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Sony Repair Tips




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Search: sony
Results: 20072
Make Model Symptom Problem Solution By
SONY KP7220
No picture, connector da-5 intermittent Connector da-5 gets loose and causes picture tubes to blankout, can also cause a line on green tube which burns to mark in tube.
SONY KP5040
Poor focus, replaced hv block Unable to get a good focus. problem traced to high voltageblock.
SONY KP5040
Dead, replaced cx171, q5521, q5522 Set would not turn on. servicer found cx171 defective whichis believed to have caused q5521 and q5522 to short, fuse found defective.
SONY KV2145R
Set locks on ch 88, replaced ch indicator nd3101 Set was locked onto channel 88, unable to clear or change.found pulse out of ic001 on mf board loaded down. traced problem tochannel indicator display nd3101 on ta board. pin 3 on display isshorting to something inside display loading down pin 40 on ic
SONY KV2141R
No picture, leaky d511 zener Unit completely out of horizontal frequency. at pin 8 ofic501 the dc voltage reads 4v instead of 10v. trouble traced back toleaky d511 (rd15e).
SONY KV1945RS
Picture distortion, replaced ic501, cx-557 About the top 10 scan lines were stretch, very hard to detectbut customer complained. vertical output waveform could see ringing,apparently leakage in the ic from horizontal.
SONY KV1921
Shut down Unit shuts dowm erratically. this problem confused theservicer because the original problem was a shorted damper. when ac wasapplied, the unit ran fine up to about 90v ac in then suddenly guit.by using light bulb technique we located q510 breaking down
SONY KV1913
No sound No sound, momentary raster. found q206 and q205 leaky whichdrags the 135 b+ low (70v).
SONY KV1913
No vhf low No low (2-6) channels. could not get high (7-13) band toturn off. found d101 leaky.
SONY KV1910
Faint retrace lines on specific channel only Faint retrace lines only on channel 7. this problem appearedonly when the set was turned to cable 7. it was observed that thevertical sync pulse was compressed on this channel. this resulted in5-6 retrace lines appearing at top of screen. linearity w
SONY KV1207
Picture noise Vertical bars across screen, excess ringing off 190v line offlyback. c540 was missing from circuit.
SONY KV1207
No low vhf No low vhf channels, voltage on q102 remains high regardlessof band switch position. found d059 diode on m4 board leaky.
SONY KV9400
Set would lock on one ch Could not change channels. checked the 33 volt line and foundonly 5 volts. traced to a leaky q18 transistor.
SONY KV3000
Intermittent loss of red color Customer complained of intermittent loss of red in the color.servicer found bad connection at base of q1344 on the b board.
SONY KV2648R
Shut down, replace ic601 and others Shut down. indicator light comes on momentarily after turnon.
SONY KV2602
Dead, replaced q601, d501, b rect, etc Set dead. no sound, no picture. found defective the follow-ing parts: bridge rect. power module, q601 transistor, d501 zener diode,and 5 amp fuse.
SONY KV1946R
Dead, replace q901 and q602 No sound - no picture. found q901 and q602 shorted.
SONY KV1945RS
Shut down, solder splash Immediate shut down after turn on - less than 1/4 second.dealer suspected shut down circuit or power supply but could not evenpower on oscillator. all sweep voltages checked with meter showed 0Ωat 15v line. 15v line on md board shorted to ground.
SONY KV1945R
Picture distortion, replaced hlc Complaint about horiz. linearity specifically when writingtransversed screen. replaced hlc with p/n 1-459-136 (hlc from 1930r).problem resolved. expect inductance of hlc (1-459-316) too low. pleasesupply definite fix - have had 3 complaints to date.
SONY KV1923
Sound distortion, replaced d2006 When set was first powered up, volume was maximum and couldnot be lowered. unit was turned off and restarted with no sound now atall. checking output of a/d convertor, tns3701bns, found no pwm signal.measured standby supply voltage, pin 8, with power o