Name: Tektronix TCP312
Brand: Tektronix
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TCPA300/400 Ampliﬁers &

TCP300/400 Series AC/DC Current Probes

ZZZ

Service Manual

This document applies for ﬁrmware version 1.0 and above.

Warning

The servicing instructions are for use by qualiﬁed personnel

only. To avoid per

sonal injury, do not perform any servicing

unless you are qualiﬁed to do so. Refer to all safety summaries

prior to performi

ng service.

www.tektronix.com

077-0323-00

Service Manual3
Table of Contents7
General Safety Summary13
Service Safety Summary16
Compliance Information17
- EMC Compliance17
- Environmental Considerations19
Preface21
- Manual Conventions21
Performance Veriﬁcation Overview23
- Performance Veriﬁcation and Functional Checks23
- Table 1: Ampliﬁer Checks23
- Table 2: Probe Performance Veriﬁcation Checks23
- Test Procedure Conditions24
- Equipment Preparation24
TCPA300 and TCPA400 Performance Veriﬁcation25
- Equipment Required25
- Table 3: Required Test Equipment25
- Making DC Current Loops26
- Front-Panel Display27
- Figure 1: Check LED Functionality27
- DC Gain Accuracy28
- Figure 2: Equipment Setup for DC Gain Accuracy Test28
- Table 4: Equipment Settings29
- Table 5: DC Gain Accuracy Test for the TCPA300 and TCPA40029
- Bandwidth31
- Figure 3: Bandwidth Test Setup31
- Table 6: Equipment Settings for Bandwidth Check31
- Table 7: TCPA300 Bandwidth Measurements34
- Table 8: TCPA400 Bandwidth Measurements34
- AC Coupling35
- Figure 4: AC Coupling Test Setup35
- Degauss36
- Figure 5: Setup for Degaussing the Current Probe36
- Table 9: TCPA300 and TCPA400 AC Coupling Measurements36
- Current Overload Test (TCPA300 Only)37
- Figure 6: Overload Test Setup37
- Table 10: Maximum Current Ratings for TCPA300-Compatible Probes38
- TCPA300 Ampliﬁer Test Record39
- TCPA400 Test Record40
TCP305 and TCP312 Performance Veriﬁcation41
- Required Test Equipment42
- Table 11: Required Test Equipment42
- DC Gain Accuracy43
- Figure 7: DC Gain Accuracy Test Setup for TCP305 and TCP31243
- Table 12: Equipment Settings for DC Gain Accuracy44
- Table 13: DC Gain Accuracy Test for the TCP305 and TCP31245
- Rise Time46
- Figure 8: Rise Time Test Setup for the TCP305 and TCP31246
- Table 14: Equipment Settings for Rise Time47
- Bandwidth48
- Figure 9: Bandwidth Test Setup for TCP305 and TCP31248
- Table 15: Equipment Settings for Bandwidth49
- Table 16: Bandwidth Test for the TCP305 and TCP31250
- TCP305 Current Probe Test Record51
- TCP312 Current Probe Test Record52
TCP303 and TCP404XL Performance Veriﬁcation53
- Equipment Required54
- Table 17: Required Test Equipment54
- DC Gain Accuracy55
- Figure 10: DC Gain Accuracy Test Setup for the TCP303 and TCP404XL55
- Table 18: Equipment Settings for DC Gain Accuracy55
- Table 19: DC Gain Accuracy Test Worksheet for the TCP303 and TCP404XL57
- Rise Time58
- Figure 11: Rise Time Test Setup for the TCP303 and TCP404XL58
- Table 20: Equipment Settings for Rise Time59
- Bandwidth (TCP303)61
- Figure 12: Bandwidth Test Setup for TCP30361
- Table 21: Equipment Settings for Bandwidth62
- Bandwidth (TCP404XL)63
- Table 22: Bandwidth Test for the TCP30363
- TCP303 Current Probe Test Record64
- TCP404XL Current Probe Test Record65
Adjustment Procedures Overview67
Table 23: Ampliﬁer and Probe Adjustments67
TCPA300 and TCPA400 Ampliﬁer Adjustments68
- Required Test Equipment68
- Accessing the Adjustments68
- Table 24: Required Test Equipment68
