Cobra 40X 40 Channel AM Mobile CB Transceiver User Manual
- June 13, 2024
- Cobra
Table of Contents
- Cobra 40X 40 Channel AM Mobile CB Transceiver
- Functional Block Diagram
- PLL Block Diagram
- P.C.B Wiring Diagram
- Wiring Diagram (Chassis and Microphone Pins)
- Integrated Circuits
- Voltage Chart
- Test Equipment Setup
- Exploded View
- Exploded View Part List
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
Cobra 40X 40 Channel AM Mobile CB Transceiver
Functional Block Diagram
PLL Block Diagram
Parts Layout. (Component Side)
Parts Layout. (Pattern Side)
P.C.B Wiring Diagram
Wiring Diagram (Chassis and Microphone Pins)
Integrated Circuits
TRANSISTORS
DIODES
Voltage Chart
- TRANSISTOR
- CONDITIONS MEASURED ON 19CH
- NO SIGNAL
- NO MODULATION
| TR NO | QUOTE | QI05 | QI06 | QI07 | Ql09 | 0110 | Q201 | 0202 |
|---|---|---|---|---|---|---|---|---|
| POSITION | NB OFF/ON | SQ | ||||||
| TR PIN | RX | TX | RX | TX | RX | TX | RX | TX |
| RX | TX | |||||||
| B | 1.50 | 0.10 | 1.43 | 0.18 | I. 28 | 0.13 | 0. 75 | 0. 73 |
| 0.00 | -o.56 | 0.67 | 0.75 | 0.00 | ||||
| 0.75 | 0,73 | 7.70 | 7.73 | 0.00 | 0.00 | |||
| E | 0.89 | 0.20 | 0.94 | 0.00 | 0.61 | 0.00 | 0.00 | 0.00 |
,..”
| ,0...,.0.,0..| 0.00| 0.00| 0.00| 0.00
0 n| 0 “| 8.| 8 32| |
C| 12.09| 11.9:1| 10.1| 12.16| 12.36| 12.16| 6.76| 6.32| 0.00| 0.00| 0.00|
0.00| o.70| 0.04| 3.:14| 0.00
6. 76| 6.32| 2.32| 2.44| 0,00| 0.00
TRNO| 0203| 0204| Q205| 0206| Q301| Q302| 0303|
POSITION| | | | | | | |
TRAIN| RX| TX| RX| TX| RX| TX| RX| TX| RX| TX| RX| TX| RX| TX| |
B| 0.37| 0.69| II.9:1| 2.06| 9.04| 9.01| 8.40| 7.61| 0.29| 1.40| 0.00| 0.01|
0.00| 0.04| |
E| 0.00|
0.00
| 12.4| 1.40| 8.40|
8 . 38
| 8.40| 8.38|
0.00
|
0.68
|
. 0.00
|
0.00
|
0.00
|
0.00
| |
C| 3.38| 0.0:I| 12.9| 6.39| 12.79| 11.96| 1.28| 8.29| 12.97| 12.00| 13.6|
9.56| 13.:1| 11.28| |
CONDITIONS MEASURED ON 19CH
- NO SIGNAL
- NO MODULATION
IC
| IC NO | ICPINNO | RX | TX | ICON | CPINNO | RX | TX |
|---|---|---|---|---|---|---|---|
| IC201 | I | 13.72 | 13.40 | IC202 | II | 3.6:1 | 3.59 |
| 2 | 12.61 | 12.34 | 12 | 4.02 | 4.01 | ||
| 3 | 4.01 | 3.91 | 13 | 0.00 | 0.00 | ||
| 4 | 8.14 | 7,99 | 14 | 1.42 | 4.56 | ||
| 5 | 1.347 | 1.20 | 15 | 1.845 | 1.75 | ||
| 6 | 3.41 | 3. 30 | 16 | 1.845 | 1.75 | ||
| 7 | 3.39 | 3.33 | 17 | 1.202 | 2.48 | ||
| 8 | 1.342 | I. 32 | 18 | 8.15 | 8.14 | ||
| 9 | 0,00 | 0.00 | 19 | 3.75 | 3.63 | ||
| 10 | 6.80 | 6.67 | 20 | 7.49 | 0.795 |
IC202
| I| 8.15| 8.15|
IC203
| I| 2.58| 2.55
2| 0.04| 0.04| 2| 1.90| 1.90
3| 0.04| 0.04| 3| I. 31| 1,34
4| 8. 15| 8.15| 4| 1.90| 2.63
5| 8.15| 8.15| 5| 0.00| 0.00
6
|
0.04
|
0.04
| 6| 1.294| 7.88
7| 0.04| 0.04| 7| 2.15| 2.10
8| 0.04| 0.04| 8| 5.96| 6.28
9| 0.04| 0.04| 9| 1.292| 7.88
10| 0,00| 0.00| | |
- FET
