Electrical Check - Sony XAV-701BT Service Manual

XAV-701BT/741

3. ELECTRICAL CHECK

If any of the following parts was replaced, perform the "IOP
Check" as mentioned below.
• Optical pick-up block (chassis (OP, 614) complete assy)
• Complete SERVO board
Precaution
Use the following tools and measuring devices.
• DVD test disc TDV-540C (Part No. J-2501-235-A)
• CD test disc PATD-012 (Part No. 4-225-203-01)
• Digital voltmeter
• Accessory remote commander RM-X271
Note: This adjustment can be operated even if it is remote commander
which is not attached remote commander.
IOP CHECK
Connection:
SERVO board
TP51 (IOPDVD), TP47 (IOPCD)
TP63 (D3.3V)
Procedure:
1. Check the IOP value of DVD and CD by label on the OP fl ex-
ible board.
Optical Pick-up Label:
DVD IOP value CD IOP value
2. Connect a digital voltmeter to TP51 (IOPDVD) and TP63
(D3.3V) 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 ± 2 mA to the IOP
value given on the label.
6. Connect a digital voltmeter to TP47 (IOPCD) and TP63
(D3.3V) 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 ± 2 mA to the IOP
value given on the label.
8
digital voltmeter
+
–
********
********
$$##****
Check Location:
– SERVO Board (Side B) –
TP51
(IOPDVD)
TP63
(D3.3V)
TP47
(IOPCD)