PHILIPS DVD640/00
Service Manual

Diagnostic Software, Trouble Shooting and Test Instructions 5.3
5.3.1

DVD640 /xx1

5.

EN 17

Fault Finding Trees
No Operation

The player does not operate No OSD and FTD display No pix and sound

Put the Mains switch to ON

� Check Power supply +5V and +/-12V to the Mpeg board

NO
� �

Check supply voltages at connector 1202 Pin 1&3 è +5V è Pin 5 +12V Pin 7 è -12V Check / Replace cable connection to con 1202 Check / Replace Power Supply Unit

YES

Check Power supply +3V3 and +2V5 to IC 7101 board

NO

� �

Check / Replace safety resistor 3200 Check / Replace 3V3 regulator 7206 and transistor 7220

YES
ch1 ch2 RESET
1 T

Check RESET signal at pin 24 / 7101 and pin 12 / 7100

NO

� �

Check +5V supply to IC 7230 Check / Replace RESET IC 7230

2

YES
� � � � � Check +5V supply voltage to IC 7104 Check / Replace IC 7104 Check / Replace crystal 1153 Check / Replace C2140 and C2141 Check / Replace resistor 3145,3146,3147 3148 and 3150

2V / div DC 20ms / div

27MHz CLK ch1
Check 27MHz clk input at pin 105 /116 /117 of IC 7101

NO

1

YES
ch1
Check SDRAM CLK 108MHz at pin 38 / 7102 �

1V / div DC 50ns / div
SDRAM CLK
ch1:freq=108MHz

NO

� �

Check +3V3 supply voltage to IC 7102 Check / Replace resistors 3171 Check / Replace processor IC 7101
1

Note: There should be mechanical

YES
ch1

PM3380B

Fig A
T

1V / div DC 10ns / div

Measure waveform at pin 16 of Flash IC 7100 at Power-on and the waveform should look like in Fig A: � During initialization �waveform appear for 1 sec and go low for next 1 sec. � After start-up-continuous waveform.

1

1.00V / DC 200ms / div
�

Is the waveform present ?

NO

� � � � �

Check +3V3 supply voltage to IC 7100 Check / Replace jumper 4109 Check / Replace Flash IC 7100 Check HSYNC at pin 10 / 7301 Check +5VAV supply to IC 7301 Check / Replace Video DAC IC 7301

YES
� Check / Replace processor IC 7101
CL 26532068_024.eps 100702

Figure 5-1 No operation