In the Hungry Dog arcade redemption game, balls are fed through a motorized gate mechanism into the mouth of the dog character or onto a scoring ramp. A frequent mechanical failure reported by arcade technicians is when the game starts and the motor activates, but balls fail to drop or descend into the play area.
 |
| Hungry dog. Bola tidak mau turun |
Fault Breakdown & Root Cause Analysis
Reported Fault: Balls remain trapped in the feeder hopper/chute and will not release during gameplay.
Root Cause: The ball retainer arm/latch (tahanan bola) has detached from its support bearing.
[Motor Rotates / Cable Pulls] ──> [Retainer Arm Disconnected from Bearing] ──> [Gate Remains Blocked] ──> [Balls Fail to Release]
How the Mechanism Functions
 |
| Diakibatkan dari tahanan bola terlepas dari bearing |
To control ball flow precisely and prevent multiple balls from jamming the intake at once:
Standard Operation: The ball retainer (tahanan bola) pivots on a sealed miniature ball bearing or bushing. When the gate motor energizes, it pulls a linkage rod attached to this retainer arm, lifting it smoothly to allow a single ball to drop.
Failure State: High-impact vibrations from falling balls, loose mounting set-screws, or worn retaining clips (E-clips/C-clips) cause the retainer arm to slide off or pop out of its bearing housing.
The Result: Without the bearing acting as a fixed pivot point, the motor linkage pulls against loose air or jams the arm sideways against the chute wall. The heavy retainer stays in its resting position, permanently blocking the balls from descending.
Step-by-Step Diagnostic & Mechanical Repair Process
Step 1: Access and Visual Inspection
Power Down & Safety: Turn off main power to the cabinet and unplug it to prevent unexpected motor activation while working inside the mechanism.
Open Cabinet Access: Open the front service door or top canopy assembly behind the main "Hungry Dog" character head to access the ball feeding chute.
Locate the Retainer Module: Inspect the pivot point where the metal ball retainer arm meets the support bracket. Look for a dislodged bearing, missing E-clip, or loose set-screw.
Step 2: Repair and Re-assembly
Clear the Jam: Carefully remove all trapped balls from the upper hopper to relieve physical pressure on the mechanism.
Inspect the Bearing: Check the ball bearing for physical damage, rust, or missing steel balls.
If undamaged: Clean old grease and dirt off the bearing race using 99% Isopropyl Alcohol (IPA) and apply fresh synthetic or lithium grease.
If damaged/seized: Replace it with a new miniature bearing of the same inner/outer diameter specifications.
Reattach the Retainer Arm:
Press the pivot shaft of the ball retainer arm firmly back into the inner race of the bearing.
Secure the assembly using a new E-clip / Circlip or tighten the shaft set-screw firmly using threadlocker (Loctite 242) to prevent future loosening caused by cabinet vibration.
Verify Linkage Clearance: Manually move the motor arm by hand. Ensure the retainer arm swings up and down smoothly through its full range of motion without scraping or binding against the plastic chute walls.
Prevention & Maintenance Tips for Gate Ball Assemblies
To avoid recurring ball release jams on Hungry Dog:
Vibration Protection: Apply a medium-strength threadlocker to all mounting bolts and set-screws along the motor linkage and bearing brackets.
Routine Lubrication: Apply a light layer of plastic-safe grease to the pivot points and bearing journals every 3 months.
Inspect Ball Condition: Worn, scratched, or sticky balls increase mechanical drag on the retainer arm. Periodically clean arcade balls or replace damaged ones to maintain smooth flow.
Summary Checklist for Ball Feed Issues
| Issue Identified | Primary Suspect | Quick Repair Action |
| Motor turns, but gate does not open | Retainer arm popped off bearing / disconnected linkage | Realign shaft into bearing; replace missing E-clip and apply threadlocker. |
| Motor buzzes loudly and stalls | Seized bearing or ball jammed under retainer arm | Free the physical obstruction; replace seized bearing if it doesn't spin freely. |
| Gate opens partially, balls roll slow | Weak motor voltage or stripped gearbox | Check power supply rail; inspect internal gearbox for stripped plastic gears. |
On physical redemption games like Happy Kangaroo—where players stomp, jump, or hit mechanical targets to bounce the kangaroo character and score points—a common issue reported by arcade floor operators is the score display failing to respond or register points during gameplay.
 |
| Score tidak merespon. Dikarenakan soket sensor ada yg terlepas |
On ticket redemption machines like Slam A Winner, players earn physical tickets based on their final score or jackpot hits. One of the most frequent operational errors faced by arcade technicians is when the machine registers points successfully, but fails to dispense physical tickets (often accompanied by an alarm sound or error code on the display).
 |
| Slam a winner, tiket tidak keluar |
Failure Symptoms
Error Code Displayed: The game board enters an error state (often showing
Er 03,Err-Tk, or similar ticket fault indicators depending on the mainboard model).Motor Runs Continuously: The ticket dispenser motor keeps spinning endlessly without pushing paper out, eventually triggering a timeout system halt.
Complete Silence: When points are scored, the ticket motor does not run at all, and no tickets are fed.
Jam & Tear: Tickets enter the mechanism but crumple, jam, or tear before exiting the payout notch.
