MEX-DV150UE/DV1500U/DV1505U
16
SECTION 4
ELECTRICAL CHECK
If any of the following parts was replaced, perform the “IOP
Check” as mentioned below.
• Optical pick-up block (chassis (OP, ZA) complete assy
• Mounted SERVO board
Precaution
Use the following tools and measuring devices.
• Extension jig (Part No. J-2502-062-1) between the SERVO
board and the MAIN board
• DVD test disc TDV-540C (Part No. J-2501-235-A)
• CD test disc PATD-012 (Part No. 4-225-203-01)
• Driver for adjustment
• TV
moniter
• Digital
voltmeter
• Oscilloscope
• Accessory remote commander RM-X168
IOP CHECK
Connection:
SERVO board
TP51 (IOPDVD), TP47 (IOPCD)
TP63 (A3.3V)
+
–
digital voltmeter
Procedure:
1. Check the IOP value of DVD and CD by label on the optical
pick-up.
DVD IOP value
CD IOP value
Optical Pick-up Label:
"
2. Connect a digital voltmeter to TP51 (IOPDVD) and TP63
(A3.3V) on the SERVO board.
3. Playback the DVD test disc (TDV-540C), and make a note of
the value of digital voltmeter.
4. Divide the measured voltage value by 1, and convert it into
current value.
5. Check that the calculated value is within ±6 mA to the IOP
value given on the label.
6. Connect a digital voltmeter to TP47 (IOPCD) and TP63
(A3.3V) on the SERVO board.
7. Playback the CD test disc (PATD-012), and make a note of the
value of digital voltmeter.
8. Divide the measured voltage value by 1, and convert it into
current value.
9. Check that the calculated value is within ±6 mA to the IOP
value given on the label.
SERVO SECTION
Check Location:
TP63
(A3.3V)
TP51
(IOPDVD)
TP47
(IOPCD)
– SERVO Board (Conductor Side) –
