4-16
4-15
A
1
2
3
4
5
6
7
8
9
10
11
12
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
SMPS
EAX66919101 Rev1.1(3) MAIN(#2)
2015.12.10
Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.
CIRCUIT DIAGRAMS
1. WOOFER SMPS & AMP - SMPS CIRCUIT DIAGRAM
WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD THE ORIGINAL
DESIGN BE MODIFIED OR ALTERED WITHOUT
PERMISSION FROM THE LG CORPORATION. ALL
COMPONENTS SHOULD BE REPLACED ONLY WITH
TYPES IDENTICAL TO THOSE IN THE ORIGINAL
CIRCUIT. SPECIAL COMPONENTS ARE SHADED
ON THE SCHEMATIC FOR EASY IDENTIFICATION.
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY
DIFFER FROM THE ACTUAL CIRCUIT USED. THIS
WAY, IMPLEMENTATION OF THE LATEST SAFETY
AND PERFORMANCE IMPROVEMENT CHANGES
INTO THE SET IS NOT DELAYED UNTIL THE NEW
SERVICE LITERATURE IS PRINTED.
1. Shaded( ) parts are critical for safety. Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmeter
during Play mode.
IMPORTANT SAFETY
NOTE :
Summary of Contents for SH4
Page 9: ...1 8 ...
Page 15: ...2 6 Figure 1 9 HOW TO DISASSEMBLE THE MAIN SET 9 Disassembly finish ...
Page 17: ...2 8 Figure 2 3 HOW TO DISASSEMBLE THE WOOFER 4 Disassembly finish ...
Page 21: ...2 14 ...
Page 36: ...3 15 2 FLASH MEMORY FIG 2 VCC CS CLK DO 4 5 6 7 6 7 5 4 VCC CS CLK DO ...
Page 38: ...3 17 4 USB FIG 4 1 5 V Voltage 12 FIG 4 2 USB D 13 FIG 4 3 USB D 14 12 14 13 ...
Page 40: ...3 19 6 OPTICAL FIG 6 1 OPT_IN 18 FIG 6 2 OPT_DET 19 19 18 ...
Page 53: ...3 42 3 41 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...
Page 55: ...3 46 3 45 ...
Page 62: ...4 7 4 AMP VOLTAGE FIG 4 2 AMP_12V FIG 4 1 AMP PVDD 10 11 11 10 ...
Page 63: ...4 8 5 PWM FIG 5 2 Woofer PWM SW Signal FIG 5 1 Woofer PWM SW Signal 12 13 13 12 ...
Page 64: ...4 9 6 LED FIG 6 2 Pairing On Status Green LED FIG 6 1 Pairing Off Status Red LED 14 15 15 14 ...
Page 65: ...4 10 ...
