Newbie repairing Hafler DH220 advice needed - Page 5

schubert · 26th October 2011, 06:07 PM

How did this turn out?

Simbl · 13th November 2011, 03:36 AM

Well i went through a checked everything for continuity, I checked all the transistors they were all fine I found a couple of resistors and a Zener diode that we're shorted in the circuit so i bought wired wound replacements put em in and relises out of the circuit they were fine . I replaced them anyway just to be safe. I replaced the shorted diode, I have a resister left I need to squeeze in somehow. I've been pretty busy mixing lately and i havn't got the funds to get a temporary amp or have the time to do repairs luckily I have good set of cans. I should have some free time in a week or so. I started using it in mono and it sounds really rough isolated the left channel as instructed in the manual and i'm using the right. It's like someone turned the mid down or it's out of phase on the amp weird.... I'm starting to think it's the tranny I'll have to read up on how to measure/ test a tranny.

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26th October 2011, 06:07 PM	#41
schubert diyAudio Member Join Date: Sep 2008 Location: Pennsylvania, USA	How did this turn out?

13th November 2011, 03:36 AM	#42
Simbl diyAudio Member Join Date: Jul 2011	Well i went through a checked everything for continuity, I checked all the transistors they were all fine I found a couple of resistors and a Zener diode that we're shorted in the circuit so i bought wired wound replacements put em in and relises out of the circuit they were fine . I replaced them anyway just to be safe. I replaced the shorted diode, I have a resister left I need to squeeze in somehow. I've been pretty busy mixing lately and i havn't got the funds to get a temporary amp or have the time to do repairs luckily I have good set of cans. I should have some free time in a week or so. I started using it in mono and it sounds really rough isolated the left channel as instructed in the manual and i'm using the right. It's like someone turned the mid down or it's out of phase on the amp weird.... I'm starting to think it's the tranny I'll have to read up on how to measure/ test a tranny.

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