Lesson 1Electronic control and payout logic: hopper drivers, fuses, coin counters and PCB rolesExplains how slot electronics direct and oversee hopper payouts. Covers driver circuits, fuses, relays, coin counters, and PCB logic, including enable signals, payout pulses, fault detection, and links to the main 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 logsGuides verification of hopper fixes before machine redeployment. Features payout simulations, multi-denomination tests, timing reviews, and meter/event log audits to ensure accurate accounting and alerts.
Single-denomination payout simulationsMulti-denomination mixed payout runsVerifying coin count versus pulses loggedChecking meters, audits, and event logsDocumenting test results and sign-offLesson 3Inspection and mechanical test plan: clearing jams, checking coin path alignment, wear inspection, bearing and motor checksSets out a methodical mechanical test plan for hoppers. Includes safe disassembly, jam removal, coin path alignment, wear checks, and load testing of bearings, shafts, and motors to avoid field repeats.
Safe removal and bench setup of hopperProcedures for clearing coin jamsChecking coin path and chute alignmentInspecting gates, discs, and agitators for wearBearing, shaft, and motor free-spin testsLesson 4Causes of false "Hopper Empty/Jam" indications: wiring, sensor occlusion, stuck actuators, insufficient hopper voltageInvestigates false hopper empty or jam alerts. Addresses wiring issues, sensor blockages, stuck actuators, low voltage, and loose connectors, with specific tests to identify and fix each problem.
Recognizing false empty and jam symptomsFinding broken or shorted sensor wiringDetecting dirty or occluded 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 sensorsReviews sensors for coin detection and hopper levels. Explains optical interrupters, IR reflective types, microswitch actuators, and weight/floor sensors, covering mounting, alignment, failures, and cleaning.
Optical interrupter theory and alignmentIR reflective coin detection techniquesMicroswitch actuators and lever adjustmentsWeight and floor sensor level detectionCleaning and protecting sensor windowsLesson 6Calibration and configuration: hopper pulse counts, coin denomination mapping, coin size adjustments and software parameter updatesGuides hopper calibration and setup. Involves setting pulses per coin, denomination mapping, size adjustments, and software updates while adhering to Namibian regulatory standards.
Setting hopper pulses per paid coinMapping denominations to hopper outputsAdjusting for coin diameter and thicknessUpdating game software payout parametersRecording calibration data for auditsLesson 7Electrical diagnostic steps: voltage and current measurements, driver board tests, connector and harness checksOutlines step-by-step electrical diagnostics for hopper circuits. Includes voltage/current checks, driver board tests, connector inspections, harness continuity, and schematic use for signal tracing.
Safety and isolation before measurementsMeasuring hopper supply voltage and rippleChecking motor current and stall conditionsDriver board output and component testsConnector, harness, and continuity checksLesson 8Coin hopper types and internal mechanisms: motor-driven, stepper, disc, star wheel designsExamines key hopper designs and coin movement, separation, counting. Covers motor types, drive systems, discs, star wheels, path geometry, and how mechanics impact speed, accuracy, reliability.
Motor-driven hopper architecture overviewStepper motor control and indexing behaviourDisc and star wheel coin transport designsCoin path geometry and singulation featuresWear points in gates, discs, and agitatorsLesson 9Causes of wrong payouts: sensor misreads, mechanical wear, coin jams, counterfeit/size variance, software countersAnalyses reasons for incorrect payouts. Discusses sensor errors, wear, jams, fake or mismatched coins, software issues, and ways to determine if faults are mechanical, electrical, or logical.
Symptoms of overpay and underpay eventsSensor misreads and missed coin pulsesMechanical wear, drag, and partial jamsEffects of off-size or counterfeit coinsSoftware counter and configuration errors