- CONDITIONS MEASURED ON 19CH
- NO SIGNAL
- NO MODULATION
| FET NO | 0102 | OK>3 |
|---|---|---|
| POSITION | ||
| FET PIN | RX | TX |
| GATE I | 0.00 | 0.00 |
| GATE2 | 0.45 | 0.05 |
| DRAIN | 11.73 | 11.22 |
| SOURCE | 7.717 | 0.540 |
| FETNO | 0104 | 0108 |
| POSITION | NB OFF/ON | |
| FET PIN | RX | TX |
| GATE | 0,00 | 0.00 |
| 0.00 | 0.03 | |
| DRAIN | 12.5 | 11.7 |
| 6.36 | 6.37 | |
| SOURCE | 2.23 | 2.22 |
| 1.96 | 1.94 |
Test Equipment Setup
Exploded View
Exploded View Part List
REF NO/PART NO/DESCRIPTION
| 1 | 800110390 | Escutcheon | 33 | 832140040 | Cap (Speaker) |
|---|---|---|---|---|---|
| 2 | 783133030 | Over Lay | 34 | 01130040E | Transistor 2SC2078(E) |
| 3 | 821130010 | Konb (Channel) | 35 | 01130070E | Transistor 2SC2314(E) |
| 4 | 82213007B | Knob (Control) | 36 | 900140960 | Mica |
| 5 | 702130760 | Front Body | 37 | 811140300 | Lens |
| 6 | 862140230 | 4P Connector Socket | 38 | 736140010 | Holder (Speaker) |
| 7 | 722140880 | Bracket (4P MTG) | 39 | 711120580 | Cover (Upper) |
| 8 | 865130010 | Meter | 40 | 712120660 | Cover (Bott_om) |
| 9 | 866130020 | Rotary S.W | 41 | 729130570 | Bracket (Set Mtg) |
| 10 | 15503211A | Resistor Variable 50KA | 42 | 60000400A | Securing Screw |
| (W/OFF-ON S.W) | 43 | 664005210 | Lock Washer B Type M5 | ||
| 11 | 15103201B | Resistor Variable 10KB (WO/S.W) | 44 | 625512110 | Tapping Screw |
(T.H)
12| 15503201B| Resistor Variable 50KB (WO/S.W)| | | 5×12-1S
13| 866140200| Slide S.W| 45| 660013270| Washer Rubber 7×1.5T
14| 701120470| Main Body| 46| 413207014| P.C.B Rotary S.W
15| 41112901A| P.C.B Main| 47| 784142840| Name Plate
16| 861140170| Earphone Jack| 48| 903140490| Strip Felt
17| 861140080| Lug Plate| 49| 865130070| Speaker
18| 864142500| ANT| 50| 410212060| P.C.B 4P Connector
19| 738140340| Holder| 51| 904140030| Felt (Slide S.W)
20| 738140470| Holder| 52| 725140040| Bracket (MIC MTG)
21| 021100300| I.C KIA7205CP| 53| 664004210| Lock Washer B Type M4
22| 859140390| Bushing| 54| 624410210| Tapping Screw {T.H)
23| 660029110| Square Washer| | | 4×10-2S
24| 662003110| Spring Washer| 55| 723140020| Bracket {Rotary S.W)
25| 651003110| NUT M3-1S| 56| 675203230| Rivet
26| 030003000| L.E.D Lamp| 57| 631306020| Tap Tite Screw (P.H) 3×6
27| 030004100| L.E.D Display| 58| 611204010| Machine Screw (P.Hl M2x4
28| 414207030| P.C.B LED Lamp| 59| 612305010| Machine Screw (F.H) M3x5
29| 41420702A| P.C.B LED Display| 60| 613308010| Machine Screw (B.H) M3x8
30| 901280| Insulation Plate| 61| 613316010| Machine Screw (B.H) M3x 16
31| 815130030| Housing (3P Connector)| 62| 623306210| Tapping Screw (B.H)
3×6-2S
32| 904340500| Insulation Ring| 63| 623310220| Tapping Screw (B H) 3×10 2S
PARTS LIST FOR COBRA MODEL 40X
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