Sharp XL-70-V Service manual
XL-70V
SERVICE MANUAL
No. S0082XL70V///
VIDEO CD MICRO SYSTEM
NTSC/PAL
MODEL
XL-70V Video CD Micro System consisting of XL-70V (main unit) and
CP-XL70U (speaker system).
• In the interests of user-safety the set should be restored to its original
condition and only parts identical to those specified should be used.
This Service Manual is for the XL-70V, which is a minor-modification
model of the XL-30V. This manual, therefore, describes only the
changed points from the service manual. Please refer to the XL-30V
service manual (No.S0081XL30V///) together with this manual.
XL-30V
REMOVING AND REINSTALLING THE MAIN PARTS ......
ADJUSTMENT................................................................ 12
WAVEFORMS OF CD CIRCUIT..................................... 41
TROUBLESHOOTING (CD SECTION) .......................... 42
FUNCTION TABLE OF IC .............................................. 49
XL-70V
Page
10
CONTENTS
Page
SAFETY PRECAUTION FOR SERVICE MANUAL ............................................................................................................ 2
VOLTAGE SELECTION...................................................................................................................................................... 2
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR .................................................................................................. 2
SPECIFICATIONS .............................................................................................................................................................. 3
NAMES OF PARTS ............................................................................................................................................................ 4
OPERATION MANUAL ....................................................................................................................................................... 6
DISASSEMBLY................................................................................................................................................................... 8
TEST MODE .................................................................................................................................................................... 10
ERROR LIST.................................................................................................................................................................... 12
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 14
TYPES OF TRANSISTOR AND LED............................................................................................................................... 14
VOLTAGE ........................................................................................................................................................................ 15
BLOCK DIAGRAM ........................................................................................................................................................... 16
SCHEMATIC DIAGRAM .................................................................................................................................................. 22
WIRING SIDE OF P.W.BOARD....................................................................................................................................... 31
FUNCTION TABLE OF IC................................................................................................................................................ 36
LCD SEGMENT ............................................................................................................................................................... 38
PARTS GUIDE/EXPLODED VIEW
This document has been published to be used
SHARP CORPORATION
– 1 –
for after sales service only.
The contents are subject to change without notice.
XL-70V
SAFETY PRECAUTION FOR SERVICE MANUAL
Precaution to be taken when replacing and servicing the Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class 1 Requirements.
However, the following precautions must be observed during servicing to protect your eyes against exposure to the Laser beam
(1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position outer than
the lead-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens.
(2) The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior to shipping.
(3) No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup Lens at any time.
(5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
CAUTION
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
● This Video CD Micro System is classified as
a CLASS 1 LASER product.
● The CLASS 1 LASER PRODUCT label is located on the rear cover.
● Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation
exposure.
Laser Output: max. 0.6 mW
As the laser beam used in this compact disc
player is harmful to the eyes, do not attempt
to disassemble the cabinet. Refer servicing
to qualified personnel only.
CAUTION-INVISIBLE LASER RADIA TION WHEN OPEN. DO NOT STARE INTO
BEAM OR VIEW DIRECTL Y WITH OPTICAL INSTRUMENTS.
V ARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA
EJ IN I STRALEN OCH BETRAKTA EJ STRALEN MED OPTISKA INSTRUMENT.
ADVERSEL-USYNLIG LASERSTRALING VED ABNING. SE IKKE IND I
STRALEN-HELLER IKKE MED OPTISKE INSTRUMENTER.
V ARO! AVATTAESSA OLET ALTTIINA NAKYMATON LASERSATEILYLLE.
ALA TUIJOT A SATEESEEN ALAKA KATSO SITA OPTISEN LAITTEEN LAPI.
V ARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD.
STIRRA EJ IN I STRALEN OCH BETRAKT A EJ STRALEN GENOM OPTISKT
INSTRUMENT.
ADVERSEL-USYNLIG LASERSTRALING NAR DEKSEL APNES. STIRR IKKE
INN I STRALEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER.
VOLTAGE SELECTION
Before operating the unit on mains, check the preset voltage. If the voltage is different from your local voltage, adjust the voltage
as follows. Turn the selector with a screwdriver until the appropriate voltage number appears in the window (110/127/220/230240V AC).
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
QACCA0001SJ00
QACCE0001SJZZ
QACCB0001SJ00
QPLGA0253AFZZ
– 2 –
XL-70V
XL-70V
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
SPECIFICATIONS
● General
Power source: AC 110/127/220/230-240V,
50/60 Hz
Power
consumption: 55 W
Dimensions: Width; 160 mm (6-5/16")
Height; 241 mm (9-1/2")
Depth; 298 mm (11-3/4")
Weight: 4.3 kg (9.5 lbs.)
● Amplifier section
Output power: MPO; 60 W (30 W + 30 W)
(10 % T.H.D.)
RMS; 40 W (20 W + 20 W)
(10 % T.H.D.)
