Tektronix 070-8462-03, Instruction Manual

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1735 HD High Definition Waveform Monitor
7–11
Corrective Maintenance
NOTE . No repair should be attempted during the warranty period.
CAUTION.
A 2% RMA flux content solder is recommended for making repairs in
this instrument. Cleaning of rosin residue is not recommended. Most cleaning
solvents tend to reactivate the rosin and spread it under components where it
may cause corrosion under humid conditions. The rosin residue, if left alone,
does not exhibit these corrosive properties.
Obtaining Replacement Parts
Replacement parts are available through the local Tektronix, Inc., field office or
representative. However, many common electronic parts are available through
local sources. Using a local source where possible will eliminate shipping
delays.
Changes to Tektronix instruments are sometimes made to accommodate
improved components, as they become available, and to improve circuit
performance. Therefore, it is important to include the following information
when ordering parts:
1. Part Number
2. Instrument Type or Number
3. Serial Number
4. Modification or Option Number (if applicable)
If a part has been replaced with a new or improved part, the new part will be
shipped (if it is a direct replacement). If not directly replaceable, the local
Tektronix field office or representative will contact the customer concerning any
changes. After any repair, circuit readjustment may be required.
Selected Components
The 1735 HD has only one test selectable part. Capacitor C255 on the A3 Main
board has a nominal value of 22 pF. If necessary to meet the CH 3A Subtract
specification, this capacitor may be changed to 15 pF.