5 | 6 | 7 | 8 |
Symptoms: Failure in sound and indication of the cordless headphones (Checking the headphones)
A
START
Insert the battery and set the Power switch to ON.
No
Does the LED light up?
Yes
Is each voltage
(VCC, A1.5 V, D1.5 V,No
A2.5 V, D2.5 V, and DAC2.5 V) OK?
Yes
No
Is sound output while signals are being received?
Yes
Check the Power Board Assy, |
|
lead wires, and the peripheries | B |
of Q1 and D1. |
|
|
|
C
Check the Power Board Assy, the peripheries of IC7, IC8,
and IC9, and the periphery of Q1.
D
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.
E
OK
F
5 | 6 |
31
7 | 8 |
