Sony HCD-ZT4 / LBT-ZT4 Service Manual ▷ View online
HCD-ZT4
17
SECTION 4
TEST MODE
PANEL TEST MODE
This mode is used to check the fl uorescent indicator tube, LEDs,
keys, [MASTER VOLUME] jog, [OPERATION DIAL] jog, mod-
el, destination and software version.
Procedure:
1. Press [
keys, [MASTER VOLUME] jog, [OPERATION DIAL] jog, mod-
el, destination and software version.
Procedure:
1. Press [
x
] button, [METER MODE] button and [DISC 2] but-
ton simultaneously.
2. All LEDs and segments in fl uorescent indicator tube are lighted
up. The POWER LED is lighted up in red color if the system is
turned off and POWER LED is turn off if the system is turned
on.
turned off and POWER LED is turn off if the system is turned
on.
3. When you want to enter to the software version display mode,
press [DISC 1] button. The model information appears on the
fl uorescent indicator tube. The message “GSL 2RS” appears
on the fl uorescent indicator tude. Press [DISC 1] button again
to view the destination information.
fl uorescent indicator tube. The message “GSL 2RS” appears
on the fl uorescent indicator tude. Press [DISC 1] button again
to view the destination information.
4. During the destination information display, press [DISC 1]
button. Each time [DISC 1] button is pressed, the fl uorescent
indicator tube shows the version of each category software in
the following sequence: SC, GC, SYS, CD, CDDM, CDMA,
CDMB, BDA, BDB, ST, TC, TA, TM, MM1, MM2 (USB
Micro computer) , MTR (METER) and return back to model
information display.
indicator tube shows the version of each category software in
the following sequence: SC, GC, SYS, CD, CDDM, CDMA,
CDMB, BDA, BDB, ST, TC, TA, TM, MM1, MM2 (USB
Micro computer) , MTR (METER) and return back to model
information 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 appears. When [DISC 3] button is
pressed again, the display returns to the software version dis-
play. 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 dis-
play.
of the software creation appears. When [DISC 3] button is
pressed again, the display returns to the software version dis-
play. 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 dis-
play.
6. Press [DISC 2] button, the key check mode is activated.
7. In the key check mode, the fl uorescent indicator tube displays
7. In the key check mode, the fl uorescent indicator tube displays
“K 0 J0 V0”.
Each time a button is pressed, “K” value increases. However,
once a button has been pressed, it is no longer taken into ac-
count.
once a button has been pressed, it is no longer taken into ac-
count.
“V” value increases in the manner of 0,1, 2, 3 ... if [MASTER
VOLUME] knob is turned clockwise, or it decreases in the
manner of 0, 9, 8,7 ... if [MASTER VOLUME] knob is turned
counterclockwise.
VOLUME] knob is turned clockwise, or it decreases in the
manner of 0, 9, 8,7 ... if [MASTER VOLUME] knob is turned
counterclockwise.
“J” value increases in the manner of 0,1, 2, 3 ... if [OPERA-
TION DIAL] knob is turned clockwise, or it decreases in the
manner of 0, 9, 8,7 ... if [OPERATION DIAL] knob is turned
counterclockwise.
TION DIAL] knob is turned clockwise, or it decreases in the
manner of 0, 9, 8,7 ... if [OPERATION DIAL] knob is turned
counterclockwise.
8. When [DISC SKIP/EX-CHANGE] button is pressed after all
LEDs and segments in fl uorescent indicator tube light up, al-
ternate segments in fl uorescent indicator tube and LEDs would
light up. If you press [DISC SKIP/EX-CHANGE] button
again, another half of alternate segments in fl uorescent indica-
tor tube and LEDs would light up. Pressing [DISC SKIP/EX-
CHANGE] button again would cause all segments in fl uores-
cent indicator tube and LEDs light up.
ternate segments in fl uorescent indicator tube and LEDs would
light up. If you press [DISC SKIP/EX-CHANGE] button
again, another half of alternate segments in fl uorescent indica-
tor tube and LEDs would light up. Pressing [DISC SKIP/EX-
CHANGE] button again would cause all segments in fl uores-
cent indicator tube and LEDs light up.
9. To release from this mode, press three buttons in the same
manner as step 1, or disconnect the power cord.
COMMON TEST MODE
This mode is used to check operations of the respective sections of
Amplifi er and Tape.
