Featured Help with band diagram for alpine 7511 cassette deck

[peedrah]

Need some advice on belt diagram for alpine 7511 cassette deck. I can’t seem to track down any belt diagrams so any help with the belt diagram is appreciated. The old belt was all gummed up wrapped around the motor and I can’t tell where to place the belts. The way I have the belts can be completely wrong too-just took my best guess. The first pic is the exploded diagram, 2nd and 3rd pics are how I have the two belts set up. In it’s current set up, the tape get eaten and only the green spindle spins (see 4th pic). Pink spindle doesn’t move. Also FF and REW don’t do anything. In the 5th pick, there is a gear (think it may be the gear selector) that when you spin manually, the pink spindle spins (compare pic 2, 4and 5). It makes me think the band should go around that gear as well but not sure how.

I did find the belt diagram for another alpine cassette deck and think that may be correct (pic6)

Here what I’m thinking I need to do (pic 7). The motor cog has two notches at two different levels -the bottom notch that lines up with the gear selector and the top that lines up with the black corner pulley. I’m just not sure how to take the top piece off with the stamped numbers without having everything underneath it fall out. Also not sure of the large band size.

Separately, I accidentally pulling this ground wire off (pic 8&9). I think that’s were I need to resolder, right?

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[CarAudio.com - Hal AI Bots]

Need some advice on belt diagram for alpine 7511 cassette deck. I can’t seem to track down any belt diagrams so any help with the belt diagram is appreciated. The old belt was all gummed up wrapped around the motor and I can’t tell where to place the belts. The way I have the belts can be completely wrong too-just took my best guess. The first pic is the exploded diagram, 2nd and 3rd pics are how I have the two belts set up. In it’s current set up, the tape get eaten and only the green spindle spins (see 4th pic). Pink spindle doesn’t move. Also FF and REW don’t do anything. In the 5th pick, there is a gear (think it may be the gear selector) that when you spin manually, the pink spindle spins (compare pic 2, 4and 5). It makes me think the band should go around that gear as well but not sure how.

I did find the belt diagram for another alpine cassette deck and think that may be correct (pic6)

Here what I’m thinking I need to do (pic 7). The motor cog has two notches at two different levels -the bottom notch that lines up with the gear selector and the top that lines up with the black corner pulley. I’m just not sure how to take the top piece off with the stamped numbers without having everything underneath it fall out. Also not sure of the large band size.

Separately, I accidentally pulling this ground wire off (pic 8&9). I think that’s were I need to resolder, right?

To address the belt diagram and installation issue for your Alpine 7511 cassette deck, let's break it down step-by-step.

### 1. **Belt Installation:**
- **Understanding the Setup:**
- It's essential to have a clear understanding of how the belts should be routed. Since the old belt was gummed up and you can't tell the original path, it can be tricky.
- Typically, the motor drives one belt that connects to the capstan (the green spindle) and another belt that drives the idler or other pulleys (the pink spindle).

- **Following the Diagram:**
- If you found a belt diagram for another Alpine cassette deck that you believe is similar, it may be worth trying that layout.
- The key is to ensure that the belts are not over-tightened and have enough tension to engage the spindles correctly.

- **Gear Selector:**
- You mentioned that the gear selector affects the pink spindle. It’s likely that the belt needs to loop around that gear to enable the pink spindle to engage properly.
- Check the exploded diagram carefully to see how the belts interact with the gear selector and make adjustments accordingly.

- **Motor Cog Notches:**
- The two notches you see on the motor cog likely indicate different positions for belt routing. You might want to try both configurations to see which one allows the pink spindle to spin.
- Be cautious when removing any parts to avoid disassembling more than necessary.

### 2. **Taking Off the Top Piece:**
- If you’re unsure how to remove the top piece without losing components underneath, gently disassemble the top section while keeping an eye on how everything fits together.
- You can take pictures or notes as you go, so you can put it back correctly.

### 3. **Identifying Belt Sizes:**
- If you don’t have the correct belt sizes, you might need to measure the old belt (if possible) or consult with a service manual or online resource to find the proper dimensions.
- If the old belt is unusable, you can also search for replacement belt kits specific to your model.

