Fluke 863, 867B Service Manual

®

867B,863

Graphical Multimeters

Service Manual

PN 689312

December 1997

© 1997 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies.

Table of Contents

Chapter		Title	Page
1	Introduction and Specifications ..........................................................................................		1-1
	1-1..	Introduction .............................................................................................................	1-3
	1-2.	Description ..............................................................................................................	1-3
	1-3.	Power Requirements ...............................................................................................	1-3
	1-4.	Options, Accessories and Related Equipment .......................................................	1-4
	1-5.	Operating Instructions ............................................................................................	1-4
	1-6.	Obtaining Service ...................................................................................................	1-4
	1-7.	Conventions Used in This Manual .........................................................................	1-5
	1-8.	Chapter Contents ....................................................................................................	1-5
	1-9.	Specifications ..........................................................................................................	1-6
2	Theory of Operation.............................................................................................................		2-1
	2-1.	Introduction .............................................................................................................	2-3
	2-2.	Start-Up Sequence ..................................................................................................	2-3
	2-3.	Function Selection ..................................................................................................	2-3
	2-4.	Power Supply ..........................................................................................................	2-4
	2-5.	Power Supply Input Voltages .................................................................................	2-4
	2-6.	Power Supply Output Voltages and Currents ........................................................	2-6
	2-7.	Power Supply Signals ............................................................................................	2-7
	2-8.	Power ON/OFF Requirements ...............................................................................	2-8
	2-9.	NiCd Charging Requirements ................................................................................	2-8
	2-10.	Battery and Line Level Detection ..........................................................................	2-8
	2-11.	Power Supply Functional Blocks ...........................................................................	2-9
	2-12.	Input Power Selector (A) ........................................................................................	2-9
	2-13.	Boost Preregulator (B) ............................................................................................	2-10
	2-14.	Battery Charger (C) ................................................................................................	2-10
	2-15.	DC-DC Converter (D) ............................................................................................	2-12
	2-16.	Backlight Current Sink (E) .....................................................................................	2-12
	2-17.	Power Switch Circuitry (F) ....................................................................................	2-12
	2-18.	LCD Contrast Control (G) ......................................................................................	2-12
	2-19.	Power-On Reset Circuit (H) ...................................................................................	2-12
	2-20.	Linear Post Regulators (I) .......................................................................................	2-13
	2-21.	Input Overload Protection ......................................................................................	2-13

i

			Contents (continued)
	2-22.	Volt/Ohms Input Protection ...................................................................................	2-13
	2-23.	External Trigger and Logic Activity Input Protection ...........................................	2-14
	2-24.	Amps / mA / µA Input Protection ..........................................................................	2-14
	2-25.	Input Signal Conditioning ......................................................................................	2-14
	2-26.	AC Volts .................................................................................................................	2-14
	2-27.	DC Volts .................................................................................................................	2-16
	2-28.	mV DC ....................................................................................................................	2-16
	2-29.	Ohms .......................................................................................................................	2-17
	2-30.	Diode Test ...............................................................................................................	2-17
	2-31.	Capacitance .............................................................................................................	2-17
	2-32.	mA/µA ....................................................................................................................	2-18
	2-33.	Amps .......................................................................................................................	2-18
	2-34.	Waveform Processing .............................................................................................	2-19
	2-35.	Overview .................................................................................................................	2-19
	2-36.	Detailed Description ...............................................................................................	2-19
	2-37.	Waveform Triggering .............................................................................................	2-20
	2-38.	Overview .................................................................................................................	2-20
	2-39.	Dual Trigger ............................................................................................................	2-20
	2-40.	Single Trigger .........................................................................................................	2-21
	2-41.	External Trigger ......................................................................................................	2-21
	2-42.	Glitch Capture .........................................................................................................	2-22
	2-43.	Single Shot ..............................................................................................................	2-22
	2-44.	Frequency Trigger ..................................................................................................	2-22
	2-45.	Logic Activity Trigger ............................................................................................	2-22
	2-46.	Peak Hold ................................................................................................................	2-22
	2-47.	Auto Diode ..............................................................................................................	2-22
	2-48.	Component Test ......................................................................................................	2-23
	2-49.	Digital Circuitry ......................................................................................................	2-24
	2-50.	RS-232 Serial Port ..................................................................................................	2-24
3	Maintenance ..........................................................................................................................		3-1
	3-1.	Introduction .............................................................................................................	3-3
	3-2.	Warranty Repairs and Shipping Information .........................................................	3-3
	3-3.	Static-Safe Handling ...............................................................................................	3-3
	3-4.	Cleaning ..................................................................................................................	3-4
	3-5.	Disassembly ............................................................................................................	3-4
	3-6.	Reasssembly ............................................................................................................	3-7
	3-7.	Replacing the 440 mA Fuse ...................................................................................	3-9
	3-8.	Replacing the 11A (High Energy) Fuse .................................................................	3-9
4	Perfomance Testing and Calibration .................................................................................		4-1
	4-1.	Introduction .............................................................................................................	4-3
	4-2.	Required Test Equipment .......................................................................................	4-3
	4-3.	Alternative Test Equipment (Fluke 5500A) ...........................................................	4-3
	4-4.	Performance Tests ..................................................................................................	4-4
	4-5.	mV DC Test ............................................................................................................	4-4
	4-6.	DC Volts Test .........................................................................................................	4-6
	4-7.	Diode Test ...............................................................................................................	4-7
	4-8.	AC Volts Test .........................................................................................................	4-8
	4-9.	Ohms and Conductance Tests ................................................................................	4-10
	4-10.	Capacitance Test .....................................................................................................	4-11
	4-11.	Frequency Test ........................................................................................................	4-12
	4-12.	Duty Cycle Test ......................................................................................................	4-14
	4-13.	Logic Test (867B Only) ..........................................................................................	4-15

ii

			Contents (continued)
	4-14.	Amps Tests .............................................................................................................	4-16
	4-15.	Peak Hold Test ........................................................................................................	4-19
	4-16.	Component Test (867B Only) ................................................................................	4-19
	4-17.	Rel Test/Touch Hold Test ......................................................................................	4-20
	4-18.	Glitch Capture Test .................................................................................................	4-21
	4-19.	External Trigger Test ..............................................................................................	4-21
	4-20.	Calibration ...............................................................................................................	4-22
	4-21.	Measuring the System Resistance ..........................................................................	4-22
	4-22.	Starting Calibration Mode on the GMM ................................................................	4-22
	4-23.	mV DC Calibration .................................................................................................	4-23
	4-24.	DC Volts Calibration ..............................................................................................	4-24
	4-25.	DC mAuA Calibration ............................................................................................	4-24
	4-26.	DC Amps Calibration .............................................................................................	4-24
	4-27.	Ohms/nS Calibration ..............................................................................................	4-25
	4-28.	Modifying the Displayed Value .............................................................................	4-25
	4-29.	Ohms Calibration ....................................................................................................	4-26
	4-30.	AC Volts Calibration ..............................................................................................	4-27
	4-31.	AC mA(A Calibration ............................................................................................	4-27
	4-32.	AC Amps Calibration .............................................................................................	4-27
	4-33.	Internal Constants Calibration ................................................................................	4-28
	4-34.	Setting LCD Voltage ..............................................................................................	4-28
5	List of Replaceable Parts .....................................................................................................		5-1
	5-1.	Introduction .............................................................................................................	5-3
	5-2.	How To Obtain Parts ..............................................................................................	5-3
	5-3.	Manual Status Information .....................................................................................	5-3
	5-4.	Newer Instruments ..................................................................................................	5-3
	5-5.	Service Centers .......................................................................................................	5-4
	5-6.	Parts .........................................................................................................................	5-4
6	Schematic Diagrams.............................................................................................................		6-1

