Protection Function - Sony FPF55C17196UA Service Manual

3.4 PROTECTION FUNCTION

Abnormality part
Overvoltage Stop(no latch)
Vw
Overcurrent Delay Latch
Overvoltage Stop(no latch)
Vx
Overcurrent Delay Latch
Overvoltage Latch
Vs
Low voltage Latch
Overcurrent Delay Latch
Overvoltage Latch
Va
Low voltage Latch
Overcurrent Delay Latch
Overvoltage Stop(no latch)
Vex
Voltage
Vey
Overcurrent pendency(no
latch)
Overvoltage Latch
Vcc
Overcurrent Delay Latch
Vpr2
Overcurrent Delay Latch
State of protection operation
(√:State change、 、 、 、 There is no change at the blank.)
State Vw, Vx
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
Vs Va Vex Vey
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
√ √ √ √
-14-
Reactivation
condition when
abnormal content
is excluded
AC
Va
Vcc Vpr Re-turn
ux
ing on
√
√
Yes
√
Yes
√
Yes
√
Yes
√
Yes
√
Yes
√
Yes
√
Yes
√
Yes
√
Yes
√
Yes
√
Yes
√
Yes
√ √ √
Yes