+ Reply to Thread
Results 1 to 6 of 6

Thread: Sansui TU-7700

  1. #1
    Join Date: Jun 2008

    Location: Seattle & Portland

    Posts: 55

    Default Sansui TU-7700

    Well I hope this is the correct location for this thread and my apologies if not.

    I recently won the referenced tuner on eBay knowing in advance that it is weak in the AM band. Now it is due to arrive soon and I am wondering if anyone has some experience with this tuner. It apparently has an AM chip (HA-1151) for which I have found subs as well as nos stuff. I am going forward with that move as well as new caps and any funky looking resistors, diodes etc

    Does anyone have a gut feeling that the chip will probably do it or most of it, or am I barking up the wrong tree and should just sit tight until the radio gets here and I have a chance to dissect it?

    I did download the service manual so tracing should be at least possible.

    Thanks in advance for any insight here.


    Sansui: G-8000, AU-20000, AU-719, TU-666, TU-717, 2 AX-7s, SE-7, SC-1110, SC-3100, SR-333, SP-2000, SP-2500, RA-500. Yamaha: YP-D71. Denon: DL-160, DVD 2910. Shure V15 Type lll. Dual: 1019. Teac: PD-710M. Senheiser: HD600. Klipsch: Forte II. KLH: Model 10. Atwater Kent AM Console. Zenith: Transoceanic. RCA: Victor. and on and on and on
    The Avatar? June Foray, voice for Rocket J Squirrel.

  2. #2
    Join Date: Jun 2008

    Location: Seattle & Portland

    Posts: 55

    Default

    Ummm, well I ordered the chip and just received notice that it is backordered (grrr). Think I will try another electronics seller. I am starting to recap the tuner in the meantime. Cool looking tuner, I am so looking forward to hearing it for the first time.

    More later if wanted.

    dh
    Sansui: G-8000, AU-20000, AU-719, TU-666, TU-717, 2 AX-7s, SE-7, SC-1110, SC-3100, SR-333, SP-2000, SP-2500, RA-500. Yamaha: YP-D71. Denon: DL-160, DVD 2910. Shure V15 Type lll. Dual: 1019. Teac: PD-710M. Senheiser: HD600. Klipsch: Forte II. KLH: Model 10. Atwater Kent AM Console. Zenith: Transoceanic. RCA: Victor. and on and on and on
    The Avatar? June Foray, voice for Rocket J Squirrel.

  3. #3
    Join Date: Nov 2008

    Location: Dartmouth in beautiful Devon UK

    Posts: 1,243

    Default

    I think you need to fault find it by measurement, not randomly changing components?

    Dave

  4. #4
    Join Date: Jun 2008

    Location: Seattle & Portland

    Posts: 55

    Default

    Well yes, I didn't go into a lot of detail in the earlier posts, but I did in fact locate a bad am chip and some transistors as well. No problem on acquiring the parts. I do a recap on the older audio units as a matter of standard procedure.

    If anyone has a service manual for this tuner I would appreciate a copy.

    Thank you for your input.
    Sansui: G-8000, AU-20000, AU-719, TU-666, TU-717, 2 AX-7s, SE-7, SC-1110, SC-3100, SR-333, SP-2000, SP-2500, RA-500. Yamaha: YP-D71. Denon: DL-160, DVD 2910. Shure V15 Type lll. Dual: 1019. Teac: PD-710M. Senheiser: HD600. Klipsch: Forte II. KLH: Model 10. Atwater Kent AM Console. Zenith: Transoceanic. RCA: Victor. and on and on and on
    The Avatar? June Foray, voice for Rocket J Squirrel.

  5. #5
    Join Date: Feb 2008

    Location: North East UK

    Posts: 6,358
    I'm InSpace.

    Default

    Not quite a service manual, but you can download a schematic from here: http://www.hifiengine.com/manuals/sansui/tu-7700.shtml
    Shian7
    --------------------------------------------------------

    Kudakutemo
    kudakutemo

    ari mizu-no tsuki

    Though it be be broken -
    broken again - still it's there:
    the moon on the water.

    - Choshu.

  6. #6
    Join Date: Jun 2008

    Location: Seattle & Portland

    Posts: 55

    Default

    Thank you for that. I got the schematic and am on my way.

    I hope to have this operational by early April. That is when I am bringing the boat out of the water and will totally redo several systems, including the onboard audio system. Then in July, it's off for a 6-week trip through the San Juan Islands and up to the North tip of Vancouver Island. So looking forward to that trip.
    Sansui: G-8000, AU-20000, AU-719, TU-666, TU-717, 2 AX-7s, SE-7, SC-1110, SC-3100, SR-333, SP-2000, SP-2500, RA-500. Yamaha: YP-D71. Denon: DL-160, DVD 2910. Shure V15 Type lll. Dual: 1019. Teac: PD-710M. Senheiser: HD600. Klipsch: Forte II. KLH: Model 10. Atwater Kent AM Console. Zenith: Transoceanic. RCA: Victor. and on and on and on
    The Avatar? June Foray, voice for Rocket J Squirrel.

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •