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SECTION 11

VOLTAGE DIAGRAM

11 - 1

• LOGIC UNIT

SEG31

SEG30

SEG29

SEG28

SEG27

SEG26

SEG25

SEG24

SEG23

SEG22

SEG21

SEG20

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

S21

S22

S23

S24

S25

S26

S27

S28

S29

S30

S31

S32

S33

S34

S35

S36

S37

S38

S39

S40

S41

S42

S43

S44

S45

S46

S47

S48

S49

S50

S51

S52

DS4 LD-BU4323J

COM0

COM1

COM2

COM3

CLONEOUT

CLONEIN

D1 MA2S111

Q1 UN9210

R2
15 k

VIN

REMOTE

C212 0.001

C213 0.001

C214 0.001

C215 0.001

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

J1 08-6210-030-800

AF
MOD

PLCK

UR3

LVCO
+3C

800
300

PLST

DICK
DIUD

VR3

REMOTE

PDA/UL

C211 0.001

C166
0.001

C167
0.001

SP1
CS028014-12

R221
330 k

R222
68 k

VCC

+3C

C209
0.001

R11
10 k

C21
0.1

C18
0.001

D3 MA2S111

R12
10 k

C22
0.001

Q4 XP1501 AB

C19
0.01

C168
0.001

Q5
2SB1132 R

C17
100

R224
1 M

R207
220 k

C20
22

C23
47

IC2 S-81335HG-KI

R190
4.7 k

VDD

VSS

IC3
S-80730SL-AT

C15
0.001

AFON

UR3

H/L

300

800

C157 0.1

Q42 UN9211

D19
MA2S111

+3CPU

+3C

P67/AN7

P66/AN6

P65/AN5

P64/AN4

P63/SCLK22/AN3

P62/SCLK/21AN2

P61/SOUT2/AN1

P60/SIN2/AN0

P57/ADT/DA2

P56/DA1

P55/CNTR1

P54/CNTR0

P53/RTP1

P52/RTP0

P51/PWM1

P50/PWM0

P47/SRDY1

P46/SLCK1

P45/TXD

P44/RXD

P43/ /TOUR

P42/INT2

P41/INT1

P40

P77

VL1

100

VL2

VL3

COM0

COM1

COM2

COM3

AVSS

VREF

VCC

SEG0

SEG1

SEG2

SEG3

SEG4

SEG5

SEG6

SEG7

SEG8

SEG9

SEG10

SEG11

SEG12

P76

P75

P74

P73

P72

P71

P70/INT0

RESET

XCIN

XCOUT

XIN

XOUT

VSS

P27

P26

P25

P24

P23

P22

P21

P20

P17

P16

P15/SEG39

P14/SEG38

IC1
M38267M8L-219GP [USA-3]
M38267M8L-155GP [Other]

