Kenwood NXR-901 Service Manual page 197

5V
A-13
1.4V
C368
R357 C362
68p
Q310
220 0.01u
2SC4617(R)
0.9V
REFERENCE
SIGNAL AMP
C601
18p
5V
1.6V
L520
C615 R609
390n
C603
Q514
0.01u 0
68p
2SC4617(R)
1.2V
REFERENCE
SIGNAL AMP
COMPARATOR
C610
0.1u
C611
0.01u
C612
0.1u
Q517
DC SWITCH
A-26
2.1V
8V
C613
C598
D515
0.1u
Q513
HSM88AS-E
0.1u
2SC4617(R)
1.6V
D515
DETECTOR
Q513
REFERENCE
SIGNAL AMP
Q512,515
ON
DC SWITCH
Q512 Q515
SSM3K15TE(F) SSM3K15TE(F)
R595 R594
220k 0
20.0MHz DSP_20.0MHz
VOLTAGE REGULATOR
IC707
NJM78M05DL1AZB
5V
V-6
5C3
3 1
oUT IN
VCXO_DA_EN
8C1
IC506
TC75S59F-F
3 4
IN+ oUT
2
VSS
R604
1 5
IN- VDD
2.7k
R605 R606
5.6k 6.8k
Q517
SSM3K15TE(F)
COMPARATOR
3.3V
IC505
TC75S59F-F
R600
3 4
IN+ oUT
1k
2
VSS
1 5
IN- VDD
R603
15k
Q516
SSM3K15TE(F)
Q516
DC SWITCH
8C1
REF_SW2
Note : The components marked with a dot (•) are parts of layer 1.
8C1
oX_SCLK2
oX_SDo2
33MPU
oX_SCLK2
oX_SDo2
PLL_19_EN
REF_LDT
VCXO_DA_EN
R619
0
REF_EXIST
R613 EXT_EXIST
0
33MPU
VOLTAGE REGULATOR
IC809
KIA7808API
13.8V 1
IN
33MPU
OCXO_EXIST
oX_SCLK2
OCXO_EXIST
oX_SDo2
REF_SW2
10MHz
10MHz
10MHz
25
26
RFL_PWR
27
28
FWD_PWR
29
30
FAN_CURR
31
32
PA_CURR
33
34
35
LPF12
36
C813
27p
CN406
L802
20.0MHz
270n
C811
27p
CN405
L801
20.0MHz
270n
CN805
LPF13
1
2
3
4
5
6
7
R812
100k PLL_19_CE R835
8
0
9
R826 10
0
11
R827 12
0
13
R828 14
0
15
R829
16
0
17
R831
18
0
19
R832
20
0
21
R822
22
0
23
24
25
26
R823
27
100k
R816
28
0
R824 29
0
R817
30
0
R825 31
0
32
33
34
35
36
8V
8oCXo
3 1
oUT
2
1
2
OX_SDA 3
OX_SCL 4
5
6
7
OCXO_CURR 8
oX_SDI2 9
10
11
12
13
CN408
CN407
CN403
SURGE
PROTECTION
GND
RFL_PWR
GND
FWD_PWR
GND
FAN_CURR
GND
PA_CURR
GND
NC(FAN_CURR2)
GND
GND
RX UNIT
REF1
X55-312
-CN45
CONTROL UNIT2
REF2
X53-414
-CN302
Ctrl Digital
GND
GND
33MPU
oX_SCLK2
GND
oX_SDo2
GND
PLL_19_CE
GND
PLL_19_EN
GND
REF_LDT
GND
VCXo_DA_EN
GND
oCXo_EXiST
GND
oCXo_CURR
GND
oCXo_oN
GND
oCXo_VR_EN
GND
oX_SDi2
GND
REF_iN_oUT
iMP_H_L
REF_EXiST
oX_SDA
EXT_EXiST
oX_SCL
REF_SW
WP
REF_SW2
GND
GND
CN807
8oCXo
OPTION UNIT
(OCXO)
GND
KXK-3 M3 -CN3
CN803
33MPU
GND
oX_SDA
oX_SCL
oCXo_VR_EN
oCXo_oN
oX_SCLK2
oCXo_CURR
oX_SDi2
oCXo_EXiST
oX_SDo2
GND
REF_SW2
REF_IN (EXT IN)
OPTION UNIT
OCXO
(OCXO)
KXK-3 M3-CN2
REF_oUT