35
The waveform of the secondary part in transformer passes through the diode D1,D4 (1N4003), and then the voltage is
divided by means of the resistance R60 & R61. This voltage gives force to input the pulse to the MICOM terminal No. 37
on the ground of action of the TR Q6 (C3202Y).
3. CAUTION FOR A/S
• When the phenomenon of no electric power supply happens, to begin with check the electric power supply unit, and
then check the INTERRUPT UNIT. It is desirable to measure Q7 (C3202Y) with tester and C21 (C103Z).
RESET UNIT
1. CIRCUIT DIAGRAM
2. EXPLANATION OF CIRCUIT
• The RESET unit is a hardware circuit, of which all programs are initialized, when the power switch is 'ON'. Here, the
reason why uses RESET I.C. is that the RESET UNIT prevents the MICOM from incorrect action. Also, the R37 & C19
(104Z), as a RC filter, is used in order to absorb the noise.
• The waveform measurement of the part
!
with being 'ON' the power switch.
3. CAUTION FOR A/S
• Check the output of the RESET I. C. and judge whether or not it is something wrong.
1. OUTPUT
2. INPUT (VDD)
3. GROUND
• The R38 and C20 turn on the accurate RESET value with controlling the RC time constant.
• After connecting the part of the dotted line & waveform
measurement
• The waveform measurement in the MICOM No.37.
5.4V
0V
R37 220
C19
104Z
C20
47uF
16V
33
R38 10K
RESET I.C
S-8054HN
D5 1N4003
C22
470uF
16V
+
–
+
–
MICOM
IC2
!
POWER SWITCH ON
RESET TIME
500 msec
190 msec
POWER OFF
4.9V
5.4V
0V