Output terminals: Speakers; 4 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
Video out: 1 Vp-p (75 ohms)
Input terminals: Video/Auxiliary (audio signal);
500 mV/47 kohms
● Video CD section
Video output
format:
PAL / NTSC
● Cassette deck section
Frequency
response: 50 - 14,000 Hz (Normal tape)
Signal/noise ratio: 50 dB
Wow and flutter: 0.25 % (WRMS)
● Tuner section
Frequency range: FM; 88-108 MHz
AM; 531-1,602 kHz
CP-XL70U
Type: 2-way [10 cm (4") woofer and
2.5 cm (1") semidome tweeter]
Rated input
power: 20 W
Maximum input
power: 40 W
Impedance: 4 ohms
Dimensions: Width; 160 mm (6-5/16")
Height; 240 mm (9-1/2")
Depth; 189 mm (7-1/2")
Weight: 2.3 kg (5.1 lbs.)/each
● Compact disc player section
Type: Compact disc player
Signal readout: Non-contact, 3-beam semi-
conductor laser pickup
D/A converter: 1-bit D/A converter
Filter: 8-times oversampling digital
filter
Frequency
response: 20 - 20,000 Hz
Wow and flutter: Unmeasurable
(less than 0.001% W. peak)
Specifications for this model are subject to change without
prior notice.
– 3 –
XL-70V
XL-70V
NAMES OF PARTS
■ Front panel
1. Timer Indicator
2. Record Indicator
3. Sleep Indicator
4. (VCD/CD) Random Indicator
5. (VCD/CD/TUNER) Memory Indicator
6. FM Stereo Mode Indicator
7. (VCD/CD) Play Indicator
8. (VCD/CD) Repeat Indicator
9. FM Stereo Indicator
10. Surround Indicator
11. VCD/CD Compartment
12. On/Stand-by Button
13. Surround Button
14. (VCD/CD) Open/Close Button
15. Remote Control Sensor
16. Volume Select Button
17. (VCD) Stop/Return Button
(CD/TAPE) Stop Button
(TUNER) Memory Clear Button
18. (TAPE) Record Pause Button
19. Bass/Treble Selector Button
20. Memory/Set Button
21. Clock/Timer/Sleep Button
22. Band Selector Button
23. (VCD) Skip/Previous Button
(CD) Track Down Button
(TAPE) Rewind Button
(TUNER) Tuning Down Button
24. Function Selector Button
25. Headphones Socket
26. (VCD/CD/TAPE) Play Button
27. Volume/Jog Dial
28. (VCD) Skip/Next Button
(CD) Track Up Button
(TAPE) Fast Forward Button
(TUNER) Tuning Up Button
29. Volume/Jog Dial Selector Button
30. Cassette Compartment
7
11
12
13
17
18
19
20
21
22
23
24
25
1
23
8
5
4
6
9
10
14
15
16
26
27
28
29
30
■ Rear panel
1. Voltage Selector
2. AC Power Input Socket
3. FM 75 ohms Aerial Socket
4. AM Loop Aerial Socket
5. Video/Auxiliary (Audio Signal) Input Sockets
6. Video Output Socket
7. Speaker Terminals
– 4 –
1
2
3
4
5
6
7
■ Remote control
1. Remote Control Transmitter LED
2. Timer Button
3. (VCD/CD) Audio Mode Button
4. (VCD/CD) Direct Search Buttons
5. (VCD/CD) Display Button
6. (VCD) Video Intro Button
7. Sleep Button
8. On/Stand-by Button
9. (VCD) TV Type Button
10. (VCD) Track Digest Button
11. (VCD) Time Search Button
12. (VCD/CD) Memory Button
13. (VCD/CD) Clear Button
14. (VCD/CD) Random Button
15. (VCD) Playback Control Auto/Off Button
16. (VCD) Skip/Previous Button
(CD) Track Down Button
17. (VCD) Skip/Next Button
(CD) Track Up Button
18. (VCD/CD) Repeat Button
19. (VCD/CD) Pause Button
20. (VCD/CD) Review Button
(TAPE) Rewind Button
21. (VCD/CD) Cue Button
(TAPE) Fast Forward Button
22. (VCD) Stop/Return Button
(CD/TAPE) Stop Button
23. (VCD/CD/TAPE) Play Button
24. (TAPE) Record Pause Button
25. Surround Button
26. Function Buttons
27. Treble Buttons
28. Bass Buttons
29. (TUNER) Preset Up/Down Buttons
30. Volume Up/Down Buttons
26
27
28
XL-70V
1
2
3
7
8
4
9
5
6
12
13
14 15
10
11
16 17 1918
20 21
24
25
22 23
29
30
CP-XL70U
1. Tweeter
2. Woofer
3. Bass Reflex Duct
4. Speaker Wire
– 5 –
1
2
3
4
XL-70V
■ AM/FM interval (span)
OPERATION MANUAL
Press the ON/STAND-BY button to turn the
power on.
