Ricoh FT8880 Service manual

RICOH FT8880

SERVICE MANUAL

This manual is an insert upgrade which covers only the points where the FT8880 (A083) differs from the FT8780 (A084). Refer to the FT8780 service manual for any items not covered here.

IMPORTANT SAFETY NOTICES

PREVENTION OF PHYSICAL INJURY

1. While the machine warms up, it will suddenly start turning to perform the process control data initialization. Keep hands away from any mechanical and electrical components during this period.

2. Before disassembling or assembling parts of the copier and peripherals, make sure that the copier and the second sorter power cord is unplugged.

3. The wall outlet should be near the copier and easily accessible.

4. Note that some components of the copier, the paper tray unit, and the peripherals are supplied with electrical voltage even if the main switch is turned off.

5. If any adjustment or operation check has to be made with exterior covers off or open while the main switch is turned on, keep hands away from electrified or mechanically driven components.

6. The inside and the metal parts of the fusing unit become extremely hot while the copier is operating. Be careful to avoid touching those components with your bare hands.

HEALTH SAFETY CONDITIONS

1. Never operate the copier without the ozone filters installed.

2. Always replace the ozone filters with the specified ones at the specified intervals.

3. Toner and developer are non-toxic, but if you get either of them in your eyes by accident, it may cause temporary eye discomfort. Try to remove with eye drops or flush with water as first aid. If unsuccessful, get medical attention.

OBSERVANCE OF ELECTRICAL SAFETY STANDARDS

1. The copier and its peripherals must be installed and maintained by a customer service representative who has completed the training course on those models.

2. The RAM board on the main control boards on the copier and the RDH has a lithium battery which can explode if replaced incorrectly. Replace the battery only with an identical one. The manufacturer recommends replacing the entire RAM board. Do not recharge or burn this battery. Used batteries must be handled in accordance with local regulations.

SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL

1. Do not incinerate the toner cartridge or the used toner. Toner dust may ignite suddenly when exposed to open flame.

2. Dispose of used toner, developer, and photoconductors according to local regulations.

3. Dispose of replaced parts in accordance with local regulations.

4. When keeping used lithium batteries in order to dispose of them later, do not put more than 100 batteries per sealed box. Storing larger numbers or not sealing them apart may lead to chemical reactions and heat build-up.

SECTION 1

OVERALL MACHINE

INFORMATION

Overall

Information

5 June 1992 SPECIFICATIONS

1. SPECIFICATIONS

Main Copier

Copier

Configuration: Console Copy Process: Dry Electrostatic Transfer System Originals: Sheet/Book Original Size: Maximum: 11" x 17", A3 Copy Paper Size: Maximum: 1st and 2nd tray 8

1/2" x 14", A4

3rd tray 11" x 17", A3

Minimum: 1st and 3rd tray 5

2nd tray 8

1/2" x 81/2", A5 1/2" x 11", A4

Copy Paper Weight: Standard Copying: 14 ~ 42 lb, 52 ~ 157 g/m

Duplex Copying: 17 ~ 28 lb, 64 ~ 105 g/m Warm Up Time: Within 8.0 minutes (room temp. 68°F, 20°C) First Copy Time: 4.8 seconds (8 Copying Speed: 80 copies/minute (8

1/2" x 11", A4, feed from 2nd tray)

1/2" x 11", A4)

60 copies/minute (11" x 17", A3) Optional Equipment: Menu Reader

Key Counter

Guidance ROM Kit Reproduction Ratios: See the following table:

LT/DLT version A4/A3 version

200% 200%

Enlargement

155% 141% 129% 122% 121% 115%

Full Size 100% 100%

93% 93% 77% 82%

Reduction

74% 71% 65% 65% 50% 50%

2 2

1-1

SPECIFICATIONS 5 June 1992

Zoom: 50 ~ 200% Toner Replenishment: Cartridge exchange (1,500 g) Paper Feed: 1st tray (550 sheets)

2nd tray (3,000 sheets) 3rd tray (1,500 Sheets)

Power Source: 120 V, more than 20 A (LT/DLT version)

220, 230, 240 V, more than 10 A (A4/A3 version)

Power Consumption:

Maximum during LT/DLT version A4/A3 version

Stand-by 2.01 kw 2.00 kw

Copying Cycle 1.85 kw 1.89 kw

Dimensions: Copier Only: 65.4" x 30.0" x 56.9"

(1660 x 760 x 1444.5 mm)

With Finisher: 83.1" x 30.0" x 56.9"

(2110 x 760 x 1444.5 mm)

Weight: Copier Only: 917 lb/422 kg

With Finisher: 1027 lb/472 kg

Noise Emission: With Finisher/RDH:

Maximum: less than 70 db Copy-cycle: less than 69 db (average) Warm-up: less than 42 db

1-2

Overall

Information

5 June 1992 SPECIFICATIONS

Recycling Document Handler

Original Size:

Stack feed mode Single feed mode CFF mode

Maximum 11" x 17", A3 11" x 17", A3 11" x 9

Minimum 8" x 10

Original Weight:

Stack feed mode Single feed mode CFF mode

Maximum 28 lb, 105 g/m

Minimum 17 lb, 64 g/m

Number of originals to be set:

Weight

Size

A3/11" x 17" 30 sheets 20 sheets

Others 50 sheets 30 sheets

1/2", A4 51/2" x 81/2", A5

43 lb, 165 g/m

14 lb, 52 g/m

64~81 g/m

17~21 lb

20 lb, 80 g/m

17 lb, 64 g/m

82~105 g/m

22~28 lb

1/2" x 12"

11" x 14

1/2"

7/8"

Number of Recycles: Maximum: 60 times CFF Original Stack Height:Maximum: 50 mm Original Set: First sheet on top, stack face down

1-3

MECHANICAL COMPONENT LAYOUT 5 June 1992

3. MECHANICAL COMPONENT LAYOUT

3.2 RDH

14 13 12 10 9

3 4 5

1. Inverter Roller

2. Inverter Exit Roller

3. Air Knife Nozzle

4. Exit Roller

5. Original Guide

6. Feed-in Belt

7. Original Stopper

8. Right Turn Roller

9. Belt Drive Roller

10. Transport Belt

11. Transport Rollers

12. Original Feed Roller

13. Inverter Entrance Roller

14. Single Feed Exit Gate

15. Inverter Middle Roller

1-4

Overall

Information

5 June 1992 ELECTRICAL COMPONENT DESCRIPTIONS

4. ELECTRICAL COMPONENT DESCRIPTIONS

Refer to the electrical component layout on the reverse side of the Point to Point (Water proof paper) index numbers.

4.2 RDH

Name Function Index No.

Motors

Feed Drives the feed and transport rollers. 3 Belt Drive Drives the transport belt. 7 Inverter Drives the inverter and exit rollers. 34 Blower Supplies air to the air knife and draws air from the

vacuum section.

Separator Drives the original separator. 21

Sensors

Original Set Detects if the original is set on the document handler. 31 Entrance Detects the original leading edge and de-energizes

the feed belt drive clutch. 1st Transport Detects jams in the transport section. 16 2nd Transport Detects the original leading edge and lowers the

original feed motor speed. Registration Detects the original trailing edge for the original stop

position calculation. Inverter Entrance Detects jams in the transport belt section. 24 1st Inverter Detects the original trailing edge and reverses the

inverter drive motor rotation. 2nd Inverter Detects the original leading edge and energizes exit

roller release solenoid. Exit Detects the original leading edge and lowers the

inverter drive motor speed. Single Feed Set Detects the leading edge of the original in the single

feed table and turns the original feed motor. Single Feed Exit Detects jams in single feed mode. 25 Lift Detects if the RDH is open. 2 CFF Detects if the computer form is set in the CFF guide.

Counts the holes lined up to the computer form. Original Length Detects if the original stopper is set for 8 Original Height Detects the original height on the RDH. 20 Separator H.P. Detects if the original separator is in the home

position. Separator Detects if the last original of the original stack is fed. 23 Inverter Unit Cover

(Switch) Original Width

(Potentiometer)

Detect if the inverter unit cover is opened.

Detects the original width in the stack feed mode.

1/2" position. 19

1-5

ELECTRICAL COMPONENT DESCRIPTIONS 5 June 1992

Name Function Index No.

Single Feed Original Width (Potentiometer)

Detects the original width in the single feed mode.

Solenoids

Vacuum Shutter Closes the vacuum shutter. 4 Single Feed Gate Lowers the single feed gate. 8 Single Feed Exit Lifts the single feed exit gate. 26 Exit Roller Releases the exit driven rollers from the exit drive

rollers.

Clutches

Feed Belt Drive Transmits the original feed motor drive to the feed

belt rollers.

Feed Belt Brake Stops the feed belt rotation. 11

PCBs

Main Control Controls overall RDH operation. 6 Blower Motor Control Controls the vacuum motor operation. 1 Indicator Indicates the single feed mode indicators. 18

1-6

SECTION 2

DETAILED SECTION

DESCRIPTIONS

5 June 1992 DEVELOPMENT

6. DEVELOPMENT

6.4.3 Bias for the ID Sensor Pattern

ID Sensor

Full Size

Enlargement

Reduction

VL Pattern

ID Sensor Pattern

Detailed

Descriptions

Exposure Glass

Outside

The ID sensor pattern cannot always be used for the image density detection due to the position of the ID sensor and both the positioning and size of the ID sensor pattern on the drum. The outside of the exposure glass (no light) is exposed on the drum and used as the ID sensor pattern in reduction mode.

The potential of the drum in these cases, the no light and the ID sensor pattern exposure, is not the same. So the ID sensor bias (VBP) is determined using two base voltages, V0 for the no-light condition and Vd for the pattern.

VBP (no light) = --360 + V0 (Reproduction ratio < 77%) VBP (ID Pattern) = --360 + Vd (Reproduction ratio ≥ 77%)

The Vd value which is determined during the process control data initialization will be used.

V01 and V02, which are explained in the process control section, are used for the VBP calculation as the V0 (drum potential after the charge corona) value.

