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diff --git a/DOCS/vt102-ug/chapter9.html b/DOCS/vt102-ug/chapter9.html new file mode 100644 index 0000000..b983c4f --- /dev/null +++ b/DOCS/vt102-ug/chapter9.html @@ -0,0 +1,329 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> +<HTML> +<HEAD> +<TITLE>VT100.net: Digital VT102 User Guide</TITLE> +<LINK HREF="vt102-ug.css" TYPE="text/css" REL="stylesheet"> +</HEAD> +<BODY> +<DIV CLASS="navbar"><A HREF="http://vt100.net/"><IMG CLASS="button" SRC="vt100.net-logo.png" ALT="VT100.net" HEIGHT="16" WIDTH="102"></A> VT102 User Guide<TABLE WIDTH="100%"> +<COL SPAN="3" WIDTH="33%"> +<TBODY> +<TR> +<TD ALIGN="LEFT"><A HREF="chapter8.html">Chapter 8</A></TD> +<TD ALIGN="CENTER"><A HREF="contents.html">Contents</A></TD> +<TD ALIGN="RIGHT"><A HREF="chapter10.html">Chapter 10</A></TD> +</TR> +</TBODY> +</TABLE> +<HR></DIV> +<H1 ID="S9"><SPAN CLASS="chapnum">9</SPAN> Maintenance and Troubleshooting</H1> +<H2 ID="S9.1">General</H2> +<P>This chapter describes maintenance procedures, troubleshooting (what to +do in the event of a problem), and self-tests used with the VT102. You +should troubleshoot the terminal before requesting service.</P> +<H2 ID="S9.2">Maintenance</H2> +<P>The terminal does not need preventive maintenance. However, you can +clean terminal and screen surfaces with any mild detergent that does not +use solvents; apply the detergent with a cloth or tissue. To clean the +keys, rub with a dry or moist cloth.</P> +<P CLASS="note">CAUTION: Do not use too much detergent when cleaning the terminal. +Liquids can damage the inside of the terminal. Do not remove the keycaps +when cleaning; you can damage the keyswitch contacts by replacing +the keycaps incorrectly.</P> +<H2 ID="S9.3">Troubleshooting</H2> +<P>If you suspect a problem with the terminal, check <A HREF="table9-1.html">Table 9-1</A> to see if the +symptoms are there. If the problem is not listed in <A HREF="table9-1.html">Table 9-1</A>, use the following +procedure:</P> +<OL> +<LI>Turn the power switch off (0) (<A HREF="figure9-1.html">Figure 9-1</A>).</LI> +<LI>Check the following items. +<P><EM>Voltage selection switch and fuse.</EM> Make sure the switch is in the +correct position. Select 120 volts by performing the following procedure.</P> +<OL> +<LI>Set the voltage selection switch to 115 (operating voltage range +99 to 128 Vac). On some terminals, the setting is 100 (operating range 87-107 Vac).</LI> +<LI>Remove the fuse holder cap by pressing in and turning counter-clockwise. +Check for a 1.25 A fuse (DIGITAL PN 90-0020-01) and +make sure the wire in the fuse is not broken.</LI> +</OL> +<P>Select 220-240 volts by performing the following procedure.</P> +<OL> +<LI>Set the voltage selection switch to 230 (operating voltage range 198 to 256 Vac). On some terminals, the setting is 250 (operating range 222-268 Vac).</LI> +<LI>Remove the fuse holder cap by pressing in and turning counter-clockwise. +Check for a 0.75 A slow blow fuse (DIGITAL PN 12-11237-00) +and make sure the wire in the fuse is not broken.</LI> +</OL> +<P><EM>Power cord.</EM> Make sure the cord is connected securely at both the +terminal and the wall outlet. Check ac power at the wall outlet with +another device such as a lamp.</P> +<P><EM>Keyboard coiled cord.</EM> Make sure the cord is securely plugged into +the keyboard connector at the back of the terminal.</P></LI> +<LI>Perform all the tests in the following section.</LI> +</OL> +<H2 ID="S9.4">Self-Tests</H2> +<P>The terminal uses self-tests to verify operation. The self-tests provided +are a power-up self-test, three loopback self-tests, and a printer test. The +power-up self-test runs each time the terminal is powered up. The loopback +self-tests may run after the power-up self-test ends; these self-tests +need an optional loopback test connector. The printer test ensures that +the terminal and printer can communicate.