Icom IC-9700 Service Manual Addendum page 61

(Amended page)
June 2019
• MAIN UNIT (9/13)
3R3V
DRESL
DRESL IC2801
MAIN UNIT MCK
MDAT MSTB 1 16
(1/13)
MDAT STR V+
MDAT 2 15
D OE
MCK 3 14
CLK Q5
MCK 4 13
DRESL Q1 Q6
DSTB 5 12
MAIN UNIT DSTB Q2 Q7
MSTB 6 11
(2/13)
MSTB Q3 Q8
PASTB 7 10
PASTB Q4 Q'S
8 9
GND QS
MC74HC4094ADTR2G
3R3V
DRESL
IC2811
MSTB 1 16
STR V+
2 15
D OE
MCK 3 14
CLK Q5
4 13
Q1 Q6
5 12
Q2 Q7
6 11
Q3 Q8
7 10
Q4 Q'S
8 9
GND QS
MC74HC4094ADTR2G
3R3V
DRESL
IC2821
1 16
PASTB
STR V+
2 15
MDAT
D OE
3 14
MCK
CLK Q5
4 13
Q1 Q6
5 12
Q2 Q7
6 11
Q3 Q8
7 10
Q4 Q'S
8 9
GND QS
MC74HC4094ADTR2G
Explanatory notes
R2801
ISPBS
ASQLS
Table 1
AMS
NASBS
When TX with ACC SEND
100
When TX except for ACC SEND
When RX
R2802
ISPAS
AFOS
SPBS
SPAS
100
Table 1: A
SENI
R2811
12PONS
12POFS
12EPS
12ATONS
100
R2812
12RSS
Table 1: B
SDONS
MDONS
UMODS TRAS
100
R2821
VATONS
UPONS
UEPS
UATONS
100
R2822
VEPS
VPONS
5.0 V
CP2822
CP06S IC2852
CP2821
CP06S 8V 1 5
VIN VOUT
100 2
VSS
3 4
CE NC
XC6209F502MR
IC2851
11
Vcc VrefU
REF1V 12
Ao11
REF2V 13
Ao12
14
Do
DSTB 15
LD
MCK 16
CLK
MDAT 17
DI
18
Ao1
19
Ao2
20
GND VrefL
R2A20169SA
TX Line
RX Line
Voltage Line (14V)
Voltage Line (8V)
R2872
470k
R2871
DRIV
47k
R2961
REF1V
3.9k
R2962
REF2V 2
330k
3
R2966
56k
8
V+ IC2961
GND
NJM2746V
4
14V
The underlined parts have been updated from the addendum of the previous version, or from the original page.
The waveform and voltage indications have been added on the original page.
RTTY keydown: 3.3 V
A B C
Unkeyed: 0 V
3.3 V 3.3 V 0 V
3.3 V 0 V 0 V
0 V 3.3 V 6.8 V
Q2931
L2SC4081
R2931 D2931
33k L1SS400
Table 1: C
Q2932
DSC7004S0
R2935
Q2933 150
LDTA114YE
3R3V
REFV
R2851
DTXD
ICCV DRXD
10 100
9
Ao10
8 R2852
Ao9
7
Ao8
6 POCV
Ao7
5 12DIDV
Ao6
4 12FIDV
Ao5
3
Ao4
2 100
Ao3
1 DOT
R2853
UDIDV
UFIDV DASH
VFIDV
VDIDV CIV
100
CIVE
C2872
R2873 0.1
82k
2
R2874
1
3
100 Q2871
IC2861
L2SC4081 R2876
NJM2904CRB1 DRIVP
10
R2963
R2965
2.2k
56k
IC2961
NJM2746V
IC2961
R2964
1 6
R2971
7
56k R2870
5
100
R2968 NJM2746V 100
2.5 V
8
56k
2.0 V
IC2861 V+
NJM2904CRB1 GND
4
Table 2: A
10-9a
When SQL is open: 3.2 V
