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Model
HCD-DP900D MHC-DP900D
Pages
89
Size
8.41 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-dp900d-mhc-dp900d.pdf
Date

Sony HCD-DP900D / MHC-DP900D Service Manual ▷ View online

13
HCD-DP900D
[Cold Reset]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Press three buttons  x  ,  DISPLAY  , and  DISC 1
simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[Tuner Step Change] (Except for European and Middle Eastern
models)
• A step of AM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
1. Press  `/1  button to turn the set ON.
2. Select the function “TUNER”, and press  TUNER/BAND  button
to select the BAND “AM”.
3. Press   `/1  button to turn the set OFF.
4. Press  ENTER  and   `/1  buttons simultaneously, and the
display of fluorescent indicator tube changes to “AM 9 k STEP”
or “AM 10 k STEP”, and thus the channel step is changed over.
[MD/VIDEO Function Change]
• Change of function MD or VIDEO ( also the input level changes).
Procedure:
1. Press   `/1  button to turn the set ON.
2. Press  MD (VIDEO)  and   `/1  buttons simultaneously, and
the display of fluorescent indicator tube changes to “MD” or
“VIDEO”, and thus the channel step is changed over.
3. Press  `/1  button to turn the set OFF.
[GC Test  Mode]
• This mode is used to check the software version, FL tube, LED,
keyboard and VACS.
Procedure:
1. Press three buttons   x  ,  DISPLAY , and  DISC 2
simultaneously.
2. LEDs and fluorescent indicator tube are all turned on.
3. When you want to enter the software version display mode,
press  DISC 1 .The model number and destination are displayed.
4. Each time  DISC 1  is pressed, the display changes stating from
MC version, GC version, DVD version, CDDM, CDMA,
CDMB, BDA, BDB version,  ST version, TA version, TM
version, TC version, in this order, and returns to the model
number and destination display.
5. When  DISC 3  is pressed while the version numbers are being
displayed except model number and destination, year, month
and day of the software creation appear. When  DISC 3  is pressed
again, the display returns to the software version display. When
DISC 1  is pressed while year, month and day of the software
creation are being displayed, the year, month and day of creation
of the software versions are displayed in the same order of
version display.
6. Press  DISC 2  button, and the key check mode is activated.
7. In the key check mode, the fluorescent indicator tube displays
“KOJOVO”. Each time a button is pressed, “KEY” value
increases.
However, once a button is pressed, _it is no longer taken into
account.
“VOL” value increases like 1, 2, 3...if rotating VOLUME knob
in “+” direction, or it decreases like 0, 9, 8...if rotating in
“_”direction.
8. Also when  DISC 3  is pressed after lighting of all LEDs and FL
tubes, value of VACS appears.
9. To exit from this mode, press three buttons in the same manner
as step 1, or disconnect the power cord.
SECTION 3
TEST MODE
[MC Test  Mode]
• This mode is used to check operations of the respective sections
of Amplifier, Tuner, and Tape.
Procedure:
• To enter MC Test Mode
1. Press  `/1  button to turn on the set.
2. Press three buttons of  x  ,  DISPLAY  and  DISC 3
simultaneously.
3. Cursor segment flash on the FL display tube. The input
FUNCTION is changed to GAME.
* Check of Amplifier
Initial settings: Input
, GAME
EQ
, FLAT
Mode
, MUSIC
VA CS
, OFF
Output channel switching:
MUSIC key: L
,  L
, R through
MOVIE key: L
, SL
, SR through
GAME key:L
, L, SL, C R , R, SR, SW through
TOOL MODE key: L 
,  C
, SW through
1. When  VOLUME  control knob is turned clockwise even slightly,
the sound volume increases to is maximum and a message
“VOLUME MAX” appears for two seconds, then the display
returns to the original display.
2. When  VOLUME  control knob is tuned counter-clockwise even
slightly, the sound volume decreases to its minimum and a
message “VOLUME MIN” appears for two seconds, then the
display returns to the original display.
* Tuner function
1. In the test mode, the default-preset channel is called even when
the TUNER is selected and an attempt is made to call the preset
channel that has been stored in memory. (It means that the
memory is cleared.)
2. The minimum, center and maximum frequency of each band is
set then.
* Tape recording test
1. To enter the MC Test Mode.
2. Load tapes in both tape decks A and B.
3. Press the REC button to start recording.
4. Pressing  M  ,  m  buttons during recording returns the tape
to the recording start position and stops it at this position.
5. Pressing the “High Speed Dubbing” key while playing back the
tape of deck B switches the playback speed between “Normal
Speed” and “High Speed”.
Note:
When the playback direction of the tape is set to other than “ONY
WAY”, the restriction on the number of times playback which can
be repeated will be cleared.
* AMS Test Mode
1. Set TAPE function
2. Select the desired loop by pressing  PLAY MODE  button.
Insert a test tape AMS-110A or AMS-120 to Deck A.
3. Press  SPECTRUM  or  KARAOKE PON  button to enter the
AMS test mode.
4. After a tape is rewound first, the FF AMS is checked, and the
mechanism is shut off after detecting the AMS signal the AMS
signal twice.
5. Then the REW AMS is checked and the mechanism is shut off
after detecting the AMS signal twice.
6. When the check is complete, a message of either OK or NG
appears.
* To return to normal mode again.
1. When you want to exit this mode, press  `/1  button.
2. The cold reset is enforced at the same time.
14
HCD-DP900D
[Tape Deck Section]
• The sequence during the aging mode is following as below.
• If an error occurred, stop display that step.
Aging mode sequence (Tape deck section):
[Aging Mode]
This mode can for operation check of tape deck section and DVD
section.
