2. AUDIO
2.1. AUDIO CHECK
2.1.1. Analog OUT
No audio output from Speaker out.
CHECK1
INPUT
Preout OK?
AUX IN / LINE IN
CHECK2
INPUT
Preout OK?
OPT IN
CHECK4
INPUT
Preout OK This Phone / Online music
CHECK3
INPUT
Preout OK?
USB IN
YES
YES
YES
Check the IC53 (E-Vol)
BLOCKCheck input signal.
AUX IN : 41,42pin
LINE IN : 45,46pin
Check output signal.34,35pin ,
28,29pin , 7,8pin
Check the MUTE BLOCK
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 PREOUT_MUTE signal.
PREOUT_MUTE : CN41 58pin
Check the power for MUTE and replace any faulty
parts. +5V_ST , -8V_A
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 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 Core Module and joint pin.
YES
NO
NO
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 audio output from SW.
Check the IC54 (OP Amp) BLOCK
and IC53 (E-Vol) BLOCK
Check input signal.
SW signal : IC54 1,7pin
IC53 25pin
IC53 4pin
NO
NO
YES
NO
NO
YES
YES
26
Summary of Contents for HEOS Amp HS2
Page 8: ...Personal notes 8...
Page 28: ...AUDIO CHECK PATH AUX IN LINE IN 28...
Page 29: ...OPT IN 29...
Page 30: ...This Phone Online music USB IN 30...
Page 31: ...EASY SETUP 31...
Page 34: ...Personal notes 34...
Page 49: ...Personal notes Personal notes 49...
Page 58: ...PCM9211 Pin Discriptions 58...
