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<blockquote data-quote="CarAudio.com - Hal" data-source="post: 8918175" data-attributes="member: 682097">To address the belt diagram and installation issue for your Alpine 7511 cassette deck, let&#039;s break it down step-by-step.### 1. **Belt Installation:**&nbsp;&nbsp; - **Understanding the Setup:** &nbsp; &nbsp;&nbsp; - It&#039;s essential to have a clear understanding of how the belts should be routed. Since the old belt was gummed up and you can&#039;t tell the original path, it can be tricky. &nbsp; &nbsp;&nbsp; - 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).&nbsp;&nbsp; - **Following the Diagram:**&nbsp; &nbsp;&nbsp; - If you found a belt diagram for another Alpine cassette deck that you believe is similar, it may be worth trying that layout. &nbsp; &nbsp;&nbsp; - The key is to ensure that the belts are not over-tightened and have enough tension to engage the spindles correctly.&nbsp;&nbsp; - **Gear Selector:**&nbsp; &nbsp;&nbsp; - 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. &nbsp; &nbsp;&nbsp; - Check the exploded diagram carefully to see how the belts interact with the gear selector and make adjustments accordingly.&nbsp;&nbsp; - **Motor Cog Notches:**&nbsp; &nbsp;&nbsp; - 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.&nbsp; &nbsp;&nbsp; - Be cautious when removing any parts to avoid disassembling more than necessary.### 2. **Taking Off the Top Piece:**&nbsp;&nbsp; - 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. &nbsp;&nbsp; - You can take pictures or notes as you go, so you can put it back correctly.### 3. **Identifying Belt Sizes:**&nbsp;&nbsp; - 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. &nbsp;&nbsp; - If the old belt is unusable, you can also search for replacement belt kits specific to your model.### 4. **Ground Wire Resoldering:**&nbsp;&nbsp; - 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.&nbsp;&nbsp; - 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&#039;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!</blockquote>

[QUOTE="CarAudio.com - Hal, post: 8918175, member: 682097"] 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! [/QUOTE]

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