Sony HCD-GX355 / HCD-GX555 / HCD-RG270 / HCD-RG475 / HCD-RG575 / MHC-GX355 / MHC-GX555 / MHC-RG270 / MHC-RG475S / MHC-RG575S Service Manual ▷ View online
17
HCD-GX355/GX555/RG270/RG475/RG575
AGING MODE
This mode can be used for operation check of CD section and tape
deck section.
CD section and tape deck section work in parallel.
If an error occurred:
The aging operation stops only an error occurred sections and display
then status.
If no error occurs:
The aging operation continues repeatedly.
Procedure:
deck section.
CD section and tape deck section work in parallel.
If an error occurred:
The aging operation stops only an error occurred sections and display
then status.
If no error occurs:
The aging operation continues repeatedly.
Procedure:
1. Press the
I
/1
button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Load three discs and insert two tape to the deck A and B.
4. Press three buttons of
3. Load three discs and insert two tape to the deck A and B.
4. Press three buttons of
x
, [ILLUMINATION] and [DISC SKIP/EX-
CHANGE] simultaneously.
5. Aging operations of CD and tape are started at the same time.
6. To release this mode, press the
6. To release this mode, press the
I
/1
button to turn the power
off or press the function buttons to change the function.
1. Display at the Aging Mode
Display operating state of CD section and tape deck section
alternately.
If an error occurred, stop display which that section.
alternately.
If an error occurred, stop display which that section.
2. CD Section
The sequence during the aging mode is following as below.
Display at the aging mode is the same as the normal operation.
Display at the aging mode is the same as the normal operation.
Aging mode sequence (CD section) :
Start (from disc 1)
Disc chucking
TOC read
Play first track for 2 seconds
Play last track for 2 seconds
EX-change open/close
Open the disc tray
Disc skip
Close the tray
Change the next disc.
3. Tape Deck Section
The sequence during the aging mode is following as below.
If an error occurred, stop display that step.
If an error occurred, stop display that step.
Aging mode sequence (tape deck section) :
Rewind the tape A and B
“TAPE AAG-1 or TAPE BAG-2”
Shut off
FWD play the tape A
“TAPE AAG-3”
2 minutes
Rewind the tape A
“TAPE AAG-6”
Shut off
FWD play the tape B
“TAPE BAG-3”
2 minutes
Rewind the tape B
“TAPE BAG-6”
Shut off
Note:
“TAPE *AG-*” is display of each step.
PANEL TEST MODE
This mode is used to check the fluorescent indicator tube, LEDs
and buttons.
Procedure:
and buttons.
Procedure:
1. Press the
I
/1
button to turn the power on.
2. Press three buttons of
x
, [ILLUMINATION] and [GROOVE]
simultaneously.
3. Fluorescent indicator tube and LEDs are all turned on.
4. Press two buttons of [ALBUM ---] and [ENTER] simultaneously,
4. Press two buttons of [ALBUM ---] and [ENTER] simultaneously,
mode is changed over.
5. In the key check mode, press each key, the defined key number
of every each key list is displayed on the fluorescent indicator
tube.
tube.
6. In the key count check mode, “KEYCNT 0” is displayed on
the fluorescent indicator tube. Each time a key is pressed, “K”
value increases. However, once a key is pressed, it is no longer
taken into account.
value increases. However, once a key is pressed, it is no longer
taken into account.
7. In the headphone input check mode, connect the headphone,
the message “H_P ON” is displayed on the fluorescent
indicator tube, and disconnect the headphone, the message
“H_P OFF” is displayed on the fluorescent indicator tube.
indicator tube, and disconnect the headphone, the message
“H_P OFF” is displayed on the fluorescent indicator tube.
8. In the volume check mode, “VOLUME FLAT” is displayed
on the fluorescent indicator tube. Turn the [MASTER
VOLUME] knob clockwise, the message “VOLUME UP”
is displayed on the fluorescent indicator tube momentarily
and turn the [MASTER VOLUME] knob counterclockwise,
the message “VOLUME DOWN” is displayed on the
fluorescent indicator tube momentarily.
VOLUME] knob clockwise, the message “VOLUME UP”
is displayed on the fluorescent indicator tube momentarily
and turn the [MASTER VOLUME] knob counterclockwise,
the message “VOLUME DOWN” is displayed on the
fluorescent indicator tube momentarily.
18
HCD-GX355/GX555/RG270/RG475/RG575
MC TEST MODE
This mode is used to check operations of microprocessor.
Procedure:
Procedure:
1. Press the
I
/1
button to turn the power on.
2. Press three buttons of
x
, [ILLUMINATION] and [DISC 3]
simultane-ously.
3. When the MC test mode is activated, VACS level is displayed
on the fluorescent indicator tube momentarily.
