DOWNLOAD Sony HCD-GR8 / HCD-RX90 / MHC-GR8 / MHC-RX90 Service Manual ↓ Size: 10.78 MB | Pages: 97 in PDF or view online for FREE

Model
HCD-GR8 HCD-RX90 MHC-GR8 MHC-RX90
Pages
97
Size
10.78 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / S/M HCD-GR8/RX90 97 QEP UK E
File
hcd-gr8-hcd-rx90-mhc-gr8-mhc-rx90.pdf
Date

Sony HCD-GR8 / HCD-RX90 / MHC-GR8 / MHC-RX90 Service Manual ▷ View online

– 29 –
BD  BOARD
4
flat wire
(CN101)
5
screw
(BVTP 2.6 
×
 8)
6
Removal
the four solders.
7
BD board
1
two screws
(PTPWH M2.6 
×
 6)
1
two screws
(PTPWH M2.6 
×
 6)
2
optical pick-up
section
3
two springs
limit switch
OPTICAL  PICK-UP,  SLED  MOTOR
1
claw
2
sled shaft
3
optical pick-up
3
two springs
4
two screws
(P 2 
×
 3)
5
sled motor
– 30 –
AUDIO  BOARD
CAPSTAN  MOTOR
5
AUDIO board
4
four screws
(BTP 2.6 
×
 4)
1
connector
(CN651)
1
Break the soldering of
motor lead.
4
Removal the capstan motor
to direction of the arrow.
2
two screws
(BTP 2.6 
×
 8)
3
claw
5
Hang the
two belts.
2
two rivets
3
Break the soldering of two
flexible flat cables.
– 31 –
[MC 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 SPECTRUM  ANALYZER ,
ENTER/NEXT , and DISC 1 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[CD Delivery Mode]
This mode moves the pickup to the position durable to vibration.
Use this mode when returning the set to the customer after repair.
Procedure:
1. Press POWER button to turn the set ON.
2. Press PLAY button and POWER button simultaneously.
3. A message “LOCK” is displayed on the fluorescent indicator
tube, and the CD delivery mode is set.
[MC Hot Reset]
This mode resets the set with the preset data kept stored in the
memory.  The hot reset mode functions same as if the power cord
is plugged in and out.
Procedure:
1. Press three buttons SPECTRUM  ANALYZER ,
ENTER/NEXT , and DISC 2 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[Sled Servo Mode]
This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.
Procedure:
1. Select the function “CD”.
2. Press three buttons SPECTRUM  ANALYZER ,
ENTER/NEXT , and FUNCTION simultaneously.
3. The Sled Servo mode is selected, if “CD” is blanking on the
fluorescent indicator tube.
4. With the CD in stop status, press
) button in CD section to
move the pickup to outside track, or
0 button to inside track.
5. To exit from this mode, perform as follows:
1) Move the pickup to the most inside track.
2) Press three buttons in the same manner as step 2.
Note:
Always move the pickup to most inside track when exiting from
this mode.  Otherwise, a disc will not be unloaded.
Do not run the sled motor excessively, otherwise the gear can be
chipped.
[Change-over of FUNCTION Name]
The FUNCTION name of external input terminal can be changed
over to VIDEO or MD.
Procedure:
1. Press POWER button to turn the set OFF.
2. Press POWER button together with FUNCTION button, and
the power is turned on, the display of fluorescent indicator tube
changes to “MD” or “VIDEO” instantaneously, and thus the
FUNCTION is changed over.
SECTION  3
TEST  MODE
[Change-over of AM Tuner Step between 9kHz and 10kHz]
A step of AM channels can be changed over between 9kHz and
10kHz.
Procedure:
1. Press POWER button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND
button to select the BAND “AM”.
3. Press POWER button to turn the set OFF.
4. Press ENTER/NEXT and POWER buttons simultaneously,
and the display of  fluorescent indicator tube changes to “AM
9k STEP” or “AM 10k STEP”, and thus the channel step is
changed over.
[LED and Fluorescent Indicator Tube All Lit, Key Check
Mode]
Procedure:
1. Press three buttons SPECTRUM ANALYZER ,
ENTER/NEXT , and DISC 3 simultaneously.
2. LEDs and fluorescent indicator tube are all turned on.
Press DISC 2 button, and the key check mode is activated.
3. In the key check mode, the fluorescent indicator tube displays
“K 1 V0 J0”.  Each time a button is pressed, “K”value increases.
