---
title: Maintenance/Troubleshooting
slug: dtfsk/maintenancetroubleshooting
docTags: 
createdAt: 2024-08-02T18:07:51.631Z
---

## Film Carrier Mask Replacement

The DT FSK uses a magnetic mask to hold the film in place. The magnetic masks are user-replaceable, and replacements are available as a purchasable service item.

Carriers Available:

- 35mm Strip Film Mask - [DT159019](https://heritage-digitaltransitions.com/product/fsk-masks-35/)
- 120/220 Format Strip Film Mask  - [DT159020](https://heritage-digitaltransitions.com/product/fsk-masks-120/)
- 4×5 Sheet Film Mask - [DT159021](https://heritage-digitaltransitions.com/product/fsk-masks-4x5/)

:::hint{type="info"}
**Replacement Parts: **To confirm which parts you should purchase, or replace the carrier, please reach out to support at support\@digitaltransitions.com
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Using a PH1 screwdriver, remove the three screws at the left of the film carrier.
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Remove the metal support bar, and then remove the mask material. 

*If asked for a serial number by support, it will can be found under the mask on this area of the carrier. *
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Locate the new mask over the screw holes. 
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Replace the metal bar, and tighten the screws. 
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## Cleaning the ANR Glass

To ensure optimum performance, the ANR glass is cleanable by the end user. We recommend the following procedure be followed to ensure the maximum useful life from your glass carrier. 

:::hint{type="warning"}
**ANR coatings are soft and can be easily scratched**. Clean film using an ionized and filtered air source before placing it on the carrier to reduce the chance of hard debris such as sand from remaining on the film when you place it on the glass, which would scratch the coating. Avoid dragging film across the glass surface to prevent scratching the coating.
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**Cleaning Materials:**

- A brand new lint-free cloth, such as a KimTech wipe. 
- An air blower.
- A 3:1 mix of isopropyl alcohol and distilled water placed in a spray bottle. For removing heavy fingerprint build up, use an optical lens cleaner. 

**Cleaning Process:**

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Blow loose dust off the glass surfaces using a rocket blower or ionized filtered air compressor.
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If smudges or stubborn dust remain, use a streak-free lens cleaning solution and a new low-lint wipe (we recommend KimTech) to gently wipe away the smudge. DT recommends a 3:1 mix of distilled water and 99% Isopropyl Alcohol.
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Do not scrub at the glass. Avoid reusing cleaning cloths, as microfiber cloths can trap dust and cause scratching of the coatings.
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Always handle the ANR carrier by the metal or plastic edges to minimize fingerprints on the glass.
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