DOWNLOAD Sony HCD-GRX90AV / HCD-RXD10AV / MHC-GRX90AV Service Manual ↓ Size: 7.98 MB | Pages: 74 in PDF or view online for FREE

Model
HCD-GRX90AV HCD-RXD10AV MHC-GRX90AV
Pages
74
Size
7.98 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / S/M HCD-GRX90AV/RXD10AV ''99 US
File
hcd-grx90av-hcd-rxd10av-mhc-grx90av.pdf
Date

Sony HCD-GRX90AV / HCD-RXD10AV / MHC-GRX90AV Service Manual ▷ View online

– 9 –
3-3. CASSETTE LID AND TAPE MECHANISM
3-4. CD SW BOARD AND PANEL BOARD
1
 Release
3
 Cassette holder (R)
     assembly
4
 Cassette holder (L)
     assembly
Portion 
A
Portion 
A
5
 Extension spring
7
 Two screws
     (BVTP2.6x8)
8
 Three screws
     (BVTP2.6x8)
9
 Tape mechanism
6
 Extension spring
2
 Release
Portion 
B
Portion 
B
Note for installation
4
 
Knob (Jog)
5
 
Knob (Vol)
9
 
Four screws
     (BVTP2.6x8)
3
 
CD SW board
0
 
Six screws
     (BVTP2.6x8)
 
Four screws
     (BVTP2.6x8)
!™
 
Panel board
2
 
Three screws
     (BVTP2.6x8)
8
 
Flat type wire
     (CN601)
1
 
Three screws
     (BVTP2.6x8)
7
 
Nut
6
 
Nut
– 10 –
3-5. DISC TRAY
(Perform after removing the front panel.)
Note:When installing the Disc tray, pull around the flat type wire to
         pass through the claw 
A
 and claw 
B
, as shown in the figure.
Claw 
B
Claw 
A
1
 
Turn the cam the
     direction of arrow.
2
 
Pull-out the disc tray.
5
 
Remove the disc tray.
4
 
Two claws
3
 
Flat type wire  (8 core)
– 11 –
SECTION  4
SERVICE MODE
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  
p  ,  ENTER/NEXT  , and  1/u  simultaneously.
2. “COLD RESET” is displayed on the fluorescent display tube and reset is executed.
CD Delivery Mode
• This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.
Procedure:
1. Press  
1/u  button to turn the set ON.
2. Press  LOOP  button and  
1/u  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  
p  ,  ENTER/NEXT  , and  DISC 1  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 pick-up.
Procedure:
1. Press  
1/u  button to turn the set ON.
2. Press three buttons  
p  ,  ENTER/NEXT  , and  §  simultaneously.
3. The Sled Servo mode is selected, if “CD” is blanking on the fluorescent indicator tube.
4. With the CD in stop status, When the  
0 AMS )  knob is rotated in the clockwise direction, the optical pick-up moves outside. When
rotated counterclockwise, it moves inside.
5. To exit from this mode, perform as follows:
1) Move the optical pick-up to the most inside track.
2) Execute MC cold reset. (Press the three buttons  
p  ,  ENTER/NEXT  , and  1/u  button simultaneously.)
Note:
• Always move the pick-up 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 AM Tuner Step between 9kHz and 10kHz
• A step of AM channels can be changed over between 9kHz and 10kHz.
Procedure:
1. Press  
1/u  button to turn the set ON.
2. Select the function “TUNER”, and press  TUNER/BAND  button to select the BAND “AM”.
3. Press  
1/u  button to turn the set OFF.
4. Press  ENTER/NEXT  and  
1/u  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  
p  ,  ENTER/NEXT  , and  DISC 2  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 0 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  
0 AMS )  knob in “+”  direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction.
“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.
– 12 –
AMS Test  Mode
• This mode is used for checking the AMS operations of the tape deck.
JIG
7-819-039-12 Alignment tape, AMS-110A
Procedure:
1. Press the  
1/u  button to turn the unit ON.
2. Set the tape (AMS-110A).
3. Press the three buttons  
p  ,  ENTER/NEXT  , and  DISC 3  button simultaneously.
4. “TEST MODE” is displayed on the fluorescent display tube.
5. Press the  FUNCTION  button and switch the function to the deck with the tape (AMS-110A).
6. Press the  CD SYNC  button. “AMS CHECK” is displayed on the fluorescent display tube and the tape is rewound.
7. AMS starts in the normal direction. If the AMS count is 2 at shut down, proceed to step 8.
“NG” is displayed at other times, and the deck stops.
8. AMS starts in the opposite direction. If the AMS count is 2 at shut down again, “OK” is displayed.
“NG” is displayed at other times.
Note: The  
p  button of CD section will become effective and the aging of CD section will stop sometime, if the buttons described in step 3
are not pressed simultaneously. In that case, press  
^  button and operate the CD section.
Aging Mode
During the aging mode, both the CD player and tape deck are executed together.
• If an error occurs:
Aging stops, and the error state is displayed on the fluorescent display tube.
• If no error occurs:
Aging is repeated.
Procedure:
1. Press the  
1/u  button to turn the unit ON.
2. Load 10 minute tapes with unbent rec-proof tabs in decks A and B.
3. Set CD on the DISC 1 table.
4. Set the CD mode REPEAT to OFF and PLAY MODE to ALL DISCS.
(Press the  PLAY MODE/DOLBY NR  and  REPEAT/STEREO/MONO  buttons to set these modes.)
5. Press the  FUNCTION  button to switch the function to “CD”.
6. Press the three buttons  
p  ,  ENTER/NEXT  , and  DISC SKIP/EX-CHANGE  button simultaneously.
7. Aging starts.
8. To end aging, press the  
1/u  button to turn the unit OFF.
Aging Sequence:
Aging is performed in the following sequence.
• Tape Deck
1. The tape in deck A is rewound. “TAPE A AG-1” is displayed.
2. The FWD side of deck A is played for two minutes.
“TAPE A AG-2” is displayed.
3. The tape in deck A is fast forwarded. “TAPE A AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.
4. The RVS side of deck A is played for two minutes.
“TAPE A AG-4” is displayed.
5. The tape in deck A is rewound. “TAPE A AG-5” is displayed.
6. The FWD side of deck B is played for two minutes.
“TAPE B AG-2” is displayed.
7. The tape in deck B is fast forwarded. “TAPE B AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.
8. The RVS side of deck B is played for two minutes.
“TAPE B AG-4” is displayed.
9. The tape in deck A is rewound. “TAPE A AG-5” is displayed.
10. Repeated from step 2.
• CD
1. The tray rotates.
2. DISC 1 is chucked.
3. The TOC is read.
4. The first track is played for 2 seconds.
5. The last track is played for 2 seconds.
6. Repeated from step 1.
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