iii

List of Tables

Table	Title	Page
1-1.	Power Sources .........................................................................................................	1-4
1-2.	Accessories Included with Each GMM ...................................................................	1-4
2-1.	Power Supply Inputs................................................................................................	2-4
2-3.	Power Supply Signals..............................................................................................	2-7
2-4.	Power Source Detection ..........................................................................................	2-9
2-5.	Average Converter...................................................................................................	2-15
2-6.	RMS Converter (U3) ...............................................................................................	2-16
2-7.	Test Point Voltages..................................................................................................	2-16
2-8.	Ohms Ratiometric Measurements ...........................................................................	2-17
2-9.	Amps Measurement Paths .......................................................................................	2-18
4-1.	Recommended Test Equipment...............................................................................	4-4
4-2.	mV DC Performance Test .......................................................................................	4-4
4-3.	DC Volts Performance Test.....................................................................................	4-6
4-4.	Diode Test Performance Test ..................................................................................	4-7
4-5.	AC Volts RMS Performance Test ...........................................................................	4-8
4-6.	AC Volts Average Performance Test ......................................................................	4-8
4-7.	Ohms Performance Test ..........................................................................................	4-10
4-8.	Conductance Performance Test...............................................................................	4-10
4-9.	Capacitance Performance Test ................................................................................	4-11
4-10.	Frequency (AC Volts) Performance Test ................................................................	4-12
4-11.	Frequency (mAuA) Performance Test ....................................................................	4-12
4-12.	Duty Cycle Performance Test..................................................................................	4-14
4-13.	Logic Performance Test ..........................................................................................	4-15
4-14.	DC Amps Performance Test....................................................................................	4-16
4-15.	AC Amps RMS Performance Test ..........................................................................	4-16
4-16.	AC Amps Average Performance Test .....................................................................	4-17
4-17.	Peak Hold Performance Test ...................................................................................	4-19
4-18.	Component Test Performance Test .........................................................................	4-19
4-19.	Rel Performance Test ..............................................................................................	4-20
4-20.	Touch Hold Performance Test.................................................................................	4-20
4-21.	Glitch Capture Performance Test ............................................................................	4-21
4-22.	External Trigger Performance Test .........................................................................	4-21
5-1.	860 Series Final Assembly ......................................................................................	5-5
5-2.	A1 Main PCA..........................................................................................................	5-8

iv

List of Figures

Figure	Title	Page
1-1.	Temperature and Humidity......................................................................................	1-7
2-1.	Block Diagram.........................................................................................................	2-5
2-2.	Power Supply Blocks ..............................................................................................	2-11
2-3.	Keypad Connections................................................................................................	2-25
3-1.	Disassembly.............................................................................................................	3-5
3-2.	Reassembly..............................................................................................................	3-8
3-3.	Replacing the 400 mA Fuse.....................................................................................	3-9
4-1.	Configuration 1 (mV DC) .......................................................................................	4-5
4-2.	Configuration 2 (DC Volts).....................................................................................	4-6
4-3.	Configuration 6 (AC Volts).....................................................................................	4-9
4-4.	Configuration 5 (Ohms) ..........................................................................................	4-11
4-5.	Configuration 7 (PM5139) ......................................................................................	4-13
4-6.	Configuration 7 (PM5139) ......................................................................................	4-14
4-7.	Configuration 9 (PM5139) ......................................................................................	4-16
4-8.	Configuration 3 (mAuA, DC and AC) ....................................................................	4-17
4-9.	Configuration 4 (Amps, DC and AC)......................................................................	4-18
4-10.	Configuration 8 (Component Test)..........................................................................	4-19
4-11.	Initiating Calibration ...............................................................................................	4-22
4-12.	Entering Calibration Mode ......................................................................................	4-23
4-13.	Modifying the Displayed Value ..............................................................................	4-25
4-14.	Ohms Calibration.....................................................................................................	4-26
5-1.	860 Series Final Assembly .....................................................................................	5-7
5-2.	A1 Main PCA..........................................................................................................	5-16

v

Chapter 1

Introduction and Specifications

	Title	Page
1-1.	Introduction.............................................................................................	1-3
1-2.	Description ..............................................................................................	1-3
1-3.	Power Requirements ...............................................................................	1-3
1-4.	Options, Accessories and Related Equipment.........................................	1-4
1-5.	Operating Instructions.............................................................................	1-4
1-6.	Obtaining Service....................................................................................	1-4
1-7.	Conventions Used in This Manual..........................................................	1-5
1-8.	Chapter Contents.....................................................................................	1-5
1-9.	Specifications ..........................................................................................	1-6

1-1

	Introduction and Specifications	1
	Introduction
Introduction	1-1.

This manual includes the following information:

•Specifications (Chapter 1):

•Theory of Operation (Chapter 2):

•General Maintenance (Chapter 3):

•Performance Testing and Calibration procedures (Chapter 4):

•List of Replaceable Parts (Chapter 5):

•Schematic Diagrams and component locators (Chapter 6):

The information in this manual is applicable to both the 867B and 863 models unless otherwise indicated.

Description

1-2.

The Fluke 867B and 863 Graphical Multimeters (GMMs) provide full digital multimeter (DMM) capabilities along with graphical waveform displays and trend plotting. Model 867B also provides component testing and logic activity testing.

Power Requirements

1-3.

The GMM can be powered with the Battery Eliminator or with 6 “AA” (ANSI/NEDAL40) alkaline cells. New alkaline batteries provide a minimum of 6 hours of continuous operation. You can also use the NiCd battery pack. Depending on battery condition, a fully charged NiCd battery pack provides 8 hours (typical) or less of continuous operation. Internal charging is available on Model 867B.

1-3

867B,863

Service Manual

Table 1-1. Power Sources

		Model 867B	Model 863
	Battery Eliminator Operation	•	•
	Alkaline Battery Operation (6 AA,	•	•
	ANSI/NEDA-L40)
	NiCd Battery Pack Operation (with	•
	internal charging)
	NiCd Battery Pack Operation (with		•
	external charging)
Options, Accessories and Related Equipment			1-4.

Accessories supplied with Fluke 867B and 863 GMMs are listed in Table 1-2.

Table 1-2. Accessories Included with Each GMM

		Model 867B	Model 863
	TL70A Test Leads (2)	•	•
	Battery Eliminator	•
	NiCd Battery Pack	•
Operating Instructions			1-5.

