TV Repair: Common Faults and Solutions.
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Results: 87426
Results: 87426
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SONY | XR787R | Connectors are mislabled | Mislabled wire colors to cn901, on connector pc board,page 27.this was annoying because i was repairing the burned out wiring when cus-tomer incorrectly installed unit. there are similar errors on cn901 inmanuals for xr-780, xr-747r and xr-740. -hq com | ||
| SONY | F10A | Bad picture (out of focus) | Blury picture, low voltage (focus) of d802 320v (should be420v). low voltage (brt) of d854 20v (should be 41v) on the crt filament5vdc (should be 40v or above). | ||
| SONY | SPP100 | Phone line goes dead intermittently | Customer complains that periodically the spp-100 shuts histelephone line down. he has to unplug the spp-100 from the telephone jackfor a few minutes and then the phone line will reactivate. he has threeregular touchtone phones on this line which do not | ||
| SONY | CDP302 | Unit will not read toc | When disc is in machine and you enter play, unit would focussearch and then stop no play at all. it would play if you would movesled device in with your finger. we found c-218 leaky, which would not a-llow unit to locate inner portion of disc in order | ||
| SONY | CCDV8AFU | Intermittent shutdown | Vtr would either go off or turn on intermittently. this tran-sistor was leaky, causing the flip-flop to change state at random. | ||
| SONY | CCDV8AFU | Distorted sound record or p.b. | Playback of prerecorded tape or tape recorded on unit was gar-bled. checked pin 13 of ic401 and vco frequency was approx. 1mhz. rv402would adjust freq. from .9mhz to 1.29mhz. found bad connection on r434.pin 46, ic401, remained at 2.13vdc all the time | ||
| SONY | KV25VXR | Time activated operation malfunction | When the unit goes into record pause mode, unit shuts itselfoff and memory gets wiped out. found d602/5.6v zener) on (d) board de-fective causing no vertical pulse to pll contr. p4/ic103 and negativepulse at p58/ic2004 (res. out) at the rec. pause insta | ||
| SONY | PSLX355 | Schematic error | On pages 6 and 7 power and ground are indicated reverse towhat they should be on power input connector. hq comments: thank you for your information. we informed tokyo of thisproblem, however, the service manual was correct. | ||
| SONY | CDP255 | Improper chucking arm supplied | When replacing chucking arm on cdp-255, the part listed in thes/m is different than original part. specifically the magnet assy wasnot matched to the spindle so the chucking arm would not properly clampthe disc. | ||
| SONY | ITA650 | Speakerphone problem | Outgoing audio loud and quiet, only when speakerphone is used. | ||
| SONY | CDP707ESD | No play (keep turning the disc) | 1) fop sled lock lever was out of position and prevented fopfrom getting into inner position. 2) no part number for this lock lever. | ||
| SONY | WMF46 | Motor hum (electrical) | Above replacement motor produces a low level (hum) audiblein headphones. used all parts that came with motor - screws, cushions,etc. large amplitude pulse can be seen on scope on black lead wire ofmotor. hum goes away when (pause) is activated. -hq c | ||
| SONY | VTX1100R | Display on monitor (kx) has a rippling effect | The vtx1100r tuner came in dead. the line fuse f201 (1.6a)was blown. the fuse was replaced and the unit worked. the picture on thekx-1901a monitor was good however, the display had a rippling effect. | ||
| SONY | KV4000 | Intermittent vhf tuning | The vhf high channels could not be selected intermittently.we found switch, s-901, to have developed a resistance of about 400Ω.this condition did not allow a complete (low) state in the band-selectflip-flop, causing set to skip to uhf from vhf low. | ||
| SONY | D7 | Part number missing | A part number is needed for the cloth tape used in portable cdplayers to hold down wires in place. -hq comments: the part number is 3-831-441-xx. | ||
| SONY | D10 | Part number missing | A part number is needed for the cloth tape used in portable cdplayers to hold down wires in place. -hq comments: the part number is 3-831-441-xx. | ||
| SONY | KV2780R | Interference pattern, replace ic-651 regulator | During first 15 minutes of operation, set displayed an inter-ference pattern on the screen resembling thin horizontal lines about 1/4to 1/2 inch apart, accompanied by a high-pitched squeal. this patternwas more noticeable on a bright scene. by bringing | ||
| SONY | XR66 | Spurious auto-reverse with new syscon ic (ic801) | Unit would falsely auto-reverse toward the end of a tape. noproblem noted with rotation sensor outputs. original ic801 wastc9310n-050. new sub is tc9312n-040. | ||
| SONY | EVS700U | Shut down at end of tape | Unit would shut down at end of tape. would not rewind. nofunctions except eject. acted as if end sensor was bad. replaced, butsame problem. dc voltages were correct at sensors and q104 and q103 on(md-8) board. | ||
| SONY | CCDV5 | Part number for .25a fuse type ssfr (dead set) | Fuse not listed - need part number. -hq comments: the correct part number is 1-532-770-21. |