Fisher & Paykel MR720, MR730, MR480, MR700 technical manual SW5, SPK1, VR1, VR4, VR5, XTAL1

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R20	Resistor 412E 0.25 W 0.5% Metal Film	325040152
R21,
R22, R23, R27, R29	Resistor 820E 0.25 W 0.5% Metal Film	325040136
R25, R35, R40	Resistor 100k 0.25 W 1% Metal Film	325040139
R30	Resistor 220E 0.25 W 1% Metal Film	325040134
R32, R63	Resistor 15k 0.25 W 5%	325040317
R34	Resistor 180k 0.25 W 1% Metal Film	325040125
R37, R38	Resistor 22E 0.25 W 1% Metal Film	325040133
R42	Resistor 2k7 0.25 W 5%	999012720
SW2, SW3, SW4	Push Switch	349040094
SW5	Heater Wire Switch	349040099
SPK1	Audio Transducer CB-12KP	426040015
U2	IC Octal Latch 74LS373	999610004
U3	IC Micro-Processor 8085	999630012
U4	IC Ram I/O Timer 8156	999630003
	or IC Ram I/O Timer 81C55	363040415
U5	IC Hex Inverter 74HC14	363040232
U6, U8	IC 8 Channel Mux. CD4051B	363040125
U7	IC Display Driver MM5451N	363040126
U9	IC 3×2 Channel Mux. CD4053B	999610003
U10	IC Quad Operation Amplifier TL074	363040124
VR1	10k Preset	327041591
VR2, VR3	5k Potentiometer	327041562
VR4	10k Preset Multiturn	327041565
VR5	50k Preset	327041590
XTAL1	Crystal 6.14 Mhz	999820001
	Spacer Heater Wire Switch	693040522

Ref. 185040646 MR730/720/700/480 Technical Manual ¯ Revision F ¯ Issued March 2001

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Contents D E L S MR730 MR720 MR700 MR480 Auckland, New ZealandRevision F changes Section Description of Change National OfficeContents Dual Probe Temperature Test Performance Check MR480Power PCB Harness Connection Diagram Maintenance Schedule B1.1Maintenance Schedule Checklist 10.1Appendix D MR700 Series General Specifications Models MR730/720/700EOH SETTOP RSDOperating Controls and Modes MR700 Series Humidifiers with Version 1.0 SoftwareStandby Button MR700/720/730 only 2 MR720 Version 2.0, 3.0 Software 1 MR700/MR730 ALL Software VERSIONS, MR720 Version 1.0 onlyAlarms and Indicators Version 1.0 and Version 2.0 Software Version 3.0 SoftwareAudio Alarm Circuit Operation Power Line Interrupt Revisions D/F Pcbs Revision H and J Pcbs Calibration For models with Revision D PCB and earlierPage Performance Check Alarms Check MR700/720/730 Dual Probe Temperature Test Replacing revision F or earlier power PCB MR700/720/730 Servicing InformationReplacing revision F or earlier power PCB MR480 Fault Location SCHEMATICS, Part Lists and Mechanical Drawings Power Board Control Board Component Layout Revision F PCB Page This page Left Blank Circuit Diagrams Revision H and J PCB Control PCB Circuit Diagrams Revision H and J PCB Power PCB Circuit Diagrams Revision F PCB Control PCB Circuit Diagrams Revision F PCB Power PCB DSP1, DSP2, DSP3 LED1, LED3LED2,LED4, LED5,LED11 LED6,LED7 LED8,LED9,LED10SW5 SPK1VR1 VR4Fuse fast acting 2 a 20 × 5 mm for 230 999830009 MR480AGM Exploded Diagrams MR480 10.3 MR730/720/700 Mechanical Parts MR720ASU Exploded Diagrams MR730/720/700 Heaterplate Assembly Parts MR730/720/700/480 Page PCB Identification Diagram Power PCB Harness Connection Diagram Product Change History Date Change First Serial Number Comments AffectedAAA Xxxxx Year Model Code Serial NumberAppendix a OFFError Messages A2.3 Integral DisplayEP1 EP2EP3 EP4First Byte Second ByteThird Byte A5.4 Serial Data Interface Connector B1 Maintenance Schedule Appendix BPhotocopy and File in Maintenance Records Electrical Safety Checks as requiredAppendix C Possible cause Action to takeHigh Temperature C1.5 C1.6LED on Check Voltage Rating Of Unit Cleaning instructions Appendix DSetup Notes Appendix EDynamic Test Sequence MR730/720/700 Dynamic Test Procedure MR480