Panasonic SA-HT280 Service Manual page 20

8. Type Illustration of ICs, Transistors and Diodes
9. Schematic Diagram
9.1. Schematic Diagram Notes
- This schematic diagram may be modified at any time with the
development of new technology.
Notes:
- S950 : Power switch (POWER)
- S951 : Speaker select switch (SPEAKERS A)
- S952 : Digital signal processor on/defeat select switch / (-DSP ON/
DEFEAT)
- S953 : Subwoofer low pass filter switch / (SUBWOOFER LOW
PASS FILTER)
- S954 : Subwoofer level switch (SUBWOOFER LEVEL)
- S955 : Tuning decrease switch (TUNING )
- S956 : Tuning increase switch (TUNING )
- S957 : Tuning mode preset switch (PRESET)
- S958 : Digital input select switch (DIGITAL INPUT)
- S960 : Tape monitor switch (TAPE MONITOR)
- S964 : Memory switch (MEMORY)
- S965 : Band select switch (BAND)
- S966 : FM mode select switch (FM MODE)
- S967 : Speaker select switch (SPEAKERS B)
- S969 : Help/reset switch (-HELP, —RESET)
- VR501 : Volume control VR (VOLUME)
- VR502 : Balance control VR (BALANCE)
- VR511 : Bass control VR (BASS)
- VR512 : Treble control VR (TREBLE)
- VR901 : Input select switch (INPUT SELECTOR)
- VR902 : DSP mode select switch (DSP)
- VR903 : SFC mode select switch (SFC MODE)
/
- Indicated voltage values are the standard values for the unit
measured by the DC electronic circuit tester (high-impedance) with
the chassis taken as standard. Therefore, there may exist some
errors in the voltage values, depending on the internal impedance