Icom Ic-910h Vhf/Uhf All Mode Tranciever Service Manual

							7 - 2FUNC BOARD
JACK BOARD
VR-A BOARD
MIC BOARD
VR-B BOARD
RIT BOARD
DISPLAY UNIT
MP25 (C)
MP21 (C)
MP25 (C)
MP21 (C)
MP25 (C) MP21 (C)
MP25 (C)
MP25 (C)
MP25 (C)
MP25 (C)
MP37 (CH)J1 (J)
J1 (MIC)MP4 (D)
MP4 (D) MP37 (CH)
EP2 (F) MP33 (C)
R1 (VA)
J1 (MIC) MP35 (F)
R1 (VB)
MP33 (C)
MP2 (C)
MP38 (F)
MP33 (F)
MP15 (F)
MP4 (F)
MP19 (F)
MP22 (F)
MP9 (F)
MP23 (F) MP20 (F)
MP2 (F)
MP17 (F)
MP5 (C) SP1 (C)
MP35 (F)
MP6 (F)
MP5 (F)
MP14 (F)EP1 (F)
R1 (R)
MP34 (C)
MP13 (F)
MP31 (F)
MP25 (F) MP36 (F)
MP1 (F)
R1 (VA)
MP32 (F)
EP1 (F)
MP32 (F)
MP10 (C)
MP35 (C)
MP9 (C)MP24 (C)
MP25 (C)
MP3 (D)
EP31 (D)
DS31 (D)
MP2 (D)
MP1 (D) EP31 (D)MP34 (F)MP34 (F)
MP34 (F)
MP34 (F)
MP34 (F)
MP34 (F)
MP802 (D)MP34 (F)
R1 (R)
MP7 (F)
MP37 (CH)
MP37 (CH)
MP1 (C)
MP24 (C)MP9 (C)
MP10 (C)
MP25 (C)
MP6 (C)
MP22 (C)
MP7 (C)
MP23 (C)
MP25 (C)
MP8 (C)
MP25 (C)
MP25 (C)
MP21 (C)
MP25 (C)
MP25 (C)
Unit abbreviations : (C) : COVER PARTS (F) : FRONT UNIT (D) : DISPLAY UNIT 
(CH) : CHASSIS PARTS (J) : JACK BOARD (VA) : VR-A BOARD 
(VB) : VR-B BOARD (MIC) : MIC BOARD (R) : RIT BOARD
R1 (VB) 
						

