Sony Repair Tips
Search: sony
Results: 20100
Results: 20100
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| SONY |
KV36XBR200
AA-2H |
Arcing | Kv36xbr200 unit has an intermittent arc over that will shut down the television. | The best way to tell if the arcing is related to the hv lead which may be breaking down is to use a high voltage probe. connect the ground to the crt ground and run the tip of the high voltage probe over all high voltage connections & wires. if an arc is drawn to the probe tip this would mean that a break down in the insulation has occurred. this test revealed a break down in the high voltage connection at the high voltage anode button. the silicone sealant did not seal between the hv button and hv cup. cleaning the area around the anode button, replacing the anode cap and resealing the connection with high voltage silicone sealant. | Muller |
| SONY |
KV32FV1
AA2H |
Tuning | Kv32fv1 serial 9002390 main tuner will not tune any channels but the pip tuner is fine. tuner was changed without any change in the symptom. set just displays snow on all channel from the main tuner and the osd for main channel display is normal. | I had tech check the b+ on the tuner that are stamped on the board. the 9, 30 & 5 volts are normal. the scl line is only 2 volts and the sda line is 4.6. the scl line is the trouble. tech did not have an oscilloscope but since the scl line for this tuner is the same for the pip tuner we concluded the cpu was not at fault. tsound appeared to be an open between the scl of the main tuner and cn1101(6). since the traces on the cba are so thin the and no cracks in the board material could be seen the decision was to install a small jumper wire between these two points. this corrected the | Muller |
| SONY |
KV32FV1
AA2H |
Remote | Unit does not operate with remote control. front panel controls are operating ok. | Unit has ""0"" volts on the output of the ir receiver ic2001(1) this should be 5 volts as long as it is not receiving data. customer has an rca dvd player connected using the s-video input and the s-link too. sony's s-link is not compatible with rca's g-link input used to control operational functions. disconnect the s-link / g-link connections and restored operations. "" | Muller |
| SONY |
KV32FV1
AA2H |
Remote | Kv32fv1 unit does not operate with remote control. front panel controls are operating ok | Unit has ""0"" volts on the output of the ir receiver ic2001(1) this should be 5 volts as long as it is not receiving data. customer has an rca dvd player connected using the s-video input and the s-link too. sony's s-link is not compatible with rca's g-link input used to control operational functions. disconnect the s-link / g-link connections and restored operations "" | Muller |
| SONY |
KV32XBR200
AA2H |
No high voltage | Kv32xbr200 9015636 unit will click on then it will turn off again. does not get high voltage. | Unit has b+ to horizontal output but no horizontal drive. if the horizontal output is removed the set will produce the necessary drive signals. collector of h. driver q501(c) measures 85 with horizontal output removed. unit appears to have a shorted flyback or a problem in the horizontal output section that caused the ocp circuit to attack. product had a defective flyback transformer. | Muller |
| SONY |
KV36FV1
AA2H |
Geometry | Kv36fv1 serial . unit has shoulder roll off on the screen. | Gave tech bulletin #387 for the yoke upgrade | Muller |
| SONY |
KV32XBR200
AA2H |
Geometry | Kv32xbr200 unit has just had the new crt with the attached yoke replaced today to correct the shoulder roll off symptom as described in bulletin 387r2. however the new tube and yoke did not solve the vertical pincushion symptom | See bulletin #387r1 | Muller |
| SONY |
KV32XBR200
AA2H |
Geometry | Kv32xbr200 unit has just had the new crt with the attached yoke replaced today to correct the shoulder roll off symptom as described in bulletin 387. however the new tube and yoke did not get installed. instead we are going to contact sony | Bulletin 387 did not mention a thl plate which needed to be adjusted was in the old deflection yoke. after following the new bulletin 387r1 we were able converge the set. also the new tube needed 3 magnetic on the bell of the tube to correct a purity error and converge the lower right hand corner. | Muller |
| SONY |
KV32XBR200
AA2H |
Geometry | Kv32xbr200 serial # 9018039 .unit has ""shoulder roll off"" symptom as described in bulletin 387. tech will be ordering new yoke and needs the part number "" | We have replaced several yokes so far as of 4-2-99 with limited success. performing a complete setup of purity, convergence and geometry setting corrects most of the geometry errors. however this set will not be perfect. | Muller |
| SONY |
KV32XBR200
AA2H |
Geometry | Kv32xbr200 serial # 9008075 .unit has just had the new crt with the attached yoke replaced today to correct the shoulder roll off symptom as described in bulletin 387. however the new tube and yoke did not solve the vertical pincushion symptom | Bulletin 387 did not mention a plate which was in the old deflection yoke. the missing thl plate needed to be removed from the old yoke and placed in the same slot in the new yoke . after following the new bulletin 387r1 we were able converge the set. | Muller |
| SONY |
KV32FV1
AA2H |
Focus | Kv32fv1 unit has poor focus on the left and right side of screen but ok in the center. if the focus control is varied through its range the sides will become in focus with the center out of focus. | Since this set has the super flat crt. it incorporates a dynamic focus circuit. in other words the focus voltage varies as the beam travels from left to right. measuring the horizontal parabolic wave form up to the input of the primary of the df transformer, we found the signal to be normal. we were unable to measure the voltages further because they were potentially focus voltage potential. the horizontal parabolic wave form enters the flyback at the secondary of the df transformer. unit had defective flyback transformer. | Muller |
