DOWNLOAD Sony HCD-GN880 / MHC-GN880 Service Manual ↓ Size: 5.15 MB | Pages: 77 in PDF or view online for FREE

Model
HCD-GN880 MHC-GN880
Pages
77
Size
5.15 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-gn880-mhc-gn880.pdf
Date

Sony HCD-GN880 / MHC-GN880 Service Manual ▷ View online

17
HCD-GN880
* Check of Amplifier
1. Press  [EQ EDIT]  button repeatedly until a message “GEQ
MAX” appears on the fluorescent indicator tube. GEQ
increases to its maximum.
2. Press [EQ EDIT] button repeatedly until a message “GEQ MIN”
appears on the fluorescent indicator tube. GEQ increases to
its minimum.
3. Press  [EQ EDIT]  button repeatedly until a message “GEQ
FLAT” appears on the fluorescent indicator tube. GEQ set to
flat.
4. When the [VOLUME] knob is turned clockwise even slightly,
the sound volume increases to its maximum and a message
“VOLUME MAX” appears.
5. When the [VOLUME] knob is turned counter-clockwise even
slightly, the sound volume decreases to its minimum and a
message “VOLUME MIN” appears.
* Tape function
1. When a tape is inserted in Deck B and recording is started, the
function is changed to VIDEO automatically. When [CD SYNC]
button is pressed during recording in function, ALC (Automatic
Logic Control) is turned on.
2. During recording, turn 
M
m
  knob to counter clockwise
rotation will change the function to TAPE B and rewind Tape
B until the recording start position and playback of Tape B is
started. If the [REC PAUSE/ START]  button is pressed for a
pause and pressed again to resume recording during recording
time, when tape deck B is rewind, tape deck B will be rewind
until the position where the pause is applied.
* AMS Test Mode
1. Select the function “TAPE A” or “TAPE B”.
2. Select Loop or Relay direction mode by pressing the
[DIRECTION TUNER MEMORY] button. Insert a test tape AMS-
110A or AMS-120 to selected tape deck.
3. Press the [AMP MENU] button to enter the AMS test mode.
4. After the test tape is rewind to the beginning of the tape, the
AMS+ is checked, and the mechanism is shut off after detecting
the AMS signal twice.
5. Then the 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 release MC Test mode.
1. To release this mode, press 
?/1
 button.
2. The cold reset is enforced at the same time.
[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  x  button,  [ENTER]  button, and 
?/1
  button
simultaneously.
2. The fluorescent indicator tube becomes blank for a while, and
the set is reset.
[GC TEST  MODE]
• This mode is used to check the fluorescent indicator tube, LED,
model, destination, software version, volume, key jog, encoder
and VACS level.
Procedure:
1. Press x button, [ENTER] button and [DISC 2]  button
simultaneously.
2. All LEDs and segments in fluorescent indicator tube are lighted
up.
3. When you want to enter the software version display mode,
press [DISC 1] button. The model and destination are displayed.
4. Each time [DISC 1] button is pressed, the display changes from
MC version, GC version, CD version, CDDM version, CDMA
version, CDMB version, BDA version, BDB version, ST
version, TA version, TM version and TC version in this order,
and returns to the MC version display.
5. When [DISC 3] button is pressed while the version numbers
are being displayed except model and destination, the date of
the software creation appear. When [DISC 3] button is pressed
again, the display returns to the software version display. When
[DISC 1]  button is pressed while the date of the software
creation is being displayed, the date of the software creation
is displayed in the same order of software version display.
6. Press [DISC 2] button, the key check mode is activated.
7. In the key check mode, the fluorescent indicator tube displays
“K 0   J 0  V 0  E 0”.
Each time a button is pressed, “K” value increases. However,
once a button has been pressed, it is no longer taken into
account.
“J” value increases in the manner of 0,1, 2, 3 ... if [MULTI
JOG] knob is turned clockwise, or it decreases in the manner
of 0, 9, 8, 7 ... if [MULTI JOG] knob is turned counter-clockwise.
“V” value increases in the manner of 0,1, 2, 3 ... if [VOLUME]
knob is turned clockwise, or it decreases in the manner of 0,
9, 8, 7  ... if [VOLUME] knob is turned counter-clockwise.
“E” value increases in the manner of 0,1, 2, 3 ... if 
>
.
knob is turned clockwise, or it decreases in the manner of 0,
9, 8, 7 ... if 
>
.
 knob is turned counter-clockwise.
8. When [DISC 3] button is pressed after all LEDs and segments
in fluorescent indicator tube light up, the fluorescent indicator
tube displays “VACS A+B APCC”. A is VACS level which is
trigger by signal level, B is VACS level which is trigger by
temperature and CC is VACS level which is trigger by
APVACS (Abuse Protection VACS).
9. When  [EX-CHANGE/DISC SKIP]  button is pressed after all
LEDs and segments in fluorescent indicator tube light up,
alternate segments in fluorescent indicator tube would light
up. If you press [EX-CHANGE/DISC SKIP] button again, another
half of alternate segments in fluorescent indicator tube would
light up.  Pressing [EX-CHANGE/DISC SKIP]  button again
would case all segments lights up.
10. To release this mode, press three buttons in the same manner
as step 1, or disconnect the power cord.
[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 x button, [ENTER] button and [DISC 3] button
simultaneously.
2. The CD ring indicators TAPE A and TAPE B indicators flash
on the fluorescent indicator tube. The function is changed to
VIDEO.
SECTION 4
TEST MODE
18
HCD-GN880
[VACS ON/OFF]
• This mode is used to switch ON and OFF the VACS (Variable
Attenuation Control System).
Procedure:
1. Press 
?/1
 button to turn the set ON.
2. Press [ENTER] button and [GAME MIXING] button
simultaneously. The message “VACS OFF” or “VACS ON”
appears.
[TUNER STEP CHANGE]
• The step interval of AM channels can be toggled between 9
kHz and 10 kHz.
Procedure:
1. Press 
?/1
 button to turn the set ON.
2. Press [TUNER/BAND] button to select the “AM”.
3. Press 
?/1
 button to turn the set OFF.
4. Press [ENTER] button and 
?/1
 button simultaneously. The
system will turn ON automatically. The message “AM 9k
STEP” or AM 10k STEP” appears and thus the channel step
is changed.
[CD SERVICE MODE]
• This mode let you move the CD sled motor freely. Use this
mode when you want to clean the optical pick-up.
Procedure:
1. Press 
?/1
 button to turn the set ON.
2.  Select CD function.
      