C5
0.001

R210
10 k

C6
0.1

R230
100 k

CONT

C210
0.001

R197
47 k

R209
47 k

SEG12
SEG11

COM3

COM2

RESET

VR3

LVCO

MM/RM

BLED

KR0

KR3

SHIFT

HVCO
TXSEL

MICC

LIGHT

PTT

CFC

C156
27 P

X1
CR-534

R220
10 k

C155
24 P

ESIO

Q40
UN9213

VSS

SCK

HOLD

VCC

IC15 X25080SI-2.7

PCON

R205
100 k

R234
1 M

ESIO

C87
0.001

C203
0.001

R233
1 M

Q45
UN9115

R187
1 M

R186
470 k

C208
0.001

HVCO

DETO
NOISE

GND
GND

H/L

TXSEL

C200 0.001

C201 0.001

C202 0.001

C216 0.001

C217 0.001

R216
1 M

R211
470 k

R215
82 k

R214
82 k

R213
82 k

IC13 NJM2904M

R241
100 k

C181
0.01

C180
0.1

C172
0.1

R219
2.2 M

C173
0.0022

C169
0.0015

C170
0.1

C171
0.039

C179
100 P

R183
100

DS3
LT1EP53A

R240
120 k

R242
470 k

C178
0.1

R208
100

R184
100

DS2
LNJ310M6URA

DS1
LNJ310M6URA

R185
100

Q36
UN9215

Q44
UN9215

Q34
UN9215

Q35
UN9215

ECS

ECK

DIUD

DICK

POWER

CONT

KS0

KS2
KS3

KS1

KS4

CLONEIN

CLONEOUT

C204
0.001

R223
4.7 k

C205
0.001

C174 0.01

C175 0.1

CTCIN

VIN

CTCOUT

NOISE

LOCK

KS1

KS0

KS2

KS3

KS4

DTMF

PCON

PDA/UL

PLST

ECS

PLCK /ECK

R198
47 k

R301
10 k

R311
10 k

R321
10 k

R331
10 k

LOCK

KR3

POWER

S1
SSSS812-B-1

R200
470 k

R10
10 k

KR3

R231
220 k

R235
220 k

R236
220 k

R237
220 k

R238
220 k

Q10 2SJ364 Q

R38
1 M

R181
470 k

C154
0.047

R41
4.7 k

CTCIN

CTCOUT

PCON

DTMF

+3C

MM/RM

MICC

C36
0.047

C42
0.001

R218
100 k

C44
0.01

C45
0.01

C43
0.1

R48
390 k

R44
8.2 k

R43
39 k

R42
39 k

C40
0.001

C41
0.0022

R45 2.2 k

R46 15 k

Q12
XP6501 AB

R47
150 k

R152
56 k

C146
0.0022

EXTMIC

MOD

R162
100

R159
27 k

R153
56 k

C136
0.22

R146
470

1
2
3
4

6
5

IC12
BA4510F

R149
100

C142
0.001

R151
18 k

C145
0.0047

C143
120 P

MICC

Q30 UN9115

R154
180 k

R161 10

C207
0.001

C149
47

R148
6.8 k

C147
560 P

Q31 UN9211

MM/RM

MICC

R140
33 k

C130
470 P

C131
0.01

D4 MA8051 H

R196
100 k

R147
47 k

MC1
EM-123TH

C206
0.001

BAND1
BAND2

BAND3
BAND4

TXFH

RXF2

TXFL

D14

D11

KR0

KR1

KR2

KS0

KS1

KS2

C93
0.001

C92
0.001

C81
0.001

C80
0.001

TENKEY

H/L

D8
MA6S121

KR2

KR1

KR0

KSD4

KSD3

KR0

KR1

KR2

C91
0.001

VFO

TONE

MONI

KR3

R335
10 k

R325
10 k

R336
10 k

R307
10 k

R305
10 k

R304
10 k

R303
10 k

R302
10 k

R315
10 k

R316
10 k

R319
10 k

R309
10 k

D7 MA2S111

D6 MA2S111

KSD1

KSD0

CALL

S.MW

D15

D12

D16
MA2S111

KS3

KS4

C84
0.001

C83
0.001

C82
0.001

D17
MA2S111

R144
10 k

R142
1 k

R143
1 k

R141
1 k

C132
0.047

S2
JPM1990-2013R

C137
470 P

C138
0.001

R158
4.7 k

R156
4.7 k

C140
470 P

C141
4.7

C148
0.001

Q32
2SB1462 R

R155
47 k

R157
100 k

C139
0.0047

C133
4.7

R145
220 k

R160
150 k

SEG31

SEG30

SEG29

SEG28

SEG27

SEG26

SEG25

SEG24

SEG23

SEG22

SEG21

SEG20

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG17

P30/SEG18

P31/SEG19

P32/SEG20

P33/SEG21

P34/SEG22

P35/SEG23

P36/SEG24

P37/SEG25

P00/SEG26

P01/SEG27

P02/SEG28

P03/SEG29

P04/SEG30

P05/SEG31

P06/SEG32

P07/SEG33

P10/SEG34

P11/SEG35

P12/SEG36

