Kenwood TS-990S Service Manual page 177

Item Condition
9. Frequency Adjust by the method of 1) or 2).
1) Menu No. : 0 (14.2MHz,
USB)
Connect the frequency coun-
ter to the REF I/O (10MHz)
terminal.
2) Menu No. : 0 (14.2MHz,
USB)
Mode: CW
SSG f.: 14.2MHz
SSG output: -53dBm
(0.501mV)
Using a cable, connect the
between frequency counter
and EXT.SP1 terminal.
Adjust to 700 by the rotating
CW pitch knob.
Rotate the AF knob to a level
detectable by the frequency
counter.
10. FM discrimi- 1) Main display f.:
nator 29.200000MHz
Mode: FM
P.AMP: ON
AF output: 0.63V/8
SSG f.: 29.200MHz
SSG output: –53dBm
(0.501mV)
MOD: 1kHz
DEV: 3kHz
11. NB voltage 1) Menu No.: 5
P.AMP: ON
AGC: OFF
FIL/SEL(M): 15kHz
NB1: ON
SSG f.: 14.201MHz
SSG output: –60dBm (224µV)
2) Menu No.: 5
SSG f.: 14.201MHz
SSG output: –101dBm (2µV)
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
f. counter Rear REF I/O Front
panel (10MHz) panel
f. counter Rear EXT. Front
SSG panel SP1 panel
SSG RX CN1 RX
Oscillo- (A/2) EXT. (A/2)
scope Rear SP2
AF VM panel
Distortion
meter
DM.SP
Audio
analyzer
DVM RX CN1 RX
SSG (A/2) TP2 (A/2)
Oscillo-
scope
AF VM
DM.SP
Noise G.
TS-990S
Adjustment
Parts Method
[UP]/ Set the adjustment 10MHz±0.1Hz (9.9999999~
[+](F5) value within the 10.0000001MHz)
or limit of the specifi ed
[DOWN] frequency.
/[-](F4)
[UP]/ Set the adjustment 700Hz±0.17Hz
[+](F5) value within the
or limit of the specifi ed
[DOWN] frequency.
/[-](F4)
L103 Adjust the L103 to AF max.
get the AF maximum
output of 0.63V/ 8
ohms.
Check the distortion 2.3% or less
and the waveform is
a good sine wave.
L43 Voltage min.
L52
L56
Check 4.1V or less
Specifi cations/Remarks
177