Blitz MJ-398U User manual

BLITZ MJ-398U
1
BLITZ
MJ-398U
FM TRANSCEIVERS
Instruction Manual

BLITZ MJ-398U
2
SPECIFICATIONS
GENERAL
Frequency Range 245.0000~245.9875
Working Temperate －10℃~＋55℃
Power Supply Requirement DC 7.2V
Operate Mode Simplex or Semi-duplex
Current Consumption ≤1.6A(transmit 4W)
SensitivityAdjust 2~20mV
Antenna impedance 50Ω
TRANSMITTER
Frequency Stability ±5ppm
Output Power ≤5W
Max Frequency Deviation ≤±5KHz
Audio Distortion ≤10%
Adjacent Channel Power ≤-65dB
Occupied Bandwidth ≤16KHz
RECEIVER
RF Sensitivity : ≤0.2μV
Audio Frequency Response 300~3000Hz
Audio Output ≥0.5w
Audio Distortion ≤10%
All stated specifications are subject to change without notice or obligation.

BLITZ MJ-398U
3
CIRCUIT DESCRIPTION
1. Frequency configuration
The receiver utilizes double conversion. The first IF is 38.85MHz and the second IF is
450kHz. The first local oscillator signal is supplied from the PLL circuit. The PLL circuit in
the transmitter generates the ecessary frequencies. Fig. 1 shows the frequencies.
2. Receiver
The freauency configuration of the receiver is shown in Fig.2.
1) Front - end RF amplifier
An incoming signal from the antenna is applied to an RF amplifier (T201) after passing
through a transmit/receive switch circuit (D101 ,D102,D103) and a 3-pole LC
filter(L203,L204).After the signal is amplified (T201), the signal is filtered by a band pass
filter (a 3-pole LC filter) (L217,L218,L221) to eliminate unwanted signals before it is
passed to the first mixer. The voltage of these diodes are controlled by to track the
MPU(U811) center frequency of the band pass filter. (See Fig. 2)

BLITZ MJ-398U
4
2) First Mixer
The signal from the RF amplifier is heterodyned with the first local oscillator signal from
the PLL frequency synthesizer circuit at the first mixer (T202) to create a 38.85MHz first
intermediate frequency (1st IF) signal. The first IF signal is then fed through crystal filters
(FL231,FL232) to further remove spurious signals.
3) IF amplifier
The first IF signal is amplified by T203, and then enters U200 (FM processing IC). The
signal is heterodyned again with a second local oscillator signal within U200 to create a
450kHz second IF signal. The second IF signal is then fed through a 450kHz ceramic filter
(FL240) to further eliminate unwanted signals before it is amplified and FM detected in
FL240.
4) AF amplifier
The recovered AF signal obtained from U200 goes to the microprocessor(U811). The
processed AF signal passes through an AF volume control and is amplified to a sufficient
level to drive a loud speaker by an AF power amplifier (U481).
5) Squelch
Part of the AF signal from the IC enters the FM IC again,and the noise component is
amplified and rectified by a filter and an amplifier to produce a DC voltage corresponding
to the noise level. The DC signal from the FM IC goes to the analog port of the
microprocessor (U811). U811 determines whether to output sounds from the speaker by
checking whether the input voltage is higher or lower than the preset value.To output
sounds from the speaker, U811 sends a high signal to the AF Power Iines and turns U481
on through T471,T472.
6) Receive signaling
QT/DQT
The output signal from FM IC (U200) enters the microprocessor(U811) .U811 determines
whether the QT or DQT matches the preset value, and controls the AF Power and the
speaker output sounds according to the squelch results
3. PLL frequency synthesizer
The PLL circuit generates the first local oscillator signal for reception and the RF signal for
transmission.
1) PLL
The frequency step of the PLL circuit is 5 and 6.25kHz and so on. A 16.8MHz reference
oscillator signal is divided at U301 by a fixed counter to produce the 5 or 6.25kHz
reference frequency. The voltage controlled oscillator (VCO) output signal is buffer
amplified by T373, then divided inU301 by a programmable counter . The divided signal is
compared in phase with the 5 or 6.25kHz reference signal in the phase comparator in
U301. The output signal from the phase comparator is filtrered through a low-pass filter
and passed to the VCO to control the oscillator frequency.
2) VCO
The operating frequency is generated by T331 in transmit mode and T357 in receive
mode. The oscillator frequency is controlled by applying the VCO control voltage, obtained
from the phase comparator, to the varactor diodes (D331 and D332 in transmit mode and
D350 and D351 in receive mode). The TC/RC pin is setlow in receive mode causing T192
off, and turn T291 on . The TC/RC pin is set hight in transmit mode causing T291 off,and
T192,T191 on.