The International Telecommunication Union (ITU)
has established that member countries should
maintain either a 10 kHz or a 9 kHz interval be-
tween broadcasting frequencies of any AM station.
The illustration shows the 9 kHz interval zones (re-
gions 1 and 3), and the 10 kHz interval zone (re-
gion 2).
This product is not equipped with a span selector.
However, it will be adjusted to 9 kHz AM interval
(50 kHz FM interval) when shipped from the fac-
tory.
Before using the unit, be sure to set it for the AM
tuning interval (span) used in your area.
To check the tuning span currently selected:
1
Press the FUNCTION button until “FM” or
“AM” appears in the display.3Press the BAND button to select the AM
band.
radio has been adjusted for a 9 kHz span. If “AM
530 kHz” is displayed, it means that the radio
2
has been adjusted for a 10 kHz span.
● If “AM 531 kHz” is displayed, it means that the
Press the ON/STAND-BY button to enter the
stand-by mode.
Hold down the button and the MEMORY/
SET button for at least 4 seconds. Release
the buttons when “AM SP 10 kHz” and “FM
1
T o change from a 9 kHz AM (50 kHz FM) interval
to a 10 kHz AM (100 kHz FM) interval:
2
SP 100 kHz” are displayed alternately.
Press the ON/STAND-BY button to enter the
stand-by mode.
1
● The unit will return to the clock display.
To return to a 9 kHz AM (50 kHz FM) interval:
Hold down the button and the MEMORY/SET button for at least 4 seconds. Release
the buttons when “AM SP 9 kHz” and “FM
SP 50 kHz” are displayed alternately.
2
● The unit will return to the clock display.
span has been switched and AC power lead dis-
Caution:
● When the unit is left for a few hours after the
memorised will be cancelled.
connected, it will be automatically returned to a
9 kHz span. If this happens, set the span again.
● When the span is switched, any stations that are
(Continued)
battery terminals.
-
ON/
STAND-BY
BAND
SET
MEMORY/
15
FUNCTION
15
kHz
kHz
kHz kHz
kHz
kHz
kHz kHz
them towards the
■ Remote control
Connecting the AC power lead
PREPARATION FOR USE
unit to malfunction.
● When inserting or removing the batteries, push
● Installing the batteries incorrectly may cause the
1
230Vı240V
RATED
LINE VOLTAGE
0.2m - 6m
(8"- 20')
or similar)
● 2 “AA” size batteries (UM/SUM-3, R6, HP-7
2
To an AC socket.
Check the setting of the AC voltage selector located
on the rear panel before plugging the unit into an
– 6 –
dicated in the battery compartment.
same time.
unit will not be used for long periods of time. This
Precautions for battery use:
● Insert the batteries according to the direction in-
● Replace all old batteries with new ones at the
C socket. If necessary, adjust the selector to cor-
urn the selector with a screwdriver until the ap-
propriate voltage number appears in the window
respond to the AC power voltage used in your area.
(110/127/220/230 - 240V AC).
Selector adjustment:
will prevent potential damage due to battery leak-
● Do not mix old and new batteries.
● Remove the batteries if they are weak or if the
the unit is not to be used for a prolonged period
of time.
Notes:
● Unplug the AC power lead from the AC socket if
age.
Caution:
Do not use rechargeable batteries (nickel-cadmium
battery, etc.).
plied.
Otherwise, a malfunction or an accident may
occur.
● Never use a power lead other than the one sup-
reduced or if the operation becomes erratic.
remote control and the sensor on the main unit
with a soft cloth.
light may interfere with operation. Change the
lighting or the direction of the unit.
Notes concerning use:
● Replace the batteries if the operating distance is
● Periodically clean the transmitter LED on the
● Exposing the sensor on the main unit to strong
).
1
is used, connect the unit
2
● AC Plug Adaptor
In areas (or countries) where an AC socket as
shown in illustration
using the AC plug adaptor supplied with the unit,
as illustrated. The AC plug adaptor is not included
in areas where the AC wall socket and AC power
plug can be directly connected (see illustration
excessive heat, shock, and vibrations.
● Keep the remote control away from moisture,
Press the ON/STAND-BY button to enter the
stand-by mode.
Unplug the AC power lead from the AC IN-
PUT socket on this unit.
Whilst pressing down the MEMORY/SET but-
ton and the button, plug the AC power lead
and timer settings, and tuner and CD presets).
Reset the microcomputer under the following
conditions:
● To erase all of the stored memory contents (clock
● If the display is not correct.
● If the operation is not correct.
1
2
into the AC INPUT socket on this unit.
3
AC INPUT
stored in memory, such as clock and timer set-
Caution:
● The operation explained above will erase all data
2,3
3
XL-70V
tings, and tuner and CD presets.
1
RESETTING THE MICROCOMPUTER
Press the MEMORY/SET button.
