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FO-77U UX-66U

CHAPTER 3. MECHANISM BLOCKS
[1] General description
1. Document feed block and diagram
Hopper guide Separator rubber Separator plate Document sensor Back roller Operation panel PWB Document

3-2. Automatic document feed
1) Use of the paper feed roller and separation rubber plate ensures error-free transport and separation of documents. The plate spring presses the document to the paper feed roller to assure smooth feeding of the document. 2) Document separation method: Separation rubber plate

Separation rubber

Front sensor Paper feed roller CIS unit

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Feed plate Document

Paper feed roller

Fig. 1

Fig. 3

3-3. Documents applicable for automatic feed 2. Document feed operation
1) The original, which is set in the document hopper, feeds automatically when the front sensor is activated. This in turn activates the pulse motor which drives the document supply roller. The document stops when the lead edge is detected by the document sensor. 2) The lead edge of the original is fed a specified number of pulses after the lead edge of the document is detected for the reading process to begin. 3) The trailing edge of the original is fed a specific number of pulses after the trailing edge of the document deactivates the document sensor. The read process then stops and the original is discharged. 4) When the front sensor is in the OFF state (any document is not set up in the hopper guide), the drive will be stopped when the document is discharged. Square 4x6 series (788mm x 1091mm x meter series 1000mm sheets) Minimum Feeder capacity Paper weight 45kg Maximum 69.2kg Minimum 52g/m2 Maximum 80g/m2 5 sheets, max.

Paper thickness (ref.) 0.06mm 0.09mm 0.06mm 0.09mm Paper size 148mm x 140mm ~ A4 (210mm x 297mm), Letter (216mm x 279mm) NOTE: Double-side coated documents and documents on facsimile recording paper should be inserted manually. The document feed quantity may be changed according to the document thickness. Documents corresponding to a paper weight heavier than 69.2kg (80g/ m2 ) and lighter than 135kg (157g/m2 ) are acceptable for manual feed. Documents heavier than 135kg in terms of the paper weight must be duplicated on a copier to make it operative in the facsimile.

3. Hopper mechanism 3-1. General view

3-4. Loading the documents
1) Make sure that the documents are of suitable size and thickness, and free from creases, folds, curls, wet glue, wet ink, clips, staples and pins. 2) Place documents face down in the hopper. i) Adjust the document guides to the document size. ii) Align the top edge of documents and gently place them into the hopper. The first page under the stack will be taken up by the feed roller to get ready for transmission. NOTES: 1) Curled edge of documents, if any, must be straightened out. 2) Do not load the documents of different sizes and/or thicknesses together.

Fig. 2 The hopper section contains document guides that are used to adjust the hopper to the width of the original document. This ensures that the original feeds straight into the fax machine for scanning. Document width: 148 mm to 216 mm (A5 longitudinal size to Letter longitudinal size) NOTE: Adjust the document guide after setting up the document.

3­1

FO-77U UX-66U
Separation rubber Last page of document Back of document
Scanner frame

5. Recording block 5-1. General view
Recording paper

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First page of document
Platen roller Cutter guide

Feed plate Paper feed roller
Fig. 4

Pinch roller

3-5. Documents requiring use of document carrier
1) Documents smaller than 148mm x 140mm. 2) Documents thinner than the thickness of 0.06mm. 3) Documents containing creases, folds, or curls, especially those whose surface is curled (maximum allowable curl is 5mm). 4) Documents containing tears. 5) Carbon-backed documents. (Insert a white sheet of paper between the carbon back and the document carrier to avoid transfer of carbon to the carrier.) 6) Documents containing an easily separable writing material (e.g., those written with a lead pencil). 7) Transparent documents. 8) Folded or glued documents. Document in document carrier should be inserted manually into the feeder. Fig. 6
PO roller Cutter unit Paper guide Head guide Thermal head

5-2. Driving
Via the pulse motor gear shaft, the reduction gear, and the recording paper feed gear, rotation of the pulse motor is conveyed to the recording paper feed roller to feed the recording paper.

