Technical & Engineering Guide: Operating & Troubleshooting "Hungry Dog"

The Hungry Dog (Funny Penguin, Funny Duck) arcade machine is a physical ball-toss ticket redemption game commonly installed in major family entertainment centers (such as Trans Studio Mini, Timezone, and Fun World). Understanding both its operational gameplay cycle and maintenance routines helps technicians maintain high machine uptime and prevent ticket dispenser errors.

1. Gameplay & Operational Sequence

[Card Swipe / Token Insert] ──> [Gate Opens & Balls Release] ──> [Player Tosses Balls] ──> [Sensors Register Score] ──> [Tickets Dispensed]

1. Transaction Phase: The player swipes their card (e.g., Trans Studio Mini card reader) or inserts a token. The reader sends a credit pulse to the mainboard CPU.

2. Ball Feed Phase: The CPU signals the gate motor to actuate, releasing physical balls down into the player's tray.

3. Gameplay Phase: The player throws the balls, aiming for the open mouth of the dog character.

4. Scoring Phase: Optical IR sensors inside the mouth/chute register each successful hit, incrementing the score on the main display.

5. Payout Phase: Once the gameplay timer ends, the PCB calculates total points and commands the ticket dispenser to pay out physical or electronic tickets accordingly.

2. Ticket Reload & Reset Procedure

When ticket stock runs out or an error occurs during payout, perform the following steps to clear the error state and reload tickets:

1. Load New Ticket Stock: Insert the new ticket strip into the guide channel of the ticket dispenser (e.g., Deltronic Labs DL-1275) until the drive rollers catch the paper.

2. Press the Ticket Reset Button: Locate the red or black Ticket Reset microswitch on the service panel (or mainboard) and press it to clear the memory buffer and reset the ticket counter.

3. Clean the Optical Notch Sensor:

   • Dust and paper lint from ticket perforation often accumulate in the sensor gap.

   • Cleaning Action: Use compressed air (or blow directly into the sensor channel) to clear debris. Clean the optical lenses gently using a cotton swab lightened with 99% Isopropyl Alcohol (IPA).

   • Note: A dirty notch sensor prevents the CPU from detecting passing tickets, causing continuous motor spinning or triggering an instant ticket fault alarm.

3. Error Codes & Troubleshooting Guide

Below are the three most common field failures encountered on Hungry Dog cabinets, along with their diagnostic paths:

Error 1: Display Shows "HLP" (Ticket Error)

• Symptoms: The score display flashes HLP (Help/Ticket Fault), accompanied by an audible alarm.

• Possible Causes:

  1. Ticket strip is torn or completely empty.

  2. Tickets jammed inside the dispenser output chute.

  3. Optical ticket notch sensor covered in paper dust or failing electronically.

  4. Ticket dispenser motor harness disconnected or blown driver transistor on PCB.

• Solution: Clear paper jams, refill ticket stock, clean the optical notch sensor with compressed air/IPA, and press the Ticket Reset button.

Error 2: Balls Fail to Release (Bola Tidak Keluar)

• Symptoms: Game accepts credits and timer starts, but no balls drop into the play tray.

• Possible Causes:

  1. Ball retainer arm detached from its support bearing (tahanan bola terlepas).

  2. Gate motor gearbox stripped or motor coil degraded/weak.

  3. Gate position microswitch or optical sensor damaged/misaligned.

  4. Broken pull wire or disconnected linkage rod between motor and gate lever.

• Solution: Inspect the gate mechanism behind the character head. Reattach the retainer arm into the bearing race and secure with an E-clip. Inspect internal reduction gears; replace motor assembly if gears are stripped.

Error 3: Machine Completely Dead / No Power (Mesin Mati)

• Symptoms: Cabinet LEDs, displays, and card readers remain unlit when the main power switch is turned ON.

• Possible Causes:

  1. Blown main AC fuse at the power inlet socket.

  2. Disconnected or broken main AC power cord.

  3. Faulty switching power supply (no $+5\text{V}$ or $+12\text{V}$ output).

• Solution:

  1. Test wall outlet voltage.

  2. Use a multimeter to check continuity across the main glass fuse ($250\text{V} / 5\text{A} - 10\text{A}$). Replace if blown.

  3. Measure DC output at the switching power supply screw terminals ($+5\text{V}$ for logic, $+12\text{V}$ for motors/sound). Replace PSU if AC input is present but DC outputs remain $0\text{V}$.

Quick Reference Matrix for Technicians

Issue	Primary Cause	Quick Field Fix
"HLP" Flashing on Display	Empty tickets or dirty notch sensor	Refill ticket stock, blow out paper dust from sensor, and hit Ticket Reset.
Balls Stuck in Hopper	Retainer arm popped off bearing	Press arm shaft back into bearing; secure with E-clip and threadlocker.
No Power to Cabinet	Blown AC fuse or dead PSU	Replace socket fuse; check $+5\text{V}$ and $+12\text{V}$ outputs on power supply.

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Engineering & Maintenance Guide: Monster Eye Arcade Simulator (Pneumatic Motion & Shooting Systems)

Monster Eye (and similar interactive motion shooting simulators such as Jurassic Park Arcade, Pirate's Storm, and Tank! Tank! Tank!) represents an advanced class of arcade engineering. These cabinets blend a 55-inch HD video shooting platform with an active pneumatic motion base powered by compressed air actuators to deliver immersive physical recoil and cabinet movement.

