TM-800 SERVICE MANUAL
Model RX/TX 1 ( FC ) 2 (F L ) 3 (FH ) 4 5 6 7 8
0
（
V
）
RX(MHz)
155.15 136.15
173.85
145.55
164.55
155.00
155.20
155.40
TX(MHz)
155.00 136.00 174.00
145.50
164.50 155.00 155.20 155.40
1
（
U1
）
RX(MHz)
481.15 450.15
511.85
465.55
496.55
481.00 481.20 481.40
TX(MHz)
481.00 450.00 512.00
465.50
496.50 481.00 481.20 481.40
2
（
U2
）
RX(MHz)
375.15 350.15 399.85
362.55
387.55 375.00 375.20 375.40
TX(MHz)
375.00 350.00 400.00
362.50
387.50 375.00 375.20 375.40
3
（
U3
）
RX(MHz)
435.15 400.15 469.85
417.55
452.55 435.00 435.20 435.40
TX(MHz)
435.00 400.00 470.00
417.50
452.50 435.00 435.20 435.40
4
（
U4
）
RX(MHz)
465.15 440.15 489.85
452.55
477.55 465.00 465.20 465.40
TX(MHz)
465.00 440.00 490.00
452.50
477.50 465.00 465.20 465.40
5
（
U5
）
RX(MHz)
503.15 480.15 525.85
491.75
515.25 503.00 503.20 503.40
TX(MHz)
503.00 480.00 526.00
491.70
515.20 503.00 503.20 503.40
6
（
U6
）
RX(MHz)
425.15 400.15 449.85
412.55
437.55 425.00 425.20 425.40
TX(MHz)
425.00 400.00 450.00
412.50
437.50 425.00 425.20 425.40
VCO
Item Condition
Measurement Adjustment Specification /
Remarks
Test Instrument Terminal Part Method
1. Power supply
1.Power supply
voltage DC13.6V
Note:
1. This radio may be installed in negative
ground electrical systems only. Reverse polarity
will cause the cable fuse to blow. Check the
vehicle ground po
larity before installation to
prevent wasted time and effort.
2. If DC power is to be controlled by the vehicle ignition switch, a switching relay
should be used to switch the positive power lead. The vehicle ignition switch
then controls DC to the relay coil.
2. VCO lock voltage
(TX)
1.CH: TX HI
Digital Voltmeter
CV
TC1
7.1V±0.1V
2.CH: TX LO Check
＞
1.8V
3. VCO lock voltage
(RX)
1.CH: RX HI
TC2
7.1V±0.1V
2.CH: RX LO Check
＞
1.8V
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