GRUNDIG TV Repair: Common Faults and Solutions.

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GRUNDIG Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
GRUNDIG	CUC4635	No nicam sound - mono sound ok	Check wfrm at pins 3,4 & 33 of cf70123 ic2550. if ok at pins 3 & 4 but pin 33 is low dis pin 15 amu2484 chip. if signal appears at pin 33 then amu chip is u/s. if not both chips could be faulty - replacement board cheaper.
GRUNDIG	CUC4620	No sound or raster - loptx screams	Tda8410 line dr chip u/s
GRUNDIG	CUC4620	Field collapse - partial	D7001 s/c, r525 0r33 o/c
GRUNDIG	CUC4620	Field coll	R525 0.33r d7001 sc
GRUNDIG	CUC4620	Dead - tripler was arcing	Replaced k536 tripler; t541; ic500 tda8140; ic 2340 tda2579; c541 220mf/40v; d546 by228
GRUNDIG	CUC4511	Thin hum bar causing cogging	Tda8140 faulty or c527
GRUNDIG	CUC44XX	Station ident on all the time.	Its a dealer option - sw off by pressing tv then reveal.
GRUNDIG	CUC44R R	Frame cramp top & bottom with flyback lines at top	D421 ( 1n4935 ) leaky.
GRUNDIG	CUC44R R	Dead.	Dry joint on r516 by lopt.
GRUNDIG	CUC44R R	Dead.	C633 ( 100uf 40v ) s/c.
GRUNDIG	CUC4411	Col int	Replace sub carrier osc trimmer with a 15pfcap
GRUNDIG	CUC4410	No pic - sound ok - no line drive	Comes from ic526 tda8140 which was dry jointed & faulty
GRUNDIG	CUC4410	Excess width	D7102 zpd30 in e/w module s/c
GRUNDIG	CUC4410	Dead - bu508a loptr s/c	Tda8140 chip giving dist line pulses - chip was cause of problem
GRUNDIG	CUC4401	Dead o/p volts from psu low	C633 100µ 25v o/c
GRUNDIG	CUC4400	Severe picture distortion in if stage	Tda5931 us
GRUNDIG	CUC4400	Poor pic with ringing	Tda5931 ic2210 on if panel
GRUNDIG	CUC4400	No sound or picture, eht normal, screen is black.	Change t2213 and t2221 on if board. no leaks or any other defects were detected.
GRUNDIG	CUC4400	No sound or picture, eht normal, screen is black.	Change t2213 and t2221 on if board. no leaks or any other defects were detected.
GRUNDIG	CUC4400	Int refuses to go to st/by	Check mains sw wiper contacts