Other than the above: 0 V
Q2951
LDTC143ZE
R2951
10k
RTTY keydown: 3.3 V
Unkeyed: 0 V
R2922
Q2921
4.7k When SQL is open: 3.2 V
L2SC4081
R2921 D2921
Other than the above: 0 V
33k L1SS400
J2911
6
EP2916
MMZ1005B601C 7
EP2917
MPZ2012S601A 1
EP2911
EP2918 MMZ1005B601C 8
EP2913 MMZ1005B601C 3
3
MPZ1608S601A
C2942 EP2914 4
MMZ1005B601C
2.2 2
R2941
C2941 EP2915 5
2.2 MMZ1005B601C
100
IC2901
16 1
FORCEOFF EN
15 2
C2903
VCC C1+
14 3 0.1
C2904 EP2901
GND V+
13 4 0.1
DOUT C1-
12 5
C2905 EP2902
FORCEON C2+
11 6 0.1
DIN C2-
10 7 C2906
INVALID V-
0.1
9 8 R2901
ROUT RIN
100
MAX3221IPWR R2902
100
DOT keyed: 0 V DASH keyed: 0 V
Unkeyed: 3.2 V Unkeyed: 3.2 V
EP2893
MMZ1005B601C
EP2892
MMZ1005B601C
EP2891
MMZ1005B601C
CP2891
SHORT1005
Table 2
When the FAN is not rotating
(▲THML * <0.41 V)
When the FAN is rotating fast
*
(▲THML >1.65 V)
* The highest voltage line among the THML/UTHML/12THML lines (see on page 10-4).
EP2881
MPZ1608S601A
R2861 R2863 R2864 R2881
FANVP
Table 2: C
Q2881
100k 390k 100 470
DSC7004S0
Table 2: B
6 FAN+
7
FAN-
5
FANV
IC2861
NJM2904CRB1
* Refer to the PARTS LIST for the value and name of components.
14V
14V
8V MAIN UNIT
(5/13)
3R3V
AMS
MAIN UNIT
AMS
NASBS
(8/13)
NASBS
ISPBS
ISPBS
ISPAS
ISPAS
AFOS
AFOS MAIN UNIT
SPBS
(7/13)
SPBS
SPAS
SPAS
UMODS
UMODS
MDONS
MDONS MAIN UNIT
SDONS
SDONS (10/13)
VATONS
VATONS
VEPS
VEPS
VPONS
VPONS
UATONS
UATONS
UEPS
UEPS MAIN UNIT
UPONS
(4/13)
UPONS
12ATONS
12ATONS
12EPS
12EPS
12POFS
12POFS
12PONS
12PONS
12RSS MAIN UNIT
12RSS
(10/13)
REFV MAIN UNIT
REFV
(13/13)
ICCV
ICCV MAIN UNIT
POCV
(8/13)
POCV
[ACC]
12DIDV
12DIDV
12FIDV
12FIDV
UDIDV
UDIDV MAIN UNIT
1. RTTY
UFIDV
UFIDV (4/13)
7 6 2. GND
VFIDV
VFIDV
3. SEND
VDIDV
VDIDV
4. MOD
DRIVP
8 1
5. AF
MAIN UNIT
DRIVP
6. SQLS
(10/13)
7. 14V
5 SENI
4
SENI
8. ALC
TRAS
2 MAIN UNIT
TRAS
DASH
(2/13)
DASH
DOT
DOT
CIV
MAIN UNIT
CIV
CIVE
(6/13)
CIVE
DTXD
DTXD MAIN UNIT
DRXD
DRXD (1/13)
MAIN UNIT
EALC
EALC
(8/13)
RTKI MAIN UNIT
RTKI
(2/13)
MAIN UNIT
AAF
(7/13)
AMOD
J2901
MMZ1005B601C
[DATA]
MMZ1005B601C
J2891
[KEY]
[REMOTE]
A B C
0 V 0 V 0 V
2.4 V 11.7 V 10.9 V
FAN
J2881
1
2