HP 78670, 78671 Service manual

					TABLE OF CONTENTS
					Models 78670A/78671A
						78670-1
				TABLE OF CONTENTS
1	GENERAL
	1.1	INTRODUCTION				1-1
	1.2	IDENTIFICATION				1-1
	1.3	INQUIRES				1-1
	1.4	DESCRIPTION				1-2
		1.4.1	General			1-2
		1.4.2	Model 78670A Defibrillator/Monitor with Annotating Recorder			. . 1-3
		1.4.3	Model	78671A Defibrillator/Monitor/Recorder		1-4
		1.4.4	Monitor			1-4
		1.4.5	Recorder			1-4
		1.4.6	Defibrillator Output		Information	1-5
		1.4.7	Self Diagnostics			1-5
		1.4.8	Defibrillator Charge Time			1-6
		1.4.9	Paddles			1-6
	1.5	MODEL	78670A/78671A OPERATING CONTROLS			1-7
	1.6	OPTIONS				1-13
	1.7	GENERAL INSTALLATION INFORMATION				1-13
		1.7.1	Initial	Inspection		1-13
		1.7.2	Claims	and Repackaging		1-13
	1.8	PREPARING FOR OPERATION				1-14
	1.9	ENVIRONMENT				1-14
		1.9.1	Operating Environment			1-14
		1.9.2	Storage	and Shipment	Environment	1-14
	1.10	POWER	REQUIREMENTS (MODEL		78668A POWER BASE)	1-15

1.11INSTRUMENT GROUNDING AND POWER CORD SETS (78668A POWER BASE) . . . 1-15

1.12	MOUNTING	(78668A POWER BASE)	1-15
1.13	OPTIONAL	ACCESSORY CABLES	1-17
2 THEORY OF OPERATION
2.1	INTRODUCTION		2-1
2.2	SYSTEM OVERVIEW		2-1

	2.2.1	ECG	Switch	Board and Analog Board	2-1
	2.2.2	Digital ECG		Circuits	2-2
	2.2.3	CRT Timing Circuit and Memory			2-2
	2.2.4	CRT Driver Circuit			2-2
	2.2.5	Heart	Rate Circuit		2-2
	2.2.6	Real	Time Clock		2-2
	2.2.7	Recorder Circuit			2-2
	2.2.8	Defibrillator Control			2-3
	2.2.9	Defibrillator H.V. Circuits			2-3
	2.2.10	Low Voltage and CRT Power Supply			2-4
	2.2.11	Battery and		Battery Relay	2-4
	2.2.12	Quick-Mount Power Base 78668A			2-4
	2.2.13	Spare Battery Charger 78669A			2-4
2.3	DETAILED THEORY OF			OPERATION	2-7
	2.3.1	ECG Switch Board 78670-60215			2-7
	2.3.1.1		ECG Source Switch		2-7
	2.3.1.2		Protective Circuitry		2-7
	2.3.2	ECG Analog Board 78670-60155			2-7
	2.3.2.1		Protection Circuitry		2-7
	2.3.2.2		Differential Amplifier		2-8
	2.3.2.3		Right	Leg Drive (RLD)	2-8

TABLE OF CONTENTS

Models 78670A/78671A

78670-1
2.3.2.4		ECG Leads		Off	Indicator			2-9
2.3.2.5		Chopper Modem and Power Supply						2-10
2.3.2.6		EMI Rejection						2-10
2.3.2.7		Chopper Driver						2-11
2.3.2.8		Baseline Restore						2-11
2.3.2.9		Fixed	Gain	Stage				2-12
2.3.2.10		Zero Offset			Potentiometer			2-12
2.3.2.11		Calibration			Potentiometer			2-12
2.3.2.12		Analog Power Supply						2-12
2.3.2.13		Electromagnetic Interference					Rejection	2-12
2.3.2.14		Paddle Contact				(PC)		2-13
2.3.3	ECG Digital		Circuit		Board			2-14
2.3.3.1		50/60 Hz Notch				Filter		2-14
2.3.3.2		Auto Gain Attenuator						2-14
2.3.3.3		Manual Variable				Gain		2-14
2.3.3.4		Voltage to Frequency Converter (V/F)						2-15
2.3.3.5		Auto	Bias					2-15
2.3.3.6		Microprocessor						2-15
2.3.4	Microprocessor Reset					"Tickle" Circuit		2-16
2.3.4.1		Beeper						2-17
2.3.4.2		Electromagnetic				Interference	Rejection	2-17
2.3.5	Memory/Display Board					78660-60170		2-17
2.3.5.1		Functional		Overview				2-17
2.3.5.2		Oscillator		and		Johnson Counter		2-19
2.3.5.3		1025	Counter					2-19
2.3.5.4		Delay ECG Gate (1026 count)						2-19
2.3.5.5		Address Counter						2-20	-^
2.3.5.6		RAM Read-Write						2-20	^
2.3.5.7		Bidirectional			Data Bus			2-20
2.3.5.8		Digital to Analog Converter (D/A)						2-20
2.3.5.9		Sample and Hold						2-20
2.3.5.10		Ramp Generator						2-21
2.3.5.11		Analog Multiplexer (MUX)						2-22
2.3.6	Deflection		Board	78660-60180				2-22
2.3.6.1		Vertical Amplifier						2-22
2.3.6.2		Horizontal		Amplifier				2-23
2.3.6.3		Intensity		Driver				2-23
2.3.7	Clock/Heart		Rate Board 78660-60260					2-24
2.3.7.1		Heart	Rate	Circuit				2-24
2.3.7.2		Heart	Rate	Digital Display				2-24
2.3.7.3		Language Option				Selector		2-24
2.3.7.4		Heart	Rate	Alarm Switch				2-24
2.3.7.5		Clock	Circuit					2-25
2.3.7.6		Voltage Reference						2-27
2.3.7.7		Clock	Battery					2-27
2.3.7.8		Clock	Protection					2-27
2.3.7.9		Clock	Crystal					. . . 2-27
2.3.8	Recorder Control			Board 78660-60200				2-27
2.3.8.1		ECG Monitor to Recorder Signal						2-27
2.3.8.2		ECG Memory to Recorder Signal						2-27
2.3.8.3		Recorder Movement and Stylus Heat Control						2-28
2.3.8.4		Recorder/Signal				Control		2-28
2.3.8.5		ECG Signal Amplitude Limiting and Switching						2-28
2.3.8.6		Microprocessor				Reset (Tickle)	Circuit	2-29

2.3.8.7

Print Head Driver

2-30

						TABLE OF CONTENTS
						Models 78670A/78671A
						78670-1
2.3.8.8		Print	Head Protective Circuit			2-31
2.3.8.9		Input/Output		Lines		2-31
2.3.9	Defibrillator Control Circuit Board 78670-60195					2-32
2.3.9.1		Microprocessor				2-32
2.3.9.2		"Ticke!" Reset Circuit				2-32
2.3.9.3		LCD Drivers and Recorder Data				2-33
2.3.9.4		Analog Multiplexer and A/D Converter				2-34
2.3.9.5		I/O Expander				2-34
2.3.9.6		Relay	Drivers			2-34
2.3.9.7		Charge	Done Tone			2-34
2.3.9.8		Battery LED		Driver		2-34
2.3.9.9		Paddle	Contact		Chopper	2-35
2.3.9.10		Monitoring		the HV Capacitor		2-37
2.3.9.11		Charge and Discharge Cycle				2-37
2.3.9.12		Cardioversion				2-38
2.3.9.13		Software Safety Features				2-38
2.3.10	Defibrillator High				Voltage Section	2-38
2.3.10.1		General				2-38
2.3.10.2		Power Circuits				2-39
2.3.11	Pulse Width		Modulator			2-39
2.3.11.1		PWM Shutdown				2-40
2.3.11.2		Soft Start				2-40
2.3.12	HV Defibrillator			Inverter Circuit		2-40
2.3.12.1		HV Monitor		Circuit		2-41
2.3.12.2		Patient Relay			Circuit	2-42
2.3.12.3		Peak	Current		Detector Circuit	2-43
2.3.12.4		Safety Relay			Circuit	2-44
2.3.12.5		5.4 V Reference/Low Battery Shutdown				2-44
2.3.13	Low Voltage		Power Supply Board 78660-60110			2-46

