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Requesting help with JVC JA-S44 integrated amp

Wharfedale Linton Heritage Speakers

z@m

Member
Joined
Apr 25, 2014
Messages
72
Points
8
Location
BOM
Hello!

This gem of an amp belonged to my grandfather. Powering 3-way standmount-sized JBLs, it has always been a neighbour-complaint-inducing powerhouse.

Lately, I'm noticing weakened power output in both channels, but moreso in the right channel (see attached image of the VU meters).

JVC.jpg

At first I thought it might be the speakers but they sound their usual selves when powered by a Yamaha receiver.

I'm wondering if the forum can troubleshoot the problem and help me fix it - I have metric level electronics knowledge + rudimentary skill with a soldering iron but fair amount of enthusiasm and patience for a repair job.

Thanks,

-Z
 

efernand1

Well-Known Member
Joined
Jul 6, 2012
Messages
5,104
Points
113
Location
Mumbai
Hello!

This gem of an amp belonged to my grandfather. Powering 3-way standmount-sized JBLs, it has always been a neighbour-complaint-inducing powerhouse.

Lately, I'm noticing weakened power output in both channels, but moreso in the right channel (see attached image of the VU meters).

View attachment 43294

At first I thought it might be the speakers but they sound their usual selves when powered by a Yamaha receiver.

I'm wondering if the forum can troubleshoot the problem and help me fix it - I have metric level electronics knowledge + rudimentary skill with a soldering iron but fair amount of enthusiasm and patience for a repair job.

Thanks,

-Z

Hi

This should get you started with information about the amp.....

https://www.hifiengine.com/manual_library/jvc/ja-s44.shtml




https://elektrotanya.com/jvc_ja-s44_sch.pdf/download.html


Incase you need to give it to a skilled experienced technician...there is one based at Mumbai Central (since your location is BOM assuming Bombay)...let me know...
 

z@m

Member
Joined
Apr 25, 2014
Messages
72
Points
8
Location
BOM

efernand1

Well-Known Member
Joined
Jul 6, 2012
Messages
5,104
Points
113
Location
Mumbai
Many thanks for the video and schematic links. Please also let me have the contact details of the technician.

I.D. Electronics, Shop No.4 A, New Mistry Building, Balaram St, Grant Road East, Grant Road, Mumbai, Maharashtra 400007

Phone: 022 2301 2256 After 11am before 730pm Mr Paul Deniz
 
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