■ Parts description and reading in schematic diagram
1.The parts specification of resistors, capacitors and coils are expressed in designated code. Please check the parts description by the following code table.
2.Some of transistors and diodes are indicated in mark for the substitution of parts name. Please check the parts name by the following code table.
3.Voltages and waveforms were taken with a video color bar
4.Voltages were taken with a
Capacitor Reading
Example 2000 K K 1000 BG
Resistor Reading
Example | 1/2 | D | J 10K B | ||||||||||||
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Example | 6 |
| W | K | 8.2 |
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| Z (Carbon fuse) | |||||||||
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| B |
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Example | 1/2 | C | K | 1M |
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| K indicates in K | |||||
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| M indicate in M |
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| Resistance value | |||||
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| Tolerance (see below table) | |||||
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| Material (see below table) | |||||
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| Rated wattage (W) |
Note: Resistor which is indicated with resistance value only are 1/6W carbon resistor. Resistor which is indicated with materi- al, tolerance and value are 1/4W rated wattage.
Characteristic
Example 160 E M 10
Capacitance value
Excepting electric capacitors, all capacitance values of less than 1 are expressed in ∝F and more than 1 are in pF.
Tolerance
Type
Rated voltage
Material table
| Mark | Material | |
| D | Carbon |
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| N | Metal film |
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| S | Oxide metal film |
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| C | Solid |
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| G | Metal glaze |
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| W | Wire wounding or cement |
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| H | Ceramic |
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| F | Fusible | |
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Tolerance table
| Mark | Tolerance | ||
| A |
| ±0.05 |
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| B |
| ±0.1 |
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| C |
| ±0.25 |
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| D |
| ±0.5 |
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| F |
| ±1 |
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| G |
| ±2 |
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| J |
| ±5 |
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| K |
| ±10 |
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| M |
| ±20 |
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| P | +5 |
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| Z | used in 0 ohm |
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Material table
| Mark | Material | |
| E | Electrolytic | |
| P | Electrolytic |
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| C | Ceramic (temperature compensation) |
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| K | Ceramic |
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| F | Polyester |
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| N | Polypropylene |
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| M | Metalized polypropylene |
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| H | Metalized polypromylar |
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| B | Ceramic (semiconductor) |
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| G | Metalized polyestel |
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| Y | Composite film |
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| S | Styrol |
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| T | Tantalum oxide solid electrolytic |
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| U | Organic semiconductive electrolyte |
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| D | Electric double layer electrolytic |
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Tolerance table
| Mark | Tolerance | ||
| A | not specified | ||
| B | ±0.1 |
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| C | ±0.25 |
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| D | ±0.5 |
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| F | ±1 |
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| G | ±2 |
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| E | ±2.5 |
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| H | ±3 |
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| J | ±5 |
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| K | ± 0 |
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| M | ±20 |
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| N | ±30 |
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| P | +100 |
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| Q | +30 |
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| T | +50 |
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| U | +75 |
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| V | +20 |
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| W | +100 |
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| X | +40 |
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| Y | +150 |
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| Z | +80 |
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| Diode/Transistor Type Reading | ||||
Diode |
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Mark | Type number |
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R | 1S2076A,1S2473,1N4148 |
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AA | 1S2076A,1S2473,1SS133,1N4148 |
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Transistor |
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(1) NPN type |
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Mark |
| Type number |
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2SC536 | 2SC945A | 2SC1815 | 2SC1740S |
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AD | NF, NG | PA, QA | Y, GR | Q, R, S |
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AE | NF, NG | PA, QA, RA | O, Y, GR | Q, R, S |
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(2) PNP type |
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Coil Reading
Example L2 C1 4R7 K N
Tolerance |
Inductance value |
Manufacture code |
Unique code |
| Mark | Tolerance (nH) | Mark | Tolerance (%) | |
| C | ±0.25 | G | ±2 |
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| D | ±0.5 | J | ±5 |
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| S | ±0.3 | K | ±10 |
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| A | ±0.2 | L | ±15 |
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| M | ±20 |
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Mark |
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| Type number |
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2SA608 | 2SA564A |
| 2SA1015 | 2SA933S |
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AB | NF | R |
| Y, GR | R |
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AC | NF | Q, R |
| O, Y, GR | Q, R |
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(3) Chip type |
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Mark |
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| Type number |
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2SA1179/N | 2SA1037K |
| 2SA1037AK | 2SC2812/N | 2SC2412K | |
AJ | M6, M7 | R, S |
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AH |
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| L6, L7 | R, S |
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A2