TSS Logs for Sony Television Products
BRAND MODEL Chassis KEYWORD SYMPTOM KV32XBR45 convergence is way off in the horizontal direction CURE Unit has an open R789 a 18 meg 1/2 watt resistor for the Horizontal static convergence. The tech will have to make a resistor out of 3, 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 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. 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 stat control) I have attached the two Service Manual supplements, 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 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. Sony

KV32XBR45

CONVERGENCE
KV32XBR45 Unit has convergence of all vertical lines are displace horizontally. Tech replaced the CONVERGENCE CRT without authorization. This did not solve the symptom
KV32XBR45 Unit has sever Horizontal static convergence error. TV cae to us from another CONVERGENCE shop where the CRT and flyback was replaced. Customer call us for secont opinion.
BRAND MODEL Chassis KEYWORD SYMPTOM CURE 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 cannot be read nor is it listed in the ESI software Unit has mis-convergence of red and blue vertical parts list. Trying another value from 10 to 20 megohms. This CONVERGENCE lines. They are displace horizontally. Tech resistor is in the ground return of the H-stat resistor that is replaced the CRT without correcting the symptom. installed in the CRT. 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 Unit has nis-convergence of red & blue vertical the older chassis type that requires H stat convergence (CRT CONVERGENCE lines which are displaced horizontally. Tech board has H stat control) they need to order the older CRT as replaced the CRT. This did not solve the problem. per the manual. If newer type (No H stat) then the new CRT as per Service Manual supplement -1 is needed. CRT 8733-743-05 The H Stat is done using the Yoke ring magnets. Tech needs to check the condition or RY602. RY602 is the switching relay that turn on and off the set. The relay is Unit was dead. has shorted horizontal output and "HOT" switched. In other words one side of the relay is shorted Q601, & Q602 components in power connected to power oscillator output that runs nearly 350 supply replaced. After replacement unit will turn on vac Peak to Peak at 90Khz. Once the relay is closed this dead but still has no secondary voltage output of power energy is placed across the power output transformer and provides the drive necessary to produce the B+.Measuring transformer. All relays click but no high voltage. Has sound. the input voltage of the relay to "HOT' 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. When monitoring the E/W Pin output of the M board the Unit is trying to constantly adjust the vertical height GEOMETRY signal was very instable. It was decided to replace IC351 the and horizontal size intermittently. Jungle IC. This corrected the trouble.

KV32TS46

BRAND MODEL Chassis KEYWORD SYMPTOM Sony AA-1 chassis. Unit no high voltage or sound. RY602 latched at turn on. Tech replaced the flyback and Q601, Q602, VDR601, VDR602, VDR603 & R607. After theses components were replaced the unit still did not produce secondary B+. Only 3 volts on the collector of the Horizontal output. CURE

KV32V40

BRAND MODEL Chassis KEYWORD SYMPTOM CURE 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 deflection yoke leads inside the connector were loose and the crimp for the wire to the horizontal winding were not making contact to the terminal inside the connector. Cleaning the terminal and prepping the connection was necessary because there was evidence they were burned by the voltage drop in the poor connection. After running the television for over 1 hour with the CRT disconnected It was determined the power supply, deflection, and horizontal deflection were all working. It was further decided to change the CRT needs to be replaced. CRT fixed the unit.

KV32XBR48

KV32XBR48. Originally dead with shorted IC601 converter IC and horizontal output transistor shorted too. The horizontal drive looked odd, but this was not the problem.
KV35S36 serial 9027801 Unit goes dead after 10 minutes after the power supply was repaired.Q601 & Q602 were not running hot they just shorted. They were replace 4 times. Each time the transistors lasted 10 minutes and in 1 case 1 week.

KV36FV1

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 KV36FV1 serial 9029271. Unit is dead. After shorted components could be found in the primer of the talking to customer they explained that they had a power supply. Main line fuse WAS NOT BLOWN! Checking power surge caused by a car hitting a power pole. 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

BRAND MODEL Chassis KEYWORD SYMPTOM CURE Sony

horizontal lines

Sony KV27S20. Black banding across the screen. Gave tech modification on the KV27S20 to replace C1267 Symptom does not appear when playing a tape. from a.047 to a.47 tantalum capacitor.