5-3. Recording
Use of a thermal head permits easier maintenance and low operating costs.

1) Thermal head
The thermal head consists of 1728-dot heat elements arranged in a single row and has the resolution of 8 dots/mm. The maximum recording speed is 10ms/line. The thermal head also incorporates a 1728-dot shift register latch and output control driver circuit. Low power consumption is achieved by dividing the head into nine segments.

4. Document release 4-1. General
To correct a jammed document or to clean the document running surface, pull the insertion side of document center of the operation panel. To open the upper document guide, the operation panel must be opened first.

2) Structure of the recording mechanism
Recording is accomplished by pressing the thermal head on the recording paper against the platen roller. The main scan (horizontal) is electronically achieved, while the subscan (vertical) is achieved by moving the recording paper by the recording platen roller. Usually, the cause for uneven print tone is caused by misalignment of the thermal head or uneven contact with the roller. It can by checked in the following manner. 1) Check if the thermal head power and signal cables are properly routed.

4-2. Cross section view

Operation panel unit Scanner frame unit CIS release lever

2) Check that the thermal head pivot moves smoothly up and down. 3) Check that the thermal head support bracket is secured without any play. 4) Check to see that the recording platen roller has proper concentricity, in the case of a print tone variation evenly repeated down the page.
PWB case unit

Lower cabinet

5) Replace the thermal head with a new one and check to see if the same trouble occurs.

Fig. 5

3­2

FO-77U UX-66U

[2] Disassembly and assembly procedures
· · · ·
This chapter mainly describes the disassembly procedures. For the assembly procedures, reverse the disassembly procedures. Easy and simple disassembly/assembly procedures of some parts and units are omitted. For disassembly and assembly of such parts and units, refer to the Parts List. The numbers in the illustration, the parts list and the flowchart in a same section are common to each other. To assure reliability of the product, the disassembly and the assembly procedures should be performed carefully and deliberately.

1

Paper support guide, handset cover and scanner unit

Parts list (Fig. 1)
No. 1 2 3 4 5 6 Part name Mechanism unit Screw (3×12) Paper support guide Paper sensor lever Paper sensor lever spring Panel stopper Q'ty 1 2 1 1 1 1 No. 7 8 9 10 11 12 Part name Screw (3×8) Handset cover Hook switch lever Screw (3×12) Connector Scanner unit Q'ty 1 1 1 2 2 1

2

1 2 3 4 5 6

7 8 9 10 11 12

10 12

3
Hook

2 10 4
Fix position of spring

4

5 9 7 11
Hook Hook Hook

5

6

8

Hook

Control PWB

Hook

1

Fig. 1

3­3

FO-77U UX-66U 2 CIS unit and scanner frame
Parts list (Fig. 2)
No. 1 2 3 4 5 6 7 8 9 10 Part name Document guide lower Back roller gear Back roller bearing, left CIS release lever, left Back roller CIS release lever, right Back roller bearing, right Reduction gear, 17/28z Reduction gear, 17/23z Feed roller shaft Q'ty 1 1 1 1 1 1 1 1 1 1 No. 11 12 13 14 15 16 17 18 19 20 Part name Feed roller Connector CIS support, left CIS support, right CIS unit CIS protect sheet CIS spring Connector Front sensor Scanner frame Q'ty 1 1 1 1 1 1 2 1 1 1

1 18 19 2 3 4 5 6 7 8 9 10

Hook

11 12 13 14 15 16 17 20

1 10 3 4 11 5 2 8 9 19 18 6 7
Hook

12

17 20 17

13

16

15

Fix position of CSI spring

20 14
Fix position

15
OK NG

15

17

13 , 14

13 , 14

Fig. 2

3­4

FO-77U UX-66U 3 Operation panel unit, drive unit, hopper guide
Parts list (Fig. 3)
No. 1 2 3 4 5 6 7 8 9 Part name Mechanism unit Connector Operation panel unit Connector Screw (3×12) Cutter cam spring Drive unit Cutter arm Screw (3×8) Q'ty 1 2 1 3 2 1 1 1 2 12 13 14 15 16 17 No. 10 11 Part name Hopper guide unit Operation panel unit/ document guide upper unit Screw Pinion gear Hopper spring Hopper guide, left Hopper guide, right Hopper guide 1 1 1 1 1 1 Q'ty 1 1

