Puxing PX-777, Service Manual

Page: 26 / 30

7 8 9 10 11 12
O I
FL253
29.250MHZ
R433
1K8
L253
270nH
5V
C181
102P E181
4.7uF
T103
2SB624
R102
4K7
R101
4K7
C102
104P
T201
DTA114EE
C101
104P
C201
103P
R441
33K
C441
473P
R443
1M8
R442
33K
C444
104P
R444
10K
C446
470P
C445
473P
DTA114EE
C303
470P
C302
103P
C442
332P
C443
680P
5C
5R
5
R
5R
5T
5T 5T
5T
MIC
5V 5V 5V
5CC
P-TX/RX
P-TX/RX
R256
18K
R171
0.39R
R172
0.39R
R173
0.39R
R198
150K
R195
150K
R196
150K
R197
150K
R194
150K
R192
150K
R185
10K
R193
NC
R184
220K R183
47K
R186
NC
R182
1M
R181
10K
R187
39K
R188
47K
R189
18K
C195
471P
C198
NC
C173
103P
C192
101P
C191
102P
C185
470P
C186
103P
C188
104P
2
3
1
8
4
U161A
LM2904V
7
6
5
U161B
LM2904V
T191
DTC114EE
T181
DTC114EE
APC/TUNE APC/TUNE
B
A
T
T
5T
5
T
C447
820P
C172
105P
C171
103P
C451
103P
C448
332P
R449
10K
R447
1M8
R448
33K
R451
3K3
T451
2SC4617
R452
47K
T441
2SC4617
R446
33K
E451
2.2uF
R453
22K
C256
103P
L402
101T
R401
470R
C402
104P
R402
1K8
C403
470P
R403
100K
C404
273P
R404
18K
C407
102P
R406
750K
C406
223P
R421
820R C422
104P
E421
2.2uF
R405
22K
R431
30K
C405
102P
E431
4.7uF
R432
1K5
R434
51K
C431
223P
R435
4K7
2
3
1
8
4
U411A
LM4558
7
6
5
U411B
LM4558
3
3
1
1
2
2
D422
1SS372
T421
MRF497
C438
470P
R438
100R
R437
3K3
R436
1K8
5T
C408
102P
C401
103P
T431
2SK1824
C434
10P
C214
3P
C215
N.U.
C216
470P
C217
0.3P
VC220
6P
C221
3P5
C222
470P
C223
0.3P
VC226
6P
C227
4P5
C228
470P
C231
102P C232
102P
C233
470P
C234
8P
C237
10P
C238
0.5P
VC241
6P
C242
4P
C252
6P
C230
470P
R214
N.U. R217
100K R220
100K
R223
0R
R226
220K
R227
100K R228
220R
R229
0R
R230
3K3
R231
100R
L212
3T
L213
3T
L214
3T
L216
3T
L219
39nH
L220
18nH
L223
3T
L224
3T
L231
22nH
D215
N.U.
D214
HVC350B D217
HVC350B
D220
HVC350B
T231
3SK229
R213
100K
C205
102P
R212
0R
C212
15P
C272
33P
C254
103P
C264
104P
C284
104P
R262
470R
T261
2SC4215
R261
680K
R264
2.7K
R274
1K2
O
S
C
in
1
D
e
c
IF
o
u
t
IF
in
5
M
IX
in
1
6
R
S
S
I
1
2
M
IX
o
u
t
3
O
S
C
o
u
t
2
N
-d
e
t
1
3
N
-r
e
c
1
4
V
cc
4
G
N
D
1
5
C273
224P
C261
103P
C262
2P
C283
104P
C282
104P
R278
C243
470P
C246
0.5P
C247
4P
C250
103P
R234
100K
R237
0R
R238
1K
R239
220R
L227
3T
T251
3SK229
L252
0.56uH C251
15P
R251
2.2K
R242
1K
C206
103P
R252
1K
R254
470R
C253
15P
C263
13P
R417
1M
T411
2SC4738
3
3
1
1
2
2
D411
MA742
R416
0R
C417
104P C415
104P
R415
100R
C416
470P
R414
270R
C414
103P
R413
5K6
5T
O
S
C
o
u
t
1
T
X
in
6
N
.C
.
7
R
X
in
1
1
T
X
A
o
u
t
5
V
d
d
1
6
V
b
ia
s
9
R
X
A
o
u
t
1
2
N
.C
.
1
0
N
.C
.
3
O
S
C
in
2
V
ss
8
R
X
o
u
t
1
3
C
L
R
1
4
T
X
o
u
t
4
C
L
K
s
e
l
1
5
U512
FX/MX128
1
1
2
2
CR537
3.58MHz
R537
1M
C537
33P
C538
47P C541
150P
C535
104P
R535
100K
C539
120P
R539
100K
R540
100K
C540
104P
C533
470P
C534
470P
R527
22K
C527
150P
C532
470P
C542
104P
R541
47K
T525
UMC4
R530
10K
R531
10K
D530
1N4148
D531
1N4148
5
V
5
T
C501
103P
C531
103P
C257
5P
FL251
21.7MHz
FL252
21.7MHz
C281
102P
C255
5P
T102
DTA114EE
C103
470P
MIC MIC
C271
20P
C270
15P
CR272
21.250MHz
R301
1K
R202
1K
MIX IN
P-AMP
MIC
SB
AFin
APC/TUNE
D3
MONI
PB5
PTT
SP
N/W
VOX
P-AMP
MIC
SB
AFin
APC/TUNE
D3
MONI
PB5
PTT
SP
N/W
P-AMP
MIC
SB
AFin
APC/TUNE
D3
MONI
PB5
PTT
SP
S
B
A
P
C
/T
U
N
E
C279
104P
O I
FL261
450K
(T.Y.)
T401
DTA114EE
C409
470P
C410
103P
5VOX 5V
R408
1K
5
C
C
5CC
(T.Y.)
(T.Y.)
(T.Y.)
BEEP BEEP BEEP
B
E
E
P
E401
4.7uF
C413
103P
(T.Y.)
C412
103P
T402
DTA114EE
C411
470P
R409
1K
R669
1K
in
G
n
d out
U911
5A
C911
103P
E911
10uF
E913
10uF
C913
103P
C912
471P
5M
BATT BATT
BATT
5M
C202
470P
C301
103P