22
TK-790/
(
B
)
/H
(
B
)
DISASSEMBLY FOR REPAIR (TK-790/(B))
1. Removing the Case and Shield Cover
1. Remove the 9 screws (
1
), and remove the upper and
lower halves of the case. (Remove the 4 screws holding
the upper half and the 5 screws holding the lower half.)
2. Remove the shield cover (
2
).
2. Removing the TX-RX Unit (X57-561 A/3)
1. Remove the 7 screws (
3
), and remove the PLL shield
case.
2. Remove the connector (CN201) and coaxial plugs
(CN104, CN203) from the final unit, and remove the flat
cable (CN202) upwards from the control unit (CN502).
3. Remove the 5 screws (
4
).
5
3
3
3
3
3
3
3
4
1
1
1
1
1
4
4 4
4
7
7
7
7
7
7
7
5
6
2
1
1
1
1
CN203
CN104
CN201
Final
unit
TX-RX
unit
Control
unit
3. Removing the Final Unit (X57-561 C/3)
1. Remove the 2 screws (
5
) holding the power module to
the frame.
2. With a screwdriver, remove the leaf spring (
6
) holding
the Q2 to the frame.
3. Desolder the power module.
4. Remove the 2 screws holding the lead terminal from DC
connector (2P) on the rear.
5. Remove the 8 screws (
7
) holding the PC board.
6. Desolder CN4 on the antenna connector.
