Manuals / Bunn / Kitchen Appliance / Coffee Grinder

Bunn LPG-2, G9WD, G9-2T DBC Control Board Model MHG, SERVICE Cont, Control Board Terminals

Models: FPG-2 G1 FPG G9-2T DBC G9-2 G9 G9WD LPG-2

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Control Board (Model MHG)

SERVICE (Cont.)

Control Board (Model MHG)

FIG 53 CONTROL BOARD

Location:

The control board is located on the component mounting bracket mounted to the grinder base inside the front access panel. The bracket can be removed by loosening the two 8-32 screws securing the bracket to the grinder base.

Test Procedure:

1.Press and hold the upper right hidden button to enter the Programming menus.

2.Scroll to SERVICE TOOLS menu, and press the button under "YES".

3.Press "YES" under TEST OUTPUTS and proceed,through the menus to test the left and right gates, and the grinder motor.

4.Then scroll to the TEST FREQUENCY menu and press the button under "YES".

5.Observe the left, right and center frequency screens, they should read between 124.0 and 126.0 khz.

6.Should any of the outputs or frequency tests fail, first check the continuity of the wiring between the component and the control board. Then test the individual component before replacing the control board.

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove the front access panel.

3.Remove all wires from the control board termi- nals.

4.Remove the bracket and control board by remov- ing the two 8-32 screws securing the bracket to the grinder base.

5.Remove the six 8-32 screws attaching the control board the the component bracket.

6.Remove the six spacers from the old control board and discard the control board.

7.Install the six spacers to the new control board

8.Attach the control board to the component bracket using the six screws previously removed.

9.Position the bracket and control board assembly in the grinder base and secure with the two 8-32 screws.

10.Reconnect the wires to the control board.

	J16	J8
		J8
			J12
	J13
		J7	J9
			J9
	J5
	MOV4
	TH3
	MOV3
	TH2
	MOV2
	TH1
	MOV1
	FIG 54 CONTROL BOARD TERMINALS
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Bunn LPG-2, G9WD, G9-2T DBC, G1, FPG-2 service manual Control Board Model MHG, SERVICE Cont, Control Board Terminals

