SONY TV Repair: Common Faults and Solutions.

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SONY Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	ICF9650W	Crack in pcb	No sound, dial lamp lights, found no b+ to radio.
SONY	ICF9650W	Breaks in pcb	Circuit board broken at 3 out of 4 places where circuit boards mounted on front panel. no damage visible on main cabinet assy.,packing or box.
SONY	ICF9650W	Cold solder joint t404	Hum only, no am, no fm, b+ for radio was only 1.5v insteadof 7.5v.
SONY	ICF9650W	Break in pcb	Dial light works, no sound.
SONY	ICF9530W	Missing p/n	The volume control part number is missing from the s/m.
SONY	ICF7750W	L17 needed redressing	No weather band reception and dead carriers at intervalsacross high vhf band. only sound of 2 local tv stations came through.
SONY	ICF7750W	Leads become loose	No sound intermittently because the audio output transformerby its very weight had caused its secondary leads to become unsolderedfrom the board. if this transformer were held in place by tabs as aretransformers used in color tv's, this problem, i feel,
SONY	ICF7370W	Missing switch arm	Radio would not switch from fm to psb band.
SONY	ICF7280W	Cold solder joint on ct4	No am.
SONY	HST49	Leaky cap	Unit came in with no am and no fm. the amplifier and tapeportion works fine. checked b+ at pin 7 of ic101 and found 18.5v (nocurrent draw by ic). replaced ic101 (cx-168), still no am or fm.
SONY	HST49	Defective tuning cap	After 15 minutes of operation, am section stops operating.
SONY	HST49	Defective q901	Output ic (501, 601) failure. a hole was found in ic's afterthey failed.
SONY	HST49	Incorrect p/n	Service manual shows p/n 1-548-091-xx for tape counter, thiscounter will not mount in unit.
SONY	HST48	Defective ic ha1350s	Unit turns on but no sound from speaker a or b channel. ifnew speakers are plugged in they will blow because of 28 volts comingthrough defective ha1350s output ic. this also pertains to the hst-68 andhst-69.
SONY	HMK339	Missing part number	Part designated as spring plate on exploded view page 32 ofs/m has no part number. -hq comments: the part number is 3-554-215-00.
SONY	HMK339	Defective rubber on reel assembly	The take up reel does not take up the tape properly. tapeballs up between capstan and take up reel, and get damaged. this iscaused by lack of pressure between drive pulley and take up reel rubbersurface.
SONY	HME228	Wrong value cap installed	No separation in stereo. all voltages looked ok - factoryerror.
SONY	HP219A	Boards have changed	Manual lists the part number as k-006-048-10, part beingreceived is k-0660-481-0. -hq comments: the servo amplifier and dc motor set has been changed andthe former set is no longer available. the part number of the set(k-066-048-10) remains the same.
SONY	CFSD7	Lever needed bending	Solenoids would click but tape mechanism would not move.lever a would rise over cam gear a causing the mechanism not to bepushed down into gear.
SONY	CFSD7	Link lever binding	Cannot place tape deck in any mode. forward led on all the time.