Motorola Radio Mcs2000 Vol 1 68p81083c20 A Manual

							Troubleshooting9-25
Troubleshooting Chart 1-10, SB9600 BUS RX 
Data
J0403-6,
J0403-18?
Data
U0401-2 pin 6,
U0401-2 pin 5?
Data
U0105-13?
Yes Yes
Yes Voltages on
SB9600 Voltage
Table correct?Correct as required.
Suggestion: Check for
shorted zener diodes.
No
Perform the following while sending data.
i.e. Control Head button press,
Channel Change, Radio OFF/ON.
Check VR0420,
VR0419No
Check R0410,
R0411, C0437No
Check
R0130, U0401No
Check
U0103
Check
R0129
Data
U0105-14?U0105
OK?
Yes
No
NoYes
Data
U0103-63?
Yes
Yes
No
Check
Q0103, VR0428
Repair or replace
U0105
GOTO SB9600
Tx Chart 1-11
Problem
FixedFailure
persists?
Yes
No
CHART 1-10  SB9600 BUS RX
Note:  For SB 9600 operation the SCI RX,
SCI TX, and Busy paths must all function.
START 
						

							9-26Troubleshooting
Troubleshooting Chart 1-11, SB9600 BUS RX 
SB9600 Voltage Table for Charts 1-10 & 1-11
Data
U0103-64?
Data
J0403-6?
Yes
NoBusy
Voltage OK per
SB9600 Voltage
Table
Yes
No
Check Q0401,
R0413, R0415,
R0414, Q0402No
Yes
Check
U0104
Check
J0403
Check
U0103 Perform the following while sending data.
i.e. Control Head button press,
Channel Change, Radio OFF/ON.
START
Note:  Verify Voltages per 
SB9600 Busy Simplified Schematic.
J0403-18
J0403-6
J0403-5
J0403-19
U0401-2, PIN 8
                PIN 4
                PIN 6
                PIN 5
                PIN 7
U0105-11
U0105-13
           -14
U0103-63
R0129PINNOMINAL
VOLTAGEVOLTAGE DURING
MESSAGINGFUNCTION
SB9600 VOLTAGE TABLE
5V
0V
OPPOSITE POLARITY OF J0403-18
OPPOSITE POLARITY OF PIN 6
TRACKS STATE OF PIN 5
TRACKS STATE OF
U0401-7 AND J0403-6
TRACKS STATE OF U0401-7,
J0403-6 AND U0105-13
0
5
5
5
5
0
0
5
5
5
5
5
55
5
0BUS -
BUS +
BUSY
OP Amp Vdd
OP Amp GND
BUS -
BUS +
BUS_SCI
U0105 SCI_SELECT
(Flash Prog/Normal Mode Select)
SCI
SCI_RX
SCI_RX Not Used in
Normal Operation
5 
						

							Troubleshooting9-27
SB9600 BUSY, SimpliÞed Schematic for Charts 1-10 & 1-11
SB9600, SimpliÞed Schematic for Charts 1-10 & 1-11
C0439
470pf
C0438
470pf (5V)
[4.25V]
(0V)
[4.9V](5V)
[0.06V]
(0V)
[1.5V] (0V)
[4.9V]
(5V)
[0V] R0424
4.7K
R0427
2K
R0425
4.7K
Q0406
Q0407 VR0421
R0426
4.7K +5 +5
BUSY_IN
U0103-76 SLIC
BUSY_OUT
U0104-G4
BUSY
J0403-5
( V ) - Voltages when radio is in STEADY STATE
[ V ] - Voltages when radio is asserting busy
          in order to take control of SB9600 BUS
Q0426Q0100
Q0420 Q0400
Q0401Q0402
R0433
47K
R0127
0 C0462
470pf VR0427
14VC0453
470pf VR0429
14VC0436
470pf
C0455
0.1µf
C0437
33pf
VR0420
10VC0435
470pf VR0419
10V
VR0428
10V R0421
4.7K R0449
4.7K
R0106
10K
R0402
10KR0126
47K R0415
2.2K R0412
4.7K
R0409
2.2K R0113
0
R0111
0
R0407
4.7K
R0451
4.7K
U0104 4.7K
47K
J0405 47K 4.7KR0413
10K
R0452
10K R0414
22K R0411
100
R0410
100R0130
0R0129
0 R0021
10KR0020
10K R0408
10K
Q0103VDDVDD
VDDVDD
VDD
VDD
VDD VDDVDD
SCI SELECT
C MOD B / O MOD A/BBOOT_SCI
BUSY SCI_RX_DATAI/O 4 BUS +BUS -
18
6
20
19
5DATA
Z
ASCI TX
C/H CONN
U0401-27
4 6
5--
+
J0403
K4
SCI TX
U0003
K4
SCI RX
U0003
X1
X
X0
U0105 OPEN ONLY
BUS SCI
TP0005 13
14
12
11
TP0004TP0002
63
64
33
32
76
BUSY BUFFERSLICIVA
U0104
K4
MOD B
U0003
G4SCI RX
SCI TX
MOD A
MOD B
  BUSY_ INU0103
MICRO
PROCESSOR
CLOSED ONLY
4
15
5V NORMALLY
0V NORMALLY
BUSY_OUT
B2
C/H CONN J0405
U0104
IN-4
C6
SEE SCI DRIVER SCHEMATIC
SCI_ECHO = NOT PLACED 
						

