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Sony TSS Logs
BRAND
MODEL
Chassis
Sony
KV36XBR250
Sony
KV32S40
Sony
KV27V66
Sony
KV27V10
Sony
KV32V40
TSS Logs for Sony Television Products SYMPTOM CURE Customers DVD player always plays back in 16X9 mode. Customer has JVC DVD player. Disc plays back in 16:9 customer selects 4X3 mode on their DVD player but TV stills displays 16X9. The JVC DVD This auto feature can be turned off but only in the Service Mode. player puts out ID signal even when no Change ID7 from 9 to 8. This is the No Auto V. Customer must AA-2W 16X9 mode 16X9 is available. When the Sony TV now select modes manually on their DVD player. detects this special ID signal it automatically puts the TV in to the 16X9 mode. Compression Mode. Customer must now select modes manually on their DVD player. The hum is a result of magnetic flux from the vertical deflection KV32S40 serial 9028282 that has a low yoke. The 60 hz is radiating into the low level audio circuits through level audio hum in the video input or tuner inductive pick up from lead dress and ground loops. To minimize AA-2 A.C. Hum mode. Looked in the FPR on web site but these Remove JW086 and JW1007.Add 22AWG wire from JW270 could fine nothing on the subject. The hum to ground side of R477. This wire should be on the top side of the Aboard and routed to following the audio signal lines from IC1401 is at 60 Hertz (audio processor) to the amplifier IC1461. I asked tech to check to see if the upgrade listed in CSV #397. Jumper are present in the correct spots of the "K" board. Tech can measure 9.6 volts buzz at speaker terminals. However with the Unit has a slight 60 Hz buzz in the speakers disconnected the customer still claims to hear the 60 hz BA4 A.C. hum speakers. When in the external input mode buzz. It this is true the tech needs to look into the deflection yoke and no signal applied the hum is evident. for a cure the buzzing. By putting pressure on the yoke, the tech can try to eliminate the vibration in the yoke assembly caused by loose laminations. Our tech plugged in the set and found the set did have a spark as soon as the set was plugged in the AC outlet. This is perfectly KV27V10 serial 7104657. When the CATV normal because this chassis has to fully charge 2 820 mfd rep was out a few days ago he plugged in electrolytics in a voltage doubler configuration. This causes a the set in to wall and when the prongs tremendous amount of in rush current that may draw several made contact with the AC wall outlet a AA-2 AC leakage claim amperes until the filters are charges up. This will cause a contact small spark was seen. The CATV rep arc the moment the set is connected to the AC line. This set poses exclaimed, "The television is a fire hazard, no more fire hazard than any other electrical device that plugs into and you need to call for service!" He left the the AC outlet. We also performed an A.C leakage test on the set unplugged and we went out on this day. chassis and found that it was less than .015 volts measured at the customers ground connection and neutral. Tech will need to go out with an variable audio tone generator to see where the source is of this mechanical vibration. Once found the tech must apply a special tape to the mating surfaces of the KV32V40 serial Unit has an acoustical BA4 acoustal vibration cabinet parts that are vibrating as stated in bulletin 244R1. This vibration on certain frequencies. bulletin does not actually apply to this model but the approach to the repair is the same. Part # of the tape necessary for this job is 7632-661-51 KEYWORD
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Sony TSS Logs
Sony
KV27XBR10
FN
AFT
Sony
KV27V40
BA4
all snow
Sony
KV32V25
AA-2
arcing
Sony Sony Sony
KV32V26 KV35V76 KV35XBR48
AA-2 AA-2 AA-2
arcing ARCING ARCING
Sony
KV36XBR200
AA-2H
arcing
Sony
KV27S20
AA-2
Audio
Sony
KV27S36
AA-2
audio
Sony
KV27S45
AA-2
AUDIO
Sony
KV27V65
AA-2
AUDIO
Unit needs to have the IF/Demodulator module removed from it's KV27XBR10. Serial 7009564. Unit has AFT shielded compartment and resolder all the adjustable tuning drifting as soon as the channel is transformers. The AFC coil/transformer has ring fractures around addressed. It never stops the AFT search the pins that protrude through the circuit board. KV27V40 Unit will not change channels. Tech needs to check the SDA And SCL lines to the tuner. When The number changes but the set will only the set is on the Clock line at the tuner has a pulse but the SDA is display a all snow image. Tech replaced Low. No data pulses. Unit had a scratched trace leading to the the tuner and it did not solve the symptom. tuner assembly/ Jumpered trace and tuner now runs correctly. KV32V25 serial 7036251. Unit has an Tech noticed the +15 volt source was lower than expected. It was arcing inside the flyback transformer. Tech only 10 volts. It is not unusual. The voltage is normally 12 volts. replaced the transformer now the unit has a What the tech was missing is the -15. This voltage must be there in bright band at the top of the screen. The order for the set to have any vertical sweep. D530 was shorted and tech replaced the jungle "IC without open R536 the 0.47 ohm current limitter. effecting the symptom KV32V26 serial 8019814. Arcing in the Tech will need replacement CRT A80JYV51X neck off CRT KV35V75 CRT is arcing in the neck The CRT is bad. KV35XBR48 serial 9014229. TUBE unit will need CRT A89LJT80XZ ARCING IN THE NECK 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 KV36XBR200 Unit has an intermittent arc probe tip this would mean that a break down in the insulation has occurred. This test revealed a break down in the High voltage over that will shut down the television. 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. Problem is best heard in the video input mode with no signal put to Sony KV27S20. Unit has a low pitch whine the input. It can be seen with an oscilloscope on one of the output in the left audio channel. pins of IC1401 but not on the input. Part number is 8-759-369-39. IC1401 corrected the trouble. All SAP, Stereo, and mono functions come from the Tuner assembly and nowhere else. If a problem exists for the S.A.P. Sony KV27S36. Unit has choppy SAP feature all circuitry relating to the feature is replaced when the tuner audio. Stereo 0.K. assembly is replaced. Recommend the Tuner/IF/MTS decoder assembly. Replacement corrected the symptom. KV27S45 serial 8046950 Unit has a very Tech needs to add a resistor in parallel with R432 to effectively rapid change in volume when increasing reduce the value of R432. This changes the voltage divider ratio to the level from minimum to 4 notches above the volume control circuit and makes the volume circuit more linear minimum in operation. Audio level adjustments will not increase in A new microprocessor is available for this unit. It is part number Ta linear fashion, instead the audio will 998-600-32. It replaces the original IC001 which was M37273MFincrease rapidly in the first 1/3 of the bar 251 graph.
