Ricoh ps150 Service Bulletin

20 December 1991

SPECIFICATIONS

1. SPECIFICATIONS

Copy Paper Size:	Maximum A3 or 11" x 17"
	Minimum B5R or 51/2" x 81/2"
Copy Paper Weight:	Black or single color copies:		52 to 104g
			14 to 281b
	Full color copies:		64 to 104g
			17 to 281b
Paper Feed System:	Feed and reverse roller (FRR)
Power Source:	100 V, 50/60 Hz, 0.6 A (From Copier)
Dimensions (W x H x	835 mm x 425 mm x 640 mm
D):	(32.9")	(16.7") (26.7")
Weight:	55 kg (1211b)

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PAPER SIZE AND END DETECTION

20 December 1991

2. PAPER SIZE AND END DETECTION

[A]

[B]

[F]

[D] [E]

[C]

Paper size is detected by an array of five photointerrupters [A] in the cassette entrance. The paper size sensors are actuated by a plate on the front of the cassette. Each paper size has its own unique combination of notches in the actuator plate [B]. The CPU reads which photointerrupters have been de-actuated (0 V to 5 V) by the actuator plate to determine which paper size has been inserted.

When a cassette runs out of paper, the paper end feeler [C] drops through a slot [D] in the cassette bottom plate. The paper end actuator [E], which is on the same shaft as the paper end feeler, pivots into the detector

(photointerrupter) [F]. The detector then provides a HIGH signal to the CPU informing it that the cassette is empty.

The Add Paper indicator then turns on, the Start key turns red, and the machines stops after the copy is finished.

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20 December 1991

PAPER SIZE AND END DETECTION

Actuator Plate Combination Table

	Paper Size	Sensor No.	Operation Panel Indication
		1 2 3 4 5	220 V	115 V
	A3	1 0 0 0 0	A3	*
	B4	1 1 0 0 0	B4	*
	A4 sideways	0 0 1 0 0	A4	*
	A4 lengthwise	1 0 1 0 0	A4R	*
	B5 sideways	0 1 1 0 0	u32	*
	B5 lengthwise	1 1 1 0 0	*	*
	A5 sideways	0 0 0 1 0	u32	*
	A5 lengthwise	1 0 0 1 0	u32	*
	B6 sideways	0 1 0 1 0	u32	*
	B6 lengthwise	1 1 0 1 0	u32	*
	Return Post Card	0 0 1 1 0	u32	*
	Post Card	0 0 1 1 0	u32	*
	11" x 17"	0 0 0 0 1	*	11" x 17"
	11" x 81/2"	1 0 0 0 1	*	11" x 81/2"
	11" x 15"	0 1 0 0 1	*	11" x 15"
	10" x 14"	1 1 0 0 1	*	*
	81/2 " x 14"	0 0 1 0 1	*	81/2" x 14"
	81/2" x 13"	1 0 1 0 1	F4	*
	81/2" x 11"	0 1 1 0 1	*	81/2" x 11" R
	81/2" x 51/2"	1 1 1 0 1	u32	81/2" x 51/2"
	81/2" x 13"(14")	0 0 0 1 1	*	*
	8" x 13" (14")	1 0 0 1 1	F	*
	8" x 101/2"	0 1 0 1 1	*	*
	8" x 10"	1 1 0 1 1	*	*
	51/2" x 81/2"	0 0 1 1 1	*	51/2" x 81/2"
	No Cassette	1 1 1 1 1	*	*

1: Not interrupted (Low)

0: Interrupted (High)

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