Kenwood LZ-702IR Service Manual page 25

P
QQ
3 7 63 1515 0
LZ-702W ONLY
R817 C826 C809
10K 0.1 470P
R818
10K
R819
5.1K
4.0V
Q812
ANALOG
MUTE
4.0V
Q812 Q811
4.0V
Lch
D915
MUTE
Rch
MUTE
Q810
LZ-702IR ONLY
SW5V
58
Q805
57
IR
AGC
SW
IC800
IR
TRANSMITTER
3.5V
Q818
IR 8V
ON/OFF
SW
3.5V
IR
ON/OFF
2.4V
SW
Q819
TE
L 13942296513
4
2
1
TP238
D216
ER
14V
0V
C227
16 0V 0.015
C234
CT
0.1
15
SW
14 0V
ND
13 28.6V
N3
12 18.7V
GH
11 -13.8V
N2
10 -11.8V
www
GL
C270
9 4.5V
EN
1
R219 R270
100K 1M
21
D214
P
.
74
K
Q
RIPPLE FILTER
Q807
SW8V
C810
OP AMP
2.2u50
+
Q808
IC801
1 8 8.1V
V+
C817
7 4.0V
0.47
2
3 6 4.0V
0V 4 5 4.0V
V-
C811 0.1
C827
47u16
+
Q806
IR
BAND
SW
0.7-1.5V
TP804
R807
100
0-3.3V
0V
Q809
0.7-1.5V
1.1V
R811
TP803
100
Q804
IR SURROUND
SW
IC302
REMOTE
BUFFER
IC901
1
0V NC
5.0V 0V
4 3
2
GND
A1
2 5.0V
3
A2
1 5.0V
5.0V 5 4
VCC GND
C914
0.1
IC500
5.0V 1
ABRT
0.9V 2
IL
R512 100K
1.8V 3
BOSC
R511 100K
R505 10K
3.0V 4
24 DBRT
R510 100K
R506 10K
3.0V 5
43 EN
C513 0.1 6.2V
6
DRV
8.5V 7
VBATT1
x ao
C512
y
0-9.0V 8
OUTL
1
0V 9
PGND1
R513 C508
10
BTL
i
4.3K 0.01
5.0-14.0V
R
8
0.5W SP AMP
IC802
TP801
2.4V 0V
1 8
VP OUT-
0.1V 2 7
IN+ NC
TP802
0V 3 6 0V
GND1 GND2
3.3V 4 5 0V
VC OUT+
MIX & INVERTER
AMP
IR : INFRARED RAY
BAND SW
IC803
C819
4.7u50
1 8 5.0V
VCC
+
C820 1.9V
7 2.6V
2
0.1
0V INH
6 1.9V
3
VEE
4 5 5.0V
GND A
C824 0.1
BAND SW
IC804
Q803
2.0V 1 8 5.0V
VCC
7 2.6V
2
0V INH
6 2.0V
3
VEE
Q803,809
4
5 5.0V
LED GND
A
DRIVER
C825 0.1
TP805
Q Q
3 6 7 1 3
E2PROM
E2PROM 5.0V IC303
8 5.0V 1
VCC
VCC A0
7 0V 2
WP
WP A1
6 3
SCL
SCL A2
5 4
SDA GND SDA
5V
0V
0V
C315 C326
0.1 0.1
4
2
1
INVERTER
CONTROLLER
20 0V
AGND
19 0V
ISFB
18 5.2V
VLFB
C504 0.47
C503
17 0V
FT
1
C502
16 2.1V
CCOMP
1500P
15 5.2V
REF
R503
C501
1K
L500
0.47
14 8.5V
C506
1
VBATT2
C500
2
1
u163
1 C547
13 0-9.0V 3
OUTR
1
12 0V
PGND2
4
C505
11
BTR 5
.
0.01
P502
S
2 9 9 4 2 8
CN801
1
to
SPEAKER
2
SW5V
IR
BAND
SW
Q800
IR-TX
FREQ
ADJ (R)
Lch
OUT
Q815
MUTE
D912
Q816
IR-TX
FREQ
ADJ (L)
Rch
OUT
MUTE
IR
ON/OFF
Q801
SW
1 5 0 5 8 2 9 9 4
8 5.0V
0V
7
TP326
R326
6
SCL
100
5
TP309
5V
0V TP325
R327
SDA
100
TP308
REMO
m
TP501
10
CN302
1 to
co
TP500
LCD
2
C509
6
0.1
INV GND1
X35-4640-62 (2/5)
T
LZ-702IR
9 9
7
9
8
81
82
83
84
85
86
7 87
88
CP322
100
TP30
VR
TP30
VG
TP30
VB
TP30
92
93
R30
94
100
9
10
2 8 9 9
RESET IC
IC300
3 2 3.3V
NC VDD
3.3V
4 1
VSS OUT
0V
C305 0.1
Q
Q301
R
Q300
4
2
1
9
10
9
10
TP
R40
10
TP400
3.3V 5V
IC108
5 5.0V Q
VCC
0V 1
4 0V
0V 2
12
0V
3
GND
C121
0.1
3.3V 5V
IC101
5.0V
5
1
VCC
0 or
3.3V 2 4 5.0V
6
0V 3
GND
C107
13
0.1
25