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  1. Sukhbinder

    pioneer DEH-1590UB service manual

    any one having the service manual for the pioneer DEH-1590UB CD Receiver. thanks in advance.
  2. Sukhbinder

    pioneer MVH-1490UB service manual

    Looking for the service manual for pioneer MVH-1490UB. thanks in advance
  3. Sukhbinder

    What do you mean by 3 1/2, 3 3/4 digits specs for a DMM

    Some one asked me about the 3 1/2 , 3 3/4 specs for a DMM, i explained it as i found it in a book but i'm myself not completely satisfied with the explanation. Do any of you guys have a good explanation for the above. I do understand the digits specs like 1999, 3999, 5999, 79999 (as i have them...
  4. Sukhbinder

    Need part number for SMD with code 31-OQ

    I'm looking for the part number for the SMD component with the code 31-OQ written on it (the O and Q have a minus sign on top of them). Its a 6 pin device in a SOT 26-3 or SOT 363 package (not sure of the dimensions). it is used in the power supply section of a MP3 player circuit (seems like...
  5. Sukhbinder

    Variable supply using LM317 with 32Vrms transformer rating

    We needed some variable power supplies back at my college where i teach and came across some old multi voltage supplies which were dead but the transformers were fine.  I planned to make a variable supply using the LM317 but the transformer has a winding of 32Vrms that i plane to use but 32Vrms...
  6. Sukhbinder

    Planning to get a new temperature controlled Soldering Iron

    Hi Guys, i have been using a 25W Solderon soldering iron for the past 15 years. i used a fine chisel tip with it, earlier i have been working with normal PCBs, but now since most of the PCB now have become more of SMD type and are much smaller in size, i am planning to get a new temperature...
  7. Sukhbinder

    Hitachi oscilloscope CRT pinouts and specs needed

    We use a CRT setup as a part of our experiment for our students to calculate the e/m ratio of the electron. The experiment is usually referred to as finding e/m ratio using magnetic focusing. The supply to the CRT seems to have some problems and the setup is quite old and no circuit diagrams...
  8. Sukhbinder

    what's the difference between 1N5402, HER502, and FR502 diodes?

    what's the difference between 1N5402, HER502, and FR502 diodes? The 1N5402 is a 3A 100V general purpose rectifier diode. The HER502 is a 3A 100V high efficiency rectifier diode. The FR502 is a 3A fast recovery diode. The fast recovery diode is used for damping the reverse EMF in relays or other...
  9. Sukhbinder

    Sony KV-LS21M80 21" CTV service Manual needed

    In Need of Sony KV-LS21M80 21" CTV service Manual. please post if any one has it. Thanks in advance ;)
  10. Sukhbinder

    Spectrumanalyzer, Oscilloscope and Wave Generator with the help of a soundcard

    Spectrum analyzer, Oscilloscope and Wave Generator with the help of a sound card and the audio tester. Just found a piece of software on the internet which i think is worth sharing with you Guys. With the help of a high quality sound card your PC will be an audio lab. You measure frequency...
  11. Sukhbinder

    Sony CDX-757MX service manual

    Any one having the service manual for the Sony CDX-757MX 10 CD changer with MP3 support. Thanks in advance ;)
  12. Sukhbinder

    PAL007A datasheet

    anyone having the data sheet for the PAL007A power amp from pioneer corp. its a 50Wx4 BTL amp from the KEH-P4025 car audio from pioneer. ???
  13. Sukhbinder

    Pioneer KEH-P4025/4020 service manual

    Hi any one having the Pioneer KEH-P4025/4020 service manual. the 4025 has the same manual as the 4020. please post it if anyone has it. thanx ;)
  14. Sukhbinder

    Cutoff frequency and 3dB points

    What is the logic behind the cutoff frequencies being defined at the 3dB points? why do we use the 3dB points only. is there some thing to do with transient time? these are some things we all study in our courses but what's the basis of these concepts. any one who can explain these basic...
  15. Sukhbinder

    Sony CFD-F17CP Schematic & Service manual

    any one having Sony CFD-F17CP Schematic & Service manual. thanks in  ;)advance
  16. Sukhbinder

    Need 2SA514 datasheet

    Hi guys, i have a cordless drill/driver (make TGF china). it uses a transistor to control the speed of the drill/driver along with the trigger control. th emore u press the trigger the faster the rpm. the transistor is a TO-220 style package with A514 written on it (which i presume is 2SA514 as...
  17. Sukhbinder

    FM receiver circuit

    Hi guys, i'm looking for a FM receiver circuit for use with cordless microphones. any normal Fm receiver serves the purpose well but i need a dedicated receiver for my FM Mic. could any suggest any circuit with minimal components ( at least the indictors should be the least as they are the most...
  18. Sukhbinder

    Siemens S4 mobile service manual

    Anyone got info on the Siemens S4 mobile. I want to know which chip was used to send different square waves for different ringtones. thanks
  19. Sukhbinder

    Care for Lead acid batteries

    i just got an inverter installed. its a 800 VA system with a pure sine wave output and runs on a 12V 190Ah lead acid battery. i know that the electrolyte level has to be topped up each 2-4 months in the battery, i want to know that when adding water to the battery should i use distilled water or...
  20. Sukhbinder

    EPSON EPM-4207 motor wiring connections

    i need the wiring code for an EPSON EPM-4207 stepper motor. it is a 6 wire bipolar motor with 1.8 degree step. i found using goggle that it is epson stepper motor used in a its printers. it has 6 wires in 2 groups. one group has a brown,red and white wire, and the other has a brown,orange and...
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