2.3.13.1Pulse Width Modulator (PWM) Internal Circuits .... 2-46

2.3.13.2	External PWM		Circuits		2-48
2.3.13.3	5V.	Supply Voltage		Regulation	2-50
2.3.13.4	CRT	Supplies	(+5000	and +200 volts)	2-52

2.3.13.5+ and -15 Volt Supplies (Refer to Figure 2-62) .... 2-53

	2.3.13.6		+ and -12 Volt Supplies				2-53
	2.3.13.7		Noise Filtering				2-53
	2.3.14	Service		Switch			2-53
	2.3.15	Annotation Printout					2-54
CHECKS AND ADJUSTMENTS
3.1	INTRODUCTION						3-1
3.2	LEVEL	II PERFORMANCE, SAFETY AND				MAINTENANCE CHECKS	3-1
	3.2.1	Test Equipment					3-1
	3.2.2	Functional		Performance Testing			3-4
	3.2.2.1		Energy Accuracy				3-4
	3.2.2.2		Self Testing Accuracy				3-5
	3.2.2.3		Defibrillator Capacitor Charge Time				3-5
	3.2.2.4		Synchronizer			'.	3-5
	3.2.2.5		ECG	Amplifier Noise			3-6
	3.2.2.6		ECG	Amplifier Gain			3-6
	3.2.2.7		Heart Rate Accuracy and Alarm				3-7
	3.2.2.8		Paddle Contact Indicator (PCI) Test				3-8
	3.2.3	Safety	and	Maintenance Checks			3-8
	3.2.3.1		Preliminary		Safety Checks		3-8
	3.2.3.2		Power Cord		to Chassis	Ground Resistance Check	3-9

///

TABLE OF CONTENTS

Models 78670A/78671A

78670-1

3.2.3.3Paddle Leakage Current (Source Leakage) to Ground. . . .3-11

3.2.3.4

Paddle Leakage Current (Sink Current) with 115 Volts App 3-12 /r^l

3.2.3.5Patient Lead Leakage Current (Source Leakage) to Ground. 3-14

3.2.3.6

Leakage Current Between Patient Leads Check

3-15

3.2.3.7Patient Lead Leakage Current (Sink Current) with 115 Vol 3-17

	3.2.3.8		Battery Capacity Check	3-17
3.3	ADJUSTMENTS			3-18
	3.3.1	Equipment Required		3-18
	3.3.2	Related Adjustments		3-18
	3.3.3	Adjustment Location		3-18
	3.3.4	Paddle Contact Indicator Adjustment		3-20
	3.3.5	Low Voltage Power Supply Adjustments		3-21
	3.3.6	ECG	Cal Adjustment	3-22
	3.3.7	ECG Amplifier Baseline Offset Adjustment		3-24
	3.3.8	CRT	Display Adjustments	3-25
	3.3.9	Real Time Clock/V REF ADJUSTMENT		3-26
	3.3.10	Real Time Clock/Heart Rate Frequency Adjustment		3-27
	3.3.11	Common Mode Rejection Notch Filter Switches		3-28

3.3.12Voltage Reference, Defibrillator Charger Circuit Board . . . 3-29

3.3.13 Defibrillator Output Energy Calibration 3-30

	3.3.14	High Voltage Charge Time Adjust			3-31
	3.3.15	Self Test Accuracy		Adjust	3-32
	3.3.16	Recorder Pen Heat		Adjust	3-33
	3.3.17	Recorder Stylus Contact Pressure Adjustment			3-34
	3.3.18	Recorder Pen Positioning			3-35
	3.3.19	Recorder Print Head Adjustment			3-36
	3.3.20	Setting Real Time Clock			3-37
3.4	SPECIFICATION CHECKS				3-39
	3.4.1	ECG	Amplifier/Heart	Rate Section	3-39
	3.4.1.1		Test Equipment		3-39
	3.4.1.2		ECG Amplifier Gain - Manual Control		3-40
	3.4.1.3		ECG Amplifier Gain - Auto Mode		3-41
	3.4.1.4		Baseline Offset - ECG Lead Input		3-42
	3.4.1.5		Baseline Offset - Paddles Input		3-42
	3.4.1.6		ECG Amplifier Frequency Response, Leads Input		3-43

3.4.1.7ECG Amplifier Frequency Response Check - Paddle Input . 3-43

3.4.1.8		Input Offset Tolerance (DC) - ECG Lead Input		3-44
3.4.1.9		Input Offset Tolerance (DC) - Paddle input		3-45
3.4.1.10		ECG Amplifier Noise, Leads Input		3-46
3.4.1.11		ECG Amplifier Noise, Paddles Input		3-47
3.4.1.12		ECG Calibration Check		3-48
3.4.1.13		Common Mode Rejection (CMR) Leads Source		3-49
3.4.1.14		Common Mode Rejection (CMR), Paddles Source		3-50
3.4.1.15		Heart	Rate Accuracy	3-51
3.4.1.16		Heart	Rate Alarm Limits	3-51
3.4.2	Recorder Section			3-52
3.4.2.1		Test Equipment Requirements		3-52
3.4.2.2		Recorder Frequency Response		3-53

3.4.2.3Recorder Gain Accuracy, Linearity, and Overshoot . . . 3-53

3.4.2.4	Recorder Chart Speed	3-54
3.4.3 Defibrillator Section		3-54
3.4.3.1	Test Equipment	3-54
3.4.3.2	Energy Accuracy	3-55
3.4.3.3	Delivered Energy Waveform Information	3-56

iv

							TABLE OF CONTENTS
							Models 78670A/78671A
							78670-1
	3.4.3.4		Self Testing Accuracy				3-56
	3.4.3.5		Defibrillator Capacitor Charge Time				3-57
	3.4.4	Synchronizer Section					3.57
	3.4.4.1		Test Equipment				3-57
	3.4.4.2		R-wave/Sync Pulse/Discharge Delay				3-58
	3.4.5	Paddle		Contact Indicator			3-61
	3.4.5.1		Test Equipment				3-61
	3.4.5.2		Paddle Contact Indicator Test				3-61
MECHANICAL DISASSEMBLY/ASSEMBLY
4.0	PRELIMINARY INSTRUCTIONS						4-0
4.1	MECHANICAL		DISASSEMBLY				4-1
4.2	MECHANICAL		REASSEMBLY				4-2
	4.2.1	Replacing the Low Voltage Power Supply Board					4-4
	4.2.2	Paddle/Cable Assembly Replacement					4-5
	4.2.3	Replacing the Defibrillator H.V. Board					4-8
	4.2.4	Replacing H.V. Capacitor					4-9
	4.2.5	Safety		Relay	Replacement		4-10
	4.2.6	Patient		Relay	Replacement		4-11
	4.2.7	Circuit		Board Replacement			4_12
	4.2.8	Recorder Board Assembly Replacement					4-12
	4.2.9	ECG	Analog Board Replacement				4-13
	4.2.10	Switchboard Replacement					4-13
	4.2.11	CRT	Replacement				4-13
	4.2.12	Front		Panel Removal			4-14
	4.2.13	Fuse Replacement					4-16
	4.2.14	Knob Removal					4-16
	4.2.15	ECG Size, Recorder, Alarm and ECG Source Knobs					4-16
	4.2.16	Knob Replacement					4-17
	4.2.17	Energy		Selection Knob			4-17
	4.2.18	Recorder Replacement					4-18
	4.2.19	Printhead Replacement					4-20
	4.2.20	Printhead Adjustment					4-21
	4.2.21	Assembly Installation					4-22
	4.2.22	QRS	Beeper Speaker Replacement				4-22
	4.2.23	"Paddles in Place" Reed Switch Replacement					4-23
	4.2.24	ENERGY		SELECTOR Switch Replacement			4-24
	4.2.25	Other Components Mounted on the Flex Circuit					4.94
	4.2.26	SYNC/DEFIB Switch Replacement					4.35
	4.2.27	Flex Circuit Replacement ...					4_26
	4.2.28	Liquid Crystal Display				Replacement	4-26
	4.2.29	LCD	Replacement				4-28
	4.2.30	LED	Replacement, Front			Panel	4_29
4.3	RECHARGEABLE NICKEL				CADMIUM BATTERY - Bl		4.29
	4.3.1	General		Description			4_29
	4.3.2	Charge Retention					4_29
	4.3.3	Charging					4_30
	4.3.4	Voltage Depression (Memory)					4_30
	4.3.5	What To Do About It					4.30
	4.3.6	Cell	Reversal				4_3q
	4.3.7	Battery		Replacement			4_31
	4.3.8	Storage		of Nickel Cadmium Batteries			a 01