							7 - 3
MAIN UNIT
PLL UNIT
DRV BOARD
VARISTOR-C 
BOARD
VARISTOR-B
BOARD
PA UNIT VARISTOR-A 
BOARD
MP12 (CH)
MP1851 (M)
MP32 (CH)
MP56 (CH)
MP59 (CH)
MP56 (CH) MP56 (CH)
MP57 (CH)
MP34 (CH)
MP34 (CH)MP56 (CH)
MP51 (CH)
MP34 (CH)
MP34 (CH)
MP56 (CH)
MP32 (CH)
MP32 (CH)
MP5 (CH)
J1 (CH)
MP32 (CH)
MP32 (CH)
MP17 (CH)MP1 (M)
MP32 (CH)
MP13 (CH)
MP3 (CH)MP1 (CH)
MP11 (CH)MP12 (CH)
MP542 (M)MP543 (M) MP251 (M)
MP91 (M)
MP8 (CH)
MP8 (CH)
MP8 (CH)
MP8 (CH)
MP184 (M) MP243 (M) MP661 (M)
MP702 (M)MP182 (M)
MP23 (M)
MP281 (M)
MP18 (CH)
MP15 (CH)
MP71 (M)
MP8 (CH)
MP31 (M) MP21 (M)
MP14 (CH)
MP38 (CH)
MP38 (CH)
MP6 (CH)
MP6 (CH)
MP35 (CH)MP38 (CH)
MP38 (CH)
MP34 (CH)
MP55 (CH)MP34 (CH) MP34 (CH)
MP2 (CH)
MP29 (PA)
MP27 (PA) MP31 (CH)
MP31 (CH)
MP23 (PA)
MP41 (PA)
MP49 (CH)
MP50 
(CH) MP48 (CH)
MP38 (PA)
MP651 (PA)
MP31 (CH)
MP31 (CH)
MP46 (CH)
MP47 (CH) MP14 (PA)
MP31 (CH)
MP1 (PA)
MP20 (PA)
MP19 (PA)
MP43 (PA)MP28 (PA) MP30
(PA)MP31 (CH) MP31 
(CH)
MP33 
(PA)MP40 
(PA)MP31 (CH)MP54 (CH)MP60 (CH)
MP24 (PA)MP15 (PA)
MP31 (PA)
MP42 (PA)
MP40 (CH)
MP9 (CH)J1 (CH)
MP31 (CH)
MP58 (CH)
MP241 (M)
MP245 (M)MP244 (M)
MP544 (M)MP741 (M)
MP8 (CH)
MP8 (CH)
MP24 (M)MP52 (M)
MP53 (M)
MP2 (CH)MP8 (CH)MP8 (CH)
MP32 (M)
MP9 (CH)
MP9 (CH)
MP9 (CH)
MP9 (CH)
UX–910MP7 (CH)
MP7 (CH) MP7 (CH) MP7 (CH)
MP10 (CH)
IC21 (M)
MP22 (M)
MP39 (CH)
MP16 (CH)MP36 (CH)
MP36 (CH)
MF1 (CH)
MP5 (CH)
MP39 (CH)
MP39 (CH)
MP39 (CH)
MP35 (CH)MP35 (CH)
MP35 (CH)
MP33 (CH)MP33 (CH) MP11 (PL)MP33 (CH)
MP35 (CH)
MP33 (CH)MP33 (CH)
MP3 (CH)
MP45 (CH)
MP34 (PA)MP31 (CH)
MP39 
(PA)MP25 
(PA)MP61 
(CH) MP32 
(PA) MP16 (PA)MP45 
(CH)
MP31 
(CH)
MP26 (PA)
MP41 (CH)
J2 (CH)
MP10 (CH)
MP42 (CH)
MP58 (CH)
MP44 (CH)MP43 (CH)
MP1 (CH)
Unit abbreviations : (CH) : CHASSIS PARTS (M) : MAIN UNIT  
(PA) : PA UNIT (PL) : PLL UNIT  
						

