Television Fault Cure Information - Service Remedies for Chassis MG3.1E/MG3.1A/MG3.1U/MG3.2E

Oct 12, 2026

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Technical fault-and-remedy notes for televisions across multiple chassis variants, centered on diagnosing power and picture-related failures. The content lists reference numbers and fault areas (power supply faults and picture faults), then details symptoms such as protection mode, missing colors, long start-up times, no picture, visible halo artifacts, and intermittent on/off behavior. For each case, it specifies inspection and component/software cures including checking and replacing defined positions on supply/CRT panels, adding or updating feature-box software, and changing transistors, diodes, and resistors to correct clamp errors and sync loss.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages8

Reading Time20 min

AccessFree to download

Fault Area A = Power supply faults

Symptom and cure for protection/no start

Fault Area C = Picture faults

Halo/artefacts around moving objects

Missing colors, switch-off spot, long start-up time

No picture / RGB amplifier remedies

Static white turning reddish/bluish at side areas

Greenish discolouration, flashing stripes from clamp error/sync loss

Intermittent switching on/off (function faults)

Television MG3.1E, MG3.1A, MG3.1U, MG3.2E Chassis: MG3.1E, MG3.1A, MG3.1U, MG3.2E Reference Number: HE-03/0017 Fault Area: A = Power supply faults Symptom: Set does not start up and/or goes into protection, errors 67 and 68 generated Cure: Check and replace if necessary position 2204 (680nF; 5322 121 51214) on the Top Supply. Remarks: Check the component by ticking on the component. In this case the value can change and the set will go into protection. This is an intermittent problem. Television EM5E, EM5A, EM5U, MG3.2E Chassis: EM5E, EM5A, EM5U, MG3.2E Reference Number: HE-03/0008 Fault Area: C = Picture faults Symptom: Visible artefacts (so called halos, see below) around moving objects in front of a non-moving background (e.g. a walking person in front of a building) . Cure: A special featurebox software has been developed to reduce this effect. It is located on position 7711 of the Small Signal Board (for EM5) or on position 7711 of the Feature Box (for MG3.2) . You can order this software under number 3104 317 44521. Remarks: This new FBX software is only meant as a 'Service' solution, and will not be implemented in production . It will significantly decrease the 'halo' effect (='watery' rim), but as it is a compromise, it will slightly increase the 'judder'effect ('jerky' movements) . Television EM5E, EM5A-P/M, EM5A-NTSC Chassis: EM5E, EM5A-P/M, EM5A-NTSC Reference Number: HE-02/0059 Fault Area: C = Picture faults Symptom: Several symptoms are possible: 1) One or more colours missing in the picture, or 2) Switch-off spot, or 3) Long start-up time (about 30 seconds) . Cure: Check transistors 7500, 7503, and 7506 ( BFS20, 5322 130 42718) on the CRT-panel and replace when defective. As a future flash protection, add three diodes ( BAW62, 9331 012 20133) to pins 7, 8, and 9 of connector 1940. Connect the three diode anodes together to the ground signal pin 10 of connector 1940. Remarks: 1) Due to a picture tube flash, transistors 7500, 7503, and 7506 on the CRT-panel can become defective. 2) Due to the defective transistors, the tube will discharge via a different path, resulting in a switch-off spot. 3) Due to the defective transistors, the loop between the HOP and the CRTis interrupted. This means that the loop can not stabilise. However, after about 30 seconds, the software will release the picture, even when the loop is not stabilised. This is valid for all sets before production week 0244. After this date, the problem was solved by a new layout including the extra diodes. Television EM5x Chassis: EM5x Reference Number: HE-03/0001 Fault Area: C = Picture faults Symptom: Several symptoms are possible: 1) One or more colours missing in the picture, or 2) Switch-off spot, or 3) Long start-up time (about 30 s), or 4) No picture. Cure: Check, and replace if necessary, the RGB amplifiers 7330/7340/7350 . You can order this component under number 9352 694 46112 (TDA6118JF) . To prevent the amplifiers from failing again, change R3338, R3339, and R3340 from 220 Ohm to 470 Ohm (ordering code is 3198 013 04710) . Note: Another possibility is that the RGB pre-amplifiers are defective. See Symptom Cure Information HE-02/0059 for this. Remarks: After production week 0250 the solution was introduced in production . Television EM2E Chassis: EM2E Restrictions: ONLY 25” and 28”-sets Reference Number: HE-02/0026 Fault Area: C = Picture faults Symptom: In a static picture with a lot of 'white' (e.g. TXT/OSD), the white becomes reddish and/or bluish at the side areas. Cure: Use software version 3104 317 03221 (or later) . With this software a new option is introduced called 'Txt sync L edge'. You will find this option in [SAM]-[Alignments]-[Options]-[Miscellaneous] . There are 2 possible executions: -For sets with the new 'txt/anti-jitter' circuit on the SSB (check for presence of TS7012 and TS7013), set above mentioned option

FAQs

What does Fault Area A cover in these TV service notes?

Fault Area A refers to power supply faults, including cases where the set does not start up or enters protection. The remedies focus on checking specific positions on the top supply and replacing parts if needed.

How is the “halo” picture problem addressed?

A special feature-box software is provided to reduce the halo effect around moving objects. The software is tied to a specific position on the Small Signal Board (EM5) or Feature Box (MG3.2) and can be ordered under a given number.

What causes missing colors or a switch-off spot, and how is it cured?

Missing colors, switch-off spot, and long start-up time can result from defective transistors on the CRT-panel. The notes instruct checking transistors by type, replacing when defective, and adding three diodes for future flash protection to a specified connector pinout.

Oct 12, 2026

Upload by Rizky