Operating instructions for the Fluke 867B and 863 Graphical Multimeters can be found in the Users Manual. For ordering information, see “How to Obtain Parts” in Chapter 5.

Obtaining Service

1-6.

A GMM under warranty will be promptly repaired or replaced (at Fluke’s option) and returned at no charge. See the registration card for warranty terms. If the warranty has expired, the GMM will be repaired and returned for a fixed fee. Contact the nearest Service Center for information and prices. A list of U.S. and International Service Centers is available on the World Wide Web at www.fluke.com. Refer to Chapter 3 for a list of Fluke telephone numbers.

1-4

	Introduction and Specifications	1
	Conventions Used in This Manual
Conventions Used in This Manual	1-7.

The following conventions are used in this manual:

•“GMM” refers to all Graphical Multimeter models in the 860 Series.

•“863” and “867B” are specifically mentioned where a description does not apply to all models in the 860 Series.

•A “pca” is a printed circuit board and its attached parts.

•A pin or connection on a component is specified by the component reference designator, a dash (-), and a pin number. For example, component U30, pin 92 would be U30-92.

Chapter Contents

1-8.

The chapters in this manual document service for the GMM as follows:

•Chapter 1. Introduction and Specifications describes the Service Manual, explains special terminology and conventions, and provides complete GMM specifications.

•Chapter 2. Theory of Operation describes the GMM’s circuitry in terms of functional blocks, with a description of each block’s role in overall operation. A detailed circuit description is then given for each block.

•Chapter 3. General Maintenance provides information on general maintenance, handling precautions and disassembly instructions. Instructions covering warranty repairs and shipping the instrument to a service center are also contained in this chapter.

•Chapter 4. Performance Testing and Calibration contains information on required test equipment, performance test procedures and calibration of the GMM.

•Chapter 5. List of Replaceable Parts describes parts used in the GMM along with ordering information.

•Chapter 6. Schematic Diagrams contains a full set of schematic diagrams and component locators.

1-5

867B,863

Service Manual

Specifications

1-9.

General

Display: LCD - Dot Matrix, 240 X 200 pixels

Fluke 867B: Transmissive, Backlit

Fluke 863: Reflective

Temperature Operating: 0°C to 50°C (See Figure 1-1.)

Storage: -20°C to 60°C (Batteries Removed)

Charging: 0 to 45°C

Temperature Coefficient: (0.1 X % Accuracy) per °C (0°C to 18°C and 28°C to 59°C)

Relative Humidity: 0% to 90% non-condensing

Altitude Operating/Non-operating: 6,562 ft. (2,000 meters)/ 40,000 ft. (12,200 meters)

Input Impedance: 10 MΩ

Shock and Vibration: per MIL-T-28800, class 3, sinusoidal, non-operating

Dimensions: 5.4 x 9.7 x 2.7 in. (137 x 246 x 68 mm)

Weight: 3 lbs (1.35 kg)

Battery Operating Time (backlight off or low)

Alkaline: 8 hours typical

NiCd:

863:	10 hours typical
867B:	8 hours typical

Battery Recharge Time: 16 hours minimum from full discharge

Drip Proof Case: per IEC 529; IP 52, Drip Proof

Safety: Designed to meet IEC 1010-1 Category III, UL3111, CSA-C22.2. 1010-1-92, CE and TUV requirements

Certification:

Electromagnetic Interference

RF Emissions EN-50081-1 Commercial Limits

VFG 243-1991

FCC Part 15 Class B,

RF Susceptibility: EN 50082-1 Industrial Limits

1-6

Introduction and Specifications	1
Specifications

	100
	90
	80
	70
	60
%RH	50
	40
	30
	20
	10
	0
	-20	0	20	40	60	80	100	120	140
		-4		32
				Temperature (°F)
		-20		0		30	40	50	60
				Temperature (°C)
				= Storage (-20°C — 60°C)

= Normal Operation (0°C — 50°C)

os1f.eps

Figure 1-1. Temperature and Humidity

Power

		Fluke 867B	Fluke 863
	Battery Eliminator/Charger	Yes	Optional Eliminator only
	NiCd Battery Pack	Yes	Optional BP7217 Battery
			Pack
			Optional BC7210 Ext.
			Charger
	Alkaline Batteries 6 AA Cells	Optional Customer Supplied	Yes
	Battery Life: NiCad	≥8 hrs (supplied)	≥10 hrs (optional)
	Alkaline	≥8 hrs (optional)	≥8 hrs (supplied)

1-7

867B,863

Service Manual

Resolution and Accuracy

The following specifications apply within 1 year of calibration when operating in a temperature range of 18°C (64°F) to 28°C (82°F).

AC Volts (True RMS, AC-Coupled) [±(percent of reading + counts)]

				Frequency
Range	Res.
		20 -	50 -	1 kHz -	30 kHz-	100kHz-	200 kHz-
		50 Hz	1 kHz	30 kHz	100 kHz	200kHz	300 kHz
300.00 mV	0.01 mV	1.5% + 10	0.5% + 10	0.5% + 10	4% + 200	8% + 200	10%+ 200
		0.19 dB	0.10 dB	0.10 dB	1.39 dB	1.68 dB	1.82 dB
3.0000V	0.1 mV	1.5% + 10	0.5% + 10	0.5% + 10	4% + 200	8% + 200	10%+ 200
		0.19 dB	0.10 dB	0.10 dB	1.39 dB	1.68 dB	1.82 dB
30.000V	1 mV	1.5% + 10	0.5% + 10	0.5% + 10	4% + 200	8% + 200	10%+ 200
		0.19 dB	0.10 dB	0.10 dB	1.39 dB	1.68 dB	1.82 dB
300.00V	10 mV	1.5% + 10	0.5% + 10	0.5% + 10	4% + 200	8% + 200	10%+ 200
		0.19 dB	0.10 dB	0.10 dB	1.39 dB	1.68 dB	1.82 dB
1000.0V	100 mV	1.5% + 10	1.5% + 10	NA	NA	NA	NA
		0.19 dB	0.19 dB

300 mV - 300V ranges ≥3:1, 1000V range ≥3:1 decreasing to ≥1.41:1 as input voltage increases to 1000V (peak voltage not to exceed 1414V).

Measurement Range: 300 mV range from 10% to 100% of range. 3V - 1000V ranges from 5% to 100% of range.

For frequencies > 100 kHz 30% to 100% of range (all ranges).

