Technical Bulletin No. RTB-001 SUBJECT: Light Copies DATE: Nov. 30, ’96 PAGE: 1 of 2 PREPARED BY: F. Noguchi CHECKED BY: T. Inoue FROM: 1st Field Information Dept. QAC CLASSIFICATION: Action Required Troubleshooting Retrofit Information Revision of service manual Information only Other MODEL: F401/411/421 F401S N x 0.5 30% F400S N x 1.0 60% L H L H Toner Supply Co-efficient Max. Toner Supply Ratio x 0.3 30% x 1.0 60% x 0.5 30% x 1.5 90% <Symptom> When making multiple copies (100~300) of an original with a high image area ratio (example: Test Chart=35%), there is a drop in the copy image density. <Cause> The toner supply level is less than the toner consumption level. <Field Action> 1. If the customer frequently makes copies of originals with an image area ratio of more than 30%, please change the toner supply ratio from "N" to "H". (SP Adjustment, page 7, Factory Use-T) Note: If the toner supply level of "H" is selected, dirty background may appear in non-image areas during toner supply. Explanation To prevent dirty background during toner supply with the F401S, the toner supply rate default level has been lowered. (A 6% letter original has been found to be the type of original most often used in the field.) 2. During installation or demonstrations, please do not use an original with a high image area ratio, like the test chart, in the multi-copy mode (100~300). Reason: Vsp is detected after the copy run has been completed if 10 or more copies are made after the last Vsp detection. Since the transfer belt must be released when checking Vsp, a Vsp check cannot be done during a multi-copy run. Therefore, the toner density control during a multi-copy run will try to get close to the VT based on the Vref determined at the time of the last ID Sensor detection. In other words, it tries to maintain the toner density at the level set during the last ID sensor check. At the start of the copy run, if Vsp<1/10Vsg then the toner supplied will be insufficient. After the multi-copy run, the ID Sensor detection was performed and Vref was changed but since the toner density did not reach the targeted toner density level, the image density dropped during the next multi-copy run. <Service Manual Correction> (See attached page) Section 4: Service Tables 2. Service Program Mode 2.2: Service Program Mode Table Page 4-12
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Compatible Models: Ricoh-FT7650-7660.
– Ricoh-FT7650-7660 Technical-Bulletin: is a handbook published by Ricoh manufacturer or a specialized publishing company that contains instructions and specifications for the maintenance, repair, and how to fix all error of a specific Ricoh-FT7650-7660 Printer. It may includes Exploded Views, Parts List, System Diagram, Disassembly and Reassembly, Alignment, Troubleshooting guides, Adjustments, hard reset code, factory reset…

You can do with Ricoh-FT7650-7660 Technical-Bulletin:

1.1 Guide you from basic to advanced usage it.
1.2 Fluent Disassembly and Re-assembly Ricoh-FT7650-7660 Technical-Bulletin.
1.3 Diagnostic all errors are generated by Ricoh-FT7650-7660 Technical-Bulletin:
– The printer does not print.
– Paper does not feed into the printer.
– A print job is extremely slow.
– Half the page is blank.
– The paper keeps jamming, Paper Jam inside, Paper Jam Outside…
– The printer prints, but the text is wrong, garbled, or incomplete.
– Pages print, but are blank.
– The print quality of photos is not good. Images are not clear.
– Your printer has an odd smell during initial use.
1.4 How to refill toner/ink Ricoh-FT7650-7660.
1.5 How to update firmware Ricoh-FT7650-7660.
1.6 How to reset page counter by software, fix all error cause by ink/toner cartridge Ricoh-FT7650-7660: Waste Ink Ink Pad Error, ink cartridge error, red light blinking, red-green light blinking, yellow blinking, Ink cartridge failure, waste ink over flow, ink out, ink level, incompatible ink cartridges, toner cartridge not competition, install toner cartridge, toner exhausted, toner low, toner empty, toner very low…How to use Adjustments Program.
1.7 How to fix main board error, print head, formater board error Ricoh-FT7650-7660.
1.8 How to troubleshooting printer problem with low quality page .
1.9 How to fix : Communication Error, Model Difference, Cover open(Tray) Error, Paper Out Error, Paper Jam Error, Paper Mismatch Error, Ink Low, Ink End Error, No Ink Cartridge, CSIC Error, Maintenance Request Error, Fatal Error…
1.10 How to fix sensor error: empty image, imaging unit is not installed, sensor failure, turn off then on, fusser error, LSU error, Engine board problem, Flash ROM problem, Main motor problem, Sirocco fan problem, Power supply cooling fan problem, Suction fan problem, Polygon motor problem, Laser problem, Secondary transfer voltage contact/release problem, Transfer belt cleaner contact/release problem, Transfer belt rotation problem, Imaging rack rotation problem, Fuser roller temperature increase problem, Fuser roller low temperature problem, Fuser roller high temperature problem, Fuser roller thermistor problem, Transparency detection sensor problem, Main unit memory counter problem, Main unit memory data problem, Main unit memory access problem, Main unit memory installation problem, Engine communication error.

Ricoh-FT7650-7660 Technical-Bulletin covers following topics:

– Precautions Ricoh-FT7650-7660.
– Product Specification Ricoh-FT7650-7660.
– System Overview Ricoh-FT7650-7660.
– S/W Structure and Descriptions Ricoh-FT7650-7660.
– Disassembly and Reassembly Ricoh-FT7650-7660.
– Alignment and Adjustments Ricoh-FT7650-7660.
– Troubleshooting Ricoh-FT7650-7660.
– Exploded Views & Parts List Ricoh-FT7650-7660.

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Ricoh-FT7650-7660 Technical-Bulletin

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