Japetus
Nightshift
Dear AK'ers,
after recently solving Power Supply Issues with my A-27 (Pioneer A-27 Power Supply Issue | Audiokarma Home Audio Stereo Discussion Forums , thanks to AK'ers Merlynski and Watthour), I thoroughly tested all functions and did some extensive listening sessions.
During those sessions, after turning on the A-27, in some cases one channel (usually right) is missing or coming through (moderately muted) with sizzling and crackling noise.
Repeated commands to the according relays to open and close (by turning the speaker output selection knob back and forth) solves this issue quickly.
To me it seems as if relay(s) do not make perfect contact, at least not as supposed to be.
The relays are ASR-047 (both RL2 and RL3) on Output Terminal Assembly (GWX-211, see pics of circ. and foil).
Is there a direct replacement for that type of relay?
If not, is there a replacement that can be used, but needs a different pinout (and maybe some mechanical adaptations on the PCB)?
If both is not an option, can the relays be restored by disassembling and cleaning the contacts?
Best regards,
Frank
after recently solving Power Supply Issues with my A-27 (Pioneer A-27 Power Supply Issue | Audiokarma Home Audio Stereo Discussion Forums , thanks to AK'ers Merlynski and Watthour), I thoroughly tested all functions and did some extensive listening sessions.
During those sessions, after turning on the A-27, in some cases one channel (usually right) is missing or coming through (moderately muted) with sizzling and crackling noise.
Repeated commands to the according relays to open and close (by turning the speaker output selection knob back and forth) solves this issue quickly.
To me it seems as if relay(s) do not make perfect contact, at least not as supposed to be.
The relays are ASR-047 (both RL2 and RL3) on Output Terminal Assembly (GWX-211, see pics of circ. and foil).
Is there a direct replacement for that type of relay?
If not, is there a replacement that can be used, but needs a different pinout (and maybe some mechanical adaptations on the PCB)?
If both is not an option, can the relays be restored by disassembling and cleaning the contacts?
Best regards,
Frank