| SONY |
KV35XBR48
AA-2 |
Wrong color | Kv35xbr48 serial 01901543. customer using this television on a dvd player and has it connected through the ""yuv"" inputs. the gray scale is favoring the green color temperature even if no color is present on the screen. playing back the same signal in the composite input or the s-video input the color temperature is normal with normal black and white tracking. it is thought that a separate black and white tracking or rgb drive adjustment in the yuv mode will solve this trouble. "" | According to sony tsound isn't any drive adjustments in the yuv mode. this symptom shows up on another sony television of the same model. sony claims this is a normal function and tsound are no plans to address this phenomena. tsound is nothing wrong with the television it is operating as designed. | Muller |
| SONY |
KV32V20
AA-2 |
Video | Kv32v20. unit has poor contrast. tech has to raise the g2 just to get a raster. when the raster appears the picture is washed out and lacking good contrast ratio. | Gaining a little more information from the tech i found out the set actually had a ""no raster"" condition, and the timer led was flashing. the g2 was increased tin order to get this washed out picture. the probable cause of this problem is the ik pulses may be too low for the jungle ic to correctly interpret them. by raising the g2 voltage the ik pulses are raised up to a point wsound the jungle will acknowledge them. but by then the rgb drive is too great and a overdrive condition occurs on the crt. tech needs to check the components in the ""ik bμFfer circuit on the ""c: board d1792= 3.9 volt zener diode, & q1790=2sa1309a "" | Muller |
| SONY |
KV36FV1
AA-2 |
Vertical sweep | Kv36fv1 unit has insufficient vertical sweep and vertical foldover at the bottom of the screen. | Suggest the tech try to replace the charge pump diode and pump up capacitor d561 & c565. this did not correct the symptom. but it was found while moving the wires around the yoke connector the symptom replaced slightly. but when tugging on the wiring going into the deflection yoke the tech found a significant replace in the vertical deflection scan. tsound isn't a schematic for the yoke assembly but a small connector inside the yoke housing wsound the 3 controls were mounted. the connector is called p16.it was not soldered very well. it had thin solder across the land to the pin but what looks like pin oxidation it from making a good electrical connection. resoldering the connection returned the set to | Muller |
| SONY |
KV35V35
AA-2 |
Vertical sweep | Kv35v35. unit has not vertical sweep and no sound. | No vertical drive from jungle chip. data and clock normal. jungle chip has been replace several times with no effect. eprom was replaced too with no effect. but the cpu ic001 repaired problem. | Muller |
| SONY |
KV32S45
AA-2 |
Vertical lines | Kv32s45. serial # 8047063. unit has a thin vertical lines in picture that are spaced 1 inch apart on the left side of the screen. it can be scene on all inputs. best seen on scenes around 10 ~ 20 ire. | The description sounds like jail bars caused by a ringing in the b+ to the flyback transformer. it is suggested to install a capacitor with a value of 33 mfd at 250 vdc in place on top of chassis in positive side to fb503 and negative side to ground. this simply increases the capacitance on the 130 volt line to the horizontal output section, and reduce ripple caused by the hard demand of current when the flyback is switched on. part # 1-107-654-11. this minimized the effect | Muller |
| SONY |
KV32XBR48
AA-2 |
Vertical | Kv32xbr48 this is a aa2c chassis. the television has no vertical sweep, and no sound. tech replaced the vertical output ic without correcting the symptom | Tech is trying to cure the vertical sweep defect but the not the sound. these are related to each other. this set will not develop vertical sweep unless tsound is data communications between the microprocessor and jungle ic. tech needs to monitor the sda & scl lines that are marked on this chassis. if tsound is a short on either line the set will loose vertical sweep. clue is you need the scl & sda lines to control audio, if a short is on these lines or data is corrupt the set will have no audio too. tsound was no data or clock on the ux board. checking the presence of 9 volts we found it to be only 7 volts. monitoring the protect diode d261 zener diode on the sda line. unit had a defective d261 on the ux | Muller |
| SONY |
KV32S25
AA-2 |
Uneven brightness | Kv32s25. unit has bright glow at top of screen. unit had 8 volts at pin 5 of vertical output chip. it is supposed to be ""0"" volts. also unit has no audio. "" | Both 2 and 4 of ic1501 are +12v and -15v.. appears to have the wrong inputs to the vertical output chip. data line shorted to ground. the clock line sitting at 5 volts with no clock signal. removal of the pip module restores the normal operation/ unit has defective pip module. | Muller |
| SONY |
KV32S22
AA-2 |
Uneven brightness | Kv32s22. unit was dead. has a glow at the top of the screen only when the g2 voltage is increased. | Unit is missing the -15 volt power supply voltage to the vertical output | Muller |
| SONY |
KV32S20
AA-2 |
Uneven brightness | This product has a strange glow toward the top of the tube. sort of an out of focus raster but only at the top 1/5 of the tube. | When raising the g2 voltage it was discovered the crt had a uniform brightness wsound the top of the screen was brighter than the rest in the crt. measuring across the vertical yoke windings we found a8.5 volts. it should be ""0"" volts if the vertical output is working. it was also discovered the -15 was missing. tech needs to look at d530 and r537 a 0.47Ω resistor. unit had bad diode, resistor and vertical output "" | Muller |