Ricoh FT 4490 Service Manual

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Page 1

VARIABLE RESISTORS

Circuit diagrams&Service manuals

Main Board

31 January ’89

Number VR147

VR148 VR201 VR202

2. Lamp Regulator

Number

VR1 VR2 VR3

DF Main Board

Number

VR101 VR103

VR104

VR105

Function

Adjusts

Adjusts the OL (original length) sensor voltage Adjusts the ID (image density) sensor voltage Adjusts the AD (auto density) sensor voltage

the OW (original width) sensor voltage

Function

Light adjustment Factory Use Factory Use

Function

Belt drive motor speed adjustment Original entrance sensor output

(IC 116-5> + 8V : With paper) (IC 116-5< + 4V : Without paper)

Original width sensor output

(IC 116-7> + 8V : With paper) (IC 116-7< + 4V : Without paper)

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31 January ’89

DIP SWITCHES

Operation Panel

DIP SW 1-1

DIP Switch

1-1 1-2 1-3 1-4 1-5 1-6 1-7

1-8

Normai

OFF OFF OFF OFF OFF OFF OFF

OFF

2. DF Main Board

DIP SW 101

101-1 101-2 101-3 101-4

ON OFF

OFF OFF OFF

OFF ON ON ON OFF ON ON ON ON ON

Function

Drum conditioning Free run Jam detection disable Sorter instructions Beeper sound disable Oil end check off Manual image density mode priority

(ON: manual mode, OFF: ADS mode)

SP Mode

Function

Normal mode Free run Belt speed adjustment (VR103) All indicators on

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31 January ’89

SERVICE PROGRAM MODE (SP MODE) OPERATION

The service program mode is used to check and change electrical data or

adjustment values.

1. Data Change Mode

Remove the DIP SW cover and turn on DIP SWI -8 on the operation panel. (The Service Call indicator will start blinking.)

Enter the desired SP Mode number using the numeral keys. (The entered

number is displayed in the copy counter.) Press the Enter key. (The SP Mode number is shifted into the Magnifica-

tion indicator and the actual data is displayed in the copy counter.)

If the data is correct, press the Enter key. Enter the desired data using numeral keys, (The data entered is displayed

in the copy counter. ) Press the Enter key to place the new data in memory.

Turn off DIP SW1 -8. (The Service Call indicator goes off.)

2. Data Check Mode

1. Perform steps 1 and 2 of the data change mode.

2. Press the Enter key. (The data is displayed in the Magnification indicator.)

3. Regarding SP Modes (#5, #9, #10, #50, #54 #55, #56, #57, #60),

please refer to the following table.

4. Turn off DIP SW1 -8.

NOTE: When the machine does not receive any data, press the Clear Mode

key or turn off the main switch. The Zoom key can be used to increment or decrement the SP Mode

number.

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31 January ’89

SERVICE PROGRAM MODE TABLE

Mode No. Function

5 Exposure

Lamp OFF Free Run key to start free run. 1: Lamp

9 Exposure

Lamp Output

10 Drum Con-

ditioning

11 All Indicators

ON on the operation panel.

15 Auto Reset

Time

16 Count

Up/Down

17 Auto Cas-

sette Shift

20 Feed Station

Priority (LCT)

21 APS Priority

22 Feed Station

Priority (1st, 2nd, 3rd cassette)

Free run with exposure lamp. Press the Start

Press the C/S key to stop free run.

Turns on the exposure lamp and the main rotates to turn the exmotor for about 10 seconds. When checking the Enter”1” and then press lamp voltage, CN3 on the Enter key to turn on the exposure lamp. board is used with this Press the C/S key to turn off the lamp.

Used to condition a new drum. “99” will appear in the copy counter. Press the Start key to activate.

Turns on all indicators

Turn off the main switch, or, turn off DIP SW1 -8 to stop.

Selects auto reset of 1 or 3 minutes.

Selects count up or count down.

Selects Auto-CassetteO: ON Shift mode. 1: OFF

Selects feed station priority.

Selects APS or manual.

Selects feed station priority.

Factory

Data

Setting

O: Lamp

OFF turning off DIP SW1 -8

0:1 min. 1:3 min. 2: None

o: up

1: Down

O: LCT 1:

Cassette

O: APS 1: Manual

o: 1st 1: 2nd 2: 3rd

Remarks

This mode is also cleared by turnlng off main switch, or, by

The main motor also

posure lamp on.

the lamp regulator

mode.

This function is the same as Dip SW1 -1.

Refer to NOTE 1.

Copier automatically shifts to another cassette holding the same size paper when paper runs out.

If DF is installed, APS mode is selected when an original is placed on the DF.

Refer to Note 2.

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31 January ’89

Mode No.

23 DF Original

Size

24 SADF Shut-

off Time

28 Auto Sort

Mode

29 Fusing Unit

Idle

30 Toner Suppiy

Mode mode.

