Service Manual

MM-E 2072-09333-00
DI
VCC
RO
DE
RE
GND
A
B
DI
VCC
RO
DE
RE
GND
A
B
DI
VCC
RO
DE
RE
GND
A
B
ACTIVE
ACTIVE
10 0
0
SHDN
OPSTATUS
AUTOSHDN
FORCEON
0X
0 1
EN_N
0
T_OUTF_OFF_N R_OUT
ACTIVE
VALID
X
YES
NO
HIGH_Z
HIGH_Z HIGH_Z
NORMAL (AUTOSHDN)
(PTP_TXD)
(PTP_RXD)
ACTIVE LOW
SH_DN_232_N
5V0_RS
5V0_RS
CH_TXD_P_INT
5V0_RS
5V0_RS
5V0_RS
E601
BLM18PG600SN1 BLM18PG600SN1
E501
TX_UART0_TTL
3V3_UART
48
1 3
2
5
6
7
U505
LTC485IS8
CH_TXD_P
C530
10U
25V
L506
4.7U
4.7U
L508
CH_RXD_P_INT
1K
R565
RXD
RX_UART1_TTL
TXD
1K
R561
PTT_MIC_P
CH_RXD_P
CH_RXD_M
R580
10
R564
1K
48
1 3
2
5
6
7
U506
LTC485IS8
R567
1K
10
R579
C558
100N
180P
C536C535
180P
180P
C533C534
180P
C531
180P
180P
C532
TRUNK_RX_UART0_TTL
7
6
5
2
3 1
84
LTC485IS8
U504
3V3
5V0
4.7U
L509
L507
4.7U
1K
R566
100N
C559
R578
10
100N
C557
4.7U
L505
L504
4.7U
PTT_M
PTT_P
CH_TXD_M
TRUNK_RX_UART0_TTL
CH_RXD_P
PTT_P
PTT_MIC_P
TX_UART0_TTL
CH_TXD_P
CH_TXD_M
PTT_M
CH_RXD_M
100N
C543
3V3
180P
C538 C537
180P
180P
C540C539
180P
180P
C542
C541
180P
TX_UART1_TTL
5V0
C602
100N
25V
10U
C601
5V0_RS
C2-
C2+
C1+
V+
C1-
T1I
V-
R1O
T1O
VCC
GND
FORCEON
FORCEOFF
INVALID
T2I
T2O
R1I
R2I
R2O
RDY
ACTIVE LOW
R570-573-OPTION FOR TRUNK/CDN/UART1-UART0 MODE
6
5
2
34
13
7
15
17
19
18
14
20
11
12 8
16
9 10
1
U507
MAX3224EEAP
SH_DN_232_N
3V3_UART
R57610
10R572
TX_UART0_TTL
TX_UART1_TTL
PTP_RXD
PTP_TXD
CH_TXD_P_INT
RX_UART1_TTL
TRUNK_RX_UART0_TTL
CH_RXD_P_INT
100NC548
C546 100N
C556
100N
C547 100N
100NC549
10 R570
R57110
10KR568
R573 10
1K
R562
10 R57510R577
R574 10
3V3_UART
10 R604
Figure A-3.F. CONTROL HEAD Module, Schematic Circuit Diagram (Sheet 6 of 6 – Interface Circuits, Trunk Mount Version Only)
A-61/A-62