Motorola MTR3000 User Manual

Troubleshooting 4-23
Figure 4-9 MTR3000 power up block diagram
4.3 Troubleshooting
4.3.14 Disassembly and Reassembly Procedures
1. Make sure the station power is turned off at the breaker to the AC or DC source.
2. Disconnect the cables, as follows:
- Rx cable from Receiver Module
- Exciter-to-PA coaxial Cable
- Front Panel USB cable (if connected)
- Front Panel Mic cable (if connected)
- Front Panel Speaker cable (if connected)
- Front Panel External Reference cable (if connected)
- Front Panel Ethernet cable (if connected)
3. Remove the two screws holding the transceiver assembly to the bottom plate.
4. Pull forward on the cast knobs (above the front panel that projects horizontally from the
Exciter and Receiver module), carefully slide the transceiver assembly (Exciter Module,
Receiver Module, Station Control Module (SCM)) out of station.
5V – P3200M3-A3,B3,C3
8V – P3200M3-A4
J3600M3 – A9, To Exciter
J3601M3 – B12, To Receiver
10V_EX – P3200M3-A14,B14 J3600M3 – B8, To Exciter
10V_RX – P3200M3-A15,B15 J3601M3 – A13, To Receiver
14.2V – P3200M3-A1,B1,C1
J3600M3 – B0, To Exciter
J3601M3 – B13, To Receiver
U3831M4
9.3V
U3838M4
5VA, AUDIO SECTION
U3893M4
12VA, OCXO
Only populated for 800/
900 MHz kit
U3874M4
1.875V
PG
U3801M4
3.3V
U3883M4
3.3VA,
STA
TION
REFERENCE
U3906M4
2.775VA,
STATION
REFERENCE
U3826M4
1.2V, FPGA CORE
PG
U3850M4
1.4V,
RXOMAP
CORE
U3800M4
1.4V,
TXOMAP
CORE
PG
U1404M1
3.6V
U1402M1
MAKO
2.775V,
Trident SSI
buffer supply
U1406M1
2.2V
ENABLE
1
2
3
4
5
6
7
NOTE:
- PG => power-good signal from the switch
or
regulator. Open-drain output, active high
indicate power is good.
- Number in the block diagram indicate power-
on sequence.

Motorola MTR3000 Specifications

General

Brand	Motorola
Model	MTR3000
Category	Accessories
Language	English