Daewoo DWF-1095 E Series Manual page 22

• After connecting the part of the dotted line &
waveform measurement
The waveform of the secondary part in transformer passes through the diode D6, D9(1N4003), and then
the voltage is divided by means of the resistance R64 & R65. This voltage gives force to input the pulse to
the MICOM terminal No. 21 on the ground of action of the TR Q17(C3202Y).
3. CAUTION FOR A/S
• 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 the Q17(C3202Y) with tester and
the C10(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 R11 & C7(104Z) as a RC filter, is used in order to absorb the noise.
• The waveform measurement of the part 1
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 R12 and C8 turn on the accurate RESET value with controlling the RC time constant.
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• The waveform measurement in the MICOM
No. 21
BUZZER UNIT
1. CIRCUIT DIAGRAM
2. EXPLANATION OF CIRCUIT
• After the button action and total process ends, BUZZER is active.
• It is active directly with offering an output the frequency waveform of 2 KHz from the MICOM terminal
No.7.
• The R7 is 'PULL UP' resistance, and the R8 is restrict resistor of the Q1 base current, and the R5 is
resistance of excess current under phenomenon of short circuit, when the electric current changes
abruptly according to the condenser component of piezoeletric element, and the R8 remove the
phenomenon of abnormal oscillation by preventing the collector floating state of the Q1.
• The waveform in the part of the BUZZER DRIVE TR Q1 collector.
BUTTON INPUT UNIT
1. CIRCUIT DIAGRAM
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