The VBP can be changed by the SP mode (Toner Density Correction). The following compensation will be applied to the above VBP.

Setting L N H VH

(V) --60 0 +60 +120

Default: H (+60 V)

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RDH 5 June 1992

16. RDH

16.1 OVERVIEW

16.1.1 No Inversion Original Cycle

[E] [B]

When the start key is pressed, the blower motor start to rotate. It supplies air to the air knife and draws air from the vacuum section. Sheets are separated at the leading edge [A] of the paper stack. The air comes from the nozzle [B] and the bottom sheet of the stack paper is held against the feed-in belts [C] by air suction [D]. The feed motor drives the feed drive [E], transport [F], and right turn [G] rollers. The bottom sheet of the paper is delivered through the feed drive, transport, right turn rollers to the registration section [H] and is stopped. To stop the original sheet at the proper position in the registration section, the feed motor rotation speed is reduced by half when the 2nd transport sensor [I] detects the leading edge of the original. The belt drive motor then starts to rotate the transport belt [J] to direct the sheet of paper onto exposure glass. At the same time, the next original is fed.

[F]

[A]

[D]

[C]

[H]

[J] [I]

[G]

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5 June 1992 RDH

[D]

[A]

[E]

[C]

[H]

[G]

[B]

[F]

Detailed

Descriptions

At the appropriate time, the transport belt delivers the original on the exposure glass to the inverter section [A], and the following original is moved onto the exposure glass, and the 3rd sheet of original is fed. The 1st original is passed into the inverter section through the inverter entrance [B], inverter middle [C], and inverter [D] rollers until the trailing edge of the original is detected by the 1st inverter sensor [E]. The inverter middle [C] and inverter [D] rollers then rotate in the opposite direction. The inverter exit rollers [F] rotates only in the paper exit direction. However, the contact between the inverter exit roller [F] and inverter exit driven roller [G] is released when the 2nd inverter sensor [H] is activated by the original. This way, the inverter exit roller does not interfere with the original switch back cycle while the inverter middle and inverter rollers begin reverse rotation. The original is delivered through the inverter entrance [B] and inverter exit [F] rollers to the original table. This continues until all originals have been returned to the original table. The originals are stacked on the original table where they wait for the next copy cycle.

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RDH 5 June 1992

16.1.2 Inversion Original Cycle

[A]

[B]

[C]

Until the original reaches to the inverter section [A], the sequence is the same as for no inversion original cycle. The inverter rollers [B] rotate in the original exit direction. The original is now inverted and exited to the original table [C]. This continues until all originals have been inverted. The inverted originals are then fed from the original table for copying of the reverse side. The sequence is the same as for the front side copying. The originals return and are stacked on the original table where they wait for the next copy cycle.

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5 June 1992 RDH

16.1.3 1 Sided Original 2 Sided Copy Mode

[A]

[B]

[C]

Detailed

Descriptions

No inversion original cycle is used for this mode. All the originals [A] are fed starting from the bottom original sheet. First, odd

numbered originals (in case of the illustration: 1st and 3rd originals) are copied and even numbered originals copy is skipped. The copied paper [B] is stacked in the duplex tray. The originals are return to the original table, and the original feed is then repeated. This time the odd numbered originals copy is skipped and even numbered originals are copied on the reverse side of the copy paper [C], which is fed from the duplex tray.

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RDH 5 June 1992

16.1.4 2 Sided Original 2 Sided Copy Mode

[A]

[B]

[C]

[D]

Inversion original cycle is used for this mode. All the originals [A] are fed starting from the bottom original sheet. First, the front side of the originals are copied. The copied paper [B] is stacked in the duplex tray. The originals [C] are inverted and return to the original table. The original feed is then repeated. This time the reverse side of the originals are copied on the reverse side of the copy paper [D], which is fed from the duplex tray.

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5 June 1992 RDH

16.1.5 2 Sided Original 1 Sided Copy Mode

[A]

[D]

[B]

Detailed

Descriptions

[C]

[E]

Inversion original cycle is used for this mode. All the originals [A] are fed starting rom the bottom original sheet. Firstly, the front side of all the originals are copied and the copied paper [B] is stacked in the duplex tray. The originals [C] are inverted and return to the original table. The original feed is then repeated. This time, the bottom copy sheet is fed from the duplex tray and exited from the copier without copying [C]. The reverse side of the bottom original sheet [D] is then copied to paper [E], which is fed from the paper tray, and the copy is exited from the copier [E]. This copy sequence exiting from the duplex tray followed by the paper tray is alternately repeated.

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RDH 5 June 1992

16.2 ORIGINAL SET

16.2.1 Stack Feed Mode

[A]

[C]

[B]

[H]

[D]

[E]

[F]

[G]

1. Original set detection

The originals are detected by the original set sensor [A] when they are stacked on the original table.

2. Size detection

The original width is detected by the original width sensor [B] under the front original guide [C]. Moving the guide changes the value of the sensor. (The sensor is a potentiometer.) The front original guide and rear original guide [D] are moved by the racks [E] and pinion [F] at the same time. The actuator [G] of the original stopper activates the original length sensor [H] (photo-interrupter) to detect if the original stopper is set for the 81/2 inch position. LG (81/2" x 14" = 216 x 356 mm) or B4 (257 x 364 mm) size is distinguished by the combination of the original length sensor (activated or not) and the value of the original width sensor. This is because the LG and B4 widths are very close.

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5 June 1992 RDH

[B]

[E]

[A]

[F]

Detailed

Descriptions

[D]

[C]

[E]

3. Original separator

The original stack which has been fed and returned to the original table, and the original stack which has not been fed yet, are separated by the original separator [A] mechanism.

When the start key is pressed, the separator motor [B] rotates until the original separator actuator [C] activates the separator home position sensor [D]. The original separator is set on the original top sheet. The originals which are fed and returned to the original table are stacked on the original separator. When the last original (top sheet under the original separator) is fed from the original table, the original separator drops and activates the separator sensor [E].

If the next copy cycle continues, the separator motor rotates and the original separator is set on the original top sheet again after the trailing edge of the last original sheet passes through the exit sensor [F].

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RDH 5 June 1992

16.2.2 Single Feed Mode

[A]

[C]

[E]

[D]

[B]

[F]

1. Original set detection

The original is detected by the single feed set sensor [A] when the original is set on the single feed table.

2. Size detection

The original width is detected by the single feed original width sensor [B] under the rear original guide [C]. Moving the guide changes the value of the sensor. (The sensor is a potentiometer.) The front original guide [D] and rear original guide are moved by the racks [E] and pinion [F] at the same time. As the original length sensor is not used for the single feed mode, the original length is not detected. When the B4 or LG original is set on the single feed table, the original size is determined by the machine version. (U.S.A. version machine ... LG, Europe version machine ... B4).

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5 June 1992 RDH

16.3 ORIGINAL FEED

16.3.1 Original Separation/Feed (Original Stack Mode)

[A]

[B]

[E]

Detailed

Descriptions

[B]

[F]

[D]

[C]

[F]

[G]

[H]

1. Air knife and shutter

The air from the blower motor [A] is blown through the air knife nozzles [B] to the leading edge [C] of the original stack. The blower motor keeps blowing air from the beginning to the end of the original stack mode to prevent multi-feeding.

After the originals are separated by the air knife, the vacuum shutter solenoid [D] is energized by a paper feed signal from the main PCB. The vacuum shutter [E] closes the air hole on the vacuum duct [F]. The blower draws air from the vacuum section [F]. The bottom sheet original [G] is held against the feed-in belts by the suction. Until, the feed-in belt rotates. The bottom sheet original [H] is then fed.

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RDH 5 June 1992

[A]

Table 1

Table 2

Small

Size

Large

Size

Small

Size

Large

Size

A4 8 x 101/2 81/2 x 11 81/2 x 13

A3 81/2 x 14

10 x 14 11 x 17

A4 8 x 101/2 81/2 x 11 81/2 x 13

A3 81/2 x 14

10 x 14 11 x 17

Original Height Sensor

OFF ON

3000 rpm

6000 rpm

3500 rpm

Number of Originals

5 or less from 6 to 12 13 or more

3000 rpm

6000 rpm

3500 rpm

2. Blower motor speed

To ensure good original separation and original re-stacking on the original table, the blower motor speed is changed according to the original stack height, or the number of originals stacked. The blower motor speed is determined for the 1st copy cycle by the original stack height as detected by the original height sensor [A] (Table 1). From the 2nd copy cycle, the blower motor speed is determined by the number of originals counted by the main PCB (Table 2).

When the number of the originals is 3 or less, the original set sensor is de-activated when the last original is fed and before the 1st original returns to the original table. During this period the blower motor stops rotating to ensure correct stacking the originals.

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5 June 1992 RDH

16.4 SINGLE FEED MODE

16.4.1 Registration

[D]

[E]

[B]

[A]

[C]

Detailed

Descriptions

[D]

When the single feed set sensor [A] detects the leading edge of the original the feed motor rotates and the right turn roller [B] transports the original. At the same time the single feed gate solenoid [C] is energized and the single feed gate [D] is lowered. The feed motor and single feed gate solenoid are energized until the registration sensor [E] detects the leading edge of the original. The original is transported until hits the single feed gate, which corrects the original feed skew. At the same time the right turn roller stops rotating.

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RDH 5 June 1992

16.4.2 Feed

[C]

[B]

[D]

[G]

[A]

[F]

[E]

When the start key is pressed, the right turn roller [A] and transport belt [B] rotate. The original is delivered onto the exposure glass. After the scanner scans the original, the transport belt start to rotate to deliver it. At the same time the inverter entrance [C] and inverter middle [D] rollers rotate and the single feed exit solenoid [E] is energized. The single feed exit gate [F] lifts up, exiting the original to the left top cover [G].

16.4.3 Exit Gate

In single feed mode and CFF mode, the single feed exit solenoid is energized while the belt drive motor is driving the transport belt, and is de-energized when the transport belt stops rotating. This solenoid on off operation is performed to keep the solenoid reliable.