4.4

RECORDER STYLUS REPLACEMENT

J^f

TABLE OF CONTENTS

Models 78670A/78671A

78670-1

5 TROUBLESHOOTING

	5.1	INTRODUCTION						5-1
	5.2	BOARD	LEVEL					5-1
		5.2.1	System Problems					5-2
		5.2.2	Defibrillator H.V. Problems					5-2
		5.2.3	LCD Readout Problems					5-4
		5.2.4	ERROR Messages on LCD					5-5
		5.2.5	CRT	Display		Problems		5-6
		5.2.6	Recorder Problems					5-7
		5.2.7	Indicator Malfunction					5-9
		5.2.8	ECG	Signal		Problems		5-10
		5.2.9	Real	Time	Clock Problems			5-11
		5.2.10	Control Problems					5-11
		5.2.11	Service Mode					5-12
		5.2.12	Battery Power Base Problems					5-12
	5.3	COMPONENT		LEVEL				5-13
		5.3.1	ECG Monitor					5-14
		5.3.2	ECG	Analog		Board (A3)		5-14
		5.3.2.1		ECG	Section			5-15
		5.3.2.2		ECG Differential Amplifier Test Procedure				5-16
		5.3.2.3		Bias Voltage Check Procedure on Differential Amplifier				5-16
		5.3.2.4		Paddle Contact			Indicator	5-17
		5.3.3	Digital ECG Board (A-4)					5-17
		5.3.4	Memory Board (A5)					5-22
		5.3.5	Deflection			Board (A6)		5-25
		5.3.6	Clock/Heart			Rate Board (A7)		5-26
		5.3.7	Recorder Board (A8)					5-30
		5.3.7.1		Annotation (78670A Only)				5-31
		5.3.7.2		CRT	Digits			5-34
		5.3.7.3		Switch Functions				5-36
		5.3.7.4		Recorder				5-37
		5.3.8	Defibrillator Control				Board (A10)	5-39
		5.3.8.1		Error Messages				5-39
		5.3.8.2		LCD	Display			5-40
		5.3.8.3		Paddle Contact			Indicator	5-41
		5.3.9	Defibrillator Charger Board (A-ll)					5-41
		5.3.10	Pulse Width Modulator (A12-U1)					5-55
6	REPLACEABLE PARTS AND SCHEMATIC DIAGRAMS
	6.1	INTRODUCTION						6-1
	6.2	REFERENCE		DESIGNATIONS				6-1
	6.3	ORDERING INFORMATION						6-2
7	ACCESSORIES
	7.1	78668A Quick-Mount Power Base						7-1
		7.1.1	Theory of Operation - AC Circuits					7-1
		7.1.2	Regulated		Voltage Circuit			7-1
		7.1.3	Raw Voltage and Battery Charge Circuit					7-2
		7.1.4	Low	Line Voltage Circuit				7-2
		7.1.4.1		Disassembly				7-2
		7.1.5	Troubleshooting Power Base					7-3
	7.2	BATTERY CHARGER			78669A			7-9

VI

													TABLE OF CONTENTS
													Models 78670A/78671A
													78670-1
	7.2.1		Description										7-9
	7.2.2		Charging										7-9
	7.2.3		Indicator Lamps										7-9
	7.2.4		Battery Charger Theory of Operation										7-10
	7.2.5		Current					Source					7-10
	7.2.6		Circuit					Voltage			Regulator		7-10
	7.2.7		Timing				Oscillator						.7-11
	7.2.8		Clock				Gate						7-11
	7.2.9		Divide				By 2048 and Divide By 4096 Counters						7-11
	7.2.10			Counter Reset							Gate		7-11
	7.2.11			Maintenance									7-12
	7.2.12			Disassembly									7-12
	7.2.13			Troubleshooting Battery Charger									7-15
7.3	RECHARGEABLE							NICKEL CADMIUM BATTERY - Bl					7-19
	7.3.1			General				Description					7-19
	7.3.2			Charge				Retention					7_19
	7.3.3			Charging									7-19
	7.3.4			Voltage				Depression (Memory)					7-20
	7.3.6			Cell		Reversal							7-20
	7.3.7			Battery Replacement 78660-60401									7-20
	7.3.8			Storage				of		Nickel Cadmium Batteries			7-21
OPTIONS													8-1
										LIST OF ILLUSTRATIONS
FIGURE											TITLE		PAGE
1-1	Front		View Model						78670A/7861A Defibrillator				1-0
1-2	Defibrillator Waveform												1-5
1-3A	Paddles												1-6
1-3B	Paddle		Contact					Indicator					1-6
1-4	Model		78670A			and			78671A Controls				1-7
1-5	Accessories				Storage					Compartment			1-9
1-6	Non-Fade			Display									1-9
1-7	Date	Time		Annotation									1-11
1-8	Stored		and Delivered							Energy Annotation			1-11
1-9	Heart	Rate			and Marker Annotation								1-11
1-10	Rear	Panel,			Model				78670A and			78671A	1-12
2-1	Model	78670A Block							Diaqram				2-1
2-2	Detailed			Block			Diagram,				Model	78670A Foldout	. 2 - 6
2-3	ECG Source				Switch								2-7
2-4	Protective				Circuitry								2-8
2-5	Differential Amplifier												2-8
2-6	Right	Leg		Drive				Circuit					2-9
2-7	ECG Leads			Off		Indicator					Circuit		2-9
2-8	Chopper Modem					and Power Supply							2-10
2-9	Chopper		Driver Circuit										2-11
2-10	Baseline			Restore				Circuit					2-11
2-11A Fixed Gain Stage													2-12
2-11S	Paddle		Contact										2-13

vii

TABLE OF CONTENTS

Models 78670A/78671A

78670-1

2-12	50/60 Hz Notch Filter Circuit				2-14
2-13	Auto Gain Attenuator				2-15
2-14	Voltage to Frequency			Converter	2-16
2-15	Auto Bias		Circuit		2-16
2-16	Microprocessor Reset			(Tickle) Circuit	2-16
2-17	CRT Display and Blanking Timing				2-17
2-18A Read/Write Sequence Delay Mode					2-18
2-18B Read/Write Sequence Fixed Trace Mode					2-18
2-19	Erase Bar Generator				2-19
2-20	Oscillator and Johnson Counter				2-19
2-21	1025 and 1026 Count Circuit				2-20
2-22A	Memory to CRT Circuit Block Diagram				2-21
2-22B	Memory to Recorder and Output Block Diagram				2-21
2-23	Ramp Generator				2-21
2-24	Multiplex		Driver Timing		2-22
2-25	Deflection Amplifier Block Diagram				2-22
2-26	CRT Intensity Driver				2-23
2-27	CRT Blanking Circuit				2-23
2-28	Clock/Heart Rate Board Block Diagram				. 2-24
2-29	Clock	Circuit			2-25
2-30	Timing	Diagram			2-25
2-31	Clock	Circuit Read Cycle Timing			2-26
2-32	Clock Circuit Time Set Cycle Timing				2-26
2-33	Recorder Control Circuit				2-28
2-34	Recorder ECG Amplitude Limit Circuit				2-28
2-35	Microprocessor Reset			(Tickle) Circuit	2-29
2-36	Microprocessor Reset Oscillator Equivalent Circuit				2-29
2-37	Microprocessor Reset			Pulses	2-29
2-38	Printhead		Driver Circuit		2-30
2-39	A8-U2 Drive Signal				2-31
2-40	Printhead		Protection	Circuit	2-31
2-41	"Ticker		Reset Circuit		2-32
2-42	LCD Timing				2-33
2-43	Charge Done Tone				2-35
2-44	Paddle Contact Chopper				2-35
2-45	HV Capacitor Monitoring Circuit				2-37
2-46	Pulse Width Modulator				2-39
2-47	PWM Shutdown				2-40
2-48	HV Defibrillator Inverter Circuit				2-41
2-49	HV Monitor Circuit,				2-42
2-50	Patient		Relay Circuit		2-43
2-51	Peak Dicharge Current Detector Circuit				2-44
2-52	Safety Relay Circuit				2-45
2-53	5.4 V Reference and Low Battery Shutdown Circuit				2-45
5-54	Low Voltage Power Supply Block Diagram				2-46
2-55	Pulse Width Modulator Block Diagram				2-47
2-56	Pulse Width Modulator External Circuit				2-48
2-57	Flyback		Driver Circuit		2-49
2-58	Low Battery Detector Circuit				2-50
2-59	Low Voltage Supply DC Output Circuit				2-51
2-60	Flyback Transformer CRT Supply Waveform				2-52
2-61	CRT Supply Regulator				2-52
3-0	Circuit Board Locator				3-0
3-1	Energy Accuracy Test			Setup	3-4
3-2	Five	Gain Stages of AUTO			3-7

