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Chapter 2 – Service and Troubleshooting
Overview
Due to the reduced number of circuit boards and the requirement that
repairs be performed at board level, troubleshooting the WAX3 chassis
consists of observations of symptoms and customer information more
than actual signal tracing and voltage checks. This chapter will assist
in this process by providing illustrations of the circuit board locations,
troubleshooting flowcharts and various tips on determining what failure
may be causing the symptom.
Circuit Board Locations
The location of the major circuit boards is illustrated in Figures 2-1 through
2-4. They are as follows:
Figure 2-1; KDL26/32S3000 and KDL32S30L1
Figure 2-2: KDL32XBR4
Figure 2-3: KDL40S3000 and KDL40S30L1
Figure 2-4: KDL46S3000
Figure 2-5: KDL40D3000
Note the left and right support brackets that are visible when the rear
cover is removed. These may be removed at any time during service in
order to remove circuit boards more easily. If both brackets are removed
(necessary if LCD panel is replaced) attention must be paid as to which
side of the units the brackets came from. Each bracket is marked “L” and
“R”. These left and right markings are set when viewing the FRONT of
the television, not the rear. Locater pins are also located at the tops of
the brackets and are not in the same offset location. If the brackets are
installed incorrectly they will not sit flush and cause problems when trying
to install the screws for a wall mount bracket. Proper bracket installation
is shown in Figure 2-6.
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