What this board does
The CAL-8607 is the power amplifier board of the JRC NVA-1810 series public address system. It takes the audio signal and drives the ship's loudspeaker lines. When it fails, announcements and general alarm tones through the PA system stop or become weak or distorted.
Versions: check before you order
We have seen this board with two PCB numbers. The board in our photo is PCAF00347C, Made in Japan. Another version is marked P79024C, Made in Korea. Both carry the name CAL-8607 P.A Board and use 2SC3856 output transistors, but the layout, relays, transformer and connector numbering differ. Send us a photo of your board and its connectors, and we will compare them with ours before you pay.
Parts that usually fail on a PA board
- Output transistors (2SC3856) and their emitter resistors
- Fuses and rectifier bridges
- Large filter capacitors
- Relays and the driver transformer
If only these components have failed, tell us. A component-level repair can cost less than a board.
What to send for a quote
The model of your PA system, a photo of your board with its PCB number, and a photo of the connectors. A photo of the fault area helps.
Questions buyers ask
Will the Japan version replace the Korea version?
The board name and function are the same, but the PCB versions differ. We compare connector photos with you first, and you decide before paying.
Do you supply the complete NVA-1810 unit?
Ask us. Complete units and other boards are sourced on request.