TV Repair: Common Faults and Solutions.
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Results: 87413
Results: 87413
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SONY | TPSL2 | Defective motor | Unit runs slow. | ||
| SONY | TCM121 | Mechanical modification | When customer presses record button with no tape inserted,pressure of record lever assy. against chassis causes the lever retainingportion to break off. since the retainer is part of the chassis assembly,the entire assy would have to be replaced. | ||
| SONY | TCK55II | Defective remote chip | Unit functions jammed in rewind mode voltages on pin 33 was0.37 volts. rewind mode voltage should read 10 volts. voltages ofremote chip pins 9, 5, 11 and 7 were 1.9v also should be 10 volts.remote chip affected total operation of tape deck. | ||
| SONY | TC755 | Cleaning stop microswitch | Low playback level off tape, power supply position ok. recordsection checked ok, found playback amp was being muted by q304 and q404.base measure 1.6v all the time. lifted r437, playback level normal.traced 1.6v back into system control ckt., to emitter of q | ||
| SONY | TAF3A | Pcb labelling incorrect | Q103/104/153/154 - 3 and 4 reversed on pcb labelling. -hq comments: thank you for this information. | ||
| SONY | PT79R | Part number error | I had ordered a power transformer, p/n 1-446-639-00, for usamodel which i copied the number directly out from the service manual. thetransformer that was sent to me was coded with the same number as was themanual but instead it was of 220 volts. later | ||
| SONY | STRV25 | Error in manual | Page 7 procedure 2, error adjust rt101 for 76 khz +/- 100 hz.this is opposite str-v2/-v3/-v4. | ||
| SONY | STRV25 | Modification on mounting flame proof resistors | Q652 failed causing flame proof resistors r633, 664, 665 tooverheat and open. this type resistor gets very hot before opening sincethese are mounted tight against the board. damage will occur when theyget hot. | ||
| SONY | STRV5 | Defective ic451 | No output, meter and lights operating, relay activates. b+and b- low. | ||
| SONY | STRV3 | Error in service manual | The schematic (page 20) shows bias test points incorrectly atcollector of q713 and q763. should be at emitters. -hq comments: see technical newsletter #8102. | ||
| SONY | STRV2 | Error in service manual | Vco adjustment page 9, procedure 2, adjust rt201 for 19khz+/- 100hz error. | ||
| SONY | ICFC310W | Modification for buzzer level | Alarm level very low. | ||
| SONY | ICFC11W | Clean and adjust switch | Alarm set time shows upon auto buzzer. | ||
| SONY | ICF7600 | Loose dial indicator | Dial indicator needle disconnects from the dial string. theunit will continue to tune radio stations but customer is unable to determine the station from the indicator. | ||
| SONY | CFS71 | Lubrication in switch assy needed | When the fast fwd/rewind switch is activated by the switchlever assy, binding of the two nylon pieces can occur. this causes themuting switch to stay in the on position. the audio is then greatlyreduced. this condition occurs most often when the ams f | ||
| SONY | CFM23 | Defective motor | Tape speed slowing - occasionally decrease in current tomotor. same decrease on external dc input. | ||
| SONY | TFM7720W | Broken connection on control | Volume control has no effect on volume - volume remains loud.removed volume control and it was working properly. | ||
| SONY | TFM7720W | Cold solder | No am on low end. | ||
| SONY | TFM6160W | Loose pulley | The tuning dial does not work. the pulley near the speakerpulls loose causing the dial string not to work. | ||
| SONY | TCS300 | Idler out of position | Spindle assy take-up reel will not turn in playback or recordonly. |