开云体育

On Tue, 10/10/17, knener@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

Subject: RE: [hp_agilent_equipment] HP AN/USM 281A Oscilliscope needs repair (San Antonio TX)
To: hp_agilent_equipment@...
Date: Tuesday, October 10, 2017, 10:23 PM


?









Again, this could be related to open resistors in
the horizontal deflection amplifier output stage.
Specifically I would check R238, R239, and R275. These are
the component references from the 8558B Operation and
Service Manual (not the military version). The most common
failure that I have encountered is R238 and/or R275 either
open, or waaaaay off from the correct value (12.1K
ohms).
Ken












#yiv0689356414 #yiv0689356414 --
#yiv0689356414ygrp-mkp {
border:1px solid #d8d8d8;font-family:Arial;margin:10px
0;padding:0 10px;}

#yiv0689356414 #yiv0689356414ygrp-mkp hr {
border:1px solid #d8d8d8;}

#yiv0689356414 #yiv0689356414ygrp-mkp #yiv0689356414hd {
color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px
0;}

#yiv0689356414 #yiv0689356414ygrp-mkp #yiv0689356414ads {
margin-bottom:10px;}

#yiv0689356414 #yiv0689356414ygrp-mkp .yiv0689356414ad {
padding:0 0;}

#yiv0689356414 #yiv0689356414ygrp-mkp .yiv0689356414ad p {
margin:0;}

#yiv0689356414 #yiv0689356414ygrp-mkp .yiv0689356414ad a {
color:#0000ff;text-decoration:none;}
#yiv0689356414 #yiv0689356414ygrp-sponsor
#yiv0689356414ygrp-lc {
font-family:Arial;}

#yiv0689356414 #yiv0689356414ygrp-sponsor
#yiv0689356414ygrp-lc #yiv0689356414hd {
margin:10px
0px;font-weight:700;font-size:78%;line-height:122%;}

#yiv0689356414 #yiv0689356414ygrp-sponsor
#yiv0689356414ygrp-lc .yiv0689356414ad {
margin-bottom:10px;padding:0 0;}

#yiv0689356414 #yiv0689356414actions {
font-family:Verdana;font-size:11px;padding:10px 0;}

#yiv0689356414 #yiv0689356414activity {
background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px;padding:10px;}

#yiv0689356414 #yiv0689356414activity span {
font-weight:700;}

#yiv0689356414 #yiv0689356414activity span:first-child {
text-transform:uppercase;}

#yiv0689356414 #yiv0689356414activity span a {
color:#5085b6;text-decoration:none;}

#yiv0689356414 #yiv0689356414activity span span {
color:#ff7900;}

#yiv0689356414 #yiv0689356414activity span
.yiv0689356414underline {
text-decoration:underline;}

#yiv0689356414 .yiv0689356414attach {
clear:both;display:table;font-family:Arial;font-size:12px;padding:10px
0;width:400px;}

#yiv0689356414 .yiv0689356414attach div a {
text-decoration:none;}

#yiv0689356414 .yiv0689356414attach img {
border:none;padding-right:5px;}

#yiv0689356414 .yiv0689356414attach label {
display:block;margin-bottom:5px;}

#yiv0689356414 .yiv0689356414attach label a {
text-decoration:none;}

#yiv0689356414 blockquote {
margin:0 0 0 4px;}

#yiv0689356414 .yiv0689356414bold {
font-family:Arial;font-size:13px;font-weight:700;}

#yiv0689356414 .yiv0689356414bold a {
text-decoration:none;}

#yiv0689356414 dd.yiv0689356414last p a {
font-family:Verdana;font-weight:700;}

#yiv0689356414 dd.yiv0689356414last p span {
margin-right:10px;font-family:Verdana;font-weight:700;}

#yiv0689356414 dd.yiv0689356414last p
span.yiv0689356414yshortcuts {
margin-right:0;}

