Jvc TV Repair: Common Faults and Solutions.

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Jvc Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
JVC	C14E1EK ONWA	Int snowy pic at sw on with no osd or r/c functs	Ok once tms73c47 micro reset (s/c pin 32 to chassis briefly). caused by crack in print at front edge of pcb on track to pin 2 micro - hard to see due to covered in black ink
JVC	C14E1EK ONWA	Dead - no st/by	Q902 2sb774 base emitter s.c. (used bc558).
JVC	C14E1EK ONWA	Dead - ht high	C909/911 47µ cured ht problem but still dead; no supply pin 42 an5601k dec/tb chip ic301. r323 6k8 5w fusible o/c
JVC	C14E1EK ONWA	Dead	After replacement of usual caps the mains smoother c907 4700pf 500v in psu pri was found to be leaky
JVC	C14E1EK -ONWA	St/by only - can be int	Lop stage 12v low at 11.5v - r434 0r68 hi res at 1r2
JVC	C14E1EK	Tuning drift	C116 sm cap - also check other sm electrolytics whilst tuner out
JVC	C14E1EK	Stuck in stby , relay clicks but no go . or very rarely comes on and then goes to stby after 3-4 mins .	R323 6k8 5w fusible oc.
JVC	C14E1EK	St/by only	C406 220µ 25v
JVC	C14E1EK	No txt	Saa5243p/e on txt pcb faulty
JVC	C14E1EK	Line tearing	Of course
JVC	C14E1EK	Int destruction of fop chip (ic401 la7830)	Replace vr901 (2k) +b preset.
JVC	C14E1EK	Incorrect agc	C124
JVC	C14E1EK	Frame collapse	Check r335 180k for o/c
JVC	C14E1EK	Field o/p chip ic401 la7830 int destroyed	Vr901 2k ht preset int - causing ht to int rise
JVC	C14E1EK	Field collapse after psu repair	Speaker plug connected to service pins by mistake
JVC	C14E1EK	Field collapse	25v supply to fop chip la7830 ic401 missing - r433 0r68 o/c & c424 4n7 500v leaky (measured ok out of cct)
JVC	C14E1EK	Faint horizontal line at bottom of screen	Replace r434 0.047Ω
JVC	C14E1EK	Dist sound	C143 10µ o/c in dc vol contr feed to pin 14 ic101
JVC	C14E1EK	Dead - st/by only	Zd402 s/c; replace the following:- zd402, r423, c909, zd902, c911, zd901, d408 to prevent ht rising & blowing parts again
JVC	C14E1EK	Dead	C907 small disc cap 0µ1? burnt & r901 4r7 5w o/c