NEC DTE-25G5THS Service Manual page 45

Service Manual CP-785A
. If the TV set was on normal run mode before switching off, the microcontroller delivers horizontal drive
voltage at pin 33 and picture appears on screen.
. If the TV set was on stand-by mode before switching off, the microcontroller switches TV set to stand-
by mode, decreasing power pin voltage (pin 63). This matter will be explained on paragraph 5-9-2-b.
* Reset pulse circuit
from I823
pin 3
DC supply voltage
I823 pin 3
reset pulse
I501 pin 60
R591
Q510
220 Ω
R592
10k Ω
D591
DZ2.4
0V
0 V
Reset pulse circuit and corresponding waveforms
R594
Q511
10K Ω
R593
10K Ω
3.0V
1.2V
3.0V
1.2V
-44-
C501
+
50V
10 µ F
to I501
pin 60
3.3V