3 2 4 5 5
1 4 5 6 7 8 2 3 9 10 12 13 14 15 16 17 UP 11

6

Control PWB

2

7 8

1

9 11 10

12 17 13 14 15

Fix position

30°

14
boss

Confirm of HOPPER GUIDE position.
HOPPER GUIDE(R) Rib R GAP 0 Rib L HOPPER GUIDE(L) GAP 0

16

Fig. 3

3­5

FO-77U UX-66U 4 Upper cabinet and document guide upper
Parts list (Fig. 4)
No. 1 2 3 4 5 6 7 8 9 Part name Screw (3×8) Connector Door sensor Blind sheet Document guide upper unit Operation panel unit Separate spring Separator plate Separator rubber Q'ty 2 1 1 1 1 1 1 1 1 No. 10 11 12 13 14 15 16 17 18 19 Part name Feed spring Feed plate Document guide upper Screw (2×6) Connector Operation panel PWB unit Direct key Start key 12 key Upper cabinet Q'ty 1 1 1 3 1 1 1 1 1 1

1 2 3 4 6 5 13 7 14 8 15 9 16 10 17 11 18 12 19 1 5 4
Fix position

11 7 12 8 7 2 3 12 9 10

6

19

14
Rib

LCD CABLE LCD PWB LCD PWB Rib

14 16 17 18

Note) The LCD PWB should be securely locked by the click of the panel case.

15

13
Fig. 4

3­6

FO-77U UX-66U 5 Drive unit frame
Parts list (Fig. 5)
No. 1 2 3 4 5 6 7 8 9 10 Part name Cutter switch Cutter gear Cutter gear spring Cutter plate Cam spring Cam switch Cam gear Reduction gear, 17/30Z Idler gear, 30Z Idler gear, 25Z Q'ty 1 1 1 1 1 1 1 1 1 1 No. 11 12 13 14 15 16 17 18 19 20 Part name Idler gear, 25Z Planet lever C Planet gear Planet gear spring Reduction gear, 17/36Z Mode lever Planet gear Planet gear spring Reduction gear, 17/30Z Planet lever A Q'ty 1 1 1 1 1 1 1 1 1 1 No. 21 22 23 24 25 26 27 28 29 30 31 Part name Planet gear Planet gear spring Planet lever B Planet gear Planet gear spring Reduction gear, 17/43Z Idler gear, 25Z Screw (3×8) Motor Motor plate Drive unit frame Q'ty 1 1 1 1 1 1 1 1 1 1 1

1 2 3 4 5 6 7 8 9 10

11 12 15 16 19 20 23 26 27 28

13 14 17 18 21 22 24 25

29 30 31

29 30

28 5 2
OK NG

12 , 13 , 14 / 16 , 17 , 18 20 , 21 , 22 / 23 , 24 , 25
Grease

3

26 6

OK

NG

1 23
Grease

21 22 20

31
Nail be doing lock.

27

24 25 15

12 , 13 , 14 / 16 , 17 , 18 20 , 21 , 22 / 23 , 24 , 25

19 8 13 9 17 7

4

14 12

10 18 11 16
OK NG

Fig. 5

3­7

FO-77U UX-66U 6 Head guide, PO guide, cutter guide upper and cutter
Parts list (Fig. 6)
No. 1 2 3 4 Part name Mechanism unit Cutter guide upper PO guide unit Pinch roller spring Q'ty 1 1 1 2 No. 5 6 7 8 9 Part name Pinch roller PO guide Head guide Screw (3×6) Cutter Q'ty 2 1 1 1 1

