Maxon SP200/210 Radio | SP200/210 |
REMOVING AND REPLACING THE MAIN ASSEMBLY
Removal
With the battery pack removed, there are four, black,
These can now be removed along with the black, cross head screw holding the accessories socket dust cover.
Unscrew the antenna and slide off the volume control knob.
Replace the battery but do not push all of the way home. Gripping the lower sides of the battery, and the lower sides of the radio lever the two apart at the bottom of the radio to separate the two.
Withdraw the module from the case.
Remove the battery from the module.
This level of disassembly will be enough for test purposes.
Note: A screwdriver, or similar object, should never be used to force open the radio as the sealing gasket is likely to be damaged.
To reassemble the radio, carry out the above instructions in reverse, ensuring that the seal is pushed down into the cover. Take care not to damage the sealing gasket.
With the two parts of the radio separated, for servicing, it will be necessary to link the two pcbs using the
LOCATION OF ADJUSTMENT POINTS
C208 L203
TCXO
TP1
RF PCB
Figure 4-14 – Adjustment Points
4.5.3 PLL Alignment
Before any alignment is carried out to the transmitter, or receiver, it is necessary to align the Phase Locked Loop (PLL). The PLL consists of the Rx VCO, Tx VCO and TCXO.
If the PLL is out of lock, an audible warning will be heard UL will appear on the LCD display.
Note: This alert will also be heard when a channel is programmed out of the range of operation of the radio, or it is not programmed at all.
Note: If the power save parameter is programmed there will be a periodic change at TP1. Measurement should be based on the steady state voltage, with power save off.
In order to carry out repairs, the two halves of the radio may need to be linked using the flexi- pcb, ME110016.
This is part of the Service Kit and the Interface Box and leads will also be required for some of the tests.
Connect the radio under test to the Test Equipment.
INSTALLATION, COMMISSIONING & ALIGNMENT - | Issue 1.0 |
Page | 03/01 |