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Sony TSS Logs
Sony
KV27V65
AA-2
audio
Sony KV27V65 Sound does not ramp up correctly. Seems to get very loud as soon as the volume gets higher in a very short time
I had tech get into the ID codes and reset ID2 from 239 to 175 and ID 4 from 130 to 194. Then initialize the EPROM . Set returned to normal operation
Sony
KV32S65
AA-2
audio
Sony
KV32XBR10
ANU-1
AUDIO
Sony
KV27V40
BA4
audio
I had the tech try to measure if there was any DC voltages that resided on the Variable audio output connectors. There was "4.5" volts on the Right channel and "0" volts on the left channel. When the "Mute" transistors on the variable line triggered they pulled both lines to ground. When the external amp was connected to this KV32S65. Serial # 8014575. Sound and circuit the input capacitor for the right channel charged with this 4.5 picture is fine but when the fixed or variable volts. We still had audio on this line even though it was at a 4.5 vdc audio out is connected to an external audio potential. But when the Sony muted, the input capacitor inside the amp and the set is muted a loud pop is Big External amp discharged and caused a tremendous pop. heard in the right channel. C172 is a .47mfd used to decoupling the audio from IC101 the Variable audio control IC. This capacitor had 4.5 vdc on each leg measured to ground. Removing the capacitor and measuring the DC resistance across the cap measured 175 ohms. Replacement of the capacitor corrected the symptom. 8-741-592-2 (8-741-100-56) original number SBX1592-02 Unit has no audio corrected the symptom When Isolating the mute transistors I find that removing the Coupling capacitor C223 stops the muting action. This capacitor appears to be monitoring the B+ used for the audio output IC. We do have a slight fluctuation of voltage 0.3 ~ 0.5 volts to the audio KV27V40 8024539 Unit goes looses audio output when the volume is maximized out. this is coincident to load on voice peaks or when ever the volume is variations of loud to soft sounds However when this variations reach the 0.5 volt deviation the audio will mute. R210 is good and moved to a high position the volume will so is Q204. We replaced C223 with a new one and even tried to mute for about 1 second reduce the value to 1 mfd but we still get the same muting effect on voice peaks. IC401 has been replaced on an earlier visit with no changes in the symptom. It is unknown why this is causing this symptom. KV27V65. Unit has a 60 hz buzz in the audio will near minimum level is selected Unit has no audio, but when entering the service mode the audio returns. After resetting the EEPROM the set enters the reset mode normally but the sound is gone again. Tech replaced IC001,IC003 and Kboard, without effecting the symptom. Tech needs to add a ground wire to the ground side of R544 to the ground under the flyback transformer All had checked all voltages on the IC301 and everything looked normal. Out of desperation the tech ordered the IC301 and changed it. Tech changed the jungle IC301 and it fixed the problem. This answer might save someone some time? The tech was very happy to let this baby go home after wrestling with it for many hours! Thanks to Jesse Mann (L. A., California)
Sony
KV27V65
BA4
audio
Sony
KV27V16
BA5
Audio
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Sony TSS Logs
Sony
KV24FS100
BA6
Audio
Solution: Replace IC404 - audio output. Sony installed wrong IC. Problem: Volume control doesn't work. Instead of AN17820A they installed AN7125Z. The correct part # is Volume bar OK just volume stuck in high / 6-701-104-01 (AN17820A) I had already three units with the same loud audio. problem. All of them KV24FS100 (BA6), serial number 4108227,4108225,4108261. KV32TS27 7039676 Unit has an intermittent squeal in the audio when trine Tech needs to replace the Audio IC SBX1627-11 to receive a stereo broadcast.
Sony
KV32TS27
LN1
audio
Sony
KV27S42
BA4
Sony Sony
KV35XBR35 KV27S22
AA-2 AA-2
Sony
KV35S26
AA-2
Sony
KV35S26
AA-2
All TV's that use autoprogramming must have 2 inputs to the CPU that will tell the CPU it will store a channel in its memory. These inputs are AFC crossover voltage & presence of horizontal sync. The AFC get the frequency of the video carrier centered in the passband of the IF. The horizontal sync is used to validate the KV27S42. Serial 411756 Unit does not autoprogram. When using direct access to signal is a non-scrambled video signal. This television did not have the Horizontal sync from IC010, an HSYNC-SW. This device is change channels the set will execute AUTOPROGRAM channel change but takes nearly 4 seconds used to detect valid horizontal sync from both tuners. There was composite video at IC010(1) but there was no output on IC010(7). before it will lock in. channel the set will Neither one of the tuners had good channel lock in characteristics. access it Suggest the tech check out IC010. IC)10 had a contaminate under the chip. It was a light brown compound that covered all pins under the IC. The contaminate was removed and the old Chip reinstalled and the set operated normally. KV35XBR35. Unit has color temperature According to Sony tech support there is no adjustment for this B&W Tracking error in the YUV input mode only input. Refer this customer to Sony customer affairs. KV27S22 serial # 8102548. Unit goes to a Unit has a defective CRT. When unit is able to turn back on again BRIGHT RASTER bright blue screen with retrace lines then the set will sometimes be in the video input mode. shuts down. This symptom acts like it is a problem with the satellite receiver. Inside the satellite receiver there is a NTSC encoder which injects KV35S26 Unit has the tint phase shift and the 3.579547 MHz color oscillator signal in the video. If this color lock up problems only on the Hughs CHROMA oscillator is too far off frequency it will not phase lock with the satellite receiver. VCR and over air signals 3.579545 MHz in the television. This is a software problem with the have solid color lock up. Satalite receiver. A software download will be available to all receivers in Late 2000 to correct this problem. Suggest the tech look very close to the connection s to IC351(4) This the Chroma AFDC filter. Components R354, C354, & C355 Unit has random chroma phase shifting. are in the AFCFIL circuit. It is possible the trouble is a Jungle IC but The tint will vary radically. NTSC color bars Before replacing it is recommended to check the aforementioned chroma are not stable. "Barber Polling" effect of components first. Note: when checking the components it was colors on bars. found that C354 has glue touching each end of the device. The glue effectively changed the value of the device. Cleaning the glue and reinstalling the device corrected the problem.
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Sony TSS Logs
Sony
KV35XBR200
AA-2
CHROMA
KV36XBR200 When the customer is using the RF input labeled VHF/UHF the set will picture will lose chroma intermittently. But when using the AUX input the chroma is solid and does not vary. The tech replaced the RF switch without effecting the symptom. Unit is connected in to component video input mode through a DVD player. The picture has a predominately green picture
The customer is using two different RF sources. Cable TV and a satellite dish. The CATV is being feed into the RF input labeled VHF/UHF and the satellite is fed into the AUX input. It appears the tuner does not correct the AFT when two different RF sources are used. The channel will has to be readdressed again for any AFT correction to occur. Suggest the customer used the satellite in the S-video and separate video input mode. In his present configuration the customer is loosing all stereo reception, and all high frequency detail over. This corrected the symptom. When operating a different DVD player the symptom is the same. There is no cure to this phenomin from Sony at this time
Sony
KV35XBR48
AA-2
CHROMA
Sony
KV27V66
BA4
clock
Sony
KV27S20
AA-2
CLOSED CAPTION
Sony
KV27V20
AA-2
CLOSED CAPTION CLOSED CAPTION CLOSED CAPTION
Sony
KV27V20
AA-2
Sony
KV27V20
AA-2
Sony
KV27V20
AA-2
CLOSED CAPTION CLOSED CAPTION
Sony
KV35V75
AA-2
Sony
KV32V15
AA-2
color banding
The clock should remain within 7 seconds + or minus in a seven KV27V66 serial Unit looses 3 minutes a in day period. The time base is from a crystal and the count down 2 weeks on the internal clock in the circuit inside the microprocessor. Suggest the tech replace the television crystal, and the two padding capacitors in the crystal network. KV27S20 serial # 7042141 Unit will not Tech needs to order IC001= T-935-001-61 per bulletin R329R1. operate in the closed caption mode if using After replacement the tech will need to enter the tech menu and the DVD player. However if the television select "CRIW" and change it from 15 to 3. Also check the "LBLK" operates in the tuner mode for over the air must be 7, "RBLK" must be 7 and "HBSWO" must be 0. At this point save the new data and exit the tech menu. telecasts, closed caption works fine. The tech needs to set the ID codes to the following ID0=25, ID1=19, ID2=47, ID3=0, ID4=27, ID5=3, ID6=0, ID7=0. If these are KV27V20 8015729 No closed caption on OK then the tech will need to replace the IC001 with an upgraded premium channels version per bulletin 329R1 Original generic # is CXP85640-004S, the new generic # is CXP856P40S-1 part number T-935-001-61 KV27V20 serial 8015729 Unit does not See Bulletin 329R Original CPU CXP85640-005S The new device have closed caption on premium channels is CXP85640-006S The tech needs to set the ID codes to the following ID0=25, ID1=19, ID2=47, ID3=0, ID4=27, ID5=3, ID6=0, ID7=0. If these are No closed caption on premium channels OK then the tech will need to replace the IC001 with an upgraded version per bulletin 329R1 Original generic # is CXP85640-004S, the new generic # is CXP856P40S-1 part number T-935-001-61 Sony KV27V20.unit has intermittent Unable to see any problem with circuitry, and ID codes are correct. symptom of closed caption coming up on All appears normal. Setting all CC1 ~ CC4 and teletext 1 and 2 to screen. Cust claims they cannot turn off the the "Minus" option this effectively shuts off the closes caption closed caption option. feature. Instruct customer to operation od CC modes. KV35V75 9006691 Unit does not have Original CPU CXP85640-005S The new device is CXP85640-006S closed caption on premium channels CPU was replaced and did not correct the symptom. Resistor R354 was not soldered in correctly. The resistor is in the Sony KV32V15 serial 9013716 AA-2D Unit Color AFC circuitry. It had a .15 ms ripple on it causing a phase has horizontal banding of purple and red at shift in the chroma in the first 4 to 5 inches on the picture. Problem top of screen. If the color was reduced the was caused by a glue used to secure the surface mounted resistor. banding would disappear. Color bar did not The glue prevented a good connection of the resistor to the pad. have a normal appearance Cleaning the glue away and resoldering corrected the symptom.
