Sony HCD-J300 Service Manual page 26

HCD-J300
QQ
3 7 63 1515 0
11. WHEN MEMORY NG IS DISPLAYED
If the nonvolatile memory data is abnormal, "E001 MEMORY NG" will be displayed so that the MD deck does not continue operations. In
this case, set the test mode promptly and perform the following procedure.
Procedure:
1. Enter the MD test mode.
2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be
displayed "INIT EEP?".
3. Press the (MD) and Z (MD) buttons simultaneously.
x
4. Press the . "R" or > "R"
5. Press the REC MODE button. If the nonvolatile memory is successfully overwritten, the normal MD test mode will be set and a message
to select the MD test mode will be displayed.
12. 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 6 Electrical Adjustments".
Criteria for Determination
(Unsatisfactory if specified value is not satisfied)
Laser power check • 0.9 mW power
(6-2 : See page 32)
• 7.0 mW power
• Labeled on the optical pick-up
Auto check • Unsatisfactory if displayed as "NG : XXXX"NG
(6-7 : See page 33)
Temperature • Unsatisfactory if displayed as "T=@@ (##) [NG]"
TE
L 13942296513
compensation
offset check
(6-1 : See page 32)
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.
Figure1:
KMS-260B
SPECIFIED VALUE
KMS-260E
Figure2:
KMS-260B
SPECIFIED VALUE
KMS-260E
CD SECTION
[CD SERVO Test Mode]
• Use this mode when checking CD servo.
Procedure:
Press ?/1 button to turn the set ON.
1.
2. Select the function "CD".
3. Press three buttons M (TAPE), SYNCHRO REC and > (MD) simultaneously.
4. Press the appropriate button for the following tests.
www
Button Function Button
Z(CD)
TEST 1 PLAY MODE DIRECTION TEST 6
x(CD) TEST 2 u(CD)
> x(MD)
TEST 3
.
. x(TAPE)
TEST 4
REPEAT TEST 5
5. To exit from this mode, turn off the set.
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button to display "MDM-7B".
Specified value : figure1
Specified value : figure2
Iop (at 8.4mW)
Iop value ± 10mA
(XXXX are arbitrary numbers)
NG
(@@, ## are both arbitrary numbers)
0.85 to 0.91 mW
0.90 to 0.96 mW
6.8 to 7.2 mW
7.0 to 7.5 mW
Function
x ao
y
TEST 7
TEST 8
i
TEST 9
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8
Measure if unsatisfactory
• Clean the optical pick-up
• Adjust again
• Replace the optical pick-up
• Replace the optical pick-up
• Replace the optical pick-up
Q Q
• Check for disconnection of the circuits around
3 6 7 1 3
D101 (BD board)
• Check the signals around IC101, IC151, CN102,
CN103 (BD board)
u163
.
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9