Situation so far:
Camera is chinese DS-2CD2132F-IWS. Sticker says 5.2.8 141231. Firmware is multilanguage. I updated to 5.3.0 from hikvision site. Camera went to minsystem state. I had trouble starting
TFTP update but finally the key information was to delete windows firewall tftp rules despite the firewall was off. After that Windows 7 laptop connected to router with camera started upon powering the camera transmitting new firmware to camera memory. I powered the camera with 12vdc transformer. TFTP works good and in the end I get that system update complete.
I used 5.3.0 downgrader firmware and still the camera is currently at minsystem state. I used telnet to check system log and there was that initramfs unpacking failed junk in compressed archive -message and booting goes to minsystem state. Next I tried 5.1.6, then 5.2.0 and last 5.2.3. After those the camera was not seen at all by SADP nor was pingable so finally I went back to downgrader firmware. So it all comes to finding compatible firmware to this chinese camera. Serial number has CCCH. Perhaps I should ask from seller.
Maybe chinese firmwares would work and then mtd hack to english? But I would prefer multilanguage since Finnish is my native language. Though I have few Chinese hikvision cams, maybe those modded firmware could the answer...