• If an error occurred:
 The aging operation stops and display then status.
• If no error occurs:
The aging operation continues repeatedly.
Procedure:
1. Press  DVD  button to select the function “DVD”.
2. Load the tapes into the decks A and B respectively.
3. Set a disk in “DISK1” tray.
4. Press  PLAY MODE  button to set the “ALL DISCS” mode,
and press the  REPEAT  button to “REPEAT” off.
5. Press three buttons of  x  ,  ENTER , and  DISC SKIP/EX-
CHANGE  simultaneously.
6. The aging mode is activated, if the indicator of DOLBY NR is
blinking.
7. To exit from the aging mode, operate the cold reset.
FWD play the tape A
“TAPE A AG-2”
Fast forward the tape A
“TAPE A AG-3”
RVS play the tape A
“TAPE A AG-4”
Rewind the tape A
“TAPE A AG-5”
FWD play the tape B
“TAPE B AG-2”
Rewind the tape A and B
“TAPE A AG-1”
Fast forward the tape B
“TAPE B AG-3”
RVS play the tape B
“TAPE B AG-4”
Rewind the tape B
“TAPE B AG-5”
Shut off
2 minutes
Shut off or 20 seconds
2 minutes
Shut off
2 minutes
Shut off or 20 seconds
2 minutes
Shut off
15
HCD-DP900D
2. CDM Error History <CDM58D Error History Display>
11 digits are displayed after the M character.
Example of display : M0FF400220000
1st digit
: Indicates the error history number.
0 is the latest error
2nd to 3rd digits
: Indicates the details of the problem.
01 : Initialization table is currently rotating 1
02 : Initialization table is currently rotating 2
03 : Initialization table is currently rotating 3
04 : Currently DISC SKIP in OPEN mode
05 : CLOSE table is currently rotating
06 : Chucking table is currently rotating
07 : Currently performing SHIP operations
08 : Currently performing release operations
09 : Currently performing POWER OFF
operations
4th to 5th digits
: Processing when problems occur
01 : Currently performing SHIP operations
02 : Currently performing POWER OFF
operations
03 : Currently initializing
04 : Currently performing release operations
05 : Currently in chuck stop state
06 : Currently performing CLOSE operations
07 : Currently performing exchange CLOSE
operations
08 : Currently performing OPEN operations
09 : Currently performing OPEN POP UP
operations
0A: Currently performing exchange OPEN
operations
6 to 7th digits
: Operations currently performed for problems
which have occurred
8th to 9th digits
: Targets of processing when problems occur
Same as 4th to 5th digits
10th to 11th digits : Fixed at 00
[DVD and CD Ship Mode (No Memory Clear)]
• This mode moves the position to the position durable to vibra-
tion Use this mode when returning the set to the customer after
repair.
Procedure:
1. Press  `/1  button to turn the set ON.
2. Press three  DVD  button and  `/1  button simultaneously.
3. After the “STANBY” display blinks six times, a message
“LOCK” is displayed on the fluorescent indicator rube, and the
DVD ship mode is set.
[DVD and CD Ship Mode (Memory Clear)]
• This mode moves the pickup to the position durable to vibra-
tion. Use this mode when returning the set to the customer after
repair.
Procedure:
1. Press  `/1  button to turn the set ON.
2. Press three buttons  ENTER ,  DISC 1 , and  DVD  button
simultaneously.
3. After the “STANDBY” display blinks six times, a message
“LOCK” is displayed on the fluorescent indicator tube, and the
DVD ship mode is set.
[DVD Section]
• The sequence during the aging mode is following as below.
Aging mode sequence (DVD section):
Disc 1 Chucking
TOC Read
Tray Turn
2 seconds
Track 1 Play
Last Track Play
2 seconds
Error History Display
1. BD Error History Display
11 digits are displayed after the D character.
Example of display : D00209010100
1st digit
: Indicates the error history number.
0 is the latest error
2nd to 3rd digits
: Indicates details of the problem.
01
: Cannot focus
02
: GFS NG
03
: Start time over
04
: Focus deviates continuously
05
: Q code absent for some time
4th to 5th digits
: Processing when problems occur
01
: Currently SHIP processing
02
: Currently POWER OFF processing
03
: Currently initializing
04
: Currently stopping
05
: Currently STOP operation processing
06
: Currently start processing
07
: Currently TOC reading
08
: Currently searching
09
: Currently playing
0A
: Currently pausing
0B
: Currently PLAY manual searching
0C
: Currently PAUSE manual searching
6th to 7th digits
: Operations currently performed for problems
which have occurred
8th to 9th digits
: Rotation speed of DISC when problems occur
01
: x1 speed
02
: x2 speed
10th to 11th digits : Fixed at 00
16
HCD-DP900D
[VACS ON/OFF MODE]
• This mode is used to switch ON and OFF the VACS (Variable
Attenuation Control System).
Procedure:
Press three buttons  x  ,  ENTER  and  SPECTRUM  or  KARAOK
PON  simultaneously.
[REPEAT 5 LIMIT OFF MODE]
• This mode is used to enable infinite repetitions.
Normally, the number of repetitions allowed is 5.
Procedure:
1. Press   `/1  button to turn ON the power supply.
2. Set the function “DVD”.
3. Press three burtons  ENTER ,  DISC 3 , and  x  is simultaneously.
4. Infinite repetitions is enabled.
5. This state is maintained ( memorized ) until COLD RESET is
executed.
SECTION 4
MECHANICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads
pinch rollers
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
6.96 N • m to 14.02 N • m
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
9.80 N • m
100 g or more
(3.53 oz or more)
9.80 N • m
100 g or more
(3.53 oz or more)
Mode
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
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