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Repair tips

Make	Model	Problem	Solution	Date

Found: 10
Hitachi	C2574TN C2874TN	Shuts down with only NICAM leds lit	R952 68k, R953 82k, R954 8k2 in PSU	14-09-04
Hitachi	C2874TN	Dead with plopping sound at sw on	R901 82k 1/2w start up res o/c	14-09-04

Hitachi	C2874TN	Dead with popping sound from spkrs	R901 82k o/c	14-09-04
Hitachi	C2874TN	Field collapse - IC601 failed	Check dry joints Q601/2/3 & R610. Also E-W chip & 10R safety res not marked on cct connected between L752 & diodes D707/6	14-09-04
Hitachi	C2874TN	Field o/p chip IC601 LA7838 fails	Check dry joints Q601/2/3 & R610 etc. Check IC751 (e/w corr) in psu	14-09-04
Hitachi	C2874TN	Int dead - can come back on its own. Sometimes red/green or no LED	Dry joints on IC951, Q953, and Q956. Q953 was the worst, all connections to each leg were faulty.	14-09-04
Hitachi	C2874TN	Int E-W	R751 across C758 on comp side of pcb not soldered	14-09-04
Hitachi	C2874TN	Int width & E/W dist	Dry joint wire link J196 between C612 & R080 connected to plug E180 via Pin 8 (EW connection).	14-09-04
Hitachi	C2874TNX	Trips with red led blinking	Dry joint Q953 coll under plastic runner	14-09-04
Hitachi	C2874TNY	Reverts to st/by	Check IC4451 TDA7253M audio chip & R952 68k in HT preset network	14-09-04

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