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Leader LS 8105A Service Manual
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Leader LS 8105A Service Manual

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SERVICE MANUAL
LS 8105A
LS 8106A

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Summary of Contents for Leader LS 8105A

  • Page 1 SERVICE MANUAL LS 8105A LS 8106A...

  • Page 2: Table Of Contents

    LS 8105A/LS 8106A WARNING The following instructions are for use by qualified personnel only. To avoid electric shock, do not perform any servicing other than contained in the operating instructions unless you are qualified to do so. CONTENTS PANEL EXPLANATION ....................3 SPECIFICATIONS ......................5...

  • Page 3: Panel Explanation

    LS 8105A/LS 8106A PANEL EXPLANATION FILTER MODEL NO. PLATE PUSH KNOB LEVER MOLD PANEL KNOB (B11-0540-04) (B73-0283-04) (K27-3610-04) (K27-3627-14) (A63-0176-01) (K29-0881-04) DELAY POSITION TRIGGERING MODE 100MHz LS 8105A OSCILLOSCOPE H.MODE COUPLING COARSE FINE SOURCE MODE LEVEL VERT AUTO MODE –...
  • Page 4 DISCONNECT POWER SUPPLY BEFORE REPLACING FUSE. DO NOT REMOVE COVER. REFER SERVICING TO QUALIFIED PERSONNEL. SELECTOR ~LINE VOLTAGE FUSE 250V 100V T 1.0A 120V 220V T 400mA 230V LEADER ELECTRONICS CORP. MADE IN JAPAN RUBBER FOOT CORD WRAP (J02-0540-05) (W01-0503-04)

  • Page 5: Specifications

    LS 8105A/LS 8106A SPECIFICATIONS ITEMS LS 8105A LS 8106A Type 150 mm rectangular tube with an regulator Acceleration voltage Approx. 12 kV. Effective area 8 x 10 divisions (1 division = 10 mm) VERTICAL AXIS (Common to channels 1 and 2) Sensitivity 1mV, 2mV/div.: ±5%, 5mV to 5V/div.: ±2%...
  • Page 6 LS 8105A/LS 8106A SPECIFICATIONS ITEMS LS 8105A LS 8106A HOLDOFF Continuously variable from A sweep NORM position B sweep is continuously variable by ±4 division or more Trace separation with respect to A sweep. Continuous delay operation (AFTER DELAY) Delayed sweep operation...
  • Page 7 0 to 40˚C, 85% RH or less Storage -20 to 70˚C, 85% RH or less ACCESSORIES LP-102C : 10 MΩ ±2%, 12.5 pF ±10%, 1/10 [LS 8105A] Probe (2 each) LP-103C : 10 MΩ ±2%, 12.5 pF ±10%, 1/10 [LS 8106A] Instruction manual...
  • Page 8 LS 8105A/LS 8106A SPECIFICATIONS [The specifications shown below do not apply to the LS 8105A] ITEMS LS 8105A LS 8106A READOUT CH1 and CH2 scale factors (with probe detection), CH3 scale factor (with no probe detection.) Set value V-UNCAL, ADD, INV, A/B sweep scale factors (MAG converted. Marled with "*"...
  • Page 9 LS 8105A/LS 8106A SPECIFICATIONS ITEMS LS 8105A LS 8106A Vertical axis attenuators, sweep ranges, vertical positions and horizontal Auto set Positions of CH1 and CH2 are set automatically. Period 1.5 to 5 periods (H.VARI: In CAL mode, input signal: up to 10 MHz)

  • Page 10: Safety

    LS 8105A/LS 8106A SAFETY SAFETY Line fuse Before connecting the instrument to a power source, The fuse holder is located on the rear panel and contains carefully read the following information, then verify that the line fuse. Verify that the proper fuse is installed by the proper power cord is used and the proper line fuse is replacing the line fuse.