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Sony TSS Logs
Sony
KV32XBR45
AA-1
CONVERGENCE
Sony
KV32XBR45
AA-1
Sony
KV32XBR45
AA-1
Unit has an open R789 a 18 meg 1/2 watt resistor for the Horizontal KV32XBR45 convergence is way off in the static convergence. The tech will have to make a resistor out of 3, horizontal direction 6.2 meg resistors. Suggest tech look for R789 and see if it is open It is on the on "C" board. It The value is around 10 meg. There are two different chassis and CRTs used for this model. If they have the older KV32XBR45 Unit has convergence of all chassis type that requires H stat convergence (CRT board has H vertical lines are displace horizontally. Tech CONVERGENCE stat control) they need to order the older CRT as per the manual. replaced the CRT without authorization. If newer type (No H stat) then the new CRT as per Service Manual This did not solve the symptom supplement -1 is needed. CRT 8-733-743-05 The H Stat is done using the Yoke ring magnets. I have attached the two Service Manual supplements, and the SB325R1. Suggest tech look for R789 and see if it is open It is on the on "C" board. It The value is around 10 meg. There are two different chassis and CRTs used for this model. If they have the older chassis type that requires H stat convergence (CRT board has H KV32XBR45 Unit has sever Horizontal static convergence error. Tech replaced the stat control) I have attached the two Service Manual supplements, CONVERGENCE CRT without authorization. This did not and the SB325R1. However none of them have show this resistor. We were able to install a resistor in this unit that was a two 10 solve the symptom. megs in series. Trimming the value by adding another 10 meg in parallel with one of the other 10 megs. we were able to converge the set. Original part was not available. R789 open H-state not operational. What I'm finding is a resistor that appears to be open on this "C" board It is R789 The value Unit has mis-convergence of red and blue cannot be read nor is it listed in the ESI software parts list. Trying vertical lines. They are displace another value from 10 to 20 megohms. This resistor is in the CONVERGENCE horizontally. Tech replaced the CRT ground return of the H-stat resistor that is installed in the CRT. without correcting the symptom. Tech needs to try different values to try and make this set converge horizontally. This TV converged with a 10 megohm resistor. Suggest tech look for R789 and see if it is open It is on the on "C" board. The value is around 10 meg. There are two different chassis and CRTs used for this model. If they have the older chassis type that requires H stat convergence (CRT board has H stat control) they need to order the older CRT as per the manual. If newer type (No H stat) then the new CRT as per Service Manual supplement -1 is needed. CRT 8-733-743-05 The H Stat is done using the Yoke ring magnets. Unit has over 6 permaloy magnetic on the CRT bell in the area of the bottom of the yoke. This is not a good sign. It is also a rebuilt CRT. We are not going to place more Permaloy strips on this CRT. It needs replacement.
Sony
KV32XBR45
AA-1
Sony
KV32XBR45
AA-1
Unit has nis-convergence of red & blue vertical lines which are displaced CONVERGENCE horizontally. Tech replaced the CRT. This did not solve the problem.
Sony
KV27V22
AA-2
KV27V22 serial # 8051260 will not CONVERGENCE converge the bottom red green or blue horizontal lines
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Sony TSS Logs
Sony
KV27V40
BA4
Sony
KV35S40
AP
Sony
KV32XBR76
FN
Sony
KV32TS36
AA-1
Sony
KV32TS46
AA-1
Sony
KV27V65
AA-2
KV27V40 Unit has vertically skewed convergence. Center vertical convergence is Skewed with red skewed counter CONVERGENCE Problem is caused by a defective CRT. clockwise by 0.5 inches and blue skewed clockwise by nearly the .05 inched. Green lines are straight. This phenomena is normal and is caused by the IK pulses that are produced at the instant of turn on. Even thought the cathodes are Unit has preglow at the instant the not completely warmed up there will be a slight amount of beam television is turned on. The preglow shows CRT current produced by just the IK pulses. Since these pulses are at in the lower left and right hand corner and the top portion of the tube or on the curved funnel portion of the stays until the raster appears. CRT this symptom is common and is not considered a defect in the CRT. This set was an older unit has seen many hours of use. The tech was instructed to ESR all electrolytics in the power supply. After Unit cycling on and off as soon as the set is Cycling on an off ESR'ing all the electrolytics we found that C662 in power supply plugged in. was open. Its ESR was infinite. Value was supposed to be 220mffd@ 35 vdc. I had the tech check the Secondary of the T605 for shorts. Also check to see if the horizontal output is shorted. Did not find any shorts in the horizontal but the driver transformer had small ring KV32TS36 unit is dead. Tech replaced fractures around the secondary pins. Resoldered these pins and Q601, Q602, & R607. Then put full power Dead started the set up again with a 40 watt light bulb in place of R607. to the set and blew out all the same The set operated with reduced secondary voltage and cycled on components again. and off at about a 3 second rate. During the cycling the collector signal at Q501(C) was normal. Replaced the light bulb with a new R697 and the set ran fine. Tech needs to check the condition or RY602. RY602 is the Unit was dead. has shorted horizontal switching relay that turn on and off the set. The relay is "HOT" output and shorted Q601, & Q602 switched. In other words one side of the relay is connected to components in power supply replaced. power oscillator output that runs nearly 350 vac Peak to Peak at Dead After replacement unit will turn on but still 90Khz. Once the relay is closed this energy is placed across the has no secondary voltage output of power power output transformer and provides the drive necessary to transformer. All relays click but no high produce the B+.Measuring the input voltage of the relay to "HOT' voltage. Has sound. ground found it to be 150 volts DC mode. But on the other side of relay we has 3 volts DC mode. Unit has defective RY602 relay. Unit had a blown IC601 and R607. Tech had failed to check the condition of the Power supply output for the 135 vdc source.. It was Unit is Dead Tech replaced the IC601 and discovered there was a 1.2 ohm short to ground caused by a R607 and the Flyback, but when power shorted protect diode in the secondary of the power supply. I Dead was reapplied the set destroyed the power cannot stress enough the tech needs to check all loads on the supply again. secondary of the power supply for shorts, and use a variac to start up all power supplies. All parts changed earlier are destroyed and need to be replaced again.
