Panasonic PT-EZ770T - Page 46

INF-38
SECTION 1 SERVICE INFORMATION
■ [A] P.C.Board operation check
■ Main microprocessor check
A
Check the clock waveform around IC1102
X1008 : 35.455MHz
 R1709:24.576MHz
 R1713:40.3MHZ
NG
A Check IC1102, X1008 and peripheral circuits
A Check the voltage (DC 6.0V) at pins 4, 5, 6 of connector [A15]
NG
A
Replacethecablebetween[K9301]-[A15]
Replace[P]P.C.Board
A Check the voltage (DC 1.8V) at L1082
NG
A Check IC1046 and peripheral circuits
A Checktheclocksignal(35.455MHz}atR1712
NG
A Check X1008 and peripheral circuits
A Check the voltage (DC 3.3V) at L1076
NG
A Check Q1047, Q1048, IC1052 and peripheral circuits
A
Check the voltages (DC 3.3V) at pins 11, 18, 29 and 55 of
IC1030(SUB CPU)
NG
A Check IC1030 and peripheral circuits
A Check the voltage (DC 1.2V) at L1079
NG
A Check IC1045 and peripheral circuits
A Checkthevoltage(DC3.3V)atpin1ofIC1031(RESET)
NG
A Check IC1031 and peripheral circuits
A CheckIC1043(FLASHROM)andperipheralcircuit.
NG
A CheckIC1102(CPU&RESIZE)andperipheralcircuits
A
Check the clock waveform around IC1104
 R2224:33.3MHz
 R2225:25MHz
IC1104-D28 : 60HZ
NG
A Check IC1104, X1009, X1010 and peripheral circuits
A
Check the clock waveform at the point below;
<EZ770>
 R1803(LVDS_CK)76.819MHz
 <EW730/EX800>
 R1803(LVDS?CK)53.183MHZ
NG
A Check IC1400 and peripheral circuits
A Checkthewaveform(LVDSoutput)atR2502,R2508
NG
A CheckIC1103(FPGA)andperipheralcircuits
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK