Sony CX-LDB30 / CX-LDB50 / XR-DB30 / XR-DB50 Service Manual ▷ View online
17
CX-LDB30/LDB50
1
washer (3-1-0.4)
2
close lever spring
3
claw
4
shaft disc stop
5
close lever
1
tension coil spring (DIR)
6
Loosen the screw.
7
Hold the release lever
and change the direction.
2
capstan
retaining ring
3
gear pulley
4
gear (cap)
5
gear (IDL-A)
8
stopper
0
gear (IDL-B)
9
DIR lever
3-19. CLOSE LEVER
3-20. DIR LEVER, GEAR (IDL-B)
18
CX-LDB30/LDB50
3
gear (IDL-D)
2
two claws
1
gear (IDL-F)
7
gear (IDL-C)
6
claw
5
gear loading lever
4
three hooks
3-21. GEAR (IDL-C)
19
CX-LDB30/LDB50
[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.
the RAM to initial conditions. Execute this mode when
returning the set to the customer.
Procedure:
1. Press the ?/1 button to turn off the main power.
2. Press two buttons of [AUDIO IN] and ?/1 simultaneously for
2. Press two buttons of [AUDIO IN] and ?/1 simultaneously for
more than two seconds.
3. The fluorescent indicator tube does not display any message
and the set is reset.
[COMMON TEST]
*
This mode is used to check the function of the amplifier.
Procedure:
1. Press the ?/1 button to turn the set on.
2. Press two buttons of x and [DISPLAY] simultaneously for
2. Press two buttons of x and [DISPLAY] simultaneously for
more than two seconds.
3. The message “Volume MAX” is displayed, when the
[VOLUME] knob is rotated clockwise. The message “Volume
MIN” is displayed, when the [VOLUME] knob is rotated
counterclockwise.
MIN” is displayed, when the [VOLUME] knob is rotated
counterclockwise.
4. Each time the [BASS] or [TREBLE] knob is turned or Press the
[EQ] button (RM), the message “TONE MAX”, “TONE MIN”
or “TONE FLAT” is displayed in this order.
or “TONE FLAT” is displayed in this order.
[PANEL TEST]
*
The panel test, the version, and inducing is displayed.
Procedure:
1. Press the ?/1 button to turn off the main power.
2. Press two buttons of [AUDIO IN] and [DISPLAY] simultaneously
2. Press two buttons of [AUDIO IN] and [DISPLAY] simultaneously
for more than two seconds.
3. All lighting display is done.
4. 4-1. To enter the test mode, press the button [i-Bass]
4. 4-1. To enter the test mode, press the button [i-Bass]
simultaneously.
The version of the microcomputer is displayed.
The version of the microcomputer is displayed.
4-2. To enter the key test mode, press the button [PLAY MODE/
TUNING MODE] simultaneously.
The version of the microcomputer is displayed.
The version of the microcomputer is displayed.
5. Press two buttons of [AUDIO IN] and [DISPLAY] simultaneously
for more than two seconds, it ends.
[CD Repeat 5 Times Limit Release Mode]
Procedure:
1. Press the ?/1 button to turn the set on.
2. Select the FUNCTION to CD.
3. Press two buttons of Z CD and [PLAY MODE/TUNING MODE]
2. Select the FUNCTION to CD.
3. Press two buttons of Z CD and [PLAY MODE/TUNING MODE]
simultaneously for more than two seconds.
4. The repeat all mark blinks and then repeat 5 times limit is
released.
[CD Ship Mode and Memory clear]
*
This mode moves the optical pick-up to the position durable
to vibration and Memory Clear. Use this mode when returning
the set to the customer after repair.
to vibration and Memory Clear. Use this mode when returning
the set to the customer after repair.
Procedure:
1. Press the ?/1 button to turn the set on.
2. Set the FUNCTION to CD.
3. Press two buttons of Z CD and > simultaneously for
2. Set the FUNCTION to CD.
3. Press two buttons of Z CD and > simultaneously for
more than two seconds.