1-8

					Introduction and Specifications			1
						Specifications
	AC Volts - Average Responding AC Coupled [±(percent of reading + counts)]
				Frequency
	Range	Res.
			20 - 50 Hz	50 - 1 kHz	1 kHz - 30 kHz	30 kH - 50 kHz
	300.0 mV	0.1 mV	1.5% + 4	0.5% + 4	0.5% + 4	2% + 4
			0.25 dB	0.16 dB	0.16 dB	0.25 dB
	3.000V	1 mV	1.5% + 4	0.5% + 4	0.5% + 4	2% + 4
			0.25 dB	0.16 dB	0.16 dB	0.25 dB
	30.00V	10 mV	1.5% + 4	0.5% + 4	0.5% + 4	2% + 4
			0.25 dB	0.16 dB	0.16 dB	0.25 dB
	300.0V	100 mV	1.5% + 4	0.5% + 4	0.5% + 4	2% + 4
			0.25 dB	0.16 dB	0.16 dB	0.25 dB
	1000V	1 V	1.5% + 4	1.5% + 4	NA	NA
			0.25 dB	0.25 dB

Input Impedance: 1.11 MΩ ±1% in series with 0.1 µF

Volts-Hertz Product: 2 x 107

Common Mode Rejection: >60 dB at 50 Hz and 60 Hz (1 kΩ unbalance)

Common Mode Volts-Hertz Product: 1 x 107

dBm Reference: 2, 4, 8, 16, 50, 75, 93, 110, 125, 135, 150, 300, 600, 900, 1000, and 1200Ω

Overload Protection: 1000V rms

DC Volts [±(percent of reading + counts)]

Function	Range	Res.	Fluke 867B	Fluke 863
mV DC	300.00 mV	0.01 mV	0.025% + 2	0.04% + 2
	3000.0 mV	0.1 mV	0.025% + 2	0.04% + 2
	30.000V	0.001 V	0.025% + 2	0.04% + 2
V DC	300.00V	0.01 V	0.025% + 2	0.04% + 2
	1000.0V	0.1 V	0.025% + 2	0.04% + 2

Input Impedance: V DC-10 MΩ, mV DC-10 MΩ, mV DC Hi-Z ->1000 MΩ

Normal Mode Rejection: >60 dB at 50 Hz or 60 Hz

Common Mode Rejection: >120 dB a dc, >90 dB at 50 Hz and 60 Hz (1 kΩ unbalance)

Overload Protection: 1000 V rms

Maximum Allowable Peak AC + DC Voltage (without causing a reading error) 300 mV, 3000 mV ranges: 15V

30V range: 1000V; 300V, 1000V ranges: 1414V

1-9

867B,863

Service Manual

Diode Test (Manual)

Range: 3V

Resolution: 0.0001V

Accuracy: ±0.05% of reading + 2 digits

Open Circuit Voltage: 3.1V

Diode Test (Auto)

Accuracy: 20%

Current Ranges

Ranges for True	True RMS		Ranges for Average
	Measurement Range			Maximum
RMS AC Current			Responding AC		Fuse
	(% Range to % Full			Burden
and DC Current			Current		Protection
	Scale)			Voltage
300.00 A1	5% - 100%		300.0 A	0.03V	440 mA @
					1000V
3000.0 A1	5% - 100%		3000 A	0.3V	440 mA @
					1000V
30.000 mA	5% - 100%		30.00 mA	0.03V	440 mA @
					1000V
300.00 mA	5% - 100%		300.0 mA	0.3V	440 mA @
					1000V
3.0000A	5% - 100%		3.000A	0.1V	11A @
					1000V
10.000A	5% - 100%		10.00A	0.3V	11A @
					1000V
1. DC ranges available on the Fluke 867B only.

DC Current Accuracy [±(percent of reading + counts)]

	Range	Resolution	Accuracy
	300 A1	0.01 A	0.1%	+ 15
	3000 A1	0.1 A	0.1%	+ 2
	30 mA2	1 A	0.05% + 15
	300 mA	10 A	0.1%	+ 2
	3A	100 A	0.2%	+ 15
	10A	1 mA	0.2%	+ 2
1.	Ranges available on the Fluke 867B only.
2.	Fluke 863 30 mA DC range accuracy 0.1% + 15.

AC Current Accuracy [±(percent of reading + counts)]

Range	Resolution		True RMS AC Current Accuracy (Average AC counts)2
	True RMS	Avg.	20 Hz to	50 Hz to	3 kHz to	10 kHz to
			50 Hz	3 kHz	10 kHz	30 kHz
300 A1	0.01 A	0.1 A	1% + 10 (4)	0.75% + 10 (4)	2% + 20 (4)	2% + 40 (4)
3000 A1	0.1 A	1 A	1% + 10 (4)	0.75% + 10 (4)	2% + 20 (4)	2% + 40 (4)
30 mA	1 A	10 A	1% + 10 (4)	0.75% + 10 (4)	2% + 20 (4)	2% + 40 (4)
300 mA	10 A	100 A	1% + 10 (4)	0.75% + 10 (4)	2% + 20 (4)	NA
3A	100 A	1 mA	1% + 10 (4)	0.75% + 10 (4)	NA	NA
10A	1 mA	10 mA	1% + 10 (4)	0.75% + 10 (4)	NA	NA

1. Ranges available on the Fluke 867B only.

2. Replace counts with Average AC counts for Average Responding AC measurements. In 300 A range, floor count increases to 20 with battery eliminator.

1-10

Introduction and Specifications	1
Specifications

Conductance [±(percent of reading + counts)]

Range	Resolution		Accuracy	Open Circuit
				Voltage
300.00 nS	0.01 nS		0.5% + 20	3.2V
3000.0 nS	0.1 nS		0.5% + 20	3.2V
Overload Protection: 1000V rms

Capacitance [±(percent of reading + counts)]

Range		Resolution	Accuracy
10000 pF1		10 pF	1.9%	+ 20
.1000 µF		100 pF	1.9%	+ 2
1.000 µF		1 nF	1.9%	+ 2
10.00 µF		0.01 µF	1.9%	+ 2
100.0 µF		0.1 µF	1.9%	+ 2
1000 µF		1 µF	1.9%	+ 2
10000 µF2, 3		100 µF	10% + 900
Overload Protection:	1000V rms

1.10,000 pF range last digit reads zero.

2.10,000 µF range last two digits read zero.

3.Using REL to zero internal offset.

Continuity Beeper Values

Range	Beeper On	Beeper Off
300Ω	32Ω	136Ω
3 kΩ	212Ω	725Ω
30 kΩ	1586Ω	4799Ω
300 k Ω	15.3 kΩ	45.5 kΩ
3 MΩ	152.7 kΩ	459.1 kΩ
30 MΩ	66 kΩ	194 kΩ

Resistance [±(percent of reading + counts)]

Range	Resolution	Accuracy		Maximum	Open Circuit
				Current	Voltage
300.00Ω	0.01 Ω	0.07%	+ 10	1 mA	3.2V
3.0000 kΩ	0.1 Ω	0.07%	+ 2	120 µA	1.5V
30.000 kΩ	1 Ω	0.07%	+ 2	14 µA	1.5V
300.00 kΩ	10 Ω	0.07%	+ 2	1.5 µA	1.5V
3.0000 MΩ	100 Ω	0.15%	+ 2	150 nA	1.5V
30.000 MΩ	1 kΩ	0.2% + 3		320 nA	3.2V

1-11

867B,863

Service Manual

Frequency

AC Sensitivity

AC Volts			AC Current
Frequency	Sine Wave	Frequency	Ranges	Sine Wave
	Level			Level
2 Hz - 500 kHz	60 mV rms	5 Hz - 30 kHz	300 A - 300 mA	20% of range
500 kHz - 1 MHz	100 mV rms	5 Hz - 2 kHz	3A	300 mA
1 MHz - 2 MHz*	1V rms	5 Hz - 2 kHz	10A	3A

* Use single trigger mode for inputs above 1 MHz.

