Voltage Diagram - Icom IP501M Service Manual

SECTION 10
• FRONT-C UNIT
33C (3.3 V)
8C (8 V)
J1
33C LCDDT
1 2
LCDCL
3 4
LCDSB
5
6
8C RSLCD
7 8
LCDCS
9 10
DTM4
11 12
DTM3
13 14
DTM2
15 16
DTM1
17 18
19
20
DLC _ B
21 22
DLC _ R
PSW
23
24
FUNC TLC
25 26
SEL RLC
27 28
PROG BLC
29 30
FRONT-D UNIT
33C (3.3 V)
FUNC
PSW
PROG
SEL
[Address]
S1
SKRPACE010
[Call History]
S2
SKRPACE010

VOLTAGE DIAGRAM

33C (3.3 V)
LCDDT
LCDCL
LCDSB
RSLCD
R3
R4
LCDCS
8C (8 V)
RLC
TLC
LCD backlight
LDTC114YE
Q3
BLC
[Address] key light
DS2
B1931TX
[FUNC] key light
DS10
B1931TX
[CLR/Lock] key light
DS3
B1931TX
[Call History] key light
DS12
B1931TX
Explanatory notes
[FUNC]
S3
SKRPACE010
[CLR/Lock]
S4
SKRPACE010
10-1
0
0
R17
1k
R41
DS7
12k
B1931TX
R18
DS11
12k
B1931TX
R19
DS8
12k
B1931TX
R42
DS13
12k
B1931TX
Voltage Line
J2
C6
V0
20
1
C7
V4
19
1
C8
V3
18
1
C9
17 V2
1
C10
V1
16
1
C11
15 C2-
2.2
C2+
14
C12
C1+
13
2.2
C1-
12
LCD
C13
C3+
11
2.2
DS101
C4+
10
C14
882BH01042
VOUT
9
2.2
8 VSS
VDD
33C (3.3 V) 7
SL
6
SCL
5
A0
4
RES
3
CS1
2
1 VSS
8C (8 V)
Q10
LDTC114YE
[MSG]
DS9
G
R40
820
R16
R 3.3k
SML-522MU8WT86
Q4
LDTC114YE
Q5
LDTC114YE [TX/RX]
DS4
G
R13
820
R14
R 3.3k
SML-522MU8WT86
Q6
LDTC114YE
Q7
2SB1132G
8C (8 V)
R21
10k