Equipment information
Fluke 732B Power supply
Manufacturer:
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Model:
732B
Date:
1992
Category:
Group:
Description:
DC Reference Standard
Information
Model 732B is a dc voltage laboratory standard that produces
reference voltages of 10V
and 1.018V. Model 734A contains four 732B DC Standards in a
chassis. The 732B is
highly stable, rugged and transportable. Its 10V output
excels in stability, and can be
used as your direct link in the traceability chain to
national standards. You can use the
732B 1.018V output to transfer the "volt" at the 1.018V
level from one set of saturated
standard cells to another. You can also use the 1.018V
output as a working standard with
older equipment that requires a standard cell voltage input.
The 10V output’s long-term stability, predictable drift
rate, low uncertainty, convenient
level, and immunity to accidental damage make the 732B or
734A the preferred artifact
for maintaining a local standard of voltage. With time
characterization (Calibration
Option 732B-100) the drift rate for the 10V output is given.
This reduces the 10V output
uncertainty from 2 ppm/year to 1 ppm/year.
All outputs of the 732B can withstand short circuit
indefinitely, without damage to the
instrument or disruption of the state of calibration.
Recovery time for a momentary short
is less than 2 minutes; for an extended short, recovery time
is less than 2 hours.
To maintain calibration as a traceable standard, the 732B
must continue to receive
uninterrupted operating voltage from ac line power or from
the internal battery. If
battery voltage drops too low, the front panel IN CAL
indicator goes out and
recalibration is required.
The internal rechargeable battery (if switched on) protects
the standard from line power
interruption and provides power for hot shipment (shipment
under power). The 732B
outputs are unaffected as you change between battery or ac
line power. Battery operation
with a fully charged battery lasts at least 72 hours. You
can extend battery operation by
connecting an external 12V battery such as Model 732B-7001
to the rear panel
MONITOR/EXT BAT IN connector. Plugging the 732B into ac line
power for 24 hours
fully recharges the internal battery.
Four front panel indicators show operating status. Model
732B-7001 External Battery
and Charger has all but the IN CAL indicator.
· AC PWR lights when the 732B is connected to ac line power.
· IN CAL goes out to warn you when the 732B may have lost
its calibration. This
indicator responds to an excessively large drop in battery
voltage or a large change
in oven temperature. If battery voltage falls below the
level needed to keep the 732B
working normally, the IN CAL indicator extinguishes,
indicating a loss of the state
of calibration. Once power is restored and the output has
been verified, you can reset
the IN CAL indicator.
· LOW BAT blinks to warn you to plug the line cord into ac
power when only a few
hours of battery operation remain.
· CHARGE lights when the battery is being recharged in
constant-current charge
mode, and is off when the battery is charged to the 90%
level. At 90% of full charge,
a float charge completes and maintains full charge.
Manual Type:
Service and User Manual
Pages:
124
Size:
1.49 Mbytes (1561134 Bytes)
Language:
english
Revision:
3
Manual-ID:
869321
Date:
1997 11 01
Quality:
Scanned document, all readable.
Upload date:
2017 02 04
MD5:
1fb923124ee8103e85369dec750dd778
Downloads:
1202
Information
This manual contains service and reference information
for ThinkPad G40 and G41 products. Use this manual
along with the advanced diagnostic tests to troubleshoot
problems. The manual is divided into sections as follows:
-The common sections provide general information,
guidelines, and safety information required in servicing
computers.
-The product-specific section includes service, reference,
and product-specific parts information.
Important
This manual is intended for trained service personnel
who are familiar with ThinkPad products. Use this
manual along with the advanced diagnostic tests to
troubleshoot problems effectively. Before servicing
ThinkPad products, be sure to review the safety information
under “Safety notices: multilingual translations” on
page 4, “Safety information” on page 16, and “Laser
compliance statement” on page 21.
