X-ray film processor components · Horizon family

Codonics Horizon Donor Lift: troubleshooting and error codes

The ServiceForge knowledge base holds 15 documented symptoms for the Codonics Horizon Donor Lift, with 18 ranked causes, 22 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Belt damage from improper handling caution

Alcohol or other solvents in bearing areas may migrate onto belt; improper glove use or contact during installation may damage belt surface.

Ranked causes

1. Alcohol or solvent contact with bearings or belt during cleaning (occasional)
2. Improper glove contact damaging belt surface (rare)

First check

Inspect bearing areas for alcohol or solvent residue

Test point: Bearing surfaces and surrounding area
Expected: No visible liquid, no discoloration, no odor of alcohol or solvents

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Belt tracking misalignment after installation caution

Belt walks back and forth when Media Drive Pulley direction changes, indicating improper centering or orientation; may cause bad registration on output media.

Ranked causes

1. Belt installed with incorrect orientation (inside/outside reversed) (common)
2. Belt not properly centered on Media Drive Pulley (common)

First check

Verify belt orientation by visual and tactile inspection

Test point: Belt contact surface on pulleys
Expected: Inner surface (rough) against pulleys, outer surface (smooth) exposed

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Belt walks back and forth during pulley rotation caution

Belt tracking deviates more than 0.020" when Media Drive Pulley direction changes between clockwise and counterclockwise

Ranked causes

1. Belt installed incorrectly (inside/outside reversed or misaligned) (common)
2. Bad registration (mechanical wear or damage) (occasional)

First check

Verify belt orientation (inner/outer surface)

Test point: Belt contact surface
Expected: Inner surface rough, outer surface smooth

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Belt surface contamination caution

Alcohol contamination in belt bearings or pulley mechanism

Ranked causes

1. Alcohol contact with bearings during maintenance (occasional)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Belt walk-back during pulley rotation caution

Belt walks back and forth when Media Drive Pulley direction is changed; may cause bad image registration

Ranked causes

1. Belt incorrectly centered or seated on pulleys (common)

First check

Rotate Media Drive Pulley and observe belt tracking

Test point: Belt on Media Drive Pulley
Expected: Belt does not walk back and forth when pulley direction changes, <= 0.020 inch

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Belt installation caution

Procedure to install and center media drive belt on pulleys

Ranked causes

1. Initial belt installation (unknown)

First check

Verify belt surface orientation

Test point: Belt inner and outer surfaces
Expected: Inner surface rough, outer surface smooth

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Media Drive Cover installation caution

Procedure to attach Media Drive Cover with proper torque and washer positioning

Ranked causes

1. Media Drive Cover assembly (unknown)

First check

Torque cover screws

Test point: Media Drive Cover mounting screws
Expected: 13 in-lbs +/- 1.0, +/- 1.0
Tools: T15 Torx Screwdriver, torque wrench

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Donor Lift PCB replacement required caution

PCB removal and installation procedure for Horizon Donor Lift assembly. Involves disconnecting FFC cable and removing mounting screws before replacement.

Ranked causes

1. Donor Lift PCB failure or malfunction (unknown)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Donor Lift PCB requires replacement caution

PCB removal and installation procedure for Horizon Donor Lift component in X-ray film processor

Ranked causes

1. Donor Lift PCB failure or damage (unknown)

First check

Set aside Media Drive Belt

Test point: 820-001-001 Media Drive Belt
Expected: Set aside safely

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Drive component cleaning after pulley installation

Media Drive Pulley, Idler Pulley, and Drive Pinion require cleaning to remove contamination

Ranked causes

1. Contamination on drive components after assembly (occasional)

First check

Clean drive components

Test point: Drive Pinion, Idler Pulley, Media Drive Pulley
Expected: All three components visually clean, no contamination
Tools: 99% alcohol wipes

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Drive components require cleaning after assembly

Drive Pinion, Idler Pulley, and Media Drive Pulley must be cleaned with alcohol wipe after installation

Ranked causes

1. Drive components contaminated or require post-assembly cleaning (unknown)

First check

Verify drive components cleaned with alcohol wipe

Test point: Drive Pinion, Idler Pulley, Media Drive Pulley
Expected: Clean and dry, free of debris

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Incorrect screw installation in Donor Lift PCB causes component damage caution

Installing longer screw in bottom hole of PCB instead of shorter screw can damage internal components of Horizon Imager, specifically the Donor Supply Carriage

Ranked causes

1. Shorter screw not installed in bottom hole of PCB (common)

First check

Verify correct screw length installed in bottom PCB hole

Test point: Bottom hole of SP-00217 PCB
Expected: Shorter screw with T10 bit

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Media Drive Pulley installation requires proper fastener torque caution

Installation of Media Drive Pulley to Capstan using 8-32 x 3/8 screw requires specific torque and technique to prevent component rotation

Ranked causes

1. Media Drive Pulley fastener torque specification not met (common)

First check

Measure torque on Media Drive Pulley fastener

Test point: 8-32 x 3/8 screw in Capstan end
Expected: 20 in-lbs, +/- 2.0
Tools: T20 Torx Screwdriver, torque wrench

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Media Drive Pulley installation requires secure fastening caution

Pulley must be prevented from rotating during tightening to ensure safe and proper installation

Ranked causes

1. Pulley rotation during fastener tightening (common)

First check

Prevent pulley from rotating during fastener tightening

Test point: Media Drive Pulley
Expected: Pulley held stationary while screw is tightened
Tools: Gloves, hand grip

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

PCB installation requires proper orientation patient safety

Shorter screw placement critical for internal component protection; incorrect placement can damage Donor Supply Carriage

Ranked causes

1. Shorter screw installed in top hole instead of bottom hole (common)

First check

Verify screw placement before final torque

Test point: PCB bottom and top holes
Expected: Shorter screw in bottom hole, longer screw in top hole, Must be in correct holes
Tools: Visual inspection

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.