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Kenwood VT-181, Руководство по обслуживанию

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AC VOLTMETER

VT-181/VT-181E

SERVICE MANUAL

KENWOOD TMI CORPORATION

© 1998-4/B51-1132-00 (K/K)

HANDLE

: (K01-0564-08)

HANDLE COVER : (B09-0410-08)

FRONT PANEL
VT-181

: (A63-0301-08)

VT-181E : (A63-0316-08)

SIDE FRAME
(A13-2254-08)

PUSH KNOB
(K24-3015-08)

KNOB
(K21-0959-08)

RORARY KNOB
(K21-0961-08)

RUBBER FOOT
(J02-0543-08)

VT-181/VT-181E(K) 

INT 

 

98.4.9 

10:26 

AM 

 y [ W  

2

Содержание VT-181

Страница 1: ... 1998 4 B51 1132 00 K K HANDLE K01 0564 08 HANDLE COVER B09 0410 08 FRONT PANEL VT 181 A63 0301 08 VT 181E A63 0316 08 SIDE FRAME A13 2254 08 PUSH KNOB K24 3015 08 KNOB K21 0959 08 RORARY KNOB K21 0961 08 RUBBER FOOT J02 0543 08 VT 181 VT 181E K INT98 4 910 26AM y W 2 ...

Страница 2: ...t perform any servicing other than contained in the operating instructions unless you are qualified to do so WARNING CONTENTS SPECIFICATIONS 3 SAFETY 4 CIRCUIT DESCRIPTION 5 BLOCK DIAGRAM 6 ADJUSTMENT 7 PARTS LIST 9 PARTS LIST ELECTRICAL 10 SCHEMATIC DIAGRAM 15 P C BOARD 21 VT 181 VT 181E K INT98 4 910 26AM y W 3 ...

Страница 3: ...V full scale 90 to 40dB 0dB 1V 90 to 42dBm 0dBm 1mW at 600Ω 500V DC AC peak 1V to 300mV range 100V DC AC peak 0 3mV to 300mV range Less than 1 at full scale Rated by signal noise ratio in 0 3mV 1mV and 1V ranges Over 30dB at 0 3mV range Power Supply Section Meter Section VT 181E VT 181 Item Environmental Indoor Use Only Altitude up to 2000m OVERVOLTAGE CATEGORY POLLUTION DEGREE2 Amplifier Section ...

Страница 4: ...oper fuse is installed by replacing the line fuse Voltage conversion This instrument may be operated from either a 100 to 230V 50 60Hz power source Use the following procedure to change from 100 to 230V operation or vice verse 1 Remove the fuse holder 2 Replace fuse F1 with a fuse of appropriate value 3 Reinsert it for appropriate voltage range 4 When performing the reinsertion of fuse holder for ...

Страница 5: ...ps by FET switch 0dB 10dB 20dB and 30dB 5 Main Amplifier A wideband non inverting differential amplifier act as the main amplifier Which has high input impedance low output impedance and 20 fold gain This output signal level is 20mVrms for the fullscale read on the Meter 6 Output Amplifier A wideband non inverting differential amplifier act as a out put amplifier Which has 50 fold gain and 600Ω ou...

Страница 6: ...E REF METER DC5V GND DC 5V POWER ON OFF IMPEDANCE CONVERTER MAIN AMP OUTPUT AMP ABSOLUTE MEAN VALUE DET AC 100V 120V 220V 230V 50 60Hz 1st ATT 2nd ATT 3rd ATT GAIN CONTROL ATT CONTROL ROTARY SW POWER TRANSFORMER POWER SUPPLY VT 181 VT 181E K INT 98 4 9 10 31 AM y W 11 ...

Страница 7: ...rate measuring instrument and an insulated adjusting flat blade screwdriver If they are not available contact your dealer For optimum adjustment turn the power on and warm up the scope suffi ciently more than 30 minutes before starting Before calibrating the unit check the power supply voltage TEST EQUIPMENT REQUIRED The following instrument or their equivalent should be used for making adjustment...

Страница 8: ...t be deformed VT 181 VT 181E 8 ADJUSTMENT ITEM 100 kHz TC101 frequency RANGE 1V characteristics 1 Input a 1kHz or 400 Hz 1 Vrms sine wave and adjust the oscillator output so that the pointer of the set points at 9 0 2 Adjust the TC so that the pointer points at 9 0 when the frequency is changed to 100 kHz while the oscillator output remains unchanged PROCEDURE ADJUSTMENT POINT 0 3 10 Scale 9 Scale...

Страница 9: ...N UNIT W02 2368 08 PANEL UNIT W02 2365 08 RANGE UNIT W01 0522 08 ACCESSORIES 1 New Parts Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert Ref No Add ress Description Parts No L Scandinavia K USA P Canada R Mexico Y PX Far East Hawaii T Europe E Europe G Germany Y AAFES Europe X Australia M Other Area...

