Memorandum of Repair & Home brew

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[Tiny history of this web page]

Month Date Year Categories Manufacturer Model Articles
Nov.92014FM Tuners 3KenwoodKT-1000Increasing OSC coil inductance.
Oct. 12 2009 FM Tuners 3 ONKYO T-455nII Add an instruction manual.
Aug. 30 2009 Stereo Modulator Panasonic VP-7637A Add data sheet of  VP-7635A and VP7621A from  Helmut Singer Elektronik web site
Aug. 14 2009 Tape Decks 3 AIWA CS-R1 Replace drive belt.
Replace chemical capacitors.
July 12 2009 Oscilloscope National VP-5403A Add pictures of inside and plugins.
Repair of  inability to control intensity and disappearing of  trace in 1992.
June 8 2009 Oscilloscope National VP-5520C Replacement of  bulbs for scale ilumination and CH2 input BNC receptacle.
june 7 2009 CDP 1 Yamaha CDX-900D Replacement of  drive belt for disc tray.
May 17 2009 Oscilloscope National VP-5520C Adjust Main A-Sweep time base.
Mar. 23 2009 FM Tuners 2 Pioneer F-120 Comparison characteristics before and after adjustments.
Mar. 21 2009 FM Tuners 3 Kenwood KT-770 Comparison characteristics before and after adjustments.
Feb. 18 2009 Stereo Modulator Panasonic VP-7637A Check  voltage of  memory back up battery
Feb. 11 2009 FM Tuners 2 Kenwood KT-1100D Replace  shorted capacitor on 1/2 Vcc line.
Feb. 11 2009 Stereo Modulator Panasonic VP-7637A Repair pilot signal level drifting.
Feb. 1 2009 Topics efu WaveGene Synthesis of the stereo composite signal.
Jan 25 2009 Personal Computer Apple computer, Inc. Classic II Adjust the voltage of +5V AVR
Re-soldering the fly back transformer
Jan. 12 2009 FM Tuners 3 Kenwood KT-1000 Adjustment of SCA cancellation.
Jan. 11 2009 Personal computer Apple computer, Inc. Classic II Replacement of the chemical capacitors.
Jan. 1 2009 Tape Decks 3 AKAI GX-73 Replacement of  the cam belt.
Adjustment of potentiometers for cam wheel motor.
Dec. 30 2008 Frequency Counter Me! LS-223 Measuring the input signal  sensitivity.
Dec. 14 2008 Tape Decks 2 Kenwood KX-880D Replacement of  the shorted capacitor for the +5V AVR.
Dec. 14 2008 Standard Signal Generator Megro MSG-2570 Schematic of  the  internal oscillator.
Nov. 28 2008 Standard Signal Generator Megro MSG-2570 Restoration of a junk SSG.
Oct. 12 2008 FM Tuners 1 Kenwood KT-1010F Replacement of the shorted memory back up capacitor.
Oct. 5 2008 Midi Master Keyboard AKAI Pro. MX1000 Replacement of the dimmed EL panel.
Aug. 17 2008 Tape Decks 1 AIWA AD-F70 Repair of  the capstan motor.
Aug. 14 2008 FM Tuners 3 SONY ST-5150D Manual and schematic.
May 17 2008 Topics 1 --- --- Correction about 700T's detector.
Jan 1 2008 Topics 1 --- --- Corrections about some FM Tuners.
May 6 2007 Links --- --- Update the link of Audio Heritage web page.
Jan. 2 2007 Topics 1 --- --- FM detectors for Hi-Fi tuners.
Jan. 1 2007 Tape Decks 1 Pioneer CT-970 Some troubleshoots.
Aug. 16 2006 --- --- --- Add a references page.
Feb. 4 2006 FM Tuners 2 Kenwood KT-1100D Add an inside page.
Dec. 11 2005 FM Tuners 2 Kenwood KT-1100D Create new pages.
Nov. 20 2005 FM Tuners 2 Pioneer F-120D Create new pages.
Nov. 13 2005 Oscilloscope MCI VP-5403A Create a new page.
Nov. 6 2005 Microphone Lo-D UCM-8W Add new pages.
Nov. 6 2005 Clock Me! 5316-24 Add inside pages.
Oct. 30 2005 Oscilloscope MCI CT-511A Add inside pages.
Oct. 29 2005 Tape Decks 3 Technics M-02 Create a new page.
Oct. 29 2005 Power Supply Me! PS-2 Add a inside page.
Oct. 25 2005 Clock Me! 5316-24 Add new pictures.
Oct. 23 2005 Power Supply Me! PS-2 Create a new page.
Oct. 23 2005 FM Tuners 2 Sansui TU-S707X Add inside & trouble-shoots pages.
Oct. 16 2005 FM Tuners 2 Sansui TU-S707X Create new pages.
Oct. 15 2005 FM Tuners 2 TRIO
Pioneer
Sansui		 KT-1100D
F-120(D)
TU-S707X		 Add new pictures.
Oct. 09 2005 Tape Decks 1 Pioneer CT-970 Create new pages.
Oct. 08 2005 Tape Decks 2 TRIO KX-880
KX-880SR
KX-880D		 Add new pictures.
Oct. 03 2005 FM Tuners 1 TRIO KT-880F
KT-1010F		 Create new pages.
Oct. 02 2005 Tape Decks 1 AKAI GX-7 Create new pages.
Oct. 01 2005 Tape Decks 1 AIWA AD-F70 Add trouble-shoots pages.
Sep. 25 2005 FM Tuners 1 TRIO KT-900 Add trouble-shoots pages.
Sep. 25 2005 Oscilloscope MCI CT-511A Add new pictures.
Sep. 24 2005 Tape Decks 1 AIWA AD-F70 Add inside pages.
Sep. 20 2005 Tape Decks 1 AIWA AD-F70 Create new pages.
Sep. 18 2005 FM Tuners 1 TRIO KT-1100 Add some articles.
Sep. 18 2005 FM Tuners 1 TRIO KT-900 Create new pages.
Sep. 11 2005 FM Tuners 1 TRIO KT-1100 Add trouble-shoots pages.
Aug. 30 2005 FM Tuners 1 TRIO KT-1100 Create new pages.
Aug. 15 2005 Frequency Counter Me! LS-223 Create new pages.