Contents
About this manual ... .1
Introduction ... .3
Important service information ... .3
Strategy for replacing FRUs ... .3
How to use error messages ... .4
Diskette compatibility matrix ... .4
Safety notices: multilingual translations ... .4
Safety information ... .16
General safety ... .16
Electrical safety ... .17
Safety inspection guide ... .19
Handling devices that are sensitive to electrostatic discharge ... .20
Grounding requirements ... .21
Laser compliance statement ... .21
General descriptions ... .25
Read this first ... .25
What to do first ... .25
Related service information ... .28
Service Web site ... .28
Restoring the preloaded system ... .28
Passwords ... .30
Power management ... .33
Checkout guide ... .35
Testing the computer ... .35
Detecting system information with PC-Doctor . . .37
Power system checkout ... .38
ThinkPad G40, G41 ... .43
Product overview ... .45
Specifications ... .45
Status indicators ... .47
FRU tests ... .49
Fn key combinations ... .51
Symptom-to-FRU index ... .52
Numeric error codes ... .52
Error messages ... .56
Beep symptoms ... .58
No-beep symptoms ... .58
LCD-related symptoms ... .59
Intermittent problems ... .60
Undetermined problems ... .60
FRU replacement notices ... .61
Screw notices ... .61
Retaining serial numbers ... .62
Removing and replacing a FRU ... .65
1010 Battery pack ... .66
1020 Hard disk drive ... .67
1030 DIMM door ... .69
1040 DIMM ... .70
1050 Modem daughter card (MDC) ... .71
1060 Backup battery ... .72
1070 Keyboard ... .73
1080 Middle cover ... .75
1090 Hinge cover ... .76
1095 FDD assembly ... .77
1100 Blank bezel FDD assembly ... .78
1110 VGA heatsink assembly ... .79
1120 VGA card assembly ... .80
1130 CD-ROM/DVD drive and ODD bracket . . .81
1140 Mini PCI adapter ... .82
1150 PC card slot assembly ... .86
1170 LCD assembly ... .89
1180 Keyboard bezel ... .92
1190 Fan assembly ... .96
2010 CPU ... .98
2020 CD-ROM/DVD drive bracket ... .99
2030 FDD bracket ... .100
2040 System board ... .101
2050 Lower case assembly ... .102
2060 Modem cable ... .103
2070 PC card slot assembly ... .104
2080 LCD front bezel ... .105
2090 Inverter card ... .106
3000 Speaker assembly ... .107
3010 LCD cable assembly ... .110
3030 LCD panel and hinge assembly ... .111
Locations ... .112
Front view ... .112
Rear view ... .113
Bottom view ... .114
Parts list ... .115
G40, G41 series ... .115
Overall ... .139
LCD FRUs ... .146
Keyboard ... .149
Recovery CDs ... .150
Miscellaneous parts ... .153
AC adapters ... .153
Telephone cable ... .153
Optional FRUs ... .154
Common parts list ... .154
Notices ... .156
Trademarks ... .158
Manual Type:
Service and User Manual
Pages:
126
Size:
1.46 Mbytes (1534685 Bytes)
Language:
english
Revision:
3
Manual-ID:
PN 869321
Date:
Quality:
Electronic document, no scan, very well readable.
Upload date:
2014 11 29
MD5:
96c7e0dc0a8e2b24df9d3509db4519bb
Downloads:
1344
Information
1 Introduction and
Specifications ...
1-1
1-1. Introduction
...
1-3
1-2. Hardware Options
...
1-4
1-3. 734A-7001 Instrument Enclosure
... 1-4
1-4. 723B-7001 External Battery and Charger
... 1-4
1-5. Accessory Y734 Rack Mount Kit
... 1-4
1-6. Calibration Options
...
1-5
1-7. 732B-000 Special Calibration
... 1-5
1-8. 732B-100 Special Calibration and Drift Characterization
... 1-5
1-9. 732B-200 On-Site Calibration
... 1-5
1-10. Warranty Information
...
1-5
1-11. Service and Reshipment Information
... 1-6
1-12. Specifications
...
1-6
2
Installation ...
2-1
2-1. Introduction
...
2-3
2-2. Unpacking and Inspection
...
2-3
2-3. Selecting Line Voltage and Accessing the Fuse
... 2-4
2-4. Connecting to Line Power
...
2-5
2-5. Installing a 732B or 732B-7001 in a 734A-7001
Instrument Enclosure 2-5
3
Operation ...
3-1
3-1. Introduction
...
3-3
3-2. Summary of the Features
...
3-3
3-3. 732B DC Standard Front Panel
... 3-3
3-4. 732B DC Standard Rear Panel
... 3-3
3-5. 732B-7001 External Battery and Charger Front Panel
... 3-3
3-6. 732B-7001 External Battery and Charger Rear Panel
... 3-3
3-7. 734A-7001 Instrument Enclosure Front Panel
... 3-3
3-8. 734A-7001 Instrument Enclosure Rear Panel
... 3-3
3-9. Powering the Standard
...
