TV Repair: Common Faults and Solutions.
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Results: 87418
Results: 87418
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SONY | SLHFR30 | Playback picture distorted | When scoping rf envelope, one head missing. servicer hasalready changed the heads. traced rf (a and b) to pins 17 and 18. bothheads were present. check pg pulse at pin 9, it was okay. no output atpin 14 for one head. | ||
| SONY | KV1954R | Pix in on sides and horizontal, removed tape | Pix in on sides and horizontal. double sided sticky tapeholding c509 on the bottom of the board is affixed to the bottom of ic501across pins 19, 20, 21, 22, 23, 24. | ||
| SONY | EVS700U | No operation | Unit will go into eject mode but accept no other functions.if in eject mode already with the cassette door open, the compartment willnot close unless power is removed. system control ic101 revealed very lowdc, about 1.4vdc, at pins 12 and 15. no regula | ||
| SONY | BMC220 | Very distorted picture, no color | Recorded picture was distorted with no color. tried perform-ing horiz. balance but waveform on tp702 was low in amplitude. voltage onpin 12 of ic701 was low (82v). input to switch (pin 13) was also wrong.base of q704 was -1.9v. | ||
| SONY | TCM5000EV | Pause mode not working correctly | On this unit and on a previous repair, i found that thespring (ref. #357) was broken. when the pause button is depressed, themotor will stop after a short time as s902 is not being turned on. | ||
| SONY | CDP70 | Shorted laser diode | The laser would not come on. we found the laser diode to beshorted. also this unit was similar to the circuit found in supplementi (nov. 1985) with the exception of rv201 and r212 being omitted. wewill install these parts and adjust the laser level. | ||
| SONY | SLHF500 | Tuner does not work | The tuner would not work nor would the channels display.we found ic301/pin 16 on the tm-52 board to be approx. 1.8 volts. thiswas caused by a leaky q305. | ||
| SONY | KV2670R | Intermittent sync, replace l-506 | Intermittent no sync and no color. | ||
| SONY | SL2710 | Wrong replacement part (pinch solenoid) | The replacement part 1-454-365-51 has the wrong plug assemblyon the end of the wiring harness. this replacement part has the largestyle plug and the unit uses the small style. | ||
| SONY | XR740 | Broken head wires | Broken head wires. when the head wire clamp is closed, it issqueezed to the point where the wire is cut inside the insulation. | ||
| SONY | XR66 | One tape channel dead | One wire from head was broken because the crimp on the headwire clamp was too tight. the clamp on the head broke the wire at thepoint where the wire goes through the clamp. this clamp is located onthe head. | ||
| SONY | SLHF900 | Connecting remote commander to audio rem commanders | Can rmt-125 be connected to audio remote commanders forstr-vx750 (rms-750) and str-av760 (rms-760)? sl-hf900 has no info ins/m or operating instructions. | ||
| SONY | BMC220 | Anti motor noise kit for bmc-220 | The polarity of plug is backwards. servicer received two ofthem and both were wrong. motor (focus) would go to the opposite direc-tion. -hq comments: i checked with npc. there are no other reports of thisproblem. pls resolder wires and inform us if | ||
| SONY | CDP701ES | Oscillation on fe test point | When amed 3 or more tracks the sled would not movean osc. of 5-10 vpp would be present on the fe test point. | ||
| SONY | D5 | Will not play all tracks | Will not play tracks 1-3 but will play 4-16. changed opticalblock, same symptom. | ||
| SONY | CDP102 | Intermittent disc toc read and play | Unit would not read toc every time. most times the opticalassembly would scan around and sled would jitter. sometimes disc wouldspin, number of tracks and time of disc would display, and unit wouldjump straight to playing track 1 or 2. te signal was v | ||
| SONY | D5A | Loss of audio | High frequency whine would develop and grow steadily louderuntil audio would stop. unit continued to run normally. | ||
| SONY | SLHF600 | High dropout level | Units seem to be exceptionally susceptible to dropout. theproblem seems to be in all hf600 sets (we have six here in calif.).comparison with sl-hf400 shows the hf400 much much better, although thehf400 and hf600 use the same video board. adjusting rv-3 | ||
| SONY | KV20XBR | Will not power off manually | All functions worked except for manual power on/off. whentrying to power off manually, the screen would blank and all the presetswould change (pix, color, hue). | ||
| SONY | TAV7 | All inputs active | The unit came in with a power supply problem. after resolv-ing that we found that all the inputs (phono, aux, tape, tuner) wereactive. we found the asp ic to be defective. all the dc voltagesappeared normal and clock, strobe, data were present when ca |