Lesson 1Electronic control and payout logic: hopper drivers, fuses, coin counters and PCB rolesExplains how slot electronics direct and watch hopper payouts. Covers driver circuits, fuses, relays, coin counters, and PCB logic, including enable lines, payout pulses, fault spotting, and link to main game CPU.
Hopper driver outputs and enable signalsFuse protection and overcurrent behaviourCoin counter inputs and pulse shapingMain logic PCB payout control flowTimeouts, error flags, and lockup statesLesson 2Post-repair verification: payout simulation tests, multi-denomination payout runs, audit of meter and event logsDescribes verifying hopper fixes before machine returns to use. Includes payout mock-ups, multi-denom test runs, timing checks, and meter/event log reviews to affirm right accounting and alerts.
Single-denom payout mock-upsMulti-denom mixed payout runsVerifying coin count vs logged pulsesChecking meters, audits, and event logsDocumenting test outcomes and approvalLesson 3Inspection and mechanical test plan: clearing jams, checking coin path alignment, wear inspection, bearing and motor checksSets a structured mechanical test plan for hoppers. Covers safe disassembly, jam clearing, coin path lining checks, wear looks, and assessing bearings, shafts, motors under load to avoid repeat breakdowns.
Safe hopper removal and bench setupSteps for clearing coin jamsChecking coin path and chute liningInspecting gates, discs, agitators for wearBearing, shaft, motor free-spin testsLesson 4Causes of false "Hopper Empty/Jam" indications: wiring, sensor occlusion, stuck actuators, insufficient hopper voltageLooks at reasons for false hopper empty or jam warnings. Covers wiring faults, sensor blocks, stuck actuators, low voltage, spotty connectors, plus aimed tests to confirm and fix each mode.
Spotting false empty and jam signsFinding broken or shorted sensor wiringDetecting dirty or blocked sensor opticsIdentifying stuck levers and actuatorsLow-voltage and brownout related alarmsLesson 5Sensor types for coin detection and hopper level: optical interrupters, IR, micro-switches, weight/floor sensorsCovers sensors for coin spotting and hopper level. Explains optical interrupters, IR reflective sensors, microswitch actuators, weight or floor sensors, including mounting, lining, failure modes, cleaning needs.
Optical interrupter theory and liningIR reflective coin spotting techniquesMicroswitch actuators and lever tweaksWeight and floor sensor level spottingCleaning and shielding sensor windowsLesson 6Calibration and configuration: hopper pulse counts, coin denomination mapping, coin size adjustments and software parameter updatesExplains calibrating and setting hopper work. Includes setting pulses per coin, mapping denoms, tweaking for coin size, updating software params while keeping regulatory compliance.
Setting hopper pulses per paid coinMapping denoms to hopper outputsTweaking for coin diameter and thicknessUpdating game software payout paramsRecording calibration data for auditsLesson 7Electrical diagnostic steps: voltage and current measurements, driver board tests, connector and harness checksGives step-wise electrical diagnostics for hopper circuits. Covers voltage/current checks, driver board testing, connector looks, harness continuity, using diagrams to trace payout signals.
Safety and isolation before measurementsMeasuring hopper supply voltage and rippleChecking motor current and stall conditionsDriver board output and component testsConnector, harness, continuity checksLesson 8Coin hopper types and internal mechanisms: motor-driven, stepper, disc, star wheel designsExplores key hopper designs and coin movement, separation, counting. Covers motor types, drive trains, discs, star wheels, coin path shapes, and mechanical impacts on speed, accuracy, reliability.
Motor-driven hopper structure overviewStepper motor control and indexing behaviourDisc and star wheel coin transport designsCoin path shape and singulation featuresWear spots in gates, discs, agitatorsLesson 9Causes of wrong payouts: sensor misreads, mechanical wear, coin jams, counterfeit/size variance, software countersAnalyses usual wrong payout causes. Discusses sensor errors, mechanical wear, jams, fake or off-size coins, software counter issues, plus ways to isolate if faults are mechanical, electrical, or logical.
Signs of overpay and underpay eventsSensor errors and missed coin pulsesMechanical wear, drag, partial jamsEffects of off-size or fake coinsSoftware counter and setup errors
