Samsung CLP-610ND / CLP-660N Color Laser Printer Service Manual (P/N 0660-C00SEE)

• Covers the Samsung CLP-610ND and CLP-660N/660ND color laser printers used in SMB/small-workgroup environments; the cover also carries the CLP-660N/SEE designation and lists CLP-610ND/660ND as the basic models. Side-by-side tables compare the print engine, controller/RAM, duplex, paper handling, CRU/FRU, reliability, and duty-cycle categories.
• Identifies the August 2007 Samsung publication, code 0660-C00SEE, Version 1.00, supplied as a 180-page PDF.
• Documents removal and replacement work for the cover unit, HVPS, main board, SMPS, fuser-control board, LSU, CRUM interface, fuser drive, pickup roller, and feed-drive assembly, plus toner-cartridge and PTB service.
• Provides Tech Mode and EDC Mode diagnostics for sensor status, motors, fans, clutches and solenoids, fuser control, LSU functions, developer/high-voltage outputs, counter resets, margins, event logs, and test-pattern printing.
• Details Auto Color Registration setup and reset, supplies-life monitoring, configuration and network reports, and normal or special firmware updates through USB, the network port, SWS, or SWAS.
• Includes symptom charts for print-quality defects and paper feeding, plus Jam 0/1/2 and duplex-jam logic, wrong print position, paper rolled in the fuser, blank-LCD/OPE problems, no-power and fuser faults, LSU motor/Hsync errors, toner/CRUM faults, and printer/engine error-message tables.
• Supplies model-specific main-controller and engine-controller block diagrams, power-flow and connection drawings, exploded views, SEC-code parts lists, and a CLP-610/CLP-660 difference table for controller, RAM, fuser-drive, connector, and fuser-frame variations.

Component and System Documentation

The Samsung CLP-610ND and CLP-660N series service manual covers more than routine operator maintenance. Its system overview follows the tandem color engine from the organic photo conductor (OPC), charge and developing rollers through the paper transfer belt (PTB), transfer roller, belt-type fuser, duplex path, and exit system. The hardware section connects the main board with the HVPS, SMPS, fuser drive board, CRUM interface, laser scanner, motors, fans, sensors, cassette, multi-purpose feeder, and optional second cassette feeder.

The photo-based disassembly chapter is organized by assembly so technicians can plan access and replacement work before the printer is opened. Exploded views and matching SEC-code parts lists cover the main frame and covers, operator-panel (OPE) unit, feed and fuser drives, fuser, PTB, cassette, and second-cassette assemblies. The lists also distinguish service-available and non-service-available items, which is useful when deciding whether a repair should be handled at component or assembly level.

The manual specifically treats the LSU, PTB, and main/developer drive assemblies as factory-aligned service parts: opening or misaligning them can introduce dust, upset the PTB home reference, and cause registration, toner-distribution, or drive-noise faults. It also warns that the OPC surface is light- and scratch-sensitive, and that Auto Color Registration must be performed after certain component replacements.

High-voltage, laser, hot-fuser, and ESD-sensitive components require electrical isolation and trained handling. Disconnect the printer from AC power, allow the fuser to cool, and follow the manual's ESD precautions before internal repair work.

Electrical, Diagnostic, and Model-Variant Coverage

Electrical references go down to service-level detail, including SMPS output channels (+3.3 V, +5 V, +24 V, +24VF1, +24VF2), power distribution to logic and mechanical loads, and HVPS data for charger, developer, supply, transfer, attraction (ATTR), eraser, and fuser-bias circuits. Named drawings include the 24 ppm Main Controller Block Diagram for the CLP-660, the 20 ppm Main Controller Block Diagram for the CLP-610, the CLP-610N/610ND and CLP-660N/660ND Engine Controller Block Diagrams, the CLP-660N/660ND/610ND Power Flow drawing, and the multi-page Connection Diagram.

The variant references are important before ordering electronic or fuser parts. The CLP-610 uses a Chorus3/DDR2 controller and a single-lamp, pulse-controlled fuser drive, while the CLP-660 uses an RM7065C/SPGPXm/DDR1 controller and a dual-lamp, phase-controlled fuser drive. Separate entries identify the main PBAs, RAM modules, fuser-drawer connectors, and 110 V/220 V SMPS, FDB, and fuser assemblies.

Error-message tables pair display messages with explanations and service responses, while the periodic-defect chart links repeating marks to the OPC, charge, supply, developer, transfer, gap-ring, and fusing-belt rotations. Combined with component tests, service reports, firmware support, and replacement procedures, the manual supports diagnosis, parts selection, repair, and post-repair test printing for technicians and experienced DIY owners.