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)
