) and locktite (to prevent the gear from coming undone through years of usage)

5. Column gears

You will need to use a bit of force to break through the locktite that has been applied by Arrow Technicians when the column was first constructed

5. Column gears

If, using moderate force, you can pull apart the two largest gears [such that the teeth no longer make contact and you can rotate one independent of the other] the entire column

must be sent in to Arrow for repair

6. The Optical Sensor

There is a ticket under this sensor

6. The Optical Sensor

There isn’t a ticket under this sensor

6. The Optical Sensor

The PCB connecting the columns will use the green LEDs to indicate whether there is a ticket underneath a column’s optical sensor.

off = yes, there is a ticket … on = no, there is no ticket

6. The Optical Sensor

If you slide a ticket back and forth under the sensor (by manually turning the biggest gear) and the LED does not react, the sensor either needs to be cleaned, adjusted, or replaced

7. PCB layout

Power to door switch (explained later)

Main power

Data from main PCB

Battery – if one plug is disconnected the battery is out of the circuit

Power to the PCB of an 8-column machine

You may take a DC voltage reading from either of these pairs of connectors

8. DC Voltage

Optimal DC voltage is 14.2V (if higher, tickets will dispense too fast; if lower, too slow). Be careful … do not to touch the two leads together

8. DC Voltage

If the voltage ‘is off’ by more than .3V there is a variable resistor on the main PCB which can be adjusted to fine tune the machine

8. DC Voltage

TURN OFF THE POWER

(and unplug the battery)

before performing this procedure

TURN OFF THE POWER

8. DC Voltage

The main PCB on the newest Nevada Golds is located almost directly behind the LED panel (though parts of the PCB, including the variable resistor, can be reached by going up from the

validator doorway, or down from the display doorway)

8. DC Voltage

There are 4 butterfly screws holding the LED panel which need to be removed by reaching inside the machineThis is a partially removed LCD displayLet the LCD display dangle by the wires

8. DC Voltage

This is the variable resistor (looking from behind the LCD display … … and from behind the bill validator) … using whichever perspective you prefer, gently turn the resistor using a driver [while simultaneously measuring the DC voltage as previously instructed (the machine will need to be turned on)]: you will NOT feel a click when adjusting the resistor

9. Changing chips

It is necessary, on the newer Nevada Golds, to have removed the LCD display in order to change chips. The slave chip is the most frequently changed: 90% of the times when a ticket

dispersal issue is not fixed by swapping columns, it will be fixed by changing this chip

Using a chip puller, gently ease out the chip (do not attempt this without a chip puller – either in the extraction or insertion, a pin is very likely to be damaged) – make a note of

the chip’s orientation

9. Changing chips

If a new chip’s pins are sticking out, and not at 90 degrees with the body of the chip, place the chip on its side on a table and gently push it in so that the pins readjust to 90

degrees (of course, don’t push it too much)

10. Changing Door LED bulb

TURN OFF THE POWER

(and unplug the battery)

before performing this procedure

TURN OFF THE POWER

10. Changing Door LED bulb

If this goes out …Turn it clockwise and pull down (remember how it was oriented when you

pulled down – you will need to reinsert it in the same direction)Change the bulb and fasten it with some tape

If the LED bulb is not inserted correctly, the red switch will not get pressed when the user attempts to dispense a ticket

11. Adding a sign above the LED bulb

Before reinserting the LED bulb, take this time to add a sign (such as the pricing of the tickets dispensed by the column) above the LED bulb

Take out the spring. Hold with pliers and give it a quick jab down the middle to knock out the red cap … this can be rather fun; but, enjoy responsibly

12. Changing the Lexan Film

TURN OFF THE POWER

(and unplug the battery)

before performing this procedure

TURN OFF THE POWER

12. Changing the Lexan Film

The Lexan Film guides dispensed tickets so they stack correctly. After several hundred thousand are dispensed the strip can wear out. Notice the relative position of the arches of the

Lexan Film to the bar which holds the strip in place

You will need to take out all four LED bulbs and unscrew the 3 nuts of the metal bar which holds the Lexan Film in place

If the machine has a lightbar inside the ticket chamber you will also need to permanently remove the two conduits which hold the lightbar in place, and replace them with a new

pair once the Lexan Film has been replaced

Check for cracks … the tickets hit the Lexan Film at exactly the

same spot every time

13. Dealing with a defective door switch

TURN OFF THE POWER

(and unplug the battery)

before performing this procedure

TURN OFF THE POWER

13. Dealing with a defective door switch

This switch will not allow tickets to be dispensed until the ticket door is closed. It can malfunction … and never allow tickets to be dispensed at all (regardless of the position

of the door)

You may either a) send in the entire machine to Arrow for repairs, or b) unplug both of these connectors (disabling the switch)

14. Main door switch

It can be in 3 positions (middle, pushed in, pulled out) … the first two are what you get from closing and opening the door. The last, having the switch pulled out, allows a technician to operate a machine as if the door were actually closed (when in reality it is open … observe how the machine asks to insert money, even though

the door is open)

Arrow International

Please contact the Technical Assistance Center for any further technical questions about our products

1-800-277-6214

If you have any comments, or suggestions, specifically related to this presentation - or its future revisions - you can contact the Technical Writing Team directly at

TWT@arrowinternational.com

Thank you !