</P> +<H3 ID="S9.4.1">Power-Up Self Test</H3> +<P>A power-up self-test runs each time you turn the power on (power up). +The test checks general terminal operation, user memory (holding SET-UP +features), and the keyboard. Perform the power-up self-test by using +the following procedure.</P> +<OL> +<LI>Start the power-up self-test in one of the following ways. +<UL> +<LI>Turn the power switch to on (1) (<A HREF="figure9-1.html">Figure 9-1</A>).</LI> +<LI>If power is on, press <SPAN CLASS="keyname">SET-UP</SPAN> and then <SPAN CLASS="keyname">RESET</SPAN>.</LI> +<LI>If power is on, type one of the following sequences. The terminal +must be off-line with the ANSI/VT52 SET-UP feature set to ANSI +(SET-UP B switch 2-3 = 1). +<TABLE> +<COL STYLE="width:10em"> +<COL> +<TBODY> +<TR VALIGN="TOP"> +<TD><CODE>ESC [ 2 ; 1 y</CODE></TD> +<TD>Performs the self-test once.</TD> +</TR> +<TR VALIGN="TOP"> +<TD><CODE>ESC [ 2 ; 9 y</CODE></TD> +<TD>Performs the self-test continuously.</TD> +</TR> +</TBODY> +</TABLE></LI> +</UL> +<P>The single test ends with the following indications.</P> +<UL> +<LI>The terminal displays test data, the wait message, then erases +the screen. (The test data and wait message are not visible if the +terminal is not warmed up).</LI> +<LI>All keyboard indicators turn on and off, and either the ON LINE or +OFF LINE stay on. +<P CLASS="note">NOTE: The on or off state of other keyboard indicators depends +on received modem signals and feature selections.</P></LI> +<LI>A bell tone sounds.</LI> +<LI>The cursor appears in the upper-left corner of the screen.</LI> +</UL> +<P>The continuous test also displays test data, the wait message, then +erases screen. This test ends only if it finds an error or power is +turned off.</P> +<P>When the power-up self-test finds an error, the terminal provides one +of the following indications.</P> +<UL> +<LI>Does not perform the above sequence.</LI> +<LI>Displays character at the cursor position.</LI> +<LI>Sounds several bell tones.</LI> +</UL> +<P>There are two failures that allow the terminal operation to continue: a +user memory failure indicated by a 2 on the screen and several bell +tones, and a keyboard failure indicated by a 4 on the screen. The +user memory failure allows continued operation after you select SET-UP +features in operating memory. The keyboard failure allows the +terminal to continue to operate as a receive-only terminal.</P></LI> +<LI>After a single test, enter SET-UP to verify a successful test. A SET-UP +A display should appear on the screen. If not, call your local +DIGITAL Field Service Office.</LI> +</OL> +<H3 ID="S9.4.2">Data Loopback Self-Test</H3> +<P>The data loopback self-test verifies that the terminal can transmit and receive +characters. You must connect the transmit and receive lines to +each other with the EIA loopback connector (DIGITAL PN 12-15336) available +from the DIGITAL Accessories and Supplies Group (<A HREF="chapter10.html">Chapter 10</A>). The +terminal transmits characters on the transmit line and receives the characters +on the receive line. Perform the data loopback self-test by using +the following procedure.</P> +<P CLASS="note">NOTE: See <A HREF="chapter8.html">Chapter 8</A> to perform the data loopback self-test with the +20 mA current loop option (VT1XX-CA) installed.</P> +<OL> +<LI>Turn the power switch off (0).</LI> +<LI>Unplug the communication cable and install the EIA loopback connector +on the modem connector (<A HREF="figure9-2.html">Figure 9-2</A>).</LI> +<LI>The internal communication switch S6 must be on (closed) to perform +this test. If the switch is off (open), remove the access cover, +turn the switch on (closed), and install the access cover. See <A HREF="chapter7.html#S7.5.1">Internal +Communication Switch Selection</A> in <A HREF="chapter7.html">Chapter 7</A> for details. +<P CLASS="note">NOTE: Usually, this switch is only open when you set the modem +control SET-UP feature for asymmetric full-duplex (FDX C).