KV35V35

KV36FV1 KV35V75
Measuring the collector of Q512 tech finds the voltage running in excess of -7 volts. The voltage on this transistor in KV32S40 ser 8053998 Unit has sever over scan of inconsistent with the symptom on the screen of a narrow horizontal sweep horizontal sweep. Tech replaced Q512 Shorted raster that is hourglass shaped. L511 and Q512 are burning and Q511 open all elements. up. Suggest the tech replace 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 KV35V36 Product has a insufficient horizontal will vary from 27 volts HSIZ set to 22. When HSIZ is set to HORIZONTAL sweep. The sweep is reduced by 10 to 15% on the 48 Q512(C) will drop to 16 volts. The set will have full sweep SWEEP left side and 2 ~ 5% on the right. but it has a slight foldover condition on the right side of picture. It is recommended the tech replace the retrace capacitors C511, & C513 and the Yokes" capacitors C518, & C515. Tech replaced all of the capacitors and the symptom KV36FV1 serial 9023663 Unit has a sever over HORIZONTAL Tech needs to check on L511, Q512, C513, C511, D502 & scan condition for horizontal sweep. Tech did not SWEEP D504. One or more of these are shorted. measure any voltages in the pin amp circuit HORIZONTAL Unit has shorted L511 and Q512. Tech replaced Tech needs to replace D503,D502, D504 and C511, C512 SWEEP these items and they burn out again the retrace capacitor along wit the other components.
BRAND MODEL Chassis KEYWORD SYMPTOM CURE I had tech short the CN1761(1, 2, 3, & 6) together. This should give a perfect black and white picture. But when this was shorted we had a black and white picture but the picture still was flashing. Since the jungle IC was already replaced it was assumed the IK pulses were OK from the jungle chip. The main concern is if the pulses are leaving the main board, and if the pulses are getting back to pin 27. This flashing condition indicates the IK feedback pulses are insufficient some where in this path. Further static check indicated a shorted zener diode D1792 in the IK buffer path on the CRT I instructed the tech to enter the tech mode and set the ID codes.ID0=25, ID1=23, ID2=47, ID3=0, ID4=27,ID5=135, ID6=1, ID7=0. Write these in memory, then press "8" "Enter" to initialize. This corrected the problem.

KV32S26

Int Raster
KV32S26 Unit has a brighter than normal picture. When G2 is lowered the picture blinks on an off. Tech replaced the flyback and jungle chip with no changes in symptom

KV36XBR200 AA-2H

KV36XBR20 0

FOCUS GEOMETRY

When looking at a blue raster at 60 IRE the blue does not have uniform brightness across the screen. The light output KV36XBR200 serial 9016329. On the far extreme is not the same level at the area of the screen where we see SCREEN left and right side of the screen the picture has a the yellow with a 60 IRE white screen. We are not able to TEMPERATURE yellow color temperature where it should be white. adjust the Blue to make it equal in brightness in all areas of the screen. This is a defective CRT. Customer does not want the set requesting a replacement. Under 30 day
BRAND MODEL Chassis KEYWORD SYMPTOM CURE Unit has insufficient vertical sweep. Also has top vertical foldover. Tech can get into the menu and AA-2H vertical effectively move the vertical height and centering but it will not eliminate the foldover condition. KV36XBR200 serial 9015396. Unit has insufficient vertical sweep. Also has top vertical foldover. Tech VERTICAL KV36XBR200 AA-2H can get into the menu and effectively move the SWEEP vertical height and centering but it will not illuminate the foldover condition 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 player puts out ID signal even when no 16X9 KV36XBR250 AA-2W 16X9 mode is available. When the Sony TV 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. KV36XBR250 This television has as symptom on the screen where a small area has a non linear horizontal area that causes the image to expand KV36XBR250 AA-2W GEOMETRY when the image passes through this area. The area about 1/2 inch wide and effect the entire frame of the picture. It can be seen if characters are scrolling through the screen. Sony KV32V26 serial 8012582 Goes to green retrace lines and then shuts down. When it comes KV32V26 AA3 green retrace lines back on again the unit will be in the video input mode. KV36XBR20 0
Tech needs to replace IC561, D561, & C565. Unit had defective Pump up capacitor. C565
Tech needs to replace IC561, D561, & C565
This auto feature can be turned off but only in the Service Mode. Change ID7 from 9 to 8. This is the No Auto V. Customer must now select modes manually on their DVD player.
Tech needs to change the value of C553 from.33 @ 200 vdc to.47 @ 250 vdc part number 1-117-667-71. This improve the linearity in that are of the screen
The CRT # is A80JYV51X. The cathode voltages at red and blue cathodes are 156 but the green cathode is 22. When the socket is disconnected the green cathode supply jumps to 153 vdc. The CRT is defective.

