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SE-DIR800C
31
5678
56
7
8
C
D
F
A
B
E
Symptoms: Failure in sound and indication of the cordless headphones (Checking the headphones)
START
Insert the battery and set the Power switch to ON.
Does the LED light up?
Is each voltage
(VCC, A1.5 V, D1.5 V,
A2.5 V, D2.5 V, and
DAC2.5 V) OK?
Is sound output while
signals are being received?
OK
Check the Power Board Assy,
lead wires, and the peripheries
of Q1 and D1.
Check the Power Board Assy,
the peripheries of IC7, IC8,
and IC9, and the periphery of Q1.
Check the Photo Board Assy, and the
peripheries of the following:
IC1 (RF amplifier), IC2 (decoder),
IC3 (DAC), IC4 and IC5 (power amplifier),
and the speaker.
Ye s
No
No
No
Ye s
Ye s