Because these machines combine high-performance computing, optoelectronic gun tracking, and high-pressure pneumatic motion, regular preventive maintenance is critical to prevent mechanical downtime and extend component lifespans.

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Police Action Arcade: Endless Track Rotation & Index Sensor Alignment Guide

In the Police Action redemption game, the playfield features an endless conveyor-style illustrated road carpet that continuously moves beneath the miniature patrol car. To synchronize game cycles, score resets, and motor runtime, the main CPU relies on a Carpet Indexing IR Sensor that reads a dedicated indexing hole punched into the border of the carpet track.

 

When the carpet track keeps spinning endlessly without starting or ending a game cycle, the CPU has failed to detect the track's Home / Index Reference Point.

1. How the Carpet Indexing System Works

Plaintext

  [Motorized Conveyor Roller] ──> [Rotates Illustrated Carpet Track]
                                                 │
                                                 ▼
                       [Indexing Hole Punched in Track Edge Passes Through]
                                                 │
                                                 ▼
               ┌─────────────────────────────────┴─────────────────────────────────┐
               │              [Carpet Home IR Sensor (Photo-Interrupter)]           │
               │                                                                   │
               │   [IR Emitter LED] ─── (Invisible Beam) ───> [Photodiode Receiver]│
               └─────────────────────────────────┬─────────────────────────────────┘
                                                 │
                                                 ▼
                               [Index Signal Pulse Sent to CPU]

1. Continuous Rotation: The drive motor turns the conveyor roller, advancing the printed road carpet.

2. Optical Detection: As the carpet completes a rotation, a pre-punched physical hole on the edge of the carpet passes through a U-shaped IR sensor.

3. Pulse Trigger: The IR beam momentarily passes through the hole, triggering an electrical index pulse ($+5\text{V} \rightarrow 0\text{V}$) to the main CPU, confirming track alignment and cycle completion.

4. Fault Condition (Endless Spinning): If the sensor fails to detect the hole within a set time window, the CPU keeps the motor running indefinitely while searching for the missing home signal.

2. Common Root Causes

• Carpet Track Misalignment (Off-Track): Due to tension imbalance across the conveyor rollers, the carpet track shifts left or right over time. As a result, the physical indexing hole passes outside the IR sensor's optical gap.

• Dirty or Blocked Index Sensor: Dust, rubber belt fragments, or carpet lint cover the IR transmitter LED or photodiode receiver, preventing beam detection even when the hole aligns.

• Damaged or Torn Indexing Hole: If the punched hole becomes elongated, torn, or covered by adhesive tape, light cannot pass cleanly through it.

• Defective Index IR Sensor PCB: Failed photodiode, open current-limiting resistor, or damaged wiring harness to the mainboard.

3. Step-by-Step Adjustment & Repair Procedure

1.Remove Side Housing & Expose Track Edge:Mechanical Access.

Power off the cabinet. Disassemble the side maintenance cover adjacent to the carpet drive rollers to gain clear visual access to the edge of the carpet track and the mounted IR index sensor assembly.

2.Clean the Optical Sensor Lenses:Sensor Lens Cleaning.

Dip a cotton swab in 99% Isopropyl Alcohol (IPA) and clean both the emitter and receiver lenses inside the U-shaped sensor slot. Use compressed air to blow out loose debris from the track guide channel.

3.Manually Align the Carpet Hole to the Sensor Gap:Carpet Alignment.

Rotate the conveyor roller manually by hand until the physical indexing hole on the carpet edge reaches the sensor mounting bracket.

• Check if the hole passes dead-center through the U-shaped sensor gap.

• If the hole is offset to the left or right, loosen the conveyor roller tension bolts and shift the carpet track laterally until the hole aligns perfectly with the sensor contact point.

4.Adjust Conveyor Roller Tension:Tension Calibration.

Equalize the tensioning bolts on both sides of the drive roller. Proper roller balance prevents the carpet track from drifting sideways off its central tracking line during operation.

5.Verify Electrical Signal Toggling:Signal Test.

Apply power to the machine and connect a multimeter set to DC Voltage across Ground ($\text{GND}$) and the sensor's Signal OUT pin:

• Solid Carpet (Beam Blocked): Multimeter reads $+5\text{V DC}$ (or $0\text{V DC}$).

• Hole Centered in Sensor Slot (Beam Clear): Multimeter toggles sharply to $0\text{V DC}$ (or $+5\text{V DC}$).

If voltage does not toggle when the hole passes through, replace the IR sensor PCB module.

6.Perform Cycle Test in Service Mode:Operational Test.

Enter the machine setup menu and initiate a game cycle test. Verify that the carpet track stops or resets smoothy upon detecting the index hole without overshooting or continuously spinning.

Quick Reference Diagnostic Matrix

Symptom	Primary Cause	Action / Resolution
Track spins endlessly without stopping	Hole passing outside sensor path	Re-center carpet track on rollers; align hole to sensor slot.
Track stutters or stops at wrong location	Dirty optical lens or torn hole	Clean sensor with IPA; repair torn hole edge or punch clean new index hole.
Track doesn't spin at all	Blown drive motor fuse or belt snap	Check motor driver voltage ($+12\text{V}/+24\text{V}$) and inspect drive belt.
Error code on display (e.g., Err-Trk)	Index signal missing / Sensor dead	Verify signal toggling with multimeter; replace IR sensor PCB.

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