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5 June 1992 RDH

16.5 DRIVE MECHANISM

16.5.1 Feed Motor Drive

[H]

[A]

[D]

[B]

[A]

[G]

[C]

Detailed

Descriptions

[H]

[E]

[F]

[C]

All the feed rollers and transport rollers (with the exception of the feed belt drive rollers [A]) begin to rotate together with the feed motor [B]. The feed belt drive clutch [C] is energized according to the appropriate original feed timing. When the clutch is energized, the feed motor drive will be transmitted through the gears [D] and timing belt [E], and the feed belt brake clutch shaft [F] to the feed belt drive rollers. The feed belt brake clutch [G] stops the feed belt rotation when the feed belt drive clutch is de-energized to prevent multi-feeding of originals. When the feed belt brake clutch is energized,the rotating clutch disk [H] is stopped by the clutch which is fixed on the frame.

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RDH 5 June 1992

16.5.2 Belt Drive Motor Drive

[B]

[A]

The transport belt [A] is driven by the belt drive motor [B] via timing belts and pulleys.

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5 June 1992 RDH

16.5.3 Inverter Motor Drive

[C]

[B]

[D]

[E] [F]

[A]

[H]

Detailed

Descriptions

[G]

[D]

[A]

The inverter motor [A] rotates forwards or backwards according to the appropriate timing. The inverter middle [B] and inverter [C] rollers rotate forwards and backwards the inverter motor drive. However, inverter entrance [D], inverter exit [E], and exit [F] rollers rotate in only one direction.

The relay pulley [G] and inverter roller pulley [H] have a built- in one way clutch inside. When the inverter motor rotates forwards (black arrow direction), the inverter roller pulley [H] rotates the inverter entrance roller [D]. In this case the relay pulley [G] freely rotates due to the one way clutch inside. All rollers rotate in the original feed direction.

While the inverter motor rotates backwards (white arrow direction), the relay pulley [G] rotates the inverter entrance roller [D]. In this case the inverter roller pulley [H] freely rotates due to the one way clutch inside. The inverter entrance, inverter exit, and exit rollers rotate in the original exit direction. However, the inverter middle and inverter rollers rotate in the original switching back direction.

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RDH 5 June 1992

16.6 ORIGINAL POSITIONING

Thin Paper Mode

Thick Paper Mode

Customers can choose the paper transport mode by "User Tool" depending on the thickness of the original used.

-- In thin paper mode --

The belt motor stops exactly when the trailing edge of the original passes the right scale [A] edge. (The timing is measured by the timing sensor after registration sensor is activated.)

-- In thick paper mode --

To correct skewing on the exposure glass, the original runs 10 mm after the trailing edge passes the right scale. The belt motor then reverses and the original travels until it meets the right scale.

If extremely thin paper is used in the thick paper mode, the paper may float near the scale. This will result in poor image quality or original copy wrinkling.

The factory setting is "Thin Paper Mode:.

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5 June 1992 RDH

16.7 CFF Mode

[C]

[A]

Detailed

Descriptions

[E]

[D]

[B]

When the CFF guide lever [A] is slid to the left, the CFF sensor [B] comes out of the single feed rear guide [C]. This sensor consists of one CFF set sensor [D] and two CFF feed hole sensors [E]. The CFF set sensor [D] and two CFF feed hole sensors [E]. The CFF set sensor detects if the computer form is set in the CFF guide.

The CFF feed hole sensor counts the holes lined up to the computer form.

2-19

SECTION 3

INSTALLATION

5 June 1992 INSTALLATION REQUIREMENT

1. INSTALLATION REQUIREMENT

1.1 ENVIRONMENT

1. Temperature Range: 10°C to 30°C (50°F to 86°F)

2. Humidity Range: 15% to 90% RH

3. Ambient Illumination: Less than 1,500 lux (do not exposure to direct sunlight)

4. Ventilation: Minimum space 20 m3. Room air should turn over at least 30 m3/hr/person.

5. Ambient Dust: Less than 0.15 mg/m3 (4 x 10-6 oz/yd3)

6. If the machine location is air-conditioned or heated, place the machine:

a) where it will not be subjected to sudden temperature changes. b) where it will not be directly exposed to cool air from an air-conditioner

in the summer.

Installation

c) where it will not be directly exposed to reflected heat from a space

heater in winter.

7. Avoid placing the machine in an area filled with corrosive gas.

8. Avoid any places higher than 2,000 meters (6,500 feet) above seal level.

9. Place the machine on a strong and level base.

10. Avoid any area where the machine may be frequently subjected to strong

vibration.

1.2 MACHINE LEVEL

1. Front to back level: within 5 mm (0.2")

2. Right to left level: within 5 mm (0.2")

3-1

INSTALLATION REQUIREMENT 5 June 1992

1.3 MINIMUM SPACE REQUIREMENTS

More than 15.8" (400 mm)

More than 11.8"

More than 11.8" (300 mm)

More than 39.4" (1000 mm)

(300 mm)

1.4 POWER REQUIREMENTS

1. Input voltage level: 120 V/60 Hz: More than 20 A (for U.S.A. version)

220 V/230 V/240 V/50 Hz: More than 10 A (for European version)

2. Permissible voltage fluctuation: ±10%

3. Do not set anything on the power cord.

NOTE: a) Make sure the plug is firmly inserted in the outlet.

b) Avoid multi-wiring.

3-2

5 June 1992 ACCESSORY CHECK

2. ACCESSORY CHECK

Check the quantity and condition of the accessories in the box according to the following list:

1. Operation Unit ................................................................1

2. Operation Unit Stand......................................................1

3. Fusing Unit Release Lever.............................................1

4. Key Counter Cover.........................................................1

5. Key Counter Bracket ......................................................1

6. Key Counter Plate Nut ...................................................1

7. Drum Guide ....................................................................1

8. Leveling Shoe.................................................................4

9. Operating Instructions Holder.........................................1

10. Editing Sheet..................................................................1

11. Sponge Cushion.............................................................1

12. Operating Instructions ...................................................1

13. Installation Procedure.....................................................1

14. NECR .............................................................................1

15. Envelop for NECR (-17 machine only)...........................1

16. User Survey Card (-17 machine only)............................1

17. M4 x 6 Screw..................................................................4

18. M5 x 8 Screw..................................................................4

19. M3 x 10 Screw................................................................2

20. M4 x 8 Screw..................................................................10

21. Harness Clamp...............................................................2

22. Bushing...........................................................................1

23. Operation Unit Stopper...................................................1

Installation

3-3

INSTALLATION PROCEDURE 5 June 1992

3. INSTALLATION PROCEDURE

[A]

[D]

[A]

[C]

[B]

[F]

[E]

CAUTION: While the leveling shoes are not installed, do not

completely pull out many units simultaneously. Otherwise, the machine could topple.

NOTE: Keep the shipping retainers after installing the machine. They will be

reused if in the future the machine is transported to another location. Proper reinstallation of the shipping retainers is required in order to avoid any transport damage.

1. Remove the strips of the filament tape [A] and remove the cushion [B] of the exposure glass.

2. Open the left and right front doors [C, D] and remove the strips of filament tape [E]. Remove the styrofoam block [F] under the transport unit.

3-4

5 June 1992 INSTALLATION PROCEDURE

[D]

[E]

[A]

[B]

[F]

[C]

Installation

[G]

[H]

3. Remove the fusing cover [A] (3 screws), fixing bracket [B] (1 screw), and reinstall the fusing cover. Install the fusing unit release lever [C], turn the lever clockwise, and fix it (1 M5 x 8 screw).

4. Pull out the duplex unit [D], open the upper guide [E], and remove the strip of the filament tape [F]. Reset the duplex unit.

NOTE: Do not pull duplex fork gate from positioning pin when removing

filament tape.

5. Remove the right cover [G] (2 screws) and 1 stud [H] securing the paper tray. Reinstall the right cover.

3-5

INSTALLATION PROCEDURE 5 June 1992

[D]

[M]

[A]

[B]

[I]

[K]

[E]

[C]

[H]

[F]

[G]

[J]

[L]

6. Remove the front scale holder [A] (2 screws), front scale [B] (2 screws), exposure glass [C], left top cover [D] (7 screws), and right rear cover [E] (front view, 2 screws).

7. Remove the 3rd scanner fixing bracket [F] (1 screw) and scanner fixing screw [G].

NOTE: The scanner fixing screw is required when replacing the scanner

wire. Please keep it for future use.

8. Reinstall the exposure glass, front scale, front scale holder, and the left top cover.

NOTE: • The mark [H] on the edge of the glass should face up. This

side is smoother and it generates less static electricity when the DF is used.

• Use the flat head screw for 4 screws [I].

9. Remove the left inner cover [J] (4 screws), strip of filament tape [K]. Then, remove the PTC unit [L], and the development unit [M] (1 screw and 1 connector).

3-6

5 June 1992 INSTALLATION PROCEDURE

[B]

[A]

Installation

[F]

[H]

[I]

[D]

[C]

[J]

[G]

[E]

10. Remove the charge corona unit [A] (1 connector and 1 clamp) and erase unit [B].

11. Lower the transport unit by the lever [C] as shown and remove the drum stay [D] and cleaning unit [E].

12. Remove the drum potential sensor [F] (2 connectors), ID sensor [G], and drum protection sleeve [H].

13. Reinstall all the units around the drum except for the development unit and PTC unit.

NOTE: Press the drum shaft [I] to the left and align the cleaning unit to

the guides [J] to prevent the drum damage when reinstalling the cleaning unit.

3-7

INSTALLATION PROCEDURE 5 June 1992

[A]

14. Remove the development filter [A] from the development unit.

15. Pour the developer (1 bag: 1.7 kg) evenly between the left and right side of the development unit and reinstall the development filter. Then, reinstall the development unit (1 connector and 1 screw), and PTC unit on the copier.