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Sony TSS Logs
Sony
KV32S40
AA-2
Dead
Sony
KV32S40
AA-2
Dead
Sony
KV32V40
AA-2
Dead
Sony
KV32XBR48
AA-2
Dead
Sony
KV32XBR48
AA-2
Dead
Sony
KV35S26
AA-2
Dead
I never recommend that after replacing these components in the power supply that the set have full line voltage applied to it. The odds are very high the new components will be instantly. Suggested the tech use a variac to do these tests. This power supply should start running at 10 vac as a line source. The current KV32S40 serial 8001469. Unit had the should never go above 100 ma during a no load test. Max 800 ma power supply IC601 shorted and open during a normal load. When running this power supply at 15 volts R607. Tech replaced these components the current was surging to over 200 MA. Checking al the loads on and it shorted out again at the instant the the secondary found no obvious short circuits. However when television is plugged in. checking the capacitors in the primary we found C610 has internal resistance of 470K, There should be no internal resistance. Replaced C610 and restored normal operation. Suggest that C609, C610, C611, and C612 be automatically replaced when this happens. This product was brought into the shop where the set was operated KV32S40 Unit will run for several days then with the CRT disconnected for approximately 100 hours it will short the horizontal output transistor continuously. It ran fine. But 6 hours after the CRT was connected and destroy the power supply IC601 the Horizontal output and power supply self destructed again. Unit has defective CRT Suggest the tech replace the CRT KV32V40 Unit was originally dead. Q502 After replacement of the components the sweep was still was replaced. Now set has a sever over excessive. When using an oscilloscope on the IC351(31) the E/W scan of horizontal sweep. Collector of Q512 pin out we found 6 volts DC, and no 60 HZ parabolic wave form. If only 2 volts Q512 was shorted. L511 is this E/W output pint was touched to ground through a 270 ohm burned and needs to be changed, along resistor the picture narrowed up to a an almost normal width. with D504 D503, D502, C511, C513, and Product had defective IC351. L511. Checking the Collector of the Horizontal output transistor the retrace period was running in excess of 20 microseconds not the traditional 11.5 microseconds. Closed inspection was found the KV32XBR48. Originally dead with shorted deflection yoke leads inside the connector were loose and the IC601 converter IC and horizontal output crimp for the wire to the horizontal winding were not making contact transistor shorted too. The horizontal drive to the terminal inside the connector. Cleaning the terminal and looked odd, but this was not the problem. prepping the connection was necessary because there was evidence they were burned by the voltage drop in the poor connection . Checking the Collector of the Horizontal output transistor the retrace period was running in excess of 20 microseconds not the Originally dead with shorted IC601 traditional 11.5 microseconds. Closer inspection found the converter IC and horizontal output deflection yoke leads inside the connector were loose and the transistor shorted too. crimp for the wire to the horizontal winding were not making contact to the terminal inside the connector. KV35S36 serial 9027801 Unit goes dead after 10 minutes after the power supply was After running the television for over 1 hour with the CRT repaired.Q601 & Q602 were not running disconnected It was determined the power supply, deflection, and hot they just shorted. They were replace 4 horizontal deflection were all working. It was further decided to times. Each time the transistors lasted 10 change the CRT needs to be replaced. CRT fixed the unit. minutes and in 1 case 1 week.
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Sony TSS Logs
Sony
KV36FV1
AA-2
Dead
KV36FV1 serial 9029271. Unit is dead. After talking to customer they explained that they had a power surge caused by a car hitting a power pole.
The set was completely dead. VDR602 was noticeably burned up. Cutting this device our of the circuit found that it was open. However the device is connected in the circuit like a metal oxide varistor. It should measure open since it is in parallel with the A.C. Line. It was discovered that no other shorted components could be found in the primer of the power supply. Main line fuse WAS NOT BLOWN! Checking the raw AC voltage on the AC Line filters T601, and T602 find that we have no AC voltage on the output of T602 but present on the input side. Isolating the open coil and removing the defective VDR602 allows the set to turn on and operate correctly. Tech will need to replace T602 and VDR602.
Sony
KV27XBR15
ANU-1
Dead
Sony
KV27S40
BA4
Dead
Sony
KV27S45
BA4
Dead
Sony
KV27V40
BA4
Dead
Sony KV27XBR15 ANU-1 chassis Unit is Horizontal output is also shorted. ?This unit requires a modification dead. Unit had all 3 regulators loose. All to the horizontal output section KIT # T-998-566-41. This Kit had ring fractures. Once resoldered the set consists of a 2SC4927 and a .68 ohm resistor that must be used in still did not turn on because of a short to the emitter of the horizontal output transistor. ground on the 135 vdc line. KV27S40 Unit is dead. Will not turn on LED Checking the secondaries of T603 we could not find any short flashed 5 time . The set will latch the relay circuits on the se The needs to connect a variac up to the television but will not develop secondary voltages and supply 18 volt AC. A jumper need to be installed across the from the main power supply contact connections of RY602 in the A" board. VDR5050 is metal oxide varistor. It is in parallel with the AC line voltage . It appears the customer had a AC line source that blew the MOV, then the fuse. Checking Q5001 we do not find a short KV27S45 VDR5050 Unit dead. Inspection between Drain and Source. Suggest the tech remove the MOV and of the chassis discovered there is no stand replace the fuse and try operating the set. It operates fine. Suggest by voltage. Inspecting the "E" board found the tech replace the MOV, but disable the television until the MOV that the fuse F5050 was open and the can be replaced, since the MOV is a Protection device in the event VDR5050 had a chunk of material blown the Power surge returns. NOTE: It was discovered the VCR was off of it. also dead which not was not evident at the time of the call. This confirms the power surge theory. VDR5050 = 1-801-074-41 F5050 =1-576-193-11 6.3 amp @ 125vac. There are apparently no shorts circuits on the secondary of the main switcher supply. However when trying to discover why the IC601 was shorted we could not find any evidence of line surges that might have shorted the VDR601 or open R618. But when KV27V40 8112963 Unit is dead. Only the checking the secondary of the Flyback transformer at the outputs of Timer LED flashes. D560 and D561 we found nearly 4.6 ohms from the +13 to the -13 volt source. Floating IC541(2&4) removed the shorted condition. Unit has a shorted vertical output IC541 shorted from the +13 volt to the -13 volt if IC541(2 &4)
file:///C|/Documents%20and%20Settings/Admin/Plocha/Sony%20TSS%20Logs.htm (9 of 36) [26. 1. 2004 0:28:02]
Sony TSS Logs
Sony
KV27V40
BA4
Dead
Unit is dead. Only the Timer LED flashes.