6
3
the time will increase by 1 minute. When it is
turned one click anti-clockwise, the time will de-
crease by 1 minute.
Keep turning the jog dial to change the time con-
tinuously.
Adjust the minutes by turning the jog dial.
7
● When the jog dial is turned one click clockwise,
utes advance from “59” to “00”.
● The hour setting will not advance even if min-
Jog dial
Press the MEMORY/SET button.
8
(Seconds are not displayed.)
● The clock starts operating from “0” seconds.
AC power supply is restored after a power fail-
ure occurs or after the AC power lead is discon-
nected.
If this happens, follow the procedure below to
Note:
● The clock display will flash on and off when the
change the clock time.
To change the clock time:
Perform steps 1 - 3 in the section “RESETTING
THE MICROCOMPUTER”.
Perform steps 1 - 8 above.
Perform steps 1, 2 and 5 - 8 above.
To change the time display mode:
➀
➁
CLOCK/TIMER/
SLEEP
SETTING THE CLOCK
In this example, the clock is set for the 24-hour
(0:00) system.
MEMORY/SET
Press the CLOCK/TIMER/SLEEP button.2Within 3 seconds, press the MEMORY/SET
button.3Turn the jog dial to select the time display mode.
(Main unit operation)
1
– 7 –
0:00 AM 12:00
(0:00 - 23:59)
“0:00” → The 24-hour display will appear.
(AM 12:00 - PM 11:59)
first installed or it has been reset.
Press the MEMORY/SET button.5Adjust the hour by turning the jog dial.
● Note that this can only be set when the unit is
“AM 12:00” → The 12-hour display will appear.
4
● When the jog dial is turned one click clockwise,
the time will increase by 1 hour. When it is turned
one click anti-clockwise, the time will decrease
by 1 hour.
Keep turning the jog dial to change the time con-
tinuously.
change automatically to “PM”.
● When the 12-hour display is selected, “AM” will
XL-70V
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the
wall outlet before starting to disassemble the unit.
3. Take off nylon bands or wire holders where they need
to be removed when disassembling the unit. After
servicing the unit, be sure to rearrange the leads
where they were before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
CD PWB
(A1)x1
ø3x10mm
Display
PWB
Front
Panel
(B2)x1
XL-70V
Top Cabinet
(B2)x1
(B2)x2
(A1)x1
ø3x10mm
(B2)x1
Main PWB
(B1)x1
ø3x10mm
(C1)x2
ø3x10mm
XL-70V
STEP REMOVAL
1 Side Panel
(Left/Right)
2 Top Cabinet 1. Screw .................. (B1) x1 8-1
3 Rear Panel 1. Screw .................. (C1) x3 8-1
4 Power Amp. PWB 1. Screw .................. (D1) x1 8-2
5 Main PWB/ 1. Screw .................. (E1) x4 8-3
Headphones PWB 2. Screw .................. (E2) x1
6 Jog Switch PWB 1. Socket ................. (F1) x1 8-3
7 Display PWB/ 1. Screw .................. (G1) x3 8-3
LED PWB 2. Screw .................. (G2) x3
(With Jog Motor 3. Bracket ................ (G3) x1
Holder) 4. Socket ................. (G4) x1
8 Front Panel 1. Screw .................. (H1) x1 8-3
9 Power PWB 1. Screw .................. (J1) x4 8-3
10 Tape Mechanism 1. Open the cassette holder. 9-1
11 Video PWB 1. Screw .................. (L1) x4 9-2
12 CD PWB/ 1. Screw .................. (M1) x7 9-2
Open Close Switch 2. Bracket ................ (M2) x3
PWB/CD Lid PWB 3. Socket ................. (M3) x4
(Note) 4. Hook .................... (M4) x1
13 CD Mechanism 1. Screw .................. (N1) x3 9-3
PROCEDURE
FIGURE
1. Screw .................. (A1) x8 8-1
2. Socket ................. (B2) x5
2. Screw .................. (C2) x2
2. Socket ................. (D2) x2
3. Bracket ................ (E3) x1
4. Socket ................. (E4) x3
5. Flat wire............... (E5) x1
6. Socket ................. (E6) x1
2. Screw .................. (F2) x2
5. Knob .................... (G5) x1
6. Hook .................... (G6) x2
7. Hook .................... (G7) x2
2. Socket ................. (H2) x1
3. Screw .................. (H3) x1
2. Screw .................. (J2) x1
3. Screw .................. (J3) x1
4. Bracket ................ (J4) x1
2. Screw .................. (K1) x4
2. Socket ................. (L2) x3
2. Screw .................. (N2) x3
Note:
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector remove to protect the optical pickup
from electrostatic damage.
