- 2-4 -
(2) If initial reading is not carried out(with Disc)
Is IC201 Pin42 output
waveform normal?
• Limit SW contact defective.
• Connector depective.
• Patter short.
Dose disc motor rotate?
• IC 601
defective.
• Connector
defective.
• Pick up
defective
Is TER signal
output at IC601
pin34 ?
• Pattern
defective.
• IC 603
defective.
• Pick up
defective
• Connector
defective.
• IC 601
defective.
Dose IC601 pin20 (LOCK) as figure?
Is HF wave-
form output?
IC601 pin 2
Is tracking servo
operating?
Is the lower IC601
pin2 waveform flat?
Is signal output at
IC601 pin29
Is rotation normal?
Is there any irregularity in
frequency?
Is HF signal normal without
dropout?
• Disc initial reading
damaged defective.
• Pick up defective.
Dose laser light?
Is signal output at tracking output IC603
pin26 ,27 ?
YES
YES
YES
YES
Door open
Door close
LOW
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
3~4V
0V
NO
NO
NO
A
B
Summary of Contents for CD-372A
Page 16: ... 2 11 INTERNAL BLOCK DIAGRAM OF ICs LC72131 Block Diagram Pin Assignments Top View ...
Page 17: ... 2 12 Pin Assignments Top View TDA7440D Block Diagram ...
Page 18: ... 2 13 S3C8248 Block Diagram Pin Assignments Top View ...
Page 19: ... 2 14 TA2149BN Block Diagram KIA8207K TA8207K Block Diagram ...
Page 20: ... 2 15 TDA2104 MP3 DECODER Block Diagram Pin Assignments Top View ...
Page 23: ...2 20 2 21 BLOCK DIAGRAM ...
Page 24: ...2 22 2 23 SCHEMATIC DIAGRAMS 1 MAIN SCHEMATIC DIAGRAM ...
Page 25: ...2 24 2 25 2 µ COM SCHEMATIC DIAGRAM ...
Page 26: ...2 26 2 27 2 µ COM SCHEMATIC DIAGRAM FOR MP3 ...
Page 27: ...3 TUNER SCHEMATIC DIAGRAM 2 28 2 29 ...
Page 28: ...2 30 2 31 4 CD SCHEMATIC DIAGRAM ...
Page 29: ...4 CD SCHEMATIC DIAGRAM FOR MP3 2 32 2 33 ...
Page 30: ...2 34 2 35 5 DECODER SCHEMATIC DIAGRAM FOR MP3 ...
Page 31: ... WIRING DIAGRAM 2 36 2 37 ...
Page 32: ...2 38 2 39 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD DIAGRAM COMPONENT SIDE ...
Page 33: ...2 40 2 41 1 MAIN P C BOARD DIAGRAM SOLDER SIDE ...
Page 35: ...3 CD P C BOARD DIAGRAM COMPONENT SIDE 2 44 2 45 3 CD P C BOARD DIAGRAM SOLDER SIDE SIDE ...
Page 37: ...3 3 3 4 MEMO MEMO ...