# 問題老人又出來--禾田茂氏問題

**URL:** <https://community.audio100fun.com/t/topic/127>\
**Category:** 前置\
**Created:** [2025年九月4日 04:20 UTC](https://community.audio100fun.com/t/topic/127 "2025-09-04T04:20:33Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![alfcat](https://community.audio100fun.com/letter_avatar_proxy/v4/letter/a/c37758/32.png) [@alfcat](https://community.audio100fun.com/u/alfcat)\
**Post date:** [2025年九月4日 04:20 UTC](https://community.audio100fun.com/t/topic/127/1 "2025-09-04T04:20:33Z")

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前級有 4 組無 label 輸入, 2 組輸出. 如用 Portable Player 輸入, 不論插那一組, 個 Selector 同 Volume 制都是唔運作 = 無用. 但 2 邊 Channel 出到正常聲同音量.

如果我插 Phono Amp 入, Selector 同 Volume 制正常運作, 但只會得 1 面有聲 … 點解會咁?

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**Author:** ![Kevinyip](https://community.audio100fun.com/user_avatar/community.audio100fun.com/kevinyip/32/176_2.png) [@Kevinyip](https://community.audio100fun.com/u/Kevinyip)\
**Post date:** [2025年九月4日 06:43 UTC](https://community.audio100fun.com/t/topic/127/2 "2025-09-04T06:43:20Z")

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我覺得係接觸不良的問題,可能試下換線

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**Author:** ![alfcat](https://community.audio100fun.com/letter_avatar_proxy/v4/letter/a/c37758/32.png) [@alfcat](https://community.audio100fun.com/u/alfcat)\
**Post date:** [2025年九月4日 08:37 UTC](https://community.audio100fun.com/t/topic/127/3 "2025-09-04T08:37:44Z")

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換過幾組唔同嘅線

洗過曬rca頭

最難明嘅係，點解我用portable player輸入

個selector同個volume掣都完全冇作用

不論我插input 1 2 3 4都係咁

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**Author:** ![Kevinyip](https://community.audio100fun.com/user_avatar/community.audio100fun.com/kevinyip/32/176_2.png) [@Kevinyip](https://community.audio100fun.com/u/Kevinyip)\
**Post date:** [2025年九月5日 03:03 UTC](https://community.audio100fun.com/t/topic/127/4 "2025-09-05T03:03:37Z")

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你部係自己diy機?

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<div class="post-metadata">

**Author:** ![smallfat](https://community.audio100fun.com/user_avatar/community.audio100fun.com/smallfat/32/42_2.png) [@smallfat](https://community.audio100fun.com/u/smallfat)\
**Post date:** [2025年九月5日 04:11 UTC](https://community.audio100fun.com/t/topic/127/5 "2025-09-05T04:11:25Z")

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試過用Line in 正常？

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**Author:** ![alfcat](https://community.audio100fun.com/letter_avatar_proxy/v4/letter/a/c37758/32.png) [@alfcat](https://community.audio100fun.com/u/alfcat)\
**Post date:** [2025年九月5日 06:40 UTC](https://community.audio100fun.com/t/topic/127/6 "2025-09-05T06:40:09Z")

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部機一路用開都正常

係裝修之後先出現呢個問題

以前我input one係插 Phono

Input two 就係插portable player

不論播邊個，兩邊有聲出，selector同埋volume掣都工作正常

 ![IMG_20250905_142849](https://community.audio100fun.com/uploads/default/original/1X/7fd8ef28b4b708b3fdc15ea07e5d8d8363c64513.jpeg)

 ![IMG_20250905_142907](https://community.audio100fun.com/uploads/default/original/1X/56bdf10f12b6a63cef80ccbcd1289903c63a3d22.jpeg)

 ![IMG_20250905_142927](https://community.audio100fun.com/uploads/default/original/1X/1de41d45a63683c582d1966425009f7951fbd2f5.jpeg)

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<div class="post-metadata">

**Author:** ![Kevinyip](https://community.audio100fun.com/user_avatar/community.audio100fun.com/kevinyip/32/176_2.png) [@Kevinyip](https://community.audio100fun.com/u/Kevinyip)\
**Post date:** [2025年九月6日 03:17 UTC](https://community.audio100fun.com/t/topic/127/7 "2025-09-06T03:17:28Z")

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可能輸入版上的relay因為震動關係變成虛焊

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<div class="post-metadata">

**Author:** ![alfcat](https://community.audio100fun.com/letter_avatar_proxy/v4/letter/a/c37758/32.png) [@alfcat](https://community.audio100fun.com/u/alfcat)\
**Post date:** [2025年九月6日 11:10 UTC](https://community.audio100fun.com/t/topic/127/8 "2025-09-06T11:10:01Z")

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奇怪是我用唱盤輸入，input一至四都work

可以用selector揀到，只係全部都係只有右邊有聲

但portable player輸入，兩邊channel都有聲

但係個selector同個volume就廢咗

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<div class="post-metadata">

**Author:** ![Kevinyip](https://community.audio100fun.com/user_avatar/community.audio100fun.com/kevinyip/32/176_2.png) [@Kevinyip](https://community.audio100fun.com/u/Kevinyip)\
**Post date:** [2025年九月8日 07:16 UTC](https://community.audio100fun.com/t/topic/127/9 "2025-09-08T07:16:00Z")

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我懷疑phono隻膽有問題, 試下換o左佢