KV27S42

BRAND MODEL Chassis KEYWORD SYMPTOM CURE 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 KV27VUnit is dead. Only the Timer R618. But when checking the secondary of the Flyback LED flashes. 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 KV27S40 Unit is dead. Will not turn on LED Checking the secondaries of T603 we could not find any flashed 5 time. The set will latch the relay but will short circuits on the se The needs to connect a variac up to not develop secondary voltages from the main the television and supply 18 volt AC. A jumper need to be power supply installed across the contact connections of RY602 in the A" 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 between Drain and Source. Suggest the tech KV27S45 VDR5050 Unit dead. Inspection of the remove the MOV and replace the fuse and try operating the chassis discovered there is no stand by voltage. set. It operates fine. Suggest the tech replace the MOV, but Inspecting the "E" board found that the fuse F5050 disable the television until the MOV can be replaced, since was open and the VDR5050 had a chunk of the MOV is a Protection device in the event the Power surge material blown off of it. returns. NOTE: It was discovered the VCR was 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.
BRAND MODEL Chassis KEYWORD SYMPTOM CURE 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
Unit is dead. Only the Timer LED flashes.

INT RASTER

KV27FV15 Unit has Unit has a symptom when it is on Channel 4 (KNBC Los Angeles) the set will Tech needs to enter the tech menu mode and change the display a normal picture then get brighter and values of CDMD to 1 and VSS to 3. brighter then go to a no raster symptom with sound. 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 KV27S45 serial 8015302 Unit will turn on but will 120 microseconds wide remaining for 3 more seconds then have high voltage. It will shut down with the LED in disappeared. The pulses were 5 volt peak to peak and front flashing 5 times indicating there is no vertical looked OK. Artificially I was able to "tickle" IC451(1 & 7) with sweep. Jumping RY602 I was able to keep the set my Fluke 77 meter in the diode check mode. This tests the on and test the power supply and IC451 integrity. 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"

BRAND MODEL Chassis KEYWORD SYMPTOM CURE 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 Pin 27 of the combfilter did not have and 3.58 MHz signal on it. Looking in the Tech menu of the chassis found the parameter #51 fsc was set to "0" We set it to "1" and restored the chroma and luminance.
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

KV27V42

Sony KV27S40 serial 8070786 No raster. Has OSD and Sound. Timer LED not flashing. Tracing the video signal found that it was getting to the comb filter but no chroma or luminance output. KV27S42 Unit has a flashing picture on channel 2. Tech need to enter the tech menu and reset the VSS The raster will increase to a point where the raster parameter from 0 to 1 and the CDMD from 0 to 3. Channel 2 will disappear with the Front panel LED flashing 5 is broadcasting a signal in the VBI area of the video signal. times indicating an AKB failure. 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 KV27V42 When playing the DVD player through image begins to have a slight sync stability prior to the event where the set displays the words "DVD". I had the tech the S-video input the Letters "DVD" show on the interrogate the composite video out of the DVD player and screen. 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

KV32XBR76

Unit will not turn on. No high voltage. Measuring the condition, D1409 is shorted.

KV32XBR96

KV32XBR96. Unit is dead and has no vertical sweep.

