Goldstar FL-800K TROUBLESHOOTING

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?

- 14 -

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.

- 15 -

A

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO NO

OK

Pick-up lens check?

PN105 check?

Q101 collector 2.0V?

IC109 Pin 1 2.8V(LD) check?

When laser does not light.

IC101 Pin 49 check?

Limit S/W defective.

IC101 defective.

PN105 defective.

Pick-up defective.

PCTL

HRST

IC 101 Pin 39 output LOW check?

(LDON)

2-3. DISC PLAY PART (

,

)

B

A

¥ IC109 defective.
¥ IC109 Pin 2 defective.

¥ Q101 defective.
¥ R136 defective.

- 16 -

YES

YES

YES

NO

NONO

B

NO

C

Q101 defective

IC 109 Pin 17 HFoutput?

When laser lights.

IC 103 Pin 5 output (FEO)?

IC 101 Pin 21, 26 output check?

Does the lens move up and

down?

¥ IC110 Pin 25

input defective.

¥ IC110 defective.

¥ IC103 defective.
¥ C122 defective.

¥ PN105 defective.
¥ Pick-up defective.

- 17 -

C

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

5V

2.5V

2.5V

NO

The waveform of IC109 Pin
17 is below figure?

IC103 ÒFOKÓ signal output?
(Pin 33 check?)

IC101 (H8) Pin 33 FOK input
check?

IC101 (H8) Pin 33 defective.

IC109 ÒFEOÓ output?
(Pin 16)

IC103 FZC Pin 46 SENS
output check?

IC104 MDP signal output?
Pin 4 check?

IC110 disc MOTOR output
17, 18 check?

FEO

0.5~1.5V

(FZC)

(SENS) (5V)

¥ IC103 defective.
¥ IC103 Pin 39, 40

defective.

¥ Turntable height error.
¥ Laser diode gegraded.

¥ Pick-up defective.
¥ PN104 defective.

¥ Pin 4 pattern defective.
¥ X102 defective.
¥ IC104 defective.

¥ IC109 defective.
¥ VR102 defective.
¥ PN105 connrctor defective.
¥ Pick-up defective.

¥ IC103 defective.

¥ IC110 defective.
¥ IC110 Surrounding

circuitry defective.

YES

YES

YES

YES

YES

NO

NO

NO NO

NO

5V

5V

OK

2-4. Is lead-in

- 18 -

Is lead-in?

IC 101 Pin 10 input check?

IC 104 Pin 42 ÒGFSÓ input?

IC104 defective.

IC 101 Pin 9 SQCK check?

IC 104 Pin 24 EFM check?

IC 103 defective.

IC 101(H8) defective.

IC 101(H8) Pin 19 SCOR check?

IC101 defective.

IC104 Pin 42 pattern
defective.
IC104 defective.

- 19 -

2-5. Audio signal KARAOKE AND VCD( , )

YES YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

AAB

B

KARAOKE AUDIO.

IC210 Pin 49 input check?

IC101 defective.
IC101 Pin 11 defective.

IC201 Pin 17 RESET check?

RESET surrounding circuity
defective.

IC211 DATA LINE
ADRS LINE check?

defective

IC211 Pin39, 41, 42 output
check?

IC212 Pin 3, 6,10 input
check?

IC301 Pin 1, 2, 3 input check?

IC301 defective.

IC212 defective.

IC210 defective.

IC101 defective.

IC211 defective.

OK

IC301 defective.

IC301 Pin 14, 16 output?

IC208 defective.

IC208 Pin 107, 108, 109
output?

VCD AUDIO.

IC212 Pin 1 input check?

OFF ON

VCD KARAOKE

3. VIDEO PART

- 20 -

YES

YES

NO

NO

NO

5V

PICTURE DEFECTIVE.

COLOR DEFECTIVE.

3-2

3-2

PICTURE DEFECTIVE.

IC209 Pin52 ÒRSTBÓ check?

IC209 ÒRGBÓ input check?

IC209 defective.

OK

IC208 defective.

IC101 defective.

IC106 defective.

IC106 Pin 11 check?

3-1

3-1

- 21 -

YES

NO

5V

COLOR DEFECTIVE.

R231 check?

R231

IC209 defective.

R231 defective.

OK

3-2