Amplifi er and Tape.
To enter Common Test Mode
Procedure:
1. Press [
Procedure:
1. Press [
x
] button, [METER MODE] button and [DISC 3] but-
ton simultaneously.
2. The CD ring indicators fl ash on the fl uorescent indicator tube.
The function is changed to AUDIO and the volume is changed
to VOLUME MIN.
to VOLUME MIN.
Check of Amplifi er
Procedure:
1. Press [EQ BAND] button repeatedly until a message “GEQ
Procedure:
1. Press [EQ BAND] button repeatedly until a message “GEQ
MAX” appears on the fl uorescent indicator tube. GEQ increas-
es to its maximum.
es to its maximum.
2. Press [EQ BAND] button repeatedly until a message “GEQ
MIN” appears on the fl uorescent indicator tube. GEQ decreas-
es to its minimum.
es to its minimum.
3. Press [EQ BAND] button repeatedly until a message “GEQ
FLAT” appears on the fl uorescent indicator tube. GEQ is set to
fl at.
fl at.
4. When the [MASTER VOLUME] knob is turned clockwise
even slightly, the sound volume increases to its maximum and
a message “VOLUME MAX” appears on the fl uorescent indi-
cator tube.
a message “VOLUME MAX” appears on the fl uorescent indi-
cator tube.
5. When the [MASTER VOLUME] knob is turned counterclock-
wise even slightly, the sound volume decreases to its minimum
and a message “VOLUME MIN” appears on the fl uorescent
indicator tube.
and a message “VOLUME MIN” appears on the fl uorescent
indicator tube.
Tape function
When a tape is inserted in deck and recording is started, the func-
tion is changed to AUDIO.
When a tape is inserted in deck and recording is started, the func-
tion is changed to AUDIO.
To release from Common Test mode
Procedure:
1. To release from this mode, press [
Procedure:
1. To release from 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
EEPROM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Press
EEPROM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Press [
x
] button, [ENTER] button, and [
?/1
] button simulta-
neously.
3. “COLD RESET” appears on the fl uorescent indicator tube.
After that, the fl uorescent indicator tube becomes blank for a
while, and the system is reset.
while, and the system is reset.
VACS ON/OFF
This mode is used to switch ON and OFF the VACS (Variable At-
tenuation Control System).
Procedure:
1. Press
tenuation Control System).
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Press
[
x
] button, [DISC 2], and [DISPLAY] button simultane-
ously. The message “VACS OFF” or “VACS ON” appears on
the fl uorescent indicator tube.
the fl uorescent indicator tube.
HCD-ZT4
18
TUNER STEP CHANGE
The step interval of AM channels can be toggled between 9 kHz
and 10 kHz. This mode is not available for Saudi Arabian, Euro-
pean and Russian models.
Procedure:
1. Press
and 10 kHz. This mode is not available for Saudi Arabian, Euro-
pean and Russian models.
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Press [TUNER/BAND] button repeatedly to select the “AM”.
3. Press
3. Press
[
?/1
] button to turn off the system.
4. Press [ENTER] button and [
?/1
] button simultaneously. The
system turns on automatically. The message “AM 9K STEP”
or “AM 10K STEP” appears on the fl uorescent indicator tube
and thus the channel step is changed.
or “AM 10K STEP” appears on the fl uorescent indicator tube
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
when you want to clean the optical pick-up.
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Press [CD] button to select CD function.
3. Press [
3. Press [
x
] button, [METER MODE] button, and [OPEN/
CLOSE] button simultaneously.
4. The CD service mode is activated. The message “SERVICE
MODE” appears on the fl uorescent indicator tube.
5. With the disc in stop status, press [M] to move the optical
pick-up to outside track, or press [m] to move to inside track.
The message “SLED OUT” or “SLED IN” appears on the fl uo-
rescent indicator tube.
The message “SLED OUT” or “SLED IN” appears on the fl uo-
rescent indicator tube.
6. To turn on or off the laser, press [>] button. The message
“LD ON” or “LD OFF” appears on the fl uorescent indicator
tube.
tube.
7. To release from this mode, press [
?/1
] button.
CD 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 were no error occurs, the aging operation would
continue repeatedly.
Procedure:
1. Press
If an error occurs, the aging operation would stops and the status is
displayed. If there were no error occurs, the aging operation would
continue repeatedly.
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Select CD function.