4. After a message “MECHA LOCK” is displayed on the
fluorescent indicator tube, the CD ship mode is set and the
power is turned off.
power is turned off.
[Disc anti-theft]
Procedure:
1. Press the ?/1 button to turn the set on.
2. Set the FUNCTION to CD.
3. Press two buttons of x and Z CD simultaneously for more
2. Set the FUNCTION to CD.
3. Press two buttons of x and Z CD simultaneously for more
than five seconds.
4. Press two buttons of x and Z CD simultaneously for more
than five seconds to turn the set off.
[CD ERROR CODE]
Procedure:
1. Press the ?/1 button to turn the set on.
2. Set the FUNCTION to CD.
3. Press two buttons of CD u and [DISPLAY] simultaneously
2. Set the FUNCTION to CD.
3. Press two buttons of CD u and [DISPLAY] simultaneously
for more than two seconds.
4. Switch the CDM/NO DISC using > , . .
Advance the number using > , Reverse the number using
. .
. .
[CD SERVICE MODE Mode]
*
This mode can run the CD sled motor freely. Use this mode,
for instance, when cleaning the pickup.
for instance, when cleaning the pickup.
Procedure:
1. Press the ?/1 button to turn the set on.
2. Set the FUNCTION to CD.
3. While depressing the CD u button, Press the [i-Bass] button.
2. Set the FUNCTION to CD.
3. While depressing the CD u button, Press the [i-Bass] button.
The message “SERVICE MODE” is displayed.
4. With the CD in stop status, press the > button to move the
pickup to outside track, or press the . button to inside
track.
track.
5. When press the CD u button, normal playback is
performed.
6. Each time the CD u button is pressed during normal
playback, the tracking servo is switched on or off.
7. To exit this mode, either change to other functions or extract
an AC plug.
[AM Channel Step 9 kHz/10kHz Selection Mode]
*
Either the 9 kHz step or 10 kHz step can be selected for the
AM channel step.
AM channel step.
Procedure:
1. Turn on the power, and press the [TUNER] button to select the
AMP band.
2. Turn off the power.
3
3
Press the > button and the ?/1 button at the same time to
enter this mode.
enter this mode.
SECTION 4
TEST MODE
20
CX-LDB30/LDB50
2.94 – 7.84 mN • m
(30 to 79 g • cm)
(0.42 – 1.11 oz • inch)
0.15 – 0.59 mN • m
(2 to 6 g • cm)
(0.03 – 0.08 oz • inch)
2.94 – 7.84 mN • m
(30 to 79 g • cm)
(0.42 – 1.11 oz • inch)
0.15 – 0.59 mN • m
(2 to 6 g • cm)
(0.03 – 0.08 oz • inch)
6.86 – 17.64 mN • m
(70 to 179 g • cm)
(0.98 – 2.49 oz • inch)
9.8 mN • m or more
(100 g • cm or more)
(1.4 oz • inch or more)
9.8 mN • m or more
(100 g • cm or more)
(1.4 oz • inch or more)
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
TAPE MECHANISM DECK SECTION
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 demag-
netizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to
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
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter
Meter reading
Record/Playback Head Azimuth Adjustment
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 1 dB of peak.
so that outputs match within 1 dB of peak.
DECK SECTION 0 dB=0.775V
Precaution
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
3. After the adjustments, apply suitable locking compound to
the parts adjusted.
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.)
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
Signal
Used for
Tape
P-4-A100
WS-48B
10 kHz, –10 dB
3 kHz, 0 dB
Azimuth Adjustment
Tape Speed Check
SECTION 5
MECHANICAL ADJUSTMENTS
SECTION 6
ELECTRICAL ADJUSTMENTS
set
MAIN board
SPEAKER terminal (J201)
L-CH, R-CH
SPEAKER terminal (J201)
L-CH, R-CH
+
–
–
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
Output
level
level
L-CH
peak
peak
R-CH
peak
peak
within
1dB
1dB
Screw
position
position
R-CH
peak
peak
Click on the first or last page to see other CX-LDB30 / CX-LDB50 / XR-DB30 / XR-DB50 service manuals if exist.