Toshiba MD-0101 manual Circuit Description, PWA Block Diagram

5. CIRCUIT DESCRIPTION

5.1 PWA Block Diagram

		ADU PWA
		1	EXM-D	9	A			A1	4
		2	EXM-B	8	AB	IC2		A0	5
		3	EXM-C	7	B	Motor driver		B1	2
		4	EXM-A	6	BB			B0	3
						VREF	SP
		5	ADUCOVSW	+5V		12		11
		6	ADUFU		R6	R7,R8
		7	ADCNT
PWA	CN211		SG	SG
PFC		8
		9	+5V
		10	ADUFL
		11	NC
		14	FDM-A	9	A			A1	4
		15	FDM-C	8	AB	IC1		A0	5
		14	FDM-B	7	B	Motor driver		B1	2
		15	FDM-D	6	BB			B0	3
						VREF	SP
				+5V		12		11
			+24V
		1
			+24V		R14	R15,R16
PWA	CN212	2
		3
PFC
			PG
		4
			PG

+24V
	1
EXMA	2
EXMB	3
EXMC	4
EXMD	5
	6
	1
	2
SG	1
SG	2
+5V	3
	1
SG	2
+5V	3
+24V

1

FDMA2

FDMB3

FDMC4

FDMD5

6

CN216

CN214CN213CN217

CN215

ADU motor

(Upper)

ADU cover open switch

ADU paper jam sensor

(Lower)

ADU paper jam sensor

(Upper)

ADU motor

(Lower)

ADU 05-01-01

The ADU PWA has the motor driving IC only and the other signals pass through the PWA.

IC1 and IC2 are driver IC’s for the stepping motors and drive the ADU motors (upper/lower) on the output side according to the input signals. IC1 drives the ADU motor (lower), and IC2 the ADU motor (upper). Vref is the input to determine the value of the current which flows through each motor. The input voltage there determines the load (current value) to the motor.

ADCNT is a signal which detects connection of the ADU and connected to GND. When its connector is attached, the signal goes LOW so that the copier can confirm its connection.

October 2000 © TOSHIBA TEC 5 - 1 MD-0101 CIRCUIT DESCRIPTION