UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Panasonic AG-6400 Hi-Fi audio problem

TapeTwoK · 1st May 2019, 5:14 pm

Hi all,

I’ve just recently got my hands on a Panasonic AG-6400 portable VCR but unfortunately noticed that the Hi-Fi (or what Panasonic calls HD) audio circuit isn’t working correctly. I can hear the live feed from the headphone jack with perfect clarity, but playback or recording with Hi-Fi audio produces popping when recordings, or a very brief, low level crackly signal that fades into popping when playing a Hi-Fi stereo tape.

I have experienced a similar issue on NV-M10 camcorders and know it is capacitor related, but I have never personally carried out the repair before.

I have the service manual, but before I go digging through the block diagram and diagnosing each and every cap, I wondered if anyone has done this repair before, and knows of which caps tend to be the most troublesome?

All help is appreciated. If no one can help, I will attempt to figure it out myself and post the results for future reference.

Many thanks!

1st May 2019, 5:14 pm	#1
TapeTwoK Triode Join Date: Dec 2018 Location: Southampton, UK. Posts: 15	Panasonic AG-6400 Hi-Fi audio problem Hi all, I’ve just recently got my hands on a Panasonic AG-6400 portable VCR but unfortunately noticed that the Hi-Fi (or what Panasonic calls HD) audio circuit isn’t working correctly. I can hear the live feed from the headphone jack with perfect clarity, but playback or recording with Hi-Fi audio produces popping when recordings, or a very brief, low level crackly signal that fades into popping when playing a Hi-Fi stereo tape. I have experienced a similar issue on NV-M10 camcorders and know it is capacitor related, but I have never personally carried out the repair before. I have the service manual, but before I go digging through the block diagram and diagnosing each and every cap, I wondered if anyone has done this repair before, and knows of which caps tend to be the most troublesome? All help is appreciated. If no one can help, I will attempt to figure it out myself and post the results for future reference. Many thanks!