Sony Trinitron CRT TVs - KV14T1U, KV16WT1U, KV21T3U, KV2171U, KV14T1U, KV16WT1U, KV21T3U, KVM2171U – faults and checking points

 SONY Trinitron BE4 CHASSIS Faults, checking points and suspected components

SONY KV 14TE1 CHASSIS BE 4

Does not turn on, LED flashes 6 times.

Flash 6 corresponds to "Overvoltage / Over current Protection (Pin 52) high", on pin 52 of the processor it has 5V when it should have been 100mV, the protection circuit is armed. In this case, it was due to a short circuit in the line transformer.

Deviate the tuning voltage.  Remove the black plastic that is located between the pins and the metal housing of the TUNER.

SONY KV14ME1  BE-4A CHASSIS

Low sound and failure. 

Replace D408 (zener 6v8)

SONY KVM2171U  BE4A CHASSIS

No text, excessive width, poor gray scale.

NVM corruption. Replace IC002 new type ST24C02FB6 (875937032). Change C0255 from 47uF to 1000uF, add 5.6V zener from pin 8 IC002 (cathode) to earth, tighten earth spring around CRT in the shape of U.

Frame collapse. 

R622 (HT feed) o/c, R814 0.47R safety (frame feed) o/c.

SONY KV21T3U  BE4A CHASSIS

Volume goes to max, no remote or front control functions. 

Micro gets hot, replace Micro part no 875947506.

In the pic (blank video).

D722 (871999133) o/c on CRT.

Blank raster with flyback lines.

A1 voltage too high, replace LOPTx.

SONY KV16WT1U  BE4 CHASSIS

Frame collapse (no picture).

R814 0.46R 0.5W (121781111) o/c, IC501 TDA9302, C504 100uF 50V, also replace D501 RGP10GP (871930243) or may fail again.

Frame collapse.

DJ L807 wire link to LOPTx earth.

SONY KV14T1U

Dead.

LOPTr Q802 S2055N s/c, R615 0.46R (121737100) o/c, IC601 STRS5706 s/c.

Colour lines on top.

EEPROM IC002 ST24C02CB1 (875937032).

SONY KVM2171U  BE4A CHASSIS

No text, excessive width, poor gray scale.

NVM corruption. Replace IC002 new type ST24C02FB6 (875937032). Change C0255 from 47uF to 1000uF, add 5.6V zener from pin 8 IC002 (cathode) to earth, tighten earth spring around CRT in the shape of U.

Frame collapse.

R622 (HT feed) o/c, R814 0.47R safety (frame feed) o/c.

SONY KV21T3U. BE4A CHASSIS

Volume goes to max, no remote or front control functions. 

Micro gets hot, replace Micro part no 875947506.

In the pic (blank video).

D722 (871999133) o/c on CRT.

Blank raster with flyback lines.

A1 voltage too high, replace LOPTx.

SONY KV16WT1U.  BE4 CHASSIS

Frame collapse (no picture).

R814 0.46R 0.5W (121781111) o/c, IC501 TDA9302, C504 100uF 50V, also replace D501 RGP10GP (871930243) or may fail again.

Frame collapse.

DJ L807 wire link to LOPTx earth.

SONY KV14T1U. 

Dead.

LOPTr Q802 S2055N s/c, R615 0.46R (121737100) o/c, IC601 STRS5706 s/c.

Colour lines on top.

EEPROM IC002 ST24C02CB1 (875937032)