31 Toner Suppiy

Amount toner is supplied in 1: 15%

(Detect

Mode A) 3: 60%

32 Toner Supply

Amount toner is supplied in

(Fixed Mode)

33 ID Sensor

Bias

34 Toner Supply

Amount

(Detect

Mode B)

35 Toner Supply

38 Edge Erase

Function

Enables originals of various sizes to be fed from the same stack.

Selects the shut-off time for SADF mode.

Sorl mode is automatitally selected when more than 2 originals are set on the DF original table and the entered quantity i greater than 2.

Selects fusing unit id- 0: No id- 0 ling mode.

Selects toner suppiy

Determines how much o: 30%

detect mode A.

Determines how much

fixed mode.

Sets the bias voltage applied to the bias roller 1: 440V when sensing image 2: 500V density.

Determines how much toner is supplied in detect mode B.

Changes toner supply interval. a) ID sensor checks

every 5 copies.

b) Toner end level

changes to 0.65V.

Sets the width of mar- 0: 10mm gin erase.

Factory

Data

Setting

: OFF

1:ON

0:4s

1:60s

0: Manual

1: Auto

ling

1: idling

O: Detect

1: Fixed

2: Detect A

2: 45%

o: 7%

1:3.5% 2: 10.5% 3: 14%

0: 470V

3: 530V o: 2%

1: 4%

Standard copies, 0.75V.

increase

1: 5mm 2: 15mm 3: 20mm

Remarks

ADF Mode only.

Sorter and DF must be installed.

Copier will idle for 10 seconds. Refer to NOTE 3.

47oV = Normal 44oV = Lighter 500V

= Darker

530V = Darkest

Standard: Every 10

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31 January ’89

Mode No.

39 Center Erase

41 Lead Edge

Erase Margin Adjustment

42 Registration

Adjustment

43 Vertical Mag-

nification Adjustment

44 Horizontal

Magnification perpendicular to the Adjustment

46 Size Detec-

tion Error

. Correction

49 Fusing

Temperature Change

50 Original

Length Detec- detected by the size Enter key after entertion Check

52 Fusing

Temperature temperature.

53 Drum

Temperature temperature.

54 Vsg Adjust-

ment

55 VSG, VSP

Voltage

Function

Sets the width of center

erase. 1: 10mm

Adjusts the lead edge margin. mm)

Adjusts registration.

Adjusts magnification in the paper travel direction.

Adjusts magnification

direction of paper travel. Corrects size detection.

Changes fusing temperature.

Displays the length

detection circuit.

Displays the fusing

Displays the drum

Turns on the ID sensor LED

Displays VSG and VSP voltage. This mode is used with drum conditioning is displayed while holdmode. ing the Enter key.

O: 20mm

2: 15mm 3: 25mm

0-15

Standard

1: Low

Higher

3: Highest

Data

Factory Setting

8 (3,5

8 (Omm)

8 (0%)

8 (Omm)

Remarks

1 mm per step + 10.5 mm to –4.5mm

1 mm per step

+ 7mm to -8mm

0.2% per step + 1.4% to –1 .6%

1 mm per step

-7mm to + 8mm

When pressing the

ing “50”, the original length is detected automatically.

The PTL and QL turns on, and the drum rotates for about 30 seconds. The Vsg voltage is also displayed in the magnification indicator.

When the machine is detecting the ID sensor output voltage the Vsp

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31 January ’89

Mode No.

56 ADS Input

Function

Displays ADS voltage. Reference Press the Start key to Voltage

turn on. Press the

C/S key to

stop.

57 APS Sensors

Check operation of fiber Voltage Ad- optics sensors. justment

Standard original,

Press the Start key to

turn on.

Press the C/S key to stop.

58 Bias Up

Increases the bias volt(Black age Development

59 Bias Voltage

)

Displays the bias volt-

age

60 Toner Suppl

Recovery the Vsp is above 0.5V.

y Recover toner volume if

a) Press Start key.

b) Toner supply clutch

turns on. c) Free run starts. d) Vsp becomes less

than 0.5V.

e) Free run stops.

66 Original

Check is an original left on the

Copier detects if there

exposure glass by a

70 Color Toner

supply

user when using the D Selects the color toner

suppiy ratio.

Amount 2: 21%

72 Bias OFF

Turns off the bias ac- 0: OFF cording to the length of the lead edge erase

margin.

Data

Standard

1: 90V up

0: ON

1 : OFF

0 : 14%

1 : 7%

3:28% 4: 35% 5: 42% 6: 49% 7: 56%

1: ON

Factory Setting

Remarks

Refer to the ADS adjustment procedure.

Press the Enter key to display the voltage of the length sensor.

Press the Start key to

indicate the voltage. This does not include the temperature com-

pensation.

Use this mode if the

image density is low.

(Black toner only).

Refer to NOTE 4 on

color toner.

if the copier detects

the orlginal, the jam in-

dicator turns on.

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31 January ’89

Mode No. Function

Data

Factory Setting

Remarks

73 Color Toner

Copy Count color copies made.