HORIZONTAL SWEEP

no high voltage
KV32XBR36 Unit will not power on. Monitoring the One of the primary filters on the 17 vdc standby supply Cvdc stand by supply we find the voltage a 220mfd @ 35vdc was open. running at 4.6 volts I had tech look at Q501(E) the voltage should be about 16 volts. This is the pin modulator input for pincushion KV32XBR95S Unit has an extremely wide picture. correction. In this TV it was 2 volts. A resistance check finds the ohm value to be under 10 ohms. Tech needs to check The problem is caused by D1409 on the A Board shorting. Problem caused by an intermittent B+ regulator on the G board, IC651, 1-809-524-11. Replacement resolves problem. KV32XBR76 Unit will not turn on No high voltage. We have seen a number of these units lately with D1409 Measuring the condition of the D1409 is shorted. shorted. Often it is simply 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
BRAND MODEL Chassis KEYWORD SYMPTOM CURE This symptom is a result of a high frequency loss. The ability for the amplifiers in the B drive to turn on an off rapidly is a direct result of how high the bandwidth is. In this case the KV32XBR76. Unit has poor color registration but three outputs of the Jungle IC301(20,22,&23) had the typical color bars appear near normal. But when cross hair signal when viewed on an oscilloscope. All three outputs had pattern is put up on the screen there are no blue the same vertical spike in the center of the horizontal line on vertical line. There are red and green vertical line the oscilloscope scope. Waveform showing the cross hair pattern was the same value on all three outputs. However on and all three colors of horizontal line. connector E1(5) the signal was noticeably lower. R359 the supply resistor for Q325 had increased in value to 3.76K form 1K. Replaced R359 (surface mount resistor) corrected Unit needs to have the IF/Demodulator module removed Unit has AFT drifting as soon as the channel is from it's shielded compartment and resolder all the adjustable tuning transformers. The AFC coil/transformer has addressed. It never stops the AFT search. ring fractures around the pins that protrude through the KV32XBR36 Unit has a slow compressing and Q605 was not soldered well decompressing of the vertical sweep. KV32TSUnit has an intermittent squeal in the audio when trine to receive a stereo Tech needs to replace the Audio IC SBX1627-11 broadcast. KV32XBR50 Unit has sever horizontal overscan. IT was discovered that the Q505 was shorting collector to Measuring Q505(C ) the voltage was near "0" emitter. Also R571 was also showing signs of overheating. It volts. Tech changed Q501 but the transistor was suggested that L501 & R571 be replace with a new shorted in less than 5 seconds. Q505. The set now runs correctly. When shorting out the RGB cathodes on the CRT the set will Sony KV27TS27 LN-1 chassis predominately red get a perfect black and white picture but shorting out the picture. RGB inputs on the CRT board the set is missing green. Trouble is a defective green output transistor.

KP53S35

control panel

KP61XBR48

KP46S15
It appears like a loss of chroma phase lock of the 3.58 internal oscillator. The frequency is unstable. Recommend Sony KP53S35. Unit has poor chroma of the main tech resolder the connections on X301, C305, C310 and picture. R322 in the AFCFL circuit of the Jungle IC. This is IC301 near pins 1, 2, and 3. Unit had broken connection on R322. The power on off switch is pushed the logic low that gets sent Sony KP61XBR48 When the power button is to the CPU is not staying low. It get corrupted with a bounce pushed in the set will shut off then turn back on caused by the contact in the Power on -off switch. This fix is again to install a 2.2 mfd capacitor across the on-off switch to debounce the contacts. The power on off switch is pushed the logic low that gets sent Sony KP61XBR48 When the power button is to the CPU is not staying low. It get corrupted with a bounce pushed in the set will shut off then turn back on caused by the contact in the Power on -off switch. This fix is again to install a 2.2 mfd capacitor across the on-off switch to debounce the ON/OFF switch/ KP46S15 serial 9013364 Unit has leaking CRT Unit has convergence. Both red and green CRT Unit will need replacement Red and green CRT's are leaking coolant leak. Damage is localized to just the CRT's.
BRAND MODEL Chassis KEYWORD SYMPTOM CURE The blue tube has a rupture in the Expansion chamber. Unit KP46S25 serial 9025552. Blue CRT leaking on "E" needs three CRT's and "E" board. (A-1343-248-A) which is board. Also the red and green tubes are showing NLA. Asking tech to go out and get the "E" board to clean it signs of seal rupture around the tubes. in shop environment. KP46S25 Serial# 9010029 Unit s blue CRT No board damaged by the leaking. Unit has to have the blue leaking. CRT replaced KP53S25 serial 924413 Unit has leaking blue CRT OK to order the E bard and CRT. KP53XBR45 serial# 9012936 Blue CRT leaked Unit needs Blue CRT and attempt to clean the "E" board dropped over E-board When checking IC901(1&13) and IC903(13) we had no positive voltages that would cause a high voltage protect shut down. At no time did we ever get high voltage or Horizontal drive, for the High voltage output, Q801. However KP53XBR45.Serial# 9015424 Unit had two CRT's Q505, the horizontal driver for the horizontal output always Red and Blue leaked on the original "E" board had drive to it. When the first technician replaced the prompting their replacement. After changing the original circuit board it was discovered that he did not CRT's and the "E" board it was discovered the set transfer the jumpers on CN804. There must be three had a symptom of immediate shut down. jumpers on this connector otherwise the set will never get high voltage. CN804(1&2), CN804(3&4), CN804(5&6). Unit needs these three jumpers to route the 2 ABL circuits,.Horizontal drive pulse. Replacing these jumpers restored KP53XBR45 serial 9032096. Unit has burned CRT's again. CRT were replaced in October of This customer was warned last year this would be a 1 time 1998 because of a bar burned across the face replacement for this symptom. They were warned that plate. Now the same bar is burned across the face continuous display of a stationary image will burn any CRT plates of green and blue CRT's. This is caused by especially a projection television. the stock market channel and or CNBC banner at the bottom of the screen

