Kenwood TH-D74E Service Manual page 29

Connection cable
Connection cable consists of 2 pieces of flat cable assembly
(X42-3510-10), to extend its cable length double for connection
between two PCBs.
For repair and adjustment, use this connection cable to connect
a Control PCB and a TX-RX PCB by inserting the connection
cable to connectors on these PCBs.
Note:
If Control PCB and TX-RX PCB are disassembled from the
main chassis, there may possibly cause short-circuit, electrical
shock or the high-frequency signal interference.
To verify the transmit state, be sure to keep Control PCB and
TX-RX PCB assembled in a chassis.
Besides, transmission without a heat sink attached may
possibly cause the device to be damaged.
Be sure to verify the transmit performance with LOW/EL
transmit power transmitted in a short amount of time.
4.4 Adjustment Mode
Outline
(1) Set the transceiver to adjustment mode and change each
setting data item.
(2) This mode is used when the PCBs are replaced at a
service center or at the time of making transceiver
readjustments.
Note:
All adjustment data is stored in the flash memory (TX-RX
1/7: CONTROL IC705).
Operation procedures in adjustment mode
(1) Turn ON the transceiver.
(2) Short-circuit two lands (SET and GND) on the component
side of the TX-RX unit (1/7) to set the transceiver to
adjustment mode.
When the transceiver is set to adjustment mode, the
adjustment items for the battery will be displayed.
Short
(No.RA044<Rev.001>)1-29