(C2)x2
ø3x8mm
Power
PWB
(G5)x1
Display PWB
Front Panel
Jog Switch
PWB
(F2)x2
ø2.5x12mm
Jog Motor
Holder
Tape
Mechanism
PWB
(G4)x1
(H3)x1
ø3x6mm
(E4)x1
Power PWB
(F1)x1
LED PWB
(J3)x1
ø3x6mm
(A1)x2
ø3x10mm
(D1)x1
ø3x8mm
(D2)x2
Power Amp.
PWB
(E4)x1
(G7)x2
Power
PWB
(J4)x1
Rear Panel
Side Panel (Right)
Figure 8-1
Main PWB
Figure 8-2
(G2)x2
ø2.5x10mm
(G6)x2
(G3)x1
(E4)x1
(H1)x1
ø3x8mm
(J2)x1
ø3x10mm
(E5)x1
Side Panel
(Left)
(C1)x1
ø3x10mm
Power
PWB
(E6)x1
(E1)x1
ø3x8mm
Headphones
PWB
(E1)x1
ø3x8mm
(H2)x1
Main PWB
(G2)x1
ø2.5x10mm
(E3)x1
(G1)x3
ø2.5x14mm
(J1)x4
ø4x6mm
(A1)x4
ø3x10mm
(E1)x2
ø3x10mm
(E2)x1
ø3x8mm
– 8 –
Sub Power
Transformer
Figure 8-3
XL-70V
(A1)x1
(A3)x1
(A4)x4
ø3x12mm
Woofer
Tweeter
(A2)x4
ø4x20mm
Speaker Box
Front Panel
Open
Cassette
Holder
(L1)x4
ø2x10mm
Video PWB
(M1)x4
ø2.5x14mm
(M2)x1
CD PWB
(M3)x1
Figure 9-1
(L2)x1
(M2)x1
Tape
Mechanism
(K1)x4
ø2.5x10mm
(M2)x1
(M3)x2
(L2)x2
(M1)x2
ø2.5x8mm
CP-XL70U
STEP REMOVAL
1 Woofer/Tweeter 1. Net Frame ........... (A1) x1 9-4
PROCEDURE
2. Screw .................. (A2) x4
3. Woofer Ring ........ (A3) x1
4. Screw .................. (A4) x4
Figure 9-4
FIGURE
(M1)x1
ø2.5x10mm
(M4)x1
Open/Close
Switch PWB
CD Motor PWB
(N1)x3
ø2.5x10mm
CD Lid
Motor
Holder
(M3)x1
Figure 9-2
CD Lid
Motor
CD Lid
PWB
Top Cabinet
CD Mechanism
(N2)x3
ø2.5x10mm
PWB
Washer x3
CD Mechanism
Figure 9-3
Top Cabinet
– 9 –
XL-70V
TEST MODE
The test mode applied to this microcomputer has three modes, namely ordinary test mode to be used for adjustment or
measurement, aging test mode to be used for aging test, and self-diagnosis test mode for self-inspection in case of final product
inspection.
1. Turning on the test mode
To turn on the specific test mode, press the POWER button, holding down the following two buttons in the ordinary stand-by
mode (power off state). In this case only the main unit button is valid. Even when the POWER of remote control button is set
to on, the test mode is not turned on.
[Ordinary test mode]
1. Tuner Test Mode (TEST 2)............................... Volume/JOG Dial Selector + Volume Select
2. Electronic volume Test Mode (TEST 3) ........... REW/REV + FF/FWD
3. Timer Test Mode (TEST 4) ............................... FUNCTION + Volume Select
4. LCD Test Mode (TEST 5) ................................. FUNCTION + FF/FWD
[Self-diagnosis test mode]
1. Button input diagnosis test mode (TEST 6)...... REW/REV + Volume Select
2. Tuner Test Mode (TEST 2)
1. Outline of tuner (radio) test mode
The tuner test mode is intended to store the adjustment and measurement frequencies in the preset memory CH without
frequency setting by adjusting personnel when the tuner section is adjusted in the production line.
2. Details of tuner test mode
When the power is turned on by using the "POWER" button while the "Volume/JOG Dial Selector" and "Volume Select"
buttons are held down in POWER OFF state, the frequency for adjustment and measurement of destination specified by the
AREA terminal is preset and stored in the preset memory CH. However, Ordinary 1 and Ordinary 2 are set to the designation
(destination selected by SPAN switching operation) set when the test mode is set. (As for frequencies to be preset and stored
for each destination, refer to item 3.)
The tuner test mode is started from preset No.1.
The operations of test mode are identical with the ordinary operations of TUNER function. However, FUNCTION switching
is invalid.
Since it is necessary to discard the content of preset memory when the tuner test mode is ended, "0000" or "1111" bits are
written in the memory to be checked in case of memory check (in case of initial setting) so that memory abnormality is detected
in case of initial setting so as to ensure memory initialization.
When the tuner test mode is turned on, the following indication lights for one second.
• The TUNER TEST 2 mode is set as a result of Volume Select + POWER. -> IF AC is set to OFF in the TEST 2 mode, the initial
state is restored.