There are apparently no shorts circuits on the secondary of the main switcher supply. However when trying to discover why the IC601 was shorted we could not find any evidence of line surges that might have shorted the VDR601 or open R618. But when checking the secondary of the Flyback transformer at the outputs of D560 and D561 we found nearly 4.6 ohms from the +13 to the -13 volt source. Floating IC541(2&4) removed the shorted condition. Unit has a shorted vertical output IC541 shorted from the +13 volt to the -13 volt if IC541(2 &4)
SON
KV32FS13
BA5
DEAD
SON
KV32FS13
BA5
DEAD
SON
KV32FS13
BA5
DEAD
Q502(C ) pulse was corrupt. More testing in the we found the Damper diodes D501 & D504 were shorted Main Power supply will not along with the pin modulator transistor Q504. Parts produce secondary voltages. necessary to fix this unit was; When powered up the set will turn D501 & D504 pn# 8-719-545-80 on but the will "Chirp". Q504 pn# 8-729-053-87 Q502= 8-729-046-07. Checking around the flyback transformer and horizontal output with an oscilloscope we found the horizontal pulse was corrupt. This was measured on Main Power supply will not Q502( C) Further checking we found the Damper produce secondary voltages. diodes D501 & D504 were shorted. This condition When powered up the set will turn also directed us toward the pin modulator transistor on but the will "Chirp". Q504 which we found shorted. Parts necessary to fix this unit was D501&D504 pn# 8-719-545-80 and Q504 pn# 8-729-053-87. Checking around the flyback transformer and horizontal output with an oscilloscope we found the horizontal pulse was corrupt. This was measured on Main Power supply will not Q502( C) Further checking we found the Damper produce secondary voltages. diodes D501 & D504 were shorted. This condition When powered up the set will turn also directed us toward the pin modulator transistor on but the will "Chirp". Q504 which we found shorted. Parts necessary to fix this unit was D501&D504 pn# 8-719-545-80 and Q504 pn# 8-729-053-87.
file:///C|/Documents%20and%20Settings/Admin/Plocha/Sony%20TSS%20Logs.htm (10 of 36) [26. 1. 2004 0:28:02]
Sony TSS Logs
Sony
KV24FV300
BA6
DEAD
Sony
KV24FV300
BA6
Dead
SONY
KV32XBR36
FN
Dead
Sony
KV32XBR76
FN
Dead
Sony
KV32XBR96
FN
Dead
Sony
KV36FV1
AA-2
FOCUS
This TV RAN and for approximately ten hours and then shut down. The standby supply is running because the relay RY600 All conmponents Q600, Q601 are not shorted. B+ at Q600(D) was will latch, But RY501 will not latch. LED in 345 vdc. Checking R640 a 1K resistor found it to be open. It was front is blinking 4 times then stoppsWhen suggested that R640 and IC600 be replaced. IC600 Pn# is 8-759measuring the presence of B+ at IC600(18) 670-30. Replacing the devices corrected the problem. referenced to hot ground, it was missing. Main supply was not oscillating. Here is the problem; An arc occurs from the CRT dag to the heatsink of Q600 because it sits so close to the Dag. The heatsink is isolated from ground so the arc has no where to go but to the closest point to the heatsink. This point is IC600(18). The arc kills IC600 and subsequently burns up R640, a 1K at 1/2 watt resistor. IC600 and R640 blown. Replace the defective components then add a 100K resistor from the heatsink to ground. Directions are located at this link. http://wa6ati.home.mindspring.com/BA6-IC600Countermeasure.pdf . Unit will not power on. Monitoring the 17 One of the primary filters on the 17 vdc standby supply C662 a vdc stand by supply we find the voltage 220mfd @ 35vdc was open. running at 4.6 volts. The problem is caused by D1409 on the A Board shorting. Problem caused by an intermittent B+ regulator on the G board, IC651, 1809-524-11. Replacement resolves problem. We have seen a number of these units lately with D1409 shorted. Often it is simply Unit will not turn on. No high voltage. Measuring the condition, D1409 is shorted. ring cracks on IC651 causing the problem. This unit did have a loose solder connection on IC651(1) but it did not drop the voltage down enough across D1409. The voltage was always 36.6 volts across a 36 volt Zener diode. R623 and VDR 602 burned up. Tech needs 8.2 ohm resistor to KV32XBR96. Unit is dead and has no replace. Tech does not have 8.2 ohm in his stock. However he can vertical sweep. make an 8.2 ohm by paralleling a 10 and 47 ohm resistor. This will create a 8.24 ohm resistor. C531 vented is Connected to R881. This is caused by the 10 megabit throughput limit of the DSS video compression format MPEG3. In order for the compression to work correctly the Digitization process only updates the data that is KV36FV1 Customer is running the changing. Background data is not updated as regularly as the television on a DSS satellite system. foreground data. Hence when everything must get updated. But the Customer claims the set looses focus in the MAX Data throughput is finite. the entire video waveform will not be picture when there is a lot of detailed accurately represented, instead the smaller detailed portions of the movement. picture will begin to have larger pixels so not to exceed the Max Data. This is why to the eye the set appears to loose resolution or picture detail. This is normal.
file:///C|/Documents%20and%20Settings/Admin/Plocha/Sony%20TSS%20Logs.htm (11 of 36) [26. 1. 2004 0:28:03]
Sony TSS Logs
Sony
KV36FV1
AA-2
focus
KV36FV1 serial 9046442 Unit has poor focus on left and right side of picture
The set has a dynamic focus error. Tech needs to see if the Dynamic focus circuitry is running correctly. Also before any hardware is tested the parameters of HAMP and DCSF should be adjusted to see if the dynamic focus is effected. When adjusting these parameters the values get the best focus when each is mixed out to 60. The focus becomes poor 2 inches from the left side of the screen and 5 inches from the right side of the screen.
Sony
KV32FV1
AA-2H
focus
Sony
KV36XBR200
AA-2H
FOCUS
SONY
KV32XBR45
AA-1
GEOMETRY
Sony
KV27S10
AA-2
GEOMETRY
Sony
KV27V65
AA-2
GEOMETRY
Sony
KV32S45
AA-2
GEOMETRY
Sony
KV36FV1
AA-2
GEOMETRY
Since this set has the super flat CRT. It incorporates a dynamic focus circuit. In other words the focus voltage varies as the beam KV32FV1 Unit has poor focus on the left travels from left to right. Measuring the Horizontal parabolic wave and right side of screen but OK in the form up to the input of the primary of the DF transformer, we found center. If the focus control is varied through the signal to be normal. We were unable to measure the voltages its range the sides will become in focus further because they were potentially focus voltage potential. The with the center out of focus. horizontal parabolic wave form enters the Flyback at the secondary of the DF transformer. Unit had defective flyback transformer. KV36XBR200 serial 9023068Out of focus CRT...Attempting to move the focus control does not cause the on the extreme horizontal edges of the area on the outside of the CRT to change focus. Unit may have screen. The last 3 inches have a noticeable Bad CRT. focus error Unit is trying to constantly adjust the When monitoring the E/W Pin output of the M board the signal was vertical height and horizontal size very instable. It was decided to replace IC351 the Jungle IC. This intermittently. corrected the trouble. KV27S10 serial 723009 Unit has symptom every time the set looses power the geometry memory is lost VPOS, VSIZ, Tech needs to replace the EPROM....... I002 corrected the HSIZ. PAMP drop at least 10 points each. problem When resetting these values and writing them to memory the they will be erased as soon as power is removed KV27V65 serial 8027393 Customer This television is operating within specifications. The geometry complaint is a slight geometry error or tilt in errors should not deviate more than 1/8 of an inch across the the lower right hand corner of the screen. It length of the Horizontal line. Horizontal tilt can be no more than 1/8 causes a symptom of horizontal lines that of an inch. This television beats this measurements. There is are not perfectly straight. In this case the nothing I can recommend to the tech to do to improve on the lines are elevated by at width of 2 geometry of this receiver. horizontal lines. KV32S45 serial 8102913 picture is rotated clockwise by 1/4 inch. Tech claims this tube Tech needs to break the bonding of the yoke ant reposition the does not have a pix tilt circuit or rotation on yoke. the CRT bell KV36FV1 serial 9032273. Unit has a symptom of "Shoulder roll off". In other words horizontal lines are bent down on the Gave tech bulletin 387R2 relating to the shoulder roll off far left and right side of the screen. Tech needs yoke modification for the yoke upgrade.
