Sony HCD-EC68P Service Manual - Page 35

6-11. PRINTED WIRING BOARD - LOW AMP Board - • See page 27 for Circuit Boards Location. • 1 2 3 LOW AMP BOARD : Uses unleaded solder. 4 A G MAIN BOARD CN633 (Page 30) B 5 1 CN104 JW132 JW131 JW133 JW136 C120 R135 R136 R133 Q101 B E D101 C125 R131 JW135 R132 Q102 B E R134 C126 C123 R125 R127 R129 R130 R126 JW134 D103 CN102 1 2 R113 C109 C107 C108 C110 4 C119 R111 R112 R114 R109 R103 R110 5 JW137 JR132 R122 R105 R101 C101 C116 C102 R107 R106 R104 R102 C103 R108 R145 C128 C104 H MAIN BOARD CN603 (Page 30) R128 C124 1 R142 C105 IC101 IC102 (EC68P/EC78P: UK) (EC78P: US,CND) C106 R123 15 R146 14 (14) 1-875-495- 6-12. SCHEMATIC DIAGRAM - LOW AMP Board - 1 2 3 4 5 6 7 8 9 A B C G D MAIN BOARD (1/3) CN633 (Page 31) LOW AMP BOARD -PRE -VCC +VCC LO+ LORO+ ROSUB GND LILI+ ST-BY RIRI+ +PRE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 (EC68P/EC78P: UK) (EC78P: US, CND) IC101 POWER AMP IC101 STK433-060 (EC68P) STK433-070 (EC78P: UK) IC102 POWER AMP IC102 STK433-090-E (EC78P: US, CND) 0 0 R113 47k 2 0 0 -35.2 -36.8 36.7 0 0 0 0 35.2 D101 MC2838-T112-1 Q101,102 OVER LOAD DETECT R133 22k R135 2.2k 0 0 Q101 2SA2026 0 R136 2.2k 0 Q102 2SA2026 R134 22k 0 0 R131 1.2k R129 0.22 2W C125 0.1 R132 1.2k R130 0.22 2W C126 0.1 C124 0.1 C123 0.1 C120 ∗ C119 ∗ R128 R126 220 220 R127 R125 220 220 R142 0 C105 100p C107 R111 470 R109 1k 47 25V C109 3p C108 47 25V R112 470 R110 1k R146 470 C106 100p R145 470 C103 470p C110 3p R114 47k R107 47k C101 1 50V R105 ∗ C104 470p R108 47k C102 1 50V R106 ∗ C128 0.1 R103 ∗ R104 ∗ ∗R105, 106 4.7k (EC68P) 22k (EC78P) ∗R103, 104 220 (EC78P: US, CND) 1.8k (EC78P: UK) 3.3k (EC68P) R102 0 CN104 5P OUT-L 5 -VH 4 +VH 3 OUT-R 2 PA-GND 1 TP105 TP104 TP103 TP102 TP101 D103 MA2J1110GLS0 ∗C119, 120 100 50V (EC68P) 100 63V (EC78P) R101 0 R122 100 C116 4700p R123 1k TP111 TP110 TP109 TP108 TP107 CN102 5P 5 4 3 2 1 IN-R A-GND IN-L AMP-ON PROTECT H MAIN BOARD (1/3) CN603 (Page 31) HCD-EC68P/EC78P 35 35 HCD-EC68P/EC78P