From 4163308ecae26c76d22e4cc80d8bae729b06b94f Mon Sep 17 00:00:00 2001 From: james <> Date: Sun, 3 Feb 2008 16:20:24 +0000 Subject: *** empty log message *** --- DOCS/vt102-ug/chapter9.html | 329 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 329 insertions(+) create mode 100644 DOCS/vt102-ug/chapter9.html (limited to 'DOCS/vt102-ug/chapter9.html') 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 @@ + + +
+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.
+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.
+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.
+If you suspect a problem with the terminal, check Table 9-1 to see if the +symptoms are there. If the problem is not listed in Table 9-1, use the following +procedure:
+Voltage selection switch and fuse. Make sure the switch is in the +correct position. Select 120 volts by performing the following procedure.
+Select 220-240 volts by performing the following procedure.
+Power cord. 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.
+Keyboard coiled cord. Make sure the cord is securely plugged into +the keyboard connector at the back of the terminal.
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.
+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.
+ESC [ 2 ; 1 y |
+Performs the self-test once. | +
ESC [ 2 ; 9 y |
+Performs the self-test continuously. | +
The single test ends with the following indications.
+NOTE: The on or off state of other keyboard indicators depends +on received modem signals and feature selections.
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.
+When the power-up self-test finds an error, the terminal provides one +of the following indications.
+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.
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 (Chapter 10). 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.
+NOTE: See Chapter 8 to perform the data loopback self-test with the +20 mA current loop option (VT1XX-CA) installed.
+NOTE: Usually, this switch is only open when you set the modem +control SET-UP feature for asymmetric full-duplex (FDX C).
ESC [ 2 ; 2 y |
+Performs the self-test once. | +
ESC [ 2 ; 10 y |
+Performs the self-test continuously. | +
The single test displays the wait message while running. The single +test ends with the following indications.
+NOTE: The on or off state of other keyboard indicators depends +on received modem signals and feature selections.
The continuous test displays the wait message while running. The +test ends only if it finds an error or power is turned off.
+When the test finds an error, the terminal displays an error character. +Call your local DIGITAL Field Service office for assistance.
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.
+ESC [ 2 ; 4 y |
+Performs the self-test once. | +
ESC [ 2 ; 12 y |
+Performs the self-test continuously. | +
The single test displays the wait message while running. The test +ends with the following indications.
+NOTE: The on or off state of other keyboard indicators, depends +on modem signals received and feature selections.
The continuous test displays the wait message while running. The +test ends only if it finds an error or power is turned off.
+When the test finds an error, the terminal displays an error character. +Call your DIGITAL Field Service office for assistance.
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.
+ESC [ 2 ; 16 y |
+Performs the self-test once. | +
ESC [ 2 ; 24 y |
+Performs the self-test continuously. | +
The single test displays the wait message while running. The test +provides the following indications.
+NOTE: The on or off state of other keyboard indicators depends +on modem signals received and feature selections.
The continuous test displays the wait message while running. The +test ends only if it finds an error or power is turned off.
+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.
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.
+ESC # 8 |
+The screen fills with E's. | +