Motorola MCS 2000 Service Instructions

December 6, 2004 68P81083C20-D
9-32 Troubleshooting Troubleshooting Chart 1-13 (2 of 2), Power Control
Troubleshooting Chart 1-13 (2 of 2), Power Control
GOTO Band Specific
TX Troubleshooting
Chart
Is
PA_CNTL (TP0400)
<max band specific
values in
Table 3?
Yes
Check
R0404
Check
U0103
Check
pin K7 of U0104
No
No
No
No
No
SPI_CLK
at U0551 pin 10
during tuning?
Yes
DA_SEL
(U0551 pin 6) goes
low during
tuning?
Yes
SPI_CLK
on pin 67 or
U0103?
Yes
Yes
Check
U0103
Check
R0403
Check
U0551
SPI_DATA
at U0551 pin 1
during tuning?
Yes
SPI_DATA
on pin 66 of
U0103?
Yes
Check R0587, R0550,
C0551, R0551, U0550,
C0231, RT5610,
CR0550, CR0551,
C0555, C0553, C0554
Is
U0550 pin 1
>4.0V?
Is
U0550 pin 3
near 4.65V?
Yes
Yes
No
GOTO Band Specific
TX Troubleshooting
Chart
Check
R0576, R0582,
C0551 and 9.3V
Supply
Is
U0550 pin 7
>4.0V?
No
Check U0550, R0546, R0547,
R0548, R0549, R0557, R0558,
R0559, R0560, R0580, R0583,
R0589, R0598, and C0557
Is
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
MAEPF-25967-O
1
From Sheet 1

Motorola MCS 2000 Specifications

General

Brand	Motorola
Model	MCS 2000
Category	Radio
Language	English