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7.1.2 TROUBLE SHOOTING
• No Power ON
• TFT is not turned ON
• LCD indication is unusual
START
No
Is TFT turn ON ?
Yes
Is the indication
of LCD normal ?
Yes
Does the spindle
motor turn ?
Yes
Do the video and
sound come on ?
Yes
OK
POWER ON
• Check DC voltage of DC9V (PDVDM Assy TP14), input check
• PDVDM Assy : Open D91 and check F11
• Check each voltage (PDVDM Assy)
V+5A (TP16), V5DR (TP17), V+5S (TP18), V+5V (TP19),
V+5D (TP20), V+3D (TP21), V2R5 (TP22)
If above voltage are not supplied, check the transistors.
TP16, TP17 = Q23, TP18, TP19, TP20 = Q24, TP21 = Q25, TP22 = Q26
• Check the connection between CN602 of PDVDM Assy and CN2001
of PDVDS Assy
No
• Check each voltage
PDVDM Assy V+3D (TP636)
PDVDS Assy IC2001-pin 66, CN2001-pin 43, pin 44 (V+3S)
• Check the connection between CN1 of Traverse Mechanism Assy and
CN120 of PDVDM Assy
No
• Check the voltage of PDVDM Assy V+5S
• Check the voltage of VCC of PDVDM Assy TP125, TP139, TP140
No
Check the connection between CN401 of PDVDM Assy and B1 of LCD Main.
PDV-LC20, PDV-20
43
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