Frequently Asked Questions

PDF Documents

What is a PDF document?
"PDF" is a file extension used to denote documents of the Adobe Portable Document Format (PDF). PDF files contain text, diagrams, graphics, photos and more, allowing them to look exactly like original documents. This makes them an ideal choice for storing technical and instruction manuals in digital format. PDF documents are searchable and can be opened on nearly any operating system, including Palm OS and Pocket PC devices. The format has become the standard for electronic information exchange. More information on the PDF format can be found at Adobe:
How do I open a PDF document?
A PDF document reader is required to open files with the PDF extension. The latest version of Adobe's Reader can downloaded for free from Adobe: (
Why won't my PDF document open?
If you are having difficulties opening a PDF with Adobe Acrobat Reader, we recommend that you first update the reader to the latest version. If the PDF will still not open, look for a solution at Adobe Support: If you suspect that the PDF is corrupt, please email and we'll look into it.

Downloading Manuals

How do I find a manual?
Manuals can be located in three ways: by searching, by browsing alphabetically, and by company. These options are found in the left frame of the browser window under the heading "Manuals".
How do I download a manual?
After a manual is located through one of the search options above, its title will form a hyperlink that can be clicked. Doing so will bring you to a "Manual Information" page that provides information about the manual, including the company, the title, the language, the number of pages, and the availability of the manual. Depending on whether you are logged in or have an active subscription, you will see a link with one of three messages:
  • If you are not logged in, or if you are a new customer, you will see a link labeled "Login". This link will bring you to a page where you can enter your login information or create a new account.
  • If you are logged in but have not yet purchased a subscription, you'll see a link labeled "This manual requires a subscription to download". This link will bring you to a page where a subscription can be purchased.
  • Once you are logged in and have an active subscription, a link labeled "Download" will allow you download the manual.


How do subscriptions work?
PDF-Zoo provides manuals on a subscription basis. Manuals are not available for purchase individually. Rather, a subscription to the PDF-Zoo service allows for unlimited access to the manual database during the subscription period. Subscriptions are available for periods of time ranging from one day (24 hours) to one year. PDF-Zoo keeps track of all the subscriptions that are purchased. Each subscription will have a status: expired, active, or pending. Only one subscription will be active at any one time. When the active subscription reaches its expiration date, its status will change to expired. Subscriptions that are purchased in addition to the active subscription will have the status "pending".
How long is my account active for?
When a subscription is purchased, it will not become active until the next time the user logs in. When this occurs, the subscription will be activated and the expiration date and time will be set according to the subscription length that was purchased. For example, if one were to purchase a 24 hour subscription at 2:00 PM Monday and then login to PDF-Zoo at 3:00 PM Tuesday, the subscription would become active at 3:00 PM Tuesday and expire at 3:00 PM on the following day, Wednesday.
Can I add more time to an existing account?
Yes. Even when you have an active subscription, another subscription can be purchased and placed in waiting behind it. When the active subscription expires, the next "pending" subscription will be made available, though it will not become active itself until the next time the user logs in to PDF-Zoo. It functions as though a new subscription was purchased as soon as the previous subscription expired. The new subscription does not become activated until the user logs in to PDF-Zoo.
What is the "Subscription History"?
The "Subscription History" is a complete list of all the subscriptions ever purchased. It includes each subscription's status of expired, active, or pending.
How can I view additional subscriptions that I have purchased beyond the active subscription?
Additional subscriptions that have been purchased beyond the active subscription can be seen by clicking on "Subscription History" located under "Account" on the left frame of the browser window. These subscriptions will be listed after the "active" subscription and will have the status "pending".
What happens when my subscription expires?
When your subscription expires, you will no longer be able to download the manuals contained in the PDF-Zoo database. If you purchased an additional subscription prior to the expiration, it will become the new active subscription automatically the next time you log in. If you have no pending subscriptions when the active one expires, you will need to purchase a new subscription.


Do I have to have a Paypal account in order to purchase a subscription?
No. PayPal is the secure payment processor for PDF-Zoo, but a Paypal account is not required to purchase a subscription. If you would like to use your credit card simply proceed to Paypal secure payment and then find "If you do not currently have a PayPal account." Click the button that says "click here". You will then be able to enter your credit card billing information for a secure credit card payment.
What payment types are accepted?
Payment can be made using MasterCard, Visa, Amex, or Discover card. If you have a Paypal account, you may also use any of the funding sources found there.