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Sony TSS Logs
Sony
KV32XBR200
AA-2H
GEOMETRY
Sony
KV32XBR200
AA-2H
GEOMETRY
Sony
KV32XBR200
AA-2H
GEOMETRY
Sony
KV32XBR200
AA-2H
GEOMETRY
Sony
KV36XBR200
AA-2H
GEOMETRY
Sony
KV36XBR200
AA-2H
GEOMETRY
Sony
KV36XBR250
AA-2W
GEOMETRY
Sony
KV32V26
AA-2
green retrace lines
KV32XBR200 serial # 9008075 .Unit has just had the new CRT with the attached Bulletin 387 did not mention a plate which was in the old deflection yoke replaced today to correct the Shoulder yoke. The missing THL plate needed to be removed from the old Roll off symptom as described in Bulletin yoke and placed in the same slot in the new yoke . After following 387. However the new tube and yoke did the new bulletin 387R1 we were able converge the set. not solve the vertical pincushion symptom KV32XBR200 serial # 9018039 .Unit has We have changed several yokes so far as of 4-2-99 WITH LIMITED "Shoulder Roll Off" symptom as described SUCCESS. Performing a complete setup of purity, convergence in Bulletin 387. Tech will be ordering new and geometry setting corrects most of the geometry errors. yoke and needs the part number However this set will not be perfect. KV32XBR200 Unit has just had the new Bulletin 387 did not mention a THL plate which needed to be CRT with the attached yoke replaced today adjusted was in the old deflection yoke. After following the new to correct the Shoulder Roll off symptom as bulletin 387R1 we were able converge the set. Also the new tube described in Bulletin 387. However the new needed 3 magnetic on the bell of the tube to correct a purity error tube and yoke did not get installed. Instead and converge the lower right hand corner. we are going to contact Sony KV32XBR200 Unit has just had the new CRT with the attached yoke replaced today to correct the Shoulder Roll off symptom as See bulletin #387R1 described in Bulletin 387R2. However the new tube and yoke did not solve the vertical pincushion symptom KV36XBR200 Picture is tilted. There is Use part number out of bulletin 379 for the pix tilt correction coil. insufficient range in the tilt adjustment KV36XBR200. Serial 9016768. " Unit has pincushion error o the top of screen. Area around the extreme edges of the fields do Bulletin 387 did not mention a THL plate which needed to be not have straight lines. Horizontal lines adjusted was in the old deflection yoke. After following the new have a shoulder roll off. Tech ordered bulletin 387R1 we were able converge the set. Also the new tube Yoke specific to bulletin # 387 , but needed 3 magnetic on the bell of the tube to correct a purity error received the complete CRT. I held off and converge the lower right hand corner. replacing the CRT due to three of these have been changed so far with no changes in the symptom KV36XBR250 This television has as symptom on the screen where a small area has a non linear horizontal area that Tech needs to change the value of C553 from .33 @ 200 vdc to .47 causes the image to expand when the @ 250 vdc part number 1-117-667-71. This improve the linearity in image passes through this area. The area that are of the screen about 1/2 inch wide and effect the entire frame of the picture. It can be seen if characters are scrolling through the screen. The CRT # is A80JYV51X . The cathode voltages at red and blue Sony KV32V26 serial 8012582 Goes to green retrace lines and then shuts down. cathodes are 156 but the green cathode is 22. When the socket is When it comes back on again the unit will disconnected the green cathode supply jumps to 153 vdc. The CRT is defective. be in the video input mode.
file:///C|/Documents%20and%20Settings/Admin/Plocha/Sony%20TSS%20Logs.htm (13 of 36) [26. 1. 2004 0:28:03]
Sony TSS Logs
SONY
KV27S25
AA-2
HIGH VOLTAGE
Sony
KV32S40
AA-2
horizontal
Sony
KV35V36
AA-2
horizontal
Sony
KV36FV1
AA-2
horizontal
Sony
KV32XBR50
LN1
horizontal
Sony
KV27S20
AA-2
horizontal lines
Sony
KV32S40
AA-2
horizontal sweep
Sony
KV35V35
AA-2
HORIZONTAL SWEEP
There does not seem to be any horizontal drive to the Horizontal drive transistor. Defeating the Horizontal output by removing the Unit has no high voltage. LED in front is collector connection still will not allow Horizontal drive to appear at flashing on and off after power up. IC351(37). This pin is sitting at nearly 8.5 volts, not the 3 volts it is supposed to be. Also IC351(38) the HOFF/AFCPIN is at 3.3 volts which is normal. Unit has a bad IC351 CXA2025AS Measuring the collector of Q512 tech finds the voltage running in excess of -7 volts. The voltage on this transistor in inconsistent with Unit has severe over scan of horizontal the symptom on the screen of a narrow raster that is hourglass sweep. Tech replaced Q512 Shorted and shaped. L511 and Q512 are burning up. Suggest the tech replace Q511 open all elements. the following additional components D502, D503, D504, C511, and C513. When going into the tech set up parameters and adjusting the HSIZ value the sweep will change to full sweep. Monitoring the voltage at the Collector of @Q512 the voltage will vary from 27 volts HSIZ set Unit has a insufficient horizontal sweep. The sweep is reduced by 10 to 15% on the to 22. When HSIZ is set to 48 Q512(C) will drop to 16 volts. The set will have full sweep but it has a slight foldover condition on the right left side and 2 ~ 5% on the right. side of picture. It is recommended the tech replace the retrace capacitors C511, & C513 and the Yokes" capacitors C518, & C515. Unit has a severe over scan condition for Tech needs to check on L511, Q512, C513, C511, D502 & D504. horizontal sweep. Tech did not measure One or more of these are shorted. any voltages in the pin amp circuit. KV32XBR50 Unit has sever horizontal IT was discovered that the Q505 was shorting collector to emitter. overscan. Measuring Q505(C ) the voltage Also R571 was also showing signs of overheating. It was was near "0" volts. Tech changed Q501 suggested that L501 & R571 be replace with a new Q505. The set but the transistor shorted in less than 5 now runs correctly. seconds. Sony KV27S20. Black banding across the Gave tech modification on the KV27S20 to replace C1267 from a screen. Symptom does not appear when .047 to a .47 tantalum capacitor. playing a tape. Measuring the collector of Q512 tech finds the voltage running in excess of -7 volts. The voltage on this transistor in inconsistent with KV32S40 ser 8053998 Unit has sever over the symptom on the screen of a narrow raster that is hourglass scan of horizontal sweep. Tech replaced shaped. L511 and Q512 are burning up. Suggest the tech replace Q512 Shorted and Q511 open all elements. the following additional components D502, D503, D504, C511, and C513. When going into the tech set up parameters and adjusting the HSIZ value the sweep will change to full sweep. Monitoring the voltage at the Collector of @Q512 the voltage will vary from 27 volts HSIZ set KV35V36 Product has a insufficient to 22. When HSIZ is set to 48 Q512(C) will drop to 16 volts. The set horizontal sweep. The sweep is reduced by will have full sweep but it has a slight foldover condition on the right 10 to 15% on the left side and 2 ~ 5% on side of picture. It is recommended the tech replace the retrace the right. capacitors C511, & C513 and the Yokes" capacitors C518, & C515. Tech replaced all of the capacitors and the symptom was corrected.
