HP 53132A Assembly And Service Manual page 3

Assembly-Level Service
Guide
This guide describes how to service the HP 53131A and HP 53132A
Universal Counters, and the HP 53181A Frequency Counter.
The information in this guide applies to instruments having the number
prefix listed below, unless accompanied by a "Manual Updating Changes"
package indicating otherwise.
SERIAL PREFIX NUMBER:
HP 53131A/132A/181A 225 MHz
Counter
3711 AND ABOVE (HP 53131A)
3710 AND ABOVE (HP 53132A)
3711 AND ABOVE (HP 53181A)