3-11
3-10. Setting the BAT Switch
...
3-12
3-11. Charging the Internal Battery
... 3-12
3-12. Powering the Standard from a 732B-7001
... 3-12
3-13. Replacing the Internal Battery
... 3-13
3-14. Connecting Cables to the Output
... 3-14
3-15. Connecting the GUARD and GROUND
... 3-15
3-16. Monitoring Oven Temperature
...
3-16
3-17. Resetting the IN CAL Indicator
...
3-16
3-18. Monitoring The IN CAL Indicator State Remotely
... 3-16
3-19. Monitoring Long-Term Stability
... 3-17
3-20. Minimizing Error Sources
...
3-18
3-21. Mechanically Induced Errors
...
3-18
3-22. Thermal EMFs
...
3-18
3-23. Output Cable Loading
...
3-18
4 Theory of
Operation ...
4-1
4-1. Introduction
...
4-3
4-2. Overall Functional Description
... 4-3
4-3. Model 734A Functional Description
... 4-5
4-4. Model 732B-7001 External Battery/Power Supply
... 4-5
4-5. 732B Circuit Description
...
4-5
4-6. 10V Reference Circuit
...
4-5
4-7. Generating the 1.018V Output
... 4-7
4-8. Biasing the Refamp for Low Temperature Coefficient
... 4-7
4-9. Sense Current Cancellation
... 4-7
4-10. Buffering of the 10V Output
... 4-8
4-11. Oven Temperature Controller A4
... 4-8
4-12. A1 Front Panel Assembly
...
4-8
4-13. Power Supplies and Battery Charger Assembly A5
... 4-9
4-14. Overvoltage Protection Circuitry
... 4-9
4-15. Raw DC Power supply
...
4-11
4-16. Battery Charger
...
4-11
4-17. +11.5V Preregulator
...
4-11
4-18. +11.5V Low-Dropout Regulator
... 4-12
4-19. -6V Power supply
...
4-12
4-20. IN CAL Logic
...
4-12
4-21. LED Drive Logic
...
4-12
4-22. AC Power to Battery Power Switching Circuitry
... 4-13
4-23. Battery Circuit
...
4-13
4-24. Rear Panel Connections
...
4-13
4-25. Low-Battery Shutdown Circuitry
... 4-14
5 Maintenance
...
5-1
5-1. Introduction
...
5-3
5-2. Service Information
...
5-3
5-3. Replacing the Fuse
...
5-3
5-4. Cleaning the External Surfaces
... 5-3
5-5. Calibration
...
5-3
5-6. Preparing for Calibration
...
5-4
5-7. Preparing for 10V Calibration with Adjustment
... 5-4
5-8. Calibration with Adjustment
... 5-6
5-9. Calibration Without Adjustment
... 5-8
5-10. Access Procedures
...
5-9
5-11. Initial Access Procedure
...
5-9
5-12. Replacing the Battery
...
5-9
5-13. Replacing the Oven Assembly
... 5-13
5-14. Accessing the A5 Battery Charger
... 5-13
5-15. Removing the Power Transformer Assembly
... 5-13
5-16. Troubleshooting
...
5-14
5-17. 10V Reference Performance Test
... 5-14
5-18. Troubleshooting the A5 Battery Charger Assembly
... 5-14
5-19. Transformer/Rectifier/Filter
... 5-15
5-20. Battery Charger
...
5-15
5-21. +11.5V DC Preregulator
...
5-15
5-22. +11.5V DC Regulator
...
5-16
5-23. -6V DC Supply
...
5-16
5-24. IN CAL LED Logic
...
5-16
6 List of Replaceable Parts
...
6-1
6-1. Introduction
...
6-3
6-2. How to Obtain Parts
...
6-3
6-3. Manual Status Information
...
6-3
6-4. Newer Instruments
...
6-3
6-5. Service Centers
...
6-4
6-6. Parts
...
6-4
7 Schematic
Diagrams ...
7-1
A1 Front Panel
PCA ...
7-3
A2 Flex Circuit PCA
...
7-5
A3 BCD Switch PCA
...
7-6
A4 Oven Control
PCA ...
7-7
A5 Power supply
PCA ...
7-8
Index