However, once a button is pressed, it is no longer taken into
account.
“J” value increases like 1, 2, 3 ... if rotating JOG knob in “+”
direction, or it decreases like 0, 9, 8 ... if rotating in “–” direc-
tion.
“V” value increases like 1, 2, 3 ... if rotating VOLUME knob
in “+”  direction, or it decreases like 0, 9, 8 ... if rotating in “–”
direction.
4. To exit from this mode, press three buttons in the same manner
as step 1, or disconnect the power cord.
– 32 –
7. In the aging mode, the aging is executed in a sequence given
in “2-2.  Operation during Aging Mode”.
The aging continues unless an alarm occurred.
8. To exit from the aging mode, press POWER button to turn
the set OFF.
2-2.  Operation during Aging Mode
In the aging mode, the program is executed in the following se-
quence.
1. A tape on FWD side is played for one minute.
2. PAUSE STOP is made.
3. Recording is made for 3 minutes. (For the deck not having
the record function, the play is executed.  In this case,
·
LED does not light up.)
4. FF is executed up to the end of tape.
5. A tape is reversed, and the tape on REV side is played for
one minute.
6. PAUSE STOP is made.
7. Recording is made for 3 minutes.  (For the deck not having
the record function, the play is executed.  In this case,
ª
LED does not light up.)
8. FF is executed up to the end of tape.
9. Steps 1 through 8 are executed for the other deck.
10. Steps 1 through 9 are repeated unless an alarm occurred.
2-3.  Deck Selection Sequence
During the aging mode, decks are selected in the following se-
quence:
Deck A (FWD) 
 Deck A (REV)
Deck B (REV) 
 Deck B (FWD)
[Aging Mode]
This mode can be used for operation check of CD section and tape
deck section.
If an error occurred:
The aging operation stops.
If no error occurs:
The aging operation continues repeatedly.
1. Aging Mode in CD Section
1-1.  Operating Method of Aging Mode
1. Set discs in DISC1 and DISC2 trays.
2. Select the function “CD”.
3. Press three buttons SPECTRUM ANALYZER ,
ENTER/NEXT , and KARAOKE PON/MPX  simulta-
neously.
4. The aging mode is activated, if a roulette mark on the fluo-
rescent indicator tube is blinking.
5. In the aging mode, the aging is executed in a sequence given
in “1-2. Operation during Aging Mode”.
The aging continues unless an alarm occurred.
6. To exit from the aging mode, press POWER button to turn
the set OFF.
If a button other than buttons In CD section is pressed during
aging, the aging in the CD section is finished.
To execute aging to the tape deck section successively, press
·
button in the deck A.
“AGING” is displayed on the fluorescent indicator tube.  (For the
aging in tape deck, see “2. Aging Mode in Tape Deck Section”.
1-2.  Operation during aging Mode
In the aging mode, the program is executed in the following se-
quence.
1. The disc table is ejected.
2. The disc tray turns to select a disc. (For a disc selection
sequence, see Section 1-3.)
3. TOC of disc is read.
4. The pickup accesses to the last track.
5. A disc is ejected.
6. Steps 2 through 5 are repeated.
1-3.  Disc Selection Sequence
During the aging mode, discs are selected in the following se-
quence:
Disc 1 
 Disc 2
 
Disc 2 
 Disc 1
2. Aging Mode in Tape Deck Section
2-1.  Operating Method of Aging Mode
1. Load a commercially available 10-minute tape into the decks
A and B respectively.
(If a 10-minute tape is not available, another tape may be
used but a cycle time will be longer.)
2. Select the function “TAPE”.
3. Rewind tapes in advance by pressing
0 button respec-
tively on decks A and B.
4. Press three buttons SPECTRUM  ANALYZER ,
ENTER/NEXT , and KARAOKE PON/MPX  simulta-
neously.
5. Press
· button on deck A.  (This button triggers the ag-
ing mode.)
6. The aging mode is activated if “AGING A” is displayed on
the fluorescent indicator tube.
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