- TCPA300 Ampliﬁer69
- Figure 13: Ampliﬁer Adjustments69
- Table 25: TCPA300 Gain Adjustments69
- TCPA400 Ampliﬁer70
- Figure 14: Gain Adjustment Locations70
- Table 26: TCPA400 Gain Adjustments70
TCP305 and TCP312 Adjustments71
- Required Test Equipment71
- Accessing the Adjustments71
- Figure 15: TCP305 and TCP312 DC Gain Adjustment Location71
- Table 27: Required Test Equipment71
- TCP305 and TCP312 DC Gain Adjustment72
- Table 28: Settings for DC Gain Adjustment72
- Figure 16: DC Gain Adjustment Setup for TCP305 and TCP31273
- Table 29: DC Gain Accuracy Adjustments for the TCP305 and TCP31273
TCP303 and TCP404XL Adjustments74
- Required Test Equipment74
- Table 30: Required Test Equipment74
- Adjustment Locations75
- TCP303 and TCP404XL Transient Response and Coarse Gain Adjustment75
- Figure 17: TCP303 and TCP404XL Adjustment Locations75
- Figure 18: TCP303 and TCP404XL Transient Response and Coarse Gain Adjustment Setup76
- Table 31: Settings for Transient Response and Preliminary Gain Adjustments77
- DC Gain Adjustment80
- Figure 19: DC Gain Accuracy Adjustment Setup80
- Table 32: Equipment Settings for DC Gain Accuracy81
- Table 33: DC Gain Accuracy Adjustments for the TCP303 and TCP404XL81
Maintenance83
- Service Strategy83
- Preventive Maintenance83
Disassembly84
- Ampliﬁers84
- Equipment Required84
- Table 34: Equipment Required84
- Removing the Outer Case and Internal Covers85
- Figure 20: Removing the Case from the Ampliﬁer85
- Figure 21: Removing the Right-Side Inner Panel86
- Figure 22: Removing the Left-Side Inner Panel87
- Replacing the Front Panel Assembly88
- Figure 23: Disconnecting the Front-Panel Assembly88
- Replacing the Ampliﬁer Board89
- Figure 24: Removing the Three Heat Sink Clips89
- Figure 25: Removing the Ampliﬁer Board90
- Replacing the Power Supply91
- Figure 26: Replacing the Power Supply91
- Replacing the Fan92
- Figure 27: Removing the AC Power Connector92
- Figure 28: Removing the Fan93
- Probes94
- Equipment Required94
- Table 35: Equipment Required94
- TCP305 and TCP31295
- Figure 29: Removing the Strain Relief Boot95
- Figure 30: Removing the Top Half of the Probe96
- Figure 31: Removing the Probe Slide96
- Figure 32: Removing the Current Transformer97
- Figure 33: Removing the Circuit Board and Cable Assembly98
- TCP303 and TCP404XL99
- Figure 34: Removing the Handle99
- Figure 35: Removing the Current Transformer100
- Figure 36: Removing the Circuit Board and Cable101
Isolating Hardware Faults102
- Table 36: Ampliﬁer Hardware Faults102
- Table 37: Probe Hardware Faults102
- Determining the Ampliﬁer Firmware Version Number103
- Figure 37: Displaying the Ampliﬁer Firmware Version Number103
Replaceable Parts105
- Parts Ordering Information105
- Using the Replaceable Parts List105
Ampliﬁer Replaceable Parts106
Figure 38: TCPA300 and TCPA400 Replaceable Parts106
Table 38: TCPA300 and TCPA400 Replaceable Parts List107
Table 39: Power Cord Identiﬁcation108
Figure 39: TCPA300 and TCPA400 Standard Accessories109
Figure 40: TCPA300 and TCPA400 Optional Accessories110
Current Probes Replaceable Parts111
Table 42: TCP305 and TCP312 Replaceable Parts List112
Figure 42: TCP303 Replaceable Parts113
Table 43: TCP303 Replaceable Parts List114
Figure 43: TCP404XL Replaceable Parts115
Table 44: TCP404XL Replaceable Parts List116

Brand	Tektronix
Model	TCP312
Category	Measuring Instruments
Language	English

Tektronix TCP312 Service Manual

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