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GRUNDIG Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
GRUNDIGT51-4201TOP CHASSIS 12.5
The image becomes increasingly white and lacks definition.Zener zd101 with leakage
GRUNDIGMW70-2101 CUC2059
Systematic destruction of the power supply transistor t6006 (k2699)Substituir r6001 (270 k)
GRUNDIGCUC5303
No sound, you can only hear a low pink noise coming from the speaker.Substituir t154 bc548
GRUNDIGCUC4400
Power supply does not generate voltages.Rataa - crimp
GRUNDIGCUC7303
Low sound, control doesn't workDefective infrared receiver ic
GRUNDIGT63-530
Excess red colorDiode d746, on the trc board, with leakage
GRUNDIGCUC5303
Sem osdTransistor bc548 - t833 open at the e/b junction
GRUNDIGCUC6300
Sound with momentary sound failures, sometimes the OSD appears blocking and it also happens that after a while it ends up with a white screen and no sound.After checking and/or replacing the switch, memory and cleaning the printed circuit lines without obtaining results, the fault was resolved with a general wash of the chassis.
GRUNDIGMW70-2700NIC/DOLBY CH.CUC2059
Doesn't startT60006(irf-pc50),ic60010(tda4605/3),r60001 270k
GRUNDIGCUC3400
The p+ key on the panel does not work, it does not go into stand-by.Change the on/off switch.
GRUNDIGCUC7851
Loading emergency data into IC850 EEPROM.After changing the eeprom => connect pin 1 of the ic850 to the chassis and turn on the TV using the switch. the ic850 eeprom is loaded with the default data.
GRUNDIGCUC7851
It works ok but when it turns off, if you try to turn it on again it won't start.Change the eeprom that is on the zf board. If you put the empty eeprom it starts ok but there is no sound - it is necessary to load the emergency values.
GRUNDIGCUC7303
Image with pulses in vertical synchronismD444 (low voltage)
GRUNDIGCUC6300
After a while the sound becomes noisy until it stops.Electrolytic capacitor c377.
GRUNDIGCUC5350
No sound, increasing the volume to maximum makes noiseI.c. msp2400
GRUNDIGCUC6300
Image with abnormal color type switched in NTSCTransistor t127
GRUNDIGCUC5365
Image with floating ripple horizontally and out of position.Transistor t522 (bc548)
GRUNDIGT51-440 / CUC4400
It does not turn on, or it only turns on after a few minutes and works until it is turned off again at the switch. If it is put on standby it works ok.C633 (100µf/25v) connected to pin 6 of the altered tda4605 - typical failure.
GRUNDIGCUC5303
There is no image. it is white with return lines. has sound.Tr833 on line u/data. (typical of failures of that line)
GRUNDIGCUC2103
No vertical linearity (image cut off at the bottom of the screen)Smd transistor bc847, position ct50015 shorted between emitter and collector.