BLITZ MJ-398U
5
3) UNLOCK DETECTOR
If a pulse signal appears at the LD pin of U301, an unlock condition occurs, and the DC
voltage obtained from D309, and C306 causes the voltage applied to the PLL-LD pin of
the microprocessor to go low. When the microprocessor detects this condition, the
transmitter is disabled, ignoring the push-totalk switch input signal. ( See Fig.3)
4. Transmitter
1)Microphone Amplifier
The signal from the microphone passes through U411.When encoding DTMF,it is turned
OFF for muting the microphone input signal by T414.The signal passes through the Audio
processor(U411) for the maximum deviation adjustment,and goes to the VCO modulation
input.
2)Drive and Final Amplifier
The signal from the T/R switch(D100) is amplified by the pre-drive(T101.T102) and drive
amplifier(T105) to 50mW.The output of the drive amplifier is amplified by the RF power
amplifier(T107) to 4.0W(1W when the power is low).the RF power amplifier consists of two
MOS FET stages.The output of the RF power amplifier consists of two MOS FET stages.
The output of the RF power amplifier is then passed through the harmonic filter (LPF) and
antenna switch (D101,D102)and applied to the antenna terminal.
5. Power supply
There are four 5V power supplies for the microprocessor: 5M,5C,5R,and 5T,5M for
microprocessor is always output while the power is on.5M for microprocessor is always
output while the power is on.5M is always output,but turns off when the power is turned off
to prevent malfunction of the microprocessor.
5C is a common 5V and is output when SAVE is not set to OFF.
5R is 5V for reception and output during reception.
5T is 5V for transmission and output during transmission.
6.Control Circuit
The control circuit consists of a microprocessor (U811) and its peripheral circuits.it
controls the TX-RX unit.U811 mainly performs the following:
(1) Switching between transmission and reception by the PTT signal input.
(2) Reading system,group,frequency,and program data from the memory circuit.
(3) Sending frequency program data to the PLL.
(4) Controlling squelch on/off by the DC voltage from the squelch circuit.
(5) Controlling the audio mute circuit by the decode data input.
(6) Transmitting tone and encode data.

BLITZ MJ-398U
6
1)Memory Circuit
Memory circuit consists of the CPU (U811) and an EEPROM(U821).An EEPROM has a
capacity of 32k bits that contains the transceiver control program for the CPU and data
such as Transceiver channels and operation features
2)Low Battery Warning
The battery voltage is checked using by the microprocessor.
(1) The red LED blinks when the battery voltage falls below 6.2V.
(2) A Warning tone generates when the red LED blinking.( See Fig.4)

BLITZ MJ-398U
7
ADJUSTMENT
Required Test Equipment
The following items are required to adjust radio parameters:
1. Regulated power supply
Supply voltage: 5-14V DC
Current: 3A or more
2. Digital multimeter
Voltage range: FS = Approx. 20V
Current: 10A or more
Input resistance: High impedance
3. Oscilloscope
Measurable frequency: Audio frequency
4. Audio dummy load
Impedance: 8 ohm
Dissipation: 1W or more
Jack: 3.5mm
5. SSG
Output frequency: 200MHz or more
Output level: -20dBu/0.1uV -120dBu/1V
Modulation: FM
6. Spectrum Analyzer
Measuring range: Up to 2GHz or more
7. Power meter
Measurable frequency: Up to 200MHz
Impedance: 50, unbalanced
Measuring range: 0.1W -10W
8. Audio volmeter
Measurable frequency: Up to 100kHz
Sensitivity: 1mV to 10V
9. Audio generator
Output frequency: 67Hz to 10kHz

BLITZ MJ-398U
8
Output impedance: 600, unbalanced
10.Distortion meter/SINAD meter
Measurable frequency: 1kHz
Input level: Up to 40dB
Distortion: 1% - 100%
11.Frequency counter
Measurable frequency: Up to 200MHz
Measurable stability: Approx. +/-0.1ppm
12.Linear detector
Measurable frequency: Up to 200MHz
Characteristics: Flat
CN: 60dB or more
Note
Standard modulation: 1kHz +/-2.5kHz/DEV
Reference sensitivity: 12dB SINAD
Specified audio output leve: 200mW at 8

BLITZ MJ-398U
9
Designator Component Designator Component
C100
C102
C104
C106
C107
C111
C112
C113
C114
C115
C118
C119
C123
C125
C128
C129
C131
C132
C133
C135
C136
C138
C142
C143
C144
C145
C147
C148
C149
C150
C151
C153
C154
C155
C164
C167
C168
C170
C173
C177
C180
C181
C191
C192
C193
C194
C195
C196
470P
470P
7P
470P
470P
8P
470P
102P
470P
104P
47P
102P
102P
470P
103P
470P
104P
470P
20P
7P
5P
100P
3P
470P
2P
470P
4P
1P
1P
5P
1.5P
3P
1P
1.5P
103P
470P
470P
100P
102P
102P
103P
104P
103P
470P
104P
470P
104P
470P
C200
C201
C202
C203
C204
C205
C206
C207
C208
C210
C211
C212
C213
C214
C216
C217
C218
C219
C220
C221
C223
C224
C225
C226
C227
C228
C229
C231
C232
C233
C234
C235
C236
C241
C242
C243
C244
C245
C246
C247
C248
C251
C252
C253
C254
C256
C257
C261
5P
8P
4P
2P
10P
4P
4P
470P
470P
470P
470P
470P
8P
470P
4P
10P
1P
3P
470P
3P
103P
6P
15P
103P
470P
4P
5P
104P
103P
8P
2P
103P
104P
100P
18P
104P
220P
220P
10P
470P
103P
103P
103P
104P
27P
104P
104P
104P

BLITZ MJ-398U
10
Designator Component Designator Component
C262
C281
C282
C284
C291
C292
C293
C294
C302
C305
C306
C307
C308
C309
C310
C311
C316
C317
C324
C326
C331
C332
C337
C338
C339
C340
C341
C342
C343
C344
C345
C350
C351
C355
C357
C358
C359
C360
C361
C362
C363
C371
C372
C373
C376
C377
C378
C391
104P
473P
104P
221P
103P
103P
470P
470P
104P
102P
104P
104P
101P
101P
101P
101P
5P
5P
102P
103P
100P
100P
10P
0.5P
5P
15P
5P
0.5P
102P
103P
470P
102P
100P
8P
39P
15P
5P
0.5P
103P
470P
470P
102P
6P
22P
102P
7P
102P
470P
C392
C400
C401
C412
C413
C417
C418
C419
C420
C421
C422
C423
C424
C435
C441
C442
C443
C444
C445
C446
C447
C448
C451
C471
C472
C473
C474
C475
C476
C481
C482
C483
C484
C485
C491
C492
C493
C494
C515
C521
C523
C546
C547
C548
C549
C811
C812
C817
103P
102P
100P
104P
470P
104P
273P
222P
223P
102P
223P
104P
100P
470P
473P
332P
680P
104P
473P
470P
820P
332P
103P
105P
103P
103P
104P
103P
104P
473P
100P
473P
221P
100P
104P
100P
104P
104P
223P
223P
223P
104P
103P
104P
104P
102P
102P
104P

BLITZ MJ-398U
11
Designator Component Designator Component
C818
C820
C821
C822
C824
C825
C826
C827
C831
C832
C833
C834
C835
C836
C837
C838
C839
C840
C841
C842
C843
C844
C845
C846
C847
C848
C849
C901
C902
C903
C908
C909
C910
CR240
CR255
CR340
CR825
D100
D101
D102
D103
D200
D201
D202
D203
D309
D331
104P
103P
104P
103P
104P
22P
22P
103P
102P
101P
101P
101P
101P
101P
101P
101P
101P
104P
103P
392P
104P
333P
103P
332P
105P
680P
103P
105P
102P
103P
103P
470P
103P
38.4MHz
C24
16.8MHz
32.768KHz
HSC277
HVU131
HSC277
HSC277
HSC277
HVC350B
HVC350B
HVC350B
PMSD4148
HVC350
D332
D337
D350
D351
D361
D416
D417
D493
D813
D814
D901
E126
E173
E232
E248
E281
E301
E302
E319
E320
E321
E324
E362
E380
E401
E417
E423
E452
E471
E482
E483
E514
E908
E910
FL231
FL232
FL240
JK402
JK481
JP400
JP811
L102
L103
L105
L107
L110
L111
HVC350
HVC350
HVC350
HVC350
MA2S11
DAN222
1SS372
1SS372
RED
GREEN
1SR154-400
1uF
6.8uF
10uF
10uF
10uF
4.7uF
4.7uF
0.1uF
1uF
0.1uF
22uF
10uF
4.7uF
4.7uF
2.2uF
4.7uF
223P
10uF
10uF
100uF
4.7uF
10uF
10uF
38.85MHz
38.85MHz
450K
3.5mm
2.5mm
JP3
JP16
18nH
101T
101T
15nH
4T
4T

BLITZ MJ-398U
12
Designator Component Designator Component
L112
L113
L114
L118
L119
L126
L128
L139
L201
L202
L203
L204
L213
L214
L217
L218
L221
L224
L225
L226
L323
L324
L325
L331
L332
L340
L350
L351
L355
L363
L371
L373
L412
L481
L821
L840
L900
L901
MIC401
PR301
PR811
PR812
PR813
PR814
R100
R101
R102
R103
4T
4T
1uH
1uH
2.2nH
101T
8T
220nH
3T
3T
3T
3T
39nH
18nH
3T
3T
3T
15nH
560nH
330nH
100nH
100nH
101T
6.8uH
6.8uH
6.8nH
6.8uH
6.8uH
8.2nH
101T
100nH
82nH
101T
101T
301T
101T
0Ω
100nH
MIC
1K
1K
47K
47K
1K
3K3
47K
680Ω
22Ω
R104
R105
R106
R107
R111
R113
R114
R115
R123
R125
R126
R128
R133
R139
R143
R147
R160
R161
R162
R165
R166
R167
R168
R169
R170
R171
R175
R176
R178
R179
R180
R181
R182
R191
R192
R200
R201
R203
R204
R205
R206
R210
R211
R212
R213
R214
R215
R220
1K5
680Ω
22Ω
680Ω
10Ω
47Ω
47K
120K
0Ω
47K
47K
47Ω
0Ω
270Ω
270Ω
0Ω
0.33Ω
0.33Ω
0.33Ω
150K(F)
150K(F)
150k(F)
150K(F)
150K(F)
150K(F)
10K
220K
47K
1M
10K
68K
47K
18K
47K
1K
0Ω
0Ω
100K
100K
0Ω
100K
100K
220Ω
220K
0Ω
3K3
100Ω
100K

BLITZ MJ-398U
13
Designator Component Designator Component
R221
R222
R223
R224
R225
R226
R227
R235
R236
R237
R243
R244
R245
R247
R249
R253
R255
R256
R281
R282
R283
R284
R291
R292
R300
R301
R304
R305
R306
R307
R308
R309
R317
R318
R319
R320
R321
R322
R324
R326
R339
R341
R344
R346
R349
R350
R357
R359
0Ω
1K
220Ω
1K
2K2
470Ω
47Ω
470Ω
2K7
680K
180K
3.3K
180K
3K3
10Ω
100K
1K5
1K
4K7
4K7
4K7
220K
1K
10K
2K2
22K
22K
22K
33K
150Ω
4K7
1K
0Ω
560Ω
560Ω
6K8
0Ω
2K2
22K
100K
10K
150Ω
100K
1K
15K
100K
10K
270Ω
R361
R370
R371
R372
R373
R374
R375
R376
R377
R391
R392
R400
R401
R402
R403
R404
R413
R414
R415
R416
R417
R418
R420
R421
R422
R423
R424
R433
R435
R441
R442
R443
R444
R446
R447
R448
R449
R450
R451
R452
R453
R471
R472
R476
R481
R482
R483
R484
4K7
680Ω
120K
5K6
3K3
100Ω
1K
220Ω
3K3
4K7
1K
100Ω
100Ω
4K7
100Ω
1K2
100K
0Ω
10K
820Ω
1K
18K
750K
22K
1K5
30K
51K
1K8
4K7
33K
33K
1M8
10K
33K
1M8
33K
10K
10Ω
3K3
5K1
22K
10K
2K2
10K
2K2
150Ω
0Ω
10Ω

BLITZ MJ-398U
14
Designator Component Designator Component
R485
R491
R492
R493
R494
R514
R515
R516
R517
R518
R519
R520
R522
R545
R546
R548
R549
R813
R814
R815
R817
R818
R820
R821
R822
R823
R824
R825
R826
R827
R830
R831
R832
R841
R842
R843
R845
R846
R847
R848
R850
R851
R901
R924
R925
RV307
RV453
1K
4K7
100K
0Ω
1M
1K
47K
22K
47K
10K
4K7
10K
56K
10K
330K
1K
4K7
560Ω
560Ω
4K7
4K7
4K7
0Ω
0Ω
15K
82K
100K
10K
10K
10K
150K
150K
47K
82K
68K
100K
1M8
33K
2K2
10K
1K
1K
0Ω
47K
10K
50K
100K
SP401
SW400
SW401
SW402
SW811
SW812
T101
T102
T105
T107
T161
T171
T191
T192
T201
T202
T203
T204
T291
T331
T343
T344
T357
T361
T372
T373
T391
T414
T441
T451
T471
T472
T813
T814
T815
T822
T845
U161
U200
U301
U411
U481
U511
U811
U821
U909
VR411
SP
CALL
MONI
PTT
RD840G
RD82-TD2
2SC4226
2SC3357
2SK3078
2SK3476
DTC114EE
DTC114EE
2SB624
DTA114EE
3SK299
3SK299
2SC4649
DTA114EE
DTA114EE
2SC4228(40)
2SJ243
UMC4
2SC4228(40)
2SC4617(S)
2SC3356
2SC3356
2SB624
MRF497
2SC4617
2SC4617
2SB624
DTC114EE
DTC114EE
DTC114EE
DTA114EE
2SB624
2SC4617
NJM2904V
TA31136F
LMX2332ATM
LM4558
TA7368
AUDIO
U-TMP87P805BU
24C32
5A
RD91

BLITZ MJ-398U
15
JN0304 JN0205
Designator Component Designator Component
C710
C711
C712
C713
C714
C715
C716
D717
D718
R710
R711
R712
R713
R714
T713
100P
100P
100P
100P
100P
100P
100P
PMSD4118
PMSD4118
510Ω
510Ω
510Ω
510Ω
510Ω
DTC114EE
C720
C724
C725
E720
L720
L721
R720
R721
R722
R723
R724
R725
T720
T721
104P
103P
103P
10uF
101T
101T
1K
6K8
330Ω
330Ω
560Ω
560Ω
DTC114EE
DTC114EE

1 2 3 4 5 6 7
A
B
C
D
E
7654321
E
D
C
B
A
LPFLPF
TX P ower AMP
2SC4226X2+2SK 3078+2SK3476/RD07
Antenna SW
HVU131
BPFBPF
RFAMP
3SK228
1st Mixer
3SK228
TX/RXSwitch
HSC277
APC
NJM2904V APC Sense
BATT5T
5R
5R
Buffer AMP
2SC3356
Modulat or
2SC4228(40)
RX VCO
2SC4228(40)
TX VCO/
Controler
TX/RXVCO 2SJ243 /UMC4
5C5C
LPF
Antenna
DO
Fin
BPF
38.85MHz
IF AMP
2SC4649
5R
2ndLO
38.4MHz
IF M ixer &
Demodulator
TA31136FN
5R
SQL
BPF
450KHz
DETOSC
450KHz
APC /TunePLL Cir cuit
LMX 2332
t
5C
C DCSS
TCXO
14.4M Hz
PLL-LD
PC4
PLL-CS
PC5
5T 5T
MIC PreAMP
1/2LM 4558
MIC AMP
1/2LM4558
MIC
JACK
3.5mm
Modulation
Addj uster
Speaker
JACK
2.5mm
AFAMP
TA7368
Power SW
DTA114EE
5M 5C 5R 5T
BATT 5M
VolumeC ontroler
PTTSW
SKRTLAE010
LPFLPF
5T 5T
AGC
1SS372+MRF497
DC Regulator
5A
+5M
DCS Balence
Circuit
PLLOSC
Addjuster
5C
TX Path
RX Path
1/2 5T
5M
DTC114EE
2SB624 X2
L208 L211L214 L204 L230
AF
RXD/PTT
TXD/RED
LPF
BATTERY
BATT Test
PLL-LD
PLL-Data
PLL-CS
PLL-CLK
MPU
TMP87P805U
PC5
PLL-CS
PC4
Save
TX/RX Control
RED/TXD
PTT/RXD
APC/Tune
BATTTest
VOX
SQL
CDCSS
CTCSS
AF POWER
DCS/CTCSS
Filter
OSC
32.768K Hz
Reset Circuit
2SB624
5M
M ON ISW
TD26EA
Channel
SCL
K4 K1
LAM P2
D3 D0
EEPROM
24C08 DATA
CLK
PLL-LDSW
SW
TX
LED RX LED
5V
BATT +5M
DTC114EE
DTC114EE
CALL SW
TD26EA
AUDIO SDA
5V
PC7 C TC SS
Save
TX/RX Control
RED
GREEN
MONI
CALL
ROM-DATA
PC6
GREEN
SDA
KeyBoard
LCD
PC0 PC3
PC4 PC7
LAM P1
LCD-CS
PB0
PB2
LCD-CS
Change EN0 EN3
RD840G
SW812 PA2
PA3RD810S
Buffer AMP
2SC4617
TXO
LPF
VOX AMP SW
1SS372 VOX
5M
POWER SW
2SB642
AFPOWER
AF
RED/TXD
PLL-LD R416
2K2 MIC TUME
PDF created with pdfFactory trial version www.pdffactory.com

