Parts List - Kenwood FG-273 Service Manual

ADJUSTMENT
1 M RANGE FREQUENCY ADJUSTMENT
SINE WAVE AMPLITUDE ADJUSTMENT
1.
2.
3.
4.
Push function switch to ''SINE WAVE".
Push range switch to 100 kHz, dial scale setting at 1.0
position.
Load 50 ohms, ATT switch OFF, amplitude VR MAX.
Adjust R75 (sine wave output amplitude) to get
10.4+0.1 Vp-p level from main output and make sure
the waveform do not clip on the top and bottom.
SINE WAVE, FREQUENCY RESPONSE AD-
2
1.
2
3.
4
5
JUSTMENT
Push function switch to ''SINE WAVE",
. Push range switch to 1 M, amplitude VR MAX.
Turn the frequency dial to 2.0 position approximately.
. Load 50 ohms, ATT switch OFF.
. Adjust C23 (sine wave response) to get 10.4+0.1 Vp-p
level from main output and make sure the signal are not
clipping.
SINE WAVE DISTORTION ADJUSTMENT
Set sweep width VR, rate VR, duty VR, offset VR to mini-
mum situation. Offset VR press in to internal offset position.
1.
2.
3.
4.
oi
oan Om
10.
11.
12.
Push function switch to 'SINE WAVE".
Push range switch to 100 kHz.
Tuning frequency dial to 0.2 position.
Adjust R35 make potential equal (within + 10 mV) be-
tween QO5 gate and pin 10 of U5.
. Adjust R11, R19 make DC voltage equal between pin
2 and pin 3 of both U1 and U2.
. Push range switch to 100 Hz, adjust R45 CW to MAX.
. Adjust R48 to reduce 20 Hz distortion.
. Readjust R45 to reduce 20 Hz distortion.
. Repeat step 7 and 8 to minimize 20 Hz distortion for
less than 0.8%.
Push range switch to 100 kHz, setting frequency dial
to 1.0 position.
Check distortion of 100 kHz for less than 0.8%.
Repeat step 7 to 8 for maintain distortion less than
0.8%.
FREQUENCY ACCURACY ADJUSTMENT
1.
2
3
4.
5
"Oo
Push function switch to triangle wave.
. Push range switch to 100 kHz, amplitude VR MAX.
. Tuning frequency VR to 2.0 position.
Adjust R7 for a counter display reading 200 kHz.
. Check all ranges accuracy and function are in full scale
+4.5%.
. Repeat steps 4 and 5.
. Tuning frequency VR to 0.2 position.
. Check al! function and frequency except MHz range fre-
quency accuracy are in full scale +4.5%.
. Repeat steps 3 to 7 to complete step 8.
Ooahwh —
7.
. Push function switch to triangle wave.
. Push range switch to 1 MHz, amplitude VR MAX.
. Tuning frequency VR to 2.0 position.
. Adjust C8 for a counter display reading 2 MHz.
. Tuning frequency VR to 0.2 position.
. Check all function frequency accuracy is in full scale
+4,5%.
Repeat steps 3 to 5 to complete step 6.
COUNTER SENSITIVITY ADJUSTMENT
1.
2.
3.
Push the counter INT/EXT switch to EXT mode, dial
scale setting at cw max.
Set range switch at 1 M range. amplitude VR max,
function switch setting at triangle.
. Adjust R159 to make reading ''.0'' with no signal in-
put to EXT counter input BNC jack.
. Check counter sensitivity by 10 MHz 30 mV RMS.
. Repeat step 3 and 4 to maintain both sensitivity spec
and repress interfere of signal generator circuit.
COUNTER ACCURACY ADJUSTMENT
1.
2.
Warm-up the instrument at feast thirty minutes.
Input 10 MHz 30 mVrms sine wave to EXT counter
BNC connector.
Push the range mode switch to 1 k range (gate time
1 s) adjust C43 SVC to 000.000 kHz (OVER LED lights
on simultaneously).
LOG SWEEP WIDTH ADJUSTMENT
1.
2.
3.
Pull rate controf VR and turn C.W.
Connect oscilloscope input to TP1.
