Pioneer VSX-52TX Service Manual - Page 125
Step 5: 5, 3V conversion, Step 6: DIR, IN2 CD-R/TAPE/MD pin 5
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5 A Pin 9 Does it convert 3V into 5V for 11 pin input? Yes Pin 12 Does it convert 3V into 5V for 8 pin input? Yes Pin 14 Does it convert 3V into 5V for 6 pin input? Yes Pin 16 Does it convert 3V into 5V for 4 pin input? Yes Pin 18 Does it convert 3V into 5V for 2 pin input? Yes End 6 No Replace IC952 No Replace IC952 No Replace IC952 No Replace IC952 No Replace IC952 5 6 7 Step 5: 5 → 3V conversion IC951 Pin 2 8 A Does it convert 5V into 3V for 6 pin input? Yes Pin 5 No Replace IC951 Does it convert 5V into 3V for No Replace IC951 B 3 pin input? Yes Pin 7 Does it convert 5V into 3V for 1 pin input? No Replace IC951 Yes C End Step 6: DIR IC601 Is S/PDIF signal coming ? (be different with Function) IN1 (TV/SAT) (pin 1) D Is pin 1 inputting it? No Check the OPTICAL-IN Assy and related path. Yes IN2 (CD-R/TAPE/MD) (pin 5) Is pin 5 inputting it? No Check the OPTICAL-IN Assy and related path. Yes E IN3 (DVD/LD) (pin 44) Is pin 44 inputting it? Yes B No Replace IC501 F VSX-52TX 7 125 8