Contents

GRINDERS BUNN-O-MATIC CORPORATIONSERVICE & REPAIR MANUAL Includes MHG, FPG FPG-2, LPG-2, G1, G2, G3 G2 trifecta, G9, G9WDBUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY CONTENTS INTRODUCTION RECOMMENDED DAILY CLEANINGCAPACITY CHART ADJUSTMENTSG9 WD - Packaging & Shim Removal MUST BE COMPLETED BY AUTHORIZED SERVICE PERSONNEL DO NOT PLUG INSEE INSTRUCTIONS BELOW BEFORE USING housing. FigureBatch Selector Switch Optional Off/On/Start SwitchHopper Selector Switch Dispense TimerModels G1, G2, G3 & G2 trifecta OPERATING CONTROLS ContinuedModel G9 Models LPG, LPG-2EModel G9-2T DBC Power ON/OFF Pad e 100V ModelsOPERATING CONTROLS Continued Model MHG Model FPG-2 DBC Batch Selector SwitchOPERATING CONTROLS Continued Model FPG PAD cProbable Cause TROUBLESHOOTINGProblem RemedyProbable Cause TROUBLESHOOTING contProblem RemedyProbable Cause ProblemRefer to Service - Snubber for re RemedyREMEDY PROBLEMPROBABLE CAUSE TROUBLESHOOTING contComponent Locations SERVICEComponent Access P602CUP SENSOR SWITCH MODEL G2 TRIFECTA SERVICE ContBAG SENSOR SWITCH Models G1, G2, G3 or AC MOTOR AND GRIND CHAMBER SERVICE ContAC MOTOR AND GRIND CHAMBER cont SERVICE ContFIG. 5 GRIND CHAMBER COMPONENTS SERVICE ContAC MOTOR AND GRIND CHAMBER cont SERVICE Cont DC MOTOR AND GRIND CHAMBER - G1MD ONLYDC MOTOR AND GRIND CHAMBER - G1MD ONLY cont SERVICE ContDC MOTOR AND GRIND CHAMBER - G1MD ONLY cont SERVICE Cont12. Slide burr auger rotor/spring assembly and burr FIG. 10 MOTOR REMOVAL MOTOR Models LPG & FPGSERVICE Cont 8. Remove spacer plate 3 and set aside for reas- sembly SERVICE ContMOTOR Models LPG & FPG MOTOR Models LPG & FPG SERVICE Cont21. Discard old motor and housing assembly FIG. 14 DECHAFFER REMOVAL/REPLACEMENT DECHAFFER Models LPG & FPGSERVICE Cont OPTONAL EXTRASERVICE Cont MOTOR Models G9, G9-2, MHGFIG. 15 MOTOR FIG. 16 MOTOR WIRINGNOTE Burrs must be replaced as a set FIG. 17 MOTOR AND GRIND CHAMBERReplace if excessively worn or damaged SERVICE ContWHI/ BLU to Snubber SNUBBER Models G9, G9-2, MHGSERVICE Cont SERVICE Cont Grinder Scale Model G9WD only CALIBRATIONLEVEL 2 FUNCTIONS FIG. 20 CAPACITOR Capacitor Model LPG onlySERVICE Cont RED from Motor-LPG-2E BLK from Start Switch-LPG BLK from Power Cord Circuit Breaker Models LPG, LPG-2E, FPG, FPG-2 DBCSERVICE Cont FIG. 24 HOPPER SELECTOR SWITCH Hopper Selector Switch Model LPG-2E onlySERVICE Cont WHI to OFF/ON/START Switch BLU to Timer P1-4 bluFIG. 26 HOPPER SELECTOR SWITCH Hopper Selector Switch Model G9-2 onlySERVICE Cont WHI/RED timer to P4-6 BLU to SW2 PNK to Intf conn SERVICE ContVIO to timer P1-2 BLK to Cordset BLK to timer P4-1 VIO to timer P1-2 BLK to Cordset WHI/RED timer to P4-6FIG 30 URN/CARAFE SWITCH Urn/Carafe Switch Models G9, G9-2SERVICE Cont ORN to TIMER Batch Selector Switch Model FPGSERVICE Cont FIG 34 POTENTIOMETERS Potentiometer Model FPGSERVICE Cont FIG. 37 RECTIFIER TERMINALS Rectifier Models G1 MD, FPG-2 DBCSERVICE Cont Single set timer shown Relay Early Model G-9SERVICE Cont Multi set timer Urn/Carafe similarRelay Models G1, G2, G3, G2 trifecta SERVICE ContFIG. 