Job Number

0011-10

Equipment type

Television

Maker + Model #

Grundig CUC-2410 (T66)

Made in

Germany

Comments

No remote was given (non operational).

TV was already serviced twice.

BAD

1

Dead TV - No Raster and Sound

2

No LED (1 of the digits is very dim)

3

No remote control function

GOOD

1

Full repair description and observations

1

First, the power supply was inspected and found to be normal. The voltages after the chopper

2

A protection relay switch was triggered due to a fault in the circuit. This made it impossible to inspect the TV circuit since it was turned off.

3

The relay switch was bypassed and an arch in the focus anode at the CRT plate was noted. On inspecting the trippler it was found to be cracked.

4

The Trippler was replaced, and protection relay was not triggered, resulting in a good line output. However there was still no Sound and Raster

5

A digital to analogue converter IC (TDA 8442) was replaced but did not solved the problem.

6

The Microprocessor was then replaced (SDA 2011 A005) and finally the Sound and Raster were obtained.

7

Then it was noted that the remote control was not functioning and the fault was in the IR receiving circuit of the TV, since a new remote control was used. This fault is still not fixed since the TV is not being used.

Repair summary

TRIPPLER FAULTY (ARCHING) - CAUSED DAMAGE TO MICROPROCESSOR

Precautions, fouls and advises

1

N/a