via

						TABLE OF CONTENTS
						Models 78670A178671A
						78670-1
3 - 3	Heart Rate Accuracy and Alarm					3-7
3-4	Power Cord to Chassis Ground Resistance Check					3-9
3-5	Test Connections to Paddles					3-10
3-6	Paddle Leakage Current to Ground					3-10
3-7A	Paddle Leakage Test with 115V Applied					3-11
3-7B	Paddle Leakage Test with 115V Applied					3-12
3-8A	Patient Lead Leakage Current to Ground Test					3-13
3-8B Patient Lead Leakage Current to Ground Test						3-13
3-9A	Leakage Current Between Patient Leads Test					3-14
3-9B	Leakage Current Between Patient Leads Test					3-15
3-10A	Patient Lead Leakage Current Test with 115 V Applied					3-16
3-10B	Patient	Lead	Leakage Current Test with 115 V Applied			3-16
3-11 Test Setup for Battery Capacity Check						3-17
3-12A	ECG Amplifier Gain and Frequency Response Test Setup					3-40
3-12B	ECG Amplifier Gain				and Frequency Response Test Setup	3-40
3-13	ECG Amplifier Baseline Offset (Leads)					3-42
3-14	ECG Amplifier Baseline Offset (Paddles)					3-42
3-15	ECG Amplifier Frequency Response Setup (Paddles)					3-44
3-16	Input Offset Tolerance (DC) Leads Test Setup					3-44
3-17	ECG Amplifier Noise, Leads Input Test Setup					3-46
3-18	ECG Amplifier Noise, Paddle Input Test Setup					3-47
3-19	Calibration Step Waveform					3-48
3-20	Common Mode Rejection Test Setup (Leads)					3-49
3-21 Common Mode Rejection Test Setup (Paddles)						3-51
3-22	Heart Rate Accuracy Test Setup					3-51
3-23	Service Mode		Test Pattern, Recorder			3-53
3-24	Energy	Accuracy Test Setup				3-55
3-25	R Wave/Sync Pulse/Discharge Delay Test Setup					3-58
3-26	ECG Output Waveform					3-59
3-27	R Wave					3-59
3-28	Sync Pulse Superimposed on R Wave					3-60
3-29	R Wave/Sync Pulse/Discharge Pulse Relationship					3-60
4-1	Screw Locations for Disassembly					4-1
4-2	Inside	View of 78670A				4-2
4-3	Circuit Board Shield Removal (78670A)					4-3
4-4	Low Voltage Power Supply Board Removal(78671A)					4-4
4-5	Defibrillator Charger Board Removal (78671A)					4-6
4-6	H.V. Component			Servicing (78671A)		4-6
4-7	Cable Housing Assembly Removal (78671A)					4-7
4-8	Paddle	Cable	Replacement(78671A)			4-7
4-9	Paddle	Cable	Replacement (78671A)			4-8
4-10	Upper Housing Circuit Board Location					4-11
4-11	Front Panel		Removal			4-14
4-12	Front Panel		Removal			4-14
4-13	CRT Removal					4-15
4-14	CRT Yoke Assembly					4-15
4-15	Mother Board Fuse Location A2-F1 and F2					4-15
4-16	ECG Knob Removal					4-17
4-17	Energy	Select		Knob	Removal	4-17
4-18	Energy	Select		Knob	Removal	4-17
4-19	Recorder Assembly				Removal	4-19
4-20	Recorder Assembly					4-19
4-21	Recorder Mechanism					4-20
4-22	Detail	of Printhead				4-21

IX

TABLE OF CONTENTS

Models 78670A/78671A

78670-1

4-23	Top View of Recorder Housing and Beeper Speaker						4-23	/1*%
4-24	Front Panel Mounted Components on Upper Housing						4-24	'
4-25	Flex	Circuit		Assembly	(A16)		4-25
4-26	LCD	Removal		Sequence			4-27
4-27	LCD	Removal		Sequence			4-27
4-28	LCD	Removal		Sequence			4-27
6-1	System Block			Diagram			6-5/6
6-2	Schematic,		Mother Board A2				6-7/8
6-3	Schematic, ECG Analog Board A3						6-9/10
6-4	Schematic,		ECG Digital Board A4				6-11/12
6-5	Schematic,		Memory Board			A5	6-13/14
6-6	Schematic,		Deflection		Board A6		6-15/16
6-7	Schematic, Clock/Heart Rate Board A7						6-17/18
6-8	Schematic, Recorder Control Board A8						6-19/20
6-9	Recorder Assembly A9						6-21/22
6-10	Schematic, Defibrillator Control Board A10						6-23/24
6-11	Schematic, Defibrillator Charger Board A11						6-25/26
6-12	Schematic,		Low Voltage Power Supply Board A12				6-27/28
6-14	Schematic,		Flex Circuit			Assembly A16	6-29/30
6-15	Schematic, Heart Rate Board A17						6-31/32
6-16	78670A Case			Assembly	A1		6-33/34
	78670A Case			Assembly	(cont.)		6-35/36
6-17	Receptacle		Cable Assembly				6-37/38
6-18	78671A Case Assembly				A1		6-39/40
7-1	O'iic'<-X,.ount 0o\iw vise						7-1	--•%
7-2	Quick-Mount Power Base					(Bottom View)	7-3	/
7-3	Quick-Mount Power Base					Inner Circuitry	7-3
7-4	Schematic,		Power Supply			Board	7-7/?
7-5	78669A Battery Charger						7-0
7-6	Timing Diagram						7-11
7-7	Top Cover Removal						7-f
7-8	Bottom Cover Removal						7-13
7-9	Removing Heat Radiator						7-13
7-10	Battery Charger with Top Cover Removed						7-H
7-11	Battery Charger with Bottom Cover Removed						7-14
7-12	Battery Charger Circuit					Board	7-15
7-13	Schematic,		Battery Charger Board				7-17/1'3
8-1	78670A, Option A03 Case Assembly						8-9/10

TABLE OF CONTENTS

Models 78670A178671A

78670-1

TABLES

TABLE TITLE PAGE

1-1	Model 78670A Defibrillator/Monitor with Annotating Recorder Specs .						1-2
1-2	Model	78671A Defibrillator/Monitor/Recorder Specs					1-3
1-3	Power Cable Sets						1-16
3-1	Required		Test Equipment		for Level	II Performance,
	Safety		and Maintenance Tests				3-2
3-2	Equipment Necessary			if the Dempsey		Model 431F
	Safety Analyzer is not used						3-3
3-3	Adjustment Location						3-18
3-4	Test	Equipment Req'd		for	ECG Amplifier/Heart Rate Spec Checks . . .		3-39
3-5	Test	Equipment Req'		for	Recorder Specification Checks		3-52
3-6	Test	Equipment Req'd		for Defibrillator Specification Checks ....			3-54
3-7	Test Equipment Req'd for Synchronizer Specification Checks						3-58
6-1	Manufacture's Code						6-3

XI

TABLE OF CONTENTS

Models 78670A/78671A

78670-1

XII

SECTION 1- GENERAL INFORMATION

Models 78670A/78671A

78670A-1

SECTION I - GENERAL INFORMA TION

Models 78670A/78671A

78670A-1

SECTION I

GENERAL INFORMATION

1.1 INTRODUCTION

This manual contains service information for the Model 78670A and the Model 78671A

Defibrillator/Monitors. This manual also contains complete theory of operation, mechanical disassembly, circuit board removal and replacement procedures, and component level troubleshooting for both instruments. Operating instructions and

installation	information are covered in	the Model 78670A Operating Guide,
78670-91998	and in the Model 78671A Operating	Guide, 78671-91998.

