XE-A110. XEA110 Service Manual - Sharp ECR Service Manual (repair manual). Page 8

The X1 generator 32.768KHz which is primarily used to update the
internal RTC (Real Time Clock).
The X2 generator 12MHz which is used as main clock.

When the power is supplied, voltage Vo from the power supply circuit
rises. When it reaches about 6.2V, point A is driven to HIGH so that
the POF signal of the CPU is fixed to HIGH with Vcc and the CPU
performing power ON process.
When voltage Vo falls below about 6.2V by turning off the power,
point A is driven to LOW to fix the POF signal of the CPU to LOW and
the CPU performs power OFF process.

Since Q1 is turned on by Vcc, the RES signal is driven to LOW to
reset the CPU. After that, discharging of C8 turns off Q1 to drive the
RES signal to HIGH.

When the RWND signal from the CPU is HIGH, Q2 is turned on to
operate the motor.

When the DR signal from the CPU  is HIGH, Q3 is turned on to
operate the solenoid.

XT1

XT2

X1

X2

CPU

IC1

X1

X2

32.768K

12M

C15
30p

C14
30p

C13
33 p

C12
22 p

POF

VO

VCC

ZD1

MTZ6.2B: XE-A110
MTZ6.2A: XE-A130

R4
5.6K

C7
3.3µF/50V

R6

100K

R5
56K

D5

A

from power supply circuit

VO

POF

VCC

VCC

VDD

RES

C8
22µF/50V

D6

R7
2.7K

R8
1K

R9
4.7K

Q1
C3198

C19
M104

TRG

Sub Timing puls detector

Timming puls detector

Reset puls detector

Driver

IC

T

VCC

M

t

R

Trrigger magnet

T

t

R

6V

V O

M

MOTOR

Q2
C3784

R11
15K

R10

1K

RWND

V O

R12

1 K

R13
15K

Q3
C3784

D R

Solenoide

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