Kenwood KCH-16 Service Manual page 84

LCD (B38-0923-05)
CONTROL UNIT
(X53-4360-20) (A/4)
TH1
100k
-t
R1 R4 R10
12k 100k 10
IC2
C24
LMC7101BIM5
LCD
0.1u
CONTRAST
R20
0
VOLTAGE
DOUBLING
INVERTER
IC1
LM2682MMX
R6
47
CN8 R150
MAIN 22k
C12
R133 R13
0 0.1u 68k
MIC1 R8 R11
CN9 2.2k 12k
MIC AMP
IC3
NJM2904V-ZB
1 AoUT 8
V+
CONTROL UNIT
A-IN
(X53-4360-20) (D/4) BoUT
A+IN
B-IN
4 GND 5
B+IN
SUB CN107 E37-0674-15
CN5
2
1
MIC2
CN106 C22
0.1u
CN6
C117 CN7
470p
J2
1 KVL
L1
2 TRD
3 MIC
4 ME
5 PS
6 E
7 SB
8 RESET
R9
0
CURRENT
PROTECTION
POW
5V AVR
IC4
TA7805FQ
1 2 R16
IN oUT
GND
0
3
Q3
12A02CH
R14
0
R151
9V AVR LCD/12KEY
470k
BACKLIGHT SW
Q1
2SC2873(Y)F
R15 R30
2SC4617(S)
0 330
C27
470p
9V
Q4
SSM3K15TE(F)
D2
02CZ9.1(X,Y)F
LCD/12KEY
VOLTAGE BACKLIGHT SW
REFERENCE
CN1
R37
1k
Q5
UPA672T-A
LCD RESET SW
R41
47k
CS0
BUS SW
IC5
BUS SW
TC74LCX245FK
IC6
TC7WZ245FK-F
5 4
R136
B2 GND
0
6 3 WR
B1 A2
7 2 A0
G A1
8 1
VCC DIR
R49
0
R45 R50 R56
0 0 27k
R18 C25
27k 10u
R19
2.2k
R17 R21
HOOK
33k 2.7k R43 R40
100 0
CN10
Q8
DTC144EE
HOOK SW
CN11
R42 Q7
DTC144EE
100
HOOK SW
SURGE
ABSORPTION
L5
3.3V
3.3V AVR
L3 L4
IC8
XC6204B332M
1 5
VIN VOUT
2
VSS
3 4
CE NC
Q2,3
VOLTAGE
REFERENCE
Q2
CONTROL UNIT
(X53-4360-20) (B/4)
PTT
D6,7,9,10
LCD BACKLIGHT
LCD BACKLIGHT SW
Q6
UMG4N
R57
DM2
0
R58 DM1
0
R63
1k
Q9
2SK1824-A
DC SW
X1
L77-1956-05
R69 47k
R64 47k
LCONT LCONT
R65 47k HOOK HOOK
R66 47k KVL KVL
R68 47k
TRD TRD
SB SB
RESET RESET
D11-14
12KEY BACKLIGHT
CONTROL UNIT
(X53-4360-20) (C/4)
C74
0.01u
VR1
VOL
R31-0672-05
C73
0.01u
CN101 CN102 CN103 CN104 CN105
E37-0674-15 E37-1217-05
CN3 CN4
C88
0.1u
R78
0
CN12
CN13
CN14
CN15
CN16 CN17
KEYI2
KEYI1
100
KEYI0 1
KEYO3 2
KEYI0
KEYO2 3
KEYO3
KEYO1 4 KEYO2
KEYO0 5 KEYO1
KEYO0
6
BYTE
R61
7
CNVSS
8
470k
NC
9
SFT
10
RESET
R72 0 11
XOUT
12
CPU
VSS
13
IC9
XIN
3062LFGPUKCTA
14
VCC
15
NMI
R80 16
NC
47k 17
INT1
R76 0 18
INT0
R77 1k 19
PTT
20
LCONT
21
HOOK
R74 1k 22
KVL
23
NC
24
NC
25
NC
5V
Q10 Q11
DTC114TE
DTC114TE
TRD SW TRD SW
D17-20
12KEY CONTROL
R96 470
R97 470
R98 470
D20 R99 470
1SS388F
*
7 4 1
S3 S6 S9 R93
S12
470
0 8 5 2
S7 S13 R94
S4 S10
470
# 9 6 3
R95
S5 S8 S11 S14 470
S3-14
S70-0509-05
R100 R117
47k
R101
47k
R102 ZUP
47k
R103
47k
R104
47k
R105
47k
R118
R106 47k
ZDN
R107
47k
R108 47k
75
NC
74 PF1
PF1
73 PF2
PF2
72 PF3
PF3
71 PF4
PF4
70 D24-27
A0
Q13
69 PF KEY BACKLIGHT
A1
UMG4N
68
A2 Q13
67
A3 PF KEY BACKLIGHT SW
66
A4
65
A5
64
A6
63
A7
62
VSS
61
A8
R147
60
VCC
59
A9
58
A10
PF1
57
A11
56
A12
55
A13
54
A14
53
R148
A15
52 PF2
TXG
51
TX
D28-31
R149
PF KEY BACKLIGHT
Q12
UMG4N
Q12
D21 PF KEY BACKLIGHT SW
1SS301F
PF5
DC SW
KEYO0
D32
BUSY LED RED TX LED RED
KEYO1
D33
KEYO2 BUSY LED GREEN TX LED GREEN
KEYO3
BUSY LED SW TX LED SW
KEYI0
KEYI1
KEYI2
EUP
1k
EDN
1k
PF3
1k
PF3
PF4
1k
PF4
PF5
1k
CN2
NC 10
E 9
EPM 8
RXD 7
BUSY 6
TXD 5
SCLK 4
RESET 3
CNVSS 2
VCC 1
D34
D35