							MP1 8930014140 Earth spring (D) 1
MP7* 8510012310 2157 DBM case 1
MP8* 8510013620 2355 A-filter  case 1
MP9* 8510002020 MIX shield case 1
MP10* 8510012310 2157 DBM case 1
MP11* 8510013390 2355 MIX case 1
MP12* 8510013890 2355 V-A shield plate 1
MP13* 8510013630 2355 U-A shield plate 1
MP14 8510010460 1691 main shield plate 1
MP15 8510010460 1691 main shield plate 1
MP16 8860001130 2177 rug 1
MP17* 8510002020 MIX shield case 1
MP19 8930054530 2355 earth spring 1
MP20 8930014140 Earth spring (D) 1
MP21* 8510013560 2355 U-L plate 1
MP22* 8510013680 2355 U-R plate 1
MP23 8930017190 Earth spring (F) 1
MP24 8930054530 2355 earth spring 1
MP25 8930017200 752 earth spring 1
MP26 8510004650 505 shield palte 1
MP27 8930014140 Earth spring (D) 1
MP28 8930014140 Earth spring (D) 1
MP29 8930017190 Earth spring (F) 1
MP30 8510002280 VCO shield plate (A) 1
MP31 8930014140 Earth spring (D) 1
MP32 8930017200 752 earth spring 1
MP33 8930017200 752 earth spring 1
MP34 8930017190 Earth spring (F) 1
MP38 8930006930 365 earth spring 1
MP39 8930050150 Thermally sheet (K) 1
MP40 8930014140 Earth spring (D) 1
MP41* 8930024170 Earth spring (G) 1
MP42 8510002280 VCO shield plate (A) 1
MP43 8930006930 365 earth spring 1
MP300 8950000180 Cable tie -80 1
MP301 8950000180 Cable tie -80 1
MP501* 8510012310 2157 DBM case 1
MP502* 8510012310 2157 DBM case 1
MP511* 8510002020 MIX shield case 1
MP651 8860000100 Earth rug B2 (M2.6) AG BS 1 REF. NO.
[PA UNIT]
ORDER NO. DESCRIPTION QTY.
J1 6510000330 Connector NR-DS 1
MP1 8010018161 2356 case-1 1
MP2 8110007260 2356 cover 1
MP3 8930052450 2355 earth plate 1
MP5 8810008660 PH BT M3 X 8 NI-ZU 2
MP7 8810008660 PH BT M3 X 8 NI-ZU 8
MP8 8810008660 PH BT M3 X 8 NI-ZU 14
MP9 8810007230 Setscrew H M3 X 8 4
MP10 8310049280 Serial No seal UX-910 1
MP11 8930053470 Thermmaly sheet (R) 1
MP12 8930053930 Thermmaly sheet (S) 1
MP14 8930001180 Earth holder 1
MP15 8930054190 Two sided tape (AB) 1
MP16 8930054520 Shield sponge (E) 1
MP17 8930054980 Ferrite sheet (L) 1
MP18 8930030380 Ferrite sheet (C) 1
[UX-910 CHASSIS PARTS]
REF. NO. ORDER NO. DESCRIPTION QTY.
REF. NO.
MP1* 8510013510 2355 VCO case 1
MP2* 8510013510 2355 VCO case 1
MP7* 8510011160 1897 PLL shield case 1
MP8* 8510010850 1897 D/A case 1
MP9* 8510011160 1897 PLL shield case 1
MP10* 8510010850 1897 D/A case 1
MP11 8930043110 Rubber sheet (AD) 1
[PLL UNIT]
ORDER NO. DESCRIPTION QTY.
REF. NO.
MP1 8930041830 Sponge (ER) 1
MP1851 8930014140 Earth spring (D) 1
[MAIN UNIT]
ORDER NO. DESCRIPTION QTY.
REF. NO.
MP1 8410002390 2355 PA heatsink 1
[DRV BOARD]
ORDER NO. DESCRIPTION QTY.
REF. NO.
F1 5210000090 Fuse FGB 30A 2
F2 5210000130 Fuse FGB 4A 1
W1 8900009960 Cable OPC-657A 1
MC1 7700000600 Microphone HM-12 1
[UNPACKING]
ORDER NO. DESCRIPTION QTY.
MP21x 8510013610 2356 plate 1
MP22 8930011460 566 PA module holder 1
MP23 8930014140 Earth spring (D) 1
MP24 8930054820 Ferrite sheet (K) 1
MP31 8930014140 Earth spring (D) 1
MP32 8930001170 Earth spring (A) 1
MP51* 8510013300 2356 shield plate 1
MP52 8510013310 2356 shield cover 1
MP53 8930054470 Ferrite sheet (I) 1
MP71 8930001170 Earth spring (A) 1
MP81* 8510012400 2177 D/A case 1
MP91 8510013820 2356 A-shield  plate 1
MP181* 8510013720 2356 S-plate assembly 1
MP182 8510002280 VCO shield plate (A) 1
MP183 8510013690 2356 S-plate 1
MP184 8930004070 Earth spring (C) 1
MP241 8510013830 2356 B-shield plate 1
MP242 8930030380 Ferrite sheet (C) 1
MP243 8510002280 VCO shield plate (A) 1
MP244 8930054900 2356 earth spring 1
MP245 8930054900 2356 earth spring 1
MP251 8510010460 1691 main shield plate 1
MP281 8930014140 Earth spring (D) 1
MP312 8950000180 Cable tie -80 2
MP331 8930054470 Ferrite sheet (I) 1
MP501* 8510013490 2356 PLL case 1
MP541* 8510013500 2356 VCO case 1
MP542 8930021270 VCO shield plate 1
MP543 8930007720 Insulation sheet AB 1
MP544 8930054810 Ferrite sheet (J) 1
MP545 8930043831 Insulation sheet FF-1 1
MP601* 8510012750 1386 PLL case 1
MP602* 8510010850 1897 D/A case 1
MP603 8930054520 Shield sponge (E) 1
MP661 8930014140 Earth spring (D) 1
MP701* 8510000881 194 VCO case-1 1
MP702 8510003460 194 VCO case cover (A) 1
MP703 8930038430 778 A-sponge 1
MP741 8930014140 Earth spring (D) 1
[UX-910 MAIN UNIT]
REF. NO. ORDER NO. DESCRIPTION QTY.
7 - 4
REF. NO.
MP1 8810003380 Setscrew C M3 X 10 4
[UX-910 UNPACKING]
ORDER NO. DESCRIPTION QTY.
Screw abbreviationsBT: Self-tapping PH: Pan head
FH: Flat head Bih: Binding head
NI: Nickel NI-ZU: Nickel-zinc
BS: Brass ZK: Black
* Refer to Section 9 BOARD LAYOUTS. 
						