1 2 3 4 5 6 7 8 9 4 5 3

6

Fix position

4
OK NG

1

7

2 8

9

Fig. 6

3­8

FO-77U UX-66U 7 PO roller guide and head frame unit
Parts list (Fig. 7)
No. 1 2 3 4 5 6 Part name Mechanism unit Screw (3×6) Connector Screw (3×12) PO roller guide unit PO gear Q'ty 1 1 1 1 1 1 No. 7 8 9 10 11 12 13 Part name PO roller rubber PO roller PO roller guide Screw (3×12) Head frame unit Screw (3×8) Panel lock lever spring Q'ty 2 1 1 1 1 2 2

1 2 3 4 5 6 7 8 9 10 11 12 13 11 3 6 4

2

Hook

5

10

12 13 7 1

8

9

7
Control PWB 12

7

8

7

13

Fig. 7

3­9

FO-77U UX-66U 8 Head frame and thermal head
Parts list (Fig. 8)
No. 1 2 3 4 5 6 7 8 Part name Platen gear Platen bearing Platen roller Connector Screw (3×6) Head earth cable Screw (3×6) Head holder, left Q'ty 1 2 1 1 1 1 1 1 14 15 16 No. 9 10 11 12 13 Part name Screw (3×6) Head holder, right Thermal head Document sensor lever Document sensor lever spring Head spring 2 Head spring 1 Head frame 2 3 1 Q'ty 1 1 1 1 1

1 2 3

4 5 6 7 8 9 10 11

12 13 14 15 16

2 3 1 8 2 4 16 10 15 9 5 12 6
NG

11

7

14
Fix position of Document Sensor lever spring

14

15

13

OK

Fig. 8

3 ­ 10

FO-77U UX-66U 9 PWB case top, bottom, PWB and speaker
Parts list (Fig. 9)
No. 1 2 3 4 5 6 7 8 9 10 Part name Mechanism unit Screw (3×8) Connector Connector PWB case unit Screw (3×8) Control PWB unit Screw (3×8) Speaker holder lever spring Speaker ass'y Q'ty 1 1 1 2 1 1 1 1 1 1 No. 11 12 13 14 15 16 17 18 19 20 Part name Screw (3×8) Hook switch joint lever PWB case, top PWB case, bottom unit Screw (3×6) TEL/LIU PWB unit Screw (4×6) AC cord ass'y Power supply PWB unit PWB case, bottom Q'ty 2 1 1 1 1 1 1 1 1 1

3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 7 6 8 9 10 5 2 4 4

13 12

16 15 17

Fix position

17 19 18

18

19

Hook 11 20 14 11

Fig. 9

3 ­ 11

FO-77U UX-66U 10 Wire treatment
Parts list (Fig. 10)
No. 1 2 3 4 5 6 Core (F2125) Screw (3×6) Screw (4×6) Screw (3×6) Band (100mm) Core (F2123) Part name Q'ty 2 2 1 1 3 1

Door sensor cable Panel cable Rib Door sensor cable Rib Panel cable Operation panel PWB Rib

Door sensor cable

Hopper cover

Operation panel unit

1

The panel cable and door sensor cable pass to the core 2 times. Panel cable 1 Rib

TEL/LIU PWB Power Supply PWB Speaker cable 2

The head cable and head earth cable pass to the core 2 times.

1

Rib

Cam switch cable Motor cable

Head earth cable

Rib

Door sensor cable Control PWB

1

Cam Cutter cable switch cable Rib Cutter cable Rib Drive unit Motor cable

5 Rib Speaker Front sensor cable CIS cable Head cable CIS cable Front sensor cable Rib Rib Speaker PWB case, bottom 2

CIS cable

5 5

6

TEL/LIU PWB AC ARG 4 cord cable 3 earth cable

3

AC cord earth cable

Rib Scanner frame Rib Rib

Speaker cable

Power supply PWB

AC cord

Fig. 10

3 ­ 12