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Step 6: DIR A
A
Check that the S/PDIF signal is output. Check that changes by pulling out and inserting the digital input lines. IC601 (pin 1) IN1 (OPT: TV/SAT)
IC952 (pin 14) Do convert 3 V into 5 V for pin 6 input? Yes IC952 (pin 13) Do convert 3 V into 5 V for pin 7 input? Yes To Step 5
No Replace IC952.
Can No Check the DIGITAL INPUT Assy, observe the digital signal and parts and patterns in the path. ? (0 V <-> 4 V) Yes IC601 (pin 5) IN2 (OPT: CD-R/TAPE/MD)
B
No
Replace IC952.
Can observe the No Check the DIGITAL INPUT Assy, digital signal and parts and patterns in the path. ? (0 V <-> 4 V) Yes IC601 (pin 44) Can observe the digital signal ? Yes IN3 (COAX: DVD/LD)
Step 5: X'tal
IC802 (pin 2)
C
No
Check the parts and patterns in the path.
(1.65 V center, amplitude more than 0.2 Vp-p) IN4 (COAX: CD)
Is there a 24.576 MHz output? Yes IC802 (pin 7)
No Replace IC802 or X801.
IC601 (pin 42)
Can observe the No Check the parts and patterns digital signal in the path. ? (1.65 V center, amplitude more than 0.2 Vp-p) Yes No Check the path to pin 45 of IC801. Replace IC802. IC601 (pin 27) Is there a master clock output? No Check the path to pin 30 of IC601. Replace IC802. MCKO2 (Master clock) Check that the data and clock signals are output.
Is there a 24.576 MHz output? Yes
D
IC802 (pin 5)
Is there a 24.576 MHz output? Yes To Step 6
Is the No voltage of PDN IC601-pin 31 5 V? (0 V <-> 3.3 V) Check the other assy. (surrounding of the Yes microcomputer) No No Replace IC601.
