Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KP53XBR45 RA1 | CRT | KP53XBR45.Serial# 9015424 Unit had two CRT's Red and Blue leaked on the original ""E"" board prompting their replacement. After changing the CRT's and the ""E"" board it was discovered the set had a symptom of immediate shut down. "" | 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 Q505, the horizontal driver for the horizontal output always had drive to it. When the first technician replaced the original circuit board it was discovered that he did not transfer the jumpers on CN804. There must be three 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 | Muller |
| Sony | KP53XBR45 RA1 | CRT | KP53XBR45 serial# 9012936 Blue CRT leaked dropped over E-board | Unit needs Blue CRT and attempt to clean the ""E"" board "" | Muller |
| Sony | KP53S25 RA1 | CRT | KP53S25 serial 924413 Unit has leaking blue CRT | OK to order the E bard and CRT. | Muller |
| Sony | KP46S25 RA1 | CRT | KP46S25 Serial# 9010029 Unit s blue CRT leaking. | No board damaged by the leaking. Unit has to have the blue CRT replaced | Muller |
| Sony | KP46S25 RA1 | CRT | KP46S25 serial 9025552. Blue CRT leaking on ""E"" board. Also the red and green tubes are showing signs of seal rupture around the tubes. "" | The blue tube has a rupture in the Expansion chamber. Unit needs three CRT's and ""E"" board. (A-1343-248-A) which is NLA. Asking tech to go out and get the ""E"" board to clean it in shop environment. "" | Muller |
| Sony | KP46S15 RA1 | CRT | KP46S15 serial 9013364 Unit has leaking CRT Unit has convergence. Both red and green CRT are leaking coolant leak. Damage is localized to just the CRT's. | Unit will need replacement Red and green CRT's | Muller |
| Sony | KP61XBR48 RA1 | control panel | Sony KP61XBR48 When the power button is pushed in the set will shut off then turn back on again | The power on off switch is pushed the logic low that gets sent to the CPU is not staying low. It get corrupted with a bounce caused by the contact in the Power on -off switch. This fix is to install a 2.2 mfd capacitor across the on-off switch to de-bounce the ON/OFF switch/ | Muller |
| Sony | KP53XBR45 RA1 | control panel | Sony KP61XBR48 When the power button is pushed in the set will shut off then turn back on again | The power on off switch is pushed the logic low that gets sent to the CPU is not staying low. It get corrupted with a bounce caused by the contact in the Power on -off switch. This fix is to install a 2.2 mfd capacitor across the on-off switch to de-bounce the contacts. | Muller |
| Sony | KP53S35 RA1 | CHROMA | Sony KP53S35 . Unit has poor chroma of the main picture. | It appears like a loss of chroma phase lock of the 3.58 internal oscillator. The frequency is unstable. Recommend tech resolder the connections on X301, C305, C310 and R322 in the AFCFL circuit of the Jungle IC. This is IC301 near pins 1, 2, and 3.. Unit had broken connection on R322. | Muller |
| Sony | KP53XBR45 RA1 | audio | KP53XBR45 serial # Unit has history of the ""GB"" board shorting out the switching transistors in the switcher supply. Q1201, & Q1202 short with R1206 opening. By simply replacing the transistors and C1210, C1211, C1212, and C1213 the power supply will run for 3 to 5 weeks then short the switching transistors again. The customer explained that they lost audio while the set was playing. The sound quality was normal up until the event that took place to short the switching transistors. This has happened 2 times. Tech is wondering if there are any other case histories regarding this symptom. "" | Suggest the tech look at replacing the following components D1204, D1205, D1209, D1208, D1206, D1207, D1210, & D1211. These are the limiting diodes and have a generic # 1SS133T. In addition there are 2 zener diodes in the secondary of this power supply that are used as protection They are D1213, and D1214. They will act like a crowbar across the + or - 18 volt source in the event the voltage increases beyond the avalanche limits of the zener diodes. In addition to the components I would suggest the tech replace IC1201 | Muller |
| Sony | KP61XBR45 RA1 | AUDIO | KP61XBR45. unit has no audio.. When an external amp is connected to the Line outputs the set will produce line level audio to the external amp. | Tech is not getting B+ to any of the Audio output IC's on the ""K"" board. Apparently the ""GB"" board is not providing the B+ necessary for the audio to turn on. Tech needs to check the condition of the 4 fusible resistors in the +18 & -18 volt supply. R1217, R1273, R1297, R1295 "" | Muller |
| Sony | KP61XBR48 RA1 | AUDIO | Sony KP61XBR48 Distorted audio only when using the Surround mode or any high end audio feature. The sound is a raspy approx. 100 ~ 150 Hz buzz. | Call tech back regarding the IC or circuit involved with this expanded audio features. Unit in IC304( 8-759-248-74) Mixer IC305 (8-759-341-23) all located in the AA board complete board is A-1297-622-A | Muller |
| Sony | KP53XBR45 RA1 | arcing | KP53XBR45 serial 9012904 Unit Has an arcing Red and green CRT then shuts down. Tapping on the neck of the tube aggravates the symptom | Bulletin # 281R1 need to be preformed on this chassis. It will protect the CRT driver board from arc over damage as a result of an arcing CRT. It is suggested to replace both CRT's and perform upgrade on all 3 CRT driver boards. | Muller |
| Sony | KP46XBR25 Projectio n | CONVERGENCE | Unit has an intermittent ""Out of convergence"" picture. But now the unit is completely dead. "" | Tech needs to replace the Q603, Q614, R604, D605, both convergence IC's. D605 is shorted. | Muller |
| Sony | KV2084 P3 | SYSTEM CONTROL | Sony KV2084 Will not memorize any channels. Tech ordered the CPU and Memory IC. | I asked tech to check the negative supply voltage to IC103 Memory IC on 10, it should be -29 VDC before replacing the CPU and Memory IC. CPU was not needed. Verified the presence of the supply voltages at the memory chip. The memory chip was defective. | Muller |