Kenwood NX-5800 Service Manual page 130

LEVEL DIAGRAM
Receiver section
5
RF (Center Frequency)
- 120dBm - 121dBm - 123dBm
D310
ANT D311
D312
C372 D313 C562
ANT
LPF BPF
4
Transmitter section
3
AF (1kHz)
5mVrms
IC902
2
SSI
MIC
CODEC
1
A B
- 111dBm - 110dBm
C549 Q502 C545 C522 IC500 C500 XF600 C663 Q604 C658 Q603 C653
BPF BPF
RF AMP MCF
RX VCO/ PLL
To make measurements in the AF section, connect the AC level meter.
(ANT input: -53dBm, 1kHz FM, 1.5kHz DEV (Narrow). SP output: 4W@4ohm Load)
In the RF section, use 470pF coupling capacitor.
(The display shows the SSG input value required to obtain 12dB SINAD.)
AF
(1kHz)
f1:115.2mVrms
f1:0dBm
f2,f3:139.3mVrms f2,f3:2.8dBm
IC706 IC902
C150 Q107 C185
SSI
VCO Coupler
CODEC
To PLL IC
C
(No.RA017<Rev.003>) 2-12
1st IF (49.95MHz)
- 117dBm -113.5dBm - 106dBm
IF IC
IF AMP IF AMP IC600
RF (Center Frequency)
4 dBm 15dBm 17dBm
L134
L135 C304 IC300 C312 Q300 C334 IC302
Pre-
Drive
Drive
f1: F,K (Center frequency: 485MHz)
f2: F2,K2 (Center frequency : 425MHz)
f3: E (Center frequency : 435MHz)
D E
2-12 (No.RA017<Rev.003>)
AF (1kHz)
141mVrms
IC706 IC902 C927 IC903
SSI
CODEC
C944 IC911 C969
28.8mVrms
f1,f2:47.7dBm f1,f2:45W
f3:45dBm f3:25W
f1,f2:47.5dBm
f3:44.8dBm
ANT
C350 C372
Final ANT LPF
F
116 mVrms
IC713
VOL
G