							9-28Troubleshooting
Troubleshooting Chart 1-12, GPIO 
GPIO
Function?Output
Input
START
Yes
Are
J0403-7,8,16,
20, 21 at the right
voltage
(0 or 5V)?
No Check cable
used to interface
to the radio
Check U0104
and for emergency
check U0510
Check
U0104
Yes Are
VR0424,VR0425,
VR0426,VR0429,
VR0430,VR0431
OK?Are
VR0425,
VR0426, VR0429,
VR0430, VR0431
OK? No
Repair or replace
defective device
Repair or replace
defective componentRepair or replace
defective device Repair or replace
defective device
Repair or replace
defective component Repair or replace
defective device
Yes
Yes Are
Q0414, Q0416,
Q0418, Q0420,
Q0422, Q0424
OK?       Are
Q0428, Q0429,
Q0417, Q0419,
Q0421, Q0423
OK?
Are
R0446, R0450,
R0454, R0458
OK? No
Are
R0437, R0439,
R0440, R0443, R0444,
R0447, R0448, R0451, R0452,
R0455, R0456, R0459,
R0460, R0506
OK?
No
Are
J0403-7,8,16,
20, 21 at the right
voltage
(0 or 5V)?
Yes
Yes
Yes NoYes
No
No
No
Check cable
used to interface
to the radio
CHART 1-12   GPIO
Note:  Verify RSS programming for
                 the GPIO function to be correct. 
						

							Troubleshooting9-29
Troubleshooting Chart 1-13 (1 of 2), Power Control 
Check R0567,
R0569, and
C0562
Set to
High Power
and retest
Using RSS, set current limit
values to zero and program
into radio (F8).  Go into
Transmitter Power Tuning Screen.
See Band Specific
TX Troubleshooting
Chart for proper setupUsing RSS, check 
personality for the
channel of interestIs it set to
Low Power? 
Set to values
within range
specified in Table 1
and retest
Check Q0553,
Q0552, R0586,
R0585 or (R0528)
Check
R0404
Check
U0103
Check
pin K7 of U0104
Check Port K1
(pin H9) of U0104
Tuning
values per
Table 1?
 
Is 
PA_PWR_SET
(U0551 pin 2)
voltage per
Table 2?Is
PA_CNTL
(TP0400)
max band specific
values in Table 
3?
Check U0550, R0571,
C0569, CR0551, CR0550,
C0553, C0554, R0570,
R0554, R0564, R0573
Yes
No
1
To Sheet 2 
						

							9-30Troubleshooting
Troubleshooting Chart 1-13 (2 of 2), Power Control 
GOTO Band Specific
TX Troubleshooting
Chart
Is
PA_CNTL (TP0400)
4.0V?Is
U0550 pin 3
near 4.65V?YesYes
No
GOTO Band Specific
TX Troubleshooting
ChartCheck
R0576, R0582,
C0551 and 9.3V
SupplyIs
U0550 pin 7
>4.0V?No
Check U0550, R0546, R0547,
R0548, R0549, R0557, R0558,
R0559, R0560, R0580, R0583,
R0589, R0598, and C0557Is
CUR_LIM_SET
(U0551 pin 4)
>7.0V?No
Yes
Repair or
replace defective
component Are
Q0554, R0563,
R0573, C0566, R0564,
R0554, R0553, R0577,
and R0581
OK?
No
Yes
No
No
CHART 1-13   POWER CONTROL2of2
1
From Sheet 1 
						

