TK-260G/270G
DESCRIPTION OF COMPONENTS
DISPLAY UNIT (X54-3250-10) (TK-270G Only)
Ref. No. | Use/Function | Operation/Condition | |
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IC501 | IC | LCD driver |
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Q501 | Transistor | Current driver | / LCD back light LED AVR |
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Q502 | Transistor | DC switch |
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D505 | Diode | Speed up |
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D506 | LED | LCD back light |
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D507 | Diode | Voltage reference | |
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D508~510 | LED | LED | /Key pad back light |
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D511 | LED | LCD back light |
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D512~516 | LED | LED | /Key pad back light |
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TX-RX UNIT (X57-587X-XX)
Ref. No. | Use/Function | Operation/Condition | |
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IC1 | IC | RF Power Module |
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IC2 | IC | PLL system |
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IC3 | IC | Comparator (APC) |
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IC4 | IC | FM IF system |
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IC5,6 | IC | Shift register | / Output expander |
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IC7 | IC | Voltage regulator | / 5V |
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IC8 | IC | Voltage detector | / Reset |
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IC9 | IC | Voltage detector | / INT |
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IC10 | IC | EEPROM |
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IC11 | IC | AF Power amplifier |
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IC12 | IC | Flash memory |
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IC13 | IC | Microprocessor |
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IC14 | IC | Audio processor |
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IC15(1/2) | IC | 2Tone amplifier |
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IC15(2/2) | IC | AF Pre amplifier |
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IC16(1/2) | IC | Bias buffer |
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IC16(2/2) | IC | AF Buffer amplifier |
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IC17 | IC | D/A converter (TX AF adjustment) | |
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IC18 | IC | DTMF decoder |
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IC19 | IC | Active filter | / For LSD in |
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IC301 | IC | VCO 1/2 divider |
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Q1 | Transistor | PLL IC fin amplifier |
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Q2 | Transistor | VCO oscillation (TX) |
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Q3 | Transistor | RF Buffer amplifier |
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Q4 | Transistor | RF amplifier |
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Q6 | Transistor | RF amplifier | / TX driver |
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Q7 | FET | DC switch |
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Q8,Q9 | Transistor | DC switch |
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Q10 | FET | VCO oscillation (RX) |
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Q11 | Transistor | Ripple filter |
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Q12 | Transistor | Tripler |
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Q13 | Transistor | DC switch |
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Q14 | Transistor | 2nd IF W/N switch sets to on when Narrow | |
Q15 | Transistor | DC switch |
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Q16 | Transistor | DC switch | / 5R |
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Q17 | Transistor | 2nd IF W/N switch sets to on when Wide | |
Q18 | Transistor | DC switch | / 5T, Save |
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Q19 | FET | Mixer |
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Q20,Q21 | Transistor | DC switch | / 5T, Save |
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Q22 | Transistor | IF amplifier |
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Ref. No. | Use/Function | Operation/Condition | |
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Q23 | Transistor | DC switch | / W/N audio amplitude adjust |
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Q24 | Transistor | DC switch | / LED (Red) |
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Q25 | Transistor | DC Switch | / LED (Green) |
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Q26 | Transistor | DC switch | / Squelch |
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Q27 | FET | DC switch | / 5T, Save |
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Q28 | Transistor | DC switch | / 5M |
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Q30 | FET | SP Mute switch |
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Q31 | Transistor | Clock frequency shift | |
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Q32~34 | Transistor | DC switch | / SP Mute |
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Q35(1/2) | FET | Mute switch | / MIC line mute |
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Q35(2/2) | FET | DC switch |
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Q36 | FET | Mute switch |
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Q301 | FET | RF amplifier |
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D1 | Diode | Unlock detect |
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D2 | Variable | Frequency control | |
capacitance diode | |||
D3 | Diode | ANT switch |
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D4 | Variable | Frequency control | |
capacitance diode | |||
D5 | Diode | TX/RX switch |
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D6 | Variable | TX modulation |
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capacitance diode |
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D7 | Diode | ANT switch |
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D8 | Zener Diode | Overload protection | |
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D9 | Variable | Frequency control | |
capacitance diode | |||
D10 | Diode | ANT switch |
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D11 | Variable | Frequency control | |
capacitance diode | |||
D12 | Diode | Current steering |
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D13,14 | Diode | RF switch (2nd IF wide/narrow) | |
D15 | Diode | Reverse protection | |
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D17 | Diode | Model check |
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D18 | LED | LED/ Red, Green |
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D19 | Diode | Model check |
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D21 | Diode | Voltage drop |
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D22 | Diode | Reverse protection | |
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D23 | Diode | Voltage clamp |
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D302,303,305 | Variable | Rf BPF turnig |
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capacitance diode |
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