Hitachi UR 18DSL2 Service Manual page 3

Trouble Check method
(i) Put the Model UR 18DSL2 in a place
(3) AM radio
without surrounding walls or buildings
broadcast
blocking radio waves, and without
cannot be
noise-producing equipment (e.g.,
received.
fluorescent lamp, personal computer,
battery charger, compressor), tune in an
easily received frequency, and then
adjust orientation of the Model
UR 18DSL2.
(ii) Disassemble the Model UR 18DSL2, and
then check whether all connectors are
properly connected.
(i) Put the Model UR 18DSL2 in a place
(4) FM radio
without surrounding walls or buildings
broadcast
blocking radio waves, and without
cannot be
noise-producing equipment (e.g.,
received.
fluorescent lamp, personal computer,
battery charger, compressor), tune in an
easily received frequency, and then
adjust orientation of Rubber Antenna [1].
(ii) Disassemble the Model UR 18DSL2, and
then check whether all connectors are
properly connected.
(i) Connect the music player using the
(5) Music cannot
proper connection cable, and then check
be played in
whether music can be played.
AUX mode.
(ii) Connect a normal mobile music player,
and then check whether music can be
played.
(iii) Disassemble the Model UR 18DSL2,
and then check whether all connectors
are properly connected.
(iv) Replace USB PCBA [59], and then
check whether music can be played.
Check result
The broadcast can be Radio waves are blocked by surrounding
received. walls or other structures. Orientation of the
Model UR 18DSL2 (built-in antenna) is
inappropriate.
Reception is affected by noise from
nearby equipment.
The broadcast cannot be Go to the next check.
received.
Some connectors are Same as on the left.
disconnected.
All connectors are Controller PCBA [17] and Function PCBA
properly connected. [20] are abnormal.
The broadcast can be Radio waves are blocked by surrounding
received. walls or other structures. Orientation of
Rubber Antenna [1] is inappropriate.
Reception is affected by noise from
nearby equipment.
The broadcast cannot be Go to the next check.
received.
Some connectors are Same as on the left
disconnected.
All connectors are Controller PCBA [17] and Function PCBA
properly connected. [20] are abnormal.
Music can be played. The connection cable is broken.
Music cannot be played. Go to the next check.
Music can be played. The mobile music player is faulty.
Music cannot be played. Go to the next check.
Some connectors are Same as on the left.
disconnected.
All connectors are Go to the next check.
properly connected.
Music can be played. USB PCBA [59] is abnormal.
Music cannot be played. Controller PCBA [17] and Function PCBA
[20] are abnormal.
-10-
Cause
Move the Model UR 18DSL2 to a better reception
environment (e.g., near a window), and then adjust
orientation of the Model UR 18DSL2.
Keep the Model UR 18DSL2 away from the noise-source
equipment.
Go to check method (3)-(ii).
Connect the disconnected connectors.
Replace Controller PCBA [17] and Function PCBA [20].
Move the Model UR 18DSL2 to a better reception
environment (e.g., near a window), and then adjust
orientation of Rubber Antenna [1].
Keep the Model UR 18DSL2 away from the noise-source
equipment.
Go to check method (4)-(ii).
Connect the disconnected connectors.
Replace Controller PCBA [17] and Function PCBA [20].
Ask the customer to check whether the connection cable is
broken.
Go to check method (5)-(ii).
Ask the customer to check whether the mobile music
player is faulty.
Go to check method (5)-(iii).
Connect the disconnected connectors.
Go to check method (5)-(iv).
(Replace USB PCBA [59].)
Replace Controller PCBA [17] and Function PCBA [20].
Corrective action