75 ID Sensor

Bias (Color plied to the bias roller

Shows the number of 0: Red 0 Multiply number by

Sets the bias voltage ap-

1: Green 2: Blue

0: 590V 0

1: 620V

100. Example: 24 =

2400

sheets

590V = Normal 620V = Darker

Toner) when sensing image

density.

76 Sorter Bin

Capacity

86 PM Counter

Sets the stack mode 0: No 0 quantity limit.

Turns on the PM 0: OFF

counter.

87 PM Copy

Sets the interval of the 0: 80K

Count PM counter.

limit

1: Limit

l:ON

1: 60K

Limit is determined by

the paper size. Refer to

NOTE 5. For PB machines, “O” Is

ON “1 “ iS OFF.

2: 120K

88 PM Counter

Displays the PM

When the PM count is

Check counter. exceeded, the Service

Call and Key Counter indicators blink.

89 PM Counter

Reset

93 Maximum

Resets the PM counter.

Limits the maximum

Use after performing PM.

The limit quantity is dis-

0 Copy Quan- copy quantity that can (999) played in the copy tity

97 Clear Jam

Counter

98 Clear All

be entered.

Clears all jam and ser-

vice call counters.

Enter”1”, then press the Enter key to clear the touters.

Clears all counters and

counter. (Refer to

6.)

NOTE

DIP

SW1 -1

Clear the following Counters:

● SC Counters

● Jam Counters

DIP SW1 -1 must be on.

must be on.

Counters returns modes which Clear the following

factory setting is “O” Counters: back to “O”.

● SC Counters

Enter”1”, then press the Enter key to clear the counters.

99 Clear All

Clears all counters and

DIP SW1-1 must be on.

Memory returns all modes to fac-

tory setting. Enter”1”, then press the Enter key to clear the memory.

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Mode No. Function

Data

Factory Setting

Remarks

January ’89

120 Total Service Displays the total num-

Call

121 Service Call - Displays the total num-

optics

122 Service Call - Displays the total num-

Exposure Lamp

123 Service Call - Displays the total num-

Drive Section ber of service calls of

124 Service Call - Displays the total num-

Fusing Unit

125 Service Call - Displays the total num-

Data Transmission

130 Paper Jams Displays the total num-

131 Feed Jams Displays the total num-

132 Fusing Jams Displays the total num-

138 Sorter Jams Displays the total num-

139 DF Jams Displays the total num-

ber of times that the service call indicator has turned on.

ber of service tails of the optics section.

ber of service calls of, the exposure lamp.

the drive section.

ber of service cals of the fusing unit.

ber of service calls of the data transmission.

ber of paper jams.

ber of entrance area paper jams.

ber of fusing unit jams.

ber of sorter jams.

ber of DF jams.

NOTE 7

SC21 , SC23, SC24, SC28, SC29, SC2A, SC2B, SC2C, SC2D NOTE 7

NOTE 7

SC31 , SC32, SC41 ,

SC61 , SC91

NOTE 7

SC53, SC54, SC55,

SC56

NOTE 7

SC93 NOTE 7

NOTE 7

. .

NOTE 7

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January ’89

NOTE 1:

For sales demonstrations and/or installation, you can access the SP mode by the following procedure. However, this can only be used for SP Mode #1 O and #11 (without

1. Press the Clear Mode key.

2. Press

using DIP SW1 -8).

the C/S key, then press the Enter key.

3. Enter”1 O“ or”1 1” using the numeral keys.

4. Press the Enter key. To clear this mode, press the Clear Mode key.

NOTE 2: SP Mode No.20 and 22

Feed Station Priority

the next priority.

NOTE 3: SP Mode No.29

The idling mode may be necessary if the copier has been installed in

environment with low temperature conditions. The idling mode will warm up the fusing rollers enough to ensure fusing at the initial copy run.

Idling Mode: The copier will idle for 10 seconds when the Start key is

pressed for the first time after the main switch is turned on.

NOTE: Idling will not be performed if the machine’s temperature is more

than 150°C when the main switch is turned on.

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January ’89

NOTE 4: SP Mode No.60

For the color toner supply recovery, the following procedure is required:

1. Turn off the main switch and turn on DIP switch 1-2.

2. Turn on the main switch, then press the Start key.

3. While pressing the enter key and the “O” key, the toner supply clutch turns

on.

4. Press the Clear/Stop key and turn off the main switch, then turn off DIP switch 1-2.

NOTE 5: SP Mode No.76

Paper Size

A3/DLT

Limit Capacity

10 sheets A4/LT 30 sheets A5/HLT 30 sheets

NOTE 6: SP Mode No.93

To change the limit quantity, perform the following:

1. Turn DIP SW1-8 on.

2. Enter “93” using the numeral keys.

3. Press the Enter key.

4. Enter the desired number using the numeral keys.

5. Press the Enter key.

NOTE 7:

The first 3 digits are shown in the magnification indicator.

Press the point (“ . “) key to display the second 3 digits.

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