Ricoh FT2012.212 Technical Bulletin ft2012

Technical Bulletin No. RTB-001

SUBJECT: NIP BAND WIDTH AND TRAILING EDGE SKEW

ADJUSTMENT

PREPARED BY: M. Ishihara
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

1. Nip Band Width Adjustment

The nip band width of this model is decided by the height of each screw on both fusing
unit pressure arms.

Adjust the height of the screw on each pressure arm as follows:

Revision of service manual
Information only
Other

FROM: 1st Field Information Dept. QAC

MODEL:
Skylark (A183/A184)

DATE: Oct. 31, ’96
PAGE: 1 of 2

Item Parts No. Specification

Right Pressure Arm
Left Pressure Arm

❋ Note that the adjustment specification differs between the two pressure arms.

A1844085
A1844086

8 ± 0.2

7.5 ± 0.2

Technical Bulletin No. RTB-001

SUBJECT: NIP BAND WIDTH AND TRAILING EDGE SKEW

ADJUSTMENT

2. Trailing Edge Skew Adjustment Procedure

Perform the following procedure in the field to decrease the amount of trailing edge skew:

1) Measure the height of the screw on both fusing unit pressure arms. (The factory
standard specification is described on the previous page.)

2) Change the screw height, making sure of the following:
NOTE: • The skew will be reduced 0.1 mm by turning the screw once.

• The height of the screw will change 0.7 mm by turning once.

• Do not turn the screw more than 3 turns.

✩ If the skew on the copy paper is to the right, turn the left pressure arm screw

clockwise.

DATE: Oct. 31 ’96
PAGE: 2 of 2

✩ If the skew on the copy paper is to the left, turn the right pressure arm screw

clockwise.

RICOH Technical Bulletin PAGE: 1/1

Model: Skylark Date: 31-Mar-97
Subject: SC Code #96 Prepared by: M.Ishihara
From: QAC 1st Field Information Dept. Checked by: T. Inoue
Classification:

The following should be added to the “SERVICE CALL CONDITIONS” in the Service
Manual.

Troubleshooting
Mechanical
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Action required
Service manual revision
Retrofit information

No: 2

CODE #96 - MAIN SWITCH ERROR

Definition

The machine does not turn off within 8.5 seconds after Auto Shut Off is performed.

Possible Causes

• Defective main switch.

• Connectors of the main switch are not correctly connected.

• Defective dc harness of the main switch connection (some lines must be cut.)

∗Remedy for the initially produced machines

• Turn the main switch off and on.

RICOH Technical Bulletin PAGE: 1/1

Model: Skylark Date: 15-Apr-97
Subject: Additional Procedures for Operation Panel change Prepared by: M.Ishihara
From: QAC 1st Field Information Dept. Checked by: T. Inoue
Classification:

Troubleshooting
Mechanical
Paper path
Other ( )

Part information
Electrical
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Action required
Service manual revision
Retrofit information

No: 3

SYMPTOM : Wrong indication on the Operation Panel

CAUSE : Bad connection of the 11P and 6P connectors

SOLUTION:

To confirm whether the two connectors are connected properly or not, the following steps
are required when there is an operation panel change from the horizontal position to the
vertical position or vice versa.

1) After connecting the 4 connectors (1.11P:from the main harness to the relay harness,

2.11P: from the relay harness to the operation panel, 3. 6P: from the main harness to
the relay harness, 4. 6P: from the relay harness to the operation panel), confirm that
the connectors are securely connected.

2) Confirm that all indicators can be lit using SP mode No. 11. (This turns on all
indicators on the operation panel for 30 seconds. It will turn off automatically after 30
seconds. To turn off the indicators immediately, press the lighter key.) The red and
green parts of the copy start indicator turn on together. So the color must be mixed.

3) Turn the main switch off and on.

4) Check all key functions by pressing all keys.

RICOH Technical Bulletin PAGE: 1/3

Model: Skylark Date: 15-Apr-97

No: 4

Subject: ADS Adjustment Procedure Prepared by: M. Ishihara
From: QAC 1st Field Information Dept. Checked by: T. Inoue
Classification:

Troubleshooting
Mechanical
Paper path
Other ( )

Part information
Electrical
Transmit/receive

Action required
Service manual revision
Retrofit information

Please correct your Service Manual as follows:

Page 6-41

*: Changed or Newly Added parts

7.6 ADS Adjustment

When: 1. After light intensity is changed

2. Image density in ADS mode is too light or too dark
Purpose: To maintain correct ADS mode operation.
Adjustment

Standard:
Method: SP56 and VR100 on the main board
How it works: The bias voltage thresholds which correspond to image density will all change.

ADS Voltage = 2.5 +-0.2V

1. Place 5 sheets of A4 paper on the exposure glass.

2. Access SP56. The ADS sensor output is displayed.
*3. Adjust to 2.5+-0.2 V by turning VR100 on the main board.

*NOTE:

1) SP56 should not be used for observing the output value. The standard setting
inside the EEPROM is overwritten when this SP mode is accessed.

2) The machines from the factory may not always be within 2.5+-0.2 V. This is not a
problem. When adjusting in the field, adjust it to the value described above.

- Reasons for correction -

1. Note 1 has been added to make sure that SP56 (ADS Adjustment) is used to memorize
the adjustment standard value, not for checking the output value.

2. VR101 should always be adjusted after opening SP56, to adjust the voltage to the
standard value.

3. To perform SP56, the Start key does not have to be pressed.

RICOH Technical Bulletin PAGE: 2/3

Model: Skylark Date: 15-Apr-97

Page 7-3

1.2 DIRTY BACKGROUND

“Possible Causes” should be corrected as follows. Item No. 5 has been eliminated
since this copier does not use a fiber optics cable for the ADS sensor.

-Possible Causes-

1. Dirty optics

2. Toner scattering

• High toner density

• The inlet seal of the development unit is stripped off.

• User/SP mode setting error

3. The exposure lamp is not bright enough. This may be caused by deterioration of the
exposure lamp or low lamp voltage.

No: 4

4. In ADS mode, light reflected from the original is too intense.

5. The development bias is grounded.

Page 7-4

1.2 DIRTY BACKGROUND

The last paragraph of “Action ” should be corrected as follows.
If dirty background occurs only in ADS mode, do the following:

• Clean the optics and perform the necessary SP modes in order
(see Section 4 - Service Remarks for details)

• If the signal at CN112-3 stays HIGH, check the harness and sensor, and replace any

defective parts.

• If the signal at CN112-2 stays LOW, replace the main board.