Remote Head Enhanced Main Board (Pcb: 8471016L01_A) - Motorola MTM800 User Manual

8.2 - 24
"BOARD-MARKER"
0 J301 - 12-pin Connector
SCI_TX J301-1
SPKR+ J301-2
SPKR- J301-3
GND J301-4
NC J301-5
5VD J301-6
HANDSET AUDIO J301-7
BUS+ J301-8
INTERNAL MIC J301-9
FLT_A+ J301-10
ON/OFF CONTROL J301-11
ANA GND J301-12
J301-13
J301-14
FLT_A+ 5V 5V 5V
TP302 TP303
R323 R324
F300
3.3K 4.7K
32V
2A
SPKR+
SPKR-
NC
BUS+
FLT_A+
ON/OFF CONTROL
ANA GND
1
TP301
9V3
C203 0.1uF
C301 C313
10uF 10uF
4 2 14
1
R325
U202-1
3 12.4K
11
G VAG_1
R326
12.4K
C302 470pF
NU
NU
C303 470pF
R322
6.2K
9V3 R301
47.5K
R321
12.4K
6 4
VAG_1
7
U202-2
5
G
VAG_1
11
FLT_A+
R101
12.4K
R1
5V
Q101
R102
R2
0
NU

Remote Head Enhanced Main Board (PCB: 8471016L01_A)

FLT_A+
R303 0
R304 0
VR301 VR302
33V 33V
R308 R309
0 0
R306 NU
NU
47.5K
VR303
20V
9V3
MMQA20VT1
4 13
U202-4
12
11
47.5K
R307
G R310 R312 R316
VAG_1
47.5K 47.5K 47.5K
R302 R311
R313
47.5K
47.5K 47.5K
9V3
9 4
R314
8
U202-3
10
G
392
11
R315
392
Gabel Hybrid
FLT_A+
9V3
R205
10 1
TP306
R201
80.6K
R203
U201
3.3K
LP2951CD
8 1
INPUT OUTPUT
7 5
FEEDBACK ERROR NC
3 2
SHUTDOWN SENSE NC
C204
6 R204
VTAP NC
3.3K
0.1uF
R202
12.4K
ENHANCED CONTROL HEADS: SCHEMATICS, PCBs and PARTS LISTS
J302 - 10-pin Telco
J302-8 SCI_TX
J302-2 SPKR+
J302-5 SPKR-
J302-6 GND
J302-1 AUDIO+
J302-3 BUS+
J302-4 AUDIO-
J302-9 FLT_A+_REG
J302-7 ON/OFF CONTROL
J302-10 ANA GND
6 4 3 1
R318
0
5 2
VR304
5V6
MMQA5V6T1
R317
47.5K
NU
Balanced Audio
G VAG_1