							8 - 1
• TRANSISTORS AND FET’S
SECTION 8 SEMI-CONDUCTOR INFORMATION
B
ECB
ECB
ECB
C
E
BE
C
BE
C
BB
EE
C
C
B
ECB
ECB
EC
B E
EE
E CB
E C
B
ECB
C
EB
ECB
ECB
EC
B
EC
B E
EE
E CB
E CB
ECE
CB
EE
C B
E
BE
C
B
E CB
C
EB
C
EB
C
EB
EC
B
ECS
DGD
GSS
DGS
DG
D
GSS
DGS
DGE
CB
EG
S
DS
2SA1162 GR  2SA1586 GR  2SA1588 GR  2SB1132 T100 R 2SB1133 R 
2SB1201 S 2SC2712 BL  2SC2712 GR  2SC2714 O 
2SC3102 
2SC3356 T2B  2SC3357 T2  2SC4081 T107 R  2SC4116 GR 
2SC4215 O 
2SC5107 O  2SC5125 2SC5193 T1  2SC5454 R54 2SC5508
2SD1585 K  2SD1619 T TD  2SD1664 T100Q  2SD1801 S TL 
2SD2216 S 
2SD2345 S2SJ364 Q 
2SK302 Y 2SK508 K52 T2B 2SK880 Y 
2SK882 GR 
2SK1577 2 T7  2SK1740  2SK1829 
2SK2854  (Symbol: SG) (Symbol: SG) (Symbol: ZG) (Symbol: BAR) (Symbol: B1133)
(Symbol: B1201) (Symbol: BL) (Symbol: LG) (Symbol: QO)
(Symbol: None)
(Symbol: R24) (Symbol: RK) (Symbol: BR) (Symbol: LG)
(Symbol: QO)
(Symbol: MFO) (Symbol: T88) (Symbol: R54)(Symbol: T79)
(Symbol: None) (Symbol: DB) (Symbol: DAQ) (Symbol: CE)
(Symbol: Y)
(Symbol: 1Z)
(Symbol: 4MQ) (Symbol: TY)(Symbol: K52)(Symbol: XY)
(Symbol: TGR)
(Symbol: P2) (Symbol: IJ) (Symbol: K1)
(Symbol: UP) 
						

							8 - 2
G1
G2S
DG1
G2S
D
D
SG2
G1B
ECB
ECB
EC
B
ECB
ECB
ECB
ECB1
E
B2C1
C2
B
EC
E1 B1
B2C1
C2
E1
C2 B1C1
E2 B2
E1
C2 B1C1
E2 B2E1
C2 B1C1
E2 B2
G
S
DS
G
SS
D
G S
SS
S DG
S D
G
D
S
2SK2855 2SK2973  2SK2975 3SK131 T2 LA  3SK177 T1B U73
3SK241 R CPH3404-TL DTA114 EE TL  DTA114EUA T106
DTA144EUA T106
DTC114EUA T106 DTC114TUA T106 DTC144EUA T106 DTC144TU T107
FMW1 T148 
NE34018 T1 RN2425  SRFJ7044 XP1113 XP4312 
XP4315 XP4601  (Symbol: UT) (Symbol: K1) (Symbol: V12) (Symbol: U73)
(Symbol: DU) (Symbol: KD) (Symbol: 14) (Symbol: 16)
(Symbol: 16)
(Symbol: 24) (Symbol: 04) (Symbol: 26) (Symbol: 06)
(Symbol: W1)
(Symbol: V63) (Symbol: RE) (Symbol: SRFJ7044) (Symbol: 7L)(Symbol: 7T)
(Symbol: CB) (Symbol: 5C)
G
S
DSG
S
DS 
						

