Icom Ic-r2 Communications Reciever Service Manual

Pin Port
Description
number namePin Port
Description
number name
4 - 5
26
27
28
29
30
31
32
33
39
42
43
44, 45
46
47
48
50
51
52
53
54LIGHT
+3SC
POWERC
B3
B2
B1
KSQL
RESET
EDA
PCK/IS
ECK/I3
I2, I1
PSTB
PDA
DBL2
300MC
GC
800MC
UHFC
VHFCOutput LCD backlight control signal.
High : Lights ON
Outputs +3S requlator control singal
for the receiver circuit.
Low : Receiving.
Outputs +3V requlator control singals.
Outputs high-pass filter select signal.
Low : When frequency 15 to 30
MHz are displayed.
Outputs...

5 - 1
5-1 PREPARATION
The receiver (IC-R2) must be adjusted on the adjustment mode after programmed adjustment frequency data into memory chan-
nel. When you program adjustment frequency data into memory channel, optional CS-R2 
PROGRAMMING SOFTWARE, OPC-478
CLONING CABLE are requird.
Ô ÔREQUIRED TEST EQUIPMENT
Ô ÔSOFTWARE INSTALLATION
NOTE: Before using the program, make a backup copy of the original disk. After making a backup copy, keep the original disk
in a safe place.
qBoot up DOS.
wInsert the...

5 - 2
nCONNECTION
DC power supply
    3.0 V/1.0 A-
+
Standard signal
     generator
AD-92SMA 
Optional SMA–BNC adaptor
1/8 (3.5 mm)
3-conductor plug Terminator for the entering
adjustment mode
68 k½
-
+
to [SP] jack 

5 - 3
5-2 PLL ADJUSTMENT
1ST VCO
LOCK
VOLTAGE
(SHIFT ON)
(SHIFT OFF)
2ND VCO
LOCK
VOLTAGE
REFERENCE
FREQUENCY
DETECTOR
OUTPUT
VOLTAGE
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITIONMEASUREMENT
VALUEPOINT
UNIT LOCATION UNIT ADJUST
1
2
1
2
1
2
1
1• Displayed frequency :
493.300 MHz 
• Receiving
• Displayed frequency :
282.900 MHz 
• Receiving
• Displayed frequency :
0.495 MHz 
• Receiving
• Displayed frequency :
493.295 MHz 
• Receiving
• Displayed frequency :
430.000 MHz 
• Receiving
• Displayed frequency :...

5 - 4
L21
Detector output voltage adjustment
LV 1
1st VCO lock voltage 
check point
QUADDetector output voltage check point
LV 22nd VCO lock voltage check point
F
PLL Reference Frequency 
check point 

5 - 5
5-3 RECEIVER ADJUSTMENT
VHF
SENSITIVITY
UHF
SENSITIVITY
S-METER
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITIONMEASUREMENT
VALUEPOINT
UNIT LOCATION UNIT ADJUST
1
1
1
2
3
4
5
6• Displayed frequency :
(tk ch) 145.600 MHz
• Connect an SSG to the antenna
connector and set as :
Level : 1 µV
*(–107 dBm)
Modulation : 1 kHz
Deviation : ±3.5 kHz
• Receiving
• Displayed frequency : 
(tk ch) 435.600 MHz
• Connect an SSG to the antenna
connector and set as:
Level : 1 µV
* (–107 dBm)
Modulation : 1 kHz
Deviation :...

5 - 6
SENVHF and UHF sensitivity check point. 

S.=Surface mount
IC1 1130008970 S.IC HD74LV00TELL
IC2 1130009020 S.IC X25650S8I-2.5T6
IC3 1180001820 S.IC XC62FP3002MR
IC4 1180001720 S.IC S-81332HG-KC-T1
IC5 1110004620 S.IC S-80725SL-AN-T1
IC9 1110003800 S.IC NJM2904V-TE1
IC10 1110004790 S.IC XC6371A351PR
IC11 1140007760 S.IC M38267M8L-218GP [USA] only
1140007720 S.IC M38267M8L-222GP other
IC14 1110004520 S.IC M5222FP 600C
IC15 1190000710 S.IC TA31056F (TP1)
Q3 1510000670 S.TRANSISTOR 2SA1588-GR (TE85R)
Q4 1510000670 S.TRANSISTOR 2SA1588-GR (TE85R)
Q6...

S.=Surface mount
C1 4030014200 S.CERAMIC ECUE1H101JCQ
C3 4030013970 S.CERAMIC C1005 JB 0J 104K-T-N
C4 4550006760 S.TANTALUM TEMSVB2 1A 336M-8R
C5 4030013850 S.CERAMIC ECUE1E102KBQ
C6 4030008680 S.CERAMIC C2012 JF 1C 105Z-T-A
C8 4030014120 S.CERAMIC ECUE1H100CCQ
C9 4030014120 S.CERAMIC ECUE1H100CCQ
C11 4030013970 S.CERAMIC C1005 JB 0J 104K-T-N
C12 4030013950 S.CERAMIC C1005 JB 1A 393K-T-N
C13 4030013970 S.CERAMIC C1005 JB 0J 104K-T-N
C14 4030013890 S.CERAMIC C1005 JB 1H 152K-T-N
C15 4510007130...

S.=Surface mount
D25 1790001620 S.DIODE ISV308 (TPL3)
D29 1790001620 S.DIODE ISV308 (TPL3)
D31 1790000850 S.DIODE MA132WK (TX)
D32 1790001620 S.DIODE ISV308 (TPL3)
D34 1790001620 S.DIODE ISV308 (TPL3)
D36 1790001620 S.DIODE ISV308 (TPL3)
D42 1790001260 S.DIODE MA2S077-(TX)
D43 1790001260 S.DIODE MA2S077-(TX)
D44 1790001260 S.DIODE MA2S077-(TX)
D46 1790001260 S.DIODE MA2S077-(TX)
D47 1790001620 S.DIODE ISV308 (TPL3)
D50 1790001620 S.DIODE ISV308 (TPL3)
D52 1790001620 S.DIODE ISV308 (TPL3)
D53 1790001250...