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(3) No Hands Free
Hand Free key on.
YES
Is H/F on?
YES
Does reset circuit appear
normally to IC501 pin56?
3.3V
YES
Is it oscillates to IC501
pin 23, 24 by X501 oscillator?
OSC: 19.2MHz
YES
Does signal output appear to
IC501 Pin 26, 27, 33, 34?
YES
Does signal output appear to
IC501 Pin 30, 37.
YES
OK
NO
Check whether is power
output (3.3V) to IC502 pin2.
NO
Defect to IC503
NO
Defect to X501, C505, C506.
NO
Defect to MIC901, JK503,
NO
Defect to MIC901, JK503,
- 2-3 -
JK504.
JK504.
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