Adjust R176 (470 ohm) to get +13.5/-—0.5 V log
wave form.
:
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PARTS LIST
MISCELLANEOUS
REF.NO PARTS NO NAME & DESCRIPTION
802-0S522-08 TOP CASE
A02-0S23-08 BOTTOM CASE
A21-1132-08 DECORATIVE PANEL
A22-0869-08 SUB PANEL
A23-1686-08 REAR PANEL
B41-0800-08 CAUTION LABEL
BSO-7660-00 INSTRUCTION MANUAL (JAPANESE)
BS0-7664-00 INSTRUCTION MANUAL CENGLISH)
£02-0103-1S Ic SOCKET 14 PIN
€02-0139-05 Ic SOCKET 28 PIN
€04-0251-05 BNC RECEPTACLE
€18-0351-05 AC INLET 3 P
E22-0482-08 CONNECTOR 4PCSELECT VOLTAGE >
£30-1644-15 BS POWER CORD
€30-1818-05 JIS POWER CORD
E30-1819-05 CEE POWER CORD
€30-1821-0S SAA POWER CORD
E31-2931-08 WIRE ASS'Y 1P (FUSE TO PIN)
€31-2932-08 WIRE ASS'Y 3P (J1,.J4,.J5)
€31-2933-08 WIRE ASS'Y 2P ¢J3)
E31-2934-08 WIRE ASS'Y 2P ¢(J2)
E31-2940-08 SHIELD CABLE 110MM
E31-2942-08 SHIELD CABLE 130MM
£31-2943-08 SHIELD CABLE 170MM
E40-702S-08 PIN CONNECTOR 8P
E40-7026~08 PIN CONNECTOR 6P
&40-7029-08 PIN CONNECTOR 3P
E40-7030-08 PIN CONNECTOR 2P
FO02-0517-08 HEAT SINK 19X19X10H
F02-0S18-08 HEAT SINK H=15MM
FOS-2012-05 FUSE: 0.2ACFAST BLOW)
FOS-3017-05 FUSE 0.3A¢SLOW BLOW)
FO9-051S-04 SHEETCCOVERED ON CAUTION LABEL
F20-0670-08 INSULATED FIBER
F20-0671-08 INSULATOR FIBER 40X30X0.5T
G02-0612-08 COIL SPRING
G13-0724-08 SPONGE 20X40
G13-072S5-08 SPONGE 20X30X1T
G16-0615-08 SHIELD. PAPER
HO1-S88S5-08 CARTON BOX
H12-0571-08 FOAMED PAD
H20-1728-08 VIYNL COVER 320X340X0.06
J02-0520-08 RUBBER FOOTCFRONT)
J02-0521-08 RUBBER FOOTCREAR>
J13-0507-08 FUSE HOLDER
J2S-5246-08 PCB <UNMOUNTED) 169X220
J2S5-S247-08 PCB CUNMOUNTED) 160X37
J25-S248-08 PCB <UNMOUNTED> 86X37
J25-S281-08 PCB (UNMOUNTED) 23X63
J30-0622-08 TRANSISTOR HOLDER
J32-0882-08 HEX STUD . L=44.2
K01-0527-08 HANDLE
K23~-0810~-08 KNOB
K2?-0541-08 PUSH BUTTONCPOWER SWITCH)
K27-0542-08 PUSH BUTTON, WHITE
L01-9726-08 POWER TRANSFORMER
L7?-1035-08 CRYSTAL LOMHZ
NO9-0758-08 TAPPING SCREWCFRONT FOQT)3.SxX8
$40-1523-08 PUSH SWITCHCPOWER> TV-3
$42-0505-08 PUSH SWITCHCRANGE FUNCTION)
$42-2515~08 PUSH SWITCHCCQUNTER ATTENUATOR
WO2-0454-08 MAIN UNITCMOUNTED>
WO2-045S5-08. DISPLAY UNIT CMOUNTED>
WO2-0456-08 EXT VCF UNITCMOUNTED>
WO2-0457-08 ATT. UNITCMOUNTED>
SEMICONDUCTOR
REF.NO PARTS NO NAME & DESCRIPTION
0001 = 1N4148 OIGODE
0048 1N4148 OIQDE
0049 1N4747A DIGDE. ZENER 20V
DOSO 1N4148 DIODE
DOS1 B30-0959~-08 LED. RED
00S2 1N4148 DIODE
00S3 =1N4148 OIOQDE
830-09S9-08 LED. RED DOS4
(
R
EF.NO PARTS NO
D061
D062
D063
D064
0065
D066
DO6?