#yiv0689356414 div.yiv0689356414attach-table div div a {
text-decoration:none;}

#yiv0689356414 div.yiv0689356414attach-table {
width:400px;}

#yiv0689356414 div.yiv0689356414file-title a, #yiv0689356414
div.yiv0689356414file-title a:active, #yiv0689356414
div.yiv0689356414file-title a:hover, #yiv0689356414
div.yiv0689356414file-title a:visited {
text-decoration:none;}

#yiv0689356414 div.yiv0689356414photo-title a,
#yiv0689356414 div.yiv0689356414photo-title a:active,
#yiv0689356414 div.yiv0689356414photo-title a:hover,
#yiv0689356414 div.yiv0689356414photo-title a:visited {
text-decoration:none;}

#yiv0689356414 div#yiv0689356414ygrp-mlmsg
#yiv0689356414ygrp-msg p a span.yiv0689356414yshortcuts {
font-family:Verdana;font-size:10px;font-weight:normal;}

#yiv0689356414 .yiv0689356414green {
color:#628c2a;}

#yiv0689356414 .yiv0689356414MsoNormal {
margin:0 0 0 0;}

#yiv0689356414 o {
font-size:0;}

#yiv0689356414 #yiv0689356414photos div {
float:left;width:72px;}

#yiv0689356414 #yiv0689356414photos div div {
border:1px solid
#666666;min-height:62px;overflow:hidden;width:62px;}

#yiv0689356414 #yiv0689356414photos div label {
color:#666666;font-size:10px;overflow:hidden;text-align:center;white-space:nowrap;width:64px;}

#yiv0689356414 #yiv0689356414reco-category {
font-size:77%;}

#yiv0689356414 #yiv0689356414reco-desc {
font-size:77%;}

#yiv0689356414 .yiv0689356414replbq {
margin:4px;}

#yiv0689356414 #yiv0689356414ygrp-actbar div a:first-child {
margin-right:2px;padding-right:5px;}

#yiv0689356414 #yiv0689356414ygrp-mlmsg {
font-size:13px;font-family:Arial, helvetica, clean,
sans-serif;}

#yiv0689356414 #yiv0689356414ygrp-mlmsg table {
font-size:inherit;font:100%;}

#yiv0689356414 #yiv0689356414ygrp-mlmsg select,
#yiv0689356414 input, #yiv0689356414 textarea {
font:99% Arial, Helvetica, clean, sans-serif;}

#yiv0689356414 #yiv0689356414ygrp-mlmsg pre, #yiv0689356414
code {
font:115% monospace;}

#yiv0689356414 #yiv0689356414ygrp-mlmsg * {
line-height:1.22em;}

#yiv0689356414 #yiv0689356414ygrp-mlmsg #yiv0689356414logo {
padding-bottom:10px;}


#yiv0689356414 #yiv0689356414ygrp-msg p a {
font-family:Verdana;}

#yiv0689356414 #yiv0689356414ygrp-msg
p#yiv0689356414attach-count span {
color:#1E66AE;font-weight:700;}

#yiv0689356414 #yiv0689356414ygrp-reco
#yiv0689356414reco-head {
color:#ff7900;font-weight:700;}

#yiv0689356414 #yiv0689356414ygrp-reco {
margin-bottom:20px;padding:0px;}

#yiv0689356414 #yiv0689356414ygrp-sponsor #yiv0689356414ov
li a {
font-size:130%;text-decoration:none;}

#yiv0689356414 #yiv0689356414ygrp-sponsor #yiv0689356414ov
li {
font-size:77%;list-style-type:square;padding:6px 0;}

#yiv0689356414 #yiv0689356414ygrp-sponsor #yiv0689356414ov
ul {
margin:0;padding:0 0 0 8px;}

#yiv0689356414 #yiv0689356414ygrp-text {
font-family:Georgia;}

#yiv0689356414 #yiv0689356414ygrp-text p {
margin:0 0 1em 0;}

#yiv0689356414 #yiv0689356414ygrp-text tt {
font-size:120%;}

#yiv0689356414 #yiv0689356414ygrp-vital ul li:last-child {
border-right:none !important;
}
#yiv0689356414