UHF1 (400
‐
470 MHz)
Troubleshooting Flow Chart
35
6.5
Frequency Generation Unit (FGU)
VCO
Check
Replace U2009
and U2008
No
VCO oscillates
normally?[1]
Yes
Q8002 and Q8007
are normal?[2]
No
Check D8007, D8008,
D8009, D8010, D8013,
D8014, D8015, D8016
Check feedback
circuit
Crystal 19.2 MHz
oscillates normally?[7]
Check 19.2 MHz
Oscillator circuit
Check CPU data circuit
Replace Q8002 and
Q8007
Replace Q8002 and
Q8007
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
U2009(5V) and
U2008(3.3V)
voltages are normal?
Q8008(4.3V)
voltage is normal?
Yes
No
Replace Q8008
Q8002 and Q8007
are normal?[3]
Feedback signal for
U8001 is normal? [6]
TP8002 CV is
normal?[4]
No
PLL U8001 is
normal?[5]
Yes
Replace PLL
U8001
No
Check U8002 and U8003
Description of Normal Situations:
[1] Detect the oscillation frequency of RX TP6107 using a spectrum analyzer.
[2] Check whether Q8001 and Q8003 are turned on and output 3.6 V voltage.
Содержание MD652
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Страница 15: ...Exploded View and Packaging Guide UHF1 400 470 MHz 8 3 2 Packaging Guide...
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Страница 106: ...VHF1 136 174 MHz...
Страница 110: ...Product Controls VHF1 136 174 MHz 2 Bottom View No Part Name No Part Name 1 Label 3 Fan 2 Fan Cover...
Страница 116: ...Exploded View and Packaging Guide VHF1 136 174 MHz 8 3 2 Packaging Guide...
Страница 154: ...43 9 PCB View Front Panel PCB View Top Layer...
Страница 155: ...44 Front Panel PCB View Bottom Layer...
Страница 156: ...45 Main Board PCB View Top Layer...
Страница 157: ...46 Main Board PCB View Bottom Layer...
Страница 207: ...1616300000360 11 2014 L07157 2014 Hytera Communications Corporation Limited Hytera Communications Corporation Limited...