78
5V
5V
5V79
80
76
58
5V
5V59
60
20
YES
YES
OFF
PCTL
HRST
ON
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
TROUBLESHOOTING
- 11 -
1. POWER PART
Turn power on.
IC402 Pin 1 input +5V(D1)
PN402, PN804 +5V(AII)
check?
PN402, PN804 Defective.
IC802, 805 Surrounding
circuitry defective.
á X401 defective.
á IC402 defective.
Pattern defective.
IC801, 803 defective.
IC402 defective.
IC401 defective.
á IC101 defective.
á PN402 defective.
á Pattern defective.
IC402 Pin 6 PCTL output?
Power P.C.B PCTL pattern?
IC402 Pin 2 HRST output?
IC401 Pic 17 Reset check.
OK
IC401 Pin 58, 59, 60, 20 Check?
IC101 (H8) Pin 78, 79, 80, 76 Check?
IC801, 803 check?
á Pin 1 +12V
á Pin 2 +5V
A
2-1
2-2
2-3
2-4
2-5
B
- 12 -
DOOR OPEN/CLOSE
CHECK?(LOADING)
Is rotate turret?
Is DISC play?
Is lead-in?
When laser does not light.
When laser lights.
Is audio output?
2. CD PART
YES
OPEN L
56
H
L
H
CLOSE
YES
YES
YES
YES
NO
NO
NO
NO
NO
- 13 -
2-1. DOOR OPEN/CLOSE PART(LOADING)
Door open/close?
IC112 Pin 5, 6 input?
á ZD 104(5.1V)?
á IC112 surrounding
circuitry check?
á CLOSE leaf s/w defective.
á IC101(H8) Pin 23, 24
defective.
á ZD104 defective.
á +12V-CD defective.
á IC112 defective.
á 2, 10 pattern defective.
PN102 defective.
Pick-up defective.
IC112 Pin 2, 10 Output?
Pick-up MOTOR?
OK
PN102 MOTOR input
defective?
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO NO
NO
NO
NO
NO
NO
NO
NO
YES
Is Rotation turret?
leaf S/W defective.
Limit S/W 0V(LOW) check?
IC103 Pin 14 output check?
IC101 defective
IC104 Pin 77, 78. 79 check?
IC101(H8) DATA, CLK, XLT
check?
IC111 Pin 2,10 output check?
PN104 input check?
PN103 conector check.
Pick-up check?
Pick-up defective.
OK
Down leaf S/W (PN102)0V
(LOW) check?
IC101(H8) Pin 49, 53, 21, 22
check?
2-2. TURRET PART
¥ IC102(H8)defective.
¥ IC102 Pin 49, 53,
21, 22 pattern
defective.
¥ IC103 Pin 22, 23,
24 input defective.
¥ IC102 defective.
¥ IC101 Pin 41, 42,
43 pattern
defective.
¥ IC104 defective.
¥ IC104 X-TAL Pin
53, 54 defective.
¥ IC 111defective.
¥ IC 111 Pin 5, 6
input defective.
¥ R111defective.
¥ IC103 defective.
IC110 Pin 11, 12 output
pattern defective.
IC 110 Pin 11, 12 output
check?
IC111 Pin 2, 10
output defective.