When POWER is set to OFF, the memory of TEST 2 mode is protected.
When the power is turned on again, the ordinary operation is enabled while the data is stored in the
memory (besides TUNER).
If AC OFF state is maintained in this state for about 1/2 day, start is executed in the initial state.
• To clear the whole memory, insert the AC cord, holding down MEMORY + PLAY.
– 10 –
3. Preset frequencies for various destinations (random preset memory)
XL-70V
Ordinary 1, ChinaCH
1 FM 87.50 MHz
2 FM108.00 MHz
3 FM STEREO FM 98.00 MHz
4 FM 90.00 MHz
5 FM106.00 MHz
6 AM 531 kHz
7 AM1602 kHz
8 AM AM 990 kHz
9 AM 603 kHz
10 AM1404 kHz
11
12
13 LW
14
15
• The hatched sections of the table are not stored in memory.
16
17
18
19
20
21
22
23
24
25
26 FM106.00 MHz
27 FM 90.00 MHz
28 FM MONO FM 98.00 MHz
29 FM108.00 MHz
30 FM 87.50 MHz
3. Electronic volume Test Mode (TEST 3)
When the test mode is set, the following indication lights for one second.
BAND
Ordinary 1, ChinaCHBAND
When this mode is set, BASS/TREBLE is set to 0 (0 dB) and SURROUND mode is set to off, and start-up function is set to CD
when volume is -14 dB (STEP 17). The button operations in the test mode are the same as those of ordinary operation excepting
sound volume UP/DOWN.
(1) The indication is the same as that of ordinary operation excepting test mode setting.
(2) The sound volume control with the sound volume UP/DOWN button is only the following 3 steps unlike the ordinary state.
Volume- ∞ (STEP 0) <-> Volume-14 dB (STEP 23) <-> Volume-0 (STEP 30)
(3) BASS/TREBLE and SURROUND are switched when button operation is performed.
4. Timer test Mode (TEST 4)
When the test mode is set, the following indication lights for one second.
The current time and timer time are set in the following procedure to perform the timer playback.
1. Set the current time to 1:00, set the timer to ON time 1:02, set the function to Tape, and set volume STEP 8. One minute is
counted as one second, and the timer playback operation is performed. The fade-in (when playback is started) is executed
at a rate of one step for 0.5 sec. After completion of fade-in the fade-out is executed at a rate of one step for 0.5 sec (WAIT
1 sec inserted). After completion of fade-out the power is turned off (after WAIT 1 sec), and the mode is changed to the standby mode.
The indication during operation is the same as that of ordinary timer operation.
5. LCD Test Mode (TEST 5)
When the LCD test mode is set, all the LCD segments are lighted. After that the indication is changed as follows according to
the "PLAY" button input.
Lighting of all segments Lighting of odd segments Lighting of even segments
– 11 –
XL-70V
6. Button input diagnosis Test Mode (TEST 6)
When the test mode is set, the following indication appears.
This test mode is intended to check whether all the main unit buttons can be detected. Accordingly, in this test mode checking
as to whether the "POWER" button was pressed after all the buttons shown below were pressed is performed. If the result is
OK, is indicated. Even any one of keys was not pressed, an error is indicated. In case of OK termination or error termination
exit from this mode occurs when the "POWER" button is pressed next time, and the stand-by mode is set.
1. In case of "Review" + "Volume/Jog Dial Select Button"
The following 14 buttons are detected as all buttons.
The OK/NG indication of test result is as follows.
ERROR LIST
PU-IN SW detection error display
Error contents ............................ Displayed when the ON of detection SW could not be detected even after a certain period of time
passed, even though controlled to return the CD pickup to the most inside periphery in
microcomputer.
Major causes ............................. Failure of PU-IN SW or connection failure, and failure of slide motor or connection failure
Recovery method from error ..... Remove the cause of the error and turn on the power again.
CD Read error display
Error contents ............................ Displayed when the data of the DISC can not be read correctly, or can be read however the
standard of the disc is impossible to be played back.
Major cause ............................... The disc is back to front. Other disc than CD-DA/VCD1.1/VCD2.0 is inserted.
The flaw or contamination of the disc is great and the data cannot be read.
Recovery method from error ..... Open the CD cover and insert a correct disc correctly. Remove the contamination or flaw of the
disc.
NO DICS display
Error contents ............................ Displayed when impossible to focus on the disc.
Major cause ............................... The disc is back to front. Other disc than CD-DA/VCD1.1/VCD2.0 is inserted. The flaw or
contamination of the disc is great and the data cannot be read.
Recovery method from error ..... Open the CD cover and insert a correct disc correctly. Remove the contamination or flaw of the
disc.
– 12 –
XL-70V
TAPE mechanism error display (1)
Error contents ............................ Displayed when not becomes "ON" while the mechanism operating detection SW "CAM-SW" is
being operated even though the motor or solenoid are controlled to operate the tape for playback/
FF/REW/Recording.