Accuracy [±(percent of reading + counts)]

Range	Resolution	Accuracy
1000.00 Hz	0.01 Hz	0.05% + 2
10.0000 kHz	0.1 Hz	0.05% + 1
100.000 kHz	1 Hz	0.05% + 1
1.00000 MHz	10 Hz	0.05% + 1
2.0000 MHz	100 Hz	0.05% + 1

Duty Cycle

Range: 0.1% to 99.9%

Accuracy: ±(5.2% divided by the pulse width in microseconds + 2 counts) (1 ms = 1000 microseconds).

Period

Ranges: 999.99 s, 9.999 ms, 99.99 ms, and 999 ms

Accuracy: ±(0.05% of reading + 2 counts)

Pulse Width

Ranges: 999.99 s, 9.999 ms, 99.99 ms, and 999 ms

Accuracy: ±(5.2% divided by the pulse width in microseconds + 2 counts) (1 ms = 1000 microseconds).

1-12

Introduction and Specifications	1
Specifications

Logic (Fluke 867B Only)

Trigger Levels1

Logic Family	Low	High
3V CMOS	1.4V	1.7V
5V CMOS	2.6V	2.8V
TTL	1.7V	1.9V

1. Frequency measurements will trigger on the logic family high levels. All measurements are made using the Logic/Ext. Trig. input jack.

2. For frequency > 1 MHz use full logic level.

Frequency Measurements

Frequency	Resolution	Accuracy
1000.00 Hz	0.01 Hz	0.05% + 2
10.0000 kHz	0.1 Hz	0.05% + 1
100.000 kHz	1 Hz	0.05% + 1
1.00000 MHz	10 Hz	0.05% + 1
2.0000 MHz	100 Hz	0.05% + 1
10.0000 MHz	100 Hz	0.05% + 1

1-13

867B,863

Service Manual

Component Test

Frequency	Capacitance
2 Hz	0.72 µF to 72 µF
20 Hz	0.072 µF to 7.2 µF
200 Hz	7200 pF to 0.72 µF
2 kHz	720 pF to 0.072 µF
18.75 kHz	77 pF to 7700 pF

Peak Hold

Captures peak minimums and maximums of signals ≥10 µs.

Accuracy: ±(5% of reading + 30 counts)

MIN/MAX/AVG

Accuracy: add 8 counts to the number of counts in the accuracy table of the selected function.

View Mode Specifications

Horizontal Specifications

Sample Rate: 4.8 Megasamples per second

Sample per Division: 20 per horizontal division

Samples Captured: 512 in Single Shot and Glitch Capture; 256 all other modes

Update Rate: 4 times per second

Time Base

Modes: Single Shot and Recurrent

Ranges: From 4.2 µs per division to 5 seconds per division

Trigger

Types: Internal and External

Coupling: AC, DC and Glitch Capture

External Trigger Impedance: 1 MΩ in parallel with ≤75 pF

External Trigger Input: Logic/External Trigger Terminal

External Trigger Level: ±5V adjustable in ±10 steps

Amplitude Specifications

Amplitude Resolution: 8 bits

Frequency Response (-3 dB)

Volts DC Coupled: DC to 1 MHz

Volts AC Coupled: 3 Hz to 1 MHz

Input Impedance

Refer to the meter mode specifications

Glitch Capture

Glitch Trigger Level: 20% of range 300 mV - 300V

6% of range 1000V

Minimum Glitch Time: 1 µs

1-14

Chapter 2

Theory of Operation

	Title	Page
2-1.	Introduction.............................................................................................	2-3
2-2.	Start-Up Sequence ..............................................................................	2-3
2-3.	Function Selection ..............................................................................	2-3
2-4.	Power Supply ..........................................................................................	2-4
2-5.	Power Supply Input Voltages .............................................................	2-4
2-6.	Power Supply Output Voltages and Currents.....................................	2-6
2-7.	Power Supply Signals .........................................................................	2-7
2-8.	Power ON/OFF Requirements............................................................	2-8
2-9.	NiCd Charging Requirements.............................................................	2-8
2-10.	Battery and Line Level Detection.......................................................	2-8
2-11.	Power Supply Functional Blocks............................................................	2-9
2-12.	Input Power Selector (A)....................................................................	2-9
2-13.	Boost Preregulator (B)........................................................................	2-10
2-14.	Battery Charger (C) ............................................................................	2-10
2-15.	DC-DC Converter (D) ........................................................................	2-12
2-16.	Backlight Current Sink (E) .................................................................	2-12
2-17.	Power Switch Circuitry (F).................................................................	2-12
2-18.	LCD Contrast Control (G)..................................................................	2-12
2-19.	Power-On Reset Circuit (H) ...............................................................	2-12
2-20.	Linear Post Regulators (I)...................................................................	2-13
2-21.	Input Overload Protection.......................................................................	2-13
2-22.	Volt/Ohms Input Protection................................................................	2-13
2-23.	External Trigger and Logic Activity Input Protection........................	2-14
2-24.	Amps / mA / A Input Protection.......................................................	2-14
2-25.	Input Signal Conditioning.......................................................................	2-14
2-26.	AC Volts .............................................................................................	2-14
2-27.	DC Volts .............................................................................................	2-16
2-28.	mV DC................................................................................................	2-16
2-29.	Ohms...................................................................................................	2-17
2-30.	Diode Test...........................................................................................	2-17
2-31.	Capacitance.........................................................................................	2-17
2-32.	mA/ A ................................................................................................	2-18
2-33.	Amps...................................................................................................	2-18
2-34.	Waveform Processing .............................................................................	2-19
2-35.	Overview.............................................................................................	2-19
2-36.	Detailed Description...........................................................................	2-19

2-1

867B,863

Service Manual

2-37.	Waveform Triggering..............................................................................	2-20
2-38.	Overview.............................................................................................	2-20
2-39.	Dual Trigger........................................................................................	2-20
2-40.	Single Trigger .....................................................................................	2-21
2-41.	External Trigger..................................................................................	2-21
2-42.	Glitch Capture.....................................................................................	2-22
2-43.	Single Shot..........................................................................................	2-22
2-44.	Frequency Trigger ..............................................................................	2-22
2-45.	Logic Activity Trigger........................................................................	2-22
2-46.	Peak Hold................................................................................................	2-22
2-47.	Auto Diode..............................................................................................	2-22
2-48.	Component Test ......................................................................................	2-23
2-49.	Digital Circuitry ......................................................................................	2-24
2-50.	RS-232 Serial Port ..................................................................................	2-24

2-2

Theory of Operation 2

Introduction

Introduction

2-1.

