Instructions

To remove modules
About this task
• To remove any of the instrument modules or assemblies, you must first remove the rear cover and separate the front chassis from the
rear chassis.
• To remove the Front Panel board assembly or the front panel case assembly, you must first remove the Main board assembly and the
front chassis.
• To remove or install the keypad, do not touch the switch contacts with your fingers. The oils on your fingers will degrade or damage the
switch contacts.
To help prevent damage to the keypad, use cotton gloves when removing or installing the keyboard pad.
Troubleshooting
CAUTION: Before performing this or any other procedure in this manual, read the General Safety Summary and Service Safety
Summary found at the beginning of this manual.
To prevent possible injury to service personnel or damage to electrical components, please read information on Preventing ESD.
(See Preventing ESD on page 16.)
This section contains information and procedures designed to help you isolate faults to a module.
This section requires that service personnel have the appropriate skills to work on this instrument, including PC troubleshooting and
Microsoft Windows operating system skills. Details of PC and Windows operation and service are not in this manual.
For assistance, contact your local Tektronix Service Center.
Adjustment after repair
Instrument adjustment is required after you replace the Main board (all models) or the Front End assembly (4 channel models). Refer to
the Adjustments section for information about the adjustment. (See Adjustments on page 15.)
Required tools and equipment
About this task
You need the following equipment to troubleshoot the instrument.
Tools and equipment Example
DMM 3.5 digits or above
Troubleshooting procedure
Use the following flowcharts to troubleshoot an instrument failure. Begin with the Primary troubleshooting flowchart.
Warning:
Before removing the cabinet, disconnect the power cord from the line voltage source. Failure to do so could cause
serious injury or death.
CAUTION: When you operate the four-channel instrument with the cabinet removed, the system fan will not cool the instrument.
You must provide an external fan to cool the interior of the instrument. Failure to do so could cause instrument damage.
Maintenance
TBS2000B Series Digital Storage Oscilloscopes Service Manual 19