1.2IDENTIFICATION

This manual applies to all Model 78670A and 78671A Defibrillator/Monitors having the same or lower serial number prefix as that shown on the title page. The serial number prefix digits are the first four of the ten-digit instrument serial number

(XXXXA00000), and identifies the latest modification of the instrument. The letter separating the prefix and the serial number designates the country in which this

instrument was

manufactured

(A =

USA;

C = Canada;

G

= Germany;

J = Japan;

U =

United Kingdom).

The

serial

number

of

the

78670A

Defibrillator/Monitor,

78671A

Defibrillator/Monitor,

and

the

78669A

Spare Battery

Charger

is indicated

on

the

plate which

is

attached to

the

bottom cover,

near

the

center

of

the instrument.

The

serial

number for

the 78668A

Quick-Mount Power Base

is located

on the rear

of

the instrument next to the AC power receptacle.

Important information for correcting errors, and for adapting the contents of this manual to cover improvements that occur after the printing of the manual is provided in a blue Manual Changes Supplement inserted under the front cover of the manual. These supplements are keyed to the manual print date and part number, both

of which	appear on	the	title page,	and	are	revised as	often	as necessary to keep
the manual current		and	accurate.	The	Errata Section		of a	Manual Change sheet
contains	corrections	for	errors within		the	manual.

On the title page of this manual, preceding the manual part number, is a microfiche number. This part number can be used to order 6.5 x 15.2 cm (4x6 inch) microfiche transparencies of this manual. Each microfiche contains up to 60 photo duplicates of the manual pages. The microfiche package also includes the latest manual change as well as all pertinent Service Notes.

1.3INQUIRES

Refer any questions or comments regarding this manual to the nearest Hewlett

Packard	Sales/Service	Office.	Always	identify the instrument		by	both	model	number
and complete 10-digit		serial	number	in all	correspondence.	See	the	rear	of this
manual	for a worldwide	listing	of the	Hewlett	Packard Sales/Service Offices.

/-/

SECTION I - GENERAL INFORMA TION

Models 78670A/78671A

78670A-3

1.4 DESCRIPTION

1.4.1 General

With the exception of the annotating printhead on the recorder, the paddle contact indicator and interchangeable paddle connector, the 78670A and the 78671A are the same. The printhead, paddle contact indicator, paddle connector,and associated functions and controls are deleted in the 78671A Defibrillator/Monitor.

DEFIBRILLATOR

Waveform: Critically damped sinusoidal.

Output Energy (Delivered): 5, 10,

20, 30, 50, 70, 100, 150, 200 300

and 360 joules.

Charge Control: Push-button on apex

paddle.

Charge Time: Less than 10 seconds to

360 joules.

Delivered Energy Display: Liquid

Crystal Display shows energy that will be

delivered into 50 ohms load and self test

energy.

Armed Indicators: Charge done tone,

light and digital display.

Safety Interlock: Output limited

to 50 joules with internal paddles

connected.

Paddle Contact Indicator: 3-color

LED bar graph array on sternum paddle

indicates quality of defibrillator paddle

contact before discharge.

Paddles: Standard paddles are Anterior/ Anterior, adult and pediatric. Adult

electrodes twist off to expose pediatric

electrodes. Full range of internal

paddles available.

Synchronizer: SYNC indicator flashes

off with each detected R-wave. Marker

pulse on monitor indicates defibrillator

discharge point. Discharge occurs within

30 ms. of marker pulse.

SIZE and WEIGHT
Dimensions:	22.9	cm H x 31.1 cm
W x 47 cm L	(9" x	12.25" x 18.50").

Weight: 12.7 kg (28 pounds).

OPTIONS

A03 Delete interchangeable paddle

connector .

C01 Add 78669A Spare Battery

Charger.

C02 Delete 78668A QuickMount

Power Base.

C03 Add Adult/Pedi Anterior/

Posterior Paddles 14412D.

C04 Add Adult Internal Paddles;

includes handle set, part

MONITOR

Inputs: ECG from paddles or 3-lead

patient cable. Lead I, II, III selectable in

LEADS position. LEADS or PADDLES

indicator lights to show selected source.

Lead Fault: INOP indicator flashes

if patient lead becomes disconnected.

Common Mode Rejection: 112 dB

with 5K ohm imbalance with respect to

non-isolated ground.

Display Size & Type: 4.5 cm x 9 cm for

3.75 seconds of ECG data on screen;

non-fade, fixed trace.

Patient Isolation: Twelve (12) megohms

or greater at input connector.

Sweep Speed: 25 mm/sec nominal.

Frequency Response: 0.5 to 40 Hz

Heart Rate Display: Digital readout

from 20 to 240 BPM.

ECG Output: 1V, Nominal.

Calibration: Momentary pushbutton switch simulates 1 mV signal to ECG amplifier.

RECORDER

Annotation: 10 characters/sec nominal.

Paper Size: 50 mm x 30 m (100 ft) with

40 mm offset grid.

Recorder Modes: Delayed by 4 seconds

(Real Time available).

Frequency Response: 0.5 to 40 Hz

BATTERIES

Type: 2.0 A/hr rechargeable nickel-

cadmium.

ORDERING INFORMATION

	number		14990B		and adult
	electrode		(8.1	cm)		set,	part
	number 14993 A.
C05	Add Pediatric Internal
	Paddles;		includes		handle		set,
	part	number		14990B			and
	pediatric		electrodes			(5.1	cm)
	set, part number 14992 A.
C06	Add	Infant Internal Paddles
	(3.4	cm)		part		number

14416A

Charge Time: 16 hours for fully

depleted battery.

Capacity: Fifty (50) full energy

discharges or 2.5 hours of monitoring

or 1.5 hours combined monitoring and

recording.

Charge Indicator: Light is on when

battery is charging; flashes when battery

is low.

STANDARD ACCESSORIES

78668A Quick Mount Power Base

Redux®	Paste, 1		oz..	Part	number
651-1029
ECG Cable, Part number 14489B
Electrode	Lead	Set,		part	number
14151 A.	Disposable		Electrodes, part
number 14445A.
Power Cable, Male NEMA-Female
CEE22,	2.4 m	(8	ft)	part	number

8120-3493-

Recorder Paper, spare roll, part number

9280-0980.

Adjustment	Tool,	part	number
78660-27800.

Operating Manual: Part Number

78670-91998

Operating Instruction	Card:	Part
Number 5952-6866
OPTIONAL ACCESSORIES
ECG Output Cable,	Part	number

8120-3164

Sync Cable, Part number 14482A.

78669A Spare Battery Charger

NOTE: Options C03, C04, C05 and C06

are not available with option A03.

L01 French Labels

L02 German Labels

L03 Dutch Labels

N01 CSA

N02 VDE/IEC Configuration

Z01 50 Hz Operation

Z02 100 volt Operation

Z05 230 volt Operation

900UK Power Cord

901Australian Power Cord

902European Power Cord

906 Swiss Power Cord

Table 1-1. Model 78670A Defibrillator/Monitor/Annotating Recorder Specifications.

1-2

DEFIBRILLATOR

Waveform: Critically damped sinusoidal.

