JVC TH-A5 Service Manual page 7

Removing the DSP board
Prior to performing the following procedure, remove
the top cover, the front panel assembly and jack
board.
1. Untied the harness band and disconnect the harness
from the connector CW2 on the main board.
2. Disconnect the harness from the connector NW11 on
the DSP board.
3. Disconnect the card wire from the connector VW12
on the DSP board.
4. Pull up the DSP board from the front side upwards
disconnecting the connector DW10, DW13, DW14
and DW15.
Removing the main board
Prior to performing the following procedure, remove
the top cover, front panel assembly, DVD
mechanism assembly, jack board and DSP board.
1. Disconnect the card wire from the connector CW4
and CW8 on the main board.
2. Disconnect the harness from the connector CW3 on
the main board.
3. Remove the five screws I attaching the speaker
terminals and jack to the rear panel (see fig.7).
4. Remove the six screws K1 (short) and one screw K2
(long) attaching the main board.
5. When the rear panel is not removed, pull up the
main board from front side.
Removing the power transistor & power IC
Prior to performing the following procedure, remove
the top cover, front panel assembly, DVD
mechanism assembly, jack board, DSP board and
main board.
1. After removing the solder part soldered to the main
board, remove each screw and remove the heat sink
from Power transistor.
2. After removing the solder part soldered to the main
board, remove each screw and remove the heat sink
from Power IC.
(See Fig.9)
(See Fig.10)
CW8
K2
(See Fig.10 and 11)
Harness band
VW12
DSP board
DW15 DW14
Fig.9
K1
Main board
Fig.10
(Each power transistor is fixed)
Solder part Solder part Solder part
Fig.11
Main board
CW2
NW11
DW13 DW10
Heat sink
(to which
power
transistor
is attached)
K1
CW3 Power ICs
CW4
Main board
(Reverse side )
Solder part
(Power IC is fixed)
Heat sink
(to which power IC is attached)
TH-A5
1-7