Kirisun PT4200, Руководство по обслуживанию

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6
PT4200 SERVICE MANUAL
3.4 Semiconductor Function Description
IC1 MB15E03 Frequenc y synthesizer
IC4 NJM2904 APC Voltag e comparison , driv e
IC5 MC3361 Receiver' s 2n d loca l oscillation , 2n d I F
amp lificati on, amplitude limit,
demodulation, noise amplification
IC6 NJM2902 Receive r demodulatio n signa l
am plification, filtering
IC7 NJM2902 MIC amplification , amplitud e limi t, filterin g
IC8 KIA6278F
Receive r audi o amplifie r
IC9 AT24C08 E2PROM , memor y channe l frequenc y data ,
function setting parameter,
Debugging state parameters
MCU
IC10 M38034
IC11 PST9140NR MCU rese t circu it
IC12 HT7150-1 Lo w voltag e differenc e, lo w powe r
consumption, and regulator
IC15 W588A080 Voic e storag e I C
Q2 2SC5108 Transmitt er 1 st amplification
Q3 2SC3356 Transmitt er 2n d amplificatio n
Q4 2SC5108 VC O bufferin g amplifi er
Q5 2SC5108 VC O bufferin g amplifi er
Q6 2SC4617 VC O pow er filter
Q7 2SC4738 Nois e amplifier
Q9 2SC4617 Receiv er aud io signa ls amplification
Q10 2SC1623 5 V regulate d outp ut curre nt stretch er
Q11 RD07MVS1 Transmitter fina l pow er amp lifier
Q12 RD01MUS1 Transmitter pow er amp lifier driv e
Q17 DTA144EE AP C outp ut switc h
Q19 3SK318 Th e 1 st frequenc y mix er
Q20 3SK318 Receiv er H F amplifi er
Q21 KTC4082 Th e 1 st IF amplifier
Q22 DTC144EE Re d LE D driv e
Q23 DTC144EE Gree n LE D drive
Q24 2SK1824 Voic e indicatio n switch
Q26 DTC144EE 5 C switc h
Q29 KTA1298 5 T switc h
Q30 KTA1298 5 V regulate d outp ut curre nt stretch er
Q31 KTA1298 5 R switc h
Q32 KTA1298 5 C switc h
Q34 DTA144EE Pow er switc h of M IC amplificatio n un it
Q35 2SK1824 Aud io outp ut switc h of receiver.
Cut off when in emergency alert state.
Q36 2SK1824 Receive r aud io outp ut switc h
Table 3.5 Diode Function Description
D1 MA77 Trans mitter an tenna s witch diode
D2 MA77 Trans mitter an tenna s witch diode
D3 HSC277 VCO output switch
D4 HSC277 Antenna switch
D5 HSC277 Antenna switch
D6 HSC277 VCO output switch
D7 HSC277 5V regulated output current stretcher
D8 HVC376B VCO oscillation variable capacitance diode
D9 HVC376B VCO oscillation variable capacitance diode
D12 MA360 VCO modulation diode
D14 HZU5ALL APC output voltage-limiting diode
D15 MA2S111 Loss of lock check diode
D16 MA2S111 VCO power filtering accelerating diode
D17 1N4148 Noise detector
D18 1N4148 Noise detector
D20 LED Green Receiving indication
D25 MA2S111 APC individual diode
D28 LED Red Transmitting indication
D29 LED Green Receiving Indication
61 BUSY_V P61 I Voice indication of circuit busy check
62 DATA_V P62 I/O Voice indication data
63 SCLK_V P63 I/O Voice indication clock
64 NC Not used
P64 I
Table3.6 XF1 XF2 Crystal Filter Features
Item Specified Value
Nominal center frequency 49.95MHz
Transmission bandwidth 7.5kHz or bigger within 3dB
40dB Barrage bandwidth 20.0kHz or smaller
Pulse 1.0dB or smaller
Insertion loss 3.0dB or smaller
Guarantee attenuation 80dB or bigger within fo-910kHz
Terminal resistance ---
Table 3.7 CF1 LTVPC450EB Features
Item Specified Value
Nominal center frequency 450kHz
6Db bandwidth 3.5kHz or bigger
50dB bandwidth 12.5kHz or smaller
Pulse 2.0dB or smaller within f0 4kHz
Insertion loss 6.0dB or smaller
Guarantee attenuation 35.0dB or bigger within f0 100kHz
Terminal resistance 2.0k
Posi
Type Function Description
Posi
tion
Type Function Description