KP53V25

NO TURN ON

no turn on

BRAND MODEL Chassis KEYWORD SYMPTOM CURE Checking the ID codes in the set wee found all id codes correct except for ID4 it was 64 instead of 80. Resetting the code to 80 caused the set to loose raster and enter the video input mode. We let it do that and initialized the EEPROM. Everything operated correctly after that point Rainbow caused by the speaker wire casting a shadow in the light path from the projected image. Tech needs to reroute wire. Next tech will need to install a 2.2 mfd capacitor across the power switch. Unit has no high voltage. "E" board is wet from glycol coolant leak from the Red and Blue CRT's that are leaking Red an Blue tube The defect as the tech explains showed up as a straight horizontal line at the top of the screen. It was a discoloration toward the color yellow when White is displayed. Also on the lower corner was a dark circular pattern that did not match the curvature of the Fresnel lens. I instructed the tech to inspect the entire optical light path for any defects. Tech reported back to me the mirror had a smear completely across the surface area. Possibly caused by a previous cleaning with a cleaning rag that has some oil based contaminate. Gently cleaning the mirror corrected the fault.
KP53S25 Unit will play then it will go to a slight green picture the channel displays will come on automatically Sony KP61XBR48. Unit has rainbow colors in the lower right hand corner & when the power turned off using the power button on the television the set will not shut off. KP41T15 Unit is turning on. Timer light flashes at turn on and set will have sound, but no raster.

RAINBOW

SCREEN
Sony KP53XBR45 Unit has a streak across the top of the screen Appears like the unit has a defective screen, or a scratch between the Lenticular and fresnel lens. Tech calling in for an authorization for screen replacement.
BRAND MODEL Chassis KEYWORD SYMPTOM CURE When checking IC901(1&13) and IC903(13) we had no positive voltages that would cause a high voltage protect shut down. At no time did we ever get high voltage or Horizontal drive, for the High voltage output, Q801. However Unit had two CRT's Red and Blue leaked on the Q505, the horizontal driver for the horizontal output always original "E" board prompting their replacement. had drive to it. When the first technician replaced the After changing the CRT's and the "E" board it was original circuit board it was discovered that he did not discovered the set had a symptom of immediate transfer the jumpers on CN804. There must be three shut down. jumpers on this connector otherwise the set will never get high voltage. CN804(1&2), CN804(3&4), CN804(5&6). Unit needs these three jumpers to route the 2 ABL circuits,.Horizontal drive pulse. Replacing these jumpers restored Measuring the 200 VDC source the finds no voltage, Unit Unit turns on but goes into shut down after raster has open R859. Unit will need modification listed in bulletin comes on and the set has a bright screen with 291R1 and 281R1 Tech will need to correct the main retrace lines. Unit now has all three CRT burned problem then after corrected the CRT will have to be I had tech measure the B+ at the +135 and the -135 VDC sources. The -135 was not indicating any voltage. There is a 18 ohm short to ground on the emitter of the horizontal output transistor. I'm having tech check into the Horizontal Sony KP53V35. Unit goes into an immediate shut pin amp and horizontal output transistor. If a short in this down. Unit will not turn on at all. Unit will try to turn circuit occur when the set ha a picture it is very likely that on but shuts off. CRT damage has occurred. It is recommended the screen be removed or use what ever method available to check the CRT faceplates for phosphor burns. If burned the CRT will also need replacement. Q510 and Q509 shorted

