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3-9
ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART
4. PWM MODULATION PART
PWM modulation
part check
Refer to
SMPS troubleshooting.
Check IC602 TAS5548 VDD
power(pin9, 14, 35, 50).
Replace the related part.
Check resitance output of line
DATA: R610, CLK: R611.
Check the related part of X600.
Replace the related part.
Check IC602 TAS5548.
OK
Replace the related part.
Replace the related part.
Check
IC104 Pin3: 3.3V
If it is YES, then OK. If it is NO, then check
IC104 Pin2: 3.7VA --> IF it is NO, refer to
SMPS troubleshooting.
Check
if X600 12.288 MHz is
working.
NO
NO
NO
NO
Check
IC602 TAS5548 Pin11 CLK
input.
Check output
of IC101 LC87FC096AVU
Pin32: PWM_CLK, Pin31: PWM_DATA
Pin19: PWM_RESET
Check
IC602 TAS5548 input
Pin20 -> DATA, Pin21 -> CLK
Pin16 -> RESET
Check PWM
modulator output FL49(+) 48(-),
FR47(+) 46(-).
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
Содержание FA162
Страница 15: ...2 2 MEMO ...
Страница 19: ...A60R A60L 4 SPEAKER SECTION FAS162F ...
Страница 46: ...3 27 7 AUDIO PART I2S ...
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Страница 61: ...3 55 3 56 2 MAIN P C BOARD TOP VIEW ...
Страница 62: ...MAIN P C BOARD BOTTOM VIEW 3 57 3 58 ...
Страница 63: ...3 59 3 60 3 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 64: ...3 61 3 62 4 TOUCH P C BOARD TOP VIEW 5 TOUCH SLIDE P C BOARD TOP VIEW BOTTOM VIEW BOTTOM VIEW ...
Страница 65: ...3 63 3 64 MEMO MEMO ...