Major cause ............................... When displayed even though the mechanism is working, failure of CAM-SW and connection
failure.
When the mechanism is not working, failure of the motor and solenoid and connection failure.
Recovery method from error ..... Remove the cause of the error and turn on the power again.
TAPE mechanism error display (2)
Error contents ............................ Displayed when the initialization cannot be completed, even though the microcomputer controls
the motor or the solenoid to initialize the tape mechanism (set the mechanism to the stop
condition.) (Mechanism operating detection SW "CAM-SW" is stopped and does not become
"OFF".)
Major cause ............................... When displayed even though the mechanism is working, failure of CAM-SW and connection
failure.
When the mechanism is not working, failure of the motor and solenoid and connection failure.
Recovery method from error ..... Remove the cause of the error and turn on the power again.
VCD unit communication error
Error contents ............................ The system computer cannot communicate with VCD unit microcomputer. Or can communicate
however the contents are not as specified in the specification.
Major cause ............................... VCD microcomputer or the CD servo microcomputer are in abnormal operation.
The power is not supplied to the VCD unit and CD servo unit.
The communication line between the system microcomputer and the VCD unit are short-circuit
or open.
Recovery method from error ..... Remove the cause of the error and turn on the power again.
– 13 –
XL-70V
NOTES ON SCHEMATIC DIAGRAM
• Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means pico-farad and the unit of the capacitor
without such a symbol is microfarad. As to electrolytic
capacitor, the expression “capacitance/withstand voltage”
is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
• Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.
REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION
NSW801 PICKUP IN ON—OFF
SW651 VOLTAGE SELECTOR 230-240V
SW700 JOG ON—OFF
SW709 ON/STAND-BY ON—OFF
SW710 CLOCK/TIMER/SLEEP ON—OFF
SW711 TUNING UP ON—OFF
SW712 PLAY/CD PAUSE ON—OFF
SW713 VOLUME SELECT ON—OFF
SW718 SURROUND ON—OFF
SW721 MEMORY/SET ON—OFF
SW722 BASS/TREBLE ON—OFF
• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chassis with no signal given.
1. In the tuner section,
( ) indicates AM
< > indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
( ) indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
• Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
SW723 BAND ON—OFF
SW724 REC. PAUSE ON—OFF
SW725 STOP/CLEAR ON—OFF
SW726 TUNING DOWN ON—OFF
SW727 FUNCTION ON—OFF
SW728 VOLUME JOG ON—OFF
SW730 CD LID OPEN/CLOSE ON—OFF
SW802 CD LID ON—OFF
SW901 FOOL PROOF ON—OFF
SW902 CAM ON—OFF
FRONT
VIEW
ECB
(S)(G)(D)
(1) (2) (3)
TYPES OF TRANSISTOR AND LED
2SA933 SR
2SB562 C
2SC2001 K
2SC535 C
2SD1858 R
2SK246 GR
KRA102 M
KRC102 M
KRC104 M
KRC107 M
KTA1266 GR
KTC3199 GR
FRONT
VIEW
BCE
2SD2012 Y
FRONT
VIEW
MPG3372X
HY2043
1 2 3
SVC348S
KDV147B
– 14 –
PIN
NO.
PIN
NO.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
1
2
3
4
5
6
7
8
9
VOLTAGE
2.5V
2.5V
2.5V
2.5V
0V
1.7V
3.3V
5V
2.5V
2.5V
0V
2.3V
2.4V
0V
0V
5V
5V
5V
5V
0.8V
—
5V
—
5V
0V
5V
5V
0V
0.3V
5V
0.2V
5V
5V
0V
—
5V
5V
5V
5V
3.9V
5V
—
0V
0V
0V
1.9V
0V
0V
5V
5V
IC804
VOLTAGE
6.4V
4.9V
1.6V
1.6V
2.8V
2.8V
0V
0V
0V
2.8V
2.8V
1.6V
1.6V
3.3V
5.7V
—
—
1.6V
1.6V
2.8V
2.8V
0V
0V
0V
2.8V
2.8V
1.6V
1.6V
1.6V
6.4V
IC701
PIN
NO.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
PIN
NO.
10
11
12
13
14
PIN
NO.
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
VOLTAGE
—
4.8V
4.8V
4.8V
4.8V
5V
5V
5V
—
5V
0V
0V
0V
0V
0V
—
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
IC17V
VOLTAGE
3.3V
4.6V
2.8V
3.7V
0V
0V
0V
0.2V
0.2V
0.3V
0.3V
0.1V
0.2V
5V
IC11V
VOLTAGE
6.1V
5.3V
5.3V
0V
5.3V
5.3V
6.1V
10.9V
PIN
NO.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
PIN
NO.
PIN
NO.
