58
4.2. Analog audio
No sound is output
Is the voltage of ±8V supplied to
SIDE CNT B'D CP6 13-16 pin?
Is the audio signal transmitted to
BALANCE OUT B'D N4001 and
N4002?
Is the serial data for electronic volume
transmitted to FRONT CNT B'D
CP108 18,19pin?
Once more, checking the connection of the connector.
When can specify the trouble of the channel and function, Check signal route where it
corresponds.
The power supply of ±8V is repaired.
The pre ampli
fi
er is repaired.
Is the connector correctly connected
with HDMI B'D?
Connect the connectors properly.
The HDMI B'D is repaired.
YES
NO
NO
NO
YES
YES
NO
Is the voltage of +12V supplied to
emitter of Q8003, and voltage of
-12V supplied to emitter of Q8004 of
BALANCE OUT B'D?
The power supply of ±12VA is
repaired.
NO
YES
Is the voltage of +12V supplied to
the output terminal of U8001 of
BALANCE OUT B'D?
The power supply of 12V_RELAY is
repaired.
NO
YES
Does the output reray of preout
operate normally?
YES
YES
Summary of Contents for AV7005/N1B
Page 62: ...62 Personal notes ...
Page 64: ...64 BLOCK DIAGRAM ...
Page 139: ...139 R5F3650KNFB HDMI U5500 ...
Page 146: ...146 IS42S32200E6TL HDMI U1602 IS42S32200E6TL Block diagram ...
Page 155: ...155 AK4424ET HDMI U3800 U3801 AK4424ET Block Diagram ...
Page 156: ...156 AK5358BET HDMI U3802 AK5358BET Pin Function ...
Page 160: ...160 HY27UF081G2A TPCB Block Diagram ...
Page 170: ...170 2 FL DISPLAY FLD 19 ST 02GINK FRONT Z1001 PIN CONNECTION GRID ASSIGNMENT ...
Page 171: ...171 ANODE CONNECTION ...
Page 172: ...172 VFD GP1261AI FRONT Z1002 PIN CONNECTION PATTERN DETAIL ...