Sony HCD-CP505 Service Manual page 11

Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF
BD BOARD) ARE REPLACED
The Iop value labeled on the optical pick-up can be stored in the non-volatile memory. By storing the value, it will eliminate the need to look
at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD (MD) board), store
the Iop value on the optical pick-up according to the following procedure.
Record Precedure:
1. Press the ?/1 button to turn on the power.
2. Press the FUNCTION button to select the "MD" function.
3. While pressing the x button and the ENTER/START button at the same time, press the FUNCTION button.
4. Press the "R" button to display "[Service]". Then press the ENTER/YES "R" button.
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5. Press the > "R" button to display "Iop Write" (C05) and press the ENTER/YES "R" button.
6. The display becomes "Ref=@@@.@" (@ is an arbitrary number) and the numbers which can be changed will blink.
7. Input the Iop value written on the optical pick-up.
To select the number : Press the
To select the digit : Press the REC MODE button.
8. When the ENTER/YES "R" button is pressed, the display becomes "Measu=@@@.@" (@ is an arbitrary number).
9. As the adjustment results are stored for the 6 value. Leave it as it is and press the ENTER/YES "R" button.
10. "Complete!" will be displayed momentarily. The value will be stored in the non-volatile memory and the display will become "Iop
Write" (C05).
11. Press the REPEAT "R" button to exit the mode.
12. Press the ?/ 1 button to turn off the power.
Display Precedure:
1. Press the ?/1 button to turn on the power.
2. Press the FUNCTION button to select the "MD" function.
3. While pressing the x button and the ENTER/START button at the same time, press the FUNCTION button.
4. Press the "R" button to display "[Service]". Then press the ENTER/YES "R" button.
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5. Press the "R" button to display "Iop Read" (C26) and press the ENTER/YES "R" button.
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6. "@@.@/##.#" is displayed and the recorded contents are displayed.
@@.@ : indicates the Iop value labeled on the optical pick-up
##.# : indicates the Iop value after adjustment
7. To end, press the MENU/NO "R" button to display "Iop Read" (C26). Then press the REPEAT "R" button.
8. Press the ?/1 button to turn off the power.
Checks Prior to Parts Replacement and Adjustments in MD
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent.
Details of the procedures are described in "Section 5 Electrical Adjustments".
Criteria for Determination
(Unsatisfactory if specified value is not satisfied)
Laser power check • 0.93 mW power
(6-2 : See page 34)
• 8.65 mW power
• Iop (at 8.65 mW)
Auto check • Unsatisfactory if displayed as "NG : XXXX"NG
(6-4 : See page 35)
Temperature
• Unsatisfactory if displayed as "T=@@ (##) [NG]"
compensation
offset check
(6-1 : See page 34)
Note:
The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.
When performing adjustments, use the specified values for adjustments.
. "R" button or the
Specified value : 0.84 to 0.92 mW (KMS-262A)
0.90 to 0.96 mW (KMS-262E)
Specified value : 8.1 to 8.7 mW (KMS-262A)
8.4 to 8.9 mW (KMS-262E)
Labeled on the optical pick-up
Iop value ± 10mA
(XXXX are arbitrary numbers)
NG
(@@, ## are both arbitrary numbers)
> "R" button.
• Clean the optical pick-up
• Adjust again
• Replace the optical pick-up
• Replace the optical pick-up
• Replace the optical pick-up
• Check for disconnection of the circuits around
D101 (BD (MD) board)
• Check the signals around IC101, IC151, CN102,
CN103 (BD (MD) board)
HCD-CP505
Measure if unsatisfactory
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