1
2
3
4
5
6
7
8
9
1
2
3
1
2
3
4
5
6
7
8
9
IC802
VOLTAGE
2.6V
2.5V
0V
2.6V
5V
3.3V
0V
0V
—
—
—
—
5V
5V
3.3V
1.6V
0V
1.1V
3.2V
1.6V
1.1V
0V
1.5V
1.6V
3.3V
1.6V
1.6V
0.7V
1.6V
0.7V
1.6V
1.6V
1.6V
1.6V
1.6V
1.3V
1.7V
0V
3.3V
1.6V
1.6V
0V
3.3V
0V
0V
1.4V
1.5V
3.2V
0V
1.3V
2.7V
1.3V
1.3V
0V
5V
0V
3.1V
2.7V
2.6V
2.5V
3.8V
2.8V
5V
5V
IC807
VOLTAGE
8V
0V
5V
IC805
VOLTAGE
0V
11.4V
0.4V
0V
—
11.4V
0.4V
3.2V
0V
PIN
NO.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
PIN
NO.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
VOLT AGE
IC806
VOLTAGE
2.5V
2.5V
2.7V
3.1V
3.8V
2.9V
—
—
5V
—
—
5V
0V
5V
1.7V
2.1V
0V
0V
—
—
—
—
0.5V
—
—
—
—
—
—
—
—
5V
—
—
—
—
—
—
—
5V
5V
5V
5V
5V
IC16V
VOLTAGE
5V
1.3V
2.9V
0.5V
0.4V
5V
2.7V
2.8V
1.5V
2.2V
—
—
3.5V
3.5V
—
1.8V
1.7V
1.8V
1.4V
5V
0V
1.8V
1.8V
1.7V
1.8V
1.8V
0.1V
3.3V
3.3V
—
1.3V
2.9V
0.7V
0.4V
0V
2.4V
2.4V
0.9V
2.4V
0V
PIN
NO.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
PIN
NO.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
VOLTAGE
0V
—
—
—
5V
3.5V
0V
1.2V
0V
3.5V
0V
2.7V
5V
0V
5V
5V
1.5V
—
2.1V
—
0.1V
1.8V
5V
5V
0V
0V
—
—
—
—
0V
5V
0V
—
—
—
0V
5V
—
—
0V
2.3V
0V
5V
2.3V
2.3V
2.3V
2.3V
—
—
IC10V
VOLTAGE
5V
3.4V
1.6V
1.6V
1.8V
1.8V
1.9V
1.9V
1.9V
2.0V
1.9V
1.7V
1.2V
1.3V
1.6V
0V
1.4V
1.4V
1.4V
1.5V
1.2V
0.3V
1.9V
0V
1.6V
1.6V
1.7V
1.3V
2.0V
3.2V
5V
5V
IC14V
PIN
NO.
100
PIN
NO.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
1
2
3
4
5
6
7
8
9
VOLTAGE
0V
1.3V
—
5V
2.3V
0V
0V
0V
5V
5V
0V
0V
0V
0.8V
2V
5V
—
—
—
—
2.4V
0V
5V
2.3V
0V
—
0V
5V
2.3V
2.2V
1.2V
4.5V
1.5V
4.8V
1.4V
1.0V
1.2V
1.9V
1.9V
5V
0V
2.3V
1.4V
0.6V
1.4V
0.8V
1.6V
0.8V
1.3V
0V
IC801
VOLTAGE
3.3V
1.6V
1.6V
1.6V
1.6V
0V
2.6V
0V
1.7V
1.6V
1.6V
0.7V
0.3V
1.6V
1.6V
1.6V
0.7V
1.6V
1.2V
1.3V
2.4V
1.1V
1.6V
0V
PIN
NO.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
1
2
3
4
5
6
7
8
9
VOLTAGE
3.6V
3.5V
3.5V
1.8V
1.7V
1.8V
1.4V
1.8V
1.8V
1.7V
1.8V
1.8V
1.3V
2.9V
0.5V
0.4V
2.7V
2.8V
1.5V
2.2V
1.3V
2.9V
0.7V
0.4V
2.4V
2.4V
0.9V
2.4V
5V
0V
3.6V
1.8V
0.6V
0.6V
2.3V
1.9V
1.9V
1.2V
1.0V
4.8V
4.5V
0.2V
2.2V
2.3V
5V
5V
0.2V
5V
0.2V
0V
IC15V
PIN
NO.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
VOLTAGE
3.6V
2.7V
3.5V
3.3V
1.2V
1.3V
1.6V
1.4V
1.4V
1.4V
1.5V
1.2V
3.5V
0V
0.3V
3.5V
3.5V
1.7V
1.9V
2.0V
1.9V
1.9V
1.9V
1.8V
1.8V
1.7V
1.6V
1.9V
1.6V
0V
5V
1.6V
1.3V
2.0V
1.6V
3.4V
3.2V
1.5V
0.1V
1.8V
2.1V
0.1V
0V
0V
5V
2.6V
0V
3.5V
3.0V
0V
XL-70V
– 15 –
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