This chapter describes the functional blocks shown in Figure 2-1. Overall descriptions are broken down into Power Supply, Analog Circuitry, and Digital Circuitry.

For all measurements, inputs (e.g., Ëand â) are applied through overvoltage (and overcurrent) protection circuits, switched to an appropriate range, and branched into two signal paths. One path leads first to a Fast A/D Converter (8-bit, 4.8-MHz sample rate) that digitizes the data, then to a digital gate array that stores and processes the data. The other path leads to a Slow A/D Converter (high accuracy, dual slope) in the U30 custom IC. The microprocessor takes data from both the Slow A/D Converter (U30) and the custom digital IC (U24) storage to simultaneously display a waveform and a 4-1/2 digit meter reading. Power supplies include 5.2V dc and -5.2V dc for analog circuitry, 3.3V dc for digital circuits, and VEE (nominally -23V dc) for the LCD module.

Start-Up Sequence

2-2.

The GMM sequences through the following steps when power is applied:

•The 3.3V power supply comes up.

•The reset pin on the microprocessor (U25-1) goes high.

•The microprocessor (U25) begins executing the program stored in EEPROMs U11 and U19.

•LCD controller (U13) data is initialized.

•VEE is turned on (-20V dc), and the display comes on.

Function Selection

2-3.

When the selector is turned to a new function, a rotary switch wiper sets up a resistor divider by grounding the selected resistor in series with R170. The resulting voltage is read by the microprocessor (U25-83).

2-3

867B,863

Service Manual

Power Supply

2-4.

The GMM can be powered with a Fluke BP7217 rechargeable battery pack (6 - 4/3A NiCd cells), 6 AA alkaline batteries, or a battery eliminator. The GMM automatically detects power by source (NiCd battery pack, AA alkaline batteries, or battery eliminator.) Diodes provide reverse polarity protection for the batteries.

The NiCd battery pack recharges in a minimum of 16 hours when the GMM is not operating or at a trickle rate while the GMM is operating. Only cells in the Fluke BP7217 battery pack can be charged internally. Internal charging is not available with Model 863.

			Caution
	Do not attempt to place other batteries in the BP7217 battery
	pack; damage to the batteries could result.
	A low battery indicator (		) comes on when battery voltage drops below a preset
		+
	voltage level. This level is the same for all types of batteries: remaining battery life can
	vary from minutes to hours, depending on battery type, ambient temperature, and battery
	history. A low-battery power down can also occur. (No automatic power down occurs
	when the GMM is powered by the battery eliminator.)
	Refer to Chapter 1 for battery and battery eliminator specifications.
	Power Supply Input Voltages			2-5.
	Refer to Table 2-1.
		Table 2-1. Power Supply Inputs
	Input Source		Voltage	Lifetime (w/o Backlight)
	Line		12 ±5% volts	--
	NiCd Battery Pack (Fluke BP7217)		6-10 volts	867B : ≥ 8 hrs typical
				863: ≥ 10 hrs typical
	Alkaline (6-AA)		5.5-10 volts	≥ 8 hrs typical

2-4

U11

SWCrtl10

LCD Module - Drivers,

10Bit DAC

LCD

SWCtrl3

240 x200, Backlight

Contrast

Component

SWControl

To/From uProcessor

Adjust

DACData

Ohms/

UART

Test Source

Capacitance

ADControl

ADControl

To/From

Source

4 1/2 Digit

Volts/ohms

Protection

DC Filter

Multiplexer

A/D

U21

U13

RS-232

DC Input

SRAM

LCD Controller

32 x 8

To/From

Attenuation

1335

Dsiplay

5.2 volts

RIC

-5.2 volts

SWCrtl0

SWCrtl1

3.27 volts

2 Frequency

LCD Voltage VEE

Counters

I/O

Block.1-2Figure

SupplyPower

BATTELIM

AC Input

DC Level

Circuitry

(25 bits)

Keyboard

U25 MICROPROCESSOR H8

INT1

U3 RMS

To uProcessor A/D

Attenuation

Reference

Module

BATTTYPE

Converter

CLK

& x10 gain

Counter

I/O

To uProcessor A/D

(25 bits)

EEPROM

BATTLVL

DACL1

Dual

Divide by

To uProcessor A/D

ACR1-4

Comparators

DACL2

POWER_DOWN*

Circuitry

Data

Status and

From uProcessor

Trigger

Control Regs

Addr

Diagram

Attenuation

(Comp.Test

SWCrtl13

Min

Compare

Acquisition Cnt.

U11, U19

DAC)

4.8 MHz

(Trigger) Circuit

Logic Activity/

ROM

2 128 x 8

External Trigger

Combination/

Logic Activity/

Filter

U10

External

x1/10,x1,x10

Flash A/D

Addr

Trigger

Multiplexer

Circuit

DACL1

8 bit/10 Mhz

Max

Compare

Data

512 x 8

DAC1

Acq.

IR1

Ram

uA

mA/A

SWCtrl6

DACL2

DAC2

mA/uA

Current

SHUNTS

Rotary

Wakeup* to Power Supply

AMPS

Switch

Switching

To uProcessor A/D

COM

Component

U20

Test

RIC Function Blocks - U30

SRAM

Volts/Ohms/Current

Current to

32k x 8

Component Test

Voltage

DIC Function Blocks - U24

System

eps..os2f

5-2

2 Operation of Theory

Supply Power

867B,863

Service Manual

Power Supply Output Voltages and Currents							2-6.
	Refer to Table 2-2.
			Table 2-2. Power Supply Outputs
Name	Voltage	Tol ± V	Tol ±%	Ripple	mA	Power	Notes
				(peak to
				peak)
VDD	5.2V	0.26	5.0%	50 mV rms**	43 mA	224 mW	0.2V p-p maximum noise
							to 1 MHz BW
VAD	3.27V	0.07	2.0%	50 mV rms**	12 mA	40 mW	±0.02%/C max
VCC	3.27V	0.07	2.0%	50 mV rms**	82 mA	271 mW	VAD and VCC are tied
							together, unregulated
							DC used for IBL+
VSS	-5.2V	0.26	5.0%	50 mV rms**	32 mA	166 mW	0.2V p-p maximum noise
							to 1 MHz BW
VEE	-20V			na	5 mA	115 mW	TC = -38 mV/°C, center
							value adjusted and
							stored at test
IBL+ *	4V		±15%	na	80 mA	264 mW	current for backlight
							LED, ±15%
IBL-				na			Current Return for IBL+,
							max 1.5V burden voltage
* IBL is controlled by a linear current source taken from unregulated DC.
** Measured with an 8842A in AC rms mode.

