RCA L37WD22, L37WD250, L42WD22, L42WD250, L46WD22 Repair tips

Television

Product Support • Mail Stop INH 905

P.O. Box 1976 • Indianapolis, IN 46206 -1976

TV 08-001

DATE: April 11, 2008 Warranty Labor Rate: Major

CHASSIS: P810

MODELS: L37WD22, L37WD250, L42WD22, L42WD250, L46WD22, L46WD250

TOPIC : PCB Main Board (Digital Board) Failure

Symptom: No analog channels, distorted or lost audio, digital channels still present.

Cause: Open Fuse, 1C33, on PCB Main Board

Cure: Install replacement fuse part #275819

If the customer complaint is “Distorted or no audio, no analog channels or analog inputs, but digital channels
are still present” inspect the PCB Main Board (Digital Board) for an open fuse. The fuse, 1C33, is located
approximately 2 inches behind the tuner (see Figure 1). The surface mounted part has various markings on
the original part from “105” to “F” (see Figure 2 close-up) and is located below the board marking “7C32”. An
open fuse, 1C33 in the +5VMPIF-MAIN supply, has been found to be the cause of the listed problems.
Replacement fuse #275819 can be placed directly over the top and soldered to the ends of the existing fuse
to lessen the chances of damaging the board traces.

Figure 1: PCB MAIN BOARD Figure 2: Fuse Location

Product Safety Information

Product Safety information is contained in the appropriate TTE Service Data covering models/chassis referenced herein. All specified
Product Safety requirements and testing shall be complied with prior to returning equipment to the customer. Servicers who defeat safety
features or fail to perform safety checks may be liable for any resulting damages and may expose themselves and others to possible injury.

First Edition - First Printing Prepared for TTE Technology, Inc.
Copyright 2008 Product Technical Services, INH905
Trademark(s)
RCA and the RCA logos are trademarks Indianapolis, IN 46206 U.S.A.
used under license to TTE Corporation

Printed in U.S.A TV08-001 Page 1 of 1

®

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