Ricoh FT 4490 Service Manual

VARIABLE RESISTORS

Circuit diagrams&Service manuals

Main Board

1.

31 January ’89

Number
VR147

VR148
VR201
VR202

2. Lamp Regulator

Number

VR1
VR2
VR3

3.

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

1.

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

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

1.

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

2.

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

3.

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

4.

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

5.

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

6.

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

7.

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

ON

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

--

--

--

--

o

o

o

o

o

o

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.

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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