### 4. **Ground Wire Resoldering:**
- Yes, the ground wire that you pulled off should be resoldered to the correct location. This is crucial for the proper functioning of your cassette deck.
- Ensure that you clean the area where the wire connects to the board before resoldering to ensure a good electrical connection.

### Conclusion:
Revisit the belt routing using the exploded diagram and the suggestions above. Make sure to securely resolder the ground wire. If you're still facing issues or have further questions, feel free to ask for more assistance or insights from other members who might have experience with this specific model!

 

[peedrah]

To address the belt diagram and installation issue for your Alpine 7511 cassette deck, let's break it down step-by-step.

### 1. **Belt Installation:**
- **Understanding the Setup:**
- It's essential to have a clear understanding of how the belts should be routed. Since the old belt was gummed up and you can't tell the original path, it can be tricky.
- Typically, the motor drives one belt that connects to the capstan (the green spindle) and another belt that drives the idler or other pulleys (the pink spindle).

- **Following the Diagram:**
- If you found a belt diagram for another Alpine cassette deck that you believe is similar, it may be worth trying that layout.
- The key is to ensure that the belts are not over-tightened and have enough tension to engage the spindles correctly.

- **Gear Selector:**
- You mentioned that the gear selector affects the pink spindle. It’s likely that the belt needs to loop around that gear to enable the pink spindle to engage properly.
- Check the exploded diagram carefully to see how the belts interact with the gear selector and make adjustments accordingly.

- **Motor Cog Notches:**
- The two notches you see on the motor cog likely indicate different positions for belt routing. You might want to try both configurations to see which one allows the pink spindle to spin.
- Be cautious when removing any parts to avoid disassembling more than necessary.

### 2. **Taking Off the Top Piece:**
- If you’re unsure how to remove the top piece without losing components underneath, gently disassemble the top section while keeping an eye on how everything fits together.
- You can take pictures or notes as you go, so you can put it back correctly.

### 3. **Identifying Belt Sizes:**
- If you don’t have the correct belt sizes, you might need to measure the old belt (if possible) or consult with a service manual or online resource to find the proper dimensions.
- If the old belt is unusable, you can also search for replacement belt kits specific to your model.

### 4. **Ground Wire Resoldering:**
- Yes, the ground wire that you pulled off should be resoldered to the correct location. This is crucial for the proper functioning of your cassette deck.
- Ensure that you clean the area where the wire connects to the board before resoldering to ensure a good electrical connection.

### Conclusion:
Revisit the belt routing using the exploded diagram and the suggestions above. Make sure to securely resolder the ground wire. If you're still facing issues or have further questions, feel free to ask for more assistance or insights from other members who might have experience with this specific model!

Thanks for this thorough response! With the current belt setup which I think is wrong, the green capstan spins without a bet directly connected.

To try to find the correct belt, I’m going to use a piece of thread and measure the length. The biggest banding have definitely puts more tension on the motor so I need to find the correct belt. If I can figure out the correct belt diagram, I don’t think that using a tight belt for a few seconds will do any damage I hope.

Motor cog notches- one notch definitely lines up with the gear selector and the other one lines up with the black pulley so I’m sure that there are two belts coming off of the motor. I am just super weary of taking off the stamped cover because it seems like there are a lot of of pieces that are attached to the top but I will try. I’ve been taking pictures of everything along the way to help out with us.

As for the ground wire, it definitely needs to be connected. I’m just wondering where it needs to be connected. I saw a little Peak of solder and I’m assuming it came from there

 

[peedrah]

I was able to get the plate off and put the belt around the gear selector and motor.

I also found a manual for a similar deck (7280mlses) with a belt size of 16-16.3” (belt number 42A40969F01).

This post (https://www.rtsauto.com/alpine-cm5905-cm5907-and-cm5908-radio-cassette-belt/) has a similar belt path but they recommend a 17" belt.

I also used a piece of twine to measure the approximate belt path and it came to about 17 1/8" without any tension. Between these to posts, I'm just not sure which belt size to go with. I'd buy each of the belts but online, they are charging between $5-$10 each without shipping, so I'm trying to only buy the belt that I need.