3. Load three discs on the disc tray.
4. Press [PLAY MODE/TUNING MODE] button on the remote
3. Load three discs on the disc tray.
4. Press [PLAY MODE/TUNING MODE] button on the remote
repeatedly to select the “ALL DISCS” mode, and press the
[REPEAT/FM MODE] button on the remote repeatedly to se-
lect “REPEAT OFF” mode.
[REPEAT/FM MODE] button on the remote repeatedly to se-
lect “REPEAT OFF” mode.
5. Press [
x
] button, [METER MODE] button and [DISC SKIP/
EX-CHANGE] button simultaneously.
6. Aging operation is started.
7. To release from this mode, press [
7. To release from this mode, press [
?/1
] button or disconnect the
power cord to turn off the system.
• Aging mode sequence:
CD ERROR CODE MODE
Display the CD error code when an error occurred
Procedure:
1. Press [
Procedure:
1. Press [
x
] button, [METER MODE] button and [DISC 1] but-
ton simultaneously to enter the error code display mode.
2. The
fl uorescent indicator tube displays the number of total er-
ror.
3. Each time [m] or [M] button is pressed, display change as
below.
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 disc tray
Change the disc tray
HCD-ZT4
19
CD REPEATS 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 play-
back for limitless times.
Procedure:
1. Press
mode is “REPEAT ALL”. This mode enables CD to repeat play-
back for limitless times.
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Select CD function.
3. Press
3. Press
[x] button, [CD] button and [DISC 1] button simultane-
ously to enter the CD repeat 5 limit off mode and the fl uores-
cent indicator tube displays “LIMIT OFF”.
cent indicator tube displays “LIMIT OFF”.
4. To release from this mode, operate the cold reset. (Refer to the
“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 EE-
PROM to initial conditions during the next AC-In. Use this mode
when returning the set to the customer after repair.
Procedure:
1. Press
vibration and clears all data including preset data stored in the EE-
PROM to initial conditions during the next AC-In. 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
3. Press
[x] button, [DISC 1] button and [
?/1
] button simultane-
ously. The system turns off automatically.
4. After the “STANDBY” blinking display fi nishes, a message
“MECHA LOCK” is displayed on the fl uorescent indicator
tube and the CD ship mode is set.
tube and the CD ship mode is set.
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
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 [DISC SKIP/EX-CHANGE] button and [
3. Press [DISC SKIP/EX-CHANGE] button and [
?/1
] button si-
multaneously. The system turns off automatically.
4. After the “STANDBY” blinking display fi nishes, a message
“MECHA LOCK” is displayed on the fl uorescent indicator
tube and the CD ship mode is set.
tube and the CD ship mode is set.
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 fl uorescent indicator tube.
Procedure:
1. Press
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 fl uorescent indicator tube.
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Select CD function.
3. Press [x] button and [OPEN/CLOSE] button simultaneously
3. Press [x] button and [OPEN/CLOSE] button simultaneously
and hold down until “LOCKED” or “UNLOCKED” displayed
on the fl uorescent indicator tube (around 5 seconds).
on the fl uorescent indicator tube (around 5 seconds).
FACTORY PRESET
This mode is use to load all the factory use preset frequencies into
FM 1-FM 20 and AM 1-AM 10. Originally, frequency of FM 1-
FM 20 and AM 1-AM10 are set to the minimum frequency.
Procedure:
1. Press
FM 1-FM 20 and AM 1-AM 10. Originally, frequency of FM 1-
FM 20 and AM 1-AM10 are set to the minimum frequency.
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Press [TUNER/BAND] button, [x] button, and [DISC 1] but-
ton simultaneously and the message “FACTORY” appears
on the fl uorescent indicator tube. The function is changed to
TUNER automatically.
on the fl uorescent indicator tube. The function is changed to
TUNER automatically.
4. To clear the error record, operate the cold reset. (Refer to the
“COLD RESET”)
5. To release from this mode, press the [
?/1
] button or disconnect
the power plug to turn off the system.
• Display of total error
EM**ED**
EM** : The number of mechanical errors.
ED** : The number of no disc errors after chucking the disc.
ED** : The number of no disc errors after chucking the disc.