4. Turn the [ --- EQ + ]
L
l
knob clockwise, the message
“ALL EQ MAX” is displayed on the fluorescent indicator
tube momentarily and turn the [ --- EQ + ]
tube momentarily and turn the [ --- EQ + ]
L
l
knob
counter-clockwise, the message “ALL EQ MIN” is
displayed on the fluorescent indicator tube momentarily.
displayed on the fluorescent indicator tube momentarily.
5. Press the [PRESET EQ] button, the message “ALL EQ FLAT”
is displayed on the fluorescent indicator tube momentarily.
6. Turn the [MASTER VOLUME] knob clockwise, the message
“VOLUME MAX” is displayed on the fluorescent indicator
tube momentarily and turn the [MASTER VOLUME] knob
counterclockwise, the message “VOLUME MIN” is displayed
on the fluorescent indicator tube momentarily.
tube momentarily and turn the [MASTER VOLUME] knob
counterclockwise, the message “VOLUME MIN” is displayed
on the fluorescent indicator tube momentarily.
7. Press the [GROOVE] button to changed over VACS on/off.
8. When the [CD SYNC] key is pressed with the test tape (AMS-
8. When the [CD SYNC] key is pressed with the test tape (AMS-
100, AMS-110A) in the deck, number of space between tunes
is counted, then if AMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.
is counted, then if AMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.
9. Press the
I
/1
button to release from this mode, then cold reset
is performed.
VERSION DISPLAY MODE
This mode is used to check the model, destination and software
version.
Procedure:
version.
Procedure:
1. Press the
I
/1
button to turn the power on.
2. Press three buttons of
x
, [ILLUMINATION] and [DISC 2]
simultane-ously.
3. When this mode is activated, model and destination is displayed
on the fluorescent indicator tube.
4. Press the [DISPLAY] button to changed over between software
version and year, month, day of the software creation display
mode and model and destination display mode.
mode and model and destination display mode.
5. To release this mode, press three buttons of
x
, [ILLUMI
NATION] and [DISC 2] simultaneously.
CD ERROR CODE DISPLAY MODE
This mode can be used for error code display of CD section.
Procedure:
Procedure:
1. Press the
I
/1
button to turn the power on.
2. Press the [CD] key to select “CD”.
3. Press three buttons of
3. Press three buttons of
x
, [CD] and [DISC 1] simultaneously.
4. When this mode is activated, mechanism deck error code is
displayed on the fluorescent indicator tube.
5. Press the [GROOVE] button to changed over between optical
pick-up error code display mode and mechanism deck error
code mode.
code mode.
6. Turn the [ --- EQ + ]
L
l
knob to change over display of error
history.
7. To release this mode, press the
I
/1
button to turn the power
off.
1. Mechanism Deck Error Code Mode
When this mode is entered, mechanism deck error code is displayed
with the 10-character format on the fluorescent indicator tube.
with the 10-character format on the fluorescent indicator tube.
The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. In the mechanism deck error code mode, “M” is displayed on
the fluorescent indicator tube.
The first digit from the left indicates which mode the error history
is. In the mechanism deck error code mode, “M” is displayed on
the fluorescent indicator tube.
The second digit from the left indicates:
(Error history number display)
The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
(Error history number display)
The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
Display
Status
0
0
No error
0
8
Table operation time-out (Table does not move to the target
position within the specified time)
1
6
In the chucking down operation, the operation was retried
by the maximum number of times but the operation could
not be completed
1
7
In the chucking up and down operation, the reverse
recovery processing was attempted but it could not be
recovered
1
8
In the chucking up operation, the operation was retried by
the maximum number of times but the operation could not
be completed
2
0
Loading operation time-out (Table does not move to the
target position within the specified time)
2
2
As the chuck was in the ex-open status at the initialization,
the closing was attempted but could not be completed
The 5th and 6th digit from the left indicates:
(Present status display)
The 5th and 6th digit from the left indicates which operating status
when an error occurred is indicated.
(Present status display)
The 5th and 6th digit from the left indicates which operating status
when an error occurred is indicated.
Display
Status
0
1
Open completion status
0
2
From open status, the movement to chucking down position
is under way
0
3
From chucking down position, the open operation is under
way
0
4
Chucking down completion status
1
0
The chucking down operation is under way
1
1
The chucking up operation is under way
1
2
Close completion status
1
3
From close status, the ex-open operation is under way
1
4
From ex-open status, the close operation is under way
1
8
Ex-pen completion status
19
HCD-GX355/GX555/RG270/RG475/RG575
The 5th and 6th digit from the left indicates:
(Error step display)
The 5th and 6th digit from the left indicates which processing when
a trouble occurred
(Error step display)
The 5th and 6th digit from the left indicates which processing when
a trouble occurred
Display
Contents
0
1
Power OFF in progress
0
2
Initialize in progress
0
3
Oscillation stopping
0
4
From oscillation stop, oscillation starting
0
5
Stopping
0
6
Stop operation is under way
0
7
Start operation in progress
0
8
TOC read in progress
0
9
Search operation is under way
0
A
Playback operation is under way
0
B
Pause operation is under way
0
C
Playback manual search operation is under way
0
D
Pause manual search operation is under way
0
E
—
The 7th and 8th digit from the left indicates:
The 7th and 8th digit from the left indicates which operation in
progress when a trouble occurred. (Step of each processing of the
5th and 6th digits is indicated)
The 7th and 8th digit from the left indicates which operation in
progress when a trouble occurred. (Step of each processing of the
5th and 6th digits is indicated)
5 REPEAT LIMIT CANCEL MODE
Number of repeat for CD playback is 5 times when the repeat mode
is “REPEAT”. This mode is used to enables CD to repeat playback
for limitless times.