2-6

			Theory of Operation		2
			Power Supply
	Power Supply Signals		2-7.
		Table 2-3. Power Supply Signals
	Signal Name	Description
	BACKLIGHT_ON*	Control signal generated by U25. In Model 867B, this signal toggles the backlight
		power levels.
	BATT_LVL	Monitors an attenuated (0 to 5V) version of the raw battery voltage. This signal is
		monitored by the U25 microprocessor A/D Converter. The attenuation factor is
		0.0909:1 with an output impedance of approximately 91 kΩ.
	BATT_TYPE	Monitors an attenuation level of the battery charging voltage. The attenuation ratio is
		0.0901:1 with an output impedance of approximately 91 kΩ. If the measured voltage
		is greater than 11 volts, the battery is assumed to be an alkaline cell. Voltages 10.5
		volts and below indicate that a Fluke BP7217 battery pack has been installed.
	BATT_ELIM	This is a contact on the battery eliminator input receptacle. It is pulled to LINE with 5
		kΩ and tied to GND4 through 475Ω, forming a 10.51:1 divider. If open (voltage
		>1.0V), a line-powered battery eliminator has been installed. If closed (shorted to
		ground), the battery eliminator is not plugged-in or is not powered.
	CONTRAST	PWM signal from U25. The frequency is set at U25_SYSCLK/(CLOCK_DIVIDER x
		COUNTER_LIMIT), yielding 4.8 MHz/(4 x 4096), equaling 293 Hz. The PWM signal
		has 12-bit resolution, which can vary the duty cycle from 0 to 100%.
	IBL+	Current source generated by power supply used to run the LCD backlight. Current
		source is controlled by the BACKLIGHT_ON* control signal. Typical current level is
		80 mA. This is the sourcing node derived from unregulated DC, typically +6.0V
		(5.8V minimum.)
	IBL-	Current return for IBL+, with approximately 1V burden.
	POWER_DOWN	Powers down the GMM. Signal is generated by U25. This signal shuts the GMM off
		completely. Pulled-down to GND with 20	kΩ.
	PWR_RESET*	Signal generated by the power supply when the VCC power supply drops below 3.0
		volts. The reset lasts 100 milliseconds minimum. If the selector is left in the OFF
		position or the GMM is powered down, the PWR-RESET* signal restarts the 100 ms
		time-out period. This signal is pulled up to VCC by 10 kΩ .
	VEE_ON	Control signal generated by U25. Turns the VEE power supply on and off. Pulled
		down to ground by 100 kΩ .
	WAKEUP*	This signal is generated by both the rotary selector switch and the WAKEUP button.
		Upon going LOW, followed by a return to HIGH, the GMM powers up. In the OFF
		position, this feature is overridden by the OFF switch.

2-7

867B,863

Service Manual

Power ON/OFF Requirements

2-8.

The GMM is turned off when the selector is rotated to OFF. If the selector is immediately rotated beyond OFF, the GMM does not turn off. If the selector remains in OFF for 125 ms, GMM software recognizes a valid OFF signal. If the selector remains in the OFF position for more than 250 ms and an OFF signal is not generated, a hardware timeout occurs and the GMM powers off.

The signal PWR_RESET* goes true (LOW) immediately when a software OFF signal or hardware timeout is generated. This action forces a complete restart sequence, with PWR_RESET* remaining low for at least 100 ms.

After a software OFF signal has occurred, turn the GMM on by rotating the selector to any function or by pressing 9(the WAKEUP button.). If a hardware timeout has occurred, pressing 9does not turn the GMM on; the selector must be rotated to a new function.

NiCd Charging Requirements

2-9.

Models 867B use an internal two-state charger. The initial charge state is at approximately 170 mA (±30 mA) to allow for full overnight charging (16 hours minimum). The second charge state is at approximately 40 mA (±15 mA) to allow for battery charge maintenance without full charging from a discharged condition.

A timer (reset each time the battery eliminator is plugged in) controls the charge state. The rate shifts to 40 mA after approximately 16 hours of accumulated charge time.

The 40-mA rate is used with batteries below approximately 6 volts to limit the amount of power dissipated when a completely dead battery pack is used. After this 6-volt cutoff point has been reached, the GMM starts charging at 170 mA.

Battery and Line Level Detection

2-10.

The BATT_LVL signal is an attenuated version of the battery and charging voltages. Table 2-4 summarizes the values to be used by the software to control LOW BATTERY detection and SOFT SHUTDOWN. After LOW BATTERY is detected, the backlight is turned off and backlight control is disabled.

2-8

					Theory of Operation			2
					Power Supply Functional Blocks
		Table 2-4. Power Source Detection
	POWER TYPE	DETECTION		LOW BATTERY	SOFT POWER-	SCALE
					OFF	FACTOR
	Battery Eliminator connected	BATT_ELIM		na	na	0.0951
		≥ 1.0 Volts
	NiCd Battery Pack installed	BATT_TYPE		6.2V	5.7V	0.0909
		5 ≤ V ≤10.5 Volts
	Alkaline (AA) Batteries installed	BATT_TYPE		6.2V	4.8V	0.0909
		V ≤ 4.5 or
		V ≥ 11 Volts
Power Supply Functional Blocks						2-11.

Refer to the Schematic Diagram in Chapter 7 during the following discussion. The power supply consists of the circuit blocks listed below. Each block is identified with a letter (A-J) keyed to Figure 2-2.

•Input power selector (A)

•Boost Preregulator (B)

•NiCd battery charger and timeout (C)

•DC-DC Converter (D)

•Backlight current sink (E)

•Power switch, wake-up and power down circuitry (F)

•LCD contrast control and temperature compensator (G)

•Power on reset (H)

•Linear post-regulators (I)

•+5 volt bias supply (J)

Input Power Selector (A)

2-12.

The input power selector automatically selects either battery eliminator power (line) or battery. If a battery eliminator is connected to the GMM, +12 volts (±5%) is applied through line filter FL1 to the anode of CR21. This 12 volts turns on Q13, which pulls down the gate of Q14, turning it on. Current can then flow from the battery eliminator to the boost circuit (B). Note that CR22 is back-biased.

If an eliminator is not connected, Q13 is off. Current is not allowed to flow through Q14 until Q12 is turned on. Q12 is turned on when enough voltage remains on the battery to supply the bias regulator (J) and the power wake-up circuitry is enabled. When the GMM is off (with no eliminator connected), Q14 is off and only the bias supply draws current. The maximum off-state current draw is 100 A.

CR21 and CR22 perform the power selection process.

2-9

867B,863

Service Manual

Boost Preregulator (B)

2-13.

The boost preregulator outputs +15 volts from an input of +12 volts from the battery eliminator or 5.5 to 10 volts from the battery.

U27 provides this boost in conjunction with L1, CR20, and C3. If U27 is not functioning, the voltage at the positive of C3 is approximately 0.4 volts below the voltage on C90. R114 provides peak current limiting to prevent rapid burnout of the boost circuit in the event of an overload. Since R114 requires a functional U27, it does not provide complete protection. R12 and R73 set the output voltage, while the other discrete components provide timing and compensation for the regulator.

The output of this stage is delivered to the NiCd battery charger (C) and to the DC-DC converter (D). R125 allows the charger and boost circuit to be tested independently of the rest of the GMM. R125 is especially useful if a large load causes <15 volts at the cathode of CR20.

Battery Charger (C)

2-14.