Output Energy (delivered): 5,10, 20, 30,

50, 70,100,150, 200,300 & 360 joules.

Charge Control:Push-button on apex

paddle.

Charge Time: Less than 10 seconds to

360 joules.

Delivered Energy Display: Liquid

Crystal Display shows energy that will be

delivered into 50 ohms load and self test

energy.

Armed Indicators: Charge done tone,

light and digital display.

Paddles: Standard paddles are Anterior/

Anterior, adult and pediatric. Adult

electrodes twist off to expose pediatric

electrodes.

Synchronizer: SYNC indicator flashes

off with each detected R-wave. Marker

pulse on monitor indicates defibrillator

discharge point. Discharge occurs within

30 ms. of marker pulse.

Dimensions: 22.9 cm H x 31.1 cm W x

47 cm L (9" x 12.25" x 18.50").

Common Mode Rejection: 112 dB with 5K ohm imbalance with respect to non isolated ground.

Display Size & Type: 4.5 cm x 9 cm for

3.75 seconds of ECG data on screen;

non-fade, fixed trace.

Patient Isolation: Twelve (12) megohms

or greater at input connector.

Sweep Speed: 25 mm/sec nominal.

Frequency Response: 0.5 to 40 Hz.

Heart Rate Display (Optional): Digital

readout from 20 to 240 BMP.

ECG Output: 1V, nominal

Calibration: Momentary push-button switch simulates 1 mV signal to ECG amplifier.

RECORDER (Optional)

Paper Size: 50 mm x 30 m (100 ft) with 40 mm grid.

Recorder Modes: Delayed by 4 seconds (Real Time available).

Frequency Response: 0.5 to 40 Hz.

BATTERIES

Type: 2.0 A/hr rechargeable nickel-

cadmium.

SECTION I - GENERAL INFORMA TION

Models 78670AJ78671A

78670A-3

Charge Indicator: Light is on when battery is charging; flashes when battery

is low.

STANDARD ACCESSORIES

78668A Quick Mount Power Base

Redux® Paste, 1 oz.. Part number

651-1029

ECG Cable, Part number 14489B.

Electrode Lead Set, Part number

14151A.

Disposable Electrodes, Part number

14445a .

Power Cable, Male NEMA-Female

CEE22, 2.4 m (8 ft) part number

8120-1992.

Recorder Paper, spare roll. Part number

9280-0980.

Adjustment

Tool,

Part

number

78660-27800.

Operating Manual: Part number

78671-91998

Operating Instruction Card: Part

number 5952-6868

OPTIONAL ACCESSORIES

ECG Output Cable, Part number

8120-3493.

Weight: 12.7 kg (28 pounds)

MONITOR

Inputs: ECG from paddles or 3-lead

patient cable, Lead I, II, III selectable in

LEADS position. LEADS or PADDLES

indicator lights to show selected source.

Lead Fault: I NOP indicator flashes if

patient lead becomes disconnected.

OPTIONS

Charge Time:	16 hours for fully	Sync Cable, Part number 14482A.
depleted battery.		78669A Spare Battery Charger

Capacity: Fifty (50) full energy discharges or 2.5 hours of monitoring or

1.5 hours combined monitoring and

recording.

ORDERING INFORMATION

A01	Delete Recorder	L01	French Labels	Z02	100 volt Operation
A02	Delete Recorder & Heart Rate	L02	German Labels	Z05	230 volt Operation
C01	Add 78669A Spare Battery	L03	Dutch Labels	900	UK Power Cord
	Charger	N01	CSA	901	Australian Power Cord
C02	Delete 78668A Quick-Mount	N02	VDE/IEC Configuration	902	European Power Cord
	Power Base	Z01	50 Hz Operation	906	Swiss Power Cord

Table 1-2. Model 78671A Defibrillator/Monitor Specifications.

1.4.2 Model 78670A Defibrillator/Monitor with Annotating Recorder

The 78670A

is

a

critically

damped sinusiodal

waveform

defibrillator

(see

figure

1-2)

combined

with a

non-fade ECG

monitor

and

annotating

strip

chart recorder.

Energy

is

selectable

to 360

joules

(delivered

into

a

50 ohm

load)

in

eleven

discrete

steps,

(400

joules

replaces

360

joules

with option

A01).

The

ECG

Monitor

displays

HEART RATE,

and

ECG

obtained

through

the

paddles

or

through

a

three-lead

patient

cable.

HEART

RATE

ALARMS

are

preset at

30

and

150

1-3

SECTION I - GENERAL INFORMA TION

Models 78670A178671A

78670A-l

1.4.6Defibrillator Output Information

The defibrillator stores sufficient energy to discharge 360 joules into a fifty ohm

impedance.

However,

the

actual energy

delivered into

a patient

is a

function of

the total impedance

to

the

defibrillator

charge.

As

a

practical

matter,

the

operator controls

the

largest

portion of this

impedance

by the quality of the skin

preparation.

If

sufficient

electrolyte

is

applied,and

paddle

pressure of

20-25

pounds is used, then

an impedance of approximately

50 ohms

would

be expected

and a

near normal

discharge

would occur.

The output

waveforms

shown

in Figure 1-2

indicate that with

decreased impedance,

higher peak

current is

obtained.

Recent

clinical

evidence indicates

that the peak

current

value

must

reach

a certain

threshold

for defibrillation

and

should

therefore

be

optimized

for

any

particular

energy setting.

The primary

method

available to the operator for accomplishing this is through proper

paddle

preparation techniques.

As

an

aid to the

operator,, the '78670A provides

a paddle

contact

indicator

(on

sternum

paddle)

that

helps achieve

best paddle

contact,

before discharge,

optimizing current delivered to the patient.

100 i -

360 JOULES

-20 L-

Figure 1-2. Defibrillator Waveform

1.4.7Self Diagnostics

The 78670A and 78671A Defibrillator/Monitors use microprocessor technology to control and monitor system operation. This advanced design enables the unit to perform a self-diagnostic routine.

1-5

SECTION I - GENERAL INFORMA TION

Models 78670A178671A

78670A-l

/*%

3. DELIVERED ENERGY DISPLAY

The DELIVERED ENERGY readout indicates the amount of energy which will be delivered into a 50 ohm load when the defibrillator is discharged. The liquid crystal, digital display permits easy viewing in almost any ambient light condition.

4.PADDLE CONTACT INDICATOR

The PADDLE CONTACT indicator on the sternum paddle indicates the best paddle

contact,	before	discharge.		This helps the user optimize current		delivered to the
patient.	When	the	paddles	are applied to the	patient, the LED changes from RED to
YELLOW to	GREEN	as	patient	impedance decreases	- indicating proper	paddle pressure

and that sufficient electrolyte is applied.

5.CHARGE DONE INDICATOR

The CHARGE	DONE	indicator	lights	when the defibrillator reaches selected energy
after the	charge	button is	pressed	and released. In addition, a CHARGE DONE TONE

indicates when the defibrillator is armed and ready for discharge.

6.SYNC/DEFIB SWITCH

The SYNC/DEFIB switch selects either the instant defibrillation (DEFIB) or synchronous (SYNC) mode of operation. In the DEFIB mode, the defibrillator discharges as soon as both of the discharge buttons on the paddles are pressed. In

the SYNC	mode, the	defibrillator will	discharge at	the first	point on	the	ECG
waveform	indicated by	the marker pulse	— after both	discharge	buttons	have	been
pressed.

The defibrillator automatically sets itself to the DEFIB mode when the instrument is turned on. For synchronized operation, move the switch momentarily to the left

(SYNC position). The defibrillator can be reset for instant discharge at any time by moving the switch momentarily back to the DEFIB position or turning this

instrument off and on.

Note: For synchronized operation, the ECG SOURCE selector must be in the LEADS position. If the ECG SOURCE selector is in the PADDLES position, the unit will NOT go into the sync mode.

7.SYNC INDICATOR

The SYNC indicator flashes off with each detected R-wave during the synchronized

mode of operation.

