Sharp XL-3000 (serv.man4) Service Manual ▷ View online
– 9 –
XL-3000H
(C1) x1
ø3 x8mm
ø3 x8mm
(E2) x6
ø3 x8mm
ø3 x8mm
(E2) x1
ø3 x14mm
ø3 x14mm
(C1) x1
ø3 x6mm
ø3 x6mm
(D1) x1
(E1) x1
Power PWB
Holder PWB
Tuner PWB
Main PWB
(C2) x1
Tuner PWB
(C2) x1
Main PWB
Bottom Cabinet
Figure 9-1
Figure 9-2
(G1) x4
ø2.5 x10mm
ø2.5 x10mm
(H1) x1
ø3 x8mm
ø3 x8mm
(H2) x1
(H5) x1
(H4) x2
ø2.5 x10mm
ø2.5 x10mm
(J1) x1
ø2.5 x10mm
ø2.5 x10mm
(F1) x4
ø2.5 x10mm
ø2.5 x10mm
Hook
(F2) x4
(F2) x4
Display PWB
LED PWB
Switch PWB
Gear Box
CD Mechanism
Bracket
Top Cabinet
Holder PWB
(H3) x1
1
Speaker
1. Net Frame ........... (A1) x1
9-3
2. Front Panel ......... (A2) x1
3. Screw .................. (A3) x6
3. Screw .................. (A3) x6
STEP
REMOVAL
PROCEDURE
FIGURE
( A3 ) x2
ø4 x12mm
( A3 ) x4
ø4 x12mm
Tweeter
Woofer
Net Frame
( A1 ) x1
( A1 ) x1
Front Panel
( A2 ) x1
( A2 ) x1
Screwdriver
Figure 9-3
XL-3000H
– 10 –
How to remove the CD lid (See Fig. 10-1.)
Perform steps 1,2 and 8 of the disassembly method to remove
the gear box.(See page 8,9)
1. Remove the switch PWB.
2. Remove the screws (A1) x 4 pcs., to remove the gear box
2. Remove the screws (A1) x 4 pcs., to remove the gear box
lid.
3. Remove the gears (A2) x 1 pc. and (A3) x 1 pc.
4. Remove the screws (A4) x 2 pcs., to remove the motor.
Caution:
Be careful so that the gear is not damaged.
(The damage gear emits noise during searching.)
4. Remove the screws (A4) x 2 pcs., to remove the motor.
Caution:
Be careful so that the gear is not damaged.
(The damage gear emits noise during searching.)
REMOVING AND REINSTALLING THE MAIN PARTS
Figure 10-1
Figure 10-2
(A1) x4
ø2.5 x12mm
ø2.5 x12mm
(A2) x1
(A3) x1
(A4) x2
ø2 x5mm
ø2 x5mm
Switch PWB
CD Lid Motor
CD MECHANISM SECTION (See Fig. 10-2.)
Perform steps 1,2 and 7 of the disassembly method to remove
the CD mechanism.
1. Remove the mechanism cover, paying attention to the
the CD mechanism.
1. Remove the mechanism cover, paying attention to the
pawls (A1)x 4 pcs.
2. Remove the screws (A2) x 2 pcs., to remove the shaft (A3)
x 1 pc.
3. Remove the stop washer (A4) x 1 pc., to remove the gear
(A5) x 1 pc.
4. Remove the pickup.
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 pretect the optical pickup
from electrostatic damage.
(A5) x 1 pc.
4. Remove the pickup.
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 pretect the optical pickup
from electrostatic damage.
Pickup unit
(A2) x2
ø2.6 x6mm
ø2.6 x6mm
(A1) x4
CD Mechanism
Shaft
(A3) x1
(A3) x1
Gear
(A5) x1
(A5) x1
Stop Washer
(A4) x1
(A4) x1
Mechanism Cover
– 11 –
XL-3000H
ADJUSTMENT
TUNER SECTION
AM
GND
FM
75
OHMS
ANTENNA
TERMINAL
TERMINAL
SO301
T302
FE301
T306
IC303
T351
VR351
TP301
FM Mute
Level
Level
AM Band
Coverage fL
Coverage fL
AM
Tracking fL
Tracking fL
AM IF
IC302
20
TUNER PWB-A2
Adjusting
Parts
Display
Frequency
• Setting the Test Mode
Keeping the FF/FWD button and MEMORY/SET button
pressed, turn on ON/STAND-BY. Then, the frequency is
initially set in the memory as shown in Table. Call it with the
VOLUME UP/DOWN button to use it for adjustment and check
of tuner circuit.