</P></LI> +<LI>Turn the power switch on (1). The terminal performs the power-up +self-test.</LI> +<LI>Type one of the following sequences to perform the data loopback +self-test. The terminal must be off-line with the ANSI/VT52 SET-UP +feature set to ANSI (SET-UP B switch 2-3 = 1). +<TABLE> +<COL STYLE="width:10em"> +<COL> +<TBODY> +<TR VALIGN="TOP"> +<TD><CODE>ESC [ 2 ; 2 y</CODE></TD> +<TD>Performs the self-test once.</TD> +</TR> +<TR VALIGN="TOP"> +<TD><CODE>ESC [ 2 ; 10 y</CODE></TD> +<TD>Performs the self-test continuously.</TD> +</TR> +</TBODY> +</TABLE> +<P>The single test displays the wait message while running. The single +test ends with the following indications.</P> +<UL> +<LI>The wait message is erased.</LI> +<LI>ON LINE turns on. +<P CLASS="note">NOTE: The on or off state of other keyboard indicators depends +on received modem signals and feature selections.</P></LI> +<LI>The cursor appears in the upper-left corner of the screen.</LI> +</UL> +<P>The continuous test displays the wait message while running. The +test ends only if it finds an error or power is turned off.</P> +<P>When the test finds an error, the terminal displays an error character. +Call your local DIGITAL Field Service office for assistance.</P></LI> +<LI>If the test runs successfully, turn the power switch off and remove +the loopback connector. If you set switch S6 to run this test, change +the switch to its original position.</LI> +<LI>Connect the communication cable.</LI> +</OL> +<H3 ID="S9.4.3">EIA Loopback Self-Test</H3> +<P>The EIA loopback self-test verifies that the terminal can operate its +modem control lines. Perform the EIA loopback self-test by using the following +procedure.</P> +<OL> +<LI>Turn the power switch off (0).</LI> +<LI>Unplug the communication cable and install the EIA loopback connector +on the modem connector (<A TITLE="EIA Loopback Connector (Modem)" HREF="figure9-2.html">Figure 9-2</A>). The EIA loopback connecotr +(DIGITAL PN 12-15336) is available from the DIGITAL A&SG +(<A HREF="chapter10.html">Chapter 10</A>).</LI> +<LI>The internal communication switches S1, S2, S4, S6, S8, and S9 must +be on (closed) to perform this test. If any of these switches are off +(open), remove the access cover, turn the switches on (closed), and +install the access cover. See <A HREF="#S7.5.1">Internal Communication Switch Selection</A> +in <A HREF="chapter7.html">Chapter 7</A> for details.</LI> +<LI>Turn the power switch on (1). The terminal performs the power-up +self-test.</LI> +<LI>Type one of the following sequences to perform the EIA loopback +self-test. The terminal must be off-line with the ANSI/VT52 SET-UP +feature set to ANSI (SET-UP B switch 2-3 = 1). +<TABLE> +<COL STYLE="width:10em"> +<COL> +<TBODY> +<TR VALIGN="TOP"> +<TD><CODE>ESC [ 2 ; 4 y</CODE></TD> +<TD>Performs the self-test once.</TD> +</TR> +<TR VALIGN="TOP"> +<TD><CODE>ESC [ 2 ; 12 y</CODE></TD> +<TD>Performs the self-test continuously.</TD> +</TR> +</TBODY> +</TABLE> +<P>The single test displays the wait message while running. The test +ends with the following indications.</P> +<UL> +<LI>The wait message is erased.</LI> +<LI>OFF LINE and DSR turns on. +<P CLASS="note">NOTE: The on or off state of other keyboard indicators, depends +on modem signals received and feature selections.</P></LI> +<LI>The cursor appears in the upper-left corner of the screen.</LI> +</UL> +<P>The continuous test displays the wait message while running. The +test ends only if it finds an error or power is turned off.</P> +<P>When the test finds an error, the terminal displays an error character. +Call your DIGITAL Field Service office for assistance.