BRAND MODEL Chassis KEYWORD SYMPTOM CURE The picture turns a reddish or pinkish cast after 20 minutes This is intermittent. Pix flashes upside down then back to normal. This takes about 20 defective Jungle IC chip IC301 minutes but can be accelerated by heating the IC301 with a heat gun. I had tech disconnect all connections (except to the variable/fixed output) to the rear of the set while in the condition mentioned in the first complaint. After all other Sony KP53S65. Cust has two complaints. 1. Unit inputs to the set was disconnected the CATV connection was has low level AC hum when using an external amp the only connection remaining. When it was disconnected connected to the variable/fixed or the monitor the hum disappeared. This indicated the trouble is caused by outputs of the television. The hum is present when a "Ground Loop" This condition is caused by the CATV the volume on the TV is muted or set to minimum, ground is a different potential than the rest of the equipment. and the volume of the external is turned up 20%. This may not be able to be corrected without an electrician The hum is quite noticeable at this level. 2. When checking the customer electrical neutral and ground using the variable/fixed outputs the set will not connections in the customer house wiring. We can simply have left channel output. solve the trouble by having the CATV company installing a "ground breaker" in series with the CATV feed. 2. The no output to the left channel output is caused by a torn trace at the left output connector for the variable/fixed outputs. Tech calling in for Red CRT Approval. CRT is Arcing in the KP53V45 Unit has red tube that is arcing. Neck. KP53V45 No audio. While in the process of Unit has a defective PS401 fuse and IC403 in the output servicing the set the unit lost Green and blue have stage. As for the convergence problem there is a loose connection between the "A" board an the "G" lost convergence. KP53V75 Serial # 9018895. After the set is on for I have never heard of this symptom but since the television only a brief period of time there will be a slight Hiss is under warranty and is covered in the S.A.Y.S. program that will come an go in the right channel audio. It then It would be best that the "A" board be replaced. Note to can be heard even if the TV is placed in "AUX" tech is that he must copy down the EPROM values or the mode, with no input the his is noticeable tech will need to re-converge the set from scratch.

KP41T35 Unit has a symptom of an uneven This symptom is known as line paring. I sent tech information pattern covers the entire screen. It consists of approx. 1/16th of an inch lines that are interlacing, on the symptom that may lead him to the conclusion that the kind of a basket weave look like. Tech replace the Jungle IC is at fault Flyback with no effect in the symptom. I asked the tech to remove CN501 from the "G" board and try starting the set up again. The set turned on and developed high voltage. Tech did not follow instructions in the bulletin #396. This area was covered in detail in the class. Unit has a shorted Red CRT and burned video driver IC on the CR board. Tech will need the CRT, and the RED tech needs to inspect the filament winding continuity at CN766(5 & 4) at the blue CRT socket with all CRT's disconnected This resistance should be around 1 ohms. In this case the unit was 53 ohms. I instructed the tech to check into filament winding and R569. Quick check of Q569 found it had increased in value to over 50 ohms. It is supposed to
KP53V75 serial 9008493. Unit is not turning on. The power supply turns on but it will not develop high voltage.
KP61V45 serial 9000412 Unit has no raster. Unit appears to have high voltage but no filaments.
BRAND MODEL Chassis KEYWORD SYMPTOM CURE This symptom is generally indicative of a vertical failure. I had the tech measure the + & - 15 vdc from the main power supply at PS601 & PS602. PS601 was open causing the -15 volts to be missing. However two weeks later we were out KP53V75. 9057801 Unit has no raster and cycling again to replace both fuses. Customer claimed as before the on and off every 2 seconds. When turning up the set was working fine the day before and he turned it on in the G2 on any one of the CRT's the CRT will not have morning and it failed to have raster. This indicated the fuses a complete raster but a glow that will be brighter on were opening at "TURN ON" rather than failing while the top of the screen than the bottom. watching the set. It was indicated by Sony there was going to be a bulletin on this unit that reduced the size of the filter capacitors on the + & - 15 volt lines, All 4 electrolytics are reduced from 1000 mfd to 470 mfd @ 25vdc. These are C656, C657, C815, & C889. After replacement no more I had tech check continuity on the AC line cord which would measure the resistance of the Stand by transformer. Continuity was 570 ohms which is good. Next the tech needs KV53V75 Unit will not turn on. to measure the input of IC641 it must be 20 volts. IT Was. The output of IC641 was "0" This IC is a 3 legged linear regulator with a generic # of 7812. It should have had a 12 The PIP and comb filter assembly are in the "PT" module. CN5001(5) is the sub video input for the PIP signal. However KP53S65 serial 9141528. Unit has a normal the CN5051(14) is the Luminance output is missing. The U & picture but it does not have luminance in the PIP V signalsCN5051( 16 & 15) are present. (They are the Red area. and blue portions of the PIP signal) Tech needs to replace the "PT" module part # 1-665-394-12 When measuring the cathode driver pin on the CG socket with it connected to the tube we found 36 volts. When Unit has a bright screen with retrace lines. disconnecting the socket the voltage rises to 177 vdc. Unit has defective CRT A-1501-372-A