16. Load toner as follows (refer to the instruction decal): a) Shake a new toner cartridge well while holding it horizontally.

b) Turn the green lever clockwise. c) Insert the cartridge and return the green lever to the down position. d) Cut the green tape. e) Press down tab 1 and pull shutter 2 until you see the green tab 3. f) Grasp tab 3 and pull the seal until you see the red line. g) Push the shutter back in.

17. Install the left inner cover and set the transport unit.

3-8

5 June 1992 INSTALLATION PROCEDURE

[B]

[E]

[F]

[C]

[D]

[A]

Installation

[G]

[H]

18. Connect the operation unit [A] to the operation unit stand [B] (4 screws and 1 connector).

19. Install the operation unit (1 M5 x 8 screw [C] and 1 connector [D]) and the operation unit stopper [E] (2 M5 x 8 screws). The oval hole [F] of the operation unit stopper should be at the lower position.

NOTE: • 2 height positions of the operation unit can be selected by the

positions of securing screw [C].

• The operation unit can be moved left to right by removing one

M5 x 8 screw [C] when the operation unit is mounted at the lower position.

20. Secure the grounding wire [G] of the operation unit (1 screw) and reinstall the right rear cover.

21. Set the drum guide [H] to the lower inner cover.

3-9

INSTALLATION PROCEDURE 5 June 1992

[C]

[A]

[C]

[B]

[F]

[H]

[G]

[D]

[E]

22. Insert the leveling shoes [A] under the feet, and level the machine by securing down the feet.

23. Insert the sponge cushion [B].

24. Remove the strips of filament tape [C] of LCT.

25. Remove the LCT lower rear cover [D] (2 screws), fixing plate [E] (3 screws) and reinstall the LCT lower rear cover. Remove the LCT upper rear cover [F] (4 screws), fixing screw [G], fixing plate [H] (2 screws), and reinstall the LCT upper rear cover.

3-10

Installation

5 June 1992 INSTALLATION PROCEDURE

[C]

[D]

[B]

[F]

[A]

[E]

26. Remove the copier left upper cover [A] (2 screws) and left lower cover [B] (3 screws).

27. Cut 2 binds [C] for the LCT interface harness by the pliers.

28. Secure the ground wire [D] to the copier (1 screw).

29. 220/230/240 V version machines only If the voltage of electrical power supply from wall outlets is 220 V or 240 V, change the voltage as follows: a) Disconnect the input line [E] from the 230 V connector.

b) Disconnect the dummy connector [F] from the appropriate voltage (220

V or 240 V). c) Connect the input line to the appropriate voltage (220 V or 240 V). d) Connect the dummy connector to the 230 V connector.

3-11

INSTALLATION PROCEDURE 5 June 1992

[F]

[B]

[E]

[C]

[D]

[H]

[G]

[F]

[A]

[I]

30. Pass 6 connectors of the interface harness [A] through the rear upper hole [B] of the left lower cover and reinstall the left lower cover. Do not fix the screw [C]. Set 6 connectors to the connectors of the LCT harness [D].

31. Mount the LCT unit on the copier (Insert the 2 mounting studs [E] into the docking holes [F]).

32. Fix the LCT unit to the copier (1 screw).

33. Screw down the feet [G] to level the LCT so that the LCT is parallel to the main copier (see illustration).

34. Guidance ROM Kit installation (-27 versions only). Remove the operation unit rear cover [H] (4 screws) and install the appropriate ROMs [I] to the operation unit board. Distinguish the chips (0, 1, and c) by the last 4 digits of their part number. The lowest one is installed at 0, the middle one at 1, the highest one at c.

35. Reinstall all the covers.

36. Install the copy tray or follow the finisher unit installation.

37. Plug in the power cord and turn on the main switch.

38. Check the copy quality and the copier operation.

3-12

5 June 1992 INSTALLATION PROCEDURE

3.1 A3/11" x 17" COUNTER INSTALLATION

[A]

Installation

[B]

[C]

CAUTION: Unplug the copier power cord before starting the following

procedure.

1. Open the right front door and remove the right inner cover [A] (3 screws).

2. Install the A3/11" x 17" counter [B] (1 connector).

3. Cut the cap [C] of the right inner cover by the pliers.

4. Reassemble.

5. Plug in the copier power cord and turn on the main switch.

6. Set the A3/11" x 17" counter mode on by using SP mode.

7. Check the counter operation by making an A3/11" x 17" copy.

3-13

INSTALLATION PROCEDURE 5 June 1992

3.2 KEY COUNTER HOLDER INSTALLATION

[I]

[C]

[B]

[J]

[E]

[D]

[A]

CAUTION: Unplug the copier power cord before starting the following

procedure.

[H]

[F]

[G]

1. Open the right front door and remove the right inner cover (3 screws).

2. Remove the dummy connector [A].

3. Remove the right cover [B] (2 screws) and small cap [C].

4. Connect the key counter holder [D] to key counter bracket [E] with key counter plate nut [F] (2 screws).

5. Run the key counter harness [G] through the bushing [H] and right cover hole [I] and fix the key counter harness (1 screw and 1 harness clamp).

6. Install the key counter bracket to the right cover (3 screws).

7. Set the key counter harness connector to the 4P connector from the copier.

8. Reinstall the right cover.

9. Install the key counter cover [J] (2 screws).

10. Reassemble the machine.

3-14

SECTION 4

SERVICE TABLES

Service

Tables

5 June 1992 SERVICE REMARKS

1. SERVICE REMARKS

1.12 RDH

1. Take care not to damage the harnesses of the original table by pulling roughly when you remove the original table.

2. Take care not to injure yourself by dropping the RDH unit when removing it.

3. After replacing the RDH main PCB or RDH RAM board, perform the RDH motor adjustment, RDH registration adjustment, and CFF registration adjustment. (This allows the RDH to communicate with the copier main PCB.)

1.13 FINISHER

1. Do not turn on the main switch while the shift tray is not installed. Both the stack height sensor and the shift tray upper limit switch do not work without the shift tray, and causes the tray lift mechanism broken.

2. Before removing the timing belts, mark the position of the tension brackets.

4-1

SERVICE PROGRAM MODE 5 June 1992

2. SERVICE PROGRAM MODE

2.2 SP MODE FUNCTION

1 Jam Counter

Location Code

A Third Tray B Not used C Not used D Not used E Horizontal Transport Unit F Registration G Paper Separation H Fusing Unit

I Paper Exit

J Duplex Entrance K Duplex Paper Feed S First Tray U Second Tray

R1 Finisher Entrance R2 Finisher Exit R3 Jogger Unit Entrance R4 Jogger Unit

P1 RDH Feed-in P2 RDH Transport Unit P3 RDH Feed-out

NOTE: To clear counters, use SP mode (Counter Clear).

4-2

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

2 Daily / Weekly Jam Counter

Week 1 means first week of a month Counters are not cleared at the end

of the week or month. For example, if this menu is displayed on Monday, the counters of Tuesday through Friday is the data of previous week.

NOTE: To clear counters, use SP mode (Counter Clear).

4-3

SERVICE PROGRAM MODE 5 June 1992

3 Copy Counter

Test mode copy counter displays the number of copies in SP Test Mode

This counter only counts up when Test Copy Counter ON is (SP mode PAGE 4).

Block copy counter displays the number of copies after block copy counter clear (SP mode PAGE 1). Use this function when the machine is connected to a Remote Diagnostic System.

NOTE: 1. To clear counters, use SP mode Counter Clear).

2. The total number of copies can only be cleared by performing the RAM clear.

SET

4-4

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

4 Daily / Weekly Copy Counter

NOTE: To clear counters, use SP mode (Counter Clear).

5 Operating Time

Display the total rotating time of the main motor. Minutes are not displayed.

NOTE: This counter is only cleared by RAM clear.

(Main board DIP SW #1: ON, #2: OFF)

4-5

SERVICE PROGRAM MODE 5 June 1992

6 SC Counters

NOTE: To clear counters, use SP mode (Counter Clear).

4-6

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

6 SC Counters (continued)

NOTE: To clear counters, use SP mode (Counter Clear).

4-7

SERVICE PROGRAM MODE 5 June 1992

7 Sensor Output

ID Sensor

ID sensor output for bare drum

Vsg

surface

Vsp ID sensor output for pattern

Drum Potential Sensor

Vd set up value during the process

control sequence VL set up value during the process

VL1

control sequence

VL2 VL value during copy cycle

Residual voltage during the

process control sequence Potential sensor output when 100V

100

applied to drum shaft Potential sensor output when 800V

800

applied to drum shaft Drum potential just after charging

during the process control

sequence Drum potential just after charging

during copy cycle

ADS Sensor

ADS sensor output value during

the process control sequence ADS sensor output value during

copy cycle

Paper Feed Time Displays the interval between the time a paper feed clutch turns on and the time the registration sensor turns on.

Reference Time (theoretical number assuming no paper slippage)

(ms)

1st Tray 1,028

2nd Tray 730

3rd Tray 1,336

Duplex Tray 1,091

4-8

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

8 SP Test Mode -- 1 (PAGE 1 - 1)

Sensors

Turns on and off the 12-volt line of the dc drive board (CN302-2), which applies power to sensors, and checks sensor operation. The sensors which are normally activated during the stand-by condition cannot be checked because sensor output does not change.

Touch on the display. The copier automatically checks sensors and

START

displays defective sensor code numbers (maximum 5 sensors). Sensor Code Number

110 Paper Feed Sensor: 3rd tray 111 Upper Limit Sensor: 3rd tray 112 Lower Limit Sensor: 3rd tray 113 Paper End Sensor: 3rd tray 130 Paper Feed Sensor: 1st tray 131 Upper Limit Sensor: 1st tray 132 Lower Limit Sensor: 1st tray 133 Paper End Sensor: 1st tray 150 Paper Feed Sensor: 2nd tray 151 Upper Limit Sensor: 2nd tray 152 Lower Limit Sensor: 2nd tray 153 Paper End Sensor: 2nd tray 160 Paper Feed Sensor: duplex 163 Paper End Sensor: duplex 164 Pick-up Position Sensor: duplex 165 Duplex Entrance Sensor 400 Fusing Sensor 500 Exit Sensor 800 Toner Cartridge Sensor

4-9

SERVICE PROGRAM MODE 5 June 1992

8 SP Test Mode -- 2 (PAGE 1 - 2)

Solenoids/Clutches

Turns on and off the 24-volt lines to solenoids and clutches from the main board, and confirms component activity by checking electrical current value.

