32
HCD-CP500K/CP500MD
6-4. Auto Check
This test mode performs CREC and CPLAY automatically for
mainly checking the characteristics of the optical pick-up. To perform
this test mode, the laser power must first be checked. Perform Auto
Check after the laser power check and Iop compare.
Procedure:
1. Press the
.
“R”
or
>
“R”
button to display “AUTO
CHECK” (C01).
2. Press the
ENTER/YES “R”
button. If “LDPWR
” is
displayed, it means that the laser power check has not been
performed. In this case, perform the laser power check and Iop
Compare, and then repeat from enter the MD test mode.
3. If a disc is in the mechanical deck, it will be ejected forcibly.
“DISC IN” will be displayed in this case. Load a test disc (MDW-
74/GA-1) which can be recorded.
4. If a disc is loaded at step 3, the check will start automatically.
5. When “XX CHECK” is displayed, the item corresponding to
XX will be performed.
When “06 CHECK” completes, the disc loaded at step 3 will be
ejected. “DISC IN” will be displayed. Load the check disc
(TDYS-1).
6. When the disc is loaded in the step 5, the check will automatically
be resumed from “07 CHECK”.
7. After completing to “0C CHECK” of test item 12, check OK or
NG will be displayed. If all items are OK, “CHK ALL OK” will
be displayed. If any item is NG, it will be displayed as
“NG:xxxx”.
When “CHK ALL OK” is displayed, it means that the optical pick-
up is normal. Check the operations of other parts (spindle motor,
sled motor, etc.).
When displayed as “NG:xxxx”, it means that the optical pick-up is
faulty. In this case, replace the optical pick-up.
6-5. Other Checks
All the following checks are performed by the Auto Check mode.
They therefore need not be performed in normal operation.
6-6. Traverse Check
6-7. Focus Bias Check
6-8. C PLAY Check
6-9. Self-Recording/Playback Check
6-6. Traverse Check
Connection:
Procedure:
1. Connect an oscilloscope to CN105 pin
4
(TE) and CN105 pin
6
(VC) on the BD (MD) board.
2. Load a disc (any available on the market). (Refer to Note 1)
3. Press the
M
“R”
button to move the optical pick-up outside
the pit.
4. Press the
.
“R”
or
>
“R”
button to display “EF MO
CHECK”(C14).
5. Press the
ENTER/YES “R”
button to display “EFB =
MO-
R”.
(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)
6. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not press the
.
“R”
or
>
“R”
button.
(Read power traverse checking)
Traverse Waveform
7. Press the
ENTER/YES “R”
button to display “EFB =
MO-
W”.
8. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not press the
.
“R”
or
>
“R”
button.
(Write power traverse checking)
Traverse Waveform
Note 1:
Data will be erased during MO reading if a recorded disc is
used in this adjustment.
Note 2:
If the traverse waveform is not clear, connect the oscilloscope
as shown in the following figure so that it can be seen more
clearly.
+
–
oscilloscope
(DC range)
10 pF
330 k
Ω
CN105 pin
4
(TE)
CN105 pin
6
(VC)
BD (MD) board
A
B
VC
Specified value : Below 10% offset value
Offset value (%) = X 100
I
A – BI
2 (A + B)
A
B
VC
Specified value : Below 10% offset value
Offset value (%) = X 100
I
A – BI
2 (A + B)
+
–
oscilloscope
(DC range)
V: 0.1 V/div
H: 10 ms/div
BD (MD) board
CN105 pin
4
(TE)
CN105 pin
6
(VC)
Содержание HCD-CP500K
Страница 7: ...7 HCD CP500K CP500MD SERVICE POSITION OF THE TAPE MECHANISM DECK Tape mechanism deck CN301 CN303 ...
Страница 39: ...39 HCD CP500K CP500MD MEMO ...
Страница 47: ...HCD CP500K CP500MD 47 47 7 4 SCHEMATIC DIAGRAM CD BOARD Page 52 ...
Страница 49: ...HCD CP500K CP500MD 49 49 7 6 SCHEMATIC DIAGRAM BD BOARD 1 2 Page 50 Page 50 Page 50 ...
Страница 50: ...HCD CP500K CP500MD 50 50 7 7 SCHEMATIC DIAGRAM BD BOARD 2 2 Page 49 Page 49 Page 49 Page 57 Page 57 ...
Страница 55: ...HCD CP500K CP500MD 55 55 7 12 SCHEMATIC DIAGRAM TC BOARD IC B D Page 52 ...
Страница 57: ...HCD CP500K CP500MD 57 57 7 14 SCHEMATIC DIAGRAM DIGITAL BOARD IC B D IC B D IC B D Page 50 Page 50 Page 52 ...
Страница 59: ...HCD CP500K CP500MD 59 59 7 16 SCHEMATIC DIAGRAM CONTROL SECTION Page 53 Page 52 Page 52 ...
Страница 93: ...93 HCD CP500K CP500MD MEMO ...