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9. TroubleShooting
9-1 Main

Samsung Electronics

9-1

9-2

Samsung Electronics

Samsung Electronics

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Samsung Electronics

9-2 DVD Frontend parts
1. Initial operation after power ON
POWER ON

Is Tray closed?

N

Tray close operation. about 3sec.

Y
3

N Y
Is Tray closed?

Pick up head intial position.

4

Disc presence/absense judgement

Stop Close operation. Wait Open Command from MPEG

N Disc presence Y

Laser Off Monitor Display=NO DISC

CD or DVD judgement

DVD

CD

DVD single or Dual layer judgement

CD or CDRW judgement

Single
DVD single initial setting

Dual
DVD Dual initial setting

CD
CD initial setting

CDRW
CDRW initial setting

To Each disc playback

Samsung Electronics

9-5

2. Play operation
Play

5

Disc Motor forced accelleration

Repeat seveal times

Change Disc Type

Focus Seach

Is focus servo on?

6

Track servo ON

7

CLV servo ON

8

Automatic Adjustment Automatic Adjustment is done once when the disc is replaced

Read TOC

Search --> Picture appeares

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Samsung Electronics

3. PickUp Head Initial Postion
PickUp Head Initial Postion 1. Move Pick Up Head to inner diretion until pin5 of MJ4="L" 2. If pin5 of MJ4="L", then move Pick Up Head to outer diretion for a short time. 3. Ture On the Laser of Pick Up Head to judge that disc is presence or not.
3

Does Pick Up Move to inner direction?

N

Is pulse of 2.5 +-2.5V developed at pin3,4 of MJ4?

Y

Check connection between PCB and MECHA

N Check peripheral circuit of DU3 and MU9 Check BUS line between DU3 and DU5 Check connection between PCB and MECHA

Y

Is pulse of 2.5 +-2.5V developed at pin13 of DU3?

Y

N

Does Pick Up Move to out direction again? Y Does Laser Turn On? N

N

Is pin5 of MJ4 = "L" appeared? Y
Check line between DU3 and MJ4

N

OK

Check voltage at pin17 of RCN1 is about 2.5V? N
Check BUS line between RU1 and DU3,DU3 and DU5

Y
Replace Pick Up Head

Samsung Electronics

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4. Disc Presence/Absense Judgment
4

Disc Presence Judgment

Turn On Laser

Does lens move with UP/DOWN full stroke in focus direction?

N

Is focus search voltage developed at pin 11 of DU3?

Y

Check peripheral circuit of MU9 Check BUS line between DU3 and DU5

N Y

Does lens move with UP/DOWN full stroke in focus direction?

No signal

No Disc N

Y

OK

Normal

Check connection between RU1 and RCN1. Check BUS line RU1 and DU3. Check RU1

Disc is presence

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Samsung Electronics

5. Disc Motor Does Not Rotate
5

Disc Motor Does Not Rotate

Is Voltage of 0V developed at pin15 of DU3

Y

Check peripheral circuit of MU9

N Check peripheral circuit of DU3. Check DU3

6. Focus Servo does not Work
6

Focus Servo does not Work

Are FE(pin42 of RU1) and PI(pin36 of RU1) normal?

N

Check peripheral circuit of DU3 and RU1

Y Check peripheral circuit of DU3 and RU1 Check Connection between PCB and MECHA

Check peripheral circuit of MU9

Samsung Electronics

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7. Tracking Servo Does Not Work
7

Tracking Servo Does not Work

Check Voltage of PI(pin36 of RU1) is normal

N Disc Judgment Error

Y
Is TE(pin41 of RU1) normal?

N

Check peripheral circuit or RU1

Y Check peripheral circuit or RCN1 and MU9

Change PickUp or RU1

Change DU3

Check connection between PCB and MECHA

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Samsung Electronics

8. CLV Servo Does Not Work
8

CLV Servo Does not Work

Y
Is XSRFIN(pin2 of DU3) normal?

Check peripheral circuit of DU3

N

Check peripheral circuit of MU9 Y

Is RF(pin4 of RCN1) normal?

Check peripheral circuit of RU1

N

Check connection between PCB and MECHA

Samsung Electronics

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9-3 DVD Backend Parts
1. Initial operation after ON
POWER ON WAIT N
1

LOGO ON Y

N N

Check voltage 24pin connector Pin 23,24:3.3v / pin 19,20:5v

"NO DISC" DISPLAY (in time of absence)

N

Check 24pin connector Pin 1,2,3,4,5:5v

Y Check 40pin connector Pin 33,35,36 Fig,5,6,7 N Y Check connector between Loader PCB and Ziva5PCB

Loading (in time of presence)

N

Play

N

Check 10pin connector Video out: pin 2 ->Fig.8 S-video out: pin 3,4 ->Fig9,10

N

Check TR(D1Y)

OK

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

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Samsung Electronics

2. Logo operation

1

Check 13.5MHZ crystal Flg.1

Check ZIVA5 PIN150 Flg.4

Y Check 128MHZ ZIVA5 PIN56 Flg.2

Fig.1

Voltage 39VF800A IC Pin 13,37:3.3V

N Check ZIVA5 PIN 51 Flg.3

Y

Check data line between 39VF800A IC and ZIVA5

Fig.2

Fig.3

Fig.4

Samsung Electronics

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