Motorola Astro Digitalport Saber Detailed 68p81076c10 A Manual

9-6
Standard Bias 
TableTable 3, below, outlines some standard supply voltages and system clocks 
which should be present under normal operation. These should be checked as 
a first step to any troubleshooting procedure.
Table 2 .  Standard Operating Bias
Signal Name Nominal Value Tolerance Source
UNSW_B+7.5Vdc6.0-9.0VdcJ401
SW_B+ 7.5Vdc 6.0-9.0Vdc Q207
+5V
+5VA5.0Vdc
5.0Vdc±10%
±10%U409
U410
RESET 5.0Vdc +0.7, - 1.0Vdc U407
POR*5.0Vdc+0.7, - 1.0VdcU206
DSP_RST*
ADSIC_RST*5.0Vdc
5.0Vdc+0.7, -1.0Vdc
+0.7,...

11-1
Troubleshooting 
Waveforms
11
IntroductionThis section contains images of waveforms which may be useful in 
verifying operation of certain parts of the circuitry. These waveforms 
are for reference only; the actual data depicted will vary depending 
upon operating conditions.
Waveforms
Figure 14 . Waveform W1
103 Acquisitions
Tek stopped:
T
1
Ch1T
M 200us  Ch1        -680mV
W1: Switched Regulator Clock Out
Trace 1 - (U409)LX measured with radio in
standby mode with UNSW_B+ at 7.5VDC. 2.00V...

11-2
Figure 15 . Waveform W2
2893 Acquisitions
Tek stopped:
T
2
Ch3 Ch1T
1
3
M 20.0us  Ch1           2.2 V
W2: DSP SSI Port RX mode.
Receiving
1KHz tone @ 3KHz deviation, -60dBm.
Trace 1 - RFS
Trace 2 - RXD
Trace 3 - SCKR (2.4/0.600MHz)Ch1 Freq
19.991kHz
Low signal
amplitude
5.00V
5.00V
1
5.00V Ch2
MAEPF-24377-A
Note 1: Typically SCKR is a 2.4 MHz clock. In low power
modes, as shown here, SCKR is 600KHz.
Figure 16 . Waveform W3
T
T
2836 Acquisitions Tek stopped:
T
3
Ch1 Ch2
Ch3
2
1
M  5.00us  Ch1...

11-3
Figure 17 . Waveform W4
T
13 Acquisitions
Tek stopped:
T
1
Ch1
M  10.0us  Ch1            2.2 V
W4: ABACUS programming
captured during mode change.
Trace 1 - (ADSIC) SBIMAEPF-24379-OCh1 Freq
74.610kHz
2.00V
Figure 18 . Waveform W5
34513 Acquisitions
Tek stopped:
T
3
Ch3
1
2
Ch1 Ch2
M  5.00us  Ch1            2.2 V
Note 2: Since these signals are a differential
current loop these voltages are very low.MAEPF-24380-A
2
W5: ABACUS/ADSIC Interface.
Receiving 1KHz tone @ 3KHz deviation,
-60dbm.
Trace 1 -IDC...

11-4
Figure 19 . Waveform W6
Tek stopped:
T
1
Ch1T
18 Acquisitions
Tek stopped:
T
2
Ch2T
11
13
M  50ns  Ch1       2.2 V
W6: SPI Bus Programming ADSIC.
Trace 1 - ADSIC_SEL*
Trace 2 - SPI_SCK
Trace 3 - MOSI
Note: These waveforms are typical to
any device on the SPI bus.Ch1 Freq
= Hz
No period
found
Ch1
Ch35.00V
5.00V5.00V
MAEPF-24381-A
T
T T
Figure 20 . Waveform W7
103 Acquisitions
Tek stopped:
T
2
Ch2
1
3
4
M  200us  Ch1       2.20 V
W7: Receive audio: Receiving
1KHz tone @ 3KHz deviation, -60dBm.
Trace 1...

11-5
Figure 21 . Waveform W8
507 Acquisitions
Tek stopped:
T
1
Ch4 T
2
3
4
M  200us  Ch1       1.5 V
W8: Transmit Audio. 1KHz Tone
which provides 3KHz deviation.
Trace 1 - IRQB @ DSP (8KHz)
Trace 2 - MODIN
Trace 3 - EXT MIC @ node C484/R408
Trace 4 - MAI @ node R492/U401
MICAMPOUTCh1 Freq
7.9872kHz
Low signal
amplitude
5.00V
20.0mV
MAEPF-24383-A 500mV
500mV Ch1
Ch3Ch2
T
T
Figure 22 . Waveform W9
1 Acquisitions
Tek stopped:
T
1
Ch1T
2
M1.00ms  Ch1          4.52 V
W9: Power Down Reset.
Trace 1 - +5V @ U407...

11-6
Figure 23 . Waveform W10
493 Acquisitions
Tek stopped:
MAEPF-24385-OT
1
Ch1T
M   200ns    Ch1                   1.64 V
W10 ADSIC 2.4 MHz Reference
Trace 1 - IDC @ U406Ch1 Freq
2.4038MHz
2.00V 

12-1
Troubleshooting 
Diagrams
12
Introduction to 
This Section
This section contains troubleshooting diagrams necessary to isolate a problem to the component level. 
Use these diagrams in conjunction with the theory of operation, troubleshooting procedures, charts, and 
waveforms.
Table 3 . J201
VOCON Board to Universal Connector
J201 
Pin #Description To/FromUC 
Pin #
1Removed
2n/c
3n/c
4LH DATA/BOOT DATA OUT U208-1 3
5EXT MICU411-64
6SB9600 BUSY U204-J3 6
7OPT SEL 1U206-G3 
(EXT PTT)
Q2107
8RS232 DATA...

12-2
Table 4 . J601
VOCON Board to Display Board
J601 Pin # DescriptionTo /
From
1MOSIU204-J6
J801-8
J401-9
2SPI SCK U204-G5 
J801-9
J401-10
3SW B+J401-17
4 DISP EN*/
LATCH SEL*U206-G8
5DISP RST*U204-F5
6 BL EN U206-E7
7+5VU409-12
8 n/c
9+5VU709-9
Table 5 . J701
VOCON Board to Keypad
J701 Pin # Description To/From
1ROW 5/5V-EN*U206-F8
2 GROUND/MIC 
RETURN
3ROW 2/SPK ENU206-G4
4 INT MIC U411-2
5COL2U206-D5
6 COL3/MOB IRQ* U206-B4
7GROUND
8 n/c
9ROW4/TXPA EN*U206-G9
10 COL1 U206-A7
11ROW3/BUSY OUTU206-K8...

12-3
Table 7 . J801
VOCON Board to Encryption Board
J801 Pin # Description To/From
1SW B+J401-17
2 SW B+ J401-17
3EMC RXOU405-B7
4 EMC TXO U405-A7
5n/c
6 GROUND
7MISOU204-H6
8 MOSI U204-J6
J601-1
9SPI SCKU204-G5  
J601-2
10 EMC EN* U206-D6
11EMC REQ*U206-H3
12 EMC MAKEUP* U206-K7
13n/c
14 n/c
15KEYFAIL*/RTSIN*U206-J8
16 n/c
17n/c
18 n/c
19n/c
20 UNSW B+ J401-19
21GROUND
22 GROUND
23n/c
24 n/c
25n/c
Table 8 . J901
VOCON Board to Control Top Flex
J901 Pin # Description To/From
1UNSW B+J401-19
2 TG1/PROG...