3. Press   x  , [ENTER] button, and 
Z
OPEN/CLOSE
 button
simultaneously.
4. The CD service mode is activated. The message “SERVICE
MODE” appears.
5. With the CD in stop status, turn 
M
m
 knob to clockwise
rotation to move the optical pick-up to outside track, or turn
M
m
  knob to counterclockwise rotation to move to
inside track. The message “SLED OUT” or “SLED IN”
appears.
6. To turn on or off the laser, press [PLAY MODE] button. The
message “LASER ON” or “LASER OFF” appears on the
fluorescent indicator tube.
7. To release this mode, press 
?/1
 button.
[AGING MODE]
This mode can be used for operation check of CD section.
• If an error occurs, the aging operation would stops and the
status is displayed.
• If there are no error occurs, the aging operation would
continues repeatedly.
Procedure:
1.  Press 
?/1
 button to turn the set ON
2. Select CD function.
3. Load three discs on the disc tray.
4. Press [PLAY MODE] button to select the “ALL DISCS” mode,
and press the [REPEAT] button to select “REPEAT OFF” mode.
                
5. Press    x  button,  [ENTER]  button, and [EX-CHANGE/DISC
SKIP] button simultaneously.
6. Aging operation is started.
7. To release this mode, press 
?/1
 button or disconnect the
power cord to turn the power OFF.
Aging mode sequence:
Start (from disc 1)
Disc chucking
TOC reading
Play first track for 2 seconds
Play last track for 2 seconds
EX-CHANGE open/close
Open the disc tray
Disc skip
Close the disk tray
Change the next disc.
19
HCD-GN880
Display
M*$$%%&&##00
3) Display of no disc errors
D*: The number of mechanical error (“00” is latest one)
(Rotate 
>
.
 knob in the direction of either to display next
error)
$$: Error type
01:
Focus error
02:
GFS error
03:
Setup error
%%: Not used
&&:
00:
No disc judgment without chucking retry.
01:
No disc judgment after chucking retry.
##: The state when judged as no disc
01:
Stop
02:
Setup
03:
TOC reading
04:
Access
05:
Playback
06:
Pause
07:
Manual search (Play)
08:
Manual search (Pause)
[CD REPEAT 5 LIMIT OFF MODE]
• The number of repeat for CD playback is 5 times when the
repeat mode is “REPEAT ALL”. This mode enables CD to
repeat playback for limitless times.
Procedure:
1. Press 
?/1
 button to turn the set ON.
2. Select CD function.
    
