TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KV1543R	No remote function, replaced ic001	Remote does not work, manual ok.
SONY	KV9300	No control of brightness	No control of brightness, excessive brightness even withscreens and drives down, voltages ok in abl drive circuits. also incolor.
SONY	KV8000	Incorrect brightness operation with retrace lines	Excessive brightness and retrace tube cathode voltages low,10v.
SONY	KV2643R	No sound or picture, replaced ic2002	No sound or picture. could not program any channels norwould the set change address positions.
SONY	KV2643R	Incorrect channel indication	The channel indicator neon lamps are polarized and will notlight when soldered in backwards. the lamps are not marked as to whichway they are to be soldered in.
SONY	KV2101	Poor v linearity, r517 increased in value	Poor vertical linearity top 1/3 of picture slightlycompressed. vertical size control to end of range. waveform at base ofq501, blanking pulse 5 msec, it should be 1.2 msec.
SONY	KV1714	Dead	Dead set, 1.6 amp fuse blown, horizontal out transistorshorted, b+ regulator shorted.
SONY	KV1543R	Intermittent shut down, replaced r532	The set would intermittently shut down.
SONY	KV1201	No color, resoldered r356	No color. checked cw signal at the collector of q307 whichwas not there. signal was present at the base. i checked the dcvoltage - collector was 18v, that told me that the transistor was notconducting. base voltage was normal (3v) emitter was 2.8v.
SONY	KP5000	Green picture, replaced c323	Severe bright green screen no control.
SONY	KP5000	Shut down, replaced c5112	Immediate shut down - no high voltage.
SONY	KP5000	Dead, bushing on vert output was carbonized	Unit cannot be turned on. when the power switch is activated,unit comes on for 2 seconds and goes off. checked and f6103 was foundopen. 120v line was loaded. when i checked resistance from 120v b+ toground, i read 150Ω both ways. ga-9 (plug) pin
SONY	FX310	No audio	No audio - any function. acts like bad function switchbecause if applied additional pressure on knob volume works - releaseknob - no audio.
SONY	TPSL2	Defective motor	Tape player would not run. motor seemed to draw excesscurrent. a check of the motor revealed the fg winding was shorted to themain winding.
SONY	TPSL2	Weak battery spring	Customer complaints of wow while tapping the unit (i found 4units with the same problem).
SONY	TCM280	Misprint in s/m	On page 23 of tcm-280/280b service manual a part numbermisprint exists. -hq comments: the correct part numbers for two diodes are as follows:dm-101 8-745-101-01dm-101a 8-745-101-11the dm-101 substitutes for the dm-101. thus, in this case, the part
SONY	TCK96R	Connection error in manual	The connection point shown for the white wire is incorrect.this should go to the other end of r719. the wiring diagram in themanual supplement #2 is not clear on where this wire connects. also, theblack jumper wire and r707 to the connecting point of t
SONY	TCK96R	Open d604	Unit will only go into fwd plays - all other modesnonfunctional.
SONY	TCK71	Alignment of tape path	Found back tension 3.5 gcm and tape path high at pinch rollerand low at head, causing tape wrinkle.
SONY	TCK61	Missing 2.5mm steel balls	The head deck assy will not move fully into the cassette. inthe case of the tc-k81, the assy jammed in the cassette case, chippingthe erase head.