Procedure:
is “REPEAT”. This mode is used to enables CD to repeat playback
for limitless times.
Procedure:
1. Press the
I
/1
button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press three buttons of
3. Press three buttons of
x
, [CD] and [PLAY MODE/TUNING
MODE] simultaneously.
4. The message “LIMIT OFF” is displayed on the fluorescent
indicator tube momentarily, CD repeat 5 limit is cancelled.
The 7th and 8th digit from the left indicates:
(Motor status display)
The 7th and 8th digit from the left indicates which motor output
status when an error occurred is indicated.
(Motor status display)
The 7th and 8th digit from the left indicates which motor output
status when an error occurred is indicated.
Display
Status
×
0
No table motor output
×
1
Table motor forward output
×
2
Table motor backward output
×
3
Table motor break output
0
×
No loading motor output
1
×
Loading motor forward output
2
×
Loading motor backward output
3
×
Loading motor break output
The 9th and 10 th digit from the left indicates:
(Tray status display)
The 9th and 10th digit from the left indicates which target processing
when an error occurred is indicated.
(Tray status display)
The 9th and 10th digit from the left indicates which target processing
when an error occurred is indicated.
Display
Status
0
1
Open operation
1
2
Close operation
1
8
Ex-open operation
2. Optical Pick-up Error Code Mode
When this mode is entered, optical pick-up error code is displayed
with the 8-character format on the fluorescent indicator tube.
with the 8-character format on the fluorescent indicator tube.
The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. In the optical pick-up error code mode, “D” is displayed on the
fluorescent indicator tube.
The first digit from the left indicates which mode the error history
is. In the optical pick-up error code mode, “D” is displayed on the
fluorescent indicator tube.
The second digit from the left indicates:
(Error history No. display)
The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
(Error history No. display)
The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
Display
Status
0
1
Not focused (TOC read without a disc)
0
2
GFS NG (TOC read with a disc chucked)
0
3
Start operation time-over
0
4
Defocused continuously (Defocused during TOC reading)
0
5
Q code not entered for specified time
0
6
Tracking not turned ON
0
7
Blank disc (Blank disc TOC read)
20
HCD-GX355/GX555/RG270/RG475/RG575
CD SECTION
Note:
1.
CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
Therefore, check each item in order given.
2.
Use YEDS-18 (3-702-101-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10M
Ω
impedance.
4.
Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
signal level is low than specified value with the following checks.
•
Abbreviation
MX: Mexican model
MX: Mexican model
S-CURVE CHECK
Procedure:
1. Connect an oscilloscope to TP (FE) and TP (VC) on the CD
board (except MX) or BD board (MX).
2. Press the
I
/1
button to turn the power on.
3. Load the disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
search)
4. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 3
within 3
±
0.5 Vp-p.
Note:
•
Try to measure several times to make sure than the ratio of A : B
or B : A is more than 10 : 7.
or B : A is more than 10 : 7.
•
Take sweep time as long as possible and light up the brightness
to obtain best waveform.
to obtain best waveform.
Connecting Location: CD board (except MX)
BD board (MX)
RFAC LEVEL CHECK
Procedure:
1. Connect an oscilloscope to TP (RFACO) and TP (VC) on the
CD board (except MX) or BD board (MX).
2. Press the
I
/1
button to turn the power on.
3. Load the disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check if RFAC
4. Confirm that oscilloscope waveform is clear and check if RFAC
signal level is correct or not.
Note:
Clear RFAC signal waveform means that the shape “
◊
” can be clearly
distinguished at the center of the waveform.
Connecting Location: CD board (except MX)
BD board (MX)
CD board (except MX)
BD board (MX)
BD board (MX)
oscilloscope
TP(FE)
TP(VC)
TP(VC)
symmetry
S-curve waveform
within 3
±
0.5 Vp-p
A
B
TP(RFACO)
CD board (except MX)
BD board (MX)
BD board (MX)
oscilloscope
TP(VC)
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
level : 1.3
±
0.3 Vp-p
– CD BOARD (Conductor Side) (except MX) –
– BD BOARD (Conductor Side) (MX) –
– BD BOARD (Conductor Side) (MX) –
TP
(VC)
TP
(FE)
TP
(RFACO)
IC101
SECTION 5
ELECTRICAL ADJUSTMENTS
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