WARNING
Check that exposed parts are acceptably insulated from the supply circuit before returning the repaired
instrument to the customer.
CHECKING METHOD
Measure the resistance value between the both poles of
attachment cup (power supply plug) and the exposed
parts (parts such as covers etc. where the customer can
easily touch) and check that the resistance value is
500k ohms or more.
SAFETY PRECAUTIONS
The following precautions should be observed when servicing.
Since many parts in the unit have special safety related characteristics, always use genuine HITACHI
replacement parts. Especially critical parts in the power circuit block should not be replaced with other makers.
Critical parts are marked with a
!
in the circuit diagram and printed wiring board.
Before returning a repaired unit to the customer, the service technician must thoroughly test the unit to
ascertain that it is completely safe to operate without danger of electrical shock.
Summary of Contents for HTA-DD1E
Page 8: ...17 x 4 10 Removal of Foot a Remove 4 screws to remove foot Fig 7 ...
Page 11: ...SM0102 WIRING DIAGRAM ...
Page 12: ......
Page 13: ...SM0102 TUNER PCB ...
Page 14: ...SM0102 SURR PCB ...
Page 15: ...SM0102 DSP PCB ...
Page 16: ...SM0102 FL PCB ...
Page 17: ...SM0102 POWER PCB ...
Page 18: ...SM0102 VIDEO PCB ...
Page 19: ...SM0102 SPJK PCB ...
Page 20: ...SM0102 SW H P PCB ...
Page 21: ...SM0102 DIGITAL IN PCB ...
Page 22: ...SM0102 MAIN CIRCUIT ...
Page 23: ...SM0102 DISP TONE CIRCUIT ...
Page 24: ...SM0102 SURROUND MAIN AMP CIRCUIT ...
Page 25: ...SM0102 TUNER VOLUME CIRCUIT ...
Page 26: ...SM0102 DSP CIRCUIT ...
Page 27: ...SM0102 POWER SUPPLY VIDEO CIRCUIT ...
Page 28: ......
Page 45: ...MEMO ...
