8
RX
D-M9
09/LS
-M9
09
8. PWM MODULATION PART CHECK
P7905 PIN9,10
3.3V Check
PWM MODULATION
PART CHECK
Refer to SMPS
Troubleshooting
NO
NO
NO
NO
Check
X601 12.288MHz
Operation.
IC604
PIN86 CLK INPUT
Check
Check
IC100(LC87Fxx)
PIN22:PWM REST
PIN79:PWM SDA
PIN80:PWM SCL
OUTPUT
YES
YES
YES
YES
YES
YES
YES
YES
Check
IC604(PS9830)
DATA INPUT PIN23,24,25,26
PWM WAVE
Check.
Check PWM
Modulator output
FL:PIN75(+),74(-)
FR:PIN71(+),70(-)
OTHER OUTPUT
Check
Check IC604(PS9830)
VDD PIN VOLTAGE
(3,10,22,29,39,47,56,65,72,87,94)
Check X601 PIN2 :3.3V
OK
Replace X601.
NO
YES
Check X601
12.288MHz
OK
Replace R671,R670,R665
NO
YES
YES
Check LINE
Resistor output
SDA:R671,SCL:R670
RST:R665
Refer to DVD troubleshooting
NO
Check
DVD ASSY Communication
P7403
Check each LINE
Resistor output
NO
Check
IC604(PS9830) DATA
INPUT
OK
YES
OK
Replace IC604.
NO
Check
IC604(PS9830)
YES
OK
NO
9. POWER AMP PART CHECK
YES
YES
NO
Refer to SMPS Troubleshooting.
P7905 PIN3:+12v
PIN13,14,15:32V
YES
YES
NO
Check each line resistor output voltage.
Check each
IC700 PIN1,22,23,44:+12V
INPUT
YES
NO
Replace the coil.
Check output
line coil.
POWER AMP PART CHECK
OK
Check each IC700
PIN27,26,32,35,40,41 INPUT VOLTAGE
YES
Check PWM Modulator input
each PIN6,8,16,18.
YES
POWER IC700
PIN28,31,36,39 output.
Note: This shooting is the original circuitry so there are some different points from RXD-M909.
TROUBLESHOOTING