Touch on the display. The copier automatically checks components

START

and displays defective component code numbers (maximum 5 components). Solenoid/Clutch Code Number

100 Pick-up SOL: 1st tray 104 Paper Feed MC: 1st tray 106 Registration MC 200 Pick-up SOL: 3rd tray 204 Paper Feed MC: 3rd tray 205 Vertical Drive MC 300 Pinch Roller SOL 301 Inverter Gate SOL 302 Junction Gate SOL 303 Duplex Stopper SOL 304 Duplex Paper Feed SOL 305 Positioning SOL 306 Fork Gate SOL 1 307 Fork Gate SOL 2 308 Pressure Plate SOL 408 Cleaning SOL 411 2nd Tray Lock SOL 500 Pick-up SOL: 2nd Tray 504 Paper Feed SOL: 2nd Tray

4-10

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

8 SP Test Mode -- 3 (PAGE 1 - 3)

Item Function Test Method

Charge Cleaner Turns on charge and T/S corona

wire cleaners. (one round)

ID Sensor Adjusts Vsg value automatically

and makes ID sensor pattern, then checks Vsp value.

ADS Sensor Adjusts the ADS sensor

automatically and measures the original background density.

Drum Potential Sensor

Exposure Lamp Turns on the exposure lamps and

Applies 100 V and 800 V to the drum drive shaft from the development bais power pack and measures V

measures lamp intensity sensor value.

100 and V800 values.

Touch .

1. Touch on the display.

2. Press "Start" key top on the

Note: Test result is displayed in Sensor Output (SP mode ).

1. Touch to turn on lamps.

2. Touch to turn off lamps. Note: Test result is displayed in

Sensor Output (SP mode ).

START

SET

operation unit.

SET

RESET

4-11

SERVICE PROGRAM MODE 5 June 1992

8 SP Test Mode -- 4 (PAGE 2)

Test Procedure

Touch on the display and press "START" key top to start. Touch or press "CLEAR/STOP" key top to stop.

Drum Conditioning Mode

Free Run Mode (Lamp ON)

Free Run Mode (Lamp OFF)

Scanner Free Run Mode

RDH Free Run Mode

CFF Free Run Mode

Fusing Pressure Check Mode

Finisher Motor Test Mode

Finisher Free Run Mode

SET RESET

Item Function Remarks

Turns on the main motor, the development drive motor, corona power packs, and the erase lamp.

Operates the copier without feeding paper.

Operates the copier without feeding paper or turning on the exposure lamp.

Runs the scanner unit.

Feeds originals automatically without main copier operation.

Feeds CFFs automatically without main copier operation.

During copy cycle, a copy stops in the fusing unit for 15 seconds.

Operates the finisher drive motors in sequence.

Operates the finisher without feeding paper.

Place sheets of white paper (A3 or 11" x 17") on the exposure glass.

Do not operate the machine in this mode for a long time.

Before testing, set originals in the original table. The test is done when all originals are fed out.

Before testing, set CFFs in the original table. The test is finished when all CFFs are fed out.

Select a paper tray before accessing the SP mode and open document feeder to make sky shot.

The transport drive, stack feed, and exit drive motor speeds are adjusted automatically.

4-12

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

8 SP Test Mode -- 5 (PAGE 3)

Test Procedure

Touch on the display and press "START" key top to start.

SET

Touch or press "CLEAR/STOP" key top to stop.

Cleaning Blade OFF Mode

Process Control Initial Setting

Toner Forced Supply Mode

SC Detection OFF Mode

Jam Detection OFF Mode

Auto Drum Current Adjustment Mode

RESET

Item Function Remarks

Turns off the cleaning blade. This mode is only effective during

SP mode condition.

Start the process control data initialization.

Use free run mode (lamp on) at the same time. Supplies toner at the 30% setting.

Disables SC condition. This is only effective during SP mode condition.

Disables jam detection. This is only effective during SP mode condition.

Enable the adjustment of the T/S and PTC power pack outputs during process control initial setting.

To avoid over-toning, stop periodically (about 20 cycles) and check copy quality.

Default: RESET Use this function only after replacing a power pack. Otherwise, power pack outputs may not set to the proper value.

4-13

SERVICE PROGRAM MODE 5 June 1992

8 SP Test Mode -- 6 (PAGE 4)

1. Function

Turn on the individual power pack. Two or more power packs cannot be turned on at the same time in this mode.

2. Test Procedure

Touch to turn on and touch to turn off.

SET

RESET

NOTE: This mode may damage a drum; so, use this only with an old drum.

3. Code Table

C Charge corona T1 Transfer corona - first side T2 Transfer corona - second side

PTC Pre-transfer corona

D1 Separation corona - first side D2 Separation corona - second side D3 Separation corona - leading edge

4-14

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

9 SP Adjustment -- 1 (PAGE 1 and 2)

Adjusts an output voltage from each power pack. Output value changes

0.5% per step. Note: This adjustment is only for

the test purpose. Do not use this mode in the field.

C Charge corona T1 Transfer corona - first side T2 Transfer corona - second side

PTC Pre-transfer corona

D1 Separation corona - first side D2 Separation corona - second side D3 Separation corona - leading edge

Item Function Range

Separation Corona ON Timing Adj. Leading Edge Registration Adj.

Leading Edge Erase Adj.

Fusing Temperature Adj.

Exposure Lamp Adj.

Front Staple Position Adj. Rear Staple Position Adj.

Changes the ON timing of normal separation corona after leading edge separation. Changes the ON timing of the registration clutch.

Changes the ON timing of the image erase after the leading edge erase.

Adjusts the hot roller temperature. Use this mode with a thermometer.

Adjusts the light intensity of the exposure lamp.

Adjusts the front staple position.

Adjusts the rear staple position.

Adjustment Standards

Leading Edge Registration Leading Edge Erase

± 16

0 ~ 20

± 2 mm/0 ± 0.08" (Platen/Full Size)

± 3 mm/0.16" ± 0.12" (50 ~ 150%)

± 3 mm/0.24" ± 0.12" (151 ~ 200%)

Change/

Step

Approx.

2 mm

Approx.

1 mm

Approx.

1 mm

Approx.

1°C

1.3%

1 mm

Delay ON timing

Delay paper feeding

Widen erase width

Lower temperature

Increase light intensity

Move to rear

Move to front

4-15

SERVICE PROGRAM MODE 5 June 1992

9 SP Adjustment -- 2 (PAGE 3)

Item Function Range

Horizontal Magnification Adjustment (Full Size)

Horizontal Magnification Adjustment (50%)

Horizontal Magnification Adjustment (200%)

Focus Adjustment Adjusts the stop position of the

Vertical Magnification Adjustment

Scanner Motor Gain Adjustment

Adjusts the lens and the mirror unit horizontal stop position at the full size.

Adjusts the lens and mirror unit horizontal stop position at 50%.

Adjusts the lens and the mirror unit horizontal stop position at 200%.

mirror unit. Adjusts the main motor speed.

(Effects all reproduction ratios.) Factory use only.

Adjustment Standards

Magnification

Side to Side Registration

±0.5% (Full Size) ±1% (Enlarge/Reduction)

± 2 mm/0 ± 0.08" (Platen/Full Size)

± 16

± 3

± 16

Change/

Step

0.4 mm

0.3%

-- ----

Enlarge

side

4-16

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

9 SP Adjustment -- 3 (PAGE 4)

Item Function Test Procedure

RDH Motor Adjustment

Item Function Range

RDH Registration Adj.

CFF Registration Adjustment

Adjusts the paper feed motor, transport motor, and inverter motor speed of the document feeder automatically.

Adjusts the original stop position.

Adjust the CF stop position.

± 16

Touch

START

Change/

Step

Moves original

0.75 mm

away from the right scale.

Adjustment Standards

RDH Registration

CFF Registration

+4 mm

−2 mm +3 mm

−1 mm

± 2 mm/0 ± 0.08" (2nd ~ Last-1)

⁄ ⁄

0 0

+0.16′′

(Thin mode)

−0.08′′ +0.12′′

(Thick mode)

−0.04′′

4-17

SERVICE PROGRAM MODE 5 June 1992

10 SP Special Feature -- 1 (PAGE 1 and 2)

Item Function Setting Default

Fusing Lower Temperature Limit: High Mode

A3/11 x 17 Counter ON Mode

Select lower limit temperature to enter idling.

Increment option counter when A3 or 11" x 17" copy is made.

RESET

SET

RESET

SET

159°C (Cover Mode - 169°C) -- LT 169°C (Cover Mode - 169°C) -- A4

169°C (Cover Mode - 189°C) -- LT 174°C (Cover Mode - 189°C) -- A4

Optional counter not connected.

Optional counter connected.

RESET

NOTE: When the high temperature mode in the user tool is set, the lower

limit temperature is increased by as follows: LT version: +20°C A4 version: +15°C

SC Telephone No.

1. Touch .

SC Telephone No.

2. Enter numbers by pressing number key tops. (Touch for hyphen)

3. Touch .

SC Telephone No.

Serial No.

1. Touch .

Serial No.

2. Enter the machine serial number by pressing number key tops.

3. Touch .

Serial No.

Item Function Default Remarks

Tray Priority Select feed station at power

on or after reset.

No Select

Select 2nd tray at .

No Select

4-18

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

10 SP Special Feature -- 2 (PAGE 3)

Item Function Setting Default

Process Control OFF Mode

Fusing Idling Mode

Disable the process control. Enable

Rotates the main motor and development motor for approximately 20 minutes after warm up.

RESET SET

Disable No Yes

RESET

Toner Density Selection

Toner Supply Amount

ID Selection in ADS Mode

Copy Counter Up/Down Mode

A3/11 x 17 Double Count

Selects a voltage shift for ID sensor bias.

