FP520 Service Manual
Page 23 of 64
40
7MHS-4083-01A-W
PTT button metal dome
1
φ6mm,SUS301 square metal dome
41
6PD7-4083-HPA
PTT PCB
1
42
6PM7-4085-HMB(VHF)
6PM7-4083-HMB(UHF)
main PCB
1
1.2mm thickness
43
7MHS-7042-01B-W
latch spring2
1
stainless steel (SUS301),0.25THK
44
7MHS-7042-01A-W
latch spring1
1
stainless steel(SUS301),0.25THK
45
7MHP-7042-14A-W0
battery latch
1
POM,black
46
7MHX-7042-02B-Z
battery hook 2
1
zinc alloy(Zn3#), eletrophoresis, black
47
7MHX-7042-02A-Z
battery hook 1
1
zinc alloy (Zn3#), electrophoresis, black
Chapter 6 Adjustment
6.1 Method of Adjustment
During the service,
a proper test and adjustment to the radio’s technical criteria is necessary after changing the
components.
6.1.1 Components Needed for the Adjustment
(
1
)
antenna interface convertor
(
2
)
universal interface
6.1.2 Manual Mode Adjustment
(
1
)
The radio needs 5 frequency adjustment.
The frequency for the five digital keys is as follows:
Model
Digital key 1
Digital key 2
Digital key 3
Digital key 4
Digital key 5
FP520 (VHF)
136.05MHz
145.55MHz
155.05MHz
164.55MHz
173.95MHz
FP520 (UHF)
400.05MHz
415.05MHz
435.05MHz
455.05MH
469.975MHz
6.1.3 Computer Adjustment Method:
A. VCO
The radio is receiving,
a) The channel is on the receiving high frequency, adjust C335 and test T300, the spot voltage is 3.6 ± 0.1V.
b) The channel is on the receiving low frequency, test T300, the spot voltage
>
0.6V
The radio is transmitting
:
a) The channel is on the transmitting high frequency, adjust C371 test T300, spot voltage as 3.6±0.1V
d) The channel is on the transmitting low frequency, test T300, the spot voltage
>
0.6V
B. TX Part
1). Transmitting Frequency
Under the computer mode, the transmitting frequency is adjusted within ±100Hz.
2). Power
a. Under the computer mode (transmitting high power) (test in 5 frequency points), the transmitting high power is
adjusted to 3.8-4.2W.
b. Under the computer mode (transmitting low power) (test in 5 frequency points), the transmitting low power is
Summary of Contents for FP520
Page 1: ... 键入文档副标题 gh 选取日期 在此处键入文档的摘要 摘要通常是对文档内容的简短总结 在此处键入文档的摘要 摘要 通常是对文档内容的简短总结 ...
Page 44: ...FP520 Service Manual Page 43 of 64 Figure 1 FP520 01 Mainboard Schematic Diagram 136 174MHz ...
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Page 54: ...FP520 Service Manual Page 53 of 64 Figure 4 FP520 02 Mainboard Schematic Diagram 400 470MHz ...
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Page 64: ...FP520 Service Manual Page 63 of 64 Figure 7 KBC 51 7 4V Electrical Schematic Diagram ...