XV-M565BK/M567GD
1-28
5. Audio Volume
Power
supplied correctly
to each IC?
to Power Supply
Volume
YES
NO
OK
Is sound
signal output
from J701 (pin
jack)?
Voltage of
Q791 collector at
-5.5V?
Is
digital signal
input to
IC703"2"?
NO
Check IC703
and PLL.
YES
Is digital
signal output from
IC703"10", "13", "16"
and "19"?
Replace
IC703.
Check IC751, IC741
and their periphery.
*
Changing over the cutoff frequency of analog LPF
When fs=44.1kHz or 48kHz,
Microcomputer port FS2 is at the "L" level,
and Q741 and Q751 are turned ON.
When fs=96kHz,
Microcomputer port FS2 is at the "H" level,
and Q741 and Q751 are turned OFF.
YES
YES
NO
NO
NO
YES
IC701 is
checked