8.ECG SOURCE SELECTOR

The ECG SOURCE selector selects the source of the incoming ECG signal: 3-lead ECG cable (LEADS) or ECG pick up from paddles (PADDLES). LEADS I, II and III may be selected in the LEADS position. In addition, in the LEADS position, the indicator will flash should an electrode become disconnected, indicating an INOPerative

condition.

1-8

SECTION I - GENERAL INFORMA TION

Models 78670A178671A

78670A-l

11. ECG SIZE CONTROL

The ECG SIZE control (combined with 1 mV Cal button) adjusts and maintains the size

of the ECG waveform displayed on

the

monitor. Turn clockwise to the AUTO position

and the height of

the waveform

is automatically

maintained between

0.8 and 1.6 cm

when in

the DEFIB

or instant

mode.

When

the defibrillator

is

operated

in

the

synchronized

or SYNC

mode,

the

AUTO

setting

is

locked out.

When

the

ECG

SIZE

control is

pressed,

the monitor

generates a simulated 1 mV

signal

for

calibrating the

display.

The

calibration

signal will

also

appear

on

the

recorder, if it is running (delayed by four seconds in the delayed mode).

12.RECORDER CONTROL/PUSH FOR 8 SECOND RUN BUTTON

The RECORDER control has three positions — STANDBY, RUN and PUSH FOR 8-SEC RUN.

With the RECORDER control in the STANDBY position, the recorder turns on automatically when the ALARM switch is in the ON position and heart rate alarm

limits (30	and	150	BPM) are	exceeded,	and/or when	the	defibrillator CHARGE		button
is pressed.		When	initiated	by alarm	violation,	the	recorder run	lasts	for	16
seconds.	When	initiated by		pressing the CHARGE button,			the recorder	runs lasts		for
12 seconds	after discharge.

With the RECORDER control in the RUN position, the recorder runs continuously until the operator returns the RECORDER control to the STANDBY position or the low paper

switch activates.

CAUTION: To prevent possible printhead damage,						the recorder should		not	be operated
without paper	installed.		A new	paper	roll	provides approximately		20	minutes of
recording time	and	a red warning		strip	appears approximately 30		feet		from the	end
of the paper roll.
PUSH FOR 8-SEC	RUN	turns	the recorder on for			a timed 8 second	run.	Multiple		taps

of the control result in consecutive 8-second runs up to a maximum of 60 seconds.

Any recorder run can be terminated by moving the RECORDER control switch to the RUN

position and back to STANDBY.

13.ANNOTATING RECORDER (78670A only)

The annotating recorder uses 50 mm, thermal paper (HP Part Number 9270-0980) with a

40 mm offset grid to allow printing along the top edge. Stylus heat and baseline position are screwdriver adjustments from the front of the recorder enclosure (they

are preset and should not need adjustment).

Each

time the

recorder

runs, DATE/TIME and

patient HEART

RATE

are

alternately

annotated at 5 second intervals as shown in Figure 1-7.

When

the recorder

run

is

initiated

by pressing

the

CHARGE

button,

SELECTED

ENERGY

is annotated.

When

the

DISCHARGE

buttons are

pressed,

actual

DELIVERED

ENERGY,

PEAK

CURRENT and

PATIENT IMPEDANCE

are annotated

(if

the

patient

impedance is ^

measured to be

less than

200 ohms).

A sample strip

is shown

in

Figure

1-8.

/

Note: At a 5 Joule setting, no delivered energy information will be printed.

1-10

SECTION I - GENERAL INFORMA TION

Models 786 70A/786 71A

78670A-1

HEART RATE

MONTH	H0UR & M|NUTES
DA\E	/	SECONDS

_ 23 :|:EP 1513:f0

KM HEWLETT » PACKARD

Figure /-7

DELIVERED 110J 19A 12 J OHf-fS 23 SEP 1531:50

Figure 1-8

14.ALARM SWITCH/PUSH TO MARK BUTTON

The ALARM switch has three positions -- ON, OFF and PUSH TO MARK (78670A only).

With the ALARM switch in the ON position, an audible warning and automatic

16-second recorder run are initiated when patient heart rate remains lower than 30

BPM or higher than 150 BPM for more than 4 seconds.

The alarm limits are not adjustable. Alarm reset occurs automatically if the heart rate returns to the 30 to 150 BPM range.

With the ALARM switch in the OFF position, the alarm circuitry is disabled.

PUSH TO	MARK	(on78670A	only) gives	a down	ARROW	(\ ) and the TIME on the recorder
paper.	This	function	is useful in	recording the		occurrence		of	significant events
						MA kRKER
						X
		^ EP 15	,-	HF:	,7I 1	•i-	2~-5	S EP	l£l 2 •?.?
	t	r	|		1	J	\
	t
			1			A	J		;
	4 ~* *K ** V		i			I
			Wi—		jl	jl

1

i	i	,

•

i

1

$ *.				I			t	I
i
							t	1
rl i,ti u ,t# ii.t r .	-	.1	II	ill'	:	it., t ,1	.1
	• !"'				tt

Figure 1-9

1-11

SECTION I - GENERAL INFORMA TION

Models 78670Aj78671A

78670A-1

1.6OPTIONS

Options available for use with both the 78670A and 78671A Defibrillator/ Monitors

are listed in Tables 1-1 and 1-2.

1.7GENERAL INSTALLATION INFORMATION

1.7.1Initial Inspection

1.7.1.1Mechanical Inspection

As soon

as the

shipping container

is

opened, check the

instrument

for visible

damage,

such as broken controls or connectors,

and

dents

or scratches

on the panel

surface.

If

damage is

found,

refer to

Paragraph

1.8.2

for the

recommended

claim

procedure and

repacking

information.

If

the

shipping carton

is

not damaged,

check

the cushioning

material

and note

any

signs of severe

stress

as

an

indication of

rough handling

in transit.

This

may be necessary to

support

claims for

hidden

damage which may become apparent only during subsequent testing. Retain the packaging material for possible future use.

1.7.1.2Electrical Inspection

Check the electrical performance of the	instrument	as soon	as possible after
receipt, using the recommended performance	checks in	Section	6 of the Operating
Manual.

1.7.2	Claims and Repackaging
1.7.2.1	Claims for		Damage
If physical		damage	is evident	or	if	the	defibrillator	does	not meet	specified
operational		requirements when		received,			notify the	carrier	and the	nearest
Hewlett-Packard Sales/Service Office					at	once.

1.7.2.2 Original Packaging

Containers and materials used to ship your 78670A and 78671A are specifically designed for the instrument and not readily available through local Hewlett-Packard

offices, therefore, RETAIN THE ORIGINAL					MATERIALS		FOR	FUTURE	USE.	If	the
instrument is	being	returned		to Hewlett-Packard		for	servicing,		attach	a	tag
indicating the	type	of	service	required,	return	address,		model number		and	full
serial number.	Also,		mark the container		FRAGILE	to ensure		careful	handling.		In

any correspondence, refer to the instrument by model number and full serial number.

1.7.2.3Other Packaging

Follow	these general		instructions	when	repackaging with commercially			available
materials:
Wrap the instrument		in	heavy paper or plastic. If			shipping	to a HewlettPackard
office	or service	center, attach		a tag	indicating	the type	of service	required,
return	address, model		number and full serial number.

1-13

SECTION I- GENERAL INFORMATION

Models 78670A/78671A

78670A-1
Use	a strong shipping container.		A	double-wall	carton	made of	350 pound	test
material is		adequate.
Use	enough	shock absorbing material	(3	or 4 inch	layer)	around	all sides	of the

instrument to provide firm cushioning and to prevent movement inside the container.

Protect the control panel with cardboard.

Seal the shipping container securely.

Mark the shipping container FRAGILE to ensure careful handling.

1.8Preparing for Operation

Refer to Section 6 of the Operating Manual for checkout and installation procedures.

1.9ENVIRONMENT

1.9.1Operating Environment

The location of your Defibrillator/Monitor should be reasonably free from

vibration,	dust, corrosive or explosive vapors	or	gases, extreme	temperature and
excessive humidity. The operating environment		for	the 78670A and	78671A including
all options	is:

Temperature: -20 degrees C through 55 degrees C (-4 degrees F through 131 degrees F)

Relative Humidity:

5% through 95%

Altitude: 4,500 m (15,000 ft) max

Note:

Instrument meets all

specifications

from zero degrees

C to 55 degrees C

(32 degrees

through 131 degrees F).

