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Sony Repair Tips




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Search: sony
Results: 20072
Make Model Symptom Problem Solution By
SONY TFM7720W
Defective oscillator No fm. all voltages looked good. all transistor wereconducting. osc. was not working.
SONY PSX45
Revolution noise This unit produced a heartbeat sound (one per revolution ofthe platter) which increased in intensity as the tonearm moved toward thecenter. this noise was being magnetically induced in the cartridgewindings. scoping the motor drives revealed spikes on
SONY ICR4800
No am reception No am.
SONY ICF2001
Could not receive am stations Pins 2, 11, 12 and 13 of ic201 were inconsistently outputtingdata. latch ic205 was not able to switch antennas to receive am stations.
SONY KP5040
Poor blue resolution, replaced blue crt This unit had poor blue resolution and some bleeding.
SONY KP5000
Color distortion This unit would change the width of the green raster by twoinches when going from min to max brightness. the unit would alsoconverge ok on internal generator and then when it went back to video, theunit would be misconverged but would still check ok on
SONY KX2501
Dead, replaced q651 and q653 Unit came in with q652 shorted and seven amp fuse blown.found that excessive current drawn beyond 65v ac when variable inputtransformer turned up. this was with b+ unloaded from power circuit.individual measurement of power supply components showed both
SONY KX2501
Lines across screen top and bottom, normal (support wire) When viewing monitor with no video there are faint whitevertical lines across the screen. this appears to be horiz. pulsespossibly from the scan derived b+ voltages. customer noticed these whilerecording with camera and became very critical. he insist
SONY KV8000
Shut down Set works fine for an hour or so then goes dead. will comeback on and repeat.
SONY KV2650R
No operation, replaced d021 Unit cannot be turned off except by master switch, no functionon any mode, i.e. power on/off volume up/down, channel up/down, pictureup/down etc. voltage on pin 2 on ic001 was high (4.8v). found d021leaky (500k).
SONY KV2648R
Snow picture, r557 changed value The picture exhibited light snow on all channels all thetime the unit was on. after 5 to 10 minute warm up the picture shrankabout 2 inches vertically.
SONY KV2648R
No tuning operation, replace prescaler This set would not tune in any channel when the tune-upbutton was pressed. the tune-down button would work fine. all channelwere tuned in.
SONY KV2648R
No picture, replaced q602 and q603 It first appeared as if q602 shorted and that replacementwould solve the problem. however after about one hour it would shortout again. q603 was discovered to have e-b leakage.
SONY KV2647R
No operation, replace ic-502 Set would not come on, no sound or picture. found ic501loading down vcc on chip to 2vdc, should be 12.5vdc.
SONY KV2647R
Incorrect tuning, resolder r-085 When unit turned on, it would come on with different channel.
SONY KV2647R
Faint lines on the screen Faint lines on left side of picture. these are vertical linesspaced about one inch apart. they vary in thickness from one eighth inchto nothing as they approach the center of the screen. -hq comments: slight ringing (vertical bars) visible on low brig
SONY KV2145R
No picture, resolder c534 Set would blow the horiz. output, at low voltage. i noticedh. frequency doubled. found c534 not grounded.
SONY KV1948R
Picture distortion (slight tear), normal A slight horiz. band/pull under conditions of varying beamcurrent. scene changes or large areas of light next to dark. this bend/pull is very slight and i have observed the same symptom on otherkv-1948r models. we have given careful attention to the b
SONY KV1947R
Poor remote operation, replaced ic101 Intermittent (2-3 weeks) operation in remote and push-buttonfailure.
SONY KV1947R
No vhf, replace ic002 Set had uhf operation but no vhf operation. no vc was presenton tuner. all switching voltages were correct and verified against akv-1948r. applying external dc to vc line tuned all stations.