VRX775VD
VRX776VD
- 11 -
OK
Confirm
the voice input of
DSP IC
Malfuntion of IC101
NG
Check DSP circuit
Operating iPod voice,
No sound
OK
Confirm
the voice input of
DSP IC
Malfuntion
C147 - C149
NG
Check DSP circuit
Operating visual,
No sound only
Power on
No sound all of source
Confirm
"AMP GUARD"
on display
NG
OK
OK
Check
emitter of Q622
Defective IC501
Malfuntion of IC601
Malfuntion of
8.5V stabillation circuit
(Q622, Q624, Q625)
NG
Check
15pin of J602
OK
OK
Check
3pin of IC105
(3.5V)
NG
Malfuntion of
DSP3.3V circuit
(IC105, L112, L113)
Malfuntion of IC104
NG
Confirm
SCL, SDA line of
DSPcircuit
OK
OK
Confirm
MUTE circuit
Malfuntion of
MUTE circuit
(Q201 - Q214,D204,
IC501)
NG
Power on,
No sound SP-out only
all of source
Check
AMP-STB, AMP-MUTE
OK
OK
NG
Check
the input signal of
IC601
Malfuntion of
IC601, IC501
Malfuntion of IC601
NG
Defective C281 - C285
Malfuntion of
5V DC/DC CON circuit
(IC578),B/U4V circuit
(Q612, R622, IC603)
NG
Check
the connection of
AMP REM
OK
NG
Confirm
the connection of AMP REM,
extra AMP
Malfuntion of
the AMP REM line
connection
No sound only pri-out
(P201)all of source
Operating radio,
No sound only
radio
Confirm
IF OUT of BL101
OK
NG
Malfuntion of BL101
Check DSP circuit
Operating CD/DVD,
No sound only
Confirm
SPDIF line
of DSP IC
OK
NG
Malfuntion of
DVD mechanism,
flexible pwb, J301
Check DSP circuit
Operating Ce-NET in,
No sound
OK
Confirm
the input sound of
DSP IC
Defective
C111 - C115
NG
Check DSP circuit
No sound