Selects how much toner is supplied in detect mode.

Selects a voltage shift of the development bias in ADS Mode.

Selects count up or down. Count up

Counts twice when A3 or 11" x 17" copy is made.

LOW NORMAL HIGH VHIGH

RESET SET

--60 V 0 V +60 V +120 V

+60 V 0 V

--60 V

--120 V

Count down Count once Count twice

HIGH

30%

NORMAL

RESET

4-19

SERVICE PROGRAM MODE 5 June 1992

10 SP Special Feature -- 3 (PAGE 4)

Item Function Setting Default

Magnification Ratio Priority

Selects the magnification when is selected.

Reduce/Enlarge

0.93

Manual ID Level Selection

Select Tray Display in APS

Copy Disable Mode

Test Copy Counter ON

Selects ID level when Auto Image Density is changed to Manual Image Density.

Displays copy trays in APS mode. No

Turns the print key red and disables copying.

Count copy quantity in SP test mode. Counter OFF

RESET SET

Center Preset level

Yes No Yes

Counter ON

RESET

4-20

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

10 SP Special Feature -- 4 (PAGE 5)

Item Function Setting Default

Copy Number to Release Blade Pressure

Data Print I Prints out logging data of

Data Print II Prints out logging data of

Enable Auto Reset Function at Key Counter Removal

Selects the blade release timing after copying jobs.

SP modes 1 to 6.

SP modes 7 to 11.

Automatically resets when key counter is removed.

RESET

SET

Communication Configuration: Mode: Asynchronous Data format: Start bits: 1

Parity check: Even parity Transmission speed: 1200 bps Connector type:

25-pin female connector

RESET SET

15 seconds (100 copies or more)

5 minutes (less than 100 copies)

15 seconds (250 copies or more)

5 minutes (less than 250 copies)

Stop bits: 1 Data bits: 7

Disable Enable

RESET

Connector for printer

Copier Printer RS232C

Pin No. Signal Pin No. Signal

1 FG 1 FG 2 TXD 3 RXD 3 RXD -- -4 CTS -- -5 RTS -- -7 SG 7 SG

4-21

SERVICE PROGRAM MODE 5 June 1992

11 Alarm Level Setting

Item Function Setting Default

Sensor Alarm Level

Jam Alarm Level Select jam ratio for one week to

SC Alarm Level Select SC occurrence ratio for

PM Alarm Set Set PM interval to start RDS PM

Block Alarm Set Set copy quantity to start RDS

Set the output level of electrical volume (sensor) against full value (100%) to start RDS alarm call. Output of each sensor in normal condition is designed to 50%.

start RDS alarm call.

one week to start RDS alarm call.

alarm call.

block alarm call.

LEVEL 1 LEVEL 2 LEVEL 3

1/10,000 copies 1/5,000 copies

1/2,500 copies 1/50,000 copies 1/25,000 copies 1/10,000 copies

LEVEL 2

150

4-22

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

12 Counter Clear

Clear

YES NO

1. Touch beside the counter you wish to clear.

2. Touch to clear the counter.

Clear Yes

4-23

SERVICE PROGRAM MODE 5 June 1992

2.3 SP MODE INDEX

Item

SP Menu

No. Page

Manual

Page

A3/11x17 counter on mode 10 1 4-18 A3/11x17 double count 10 3 4-19 ADS sensor output 7 1 4-8 ADS sensor test 8 1 4-11 Alarm level setting 11 1 4-22 All counters clear 12 1 4-23 Auto drum current adjustment mode 8 3 4-13 Auto reset function at key counter removal 10 5 4-21 Block alarm set 11 2 4-22 Block copy counter 3 2 4-4 Block copy counter clear 12 1 4-23 CFF free run mode 8 2 4-12 CFF original counter 3 2 4-4 CFF registration adjustment 9 4 4-17 Charge cleaner Test 8 1 4-11 Cleaning blade off mode 8 3 4-13 Clutch test 8 1 4-10 Copier jam counter clear 12 1 4-23 Copier operating time 5 1 4-5 Copy counter 3 1 4-4 Copy counter clear 12 1 4-23 Copy counter up/down mode 10 3 4-19 Copy disable mode 10 4 4-20 Copy number to release blade pressure 10 5 4-21 Counter clear 12 1 4-23 Daily copier jam counter 2 1 4-3 Daily copy counter 4 1 4-5 Daily original jam counter 2 2 4-3 Daily peripheral jam counter 2 3 4-3 Daily SC counter 6 8 4-7

4-24

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

Item

SP Menu

No. Page

Manual

Page

Data print 10 5 4-21 Drum conditioning mode 8 2 4-12 Drum potential sensor output 7 1 4-8 Drum potential sensor test 8 1 4-11 Drum temperature 7 1 4-8 Duplex mode copy counter 3 2 4-4 Enable auto reset function at key counter removal 10 5 4-21 Exposure lamp adjustment 9 2 4-15 Exposure lamp heater temperature 7 1 4-8 Exposure lamp on check 8 1 4-11 Exposure sensor output 7 1 4-8 Finisher free run mode 8 2 4-12 Finisher motor test mode 8 2 4-12 Focus adjusment 9 3 4-16 Free run mode - CFF 8 2 4-12 Free run mode (lamp OFF) 8 2 4-12 Free run mode (lamp ON) 8 2 4-12 Free run mode - scanner 8 2 4-12 Front staple position adjustment 9 2 4-15 Fusing idling mode 10 3 4-19 Fusing lower temperature limit: high mode 10 1 4-18 Fusing pressure check mode 8 2 4-12 Fusing temperature 7 1 4-8 Fusing temperature adjustment 9 2 4-15 Horizontal magnification adjustment (200%) 9 3 4-16 Horizontal magnification adjustment (50%) 9 3 4-16 Horizontal magnification adjustment (full size) 9 3 4-16 ID selection in ADS mode 10 3 4-19 ID sensor output 7 1 4-8 ID sensor test 8 1 4-11 Jam alarm level 11 1 4-22

4-25

SERVICE PROGRAM MODE 5 June 1992

Item

SP Menu

No. Page

Manual

Page

Jam counter - Location 1 2 4-2 Jam counter - Original location 1 3 4-2 Jam counter - Original total 1 3 4-2 Jam counter - Paper Size 1 1 4-2 Jam counter - Total 1 1 4-2 Jam detection off mode 8 3 4-13 Leading edge erase adjustment 9 2 4-15 Leading edge registration adjustment 9 2 4-15 Magnification ratio priority 10 4 4-20 Manual ID level selection 10 4 4-20 Operating time 5 1 4-5 Original counter clear 12 1 4-23 Original jam counter clear 12 1 4-23 Paper feed time 7 2 4-8 Paper tray copy counter 3 2 4-4 PM alarm set 11 2 4-22 PM counter clear 12 1 4-23 PM cycle copy counter 3 2 4-4 Power pack output adjustment 9 1 4-15 Power pack output on mode 8 4 4-14 Process control initial setting 8 3 4-13 Process control off mode 10 3 4-19 RDH free run mode 8 2 4-12 RDH motor adjustment 9 4 4-17 RDH original counter 3 2 4-4 RDH registration adjustment 9 4 4-17 Rear staple position adjustment 9 2 4-15 SC alarm level 11 1 4-22 SC counter - ADS 6 2 4-6 SC counter - Counter 6 7 4-7 SC counter - Development 6 3 4-6

4-26

Service

Tables

5 June 1992 SERVICE PROGRAM MODE

Item

SP Menu

No. Page

Manual

Page

SC counter - Drum charge 6 2 4-6 SC counter - Drum discharge 6 3 4-6 SC counter - Drum potential 6 2 4-6 SC counter - Duplex 6 5 4-6 SC counter - Exposure 6 1 4-6 SC counter - Fan motor 6 4 4-6 SC counter - Finisher 6 7 4-7 SC counter - Fusing 6 6 4-6 SC counter - ID sensor 6 2 4-6 SC counter - Image transfer 6 3 4-6 SC counter - Magnification 6 1 4-6 SC counter - Paper feed 6 5 4-6 SC counter - RDH 6 6 4-6 SC counter - Scanner 6 1 4-6 SC counter - Se-drum 6 4 4-6 SC counter - Separation 6 3 4-6 SC counter - total 6 8 4-7 SC counter clear 12 1 4-23 SC detection off mode 8 3 4-13 SC telephone No. 10 1 4-17 Scanner free run mode 8 2 4-12 Scanner motor gain adjustment 9 3 4-16 Select tray display in APS 10 4 4-20 Sensor alarm level 11 1 4-22 Sensor output 7 1 4-8 Sensors test 8 1 4-9 Separation corona on timing adjustment 9 2 4-15 Serial No. 10 1 4-18 Side to side registration adjustment 9 3 4-16 Solenoid test 8 1 4-10 SP adjustment 9 1 4-15

4-27

SERVICE PROGRAM MODE 5 June 1992

Item

SP Menu

No. Page

Manual

Page

SP special features 10 1 4-18 SP test mode 8 1 4-9 Staple position adjustment - front 9 2 4-15 Staple position adjustment - rear 9 2 4-15 Test copy counter clear 12 1 4-23 Test copy counter on 10 4 4-20 Test mode copy counter 3 2 4-4 Toner density selection 10 3 4-19 Toner forced supply mode 8 3 4-13 Toner supply amount 10 3 4-19 Total copies by paper size 3 1 4-4 Total number of copies 3 1 4-4 Total number of SC 6 8 4-7 Total original jams 1 3 4-2 Total paper jams 1 1 4-2 Tray priority 10 2 4-18 User codes/counters clear 12 1 4-23 Vertical magnification adjustment 9 3 4-16 Weekly copier jam counter 2 1 4-3 Weekly copy counter 4 1 4-5 Weekly original jam counter 2 2 4-3 Weekly peripheral jam counter 2 3 4-3 Weekly SC counter 6 8 4-7

4-28

Service

Tables

5 June 1992 DIP SW TABLE

3. DIP SW TABLE

3.3 RDH MAIN CONTROL PCB

DIP 100

1 2 3 4 ON OFF OFF ON Free Run (SW100 - Start/SW101 - Stop) ON ON OFF ON Motor Test (use DIP101 to turn on)

DIP101 Motor

1 Feed Motor 2 Belt Drive Motor 3 Inverter Motor 4 Blower Motor

Function

3.4 RDH LEDs

LED No. Lights when the following sensor is activated.