3. Press x button, [EQ EDIT] button and [CD] button
simultaneously to enter the CD repeat 5 limit off mode and
the fluorescent indicator tube displays “LIMIT OFF”.
4. To release this mode, operate the cold reset. (Refer to the “MC
COLD RESET”)
[CD SHIP MODE (WITH MEMORY CLEAR)]
• This mode moves the optical pick-up to the position durable
to vibration and clears all data including preset data stored in
the RAM to initial conditions. Use this mode when returning
the set to the customer after repair.
Procedure:
1. Press 
?/1
 button to turn the set ON.
2. Select CD function.
     
3. Press  x  button,  [ENTER]  button and [GAME]  button
simultaneously. The set will power off automatically.
4. After the “STANDBY” blinking display finish, a message
“LOCK” is displayed on the fluorescent indicator tube and
the CD ship mode is set.
Display
D*$$%%&&##00
• Display when an error occurred (CD Error Code Mode)
Procedure:
          
1. Press x button, [ENTER] button and [DISC 1] button
simultaneously to enter the error code display mode.
2. The fluorescent indicator tube displays the number of total
error.
3. Each time 
M
m
  knob is rotated, display change as
below.
Display of total error
>
 +
direction
– 
.
direction
Display of Mechanical errors
>
 +
direction
– 
.
direction
Display of no disc errors
4. To clear the error record, operate the cold reset. (Refer to the
“MC COLD RESET”)
5. To release this mode, press the 
?/1
 button or disconnect
the power plug to turn the power OFF.
1) Display of total error
EM**: The number of mechanical errors.
ED**: The number of no disc errors after chucking the disc.
2) Display of mechanical errors
M*: The number of mechanical error (“00” is latest one)
(Rotate 
>
.
 knob in the direction of either to display next
error)
$$: Not used
%%: Loading related error (Second figure is not used)
D: Stop by the problem other than mechanical problem while
closing.
E: Stop by the problem other than mechanical problem while
opening.
C: Stop by the problem other than mechanical problem while
chucking up.
F: Stop by the problem other than mechanical problem while
chucking down.
&&: Emerging error
01: Stop while chucking up.
02: Stop while chucking up.
03: Time-out of EX-CHANGE open.
05: Time-out of EX-CHANGE close.
##: Not used
Display
EM**ED**
20
HCD-GN880
[CD SHIP MODE (WITHOUT MEMORY CLEAR)]
• 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
 button to turn the set ON.
2. Select CD function.
3. Press [CD] button and 
?/1
 button simultaneously. The set
will power off automatically.
4. After the “STANDBY” blinking display finish, a message
“LOCK” is displayed on the fluorescent indicator tube and
the CD ship mode is set.
[CD POWER MANAGE]
• This mode let you switch on or off power supply to the BU
during TUNER function.
•  When CD POWER is set to OFF, the power supply to the BU
is cut off during TUNER function. It will increase the time
taken to access CD when function change from TUNER to
CD but it will improve tuner reception.
• When CD POWER is set to ON, the power supply to the BU
is not cut off during TUNER function. It will reduce the time
taken to access CD when function change from TUNER to
CD but it will decrease tuner reception performance.
Procedure:
1.  Press 
?/1
 button to turn the set ON.
2. Select CD function.
3. Press 
?/1
 button to turn the set OFF.
               
4. Press  x  button and 
?/1
 button simultaneously. The set
will power on automatically.
5. The message “CD POWER ON” or “CD POWER OFF” will
be displayed on the fluorescent indicator tube.
[CD TRAY LOCK MODE]
• This mode let you lock the disc trays. When this mode is
activated, the disc tray will not open when 
Z
OPEN/CLOSE
button or [EX-CHANGE/DISC SKIP]  button is pressed. The
message “LOCKED” will be displayed in the will be displayed
on the fluorescent indicator tube.
Procedure:
1. Press 
?/1
 button to turn the set ON.
2. Select CD function.
   
3. Press  x  button and 
Z
OPEN/CLOSE
 button
simultaneously and hold down until “LOCKED” or
“UNLOCKED” displayed on the fluorescent indicator tube
(around 5 seconds).
 [VIDEO/MD SWITCHING]
• This mode let you switch from VIDEO to MD and vice-versa.
Procedure:
1. Press 
?/1
 button to turn the set ON.
2. Select VIDEO function.
3. Press [VIDEO/MD] button and 
?/1
 button simultaneously.
The function will change to MD. Press the same buttons again
to change from MD to VIDEO.
Page of 77
Display

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