MEX-DV1500U, MEX-DV1505U, MEX-DV150UE - Sony Car Audio Service Manual (repair manual). Page 16

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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) –

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