100 Original set sensor 101 Separator HP sensor 102 Entrance sensor 103 1st transport sensor 104 2nd transport sensor 105 Registration sensor 106 1st inverter sensor 107 2nd inverter sensor 108 Exit sensor 109 Single feed set sensor 110 Single feed exit sensor 111 Inverter entrance sensor 112 Original length sensor 113 Separator sensor 114 Lift sensor 115 Inverter unit cover switch 116 Motor speed -- Middle 117 Motor speed -- High 118 Motor speed -- Low 120 Original height sensor

4-29

PREVENTIVE MAINTENANCE SCHEDULE 5 June 1992

4. PREVENTIVE MAINTENANCE SCHEDULE

4.1 PM TABLE

NOTE: The amounts mentioned in the PM interval are copy numbers.

C: Clean R: Replace L: Lubricate I: Inspect A: Adjustment

EM 150K 300K 450K 600K NOTE

OPTICS

Mirrors, Lens, Reflector

1st and 2nd Scanner Guides

Exposure Glass

C C C C C

Fiber Optics Cable

Exposure Flat Cable I I I I Replace at 3M Exposure Lamp I I I I Replace at 900K Optics Cooling Fan

Filter Mirror Unit Guide Rod

Felt Lens Horizontal Drive

Gear Lens Guide Rod C C C C Dry cloth

C C C C

I, C I, C I, C I, C

Soft cloth

Dry cloth

Water Replace after 1M originals feed

Dry cloth Replace at 3M

Remove dust Replace if necessary

Launa oil; if it’s dry

Mobil Temp 78; if it’s dry

PAPER FEED (for each paper feed station) Pick-up Rollers R R R R Copy numbers are for each Paper Feed Rollers R R R R Separation Roller Paper Feed Sensors C C C C Blower brush Paper Feed Guides C C C C Dry cloth Relay Rollers C C C C Water Tray Drive Worm

Gears Drive Gears L Mobil Temp 78; if it’s dry 2nd Tray Drive Chain A Adjust chain tension Registration Roller C Water Paper Dust Cleaning

Roller Paper Dust Pan Replace at 1.2M Transport Belt/Unit C C C C Water

AROUND THE DRUM

R R R R

paper feed station. Replace the rollers as a set.

Mobil Temp 78; if it’s dry

Replace at 1.2M

4-30

Service

Tables

5 June 1992 PREVENTIVE MAINTENANCE SCHEDULE

EM 150K 300K 450K 600K NOTE Drum C C C C Water/Dry cloth Corona Wires R R R R Wire Cleaner Pads R R R R Toner Filter R R R R Ozone Filter Replace at 1.2M Corona Casing C C C C Water/Alcohol Potential Sensor and

Drum Thermistor Charge Corona Unit

Brush Seal Erase Lamp C C C C Water ID Sensor C C C C Water QL Filter C C C C Water Pick-off Pawls C C C C Alcohol

CLEANING UNIT

Cleaning Blade R R R R Apply setting powder Flick Blade R R R R Apply setting powder Cleaning Brush R R R R Entrance Seal I, C I, C I, C I, C Side Seals I, C I, C I, C I, C Replace if damaged Cleaning Filter I, C I, C I, C I, C Replace if damaged Cleaning Unit Inside C C C C Remove toner

C C C C

Dry cloth/Blower brush

DEVELOPMENT UNIT

Developer R R Upper Seal C C C C Side Seals I I I R Toner Cartridge Seals I I I I Replace if necessary Sleeve Drive Gears C C C R Do not use any grease Timing Belt Pulley C C C C Toner Near End

Sensor Feeler Development Filter R R R R Development Duct

Filter

FUSING UNIT

Hot Roller R R Hot Roller Bushing I R I R Hot Roller Bearing I R I R Pressure Roller R Pressure Roller

Bushing

I I I I

R R R R

I I I R

Check movement

4-31

PREVENTIVE MAINTENANCE SCHEDULE 5 June 1992

EM 150K 300K 450K 600K NOTE Pressure Roller

Bearing

I I I R

Oil Supply Roller R R R R Oil Supply Roller

Bushing Stripper Pawls

C C C C

I, C I, C I, C I, C

Suitable solvent

Replace if damaged Fusing Drive Gears L Mobil Temp 78 Guide Plates C C C C Suitable solvent De-curling Belt C C C C Alcohol De-curling Roller C C C C Suitable solvent Fusing Transport

Rollers

C C C C

Suitable solvent (Resin rollers)

Alcohol (Rubber rollers)

DUPLEX (for duplex copies) Pick-up Roller C R C R Clean with water Paper Feed Roller R R R R Replace as a set Separation Roller R R R R Anti-static Brushes C C C C

RDH (for original) Feed-in Belts C Alcohol Transport Belt C C C R Alcohol or belt cleaner Sensor Pads C C C C Blower brush Feed and Transport

Rollers Inverter and Exit

Rollers

Alcohol

Right Turn Rollers C Alcohol

4-32

Service

Tables

5 June 1992 PREVENTIVE MAINTENANCE SCHEDULE

4.2 REGULAR PM SCHEDULE

1. Make A Copy and Remove the Developer (every 150K)

1. Make a copy of OS-UA3 test chart at manual image density level 4.

2. Remove the developer.

3. Unplug the copier and 2nd sorter stapler.

2. Optics (every 150K)

1. Clean the mirrors, lens, and reflector by using a soft cloth.

2. Clean the exposure glass with water.

3. Clean 1st and 2nd scanner guides with a dry cloth.

4. Clean the lens guide rods with a dry cloth.

5. Clean the fiber optics cable ends with dry cloth.

6. Clean the optics cooling fan filter. Replace it if necessary.

7. Inspect the exposure flat cable if there is any damage.

8. Inspect the exposure lamp if it has dark spots. Every 900K

1. Replace the exposure lamp.

Every 3M

1. Replace the fiber optics cable and the flat cable.

Every 1M originals

1. Replace the exposure glass.

3. Paper Feed (every 150K for each feed station)

1. Clean the paper feed sensor of each feed station using a dry cloth or a blower brush.

2. Clean the paper feed guide of each feed station using a dry cloth.

3. Clean the relay rollers, the transport belts, and the transport unit using water.

4. Replace the pick-up, paper feed, and separation rollers of each feed station.

4-33

PREVENTIVE MAINTENANCE SCHEDULE 5 June 1992

Every 600K

1. Clean the registration roller using water.

2. Adjust the 2nd tray drive chain tension.

Every 1.2M

1. Replace the paper dust cleaning roller and the dust pan.

4. Duplex Unit (every 150K duplex copies)

1. Clean the pick-up roller using water.

2. Clean the anti-static brushes.

3. Replace the paper feed and separation rollers. Every 300K duplex copies

1. Replace the pick-up roller.

5. RDH (every 150K originals)

1. Clean the sensor pads using the blower brush.

2. Clean the transport belt using the belt cleaner or alcohol. Every 600K originals

1. Replace the transport belt.

2. Clean the feed-in belt, feed rollers, transport rollers, inverter rollers, and exit rollers using alcohol.

6. Around The Drum (every 150K)

1. Clean the casing of the charge, T & S, and Pre-transfer corona units. Use water first and then use alcohol.

2. Replace the corona wires and the wire cleaner pads.

3. Clean the charge corona unit brush seal.

4. Replace the toner filter.

5. Clean the drum potential sensor and the drum thermistor using a dry cloth or blower brush.

6. Clean the erase lamp, the QL filter, and the ID sensor using water.

4-34

Service

Tables

5 June 1992 PREVENTIVE MAINTENANCE SCHEDULE

7. Clean the pick-off pawls with alcohol.

8. Clean the drum surface using water. Then, use dry cloth.

Every 1.2M

1. Replace the ozone filter.

7. Cleaning Unit (every 150K)

1. Clean the unit inside.

2. Clean and inspect the entrance seal, the side seals, and the cleaning filter.

3. Replace the cleaning blade, the flick blade, and the cleaning brush.

8. Development Unit (every 150K)

1. Clean the upper seal, the sleeve drive gear, and the timing belt pulley.

2. Inspect the toner cartridge seals, the sleeve side seals, and toner near end sensor feeler movement.

3. Replace the development filter, and the duct filter.

Every 300K

1. Replace the developer.

Every 300K

1. Replace the sleeve side seals and the sleeve drive gears.

9. Fusing Unit (every 150K)

1. Inspect the bushings and bearings for the hot and pressure rollers.

2. Inspect and clean the stripper pawls using a suitable solvent.

3. Clean the guide plates, the de-curling roller, and resin transport rollers using a suitable solvent.

4. Clean the de-curing belt and the rubber transport rollers using alcohol.

5. Clean the oil supply roller bushings using the suitable solvent.

6. Replace the oil supply roller.

4-35

PREVENTIVE MAINTENANCE SCHEDULE 5 June 1992

Every 300K

1. Replace the hot roller together with the bushings and the bearings.

Every 600K

1. Replace the pressure roller together with the bushings and the bearings.

4-36

SECTION 5

REPLACEMENT

AND

ADJUSTMENT

5 June 1992 RDH

13. RDH

13.1 TRANSPORT BELT REPLACEMENT

[B]

[H]

[E]

[A]

[C]

[F]

1. Release the belt unit [A] by sliding the belt release lever [B] to the right.

2. Loosen the screw [C] and slide the lever [D] supporting the left transport belt unit [E] to the right.

3. Remove the support guide plate [F] (2 screws).

4. Fold down the transport belt to the release position, and replace the transport belt [G].

NOTE: When replacing the transport belt, make sure the transport belt is

positioned under the ribs [H].