BRAND MODEL Chassis KEYWORD SYMPTOM CURE Monitor the cathodes of each CRT at the instant of turn on. All cathodes were close to 186 volts. But as soon as the raster appeared the voltage dropped to 89 volts. This indicates the CRT's are in saturation. During this test the 200 volt source was still is running nearly 200 vdc.The IK lines are causing this problem. Measuring the IK line at the "CG" board at CN731(1) we measured 5 volts DC as soon as we turned on the set. After the picture appeared the voltage did not change. (NOTE: on a working set this voltage should be near Zero volts as long as there is "0" beam current. Each cathode had a normal IK pulse of 38 volts. The IK Buffers on each board are very hard to get to so another plan was develped to check these devices. The following transistors are the IK buffers Q733{CG board} Q764{CB board} & Q706{CR board). They are hidden by a heat sink for the Video output transistor. This unit had a leaky Q733.
KP53V80 serial 9004624. Once the set is turned on the raster will appear as a bright screen with BRIGHT RASTER video but the brightness is intense. There are no retrace lines. The set does not have any On screen display, sound OK.
KP53V80 serial 9007644 Once the set is turned on the raster will appear as a bright screen with video BRIGHT RASTER but the brightness is intense. There are no retrace defective Q764 Is leaky lines. The set does not have any On screen display, sound OK.
BRAND MODEL Chassis KEYWORD SYMPTOM CURE Monitor the cathodes of each CRT at the instant of turn on. All cathodes were close to 186 volts. But as soon as the raster appeared the voltage dropped to 89 volts. This indicates the CRT's are in saturation. During this test the 200 volt source was still is running nearly 200 vdc.The IK feedback lines are causing this problem. Measuring the IK KV53V80 serial 9008877 After the set is turned on line at the "CG" board at CN731(1) we measured 5 volts DC the raster will appear as a bright screen with video. as soon as we turned on the set. After the picture appeared BRIGHT RASTER But the brightness is intense. Tech replaced the the voltage did not change. (NOTE: on a working set this "A" board which did not cure the symptom. The set voltage should be near Zero volts as long as there is "0" does not have any OSD either beam current. Each cathode had a normal IK pulse of 38 volts. The IK Buffers on each board are very hard to get to so another plan was develped to check these devices. The following transistors are the IK buffers Q733{CG board} Q764{CB board} & Q706{CR board). They are hidden by a heat sink for the Video output transistor. This unit had a KP61S70 serial 9007325 Unit is 1 day old. The On this chassis all of the sub deflection yokes are protected customer claimed the set popped then the set lost by fuse links. The fuse for the blue vertical sub deflection is CONVERGENCE convergence control for blue horizontal lines. This PS1506 an it's open. It is a 2 amp device. Part # 1-533-593mean the vertical sub deflection circuit is 11 malfunctioning KP61S70 serial 9005015. Unit is not developing Recommend that the tech order the "G" board. Unable to HIGH VOLTAGE high voltage but has Sound. No secondary provide part number. voltages from Main power supply