Trouble Shooting Guide
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1
SMPS
&
AMP Section (Only NC-8114E/NC-8115E Model)
2
3
4
5
6
7
8
9
AC cord in
no
Tuner/AUX/CD/USB Speaker
sound
no
Phones sound
no
Power ON/OFF ON
Yes
1.Check F901
2.Check PT901
3.Check CN902 of 6pin:3.3V
4.Check CN902 of 7pin:(main power on)
5.Check CN700
6.Check IC707(MCU IC)of 33pin/40pin:3.3V
7.Check IC707(MCU IC) of 32pin:(main power
on)
no
VFD Display
1.Check CW903
2.Check CN702
3.Check FD701(VFD)
4.Check IC701(SC16315)
1.Check J301
2.Check IC702(IL4560D)
3.Check CN700
Yes
Yes
1.Check CN901 of 1/2/3pin voltage:33.5V
2.Check CW801 of 1/2/3pin voltage:33.5V
3.Check IC800(TDA7498): Voltage of 6/7pin
and 12/13pin :33.5V
4.Check IC800(TDA7498):Voltage of 20pin and
21pin :3.3V
5.Check IC801(SA1117BH-3.3):Voltage of
2pin :3.3V
6.Check IC400(SC7314S):
Voltage of 1pin: normal DC(9V).
7.Check TUNER/AUX/CD input signal
8.Check output signal pin of IC800(TDA7492P)
2/3pin, 8/9pin and 10/11pin,16/17pin.
9.Check output signal terminals(J800).
Yes
Summary of Contents for NC-8112E
Page 3: ...Safety Precautions 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9...
Page 4: ...1 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 Safety Precautions 1...
Page 19: ...3 3...
Page 21: ...4 4 Wiring Diagram Only NC 8112E Model...
Page 22: ...4 4 Wiring Diagram Only NC 8114E NC 8115E Model...
Page 23: ...4 4 Wiring Diagram Only NC 8117E Model...
Page 24: ...5 5 Block Diagram Only NC 8112E Model...
Page 25: ...5 5 Block Diagram Only NC 8114E NC 8115E Model...
Page 26: ...5 5 Block Diagram Only NC 8117E Model...
Page 27: ...6 6 Schematic Diagram FRONT TUNER Section...
Page 28: ...7 7 Schematic Diagram MP3 CD Section...
Page 29: ...6 6 Schematic Diagram MAIN Section Only NC 8112E Model...
Page 30: ...6 6 Schematic Diagram MAIN Section Only NC 8114E NC 8115E Model...
Page 31: ...6 6 Schematic Diagram MAIN Section Only NC 8117E Model TI POWER...
Page 32: ...6 6 Schematic Diagram SMPS Section Only NC 8112E Model...
Page 34: ...6 6 Schematic Diagram SMPS Section Only NC 8117E Model...
Page 35: ...7 7 P C B Pattern Layout FRONT Section Top View...
Page 36: ...7 7 P C B Pattern Layout FRONT Section Bottom View...
Page 37: ...7 7 P C B Pattern Layout TUNER Section Top View...
Page 38: ...7 7 P C B Pattern Layout TUNER Section Bottom View...
Page 39: ...7 7 P C B Pattern Layout MP3 CD Section Top View...
Page 40: ...7 7 P C B Pattern Layout MP3 CD Section Bottom View...
Page 41: ...7 7 P C B Pattern Layout MAIN Section Only NC 8112E Model Top View...
Page 42: ...7 7 P C B Pattern Layout MAIN Section Only NC 8112E Model Bottom View...
Page 43: ...7 7 P C B Pattern Layout MAIN Section Only NC 8114E NC 8115E Model Top View...
Page 44: ...7 7 P C B Pattern Layout MAIN Section Only NC 8114E NC 8115E Model Bottom View...
Page 45: ...7 7 P C B Pattern Layout MAIN Section Only NC 8117E Model Top View...
Page 46: ...7 7 P C B Pattern Layout MAIN Section Only NC 8117E Model Bottom View...
Page 47: ...7 7 P C B Pattern Layout SMPS Section Only NC 8112E Model Top View...
Page 48: ...7 7 P C B Pattern Layout SMPS Section Only NC 8112E Model Bottom View...
Page 49: ...7 7 P C B Pattern Layout SMPS Section Only NC 8114E NC 8115E Model Top View...
Page 50: ...7 7 P C B Pattern Layout SMPS Section Only NC 8114E NC 8115E Model Bottom View...
Page 51: ...7 7 P C B Pattern Layout SMPS Section Only NC 8117E Model Top View...
Page 52: ...7 7 P C B Pattern Layout SMPS Section Only NC 8117E Model Bottom View...
Page 57: ......
