A bit late, but may be useful for others, owners manual :
TASCAM 244 PORTASTUDIO Service Manual free download, schematics, eeprom, repair info for electronics
Tascam 244 Portastudio Manual - 4-Track Mixer Recorder - HiFi Engine
I am still trying to find the service manual....
here its available the service manual of the 246, it seems similar but...
TASCAM 246 SCH Service Manual free download, schematics, eeprom, repair info for electronics
TASCAM 244 PORTASTUDIO Service Manual free download, schematics, eeprom, repair info for electronics
Tascam 244 Portastudio Manual - 4-Track Mixer Recorder - HiFi Engine
I am still trying to find the service manual....
here its available the service manual of the 246, it seems similar but...
TASCAM 246 SCH Service Manual free download, schematics, eeprom, repair info for electronics