							 
10-1 
Diagrams and Parts Lists 
10 
Notes on Sheet Port Connections, Circuit Block Port Connections and Physical Connectors  . . . . . . . 10-2
Notes on Sheet Port Connections, Circuit Block Port Connections and Physical Connectors  . . . . . . . 10-2
Example of Transceiver Board Block Connection Diagram (110 Watt Radio)  . . . . . . . . . . . . . . . . . . . . 10-3
Low Power Radios Exploded View Diagram and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
Mid Power Radios Exploded View Diagram and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
High Power Radios Exploded View Diagram and Parts List  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-6
Control Head Model I Exploded View Diagram and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7
Control Head Model II Exploded View Diagram and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8
Control Head Model III Exploded View Diagram and Parts List  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-9
Control Head Model I Component Locations and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10
Control Head Model I Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11
Control Head Model II Component Locations and Parts List  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12
Control Head Model II Schematic Diagram  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13
Control Head Model III Component Locations and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14
Control Head Model III Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15
Main Controller and Audio Power AmpliÞer and Voltage Regulators Component Locations  . . . . . . 10-16
Controller Hierarchy Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17
Main Controller Blocks Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-18
Controller, Microprocessor Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-19
Controller, Power Control Schematic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-20
Controller, Audio Blocks Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-21
Controller, Hear Clear Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-22
Controller, ASFIC Schematic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Controller, Interface Blocks Diagram  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-24
Controller, IO RSSI Buffers Schematic Diagram  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-25
Controller, Emergency Ignition Schematic Diagram  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-26
Controller, SCI Drivers Schematic Diagram  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-27
Controller, IO Buffers Schematic Diagram  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-28
Controller, Audio Power AmpliÞer and Voltage Regulators, Low and Mid Power Schematic Diagram .  10-29
Controller, Audio Power AmpliÞer and Voltage Regulators, High Power Schematic Diagram  . . . . . . 10-30
Controller Parts List, Common Parts, Continued . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-32
Controller Parts List 800 MHz, 15W Unique  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-34
Controller Parts List, 800 MHz 35W Unique  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-35
Controller Parts List, 900 MHz 12W Unique  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-36
Controller Parts List, VHF 110W Unique  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-37
Controller Parts List, UHF1 110 W Unique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-38
Controller Parts List, Non-Common Parts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-39
Integrated Circuits with Pin-Out Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-40 
						

							 
10-2 
Notes on Sheet Port Connections, Circuit Block Port Connections 
and Physical Connectors 
On the schematic drawings there are three different signal connection markers as described below. 
Sheet Port Connection 
The Sheet connection appear as  or  . These markers indicate that the signal shown on a given page 
continues to another schematic page. Typically the arrow direction indicates whether it is an input of output. These 
are used because the complete circuit scheme could not Þt on one schematic sheet. 
Circuit Block Port Connection 
Besides the need to show page to page connections, the schematics also indicate interblock connections. While the 
radio is fabricated on one or two PCBs, it is actually composed of several functional circuit blocks which are 
interconnected. For example some signals from the receive front end block are connected to the Synthesizer circuit 
block. While there is no connector, and these two blocks are connected only by copper traces, the schematic system 
creates an imaginary point at which a runner for a given signal from the two blocks meet and assigns a connection 
number. This number typically appears on the schematic as IF#### with a  symbol shown. The interconnect 
diagram shows many of these blocks which are connected. 
Physical Connector 
Actual connectors such as the Accessory connector are shown with reference designators Jxxx or Pxxx. These represent 
physical connectors. 
Schematic Hierarchy 
Many of the MCS 2000 schematics are created in a hierarchical fashion. This is similar to a computer directory/
subdirectory format. Like in a computer where there can be a mix of Þles and subdirectories under a given directory, 
some schematic sheets in the manual contain blocks or components, or both, in various sheets. 
Pages that follow contain the component level breakdown of the blocks. Components refer to discrete electrical 
elements like resistors and capacitors. Blocks refer to a logical grouping of schematic components which appear in 
detail on following schematic sheets. This representation allows the reader to start with an overview of the schematic/
circuit topology and navigate into more and more component level detail. Schematic blocks are represented by 
rectangular blocks shown by dashed outlines and contain the title of the schematic sheet which they represent. 
Figure 10-1   Schematic Diagram Hierarchy
Regulator and 
Audio Power Amplifier Main Controller
Power Control Interface
I/O and 
RSSI BufferEmergency 
IgnitionHear ClearASFIC
SCI DriversI/O Buffers
         RF
See Volume:
   2a: 800 MHz
   2b: VHF
   2c: UHF
   2d: 900 MHz
MicroprocessorAudio
(Model I, Model II or Model III)ControllerControl Head 
						

							 
10-3  
Figure 10-2   Example of Transceiver Board Block Connection Diagram (110 Watt Radio)
PA  BOARD
MEPC-97057-O/None
BATTERYANTENNA+-
GND
VSUM
VFWD BUF
SPK -
SPK +
CL UNSW 5V
UNSW 5V
Vaud
Vdd
+5V
PWR RST
SWB+
A+
B+ ON/OFF
CLEAR
AUPA EN
B+ IGNITION
RX AUDIO
GND
GNDD
A+ CNTL
PA CNTL
CURR SENSE +
CURR SENSE -
PA TEMP
K 9.1V
V FORWARD
V CNTL
GND
GNDD
A+ 
PA CNTL
CURR SENSE +
CURR SENSE -
PA TEMP
K 9.1V
V FORWARD
V DRIVEAUDIO MOD
SYN SEL
LOCK DET
ROSC SEL
9.3
CLK
SPI TX DATA
2.1 MHz
RF REG 5V
GND
AUD MOD
SYN SEL
LOCK DET
ROSC SEL
9.3
CLK
SPI TX DATA
2.1MHz
RX CNTL SRC
ZIF SEL
DISC
SQUELCH
RSSI
LO INJ
AUDIO AND POWER
REGULATION
SECTION
(REFER TO VOLUME I)
SYNTHESIZER
SECTION
RECEIVER FRONT ENDRECEIVER
BACK END RECEIVER IF
CONTROLLER
COMMON
(LOGIC)
SECTION
(REFER TO 
VOLUME I)
INTERCONNECT 5INT 8
IF IN
RX IN GND
TX INJ
677 7
2 8 1 9 11 1210 543
INTERCONNECT 7
INTERCONNECT 2
J9601
J3500J9500
J3501
9.3
INTERCON 3
INTERCONNECT 1
INTERCON 4
6
1 21 2 2 8 1
911
12 10 543
7
Block
Interconnect
Physical
Connector 
						

							 
10-4
6
7
8
14
15
16
18
19
8
5
4
3
2
1
Exploded View Parts List, Low Power
*  Number of screws can vary depending on the model.ITEM
NO.MOTOROLA
PART NO. DESCRIPTION
1 3205931V01 Gasket, Front Cover 
2 1505908V02 Top Cover
3 3205934V01 Gasket, Top Cover
4 2605652W02 Pressure Plate
5 5584300B04 Handle, 800 MHz only
6 2604802K01 PA Shield, 800 MHz only
7 4205938V01 Clip Spring, 2 pcs.
8 0310907C69 Screw, M3X0.5X10,6 pcs
*.
9 0905902V01 Power Connector
10 3205457Z02 Gasket, Power Connector
11 0905901V01 Antenna Connector
12 320547Z01 Gasket, Antenna Connector
13 4105783W01 Spring Diode
14 2705920V04 Chassis, Low Power
15 4205940V01 Retainer, Accessory Connec-
tor Cable
16 HLN6412 Accessory Connector
17 5405942V01 Label
18 3205935V01 Gasket, 25 D connector
19 2604555E01 Board Slot Shield, 
800 MHz only
17
10
11
12
13
9
 
Low Power Radios
Exploded View Diagram and Parts List