AB
1
2
3
4
5
CDEFGHIJKLM
1
2
3
4
5
ABCDEFGHIJKLM
ANT111
ANT
L111
4T
L112
4T
L113
4T
L118
1uH
C145
470P C153
3P C155 1.5P
C154
1P
C150
5P
C147
4P
C151
1.5P
C149
1P
C138
100P
C142
3P
D101
HVU131
C123
102P
C133
20P
C119
102P
C118
47P C136
5P C148 1P
C135
7P
R123
0R
T105
2SK3078 T107 2SK3476
L105
101T
C114
470P
C113
102P
C112
470P
C125
470P
C115
104P
C129
470P
C373
22P
C132
470P
C128
103P C131 104P
L126
101T
C102
470P
C100
470P
C111
8P
C104
7P T102
2SC3357T101
2SC4226
D100
HSC277
C377
7P
C372
6P
C376
102P
C344
103P
C343
102P
R128
47R
Strip line
R125
47K
R126
47K
R114
47K
R115
120K
R113
47R
R111
10R
R107
680R
L103
101T
C107
470P
C106
470P
R106
22R
R105
680R
R104
1K5
R102
680R
R101
47k
R377
3K3
R376
220R
R373
3K3
R345
100P R371
120k
R143
270R R139 270R
C143
470P
R103
22R
R100
3K3
R370
680R
L110
4T
C144
2P D102 HSC277 D103 HSC277
R147
0R
R201
0R
C201
8P
C204
10P
C207
470P
C206
4P L202
3T
C208
470P
D201
HVC350B
L204
3T
L201
3T
R206
100K
C203
2P
C202
4P
C205
4P
D202
HVC350B
R205
0R
L203
3T
R204
100K
T201
3SK299
C210
470P
C213
8P
C214
470P C212 470P
R213
0R
R212
220K
R215
100R
R210
100K
R214
3K3
C211
470P
R211
220R
L217
3T
L218
3T
C216
4P
C217
12P
C219
3PC218
1P
D203
HVC350B
R220
100k C220
470P
C221
3P
C223
103P L221
3T
R224
1K
R223
220R
R221
0R
R226
470R
R222
1K
T202
3SK299
R225
2K2
C225
15P
C226
103P
C231
104P C227 470P
C235
103P
C232
103P
R235
470R
R237
680K
R281
4K7
R227
47R
R236
2K7
T203
2SC4649
OSC in 1
De c 6
FILo u t 7
IFou t11
IFin 5
MIXi n
16
AF o ut
9
RS SI
12
QUA D
10
MIXou t 3
OSC o u t 2
FILi n 8
N-de t13 N-re c
14 V c c 4
GND15
U200
TA31136F
C233
8P
FL231
38.85MHz
FL232
38.85MHz
C234
2P
C236
104P
C251
103P
C244
220P
C243
104P
R243
180K
R244
3.3K
R245
180K
R247
3K3
C245
220P
C246
10P
C247
470P
C248
103P
C281
473P
C252
103P
C256
104P
CR255
C24
C254
27P
R255
1K5
R249
10R
R253
100K
C253
104P
T204
DTA114EE
76
5
U161B
NJM2904V 2 3
1
84 U161A
NJM2904V
R167
150k(F)
R165
150K(F)
R166
150K(F)
R168
150K(F)
R133
0R
R171
10K
C168
470P C167
470P
C165
N.U
C170
100P
R160
0.33R
R161
0.33R
R162
0.33RR169
150K(F)
R176
47K
R170
150K(F)
R172
N.U
R175
220K
R178
1M
T171
DTC114EE
T161
DTC114EE
R179
10K
R182
18K R181 47K R177 N.U
R180
68K C177
102P
C181
104P C180 103P
C173
102P E173
6.8uF C164
103P
T372
2SC3356
L372
NC
T373
2SC3356
C345
470P
C341
5P
C332
100P C340
15P C342
0.5P
C378
102P
C371
102P
C338
0.5P
C350
102P
C360
0.5P
C339
5P
C331
100P
L371
100nH L373 82nH
L350
6.8uH
L340
6.8nH
R375
1K
R372
5K6
R374
100R
R339
10K
T344
UMC4
R344
100K
T361
2SC4617(S)
T343
2SJ243
T331
2SC4228(40)
T357
2SC4228(40)
R341
150R
R357
10K
C359
5P
C358
15P
C357
39P
R359
270R
D337
HVC350
D331
HVC350 L332