Страница 10: ...CC45FCH1H070D CAP CERAMIC 7P 50 D C147 CQ92FM1H103J CAP PLASTIC 0 01U 50 J C148 CC45FCH1H100J CAP CERAMIC 10P 50 J C150 CQ92BP1H122K CAP PLASTIC 1200P 50 K C152 CE04EW1A471Z CAP ELECTRO 470U 10 Z C153 CC45FCH1H010C CAP CERAMIC 1P 50 C D101 1N4148 DIODE D102 1N4148 DIODE D103 1N4148 DIODE D106 1N4148 DIODE D107 1N4148 DIODE D108 1N4148 DIODE D109 1N4148 DIODE D110 1N4148 DIODE 1 New Parts Parts wit...

Страница 11: ... No L Scandinavia K USA P Canada R Mexico Y PX Far East Hawaii T Europe E Europe G Germany Y AAFES Europe X Australia M Other Areas indicates safety critical components R128 RD14BB2B114J RES CARBON FILM 110K 0 125 R129 RD14BB2B114J RES CARBON FILM 110K 0 125 R130 RD14BB2B114J RES CARBON FILM 110K 0 125 R131 RD14BB2B114J RES CARBON FILM 110K 0 125 R132 RD14BB2B114J RES CARBON FILM 110K 0 125 R133 R...

Страница 12: ... 50V C140 CC45FCH2H222K CAP CERAMIC 2200P K 500V C141 CF93AN2E104K CAP METALIZED 0 1U K 250V C142 CC45FCH1H120J CAP CERAMIC 12P J 50V C143 CC45FCH1H070D CAP CERAMIC 7P D 50V C147 CQ92FM1H103J CAP PLASTIC 0 01U J 50V C148 CC45FCH1H100J CAP CERAMIC 10P J 50V C150 CQ92BP1H122K CAP PLASTIC 1200P K 50V C152 CE04EW1A471Z CAP ELECTRO 470U Z 10V C153 CC45FCH1H010C CAP CERAMIC 1P C 50V D101 1N4148 DIODE D1...

Страница 13: ...Europe E Europe G Germany Y AAFES Europe X Australia M Other Areas indicates safety critical components R123 RD14BB2B472J RES CARBON FILM 4 7K J 1 8W R124 RD14BB2B472J RES CARBON FILM 4 7K J 1 8W R125 RD14BB2B472J RES CARBON FILM 4 7K J 1 8W R126 RD14BB2B114J RES CARBON FILM 110K J 1 8W R127 RD14BB2B114J RES CARBON FILM 110K J 1 8W R128 RD14BB2B114J RES CARBON FILM 110K J 1 8W R129 RD14BB2B114J RE...

Страница 14: ...W R186 RD14BB2B161J RES CARBON FILM 160 J 1 8W TC101 C05 0707 08 CAP TRIMMER U101 MC14066BCP IC QUAD ANALOG SWITCH MPX U102 LM7805 IC FIXED VOLTAGE REGULATOR U103 LM7905 IC FIXED VOLTAGE REGULATOR VR101 R12 1545 05 RES SEMI FIXED 1K 1 10W VR102 R12 0575 05 RES SEMI FIXED 100 1 10W J73 0540 08 PCB UNMOUNTED E40 7609 08 CONNECTOR 4P S60 0628 08 ROTARY SWITCH S101 J73 0540 08 PCB UNMOUNTED E40 7609 0...

Страница 15: ...A C E B D 2 1 3 5 7 4 6 VT 181 SCHEMATIC DIAGRAM VT 181 VT 181E K INT 98 4 9 10 31 AM y W 16 ...

Страница 16: ...F G I H J 2 1 3 5 7 4 6 VT 181E SCHEMATIC DIAGRAM VT 181 VT 181E K INT 98 4 9 10 31 AM y W 13 ...

Страница 17: ...K M O L N 2 1 3 5 7 4 6 VT 181 SCHEMATIC DIAGRAM VT 181 VT 181E K INT 98 4 9 10 31 AM y W 12 ...

Страница 18: ...P Q S R T 2 1 3 5 7 4 6 VT 181E SCHEMATIC DIAGRAM VT 181 VT 181E K INT 98 4 9 10 31 AM y W 9 ...

Страница 19: ...U W Y V X 2 1 3 5 7 4 6 VT181 VT181E VT 181 VT 181E K INT98 4 910 31AM y W 8 ...

Страница 20: ...Z AA AC AB AD 2 1 3 5 7 4 6 VT 181 VT 181E K INT98 4 910 31AM y W 5 ...

Страница 21: ...5 7 4 6 Refer to the schematic diagram for the values of resistors and capacitors MAIN UNIT W02 2355 08 W02 2356 08 RANGE UNIT W02 2365 08 W02 2366 08 Pattern side view PANEL UNIT W02 2368 08 Pattern side view VT 181 VT 181E K INT98 4 910 31AM y W 4 ...

Страница 22: ...VT 181 VT 181E A product of KENWOOD TMI CORPORATION 1 16 2 Hakusan Midori ku Yokohama City 226 Japan VT 181 VT 181E K INT98 4 910 26AM y W 1 ...

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