							8 - 3
• DIODES
C A1
A2ACC A1
A2Apink
C
A
CA1
A2C1
C2
NC
ACC A1
A2AC
A1
C2 C1A1
C2 C1
AC
A
C
ACAC
AC
AC
ACAC
ACACACAC
AC
red dot
AC
1SS301 1SS355 1SS375-TL 1SS385 1SV214 
1SV217 1SV237 1SV239 1SV265 TL 
1SV286 
1SV307 1SV308 DA221  DAN202 U T107 
DAN222TL 
DAP202K T146 DAP222 TL  HSB88WSTR HSM88AS TR 
HSU88TRF 
MA29B MA2S111 MA357 
MA4PH224
MA728 
MA77 
MA8030 H MA8043 L MA8047 H 
MA8068 M 
MA8082 M  RB706F-40 T106  SB07-03C  (Symbol: B3) (Symbol: A) (Symbol: FH) (Symbol: 09) (Symbol: T1)
(Symbol: T6) (Symbol: BB) (Symbol: TC) (Symbol: LV)
(Symbol: T7)
(Symbol: TX) (Symbol: TX) (Symbol: K) (Symbol: N)
(Symbol: N)
(Symbol: P) (Symbol: P) (Symbol: Silver line)(Symbol: C1)
(Symbol: 9)
(Symbol: Y) (Symbol: A) (Symbol: 7K)
(Symbol: Red dot)
(Symbol: 2A)
(Symbol: 4B) (Symbol: 3^0)(Symbol: 4_3)(Symbol: 4^7)
(Symbol: 6-8)
(Symbol: 8-2) (Symbol: 3J) (Symbol: J) 
						

							9 - 1
9-1 VR-A BOARD
SECTION 9 BOARD LAYOUTS
• TOP VIEW
GND
J126
1
to DISPLAY 
board J25
MAVR
NC
NCMSVR+5V
• TOP VIEW
GND
J126
1
to DISPLAY 
board J105
RIVR
NC
NCSFVR+5V
9-2 VR-B BOARD
• TOP VIEW
GND
2
J16
1
to DISPLAY 
board J115
SAVR
NC
NCSSVR+5V
9-3 RIT BOARD 
						

							9 - 2
• BOTTOM VIEW (RIT BOARD)• BOTTOM VIEW (VR-A BOARD)
• BOTTOM VIEW (VR-B BOARD) 
						

							9 - 3
9-4 FUNC BOARD• TOP VIEW
KST1
KST3
KRT1KST2
J1
1526
to DISPLAY unit J3
KRT0GND
9-8 VARISTOR-A BOARD• TOP VIEW
V-A2
GND
V-A1to PA unit J652
9-5 MIC BOARD• TOP VIEW
9-6 JACK BOARD• TOP VIEW
9-7 DRV BOARD• TOP VIEW
DRVO
DRVO
GND
GND GND
GND
DRVI
DRVIto PA unit J932
to PA unit J931
9-9 VARISTOR-B BOARD• TOP VIEW
V-B2
GND
V-B1to PA unit J6539-10 VARISTOR-C BOARD• TOP VIEW
V-C2
GND
V-C1to PA unit J651 
						

							9 - 4
• BOTTOM VIEW (VARISTOR-A BOARD)• BOTTOM VIEW (VARISTOR-B BOARD)• BOTTOM VIEW (VARISTOR-C BOARD)
• BOTTOM VIEW (FUNC BOARD)
• BOTTOM VIEW (MIC BOARD)
MIC
J2210
19 to DISPLAY board J6
GND
PTT
MIUD
NCMICEAFOMSQLS+9VGND
• BOTTOM VIEW (JACK BOARD)
PHIN
J251
62
to DISPLAY 
board J5
SSPO
MSPOGNDPHGGND
• BOTTOM VIEW (DRV BOARD)