• Display of mechanical errors
M*
M* : The number of mechanical error (“0” is latest one)
(Press [>] button to display the next error)
• Display of no disc errore
D*$$%%�
D* : The number of no disc error (“0” is latest one)
(Press [>] button to display next error)
$$ : 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)
Display of
Total Error
Total Error
Display of
Mechanical
Errors
FF button
AMS (+)
button
AMS (+)
button
AMS (–)
button
AMS (–)
button
FR button
FF button
FR button
Display of
No Disc
Errors
HCD-ZT4
20
SECTION 5
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head
pinch roller
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head demag-
netizer. (Do not bring the head magnetizer close to the erase
head.)
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
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
Mode
Torque Meter
Meter Reading
FWD
CQ-102AS
2.0 – 8.0 mN • m
(20 to 80 g • cm)
(0.28 – 1.12 oz • inch)
FWD
Back Tension
Back Tension
CQ-102C
0.15 – 0.6 mN • m
(1.5 to 6 g • cm)
(0.021 – 0.083 oz • inch)
FF
CQ-201AS
5 – 17.7 mN • m
(50 to 177 g • cm)
(0.7 – 2.48 oz • inch)
REV
CQ-201B
5 – 17.7 mN • m
(50 to 177 g • cm)
(0.7 – 2.48 oz • inch)
• Tape Tension Measurement
Mode
Tension Meter
Meter Reading
FWD
CQ-403A
more than 80 g
(more than 2.82 oz)
VACS DISPLAY
This mode is used to check the VACS level.
Procedure:
1. Press
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Press [ERASE] button, [x] button and [ENTER] button si-
multaneously.
3. The fl uorescent indicator tube displays “VACSA”. “A” repre-
sents Conventional VACS (Triggered by signal level)
4. To release from this mode, do the step 2 again.
METER SWITCH TOUCH COUNT DISPLAY
This mode is used to display the total count of meter pointer touch
initial switch and max switch.
Procedure:
1. Press
initial switch and max switch.
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Press [x] button, [ENTER] button and [DISPLAY] button si-
multaneously.
3. The
fl uorescent indicator tube displays “IxxxxxMyyyyy”.
“I” represents the Initial Switch touch.
“xxxxx” represents the total count of Initial Switch touch.
(Maximum Value of “xxxxx” = 65535)
“M” represents the Max Switch touch.
“yyyyy” represents the total count of Max Switch touch.
(Maximum Value of “yyyyy” = 65535)
4. To release from this mode, do the step 2 again. The fl uorescent
indicator tube displays “MODE OUT”.
METER TEST MODE
This mode is used to check the meter device.
Procedure:
1. Press
Procedure:
1. Press
[
?/1
] button to turn on the system.
2. Press
[x] button, [ENTER] button and [METER MODE] but-
ton simultaneously and the message “TST MODE IN” appears
on the fl uorescent indicator tube.
on the fl uorescent indicator tube.
3. Meter Backlight LEDs, Meter Pointer LEDs, Power Illumina-
tor LEDs and fl uorescent indicator tube are lighted up.
4. When you want to perform count total step from Initial Switch
to Max Switch operation mode, press [M] button. The me-
ter pointer will move from Initial Switch to Max Switch and
fi nally move back to the middle position. The total step count
information appears on the fl uorescent indicator tube. “xxx
STP yy” is shown.
ter pointer will move from Initial Switch to Max Switch and
fi nally move back to the middle position. The total step count
information appears on the fl uorescent indicator tube. “xxx
STP yy” is shown.
“xxx” represents the total step.
(Value of “xxx” should between 430 steps to 470 steps)
“yy” represents the status of total step count.
(If total step between 430 steps to 470 steps, “yy” is OK, Else
“yy” is NG)
“yy” is NG)
5. When you want to perform count total step from Max Switch
to Initial Switch operation mode, press [m] button. The me-
ter pointer will move from Max Switch to Initial Switch and
fi nally move back to the middle position. The total step count
information appears on the fl uorescent indicator tube. “xxx
STP yy” is shown.
ter pointer will move from Max Switch to Initial Switch and
fi nally move back to the middle position. The total step count
information appears on the fl uorescent indicator tube. “xxx
STP yy” is shown.
“xxx” represents the total step.
(Value of “xxx” should between 430 steps to 470 steps)
“yy” represents the status of total step count.
(If total step between 430 steps to 470 steps, “yy” is OK, else
“yy” is NG).
“yy” is NG).
6. To release from this mode, do the step 2 again. The fl uorescent
indicator tube displays “TST MODE OUT”.
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