Philips HTS3548W/55 Service Manual page 10

REPAIR INSTRUCTIONS (part three)-Main Unit
L
Tuner No Sound
Check SW Power
Output
See B
Yes
No
Check CN301 Q901ZD904
Check CN301 Pin9= +9V
And Its Conjoint Parts
Yes
No
CheckIC1 And
Check CN1 to CN301
Its Conjoint Parts
Cable L oose orINT
No
No
CheckVT Valtage
Check CN1Pin2/Clock
Pin3/Data,Pin4/CE Low Freq=0.8--1.8V
Affirm Correct Hi Freq=8.0--9.0V
No VT No Change
CheckIC1 OSCInput
CheckIC102IC108
Pin5---AM OSC
And Its Conjoint Parts
Pin3---FM OSC
No FM
RepairFM osc Section RepairAM osc Section
L6 or DT4 L12 or DT5
And Its Conjoint Parts And Its Conjoint Parts
2 - 4
MA IN UNIT REPAIR CHART 3/3
FM Function No Sound
Check CN302 IC301
And Its Conjoint Parts
Check Repair CN302 IC301 Check CF2 And
And Its Conjoint Parts Its Conjoint Parts
OK
CheckCN1 L12 CF3
And Its Conjoint Parts
And Its Conjoint Parts
OK
Check IC1 X1 C39
And Its Conjount Parts
OK
No AM
Check Main Pcb Of Tuner Input Circuit
M
No Svideo output
Check JK701 Pin1 Pin3
Video signal
OK
Yes
Check IC208 PIN133 PIN140
To JK701 ConjointParts
OK
L6 DT4
p
OK
No CVBS output
Check JK701 Pin5
Video signal
Yes
Check IC208 PIN134
To JK701 ConjointParts
2 - 4
O
Q
HDMI No Output
No Y Pr Pb output
Insert And Pull out HDMI
Check JK702 Pin12 Pin4
cabl e
Pin5 Video signal
Yes
Yes
Check IC602 3.3V And 1.8V
Check IC208 PIN137 PIN138
pin139 To JK702 ConjointParts
OK
Check C300
OK
Check IC602 PIN72:ASPDIF
PIN77: ALCK
OK
See C
No
CheckQ610 Q611 Q609
And Conjoint Parts
No
Check Q203 Q204
And Conjoint Parts
No
CheckC300
And Conjoint Parts
No
Check IC602 IC208
And Conjoint Parts