Service Manuals, User Guides, Schematic Diagrams or docs for : ricoh Copiers FT 4490 ft4490sp

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Circuit diagrams&Service manuals
31 January '89

VARIABLE RESISTORS
1. Main Board

Number Function

VR147 Adjusts the OW (original width) sensor voltage
VR148 Adjusts the OL (original length) sensor voltage
VR201 Adjusts the ID (image density) sensor voltage
VR202 Adjusts the AD (auto density) sensor voltage

2. Lamp Regulator

Number Function

VR1 Light adjustment
VR2 Factory Use
VR3 Factory Use

3. DF Main Board

Number Function

VR101
VR103 Belt drive motor speed adjustment

VR104 Original entrance sensor output
(IC 116-5> + 8V : With paper)
(IC 116-5< + 4V : Without paper)
VR105 Original width sensor output
(IC 116-7> + 8V : With paper)
(IC 116-7< + 4V : Without paper)

4-5
31 January '89

DIP SWITCHES
1. Operation Panel

DIP SW 1-1

DIP Switch Normai Function

1-1 OFF Drum conditioning
1-2 OFF Free run
1-3 OFF Jam detection disable
1-4 OFF Sorter instructions
1-5 OFF Beeper sound disable
1-6 OFF Oil end check off
1-7 OFF Manual image density mode priority
(ON: manual mode, OFF: ADS mode)
1-8 OFF SP Mode

2. DF Main Board

DIP SW 101

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

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

4-6
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.)
2. Enter the desired SP Mode number using the numeral keys. (The entered
number is displayed in the copy counter.)
3. 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.)
4. If the data is correct, press the Enter key.
5. Enter the desired data using numeral keys, (The data entered is displayed
in the copy counter. )
6. Press the Enter key to place the new data in memory.
7. 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.

4-7
31 January '89

SERVICE PROGRAM MODE TABLE

Factory
Mode No. Function Data Remarks
Setting

5 Exposure Free run with exposure O: Lamp -- This mode is also
Lamp OFF lamp. Press the Start ON cleared by turnlng off
Free Run key to start free run. 1: Lamp main switch, or, by
Press the C/S key to OFF turning off DIP SW1 -8
stop free run.
9 Exposure Turns on the exposure -- -- The main motor also
Lamp Output lamp and the main rotates to turn the ex-
motor for about 10 posure lamp on.
seconds. When checking the
Enter"1" and then press lamp voltage, CN3 on
the Enter key to turn on the lamp regulator
the exposure lamp. board is used with this
Press the C/S key to mode.
turn off the lamp.
10 Drum Con- Used to condition a -- -- This function is the
ditioning new drum. same as Dip SW1 -1.
"99" will appear in the Refer to NOTE 1.
copy counter. Press the
Start key to activate.
11 All Indicators Turns on all indicators -- -- Refer to NOTE 1.
ON on the operation panel.
Turn off the main
switch, or, turn off DIP
SW1 -8 to stop.
15 Auto Reset Selects auto reset of 1 0:1 min. o
Time or 3 minutes. 1:3 min.
2: None
16 Count Selects count up or o: up o
Up/Down count down. 1: Down
17 Auto Cas- Selects Auto-Cassette O: ON o Copier automatically
sette Shift Shift mode. 1: OFF shifts to another cas-
sette holding the same
size paper when paper
runs out.
20 Feed Station Selects feed station O: LCT o
Priority (LCT) priority. 1:
Cassette
21 APS Priority Selects APS or manual. O: APS o If DF is installed, APS
1: Manual mode is selected when
an original is placed on
the DF.
22 Feed Station Selects feed station o: 1st o Refer to Note 2.
Priority (1st, priority. 1: 2nd
2nd, 3rd cas- 2: 3rd
sette)

4-8
31 January '89

Factory
Mode No. Function Data Remarks
Setting

23 DF Original Enables originals of O:OFF o ADF Mode only.
Size various sizes to be fed 1:ON
from the same stack.
24 SADF Shut- Selects the shut-off time 0:4s o
off Time for SADF mode. 1:60s
28 Auto Sort Sorl mode is automati- 0: Manual o Sorter and DF must be
Mode tally selected when 1: Auto installed.
more than 2 originals
are set on the DF
original table and the
entered quantity iS
greater than 2.
29 Fusing Unit Selects fusing unit id- 0: No id- 0 Copier will idle for 10
Idle ling mode. ling seconds. Refer to
1: idling NOTE 3.
30 Toner Suppiy Selects toner suppiy O: Detect o
Mode mode. B
1: Fixed
2: Detect A
31 Toner Suppiy Determines how much o: 30% o
Amount toner is supplied in 1: 15%
(Detect detect mode A. 2: 45%
Mode A) 3: 60%
32 Toner Supply Determines how much o: 7% o
Amount toner is supplied in 1:3.5%
(Fixed Mode) fixed mode. 2: 10.5%
3: 14%
33 ID Sensor Sets the bias voltage ap- 0: 470V o 47oV = Normal
Bias plied to the bias roller 1: 440V 44oV = Lighter
when sensing image 2: 500V 500V = Darker
density. 3: 530V 530V = Darkest
34 Toner Supply Determines how much o: 2% o
Amount toner is supplied in 1: 4%
(Detect detect mode B.
Mode B)
35 Toner Supply Changes toner supply o: 0 Standard: Every 10
interval. Standard copies, 0.75V.
a) ID sensor checks 1:
every 5 copies. increase
b) Toner end level
changes to 0.65V.
38 Edge Erase Sets the width of mar- 0: 10mm o
gin erase. 1: 5mm
2: 15mm
3: 20mm

4-9
31 January '89

Factory
Mode No. Function Data Remarks
Setting

39 Center Erase Sets the width of center O: 20mm o
erase. 1: 10mm
2: 15mm
3: 25mm
41 Lead Edge Adjusts the lead edge 0-15 8 (3,5 1 mm per step + 10.5
Erase Margin margin. mm) mm to

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