P13/SEG37

SEG16

SEG15

SEG14

SEG13

TXC

KR1

KR2

SEG10

SEG9
SEG8

SEG7

SEG6

SEG5

SEG4
SEG3
SEG2

SEG1

SEG0

COM1

COM0

BAND

KSD2

OUT

2 3 4

EXTMIC
SPE
INTSP
AFON

TXC
SHIFT
VCC

C : 2.2

C : 13.2

C : 3.5

T: 3.5
R: 0

SGLO: 0
SGLC: 3.5

C : 3.5

T: 3.5
R: 0

0.2 ns

2.0 v

Содержание IC-T7H

Страница 1: ...SERVICE MANUAL DUAL BAND FM TRANSCEIVIER...

Страница 2: ...IC T7H 1F UNIT 5pieces 8810008750 Screw PH BO 2 x 15 ZK IC T7H Chassis 10pieces Addresses are provided on the inside back cover for your convenience 1 Make sure a problem is internal before disassemb...

Страница 3: ...CIRCUITS 4 4 4 5 OTHER CIRCUITS 4 4 4 6 PORT ALLOCATIONS 4 5 SECTION 5 ADJUSTMENT PROCEDURES 5 1 PLL AND TRANSMITTER ADJUSTMENT 5 1 5 2 RECEIVER ADJUSTMENT 5 3 SECTION 6 PARTS LIST SECTION 7 MECHANICA...

Страница 4: ...174 MHz 1 136 MHz 174 MHz 1 400 MHz 470 MHz 3 F3 F2 5 ppm 5 10 12 5 15 20 25 30 or 50 kHz BNC 50 4 5 to 16 V DC 1 6 A typical 1 6 A typical 0 6 A typical 0 7 A typical 180 mA typical 190 mA typical 16...

Страница 5: ...UHF band pass filter FI201 EFCH445MWN UHF RF amplifier Q201 2SC4226 Located under side of these points AF power amplifier IC151 2SC5226 VHF RF amplifier Q51 2SC5226 1st IF filter FI401 FL244 2nd IF f...

Страница 6: ...n below REMOVING 2F UNIT 1 Unscrew 1 screw E from the 2F unit 2 Unsolder the point F then remove the 2F unit with the contact base Disconnect J1 on reverse side of the 2F unit to remove Rear panel C F...

Страница 7: ...imit ter D201 and are then amplified at the the RF amplifier Q201 The amplified signals are passed through the band pass filter FI201 and are then applied to another RF ampli fier Q202 The amplified s...

Страница 8: ...etects the signal level from the number of the pulses and outputs an MM RM signal from IC1 pin 44 on LOGIC unit This signal controls the AF mute switch LOGIC unit Q10 to cut the AF signal line 4 2 TRA...

Страница 9: ...2 and Q204 are turned ON The signal passes through the low pass L7 L9 C9 C15 and high pass L1 L3 C1 C5 filters and is then applied to the antenna connector The high pass filter sup presses low harmoni...

Страница 10: ...ltage is supplied to the 3C R3 and T4 regulator circuits etc Common 3 V converted from the VCC line by the 3C regulator circuit LOGIC unit Q4 Q5 Q40 and D3 using the 3CPU regulator LOGIC unit IC2 3 V...

Страница 11: ...ow POWER switch is pushed Outputs LCD contrast control signals Input port for key matrix Input port for the PTT control circuit HIGH When transmitting Input port for reset circuit LOGIC unit IC3 pin 1...

Страница 12: ...as HPF OFF LPF 20 kHz De emphasis OFF Detector P P 2 Output power High Transmitting Displayed frequency 445 000 MHz USA 3 435 000 MHz Other Output power High Transmitting Displayed frequency 445 000...

Страница 13: ...QUENCY COUNTER 100 MHz 500 MHz 1F UNIT 2F UNIT RF POWER METER 10 W 50 FREQUENCY COUNTER 100 MHz 500 MHz R302 R304 VHF output power adjustment High UHF output power adjustment High ATTENUATOR 40 or 50...