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Sony TSS Logs
Sony
KV35V75
AA-2
Sony
KV36FV1
AA-2
Unit has shorted L511 and Q512. Tech HORIZONTAL replaced these items and they burn out SWEEP again KV36FV1 serial 9023663 Unit has a sever HORIZONTAL over scan condition for horizontal sweep. SWEEP Tech did not measure any voltages in the pin amp circuit
Tech needs to replace D503,D502, D504 and C511, C512 the retrace capacitor along wit the other components. Tech needs to check on L511, Q512, C513, C511, D502 & D504. One or more of these are shorted.
Sony
KV32XBR96
FN
Sony
KV20EXR20
Sony
KV27V22
AA-2
Sony Sony
KV36FV75 KV32XBR10
AA-2 ANU-1
Sony
KV27S15
AA-2
Sony
KV32XBR48
AA-2
Sony
KV32TW77
AA-1
I had tech look at Q501(E) the voltage should be about 16 volts. HORIZONTAL KV32XBR95S Unit has an extremely wide This is the pin modulator input for pincushion correction. In this TV SWEEP picture. it was 2 volts. A resistance check finds the ohm value to be under 10 ohms. Tech needs to check D511, and Q505 HORIZONTAL KV20EXR20 Insufficient horizontal sweep On the G" board all the B+ on the supply. IC503 is defective SWEEP IC603 is the wrong IC for this chassis. SEC135. KV27V25 Unit has intermittent snow in the picture zThe tuner pn# 8-598-340-20 was replaced. Now the set has a symptom I instructed the tech to enter the tech mode and set the ID where the remote control causes the set to codes...ID0=25, ID1=23, ID2=47, ID3=0, ID4=27,ID5=135, ID6=1, enter the video input mode when the intermittent snow ID7=0 . Write these in memory, then press "8" "Enter" to initialize. channel is selected. Also the set will enter This corrected the problem. the video input mode if the and another brand of remote that operates a stereo receiver will put the set into the video input mode. KV36FV75. Unit has no audio. But also has ID codes are 0=25, 1=55, 2=47 3= 0 , 4= 155, 5 =143, 6 =6, 7=0 NO AUDIO no OSD stating "Main" or "Stereo" Main which is correct. Initializing the EEPOM did not correct the trouble. picture is fine. Tech will be returning with a Manual Product has a defective MTS audio controller part # 8-741-592-2 (8no audio KV32XBR10 Unit has no audio 741-100-56) original number SBX1592-02 corrected the symptom Scoping the first place where the chroma signal can be readily KV27S15 Unit has no Chroma. Black & available is on the PIP module. They are marked "C IN" & "C OUT" white is OK. Also no Chorma while using on connector CN501(1 & 5). We have chroma going into the PIP NO CHROMA the PIP. Sound and On Screen Display OK. board but nothing coming out. Jumping these pins together with a 1 Initializing EPROM does not change the mfd capacitor caused the color to return, as long as the capacitor effect. was in place. Unit has bad PIP module. no chroma PIP Sony KV32XBR48. No chroma in PIP X3304 0n PX board not soldered (PIP) Sony AA-1 chassis. Unit no high voltage or sound. RY602 latched at turn on. Tech replaced the flyback and Q601, Q602, Inspected the Power oscillator and discovered that it was running VDR601, VDR602, VDR603 & R607. After and producing 167 volts DC at the input side of RY602, but a <13 No high voltage theses components were replaced the unit volts on the low side. Jumping RY602 restored High voltage. Unit still did not produce secondary B+. Only 3 had a bad RY602 relay in the power supply. volts on the collector of the Horizontal output.
file:///C|/Documents%20and%20Settings/Admin/Plocha/Sony%20TSS%20Logs.htm (15 of 36) [26. 1. 2004 0:28:03]
Sony TSS Logs
SONY
KV27S25
AA-2
NO HIGH VOLTAGE
Sony
KV32XBR200
AA-2H
NO HIGH VOLTAGE
KV27S25 serial 811908. Unit has no High voltage. LED in front is flashing on and off after power up. There does not seem to be any horizontal drive to the Horizontal drive transistor. Defeating the Horizontal output Looks like the tech has a bad IC351 CXA2025AS. A second Jungle by removing the collector connection still IC corrected the problem. will not allow Horizontal drive to appear at IC351(37). This pin is sitting at nearly 8.5 volts, not the 3 volts it is supposed to be. Also IC351(38) the HOFF/AFCPIN is at 3.3 volts which is normal Unit has b+ to horizontal output but no horizontal drive. If the Horizontal output is removed the set will produce the necessary KV32XBR200 9015636 Unit will click on drive signals. Collector of H. driver Q501(C) measures 85 with then it will turn off again. Does not get high Horizontal output removed. Unit appears to have a shorted Flyback voltage. or a problem in the horizontal output section that caused the OCP circuit to attack. Product had a defective Flyback transformer. KV24FV10 unit will not turn on. No High voltage. LED in front blinks 4 times indicating there is a vertical deflection has stopped. Both relays will latch but RY600 will unlatch after 15 seconds RY600 is the degaussing relay. The 15 second delay is normal. Since the unit never develops high voltage it would be obvious to all that vertical deflection will not occur. However the flashing of the LED "4" times is a bit misleading. The turn-on relay (RY602) latches but we are not able to achieve secondary B+. Closer inspection discovers that we are not getting primary voltages either. Jumping the relay (RY602) achieves High voltage and all functions work normally. Unit has a defective RY602. part # 1-755-266-11 Checking all the "MUST HAVES" I found that all B+'s were normal on the vertiical output IC. But checking the Data and clock I found that the pulses, after the power is pressed the data and clock pulsed 3 time during a the 3 second period wait affter power button was pushed. After the 3 seconds there was a were a series of pulses with a duration of only 120 microseconds wide remaining for 3 more seconds then disappeared. The pulses were 5 volt peak to peak and looked OK. Artificially I was able to "tickle" IC451(1 & 7) with my Fluke 77 meter in the diode check mode. This tests the ability of the IC to deflect the beam up or down to check the intergrity of IC451. I was able to get the beam to move up and down with this test. We had the same type of Data and clock going to all peripherials. I unplugged the "P" board and started the set again. The Data and Clock now changed dramatically. Instead of a 120 Microsecond pulse train, it increased to was 1000 microseconds. Unit has defective "P" board. This is a PIP module.
