Service manual

Wells-Garnder Color Vector Monitor Guide
Page 41 of 73
Table 3 - Display Versions
Version 1
Deflection PCB has two large, black, tubular capacitors, C804 and C805,
installed below top center of PCB.
Version 2
Input Protection Circuit PCB is installed (piggyback) WITH A 1K Ohm,
+/-5%, 1/4 W RESISTOR CONNECTED BETWEEN THE INPUT
PROTECTION CIRCUIT PCB AND THE DEFLECTION PCB.
Version 3
Input Protection Circuit PCB is installed (piggyback) BUT DOES NOT
HAVE A RESISTOR CONNECTED BETWEEN THE INPUT
PROTECTION CIRCUIT PCB AND THE DEFLECTION PCB.
Version 4
Deflection PCB DOES NOT HAVE CAPACITORS C804 AND C805
(BELOW TOP CENTER OF PCB) OR AN INPUT PROTECTION
CIRCUIT PCB INSTALLED.
21. Perform the procedure as follows for the appropriate version of the display determined
from Table 3. (Refer to the display manual, TM-183, for component and connector
locations).
NOTE: The 30K ohm, 1/4W resistor supplied in the kit is used only for Version 1 of the Wells-
Gardner display.
Version 1 Deflection Board
Perform the following procedure for Version 1 of the Wells-Gardner 6100 display.
1. Verify that the Preliminary Procedure has been performed. [see above]
2. Use a soldering iron to remove resistor R811 and replace it with the 30K ohm, 1/4W
resistor supplied in the kit.
3. Use a 1/4-inch hex driver to secure the modified Deflection PCB to the display chassis.
CAUTION! Make certain that the harness from Q705 and Q706 is connected to P700
and not P100.
4. Connect the harnesses to the appropriate Deflection PCB connectors.