41 RELAY TERMINALS RELAY contSERVICE Cont FIG 42 RELAY Relay Models MHG, FPG-2 DBC, Late Model G-9, G9-2, G9-2 DBCSERVICE Cont FIG 43 RELAY TERMINALSSERVICE Cont 5. Inspect the slide plates after reassembly. They must move freelyThe slide plates must always remain flat for proper operation Replace if excessively worn or damaged5. Inspect the slide plates after reassembly. They must move freely Hopper Slide Plates Models MHGSERVICE Cont The slide plates must always remain flat for proper operation7. Check the solenoid for coil action when the control Solenoids Models MHG, FPG-2 DBC, LPG-2, G9-2, G9-2 DBCSERVICE Cont press the Off/On/Start switch to “START” lowerP1061 Timer Model LPG-2ESERVICE Cont Timer Model LPG-2E Timer Models LPG, FPGSERVICE Cont P1748If voltage is present as described, proceed to step Timer Model G9SERVICE Cont SERVICE Cont Timer Model G9-2FIG 52 TIMER Digital TimerFIG 53 CONTROL BOARD Control Board Model MHGSERVICE Cont FIG 54 CONTROL BOARD TERMINALSControl Board Models FPG-2 & G9-2 DBC FIG 55 CONTROL BOARDSERVICE Cont TEST SWITCHES? NO YES PRESS RIGHT HIDDEN TO EXIT NOTHING PRESSED Membrane Switches Model MHG onlySERVICE Cont TEST FREQUENCY? NO YESMembrane Switches Models FPG-2 & G9-2 DBC FIG 58 MEMBRANE SWITCHSERVICE Cont 118.0 kΩ - 118.5 kΩ Across either pair EMI Filter Models FPG & FPG-2SERVICE Cont FIG 62 FUNNEL SENSING COIL Funnel Sensing Coil Models MHG & G9-2 DBCSERVICE Cont FIG 63 FUNNEL SENSING COIL TERMINALSMEMORY BOARD Memory Clock Board Model MHGSERVICE Cont GRN WHI RED BLKFIG 66 DISPLAY BOARD Display Board Model MHGSERVICE Cont To Control Board J8TH1 & MOV2 TRIAC MAP for MHG@ J5-4,5,6 TH2 & MOV3TH2 & MOV2 TRIAC MAP for FPG-2 DBC and G9-2 DBCTH1 & MOV1 TH3 & MOV32 WIRE SINGLE PHASE 50/60 HZ SCHEMATIC WIRING DIAGRAMWIRING DIAGRAMS G9-2 DBC, G9-2T DBC W/SMART FUNNEL2 WIRE SINGLE PHASE 50/60 HZ SCHEMATIC WIRING DIAGRAMWIRING DIAGRAMS G9-2 DBC, G9-2T DBC W/SMART FUNNELWIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM G9-2TB DBC W/SMART FUNNEL100 VOLTS AC 2 WIRE SINGLE PHASE 50 HZ SCHEMATIC WIRING DIAGRAM MHG 2 WIRE SINGLE PHASE50/60 HZ WIRING DIAGRAMS100 VOLTS AC, 120 VOLTS AC 240 VOLTS AC 2 WIRE + Gnd SCHEMATIC WIRING DIAGRAM MHG with WD CBAWIRING DIAGRAMS SINGLE PHASE, 50/60HZWIRING DIAGRAMS SCHEMATIC WIRING DIAGRAMLPG-2E, LPGB-2E 100 VOLTS AC 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZWIRING DIAGRAMS WIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM LPG 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ230 VOLTS AC 2 WIRE SINGLE PHASE 50/60 HZ WIRING DIAGRAMS SCHEMATIC WIRING DIAGRAMLPG-A WIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM LPG W/Capacitor 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZWIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM LPG-B 100 VOLTS AC 2 WIRE SINGLE PHASE 50-60 HZ2 WIRE + GRD SINGLE PHASE 50/60 HZ WIRING DIAGRAMSSCHEMATIC WIRING DIAGRAM G1, G2, G3 & G2 trifecta 100 VOLT AC 120 VOLT AC 230 VOLT AC 240 VOLT AC120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ SCHEMATIC WIRING DIAGRAM G9SCHEMATIC WIRING DIAGRAM G9-URN/CARAFE 2 WIREWIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM G9A HD50 HZ SCHEMATIC WIRING DIAGRAM G9WD-RHWIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM G9SCHEMATIC WIRING DIAGRAM G9 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZWIRING DIAGRAMS 230 VOLTS AC 2 WIRE SINGLE PHASE 50 HZSCHEMATICWIRINGDIAGRAMG9-2A HD WIRING DIAGRAMS 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ FPGAWIRING DIAGRAMS 230 VOLTS AC 2 WIRE SINGLE PHASE 50/60 HZFPG-2 DBC, FPGB-2 DBC 100 VOLTS AC 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZWIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM50 HZ FPG-2A DBC230 VOLTS AC SCHEMATIC WIRING DIAGRAM