DOWNLOAD Sony HCD-GTX88 / HCD-GTX88BP Service Manual ↓ Size: 6.7 MB | Pages: 104 in PDF or view online for FREE

Model
HCD-GTX88 HCD-GTX88BP
Pages
104
Size
6.7 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-gtx88-hcd-gtx88bp.pdf
Date

Sony HCD-GTX88 / HCD-GTX88BP Service Manual ▷ View online

25
HCD-GTX88/GTX88BP
[CD ERROR CODE MODE]
• Display the CD error code when an error occurred.
Procedure:
1. Press  x  button, [ENTER] button and [DISC 1] button
simultaneously to enter the error code display mode.
2. The fluorescent indicator tube display the number of total error.
3. Each time  m  button and  M  button are turned, display
change as below.
%%
: The process when trouble occurs
  01
: Process ejecting DISC
  02
: Process waiting for inserting DISC
  03
: Process sending request to insert a disc to upper
  layer.
  04
: Process sending request to eject a disc to upper
  layer.
  05
: Process pulling a DISC in.
  06
: Chucking process
  07
: Re-chucking process
  08
: Process cancelling chucking
&&
: The operation when trouble occurs
  00
: Waiting for operation.
  10/11/12/13: During eject operation
  20
: While pulling a disc in
  30
: While cancelling chucking
  40/41/42/43: During eject operation due to error.
0000 : Not used (Value is fixed to 0000).
• Display of BD error. It is shown with “D” and 11 digits
number.
DISPLAY OF
TOTAL ERROR
DISPLAY OF
MECHANICAL
ERRORS
BUTTON
M
m
BUTTON
DISPLAY OF
NO DISC
ERRORS
BUTTON
M
m
BUTTON
M
M
M
M
4. To clear the error record, operate the cold reset. (Refer to the
“MC COLD RESET”.)
5. To release from this mode, press the  ?/1  button or disconnect
the power OFF.
• Display of total error
Em** : The number of times for CDM (mechanical) errors.
Ed** : The number of times for BD error (after chucking the
  disc.).
• Display of CDM (mechanical) error. It is show with “M” and
11 digit number.
Em**Ed**
M*$$%%&&0–
000
M*
: The number of history error for mechanical. (“0” is
  latest one) (Turn  >  button to display next error.)
$$
: Mechanical errors occur in the operation.
  FF
: Mechanical error during normal operation.
  Other: Mechanical error during initializing operation.
D*$$%%&&#–
#00
D*
: The number of error history (“0” is latest one)
  (Press  >  button to display next error.)
$$
: The detail of trouble
  01
: Can not focus
  02
: GFS error
  03
: Start-up time over
  04
: Continuously out of focus
  05
: Q code is not input for certain time
  06
: Tracking on is impossible
  07
: Blank disc
%%
: The process when trouble occurs
  01
: While SHIP process is performed
  02
: While POWER OFF is processed
  03
: While INITIALIZE (POWER ON) is processed.
  04
: While oscillation stops
  05
: From stopping oscillation to start oscillation
  06
: During stop
  07
: During STOP operation
  08
: While start-up is processed
  09
: While TOC reading is processed
  0a
: During search operation
  0b
: During PLAY operation
  0c
: During pause operation
  0d
: During PLAY manual search operation
  0e
: During PAUSE manual search operation
&&
: Processing operation when trouble occurs
  Show each STEP mentioned in %% digits.
##
: Disc speed when trouble occurs.
  01
: x1 speed
  02
: x2 speed (for models which support x2 speed)
  04
: x4 speed
00
: Not used (value is fixed to 00).
26
HCD-GTX88/GTX88BP
[CD REPEAT 5 LIMIT OFF MODE]
• The number of repeat for CD playback is 5 times when the re-
peat mode is “REPEAT ALL”. This mode enables CD to repeat
playback for limitless times.
Procedure:
1. Press  ?/1  button to turn on the system.
2. Select CD function.
3. Press  x  button, [CD] button and [DISC 1] button simultaneously
to enter the CD repeat 5 limit off mode and the fluorescent
indicator tube displays “LIMIT OFF”.
• To release from 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 on the system.
2. Select CD function.
3. Press  x  button, [SOUND FLASH] button and  ?/1  button
simultaneously. The system will turn off automatically.
4. After the “STANDBY” blinking display finishes, a message
“MECHA LOCK” is displayed on the fluorescent indicator tube
and the CD ship mode is set.
5. The Memory is clear after AC Power OFF.
[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 on the system.
2. Select CD function.
3. Press [CD] button and  ?/1  button button simultaneously. The
system will turn off automatically.
4. After the “STANDBY” blinking display finishes, a message
“MECHA LOCK” is displayed on the fluorescent indicator tube
and the CD ship mode is set.
[CD/USB POWER MANAGE]
• This mode let you switch on or off power supply to the BU and
USB Micom during TUNER function.
• When CD and USB POWER is set to OFF, the power supply to
the BU and USB Micom is cut off during TUNER function. It
will increase the time taken to access CD and USB when function
change from TUNER to CD or USB but it will improve tuner