The battery charger consists of the following two sections:

•Q22 and its associated components provide a linear current source of either 170 mA or 40 mA to charge the NiCd battery. Transistors Q1, Q2, Q3, Q6, and Q11 provide logic control of the charger state.

•The other part of the circuit is U32 and its associated components, which provide a timeout of at least 16 hours to prevent continuous overcharging of the battery. This circuit is reset each time a battery eliminator is plugged in (via U34, R141, R140 and C91).

A full charge of approximately 170 mA can only be provided to the battery if Q1, Q2, and Q6 are turned on, Q3 is off, and Q11 is off. These states correspond to the GMM being connected to line but turned off and U32 not being timed out. U32 is inhibited from advancing by CR5 when power is on.

VR1 prevents Q2 from turning on until the battery voltage rises above about 5.8 volts. This prevents excessive power dissipation in Q22 with a dead battery or shorted cells.

Note

The Fluke battery pack (BP7217) uses an extra wire to allow charging current to flow. If individual batteries are installed, no connection is made, and no charging current can flow.

2-10

FL1

LINE

CR21

A

B

CR20

1N5817

L1

1N5817

R125

P3

B

B

CB

CB

1

2

E

1

PSG

CG1

1

2

3

5

6

7

8

R12

330UH

0

P3

GND

C60

C90

2

140.0K

P3

10UF

Q14

220UF

BACKLIGHT

3

35V

R137

SI9430DY

25V

4

20%

C3

100K

D

8

CURRENT SINK

D

D

C59

220UF

VDD

VS

CR22

R122

2200PF

1

INM

COL

6

20%

1N5817

10K

10K

221K

CER

2

INP

EMIT

5

D

80 MA

POK-1

3

7

R106

C23

OSC

GND CLIM

IBL-

Q13

Q12

R73

C56

U27

3.24K

22PF

4

R114

MUN2211

MUN2211

10.0K

CER

680PF

LM3578AN

0.2

Q21

R7

CER

D

R158

IBL+

4401

4.99K

D

D

47

BATT_ELIM

+15

D

D

Q5

(867B only)

D

MUN2211

10K

R11

D

R6

U15

3.24K

R16

475

CR8

LM2936M

10

MMBD7000

0.2 (867B only)

+5B

R74

8

IN

OUT

1

D

D

D

R113

C85

D

1.82K

GND

12.1

R14

10UF

J

4

16V

CR9

1/2W

1.00MEG

2

3

6

7

10%

20%

BACKLIGHT_ON*

MMBD7000

R56

Q22

D

H

INT_VCC

1.00MEG

Figure

MJD32

BATT_TYPE

MUN2211

D

C

R55

BT1

BATT_LVL

3

R29

R100

6.49K

6- 4/ 3A

R69

R124

100K

24.9K

VR1

R27

6.34K

3.32M

R115

M4

100K

10.0K

5231B

LM393DT

Q2

10K

LINE

D

8

U22

PWR_RESET*

-2

R15

D

LM4040-2.5

+2.5V

2

1

RES

R28

4

100K

U31

8

RES

100K

6

.2

Q1

10K

U32

5

R81

C19

D

5

7

MUN2211

7

74HC4060DT

9

U22

Q4

CKO

R119

31.6K

10UF

C58

4

LM393DT

Power

5

R44

16V

4

RESET

10

CR19

10UF

20%

R132

1UF

Q5

10.0K

0.1UF

6

Q6

CKO*

464K

C84

LINE

D

CER

14

Q7

11

25V

D

10K

13

Q8

CKI

D

D

Q6

15

Q10

R68

10UF

R141

INT_VCC

MUN2211

1

Q12

1.00MEG

20%

+5B

100K

Q23

2

Q13

16V

C9

3

Q14

AL

4401

C2

D

U34

1N5817

16V

R72

VCCDRIVE

3.24K

20V

20%

Supply

12

4

R140

475

6

HC132

5

66.5K

D

7

6

D

C91

5

CR15

+5B

CR18

U2

R128

R52

1UF

C21

1N5817

MC33172

VDD

20V

D

1UF

10.0K

0

+5.2

Q3

10K

MMBD7000

20V

C88

INT_VDD

TP4

R87

D

MUN2211

Q18

VAD

CR5

D

1UF

D

TP5

0

CR12

D

4401

20V

MMBD7000

BAV74

Blocks

10K

35V

MMBD7000

C61

10.0K 10.7K R19 10.0K

Q10

Q17

C62

0

0

D

4403

R133

R123

5087

R41

INT_VSS

0

-5.2

+3.3

Q11

U34

D

20V

475

R89

1.82K

6429

221K

6V

10.0K

RIC_VCC

MUN2211

1

C65

2

R143

R43

R8

CONTRAST

2

3

POK-1

D

1

100K

221K

10.0K

D

20V

3

R116

VEE_ON

+5B

7

1

U4

R39

5.62K

M1

+5B

CR14

C94

Q16

2

MC33172

TP1

VDDDRIVE

R48

VSS

BAT54S

1UF

SI9955DY

8

3

Q19

R126

U33

7

C12

R142

LCD

1.00MEG

R10

1

8

4

D

+REG

D

1UF

1

9

U34

8

R138

CR25

12

10

Q

9

C57

R36

R23

D

2

9

5

C63

R13 10.0K

20V

100K

Q20

CONTRAST

10.0K

D PR

10

100K

12

U34

HC74

0.01UF

475

22.1

3

6

0.22UF

475

CONTROL

HC132

BAT54

5

6

CER

R46

6429

D

TP6

5

3

OFF

S1

+5B

C22

HC132

11

11

CER

T1

CR17

8

6

D

D

R120

G

MECCA CLIP TP

R139

13

+5B

C24

D

R94

7

R9

59.0K

470PF

R17

R26

4

RITA-6303

MMBD7000

475

U4

5

INT_VDD

1.00MEG

CER

+5B

8

18.7K

C10

1%

CL

Q

0.01UF

475

22.1

MC33172

4

8

VCCDRIVE

TP2

D

R131

D

VR2

VDDDRIVE

D

INT_VSS

3

1UF

D

13

CER

1

VEE

1000PF

20V

R130

+5B

10.0K

R127

-REG

2

U2

Power

10.0K

-24V

C104

D

POK-1

CR10

5240B

C1

C34

4

MC33172

U33

4

BAT54S

1UF

0.22UF

R50

1000PF

D

CR6

35V

R117

CER

316K

CER

5

Q

PR D

2

R57

D

MMBD7000

D

475

C103

HC74

100K

D

TP3

3

WAKEUP*

CER

100K

6

I

TPS ARE 40MIL PADS

C107

Q

C71

BlocksFunctionalSupply

CL

eps.os3f

1UF

OperationofTheory

1000PF

1

35V

CER

PUT CAP AT

D

C106

SHIELD SCREW

Q30

10K

POWER_DOWN

1000PF

WP1

CER

F

MUN2211

C105

C117

1000PF

47PF

CER

CER

D

5%

D

3

D

11-2

2