Failure Analysis: Where Is the Problem Located?
 |
| Tiket tersangkut akibat terjepit |
When tickets fail to pay out, the fault typically lies in one of four areas:
[Mainboard CPU Signal] ──> [Wiring Harness / Power supply] ──> [Dispenser Motor Mechanism] ──> [IR Ticket Notch Sensor]
Mechanical Jamming: Paper lint, foreign objects, or misaligned paper feed paths.
Optical Notch Sensor Failure: The dispenser's infrared sensor fails to count paper notches, so the CPU doesn't know tickets are exiting.
Motor Circuit Failure: The $12\text{V DC}$ drive motor or its control transistor is damaged.
Logic & Driver IC Issue: The mainboard PCB signal buffer (e.g., input/output logic ICs) is not transmitting the command.
Step-by-Step Diagnostic & Repair Process
 |
| Tiket tersangkut akibat terjepit |
Step 1: Physical & Mechanical Inspection
Check Ticket Stock: Ensure tickets are properly loaded, not folded incorrectly, and that the tension roll is not too tight.
Inspect the Roller Path: Open the ticket dispenser module (such as Deltronic Labs DL-1275 or similar standard mechanisms). Check rubber rollers for wear, hardening, or accumulated paper dust.
Clean Rollers: Wipe down drive rollers using 99% Isopropyl Alcohol (IPA) to restore grip.
Step 2: Testing the Optical Ticket Notch Sensor (IR Sensor)
Most arcade ticket dispensers use an infrared through-beam sensor to detect the small triangle notches between individual tickets.
Symptom of Dirty/Faulty IR Sensor: The motor dispenses tickets continuously without stopping until an error triggers, or it dispenses 1 ticket and immediately halts with an error.
How to Fix:
Blow out dust from the optical notch sensor channel using compressed air.
Use a cotton swab with IPA to clean the small optical lenses (transmitter and receiver) on the dispenser board.
Inspect the notch LED status on the dispenser board: the LED should flash rapidly as tickets pass through the beam gap. If the LED stays solid ON or OFF, replace the ticket sensor board assembly.
Step 3: Voltage & Wiring Verification
Measure power input at the ticket dispenser connector pins using a multimeter:
Power Pin: Should read $+12\text{V DC}$ (or $+5\text{V DC}$ depending on dispenser model).
Ground (GND): $0\text{V}$.
Measure the Enable/Trigger Line while triggering a payout test:
When activated, the control line from the mainboard should pull LOW or HIGH to signal the motor drive circuit.
If $+12\text{V}$ power is missing, check cabinet fuses or power supply connections.
Step 4: Board-Level Diagnostic (Mainboard Driver Repair)
If the ticket motor, wiring, and sensor are tested and functional on a bench setup, but the machine still won't trigger payout from the main cabinet:
Trace the Ticket Output Line: Trace the trigger trace from the ticket output header back to the mainboard drive transistor or ULN darlington array IC (e.g., ULN2003 / ULN2803) or buffer logic IC.
Check Buffer ICs: As seen with coin input faults, signal line drivers between CPU and peripheral ports can burn out from power fluctuations.
Replace Damaged Transistor/IC: Desolder and replace damaged drive transistors or ICs on the main board to restore output control to the dispenser.
Quick Reference Troubleshooting Summary
| Symptom | Primary Cause | Recommended Action |
| Motor runs constantly, no stop | Dirty/Defective IR Notch Sensor | Clean sensor channel with IPA or replace dispenser optical board. |
| Motor does not turn at all | Blown fuse, broken wire, or dead motor | Check $+12\text{V}$ supply line and measure motor coil continuity. |
| Tickets jam frequently | Worn rubber rollers or physical obstruction | Clean rubber wheels; replace dispenser roller assembly if hardened. |
| Error code shown, sensor verified working | Faulty driver on mainboard PCB | Trace PCB output line; replace buffer IC or drive transistor. |
On frog-launching redemption games like Happy Frog, players smash physical target buttons to activate mechanical launchers or lifts that throw plastic frogs onto scoring lily pad targets.
When the machine displays Err 01, Err 02, Err 03, or Err 04 alongside a failure where the frog mechanism cannot rise or launch ("Katak tidak bisa naik"), the issue points directly to a failure in the solenoid actuation circuit, position detection sensors, or mechanical linkage assembly.
 |
| Happy frog Err 1-4 |
 |
| perbaikan/ penggantian |
berfungsi sebagai pengaman hubungan singkat/korselet serta mempunyai fungsi pengaman beban lebih,MCB otomatis akan memutuskan arus bila arus yang melewatinya melebihi batas nominal yang telah ditentukanpada MCB tersebut,
nominal arus MCB adalah 1A,2A,4A,6A,10A,16A,20A dan lain sebagainya.
Beberapa manfaat (fungsi MCB) adalah sebagai berikut :
1. Pengaman hubungan arus pendek
secara otomatis MCB akan trip bila terjadi korslet/ arus pendek
2. Mengamankan beban lebih
secara otomatis MCB akan trip bila over beban
3. Sebagai saklar utama
MCB untuk memutus semua arus listrik didalam line instalasi
 |
| MCB terbakar |
 |
| disebabkan baut skun kabel kendor |
Langganan:
Postingan (Atom)