  • Page 11: Adjustment

    LS 8105A/LS 8106A ADJUSTMENT To obtain the best performance, periodically calibrate the PREPARATION FOR ADJUSTMENT unit. Sometimes, only one mode need be calibrated, while Control Settings at other times, all modes should be calibrated. When one The control settings listed below must be used for each mode is calibrated, it must be noted that the other modes adjustment procedure.
  • Page 12 LS 8105A/LS 8106A ADJUSTMENT Item Adjustment P.C.B. Procedure Operating voltage X73-2210 V.MODE : CH1, CH2 AC-DC : GND (both CH) VR306 X74-1640 VOLTS : 10mV (both CH) H.MODE : X-Y R/O : OFF 1) Move the spot to the CRT center by operating the POSI controls.
  • Page 13 LS 8105A/LS 8106A ADJUSTMENT Item Adjustment P.C.B. Procedure CH2 VARIABLE VR202 X73-2240 V.MODE : CH2 AC-DC : GND Balance VOLTS : 5mV H.MODE : A Adjust by setting VARIABLE to the MIN (fully counterclockwise) position with reference to the MAX (CAL) position.
  • Page 14 2) Measure the capacity of the 0.1V range. (20pF ±3pF) "LS 8105A" 3) At 0.5V adjust to obtain the same value as 0.1V. In the case of "LS 8105A" It is only 0.1V range, carry out a check of 20pF ± 3pF Iuminosity length...
  • Page 15 3 div Align the start with î 3 div the center. 4) "LS 8105A" is the same method as CH1, and unites DC coupling start with AC coupling start. CH3 TRIG DC VR303 X73-2240 V.MODE : CH3 SWEEP T : 0.2ms...
  • Page 16 LS 8105A/LS 8106A ADJUSTMENT Item Adjustment P.C.B. Procedure TRIG SIGNAL CH1: VR501 X73-2240 TRIG SOURCE: CH1, CH2 AC/DC: AC GAIN CH2: VR503 COUPLING: AC VOLTS: 10mV only with a P550 X74-1640 1) Input 1kHz and 6div. to the CH1. TRIG SOURCE: CH1 "LS 8106A"...
  • Page 17 LS 8105A/LS 8106A ADJUSTMENT Item Adjustment P.C.B. Procedure A/B sweep start VR105 X74-1640 V.MODE : CH1 SWEEP TIME : Aî1ms, Bî0.1ms points AC-DC : GND 1) Adjust VR105 so that the start points of A.SWEEP and B.SWEEP are aligned. Start point...
  • Page 18 LS 8105A/LS 8106A ADJUSTMENT Item Adjustment P.C.B. Procedure H.POSITION VR303 X74-1640 SWEEP TIME : Aî1ms H.MODE : A X-POSITION (H.POSI) 1) Set the AC-DC switch to GND. (The marker signal can be left input.) VR302 2) Set H.POSI to the 12:00 position.
  • Page 19 LS 8105A/LS 8106A ADJUSTMENT Item Adjustment P.C.B. Procedure CH1 1MHz X73-2210 V.MODE : CH1 VOLTS : 10mV square wave TC62 AC-DC : DC H.MODE : A TC106 X73-2240 1) Input 1MHz square wave to CH1 and set its amplitude to 5 div.

  • Page 20: Parts List

    Teile ohne Parts No. werden nicht geliefert. Ref. No Ref. No 8105A 8106A Parts No. Name & Description 8105A 8106A Parts No. Name & Description OVER ALL LS 8105A (Y70-2360-01)/LS 8106A (Y70-2340-01) J21-4853-04 BRACKET J21-4855-14 BRACKET J21-4999-04 BRACKET 150JKM31 J42-0558-05 BUSH J59-0403-05...

  • Page 21: Parts List (Electrical)

    ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 22 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 23 Teile ohne Parts No. werden nicht geliefert. Teile ohne Parts No. werden nicht geliefert. Ref. No Ref. No Parts No. Name & Description Parts No. Name & Description LS 8105A PANEL UNIT (X66-1560-00) RD14BB2C101J RES. CARBON 1/6W RD14BB2C102J RES. CARBON 1/6W RD14BB2C102J RES.
  • Page 24 Parts No. Name & Description POWER HIGH VOLTAGE UNIT C118 CE04LW1E221M CAP. ELECTRO 220u -20/80% C119 CK45FB1H472K CAP. CERAMIC 4700p LS 8105A (X68-1920-01)/LS 8106A (X68-1920-00) C120 CK45FB1H222K CAP. CERAMIC 2200p C121 CK45E3D102P CAP. CERAMIC 1000p 100/-0% 212-1511-05 THERMAL TUBE C125...
  • Page 25 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 26 8106A Name & Description 8105A 8106A Name & Description FINAL AMP UNIT D100 MA700 DIODE D101 MA700 DIODE LS 8105A (X73-2210-03)/LS 8106A (X73-2210-02) KMG01 E31-2170-05 JUMPING WIRE J201 E04-0277-05 RF COAXIAL CONNECTOR F01-2318-04 HEAT SINK F01-2367-05 HEAT SINK L40-1001-17 FERRI INDUCTOR...
  • Page 27 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 28 Teile ohne Parts No. werden nicht geliefert. Ref. No 8105A 8106A Parts No. Name & Description Ref. No 8105A 8106A Parts No. Name & Description VERTICAL UNIT LS 8105A (X73-2240-03)/LS 8106A (X73-2240-02) C154 CE04LW1C101M CAP. ELECTRO 100u -20/80% C155 CK73FB1H103K CAP. CHIP (2✽1.25) 0.01u C156 CE04LW1C470M CAP.
  • Page 29 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 30 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 31 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 32 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 33 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 34 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 35 Ref. No 8105A 8106A Parts No. Name & Description HORIZONTAL UNIT C118 CC73FSL1H102J CAP. CHIP (2✽1.25) 1000p C119 CE04LW1C470M CAP. ELECTRO LS 8105A (X74-1640-03)/LS 8106A (X74-1640-02) C120 CE04LW1C100M CAP. ELECTRO C121 CE04LW0J331M CAP. ELECTRO 330u 6.3V J73-0728-02 PCB (UNMOUNTED) C122 CC73FCH1H101J CAP.
  • Page 36 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 37 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 38 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 39 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 40 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 41 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 42 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 43 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. & Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 44 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 45 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 46 ✽ 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 Parts No. Name & Description R119 RK73FB2A162J RES. CHIP (2✽1.25) 1.6K 1/10W R120...
  • Page 47 LS 8105A OVER ALL X73-2240-03...
  • Page 48 LS 8106A OVER ALL (ROT COIL) PANEL VR UNIT WH17 ILLM VR CN900 X66-1550-00 FINAL AMP UNIT ILLM (150JKM31) +14. 8V X73-2210-02 C/4 -14. 8V +12V (CRT SOCKET) -12V Y- Y+ X- X+ 1Vp-p 1kHz CN18 WH31 DELAY LINE UNIT FINAL AMP UNIT X81-3270-00 X73-2210-02 A/4...

