Denon HEOS Amp HS2, Service Manual

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2.1.2. Another HEOS play
No audio output from another HEOS.
See "Audio Check PATH" ( 28 page ).
CHECK1 INPUT
Another HEOS output OK? AUX IN / LINE IN
CHECK2 INPUT
Another HEOS output OK? OPT IN
CHECK3 INPUT
Another HEOS output OK? USB IN
YES
YES
Check the IC53 (E-Vol) BLOCK
Check input signal.
AUX IN : 41,42pin
LINE IN : 45,46pin
Check output signal.
34,35pin
Check the circuits around the
E-Volume(IC53) and replace
any faulty parts.Check the
power (+8VA,-8V_A)Check the
control signal (VOL_DA,VOL_
CL) during the power on settting.
NO
Check the IC21 (DIR 1) and
IC31(PLD) BLOCK
Check signal.
OPT IN (SPDIF) : IC 31 2,91pin
IC21 33pin
DIR output digital data : IC21
16,17,18,19pin
Check the circuits around the
E-Volume(IC53) and replace
any faulty parts.
Check the power (+8VA,-8V_A)
Check the control signal (VOL_
DA,VOL_CL) during the power
on settting.
Check the IC35 (DAC 2) and
IC31(PLD) BLOCK
Check digital signal.
DIR output digital data : IC31
85,86,87,88pin
DAC2 intput digital data : IC35
12,13,14,15pin
Check analog signal
DAC2 outtput analog data : IC35
6,7pin
Check the IC53 (E-Vol) BLOCK
Check input signal.
Analog signal (OPT IN):
49,50pin
Check the USB BLOCK
Check signal.
USB POWER 5V : IC41
6,7,8pin
USB POWER cont signal(USB_
HPEN_0) : CN41 51pin
USB signal : CN41 29,31pin
Check the Core Module and joint pin.
YES
NO
YES
YES
NO
NO
Check the IC35 (DAC 1) and
IC31(PLD) BLOCK
Check digital signal.
Core Module output digital data
: IC31 34,35,36,37pin
DAC1 intput digital data : IC35
12,13,14,15pin
Check analog signal
DAC1 outtput analog data : IC35
6,7pin
Check the IC53 (E-Vol) BLOCK
Check input signal.
Analog signal (Core IN):
53,54pin
YES
YES
NO
Check the IC21 (DIR 1) and
IC31(PLD) BLOCK
(ADC part of DIR1)
Check analog signal
DIR2 input analog data
: IC21 47,48pin
Check digital signal.
DIR1 output digital data
: IC21 14pin
IC31 81pin
DIR1 input digital clk
: IC21 7,8,9pin
IC31 82,83,84pin
Check the Core Module and
IC31(PLD) BLOCK
Check signal
Core Module input digital
data(I2S) : CN41 24pin
IC31 33pin
YES
NO
YES
YES
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