reception.
• When CD and USB POWER is set to ON, the power supply to
the BU and USB Micom is not cut off during TUNER function.
It will reduce the time taken to access CD or USB when function
change from TUNER to CD or USB but it will decrease tuner
reception performance.
Procedure:
1. Press  ?/1  button to turn on the system.
2. Select CD section.
3. Press  ?/1  button to turn off the system.
4. When demonstration appear, press  x  button and  ?/1  button
simultaneously. The set will power on automatically.
5. The message “CD/USB POWER ON” or “CD/USB POWER
OFF” will be displayed on the fluorescent indicator tube.
[CD TRAY LOCK MODE]
• This mode let you lock the disc tray. When this mode is activated,
the disc tray will not open when [OPEN/CLOSE] button or [DISC
SKIP/EX-CHANGE] button is pressed. The message “LOCKED”
will be displayed on the fluorescent indicator tube.
Procedure:
1. Press  ?/1  button to turn on the system.
2. Select CD function.
3. Press  x    button,  [OPEN/CLOSE]  button simultaneously and
hold down until “LOCKED” or “UNLOCKED” displayed on
the fluorescent indicator tube (around 5 seconds).
[TCM OFFLINE MODE]
• This mode is used to prevent the system from turning off auto-
matically when TCM is not connected. Therefore, measurements
can be done even when TCM is not connected during produc-
tion.
Procedure:
1. When the system is turned off, press [EQ BAND/MEMORY]
button, [TAPE A/B] button and  ?/1  button simultaneously. The
system will turn on automatically.
2. The message “TCM OFFLINE” will be displayed on the
fluorescent indicator tube.
• To release from TCM Offline Mode, perform “COLD RESET”
or turn off the power supply.
[VACS DISPLAY]
• This mode is used to check the VACS level.
Procedure:
1. Press  ?/1  button to turn on the system.
2. Press  x  button, [CHORUS] button and [DISC SKIP/EX-
CHANGE] button simultaneously.
3. The VACS Level Display, the fluorescent indicator tube displays
“VATB F APC”. “V” represent VACS, A represent VACS level
which is triggered by signal level, “T” represent Thermal VACS
NEO, B represent VACS level which is triggered by temperature,
“F” represent FAN is triggered by software to turn in to high
speed, “AP” represent APVACS (Abuse Protection VACS) and
“C” represent APVACS level which is triggered.
27
HCD-GTX88/GTX88BP
[ERROR MESSAGE]
1. GC error message
• Display
Display on fluorescent indicator tube,
         GC ERR01
When “GC ERR01” message appears, all LEDs lights up  and
set becomes hang.
Set does not respond to any main unit keys or remote controller
keys.
What to do
1. Please check the model resistor value and replace with correct
parts.
2. Plug in the set. The error message shall not be appear.
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
2.9m N • m to 6.9m N • m
FWD
CQ-102C
30 to 70 g • cm
(0.42 – 0.97 oz • inch)
FWD
0.15m N • m to 0.59m N • m
back tension
CQ-102C
2 to 6 g • cm
(0.03 – 0.08 oz • inch)
 2.9m N • m to 6.9m N • m
REV
CQ-102RC
30 to 70 g • cm
(0.42 – 0.97 oz • inch)
0.15m N • m to 0.59m N • m
REV
CQ-102RC
2 to 6 g • cm
back tension
(0.03 – 0.08 oz • inch)
4.8m N • m to 16.7m N • m
FF/REW
CQ-201B
49 to 170 g • cm
(0.68 – 2.36 oz • inch)
Mode
Torque meter
Meter reading
SECTION 4
MECHANICAL ADJUSTMENTS
28
HCD-GTX88/GTX88BP
[FM Tune Level Check]
Procedure:
1. Turn the power on.
2. Input the following signal from Signal Generator to FM
antenna input directly.
* Carrier Freq : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation
: 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note:
Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and tune A, B and C signals.
4. Confirm “TUNED” is lit on the display for A, B and C signals.
The mark of “TUNED” means “The selected station signal is
received in good condition.”
FM signal generator
OUT (75 
)
SET
SECTION 5
ELECTRICAL ADJUSTMENTS
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjust.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in
this service manual.  (As a general rule, playback circuit
adjustment should be completed before performing recording
circuit adjustment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless otherwise
specified.
• Test Tape
[RECORD/PLAYBACK HEAD AZIMUTH
ADJUST-MENT]
DECK A      DECK B
Note:
  Perform this adjustments for both decks
Procedure:
1. Mode:  Playback
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
Tape
Signal
Used for
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
set
MAIN board
CN510
Pin 1 (L-CH)
Pin 3 (R-CH)
MAIN board
CN510
Pin 2 (GND)
+
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
screw
position
L-CH
peak
within
1dB
output
level
L-CH
peak
R-CH
peak
within
1dB
screw
position
R-CH
peak
TUNER SECTION
0 dB = 1 µV
DECK SECTION
0 dB = 0.775 V
Page of 104
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