6.8uH
L331
6.8uH
D332
HVC350
C351
100P
L355
8.2nH
D351
HVC350 L351
6.8uH
D350
HVC350
L325
101T
R326
100K
R349
15K
R322
2K2
R319
560R
R321
0R
R318
560R
R320
6k8
R309
1K
R308
4K7
C308
101P
C302
104P C307
104P
C306
104P
C326
103P
C310
101P
C305
102P
C309
101P E321 0.1uF
E320
1uF
E319
0.1uF
E324
22uF
Vcc 1 1 Vp 1 2
Do RF 3 GND _ D 4 f in RF 5 f in RF 6 GND _ A 7 OSC in 8 GND _ D 9 Fo L D 1 0
Cl oc k
11
Da ta
12
LE
13
GND _ A14 f inI F
15
f in I F1 6 GND _ D
17
Do I F18 Vp 2
19
Vc c 22 0
U301
LMX2332ATM
C324
102P
C311
101P
XOUT 3
VC
15C4
GND 2
CR340
16.8MHZ
D309
PMSD4148
R307
150R
R306
33K
R305
22K
R304
22K
E302
4.7uF
E301
4.7uF
R300
2K2
R301
22K
PR301
1K
L324
100nH L363
101T
C363
470P
E362
10uF
C362
470P
D361
MA2S11
R361
4K7
C361
103P R346
1K
C257
104P
nc1 Vcc
2nc
3Vin4 Ripple5 NF 6
Phase 7
PreG 8PwG 9
Pout 10
U481
TA7368
2
5
4
1JK481
2.5mm
R482
150R
R483
0R R484
10R
R472
2K2
R471
10K
C484
221P
C483
473P
C482
100P
C474
104P
C475
103P E471 10uF
E483
100uF
E482
10uF
T471
2SB624
T472
DTC114EE
R481
2K2
C481
473P
C473
103P
C476
104P
R476
10K
L481
101T
R485
1K
BAT111
BATTERY
C901
105P
C485
100P
C401
100P
C902
102P
C903
103P
L901
100nH
R403
100R
R413
100K
R423
30K
R901
0R
D901
1SR154-400
R400
100R
5C
R421
22K
R417
1K
R418
18K
R422
1K5 R420
750K
C412
104P
C413
470P
C424
100P
C418
273P
C417
104P T414 MRF497
2
3
1
84
U411A
LM455876
5
U411B
LM4558
C419
222P
C420
223P
C421
102P
C423
104P
C422
223P
R424
51K
R324
22K
D417
1SS372
R433
1K8
R441
33K
C441
473P
R443
1M8
R442
33K
C444
104P
R444
10K
C446
470P
C445
473P
C442
332P
C443
680P
C447
820P
C451
103P
C448
332PR449
10K
R447
1M8
R448
33KR451
3K3
T451
2SC4617
R452
5K1
T441
2SC4617
R446
33K
R453
22K
R435
4K7
23 24 25 26 27 28 29 30 31 32 33
34
35
36
37
38
39
40
41
42
43
44
1 2 3 4 5 6 7 8 9 10 11
12
13
14
15
16
17
18
19
20
22
21
U811
U-TMP87P805BU
CR825
32.768KHz
C821
104P
L821
301T
C826
22P
C825
22P
T822
2SB624
C822
103P
3 2 1
SW811A
RD840G
6 5 4 9 8 7
12 11 10
VOUT4 VDD 5
GND
3SDA
1RST 7
GND 6OSC
2 SCL 8
U511
AUDIO
A01 A12
GND
4DA 5CK 6 A2
3WP 7
Vcc 8
U821
24C32
PR811
1K
PR812
47K
C811
102P C812 102P
C827
103P
R827
10K
R548
1K
C548
104P
C549
104P
R549
4K7
C547
103P
C546
104P
R546
330K
R545
10K
C831
102P
R832
47K
R830
150K R831
150K
5M
5M
T845
2SC4617
R846
33K
R848
10K
R845
1M8
R847
2K2
C846
332P
C845
103P
C849
103P
C847
105P
C848
680P
R843
100K
C843
104P
C842
392P
C844
333P R842 68K
R841
82K C841
103P
D493
1SS372
R493
0R
C493
104P
C491
104P
C284
221P
C492
100P
R492
100k
R491
4K7
R284
220K
BATT+
in
Gnd
out
U909
5A
E910
10uF
C910
103P
C909
470p
E908
10uF
C908
103P
VR411A
RD91
R450
10R
T191
2SB624
R191
47K
R192
1K
C191
103P
C192
470P
