iwatsu SS-7810-05-04_ServManl 电路图.pdf

Service Manual Oscilloscope SS-7810/05/04SS-7810/05/04 RadioFans.CN 收音机爱 好者资料库 0-1 Introduction Thank you very much for your purchase of Iwatsu electronic measuring instruments. Please adjust or calibrate your instrument after throughly reading this service manual and understanding its contents. After reading this manual, please keep it for future reference. Cautions for safe use Matters that must be observed for operation of this instrument and for prevention of injury to humans and damage to property are described as “ warnings” and “ cautions” in this service manual. Explanation of “ Warnings” and “ Cautions” coulmns in this manual Cautions Parts of the contents of this service manual may be modified without notice to accommodate improvements in performance and function. Reproduction of the contents of this service manual without previous consent is prohibited. History Jan. 2004 : Issue of the 1st edition KML045311A1-523150(B) Warning Caution Incorrect operation or failure to need warnings may result in death or serious injury. Incorrect operation or failure to need cautions may result in injury or damage to equipment. RadioFans.CN 收音机爱 好者资料库 0-2 Warnings Cautions Use care when servicing with power on: Dangerous voltages exist at several points in this product. To avoid personal injury, do not touch exposed connections or components while power is on. Disconnect power before removing protective panels, soldering, or replacing components. Never place a heavy substance on the power cord: It will cause an electric shock or fire. Prior to connecting or disconnecting the power cord, set the power supply to STBY: Its negligence will cause an electric shock or trouble. Use the specified AC power to operate the instrument: Use of non-specified power will cause an electric shock, fire, or trouble. The available AC power supplies are as follows: Supply voltage: 90 to 132V AC/180 to 250V AC Frequency: 48 to 440Hz Power consumption : Max. 110VA Use a 3-core power cord suitable to the supply voltage: Use of other cord will an electric shock or fire. When replacing a fuse, be sure to use our specified one (520mm, 250VA, 2A, slow): Use of other fuse will cause a fire or trouble. Do not place any substance near the air vent of this instrument or fan: It will cause a fire or trouble. Use the instrument within the specified operating range: Otherwise, it will cause a trouble. An available temperature range is as follows: Temperature: 0 to 40 Relative humidity: 90% RH(40) Do not apply an overvoltage to the input terminal: It will cause a trouble. A maximum allowable input voltage is as follows: CH1, CH2, CH3 (EXT): Directly : Max. 400V When the SS-087R (10:1) or SS-088 (1:1, 10:1) probe is used: At 10:1 : Max. 600V At 1:1: Max. 400V NOTE The maximum input voltage decreases depending on frequency and high voltage pulse of the input signal. RadioFans.CN 收音机爱 好者资料库 0-3 Table of Contents Introduction.0- 1 Caution for safe use .0- 1 Warnings .0- 2 Cautions .0- 2 Section 1 Specifications.1- 1 Section 2 Check and Adjustment 2.1Knowledge Required before Beginning Adjustment .2- 1 2.1.1Introduction .2- 1 2.1.2Check and Adjustment Intervals .2- 1 2.1.3Menu Screen .2- 1 Menu Tree SS-7810/05/04 .2- 2 Manual Adjustment Menu.2- 3 Menu Screen (f:MAN-ADJ, AUTO-ADJ, AUTO-CONF) .2- 4 Key Function/Movement in Adjustment Menu.2- 5 2.1.4Check and Adjustment Method.2- 6 Check/Adjustment Procedure Flow Chart SS-78* .2- 6 Automatic Adjustment Items.2- 7 Automatic Comfirmetion Items .2- 8 The Check/Adjustment Items and Sequence With Jig IE-1066 .2- 9 The Check/Adjustment Items and Sequence Without Jig IE-1066 .2-10 2.1.5Check and Adjustment Affected Item.2- 11 2.1.6Test Equipment Required .2-12 2.1.7Preparation for Check and Adjustment .2-14 2.1.8Connection the Adjustment Jig IE-1066 to the SS-78* .2-15 2.1.9Check and Adjustment Locations .2-16 POWER BOARD.2-16 ANA BOARD .2-17 ANA BOARD .2-18 HV BOARD .2-19 V MAIN BOARD (SS-7810).2-20 2.2DC Power Supply.2-21 2.3CRT Display.2-22 2.3.1CRT Cathode Voltage.2-22 2.3.2CRT Heater Voltage .2-22 2.3.3Focus .2-23 2.3.4Intensity .2-23 2.3.5Trace Rotation.2-24 2.3.6Orthogonality .2-25 2.4Check the Key Function in Automatic Confirmation Mode.2-26 2.5Gain (Coarse) .2-27 2.5.1Vertical Gain .2-27 2.5.2Horizontal Gain.2-28 2.5.3V Readout Gain .2-28 2.5.4t Readout Gain.2-29 2.6Crystal Oscillation Frequency.2-29 2.7Balance Coarse .2-30 2.7.1Balance Coarse (Automatic Adjustment Menu D, L) .2-30 2.7.2Magnification Gain.2-31 0-4 2.8Vertical Deflection System .2-32 2.8.1Flatness CHI/CH2/CH3 (SS-7810) .2-32 2.8.2Attenuator Compensation CH1/CH2.2-33 2.8.3Attenuator Compensation CH3 (SS-7810).2-34 2.8.4High-frequency Compensation CH1/CH2 .2-34 2.8.5High-frequency Compensation CH3 (SS-7810).2-35 2.8.6Bandwidth.2-36 2.9Horizontal Deflection System .2-37 2.9.1High-speed Sweep Rate.2-37 2.9.2Sweep Linearity at High-speed Sweep Rate (SS-7810).2-38 2.10 Calibrator Output.2-39 2.11 Automatic Adjustment .2-40 2.11.1 Automatic Adjustment Item.2-42 2.11.2 Error Message.2-43 2.12 Automatic Confirmation.2-50 2.12.1 Automatic Confirmation Items .2-51 2.13 Manual Adjustment Menu .2-52 2.13.1 Manual Adjustment Items .2-53 2.13.2 Vertical Gain .2-55 2.13.3 Trigger.2-56 2.13.4 X-Y Gain and Position .2-57 2.13.5 Manual Adjustment Procedure .2-58 2.14 Adjustment Jig IE-1066.2-72 2.14.1 Specifications .2-72 2.14.2 Preparation.2-72 2.14.3 Adjustment of IE-1066.2-73 2.14.4 Schematic Diagram .2-75 Section 3 Block Diagram SS-7810 Block Diagram.3- 1 SS-7805/04 Block Diagram.3- 7 Section 4 Electrical Parts List SS-7810 Parts List CH1 ATTENUATOR 1 .4-10 CH2 ATTENUATOR 2 .4-12 CH3 ATTENUATOR 3 .4-14 CH1 1ST PREAMP 4 .4-15 CH2 1ST PREAMP 5 .4-17 CH1 2ND PREAMP 6.4-18 CH2 2ND PREAMP 7.