For

maximum

battery

life

the instrument

should

not

be used

on the 78668A Power

Base

below

zero degrees

C (32 degrees

F).

WARNING:

DO

NOT

USE THE DEFIBRILLATOR IN A FLAMMABLE ATMOSPHERE

(i.e.

OXYGEN TENTS

OR WHERE CONCENTRATIONS OF FLAMMABLE ANESTHETICS

MAY OCCUR).

AVOID

USING

PORTABLE

OR EMERGENCY VEHICLE-MOUNTED

DEFIBRILLATORS

AROUND AUTO WRECKS.

SPILLED

GASOLINE

AND PUDDLES

OF

WATER PRESENT EXTREMELY DANGEROUS

EXPLOSION AND

SHOCK

HAZARDS.

1.9.2Storage and Shipment Environment

The storage and shipping environment for the 78670A and 78671A are:

Temperature: -40 degrees C through 65 deqrees C (-40 degrees through 149 degrees F)

Altitude: 9,000 m (30,000 ft) max

Relative humidity: 5% through 95%

1-14

SECTION I - GENERAL INFORMA TION

Models 78670A/78671A

78670A-1

1.10POWER REQUIREMENTS (MODEL 78668A POWER BASE)

The Model 78668A	Quick-Mount Power Base allows		AC	operation		of	both	models.	The
instruments will	operate from a line voltage		of	from 100		to	130	Vac (115	Vac
nominal) at 50-60	Hz with the 78668A rear	panel	line		selector in the			115 position.
In addition, operation from a line voltage		of 200 to			250 Vac	(230 Vac nominal)			at

50-60 Hz is possible with the line selector in the 230 position.

1.11INSTRUMENT GROUNDING AND POWER CORD SETS (78668A POWER BASE)

To protect hospital personnel and the patient, the Power Base must be properly grounded. Accordingly, the Power Base is equipped with a detachable 3-wire power cable which grounds the instrument to the power line ground when plugged into an appropriate 3-wire receptacle. Available power sets, USA and non-USA are identified and described in Table 1-3, Power Cable Sets.

WARNING:	FOR PROPER	GROUNDING,	THE POWER RECEPTACLE MUST	BE	A 3-WIRE GROUNDED
OUTLET.	A HOSPITAL	GRADE OUTLET	IS RECOMMENDED. NEVER ADAPT	THE	3-PRONG PLUG FROM

THE MONITOR TO FIT A 2-SLOT OUTLET. IF THE OUTLET HAS ONLY TWO SLOTS, SEE THAT IT

IS REPLACED WITH A 3-SLOT GROUNDED OUTLET.

The 78670A and 78671A store high voltage energy and are capable of delivering up to

360 Joules. Simply removing the defibrillator from the Quick-Mount Power Base or unplugging the power base will not remove power from a battery-powered instrument.

The ENERGY SELECT	switch	must	be placed	in the OFF	position	or the		discharge
buttons pressed to discharge			a charged	instrument.	As a safety		feature,		the
defibrillator is	designed	to	automatically discharge		internally	if	it	has	been

charged for more than 32 seconds.

The 78670A and 78671A are designed with all plastic covers and controls to minimize shock hazard. Because a battery-powered instrument has no reference to earth ground, small static charges can be generated during defibrillator discharges. The static charges present a minor shock potential to the operator, BUT ONLY through the exposed metal surfaces (ground connector connector, IV ECG OUT, and recorder housing). Avoid touching these surfaces during battery operation.

1.12MOUNTING (78668A POWER BASE)

Mounting instructions for the 78668A Quick-Mount Power Base are located in Section

6 of the Operating Manual.

1-15

SECTION I - GENERAL INFORMATION

Models 786 70A/786 71A

78670A-l

/^%

WARNING

REPLACEMENT POWER CABLES MUST PROVIDE CORRECT POLARITY AND GROUNDING AS

ILLUSTRATED. INCORRECT CONNECTIONS CAN RESULT IN AN ELECTRICAL HAZARD.

Table 1-3. Power Cable Sets.

Table 1-3 contains descriptions, Hewlett-Packard stock numbers and wire color codes for AC power cable sets that connect to instruments manufactured by the HP Medical Products Group.

AC POWER CABLE SETS (U.S.A.)

FEMALE CEE 22 IEUROPA)

MALE NEMA (HARD-WIRED)

(HOSPITAL GRADE)

	^ -
3"	<L)	BROWN OR BLACK
	<E)	GREEN/YELLOW
c	iN) LIGHT BLUE OR WHITE
			0
	MALE CEE (EUROPA)		c
	<L)	BROWN OR BLACK	0
Cffl	—HE)	GREEN/YELLOW
	<N)	LIGHT BLUE OR WHITE

MALE NEMA (MOLDED)

o	o		<N> WHITE
3)	(/>	(.	E)	GREEN/YELLOW
>2
Oh			ID	BLACK
m	^

r

MALE NEMA S0° (HARDWIRED)

f^, —<N) WHITE

MSC	#V-(E) GREEN/YELLOW OR GREEN					<N> WHITE
	[_—*-^-(Ll BLACK					E)	GREEN/YELLOW
						<L)	BLACK
	MALE NEMA (HARD WIRED)
		<N) WHITE
	C-~r-(E) GREEN/YELLOW		-	EARTH OR SAFETY GROUND
		E
		'L) BLACK	-	NEUTRAL OR IDENTIFIED CONDUCTOR
		N
		L	-	LINE OR ACTIVE CONDUCTOR
	CONNECTORS		POWER CABLE			AWG/NO. OF	HP PART
MALE END		FEMALE END	LENGTH			CONDUCTORS	NUMBER
NEMA (HARD •WIRED)		CEE 22	2.4M		(8.0 FT)	16/3	8120-1931
NEMA (HARD WIRED)		CEE 22	3.6M		(12.0 FT)	16/3	8120-1932
NEMA (HARD WIRED)		5 CM (2 IN.) STRIPPED ENDS	4.5M		(15.0 FT)	14/3	8120-1706
NEMA (HARD •WIRED)		2.6 CM (3 IN.) STRIPPED ENDS	3.6M		(12.0 FT)	16/3	8120-1935
NEMA (HARD •WIRED) HOSPITAL GRADE		CEE 22	2.4M		(8.0 FT)	16/3	8120-3493
NEMA (HARD •WIRED) HOSPITAL GRADE		CEE 22	3.6M		(12.0 FT)	16/3	8120-1993
NEMA (HARD WIRED) HOSPITAL GRADE		CEE 22	4.5M		(15.0 FT)	16/3	8120-1995
NEMA (HARD WIRED) HOSPITAL GRADE		CEE 22	76 CM		(2.5 FT)	16/3	8120-1996
NEMA (HARD •WIRED) HOSPITAL GRADE		2.6 CM (3 IN.) STRIPPED ENDS	3.6 CM		(12.0 FT)	16/3	8120-1994
NEMA (HARD•WIRED) 90°		CEE 22	2.4M		(8.0 FT)	16/3	8120-0609
NEMA (HARD WIRED) 90°		CEE 22	76 CM		(2.5 FT)	16/3	81200610
CEE 22		CEE 22	76 CM		(2.5 FT)	16/3	8120-1900
CEE 22		CEE 22	2.4 M		(8 FT)	16/3	8120-2133
CEE 22		2.6 CM (3 IN.) STRIPPED ENDS	76 CM		(2.5 FT)	16/3	8120-1933
CEE 22		2.6 CM (3 IN.) STRIPPED ENDS	1.2M		(4.0 FT)	16/3	8120-1934	/-%

NOTE: OTHER COUNTRIES SUCH AS CANADA. JAPAN (100 or 200 VOLTS).

MEXICO, PHILIPPINES, AND TAIWAN MAY USE SOME OF THE ABOVE SETS.

CONSULT YOUR NEAREST HP SALES OFFICE.

1-16