Medical imagers · Horizon family

Codonics Horizon Imager: troubleshooting and error codes

The ServiceForge knowledge base holds 19 documented symptoms for the Codonics Horizon Imager, with 21 ranked causes, 31 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

Media jamming or output issues after door replacement caution

Jamming, fanfolding, or unusual noises observed during or after printing following main door replacement

Ranked causes

1. Door misalignment affecting media path (occasional)
2. Media path obstruction (occasional)

First check

Print 20 test pages and observe media handling

Test point: Output tray 1
Expected: Media exits cleanly without jamming, fanfolding, or unusual noises

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

Media Wall damaged during handling or installation caution

New Media Wall may arrive with physical damage (nicks, dings, burrs) on front side or top edge, or may sustain damage during installation if not properly protected.

Ranked causes

1. Media Wall not inspected for pre-existing damage before installation (occasional)
2. Media Wall not wrapped with protective material during installation (common)

First check

Inspect new Media Wall for damage

Test point: Front side and top edge
Expected: No nicks, dings, or burrs visible

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

Cable damage during Media Wall removal and installation caution

Cabling for TPH and circuit PCBs is vulnerable to damage during Media Wall work, and cable damage requires unit exchange.

Ranked causes

1. Extreme care not taken while working in cable-vulnerable area (common)

First check

Cables clear of Media Wall path during installation

Test point: FFC, ribbon cables, Greatwall area
Expected: All cables positioned away from Media Wall insertion path

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

Door does not rotate down below angle threshold caution

Door fails to rotate downward under its own weight when below the specified angle threshold

Ranked causes

1. Door friction or mechanical binding (unknown)

First check

Rotate door and observe operation at angle threshold

Test point: Main door assembly
Expected: Door opens under spring force above threshold; door rotates down under own weight below threshold

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

Main Door binding during operation caution

Main Door does not slide smoothly or becomes stuck due to spring interference

Ranked causes

1. Spring tails caught in Greatwall holes (common)

First check

Verify spring tail position before final assembly

Test point: Greatwall holes
Expected: Spring tails clear of all holes

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

Main Door binds during operation caution

Main Door does not slide smoothly; springs catch in Greatwall holes causing resistance or sticking

Ranked causes

1. Spring tails caught in Greatwall holes during assembly (common)

First check

Inspect spring tail position relative to Greatwall holes

Test point: Spring tails and Greatwall mounting holes
Expected: Spring tails not caught in or passing through Greatwall holes

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

Main door binds with Greatwall caution

Main door does not move freely; binds or sticks when opening or closing after shoulder screw installation

Ranked causes

1. Excess Loctite 262 on shoulder screw threads protrudes beyond thread roots (common)

First check

Inspect shoulder screw threads for excess Loctite protruding beyond thread roots

Test point: 700-021-008 shoulder screws, Greatwall internal threads
Expected: Loctite fills thread roots only, no protrusion beyond threads

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

Main Door binds with Greatwall after assembly caution

Door does not move freely or binds when installed on Greatwall due to excessive Loctite on shoulder screw threads

Ranked causes

1. Excess Loctite applied to shoulder screw threads (common)

First check

Clean Greatwall threads of old Loctite using alcohol wipe

Test point: Greatwall internal threads
Expected: Threads clean, no residual Loctite

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

Main door binds with Greatwall after shoulder screw installation caution

Main door does not move freely or binds when installed after applying Loctite to shoulder screws

Ranked causes

1. Excess Loctite protruding beyond thread roots on shoulder screws (common)

First check

Inspect shoulder screw threads for excess Loctite protruding beyond thread roots

Test point: 700-021-008 shoulder screws, internal threads of Greatwall
Expected: Loctite fills thread roots only, no protrusion beyond threads

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

Main door does not open above angle threshold caution

Door fails to open under spring force when rotated above the specified angle threshold during operation

Ranked causes

1. Spring mechanism failure or incorrect installation (unknown)

First check

Rotate door and observe operation at angle threshold

Test point: Main door assembly
Expected: Door opens under spring force above threshold; door rotates down under own weight below threshold

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

Main door fastener torque

Specification for shoulder screw torque when installing main door.

Ranked causes

1. Fastener specification required (unknown)

First check

Set torque screwdriver to specification

Test point: 680-129-004 torque screwdriver
Expected: 13 in-lbs
Tools: 680-129-004 torque screwdriver

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

Main Door replacement caution

Remove and install main door assembly on Horizon Imager

Ranked causes

1. Main door requires replacement or service (unknown)

First check

Locate shoulder screws securing main door

Test point: Main door attachment points
Expected: Two shoulder screws visible and accessible

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

Main door replacement required patient safety

Main door needs to be removed and replaced on Horizon Imager; involves removal of shoulder screws and curved disk washers

Ranked causes

1. Main door component failure or damage (unknown)

First check

Remove shoulder screws securing main door

Test point: Main door fastening points
Expected: Two shoulder screws present

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

Main Door requires replacement caution

Main Door is removed from Horizon Imager and must be reinstalled with new components.

Ranked causes

1. Main Door removal/replacement procedure (unknown)

First check

Torque Main Door shoulder screws

Test point: Main Door shoulder screws
Expected: 13 in-lbs
Tools: 680-129-004 TOOL TORQUE SCREWDRIVER with 680-067-013 TOOL BIT HEX 3/32 2 LONG BALL END

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

Media Wall Gap out of specification

Gap between media wall and encoder wheels does not match go/no-go gauge specification; media may not feed or encode properly.

Ranked causes

1. Media Wall misaligned or worn (unknown)

First check

Verify Media Wall Gap using go/no-go gauge at multiple points

Test point: Points along media wall except area in front of Media Encoder wheels
Expected: Go end of tool should easily fit into the gap

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

Media Wall installation caution

Procedure for replacing or installing the Media Wall assembly in the Horizon Imager

Ranked causes

1. Media Wall requires replacement or installation (unknown)

First check

Verify Media Wall position using gap gauge

Test point: Media Wall gap
Expected: Within go/no-go gauge limits
Tools: 680-107-001 TOOL MEDIA WALL GAP GO/NO-GO GAUGE

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

Media Wall installation risk of cable damage caution

FFC, ribbon cables, and stepper motor cables can be snagged during Media Wall installation, potentially causing equipment damage requiring unit exchange.

Ranked causes

1. Cables not latched and positioned out of the way before installation (common)

First check

Verify FFC, ribbon cables, and stepper motor cables are latched and clear

Test point: FFC, ribbon cables, stepper motor cables
Expected: All cables latched and positioned out of the way

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

Media Wall removal risks cable damage caution

During Media Wall removal and installation, cabling for TPH and circuit PCBs is vulnerable to damage. Damage to cables requires unit exchange.

Ranked causes

1. Cables pinched or snagged during Media Wall removal (common)

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

Top cover does not open when commanded

Top cover fails to open when selected from menu option after main door replacement

Ranked causes

1. Door assembly installation affecting cover mechanism (unknown)

First check

Command top cover to open via menu

Test point: Top cover
Expected: Cover opens as expected

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.