D068
DOé9
0070
D071
DO?2
D073
D074
D075
DO?76
DO??
D080
D081
D082
0083
G001
Q002
Q003
G004
Q00S
Q006
007
008
Q009
6010
oil
Q012
@013
G016
Gol?
8018
6019
Q020
6021
0022
0023
0024
g025
0026
Q027
8028
Q029
8055
Q0S6
Qos?
g0S8
90S9
6060
U001
U002
UO03
U004
YOOS
UO06
U00?
U008
U009
U010
UO11
UO12
U013
U014
UO1S
U016
1N4148
1N4148
1N4148
1N4148
1N4148
B30-0959-08
1N4148
1N4148
B30-0959-08
1N4148
1N4148
1N4148
1IN4148
YN4001
uN4001
1N4001
wN4001
1N4001
1N4001
RDS. 2E(B2)
IN4001
2S8C1815(GR)
2SA1015(GR)
28A1015(GR)
2SC1815(GR)
2NS48S
2SA1015¢GR)
2SA1015¢GR>
28C1674¢K)
2801674¢K)
2N3906
2801674¢K)
2N2219A
2N290SA
LM7815
TIP32B
BO0SOC
2N3906
2SC1815¢GR)
2SC1815¢GR)
2SA101S¢GR)
2SC181S¢GR>
LM?780S
2SA101S<¢GR)
2SA1015¢GR)
2SA101S5¢GR>
2N5485
235C1815¢GR)
B30-0960-08
830-0960-08
B30-0960-08
B30-0960-08
B30-0960-08
B30-0960-08
IUA741
UA741
UA308
UA308
CA3086
SN7420N
SN7426N
'CA3030
'UA741
'LM3S8
'LM358
\UA741
|ICM7216D
iMC14066
MC10116P
[UA741
DIDDE
DIODE
DIODE
DIODE
DIODE
LED. RED
DIQDE
DIODE
LED. RED
DIODE
DIODE
DIODE
DIGDE
DIODE
DIODE
DIODE
DIODE
DIODE
DIODE
DIODE, ZENER
DIODE
8.2V
TR. SI. NPN
TR. SI, PNP
TR. SI, PNP
TR. SI, NPN
FET, N-CHANNEL
TR. SI, PNP
TR. SI, PNP
TR. SI. NPN
TR. SI, NPN
TR, SI, PNP
TR. SI, NPN
TR. SI. NPN
TR. SI. PNP
IC, 3-TERMINAL POSIT. REGULATOR
TR. SI, PNP
TR.
TR, SI. PNP
TR. SI, NPN
TR: SI, NPN
TR. SI, PNP
TR. SI, NPN :
IC, 3-TERMINAL POSIT. REGULATOR
TR. SI, PNP
TR. SI, PNP
TR. SI, PNP
FET, N-CHANNEL
TR. SI. NPN
DISPLAY (ORANGE >
DISPLAY (ORANGE >
DISPLAY (GRANGE>
DISPLAY COR ANGE>
DISPLAY (ORANGE >
DISPLAY COR ANGE >
IC, OP AMP.
IC, OP AMP.
fc, OP AMP.
IC, OP AMP.
IC. NPN TRANSISTOR ARRAY
IC, DUAL 4-INPUT NAND GATE
IC, QUAD. Z-INPUT: NANO GATE
IC, OP AMP.
IC, OP AMP.
IC,' DUAL OP AMP.
IC, DUAL OP AMP.
IC. OP AMP. ;
IC:8-DIGIT FREG. COUNTER/TIMER
IC, QUAD, ANALOG SW/GQUAD. MPX:
IC, TRIPLE LINE RECEIVER
IC, OP AMP.