Re: Pixelview Pro Ultra FM radio tuner | |
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Hi, Am Mi, den 01.06.2005 schrieb Mauro Carvalho Chehab um 02:01: > I'd like to identify datasheet to the FM radio tuner of PV Pro > Ultra, to check if the current implementation might be improved. I'm > submitting all chips and xtals I found on my PV-TV 304P+ FM.RC. May > somebody help me to identify what is VR1 and U6 chip? One strange thing > is that TDA9801 (according with Philips available datasheet) doesn't > have I2C support. So, I'm supposing that VR1 provides I2C > implementation. On Ymec datasheet, the tuner has I2C support. > the IF part on most of the tuners is hardwired, only newer multinorm tuners with the tda9885/6/7 need programming. Even them it can be disabled when they are set to NTSC only. Now also the silicon tda8275/8290 is there. > Tuner: Ymec TVision 5533MF > Label on the board: 8533 Ver A.1 > Chips: > VR1: EPCOS M1958M This is a discontinued SAW filter designed for intercarrier demodulation use on NTSC-M/PAL-M like systems from www.epcos.de and only passive. > VR2: TDA9801T > Xtal: > X1: YC4.000 > > Card: Rev. 2F (TEAN T1 94V-0) > Chips: > U1: Jaecs IRDC 357-M > U2: (not found. May be there is a empty space below the tuner?) > U3: - HEF 4502BT > U4: - Conexant CX 23883-19 > U5: - (not soldered) > U6: - It is a metal plated chip (or blinded miniboard) without > any identification, measuring about 1,4 x 1,4 cm, with 1 pin on the top > of right side and 6 pins distributed on the left site. Any Ideas? > U7: - (not soldered) > Xtals: > Y1: TQ 4.000 > Y2: TQ 28.636 > > There is a coaxial plug for TV ant. connected directly to the tuner. > The card has a separate connector to FM antenna. The board track from > antenna, apparently, is not connected to the tuner. May be U6 is the FM > tuner. Instead of blinded it could also be shielded. This should be the candidate, also for example on Marcelo's board with an radio capable tuner it is not there. http://www.marcelotoledo.org/log But L E O N (mjardeli) seems to have the same on his bttv Pixelview PlayTV Mpeg2 bttv and you can compare in the bttv-gallery. This does not look like a TEA5767 variant, they differ also from each other by pin numbers. The tea5767 still needs some additional external components around and then looks more like a recent dvb demodulator or the philips silicon tuner parts. You can see examples on the just mentioned Tevion Xpert and MSI TV@nywhere Master by searching Gunther's collection for tea5767. Also if you can see some of the pinning you most likely can exclude it comparing with the datasheets. (nothing in *.inf?) Good luck, guess you still need it. Hermann -- Unsubscribe mailto:video4linux-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list
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