Hytera MD78X Service Manual

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
600mV
330mV
MD780_U5_800&900MHz
9d3V
9d3V
9d3V
9d3V
9d3V
VAG
9d3V
VAG
VAG
VAG
VAG
VAG
VAG
VAG
3V3A
1V8D
3V3D
3V3A
1V8D
9V3
9d3V
9d3V
9d3V
9d3V
9d3V
9d3V
B+
9d3V
VAG
3V3A
SPK_SEL
EXT_SPKR+
EXT_SPKR-
TEMP_DET
TEMP_DET2
RXAF_DO
CODEC_/SS
CODEC_SSI_WCLK
LOW_LEVEL_MUTE
CODEC_SSI_DO
CODEC_MISO
PUB_ADDRESS2_EN
/CODEC_DAV
CODEC_SCLK
CODEC_CLK
PUB_ADDRESS1_EN
PUB_ADDRESS2
CODEC_SSI_DI
CODEC_PWT
CODEC_SSI_BCLK
CODEC_MOSI
MIC_GROUND
INT_MIC
PUB_ADDRESS1
EXT_MIC
EXT_MIC_EN
/CODEC_RST
AUDIO_PA_EN
SPKR1-
SPKR1+
HANDSET_AUDIO
RX_AUDIO
PUB_ADDRESS_MIC_EN
TXAF_DI
Model Name:
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Sunday, April 10, 2016 Audio
C282
1u
C282
1u
C265 220pC265 220p
C257 1uC257 1u
R285
15k
R285
15k
+
-
U235A
LM2902
+
-
U235A
LM2902
1
4 11
3
2
R275
100K
R275
100K
R255
470
R255
470
C292
4.7UF
C292
4.7UF
R262 100KR262 100K
C236
0.1u
C236
0.1u
C256
100P
C256
100P
R251
100
R251
100
C279 1uC279 1u
R2901K R2901K
C270
47pF
C270
47pF
Q232Q232
1
2
3 4
5
TP4029TP4029
C291
1u
C291
1u
R270
47K
R270
47K
R272 47KR272 47K
TP4012TP4012
C250 220pC250 220p
C271
47pF
C271
47pF
C238
1u
C238
1u
+
C520
10u/10v
+
C520
10u/10v
12
C260
0.01u
C260
0.01u
C290 1uC290 1u
R259 10KR259 10K
C237
0.47u
C237
0.47u
U237U237
B1
1
GND
2
B0
3
A
4
VCC
5
S
6
R254NC R254NC
R296
100K
R296
100K
+
C275
10uF/10V
+
C275
10uF/10V
12
C241 0ohmC241 0ohm
C200
1u
C200
1u
R284
15k
R284
15k
R266
47K
R266
47K
C277
1u
C277
1u
TP237TP237
1
C262
1u
C262
1u
RN230
100*4
RN230
100*4
1 2 3 45
6 7 8
R269
100K
R269
100K
R239 5.6KR239 5.6K
R289 0R289 0
R231 33R231 33
C278
1u
C278
1u
+
-
U236D
+
-
U236D
14
4 11
12
13
C289
0.1u
C289
0.1u
C274
0.1u
C274
0.1u
R238 3.3KR238 3.3K
C295
100P
C295
100P
C213
47pF
C213
47pF
TP234TP234
1
C280 220pC280 220p
C288
100p
C288
100p
R295 1KR295 1K
R264 1KR264 1K
C249 1uC249 1u
L235L235
+
-
U235D
LM2902
+
-
U235D
LM2902
14
4 11
12
13
+
C286
10u/25V
+
C286
10u/25V
12
R234
10K
R234
10K
D231D231
R236
10K
R236
10K
Q235
UMC4N
Q235
UMC4N
1
2
3 4
5
R250 15KR250 15K
TP235TP235
1
C246
0.022UF
C246
0.022UF
C267
0.1u
C267
0.1u
C240
0.1u
C240
0.1u
TP232TP232
1
R276
100K
R276
100K
C261
0.01u
C261
0.01u
R25810K R25810K
R271
100
R271
100
R263
30K
R263
30K
R241
56K
R241
56K
C204
47pF
C204
47pF
Q233
UMC4N
Q233
UMC4N
1 2 34
5
R252 100KR252 100K
R202
10K
R202
10K
R232
33
R232
33
C248
0.1u
C248
0.1u
R235
10K
R235
10K
C268 0.47uC268 0.47u
Q230
UMC4N
Q230
UMC4N
1
2
34
5
C255
1u
C255
1u
C251 1uC251 1u
C245 220pC245 220p
R283
30k
R283
30k
C252 1uC252 1u
C269
47pF
C269
47pF
C233
0.1u
C233
0.1u
D232D232
R261
10K
R261
10K
R292
33
R292
33
R265
1.8K
R265
1.8K
+
-
U236C
+
-
U236C
8
4 11
10
9
Q234
UMC4N
Q234
UMC4N
1
2
3 4
5
TP4016TP4016
R257
30K
R257
30K
D230 MMBZ20VALT1GD230 MMBZ20VALT1G
L233L233
U231U231
IOVDD
1
PWR_DN
2
RESET
3
GPIO2
4
GPIO1
5
AVDD2
6
AVSS2
7
AVDD1
8
NC9
9
NC10
10
NC11
11
NC12
12
AVSS1
13
VREF
14
VBAT
15
AUX2
16
AUX1
17
BUZZ_IN/CP_INN
18
CP_OUTP
19
CP_INP
20
MICIN_HND
21
MICBIAS_HND
22
MICIN_HED
23
MICBIAS_HED
24
MIC_DET
25
OUT32N
26
SPK1
27
SPK2
28
DRVDD
29
SPKFC
30
VGND/CP_OUTN
31
DRVSS1
32
OUT8N
33
BVDD
34
OUT8P
35
DRVSS2
36
DAV
37
SS
38
MOSI
39
MISO
40
SCLK
41
MCLK
42
SDOUT
43
SDIN
44
WCLK
45
BCLK
46
DVDD
47
DVSS
48
T-PAD
49
C259
1u
C259
1u
R273 24KR273 24K
+
-
U235C
LM2902
+
-
U235C
LM2902
8
4 11
10
9
+
-
U236B
+
-
U236B
7
4 11
5
6
C258 0.1uC258 0.1u
TP233TP233
1
C296
100p
C296
100p
R278
100
R278
100
R237 56KR237 56K +
C293
10uF/10V
+
C293
10uF/10V
12
C297
47pF
C297
47pF
C232
0.1u
C232
0.1u
-
+
+
-
B
A
A OUT
B OUT
A- A+
B+
B-
V+
V-
U238
-
+
+
-
B
A
A OUT
B OUT
A- A+
B+
B-
V+
V-
U238
1 2 3 4 5
6 7 8
C239
0.1u
C239
0.1u
R291 1.2KR291 1.2K
C243
0.1u
C243
0.1u
U201U201
OUT1+
1
OUT1-
2
VCC2
3
IN1
4
NC3
5
MUTE
6
ST-BY
7
PW-GND
8
S-GND
9
NC2
10
NC1
11
IN2
12
VCC1
13
OUT2-
14
OUT2+
15
C254 220pC254 220p
C263
1u
C263
1u
R267 1KR267 1K
R288 47KR288 47K
C287
0.47u
C287
0.47u
R287 5.6KR287 5.6K
L234L234
C283
0.1u
C283
0.1u
+
C519
10u/10v
+
C519
10u/10v
12
+
C284
47uF/25V
+
C284
47uF/25V
12
R277
47K
R277
47K
TP236TP236
1
R246 22KR246 22K
C242 220pC242 220p
R286 47KR286 47K
TP238TP238
1
C294
0.33uF
C294
0.33uF
C247 220pC247 220p
L232L232
R280NC R280NC
C281
1u
C281
1u
R279
30k
R279
30k
C235
0.01u
C235
0.01u
C253 1u/25VC253 1u/25V
TP239TP239
1
C285
0.1u
C285
0.1u
C272
47pF
C272
47pF
C264
1u
C264
1u
C266
1u
C266
1u
+
-
U236A
+
-
U236A
1
4 11
3
2
R247
100K
R247
100K
C298
1u
C298
1u
R248 100KR248 100K
+
-
U235B
LM2902
+
-
U235B
LM2902
7
4 11
5
6
R268
100K
R268
100K
R274 100KR274 100K
C206
0.1uF
C206
0.1uF
R242 0R242 0
C299
1u
C299
1u
C273
47pF
C273
47pF
Q231
UMC4N
Q231
UMC4N
1
2
3 4
5
R244 22KR244 22K
C276
1u
C276
1u
C234
10uF/25V
C234
10uF/25V
R260
100
R260
100
MD78X/MD78XG Schematic Diagram (Audio Circuit)
61

Hytera MD78X Specifications

General

Brand	Hytera
Model	MD78X
Category	Radio
Language	English