C291
103P
C193
104P
C293
470P R291 1K
C292
103P
C294
470P
R292
10K
E417
2.2uF
C435
470P
P-TXP-TX
BATT
BATT
C471
105P C472
103P
P-TX
R203
100K
APC/TUNE
APC/TUNE
L225
560nH
L226
330nH
5R 5R
R200
0R
D200
HSC277
C224
6P
C200
5P
L224
15nH
C391
470P R392 1K
C392
103P
C316
5P
C317
5P
R317
0R
RV453
100K
L412
101T
R414
0R
E423
4.7uF
5R
5T
5T
5T
E514
4.7uF
L840
101T
C840
104P
R518
10K
R517
47K R519
4K7
R521
NCR520
10K
R523
NC
R522
56K
C521
223P
C523
223P
3
2
5
4
1JK402
3.5mm
BATT
MIC
5C
AF
AF POWER
PTT/RXD
BATT
AFin
R282
4K7
C282
104P
E281
10uF
R283
4K7
SC
T391
2SB624
R391
4K7
BAT TT EST
BATTTEST
V OX A NSQ L
ANSQL
APC/TUNE
APC /T UNE
R404
1K2
R925
10k R924 47k R516
22K
R515
47K
C515
223P
R514
1K
BATT
BA TTBA TT
BA TT
MIC
APC /TU NE
AF
A FP OW E R
M ON I
PTT/RX D
5M+
5M
5C
5M
5M
5C
5T
5T
5R
5R
5R
5R
5C
5C 5C5C
DQTo
RX
BEE P/QT
JN0104
SCHEMATIC DIAGRAM
JN0104 Revision E04B
Drawing By Y.J.F Netec 0625
AF P OW ER
RED/T XD PTT/R XD
R256
1K
C241
100P
C242
18P
CR240
38.4MHZ
5T
5T
5T
5T
C195
104P C196 470P
L102
18nH L107 15nH
L119
2.2nH
L114
1uH
C134
NC
L139
220nH
MIC
MONI
D0
D1
D2
D3
5M
LAMP 2
D0
D1
D2
D3
K1
K2
K3
K4
LCD CS
LAMP 1
PR813
47K R834
NU
5M
PR814
1K
PC5 PC6 PC7 PC0 PC4 PC3 PC2 PC1 PB 0
HT 1621-CS
EN1
EN2
T291
DTA114EE
T192
DTA114EE
C194
470P
C836
101P C837 101P C838 101P C839 101P
C835
101P
C832
101P C833 101P C834 101P
RX
BATT
BEEP/QT
AF
BATT
MIC
APC/TUNE
AF
AF POWER
MONI
PTT/RXD
BATT
MIC
APC/TUNE
AF
AF POWER
MONI
PTT/RXD
BATT
MIC
APC/TUNE
AF
AF POWER
MONI
PTT/RXD
AF POWER
A Fin
M IC -V OX
MIC
RX
5M+
5M
5M
5M+
5M 5M 5M TC/RC
SC
TC/RCTC/RC
5M+
5M
P D3
PD3
PLL-LD
R OM-D ATA
5T
cv
HT1621-CS
D813
RED
D814
GREEN
T813
DTC114EE T814 DTC114EE
R814
560R
R815
4K7
R813
560R
C817
104P
T815
DTA114EE
R817
4K7
R816
NC
C818
104P
R818
4K7
GREEN
RED/TXD
PC4
PC6
DQTo
PC7
CA LL
CALLCALLCALL
CALL
PC5
PC6
PC7
PC0
PC4
PC3
PC2
PC1
PB0
HT1621-CS
PD3
PC0
PC3
PC2
PC1
PB0
EN1
EN2
PC5
PLL-CS
ROM-DATA
M O NI
CALL
E232
10uFE248
10uF
5M
R850
1K
R851
1K
S DA
SDA
SDA
5M
5T
R401
100R
R402
4K7
E401
4.7uF
RED/TXDRED/TXD RED/TXD
R ED/TX D
RED/TXD
3 2 1
SW812A
RD82-TD2
L214
18nH
L213
39nH
L128
8T
R822
R15K
R820
0RR821
0R
R823
82K
R824
100K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
JP811
JP16 D416
DAN222
MICMUTEMICMUTEMICMUTE
MICMUTE
MICMUTE
R415
10K
R416
820R
O I
FL240
450K
C261
104P
C262
104P
E126
1uF
E452
223P
E380
4.7uF
RV307
50K
L900
0R
Modifyed By S.Y. Netec 0651
R350
100K
R826
10K
R825
10K
C399
N.C
C398
N.C
C337
9P
C355
8P
C230
NC C229
5P C228 4P
C127
N.C
C116
N.C
R494
1M
C824
104P
C820
103P
L323
100NH
SW401
MONI
SW402
PTT
SW400
CALL
C400
102P
1
2
3
JP400
JP3
SP401
SP
MIC401
MIC
C494
104P