</P></LI> +<LI>If the test runs successfully, turn the power switch off and remove +the loopback connector. If you set switches S1, S2, S4, S6, S8 or S9 +to run the test, change the switches to their original position.</LI> +<LI>Connect the communication cable.</LI> +</OL> +<H3 ID="S9.4.4">Printer Loopback Self-Test</H3> +<P>The printer loopback self-test verifies that the terminal's printer interface +can transmit and receive characters. In this test, you connect the transmit +and receive lines with the EIA loopback connector. The terminal transmits +characters on the transmit line and receives the characters on the receive +line. Perform the printer loopback self-test by using the following +procedure.</P> +<OL> +<LI>Turn the power switch off (0).</LI> +<LI>Unplug the printer cable and install the EIA loopback connector on +the printer interface connector (<A HREF="figure9-3.html">Figure 9-3</A>). The EIA loopback connector +(DIGITAL PN 12-15336) is available from A&SG.</LI> +<LI>Turn the power switch on (1). The terminal performs the power-up +self-test.</LI> +<LI>Type one of the following sequences to perform the printer loopback +self-test. The terminal is off-line with the ANSI/VT52 SET-UP B feature +set to ANSI (SET-UP B switch 2-3 = 1). +<TABLE> +<COL STYLE="width:10em"> +<COL> +<TBODY> +<TR VALIGN="TOP"> +<TD><CODE>ESC [ 2 ; 16 y</CODE></TD> +<TD>Performs the self-test once.</TD> +</TR> +<TR VALIGN="TOP"> +<TD><CODE>ESC [ 2 ; 24 y</CODE></TD> +<TD>Performs the self-test continuously.</TD> +</TR> +</TBODY> +</TABLE> +<P>The single test displays the wait message while running. The test +provides the following indications.</P> +<UL> +<LI>The wait is erased.</LI> +<LI>OFF LINE and KBD LOCKED turns on. KBD LOCKED turns off when +the test ends. +<P CLASS="note">NOTE: The on or off state of other keyboard indicators depends +on modem signals received and feature selections.</P></LI> +<LI>The cursor appears in the upper-left corner of the screen.</LI> +</UL> +<P>The continuous test displays the wait message while running. The +test ends only if it finds an error or power is turned off.</P> +<P>When the test finds an error, the terminal displays an error character. +This indicates a printer interface failure. Call your local DIGITAL +Field Service office for assistance.</P></LI> +<LI>Turn the power switch off (0) and remove the loopback connector.</LI> +<LI>Connect the printer cable.</LI> +</OL> +<H3 ID="S9.4.5">Printer Test</H3> +<P>The printer test verifies that the terminal and printer can communicate. +This test generates sample data for printing and transmits that data to the +printer. Perform the printer test by using the following procedure.</P> +<OL> +<LI>Connect the printer cable to the printer and the terminal's printer +connector. Turn both the terminal and printer on.</LI> +<LI>Make sure the following terminal and printer features match. +<UL> +<LI>Printer transmit/receive speed (baud rate)</LI> +<LI>Printer data/parity bits (data bits per character and parity)</LI> +</UL></LI> +<LI>Type the following sequence on the keyboard. The terminal must be +off-line with the ANSI/VT52 SET-UP feature set to ANSI (SET-UP B +switch 2-3 = 1). +<TABLE> +<COL STYLE="width:10em"> +<COL> +<TBODY> +<TR VALIGN="TOP"> +<TD><CODE>ESC # 8</CODE></TD> +<TD>The screen fills with E's.</TD> +</TR> +</TBODY> +</TABLE></LI> +<LI>Hold down <SPAN CLASS="keyname">SHIFT</SPAN> and press <SPAN CLASS="keyname">(PRINT)</SPAN>; the E's should print. If the E's +do not print, call your local DIGITAL Field Service Office.</LI> +</OL> +<DIV CLASS="navbar"><HR> +<TABLE WIDTH="100%"> +<COL SPAN="3" WIDTH="33%"> +<TBODY> +<TR> +<TD ALIGN="LEFT"><A HREF="chapter8.html">Chapter 8</A></TD> +<TD ALIGN="CENTER"><A HREF="contents.html">Contents</A></TD> +<TD ALIGN="RIGHT"><A HREF="chapter10.html">Chapter 10</A></TD> +</TR> +</TBODY> +</TABLE> +<DIV CLASS="navbot">http://vt100.net/docs/vt102-ug/chapter9.html</DIV></DIV> +</BODY> +</HTML> |