universal dock is not working for ipod classic (80 GB)

Hi Gusto_ha,

Welcome to the Support Communities! It appears that the Dock adapter is different for the 80 GB iPod classic than the 4 GB iPod. Are you using the correct adapter for your iPod classic? See rows 9 & 10 in the resource below. Are you able to connect your iPod classic directly to the USB port of your computer?

Learn about Apple Universal Dock - Apple Support
http://support.apple.com/en-us/HT1380

The Apple Universal Dock is the ultimate iPod or iPhone docking solution. Any iPod with a dock connector and dock adapter or iPhone can fit into a single Universal Dock through the use of interchangeable inserts called Dock Adapters.

This article has been archived and is no longer updated by Apple.

The Apple Universal Dock includes five Dock Adapters that fit iPhone 4 and 4S, iPhone 3G and 3GS, iPod touch (2nd, 3rd, and 4th generations), and iPod nano 5th generation. Dock adapters for other iPhone or iPod models are sold separately. For a complete list of products that can be docked with the Apple Universal Dock, see the table below.

Note: Depending on when your Apple Universal Dock was purchased, the types of dock adapters included with it may vary.

The Apple Universal Dock also includes an Apple Remote.

You simply insert the Dock Adapter that fits your particular iPod or iPhone model, then plug in your iPod or iPhone. If a dock adapter for your iPod or iPhone model isn’t included with your Universal Dock, you can purchase one at the Apple Online Store.

Universal Dock at a Glance

Identifying Dock Adapters

Each adapter is numbered with an identification number so you can determine which iPod models it supports:

Use this table to determine which iPod models are supported by each adapter and use the model number to order a 3-pack of additional adapters for that iPod model:

Identification Number on Adapter	iPod Models Supported	Model number to order a 3-pack of adapters
1	10, 15, 20 GB iPod (dock connector) models (The 20 GB is the thinner version — .62 inches / 1.57 cm)	MA117G/A
2	20, 30, 40 GB iPod (dock connector) models (The 20 GB is the thicker version — .73 inches / 1.85 cm)	MA118G/A
3	iPod mini and iPod mini (2nd generation)	MA121G/A
4	iPod (Click Wheel) 20 GB and 30 GB	MA119G/A
5	iPod (Click Wheel) 40 GB	MA120G/A
6	iPod with color display 20 GB and 30 GB	MA122G/A
7	iPod with color display 40 GB and 60 GB (also known as iPod photo)	MA123G/A
8	iPod nano 1 GB, 2 GB, and 4 GB	MA124G/A
9	iPod classic 80 GB and 120 GB, 160GB (Late 2009), iPod (5th generation) 30 GB1	MA125G/A
10	iPod classic 160 GB, iPod (5th generation) 60 GB and 80 GB (Late 2006)	MA126G/A
11	iPod nano (2nd generation) 2 GB, 4 GB, and 8 GB2	MA593G/A
12	iPhone 4 GB, 8 GB, and 16 GB	MA722
13	iPod nano (3rd generation) 4 GB and 8 GB	MB126G/A
14	iPod touch	MB127G/A
15	iPhone 3G and iPhone 3GS1	MB546G/A
16	iPod touch (2nd and 3rd generation)1	MB569G/A
17	iPod nano (4th generation)	MB568G/A
18	iPod nano (5th generation)1	MC395ZM/A
19	iPhone 4 and iPhone 4S1	MC598ZM/A
20	iPod touch (4th generation)1	MC598ZM/A

Notes:

1. Included with the Apple Universal Dock.
2. iPod nano (2nd generation) is not compatible with the original iPod nano dock adapter.

Important: iPod shuffle, iPod (scroll wheel), iPod (touch wheel), and iPod nano (6th generation) are incompatible with the Apple Universal Dock since these iPod models do not have a dock connector and dock adapter. If you're not sure which iPod model you have, click here. For iPod models with a dock connector, Apple recommends updating to the latest iPod software with the current version of iTunes, available for free download at support.apple.com/downloads/.

For more information on how to use the Apple Universal Dock, see the Using Apple Universal Dock guide.

Last Modified: Jun 11, 2014

Cheers,

Judy

I had same problem. I'm using an Ipod Classic 160Gb gen 7 (late 2009) and Apple Universal Dock MC746LL/A. I connected both of it each other without dock adapter MA125/A. It's just only works with volume up and down but the ipod screen doesn't appear the volume icon, the volume change when click on remote and can hear by ear. I know I'm not using dock adapter but I watched this video ( https://www.youtube.com/watch?v=QCZsUkF73Go&index=23&list=WL ) on youtube It's work without adapter. I need your help If you know how to fix it please let me know. Thanks!