Страница 14: ...dBm Modulation 1 kHz Deviation 3 5 kHz Pre set the R504 to maxmum CW Receiving Displayed frequency 443 000 MHz USA 3 433 000 MHz Other Connect an SSG to the antenna connector and set as Level 0 5 V 1...

Страница 15: ...R SSG 100 500 MHz 127 to 17 dBm 0 1 V to 32 mV CAUTION DO NOT transmit while the signal generator is connected L102 CP1 UHF sensitivity adjustment UHF sensitivity check point L53 L54 L55 VHF sensitivi...

Страница 16: ...F15NK L702 6200005830 S COIL NLH252018T 012J 12N L703 6200004380 S COIL LL1608 F18NK L723 6200008080 S COIL LQN21A R22J04 L724 6200008080 S COIL LQN21A R22J04 L725 6200008080 S COIL LQN21A R22J04 L801...

Страница 17: ...S CERAMIC C1005 JB 1E 102K T A C358 4030009810 S CERAMIC C1005 JB 1E 102K T A C359 4030009810 S CERAMIC C1005 JB 1E 102K T A C360 4030011600 S CERAMIC C1608 JB 1C 104KT N C361 4030009810 S CERAMIC C10...

Страница 18: ...009780 S CERAMIC C1005 CH 1E 270J T A C302 4030010080 S CERAMIC C1005 CH 1E 240J T A C303 4030011670 S CERAMIC C1005 CH 1E 2R5B T A C304 4030011670 S CERAMIC C1005 CH 1E 2R5B T A C305 4030009810 S CER...

Страница 19: ...17 7030005240 S RESISTOR ERJ2GEJ 473 X 47 k R118 7030005120 S RESISTOR ERJ2GEJ 102 X 1 k R119 7030004980 S RESISTOR ERJ2GEJ 101 X 100 R120 7030005220 S RESISTOR ERJ2GEJ 223 X 22 k R121 7030005240 S RE...

Страница 20: ...30009810 S CERAMIC C1005 JB 1E 102K T A C406 4030009810 S CERAMIC C1005 JB 1E 102K T A C407 4030009810 S CERAMIC C1005 JB 1E 102K T A C408 4030009760 S CERAMIC C1005 CH 1E 150J T A C409 4030009810 S C...

Страница 21: ...RJ3GEYJ 104 V 100 k R219 7030003840 S RESISTOR ERJ3GEYJ 225 V 2 2 M R220 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 k R221 7030005520 S RESISTOR RR0816R 334 D 330 k R222 7030005970 S RESISTOR RR0816R 683...

Страница 22: ...1005 JB 1E 102K T A C208 4030009810 S CERAMIC C1005 JB 1E 102K T A C209 4030009810 S CERAMIC C1005 JB 1E 102K T A C210 4030009810 S CERAMIC C1005 JB 1E 102K T A C211 4030009810 S CERAMIC C1005 JB 1E 1...

Страница 23: ...PARTS REF NO ODER NO DESCRIPTION QTY J901 6450000130 Connector HSJ1102 01 540 MIC 1 J902 6450001060 Connector HSJ1493 01 010 SP 1 J903 6450000870 Connector HEC2711 01 020 DC13 5V 1 S1 7600000190 Encod...

Страница 24: ...MP1 C MP8 C MP9 C MP21 C MP13 C MP13 C MP13 C MP12 C MP29 C MP1 1F MP2 1F J902 1F S1 1F J903 1F MP301 D J901 1F MP19 C MP24 C MC1 L W1 L J1 C J1 C LOGIC UNIT MP11 L SP1 L MP12 L MP13 L MP15 C MP401 P...

Страница 25: ...mbol R25 2SC4228 R45 Symbol R45 2SC4403 3 Symbol LY3 2SB1132 R Symbol BARB 2SB1201 S Symbol B1201 2SB1462 R Symbol BR 2SC3356 R25 Symbol R25 TRANSISTOR AND FET S S D G B E C B E C B1 E B2 C1 C2 E1 E2...

