Motorola Gm328 Gm338 Gm398 Detailed 6804112j18 E Manual

Controller Board Audio and Signalling Circuits 1-19
2.5 Receive Signalling Circuits
Refer to 1-6 for reference for the following sections.
Figure 1-6 Receive Signalling Paths
2.5.1 Sub-audible (PL/DPL) and High Speed Data Decoder
The ASFIC CMP (U0221) is used to filter and limit all received data. The data enters the ASFIC 
CMP at input DISC (U0221-2). Inside U0221 the data is filtered according to data type (HS or LS), 
then it is limited to a 0-5V digital level. The MDC and trunking high speed data...

1-20 Controller Board Audio and Signalling Circuits
The output of the generator is summed into the audio chain just after the RX audio de-emphasis 
block. Inside U0221 the tone is amplified and filtered, then passed through the 8-bit digital volume 
attenuator, which is typically loaded with a special value for alert tone audio. The tone exits at 
U0221-41 and is routed to the audio PA like receive audio
2.6 Voice Storage (optional)
The Voice Storage (VS) option can be used to store audio signals coming...

2-1
Section 2
TROUBLESHOOTING CHARTS
1.0 Controller Troubleshooting Chart 
Power Up 
Alert Tone
 OK?
Speaker & 
Control-
head OK?
U0101
EXTAL= 
7.3728 MHz/ 
14.7456 
MHz? 
BUS+
activity when 
volume knob 
rotated?
MCU is OK
Not able to 
program 
RF Board ICsBefore replacing 
MCU, check SPI 
clock, SPI data, 
and RF IC select 
Replace 
Speaker / Con-
trolhead
U0221 Pin 34 = 
16.8 MHz?
Check 
FGU
Reprogram the 
correct data. & 
Check ASFIC 
and MCU
Check Control-
head and MCU 
(U0101, U0121, 
U0122,...

2-2Controller Troubleshooting Chart
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3-1
Section 3
CONTROLLER SCHEMATICS / PARTS LISTS
1.0 Allocation of Schematics and Circuit Boards
1.1 Controller Circuits
This Chapter shows the Schematics and the Parts Lists for the Controller circuits. 
1.2 Voice Storage Facility
The Voice Storage is fitted on all MPT radios GM338/GM398 as standard.
The schematics, component layout and parts list for these circuits are shown in this chapter. 
The Voice Storage schematic is shown in Tables below.
.
.Table 3-1   Controller T5 Diagrams and Parts Lists...

3-2Allocation of Schematics and Circuit Boards
Table 3-3   Controller T9 Diagrams and Parts Lists
Controller T9 used on PCB :
T9 on 8485670Z03 UHF B1, 1-25W
SCHEMATICS
Controller Overall
Supply Voltage
Audio
I/O 
Microprocessor
Voice Storage (if fitted)
Page 3-12
Page 3-13
Page 3-14
Page 3-16
Page 3-18
Page 3-19
Parts List
Controller T9 Page 3-23 

Controller T5 / Schematic Diagrams3-32.0 Controller T5 / Schematic Diagrams
T5 0102727B49
T5 0102727B50
T5 0102727B51  MPT
T5 0102727B52  SELV/MDC
T5 0102727B54 SEL5/MDC T5 0102727B53 MPTT5 0102727B55
T3 0102727B39T3 0102727B40  MPT P7 0102727B13
P7 0102727B14P7 0102727B17 MPT
P7 0102727B18 SEL5/MDCP6 0102727B07
P6 0102727B04  SELV/MDC P6 0102727B03  MPTP1 0102726B33
P1 0102726B32
P6 0102727B02P4 0102726B88
T2 0102727B25  SELV/MDCP4 0102726B87
P6 0102727B05 MPT
P6 0102727B06 SEL5/MDC
P6 0102727B01P5...

3-4Controller T5 / Schematic Diagrams
470pF
C0661
47uF C0601
R0642
7.5K
33uF C0641
470pFC0644
0.1uF C0681 J0601-2
C0612
0.1uF
R0641 J0601-1
10K
R0662C0662
.01uF
150K D0660R0652
1024K
Q0641
R0621
GND
3
INPUT 2
RESET_1
C0654U0653MC33464N-45ATR
10uF
U0651MC78M05GND2 IN 1
3
OUT
TP0661
C0663
0.1uFR0643
1.2K
0.1uF C0655 D0651
Q0661
R0611
56K
NU 5.6V VR0671
Q0681
68K R0682 18K R0681 E0631
57R0122uF C0611
10 R0651
33uF C0652 0.1uF
NU C0651
0.1uF C0645 24V VR0601
470pF C0621
C0622
47uF
NU
6 GND2
2
ON_OFFVIN 4...

Controller T5 / Schematic Diagrams3-5
CH_ACT
SQ_DET
LSIO
F1200 SYNCLK HSIO VOX
GP2_OUT
CSX
DATA
R0251
47K 24K R0222
C0222
0.1uF
C0226
0.1uF
R0269
470
9 NU R0220
8.2K
R0225
8.2K R0224
8.2K
NU
0 C0243
100pF
R024214 4
11
NU 0.1uF C0242MC3403 U0211-4
13
12
10uFC0202 R0203
100
0.1uF C0265
D02015
31
2 40.1uF
NUC0254
C0234
0.1uFC0272
0.1uF
3300pFC0273100K R0253 C0253
100pF
1uFNU
7C0252
M_SS 8NINV 1OUT14
OUT26 3
RR
VCC7
TDA1519C
GND1
2
5 GND2INV 9 C0225
0.1uF
U0271
0.1uF
NU C0274 C0232
0.1uF1MEGR0227100
NUR0229...

3-6Controller T5 / Schematic Diagrams
NC RST*7
8
14 INT_EXT_Vdd
NC
7
9 A0EXT_BD_REQ
EXT_BD_CS
GP4_IN_OUT
SPI_CLK
SPI_MOSI SPI_MISO
RESET
FLT_A+
DISCAUDIO
CH_ACT 26FLAT_TX_RTN6
CSX 2912-PIN CONNECTOR
13FAST_SQ
DISCAUDIO
PCB 23
21GPIO
DATA EXP1_CS
VS_AUDSEL
17GROUND SrD_Rtn5
DIG_IN_5 WITH WAKEUP (EMERGENCY)
13 37
DIG_IN_OUT_72 EXP_BD_PTT
DATA 36
8 EXP2_CS
BOOT_CNTRL Rx_Aud_Snd
ON
VS_INT
RX_ADAPT
VS_RAC 6
1 20SCI_TX
INT_MIC
DIG_IN_3 Tx_Aud_Snd8
NC10
11
Key_Row
Key_Intrp
DIG_IN_OUT_4 9V3 VS_MIC 5VD
GM300...