  • Page 49: Schematic Diagram

    SCHEMATIC DIAGRAM LS 8106A PANEL SWITCH UNIT (X66-1540-00) TV_V AUTO I C 2 I C 3 I C 4 AL T TV_H NORM GND1 V c c VERT SINGLE GND2 D 1 0 D 1 5 R 1 3 R 1 4 D 2 5 5 6 0 D 2 0...
  • Page 50 SCHEMATIC DIAGRAM LS 8106A (A/2) PANEL VR UNIT (X66-1550-00) 0.01U 2/ 2 NJ M4558L H - OF F T - S E P R27 24k : NJM4558L Q101,102 : 2SC1740S(R,S) R E F V 3 V 1 R 2 6 C N 2 0 2 0 k GN D...
  • Page 51 SCHEMATIC DIAGRAM LS 8105A PANEL UNIT (X66-1560-00) (A/3) : NJM4558L : 2SA933AS (R, S) Q101, 102 : 2SC1740S (R, S) (3) (B/3) (C/3)
  • Page 52 SCHEMATIC DIAGRAM LS 8105A/LS 8106A POWER SUPPLY UNIT (X68-1920-01: LS 8105A) (X68-1920-00: LS 8106A) R150 C150 R9,12 R150 W63,65,603 -00(LS 8106A) 18 3W 10 3W 51 1/6W -01(LS 8105A) 0.01u 100V USED USED USED 24 3W 47 1/6W 15K 1/4W...
  • Page 53 SCHEMATIC DIAGRAM LS 8105A/LS 8106A FINAL AMP UNIT (X73-2210-03: LS 8105A) (X73-2210-02: LS 8106A) 1000P 47 1W 1000PPM 390 2W 390 2W 390 2W 390 2W 0.47uH 1000PPM 47 1W 1/4W Q100 IC1, L3, 201 Q100 C15, 16 C201 C202, 203...
  • Page 54 SCHEMATIC DIAGRAM LS 8105A/LS 8106A VERTICAL UNIT (X73-2240-03 : LS 8105A) C301 C313 C315 CN26 CN30 D351 IC401 IC501, IC502 K351 Q351 R39-R42 R64 R301 R302 R303, R305 R304, R306 R344 R401, R403 -03 (LS 8105A) 100p USED USED USED USED 4.7K...
  • Page 55 SCHEMATIC DIAGRAM LS 8105A HORIZONTAL UNIT (X74-1640-03) 0.01...
  • Page 56 SCHEMATIC DIAGRAM LS 8106A HORIZONTAL UNIT (X74-1640-02) 0.01u 0.1u 0.1u 0.1u R433 240 2.4k C401 22u 25V 0.1u 2.2k 0.1u 100P 220u 100u 6.3V 0.1u 6.3V 0.1u 0.1u 0.1u 390k 0.1u 100u 0.1u 3.3k 4.7u 560k 100V 100V 6.3V 100V 100V 6.3V 100k...
  • Page 57 SCHEMATIC DIAGRAM LS 8106A (READ OUT UNIT (X77-2350-00)
  • Page 58 PC BOARD (Component side view) PANEL SW UNIT (X66-1540-00) PANEL VR UNIT (X66-1550-00 A/2) X66-1550-00 CN20 (B/2) X66-1550-00 PL103 PL102 PL101 Q101 R117 VR101 R116 VR102 Q102 R120 R113 VR105 VR104 R119 WH17 R105 Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 59 PC BOARD (Component side view) POWER & HIGH VOLTAGE UNIT (X68-1920-01) PANEL UNIT (X66-1560-00 A/3) Voltage (B/3) (C/3) Focus center and ASTIG Intensity Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 60 PC BOARD (Component side view) (B/4) FINAL AMP UNIT (X73-2210-0X A/4) CH1 1MHz Square wave CH1 Gain 10mV CH1 Gain 10mV POSI (C/4) J73-0285-42 C/4 L203 Gain R203 CH1 1MHz Square wave R217 C205 X80-1370-00 C/4 R216 X73-2210-00 C/4 (D/4) Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 61 PC BOARD (Component side view) PRE AMP UNIT (X73-2240-0X) Step ATT CH1 VARIABLE CH1 1MHz square wave CH1 center CH1 Gain CH1 Gain 1mV Balance Balance ADD POSI CH1 waveform shaping CH1 Input capacity TRIG Signal gain CH2 1MHz square wave CH2 Gain 10mV CH2 1MHz CH2 1MHz...
  • Page 62 PC BOARD (Component side view) HORIZONAL UNIT (X74-1640-0X A/2) CH1 TRIG AC A SWEEP 1ms Start A SWEEP 0.2µs coupling Stop Forcus center ASTIG Cursor POSI AC voltmeter Moving caracter Cursor X-Gain Operationg voltage DC voltmeter MAG GAIN MAG center X-POSI H.
  • Page 63 PC BOARD (Component side view) HORIZONAL UNIT (X74-1640-0X B/2) Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 64 PC BOARD (Component side view) READ OUT UNIT (X77-2350-00 A/2) READ OUT UNIT (X77-2350-00 B/2) Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 65 LS 8105A/LS 8106A PARTS DESCRIPTIONS...
  • Page 66 LS 8105A/LS 8106A LEADER ELECTRONICS CORP. May. 3. 2001 980401K Printed in Korea. •SUBSIDIARIES 2-6-33 Tsunashima-Higashi, Kohoku-ku, Yokohama 223-8505, Japan LEADER INSTRUMENTS ASIA PTE., LTD. PHONE : 81-45-541-2123 FAX : 81-45-541-2823 (SINGAPORE) PHONE : 65-298-2211 LEADER INSTRUMENTS (EUROPE) LTD. PHONE : 44-1628-788065 LEADER INSTRUMENTS (H.K.) LTD.

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Ls 8106a