itt Repair Tips




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MakeModel Ch.SymptomProblem SolutionSolutionBy:
ITTMonoprint B
Slow start up from cold.Change C701 , C722 ( 470u f 16v ) , C711 , C707 , R512
ITTMonoprint B
Slow start upC701 & C707
ITTMonoprint B
Sizzling noise followed by thump then Dead.Pin G of chopper Tx dry.
ITTMonoprint B
Pic pulling/flickering - OK on ScartC201 4µ7 in tuner hi esr
ITTMonoprint B
No soundC304 470µ (pin 5 TDA8196 IC301)
ITTMonoprint B
No control via front controlsKeypad defective - try cleaning
ITTMonoprint B
No cold startC722 470µ 16v (8v smoother)- NOTE wrong markings on pcb top
ITTMonoprint B
Int deadDry joints chopper tfmr
ITTMonoprint B
How switch mode PSU works.With ccts.
ITTMonoprint B
Dead - trippedLOPTx or s/c LOP stage
ITTMonoprint B
Dead - pri psu okD733 & C734
ITTMonoprint B
Dead - no 115v feed to line stage.C701 ( 4.7u f ) in PSU.
ITTMonoprint B
Dead - low HT & no EHTLOPTx - scope LOPTr coll - has lots of spikes
ITTMonoprint B
Dead - 115v at BU508D collector.Try LOPTX see Tv mag.
ITTMonoprint B
DeadD733, IC701, R715, R721, D702
ITTMonoprint B
DeadT501 BU508A LOP tr leaky, dry joint C518, C712 47µ 16v hi esr
ITTMonoprint B
DeadDry joints pin Q of chopper tfmr
ITTMonoprint B
deadHT at LOP Tr low at 25v; C701 4µ7 400v low cap (HT smoother)
ITTMonoprint B
Cuts out & int loses chan memory5v reg IC1405
ITTMonoprint B
Comes on with a screechC901 4µ7 400v & C707 2µ2 63v