[D]

[H]

[G]

Adjustment

Replacement

5-1

RDH 5 June 1992

13.2 FEED-IN BELT REPLACEMENT

[G]

[H]

[F]

[A]

[B]

[E]

[D]

[J]

[I]

[C]

[G]

NOTE: Take care not to damage the harnesses [A] of the original table by

pulling roughly. The side-to-side registration of the paper stack mode is required after removing and reinstalling the original table. Before removing, mark the position of the original table position to allow easier reassembling.

1. Remove the RDH front cover [B] (6 screws).

2. Disconnect the 3 connectors [C] and remove the original table [D] (4 screws), otherwise the harnesses could be damaged.

3. Disconnect the drive shaft joint [E] (2 allen screws).

4. Remove the feed-in belt unit [F] (4 screws and 2 connectors [G]).

5. Replace the feed-in belts [H]. NOTE: • The shiny side of the feed-in belts should face out.

• When reassembling, pass the 3p connector through the hole [I]

and the 6p and 9p connectors through the slit [J].

5-2

5 June 1992 RDH

13.3 SIDE-TO-SIDE REGISTRATION ADJUSTMENT

[A]

1. Set an original on the original table and make a copy in the stack feed mode.

2. Measure the difference of the side-to-side registration between the copy and original.

3. If the value does not match the standard, loosen the 4 screws [A] to change the original table position. Then, tighten the screws.

4. Make continuous copies to check the variation. If the variation does not match the standard, repeat the above step.

Adjustment

Replacement

5-3

RDH 5 June 1992

13.4 ORIGINAL HEIGHT SENSOR POSITION ADJUSTMENT

Adjustment standard: LED120 20 sheets on, 10 sheets off

[A]

[B]

1. Remove the RDH rear cover and front side fence [A] (2 screws).

2. Loosen the screw [B] and adjust the height of the original height sensor so that LED 120 on the RDH main control PCB turns on when 20 sheets of paper is placed, and turns off when 10 sheets of paper is placed, on the original table.

5-4

5 June 1992 RDH

13.5 RDH UNIT REMOVAL

[E]

[B]

[D] [F]

[F]

[C]

[A]

CAUTION: Take care not to injure yourself by dropping the RDH unit

during this procedure.

1. Remove the copier left rear and right rear covers.

2. Remove the upper rear cover [A] (3 screws) and rear cover [B] (1 screw) of single feed table.

3. Remove the RDH unit stoppers [C] (3 screws each).

4. Remove the screw [D] connecting the ground wire.

5. Remove the RDH unit [E] (8 screws and 4 connectors [F]).

Adjustment

Replacement

5-5

RDH 5 June 1992

13.6 SINGLE FEED TABLE REMOVAL

[A]

[B]

[C]

1. Remove the front [A] and rear [B] single feed table covers (1 screw each).

2. Remove the single feed table [C] (3 screws and 2 connectors).

5-6

5 June 1992 RDH

13.7 SINGLE FEED SET SENSOR AND REGISTRATION

SENSOR REPLACEMENT

[D]

[A]

[C]

[B]

13.7.1 Preparation

1. Remove the front cover and rear cover [A] (8 screws).

2. Loosen the screw [B] from the original length sensor bracket [C].

3. Remove the original end fence unit [D] (8 screws).

Adjustment

Replacement

5-7

RDH 5 June 1992

[D]

[C]

[B]

[E]

[A]

[G]

[F]

[E]

[H]

13.7.2 Single Feed Set Sensor Replacement

1. Remove the scale [A] (4 screws and 1 connector).

2. Replace the single feed set sensor [B] (1 screw).

13.7.3 Registration Sensor Replacement

1. Remove the right stay supporter [C] and right turn guide [D] (4 screws each).

2. Remove the 5 screws [E] from the registration right guide [F] and release the belt unit [G]. Then, slide the registration right guide to the left.

3. Replace the registration sensor [H] (1 screw and 1 connector).

5-8

5 June 1992 RDH

13.8 VACUUM SHUTTER SOLENOID ADJUSTMENT

0.5 mm

[A]

[B]

[C]

1. Remove the feed-in belt unit.

2. Loosen the 2 screws [A].

3. Maintain the 0.5 mm gap (as shown) and adjust the solenoid bracket position so that the shutter [B] closes completely when the plunger [C] is pushed in the solenoid. Then, re-tighten the 2 screws.

Adjustment

Replacement

5-9

RDH 5 June 1992

13.9 EXIT ROLLER SOLENOID ADJUSTMENT

[A]

[B]

[C]

[D]

0.5 mm

1. Remove the front cover.

2. Loosen the 2 screws [A].

3. Maintain the 0.5 mm gap (as shown) and adjust the solenoid bracket position so that the arm [B] is parallel to the bracket [C] when the plunger [D] is pushed in the solenoid. Then, re-tighten the 2 screws.

5-10

5 June 1992 RDH

13.10 INVERTER BLOWER MOTOR BELT TENSION

ADJUSTMENT

Adjustment standard: 450 ± 50 g

450 ± 50 g

[A]

1. Remove the RDH rear cover.

2. Loosen the screw [A] from belt tightener.

3. Adjust belt tightener using a tension gauge as shown.

5-11

Adjustment

Replacement

RDH 5 June 1992

13.11 BELT DRIVE, FEED, AND INVERTER BLOWER MOTOR

TENSION ADJUSTMENT

Adjustment standard: 750 ± 50 g

[A]

1. Loosen the 4 screws [A] from each motor bracket.

2. Adjust motor tension using a tension gauge as shown.

5-12

SECTION 6

TROUBLESHOOTING

5 June 1992 SYSTEM ERROR AND SERVICE CALL CONDITIONS

1. SYSTEM ERROR AND SERVICE CALL CONDITIONS

SC700 - RDH Feed Motor Overload Definition:

The RDH main control PCB cannot detect any pulses from the feed motor encoder within 50 msec after the feed motor is activated.

Points to check:

• Mechanical interference with the feed motor

• Feed motor

• Fuse 102 on the RDH main control PCB

• RDH main control PCB

SC701 - RDH Belt Drive Motor Overload Definition:

The RDH main control PCB cannot detect any pulses from the belt drive motor encoder within 50 msec after the belt drive motor is activated.

Points to check:

• Mechanical interference with the belt drive motor

• Belt drive motor

• Fuse 104 on the RDH main control PCB

• RDH main control PCB

SC702 - RDH Inverter Motor Overload Definition:

The RDH main control PCB cannot detect any pulses from the inverter motor encoder within 50 msec after the inverter motor is activated.

Points to check:

• Mechanical interference with the inverter motor

• Inverter motor

• Fuse 103 on the RDH main control PCB

• RDH main control PCB

Trouble-

shooting

6-1

SYSTEM ERROR AND SERVICE CALL CONDITIONS 5 June 1992

SC720 - Finisher Transport Drive Motor Overload Definition:

The finisher transport drive motor control PCB cannot detect any pulses from the transport drive motor when it is activated.

Points to check:

• Mechanical interference with the transport drive motor

• Transport drive motor

• Transport drive motor control PCB

• Fuse 1 on the transport drive motor control PCB

• Finisher main control PCB

SC721 - Finisher Shift Motor Overload Definition:

The finisher main control PCB cannot detect the shift tray half turn sensor signal within 1.25 seconds after the shift motor is activated.

Points to check:

• Mechanical interference with the shift motor

• Shift tray half turn sensor

• Shift motor

• Finisher main control PCB

SC722 - Finisher Shift Tray Lift Motor Overload Definition:

The finisher main control PCB cannot detect the stack height limit sensor signal within 13 seconds after the shift tray lift operation is started.

Points to check:

• Mechanical interference with the shift tray lift motor

• Shift tray lift motor

• Stack height limit sensor

• Finisher main control PCB

6-2

5 June 1992 SYSTEM ERROR AND SERVICE CALL CONDITIONS

SC723 - Finisher Jogger Motor Overload Definition:

The jogger home position sensor remains actuated after the jogger fences move inwards, or the jogger home position sensor is not actuated within 1 second after the jogger fences start to move outwards.

Points to check:

• Mechanical interference with the jogger motor

• Jogger motor

• Jogger home position sensor

• Jogger drive belt

• Finisher main control PCB

SC725 - Finisher Stapler Drive Motor Overload Definition:

The stapler unit home position sensor remains actuated after the stapler unit moves to rear, or the stapler unit home position sensor is not actuated within 5 seconds after the stapler unit starts to return.

Points to check:

• Mechanical interference with the stapler drive motor

• Stapler drive motor

• Stapler unit home position sensor

• Stapler drive belt

• Finisher main control PCB

SC741 - Finisher Stack Feed-out Motor Overload Definition:

The finisher main control PCB cannot detect any pulses from the stack feed-out motor encoder when the motor is activated.

Points to check:

• Mechanical interference with the stack feed-out motor

• Stack feed-out motor

• Finisher main control PCB

Trouble-

shooting

6-3

SYSTEM ERROR AND SERVICE CALL CONDITIONS 5 June 1992

SC742 - Finisher Staple Hammer Home Position Sensor Failure Definition:

The finisher main control PCB cannot detect the staple hammer home position sensor signal within 0.6 seconds after the staple motor is activated.

Points to check:

• Mechanical interference with the staple motor

• Staple hammer home position sensor

• Staple motor

• Finisher main control PCB

SC743 - Finisher Exit Drive Motor Overload Definition:

The finisher main control PCB cannot detect any pulses from the exit drive motor encoder when the exit drive motor is activated.

Points to check:

• Mechanical interference with the exit drive motor

• Exit drive motor

• Finisher main control PCB

SC745 - Finisher Exit Unit Lift Motor Overload Definition:

The finisher main control PCB cannot detect the exit unit half turn sensor signal within 3.6 seconds after the exit unit lift motor is activated.

Points to check:

• Mechanical interference with the exit unit lift motor

• Exit unit lift motor

• Exit unit half turn sensor

• Finisher main control PCB

6-4

Ricoh FT8880 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual