TV Repair: Common Faults and Solutions.
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Results: 87416
Results: 87416
Repair Guide: Common Issues and Fixes
Brand | Model | Fault | Detailed Problem | Solution | By |
---|---|---|---|---|---|
SONY | WMF10 | Motor noise | Servicer has had several complaints of motor noise throughhead phones. this problem does not show up on wm-10 but only on wm-f10. -hq comments: electrical motor noise occurs when the b+ line is furthertaxed by: 1) loaded motor 2) decayed battery 3) l | ||
SONY | WMF1 | Open rv-1 | When receiving stereo fm signals the sound was distorted.we found rv-1 to be open - vco adjust. | ||
SONY | WM10 | Loose spring | Small hair spring that sets in plastic groove of auto shutoff part of pinch roller comes out of groove and unit will not start toplay auto shut off taken over. | ||
SONY | TCK555 | Defective ic202 | Unit would go into rec mode, however reel tables would notturn and it would eat tapes. found that b+ (10v) to board was low.isolated problem to shorted ic202. | ||
SONY | TCFX44 | Defective ry301 | This unit would play back fine. however when recording therewere intermittent passages with motorboating. we found ry301 (whichswitches the head between pb and rec) to be defective. this caused a poorground connection on the head. | ||
SONY | TAAX500 | Fractured ground lug | With the volume control set at minimum there is an imbalancein the sound level and static in one or both channels. | ||
SONY | STRVX550 | Missing part number in manual | No part number for fm tuner in s/m. fm tuner number isa-434-402-9a. | ||
SONY | STP75 | Defective control upc - ic603 | This unit did not light any display segments and there wasno tuning. a check of - control upc - ic603 revealed that the ic wasinoperative. | ||
SONY | RS30 | Short on secondary of t901 | No power. spring connector was bent towards pc board,shorting to ground the secondary of t-901 (power trans). | ||
SONY | PSLX500 | Audible noise | Low level thump or rumble like noise is heard when everhorizontal drive motor moves tonearm. | ||
SONY | PSF5 | Instructions in manual | Page 17 of service manual, in order to perform verticalbalance and horizontal balance we recommend using a 70mg, a 245mg anda 315mg weight. servicer has asked if we have a p/n for these weights. -hq comments: use the following number of washers to get | ||
SONY | PCMF1 | Defective ic531 | Sound breaks up (muting) on e to e and on playback ofprerecorded tape. found vco drifting. found no dc change at output ofic531 pin 1 although input to pin 3 was changing. | ||
SONY | MTL10B | Defective q511 | All functions inoperative. unit had been worked on by dealerand microprocessor had been changed (ic502). found that there were nokey scan pulses to pins 30/31/32 and ic502. | ||
SONY | M205A | Defective panasonic cassettes | I have had several instances of erratic or non-operation ofm205a at the pittsburgh fsc counter. in all of these, the customer wasusing panasonic mc60 cassettes. replacement with sony mc60 cassettescured all problems to satisfaction of customer. | ||
SONY | ICF2001 | Defective ic201 | The am was very weak and only strong stations could bleedthrough. we found the problem to be caused by incorrect bandswitching.we found ic201 to be putting out the wrong commands. | ||
SONY | ICF2001 | Defective filters q32/q51 | The fm muted above 89.20mc. am worked fine we found the pwmnot being properly filtered out of pll-1. | ||
SONY | CFS99 | Substitute part was smaller | Substitute part was smaller. -hq comments: late production cfs-99s used a larger gear (an) identifiedby p/n 3-579-641-00. please make a note in your s/m. | ||
SONY | CFS45 | Replacement part is smaller | Replaced tape transport with x-3570-050-1. found motor switchnot being activated due to arm on brake lever being too short to reachswitch. transport p/n x-3570-050-4 has correct length arm. | ||
SONY | CDP701ES | Dead unit | The dead unit had ic108, ic109, ic110, ic801 - shorted.ic108 was physically melted, with a hole in the chip. we can duplicatethe problem by shooting c218, c214, c138 to ground for a fraction ofa second. | ||
SONY | CDP101 | Fusible resistors r390 and r391 | Door opens slow. r390 and r391 was charred and ic304 wasreplaced as precaution. |