Marantz sr-18 u - No Sound from SPK on AC-3;DTS Decode; No Sound from SPK on PCM STEREO(Digital In)

64
no
DIR circuite(P604)
no
has any trouble
yes
no
no
DAC circuite(P604)
yes
has any trouble
yes
(DIR is no problem)
yes
Volume,Tone, or HDAM
(on P104)has any trouble.
Pre out relay has any trouble.
no
DSP (Q601 or Q651)
has any trouble
(DAC is no problem)
yes
DSP(Q601) input stage has
any trouble.
to be check QR06
No sound
from SPK on PCM
STEREO(Digital In)
Analog Stereo
and 6-direct
are OK ?
P704 or P754 has problem
Test tone is
OK ?
Pre output is
OK ?
Encode status
LED shows ?
Source Direct
is OK ?
Volume,Tone, HDAM or
no Pre out relay has any trouble.
To be check P104
yes
DIR(QR01) or Q601
no no no
has trouble
yes yes yes
no
DIR(QR01) or QR06 no
L/R DAC has trouble
has any trouble.
to be check
signal(SDIDR)
yes yes
Error Mute circuite has Q601 or Q651 has trouble.
trouble.
To be check QR04 or QR05
No sound
from SPK on
AC-3/DTS decode
6ch Direct
is OK ?
P704 has problem
Test tone is
OK ?
Pre output is
OK ?
DD,DTS,PCM
are shown?
DD,DTS,PCM
are shown?
DAC & DSP are no problem
Decoding is no problem
P604 has trouble
PCM S-Dirct
is OK?
L/R DAC is no problem
DIR & Q601input is no problem