Страница 26: ...SECTION 9 BOARD LAYOUTS 9 1 DS1 DS4 MC1 DS3 DS2 C91 C92 C93 S1 C81 C80 C83 C82 9 1 LOGIC UNIT TOP VIEW...

Страница 27: ...C157 D19 C207 R207 Q4 C141 Q12 Q10 Q40 C208 R12 C19 C15 C169 C170 C180 Q45 C172 C178 R216 R240 R215 R213 R214 R242 R187 C179 C181 C154 R181 R186 C206 R241 R211 C171 D3 IC13 IC12 HD17 D13 D16 D7 D14 C1...

Страница 28: ...Q305 R306 MOD S B5216A C414 C415 C922 FI101 800 300 AF MOD EXTMIC SPE INTSP AFON PLST PLCK PDA UL REMOTE DICK DIUD AM UR3 VR3 LVCO 3C HVCO TXC SHIFT VCC H L TXSEL DETO NOISE SD GND GND 30 1 TO LOGIC U...

Страница 29: ...117 R116 R118 R119 R122 C121 C12 Q104 Q102 C124 C923 Q103 Q105 C106 D402 D401 C11 Q4 Q5 C123 C126 R5 C122 C413 C406 C406 C405 R408 R406 C402 C400 R612 R402 C416 C67 C65 R59 C63 C61 R101 R102 R110 R112...

Страница 30: ...C380 R374 C376 C377 C379 C378 L355 Q356 L353 C554 C553 R210 D552 D201 D51 D351 D52 VRF GND GND 800M GND URF C101 Q253 C910 C102 S1 J904 J904 L900 1 C861 R362 R363 R863 R862 J903 C865 UOUT GND VOUT GN...

Страница 31: ...C7 IC250 C371 C370 C904 C906 R365 C8 D1 C551 C15 C13 C14 C552 D551 C5 C4 C2 C3 C9 L2 L7 L8 L9 L724 L723 L551 L3 C10 C12 R728 R721 C724 C728 R726 R727 C911 C730 C727 R724 R262 R267 C214 R704 R708 R278...

Страница 32: ...3 IC151 TA7368F 2F UNIT TO BATT VCC Q10 2SJ364 Q12 XP6501 CTCIN R3 5 IC13 NJM2904M IC12 BA4510F VCC R3 REG 3C 3C VCC MIC AMP MUTE SW IC12 BA4510F Q31 UN9211 D901 RB060L 40 HV REVERS VOLT PROTECT MC1 E...

Страница 33: ...C201 0 001 C202 0 001 C216 0 001 C217 0 001 R216 1 M R211 470 k R215 82 k R214 82 k R213 82 k 1 5 6 7 8 IC13 NJM2904M R241 100 k C181 0 01 C180 0 1 C172 0 1 R219 2 2 M C173 0 0022 C169 0 0015 C170 0 1...

Страница 34: ...R250 0 15 D250 MA8030H C235 0 001 C2360 001 C234 0 001 R251 68 k R252 47 k 1 2 3 4 6 5 7 8 IC250 NJM2904M R265 4 7 k R261 1 M R264 2 2 k C254 0 001 R267 15 k R263 10 k Q255 2SB1462 R C231 0 001 C232...

Страница 35: ...1 MA2S077 C56 0 001 R51 68 k D52 MA304 Q51 2SC5226 4 C58 0 001 R52 100 k C59 0 001 R53 68 L53 LS 518 VRF C55 0 001 C54 10 P D55 1SV271 C69 9 P C57 12 P R57 33 k C60 0 001 R56 10 k R55 330 R54 100 Q52...

Страница 36: ...Australia Phone 03 9387 0666 Fax 03 9387 0022 Unit 9 Sea St Herne Bay Kent CT6 8LD U K Phone 01227 741741 Fax 01227 741742 URL http www icomuk co uk Zac de la Plaine Rue Brindejonc des Moulinais BP 58...

Страница 37: ...6 9 16 Kamihigashi Hirano ku Osaka 547 0002 Japan A 5551I S Printed in Japan 1998 by Icom Inc...

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