Sony
KV24FV10
BA4
NO HIGH VOLTAGE
Sony
KV27S45
BA4
NO HIGH VOLTAGE
KV27S45 serial 8015302 Unit will turn on but will have high voltage. It will shut down with the LED in front flashing 5 times indicating there is no vertical sweep. Jumping RY602 I was able to keep the set on and test the power supply and IC451 integrity.
file:///C|/Documents%20and%20Settings/Admin/Plocha/Sony%20TSS%20Logs.htm (16 of 36) [26. 1. 2004 0:28:03]
Sony TSS Logs
Sony
KV32XBR76
FN
Sony
KV32S25
AA-2
The problem is caused by D1409 on the A Board shorting. Problem caused by an intermittent B+ regulator on the G board, IC651, 1809-524-11. Replacement resolves problem. We have seen a KV32XBR76 Unit will not turn on No high number of these units lately with D1409 shorted. Often it is simply no high voltage voltage. Measuring the condition of the ring cracks on IC651 causing the problem. This unit did have a D1409 is shorted. loose solder connection on IC651(1) but it did not drop the voltage down enough across D1409. The voltage was always 36.6 volts across a 36 volt Zener diode. When monitoring the Horizontal output collector we found the 140 KV32S25 Unit will not develop high voltage. dropped slightly at turn on. But the Horizontal driver Q501(C) When the set is turned on no high voltage dropped to 85 and back up to 140. I had the tech to remove the appears. The set has sound and has a horizontal output transistor and try starting up the set again. After No Highvoltage flashing light on the front indicating the set power up measure the Q501(C) horizontal driver transistor. It is still in a stand by mode waiting for IK should be about 85 volts and stayed. This told us we were looking pulse feed back acknowledgement from the at a shutdown symptom. Checking all secondaries we found jungle IC nothing shorted. Replaced flyback which corrected trouble. The horizontal driver has tremendous amount of ringing on it. Does not change if we remove horizontal output transistor. The transistor has drive has 7 distinct pulses on the base that go above and below the cut off point of the transistor. These seven pulses are 1 KV32V25 serial # 7014651. Unit has no No Highvoltage high voltage. microsecond in duration and are grouped in clusters after where the horizontal drive pulses are supposed to be. If allowed to operate for more than a minute the horizontal driver transistor Q502 will short C to E. The product has a bad jungle IC301 Sony KV32XBR50 . No high voltage,. Has B+ OK on Horizontal output but not OK on Horizontal Driver. No B+ sound. Tech claims all B+'s are normal on driver. Tech found small connection loose on primary No Highvoltage connection of driver transformer. Resoldered and restored normal from power supply however no high operation. voltage. When tracing the video signal from the front input connector we find good video on the connector but less than an inch away from the KV32V25 Unit has no video when using the no video connector is a coupling capacitor C2233. Apparently the trace was front input jacks. All other inputs are O.K. torn after the video input jack entered the board. Placing a hard jumper wire from the Jack to the C2233(-) corrected the fault. Sony KV32XBR50 This customer has a Goldstar 8mm/VHS dual deck VCR located under this television on the built in shelf. When customer uses the 8mm deck the playback of the tape has corrupted audio, and poor tracking performance when played back on this television The design of the 8mm format is significantly different from that of the VHS. The 8MM format does not have any stationary heads and completely relies on the signals from the rotary video heads on drum. 4 ATF (Auto Tracking Fix) carriers are recorded on to the tape. Apparently the shielding in the 8 mm VCR, this close proximity to the TV, and the lack of shielding in the Sony TV caused the corruption of the 4 ATF signals. Placing the VCR on the bottom shelf of the TV cabinet corrected the symptom.
Sony
KV32V25
AA-2
Sony
KV32XBR50
ANU-1
Sony
KV32V25
AA-2
Sony
KV32XBR250
AA-1
Noise Video
file:///C|/Documents%20and%20Settings/Admin/Plocha/Sony%20TSS%20Logs.htm (17 of 36) [26. 1. 2004 0:28:03]
Sony TSS Logs
Sony
KV36FS12
AA-2
NoiseY video
Sony
KV27V42
BA4
OSD
Sony
KV27S22
AA-2
Picture interference
Checking the video at the input of the comb filter IC3504(2) on the rear I/O circuit board. The video is perfect. However the Luminance out IC3504(9)is broken into pseudo square waves that are random This television had sever noise resembling in size and shapes. This indicated the Combfilter was not working. black & white random lines of varying Further checking discovered the FSC IC3504(37), which is a lengths. No discernable picture. Noise is in 3.58mhz carrier was reduced to a 60hx pulses. At CN271(15) we the tuner and video and modes. found the FSC signal normal. Problem was an open trace between the connector CN274(15) and C3578 located inside the combfilter shield located at coordinates C2 on the UY board. I asked the tech to enter the tech menu and change the setting in the VSS parameter from "0" to "1" Also change CDMD from "0" to "3" . This relates to the bulletin TV420. However this did not correct the symptom. I had the tech scrutinize the picture very closely and he discovered the image begins to have a slight sync KV27V42 When playing the DVD player stability prior to the event where the set displays the words "DVD". I through the S-video input the Letters "DVD" had the tech interrogate the composite video out of the DVD player show on the screen. and look for any anomalies in the composite video, vertical blanking interval, and horizontal sync. This unit uses sync to determine if the input port is live with valid sync. If sync is missing or corrupt the OSD will show the words that are defined by how the input label programmed. This unit may have a problem with the DVD player. Sony KV27S22. Serial 8126359 the sound is increased to a 60 to 80% level the CRT This symptom is called 'acoustical vibration." It is caused by the will exhibit an effect on the sides sound energy from the speakers coupling acoustically through the CRT frame to the Aperture grille inside the CRT. The vibration resembling a "water fall" effect. It causes the aperture grille assembly in the tube to vibrate. disappears if the audio is muted or if the audio level is dropped down to a lower Suggested customer use external speakers level.
Sony KV32XXBR45 AA1
Checking the Collector of Q503 Pin output we found the voltage running in excess of 38 volts. Q503(B) Unit has sever hour glass was less than "0" volts and had no parabolic wave on distortion. Otherwise all other it. Measuring CN116(8) we found less than .3 volts Pincushion aspects of the picture is normal. peak to peak of a vertical parabolic wave. It was When getting into the tech menu determined that IC 301(30) had no E/W correction the HSIZ or HPIN have no effect. signal. It should have been nearly 3.5 volts PP. Replacing IC301 a CXA1477AS corrected the symptom
PINCUSHION KV32XBR60 Unit has narrow picture and hourglass distortion Q505 shorted and R571 open
Sony
KV32XBR50
AA-2
file:///C|/Documents%20and%20Settings/Admin/Plocha/Sony%20TSS%20Logs.htm (18 of 36) [26. 1. 2004 0:28:03]
Sony TSS Logs
Symptoms range from: T504's core orientation has been modified from suffix -11 to -21 L505 getting very hot or becomes due to the parts construction productivity improvement. As a result defective. of this modification this part's radiated magnetic field is affecting Horizontal shifting in areas of the picture to the left and right of center. Poor horizontal L505 performance as well, saturating L505 and affecting linearity. linearity.
Sony
KV32S42
AA2D
Pincushion
Sony
KV27XBR10
FN
Sony
KV35V36
AA-2
Sony
KV32XBR76
FN
Sony
KV36FS10
AA-2
The pincushion circuit is a diode modulator type. The source voltage of Q505(C) is developed at the junction of C519-C522 as voltage divider of main B+. This division ratio is modulated by a vertical parabola at Q505(B). We have had L501 and R571 are open & Q505 is shorted. I have seen 8 units with these parts bad. KV25XBR10. Unit has excessive horizontal Only two where IC531 was also also replaced. One thing that I Pincushion pincushion have also noticed is the silk screens labels for Q505 element pins are incorrect on the board as well as the service manual silk screens. So it is very easy to get the transistor in backwards if you don't pay attention on how you remove the old one.. My suggestion is to replace the listed parts to restore normal operation. In the tech menu PAMP, CPIN, PPHA adjustments can be tweaked slightly. I asked the tech go through the ID codes for this unit and see if they were the correct value. ID3was 10 ID5 was143 & ID6was 0. KV35V36 Unit has no control over PIP These were wrong. The ID codes are supposed to be from ID0 ~ PIP channels. The PIP only displays the main ID7 = 25, 55, 47, 10, 155, 6, 0. After resetting the ID codes the set channel. It will not change on its own operated the PIP correctly but stil