Keeping the FF/FWD button and MEMORY/SET button
pressed, turn on ON/STAND-BY. Then, the frequency is
initially set in the memory as shown in Table. Call it with the
VOLUME UP/DOWN button to use it for adjustment and check
of tuner circuit.
Preset No.
FM
Preset No.
AM
1
87.50 MHz
6
522 kHz
2
108.00 MHz
7
1,620 kHz
3
98.00 MHz
8
990 kHz
4
90.00 MHz
9
603 kHz
5
106.00 MHz
10
1,404 kHz
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Signal generator: 1 kHz, 40 kHz dev., FM modulated
*1. Adjust so that an output signal appears.
Check Point
Instrument
Connection
Display
Frequency
87.5 MHz
87.5 MHz
2.2 V
±
0.7 V
TP301
108 MHz
108 MHz
7.3 V
±
1.0 V
TP301
• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Signal generator: 1 kHz, 40 kHz dev., FM modulated
98.00 MHz
98.00 MHz
VR351*1
Input: SO301
(30 dB
µ
V)
Output: Speaker
Terminal
Terminal
Instrument
Connection
*1. Input: Antenna,
Output: Speaker Terminal
*2. Input: Input is not connected,
Output: TP301
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
AM IF
450 kHz
1,620 kHz
T351
*1
AM Band
—
522 kHz
(fL): T306
*2
Coverage
1.1
±
0.1 V
AM
990 kHz
990 kHz
(fL): T302
*1
Tracking
fL: Low-range frequency
fH: High-range frequency
fH: High-range frequency
Signal generator: 400 Hz, 30%, AM modulated
• AM IF/RF
Figure 11-1 ADJUSTMENT POINTS
XL-3000H
– 12 –
3
4
2
7
1
5
6
11
10
14
15
12
13
16
9
8
Vdda
Vssa
MPXIN
TEST
TEST
CLK(4.332MHz)
OSC
XIN
XOUT
RDS-ID/
READY
RST
MODE
RDCL
RDDA
Vssd
Vddd
PLL
(57kHz)
CLOCK
RECOVERY
(1187.5Hz)
DATA
DECODER
RAM
(128-bits)
RDS-ID
DETECT
REFERENCE
VOLTAGE
ANTIALISING
FILTER
57kHz
BPF
(SCF)
SMOOTHING
FILTER
VREF
VREF
FLOUT
CIN
IC521 VHiLC72723M-1: RDS Circuit (LC72723M)
1
VREF
Reference voltage output (Vdda/2).
2
MPXIN
Baseband (multiplexed) signal input.
3
Vdda
Analog power supply (+5V).
4
Vssa
Analog ground.
5
FLOUT
Subcarrier output (filter output).
6
CIN
Subcarrier input (comparator input).
7
TEST
Test input.
8
XOUT
Crystal oscillator output (4.332MHz).
9
XIN
Crystal oscillator input (external reference signal input).
10
Vssd
Digital ground.
11*
Vddd
Digital power supply (+5V).
12
MODE
Read mode setting (0 : master, 1: slave).
13
RST
RDS-ID/RAM reset (positive polarity).
14
RDDA
RDS data output.
15*
RDCL
RDS clock output (master mode)/ RDS clock input (slave mode).
16*
RDS-ID/
RDS-ID/READY output (negative polarity).
READY
Pin
No.
No.
Port
Name
Function
RDS
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not
connected to the outside.
connected to the outside.
Using the Radio Data System (RDS)
RDS is a broadcasting service which a growing number of FM stations provide.
These FM stations send additional signals along with their regular programme
signals. They send their station names, and information about the type of pro-
gramme such as sports or music, etc.
When tuned to an RDS station, "RDS" and the station name will be displayed.
"TP" (Traffic Programme) will appear on the display when the received broadcast car-
ries traffic information, and "TA" (Traffic Announcement) will appear whilst a traffic
information is on air.
"EON" will appear whilst the EON (Enhanced Other Networks information) data is
broadcast.
These FM stations send additional signals along with their regular programme
signals. They send their station names, and information about the type of pro-
gramme such as sports or music, etc.
When tuned to an RDS station, "RDS" and the station name will be displayed.
"TP" (Traffic Programme) will appear on the display when the received broadcast car-
ries traffic information, and "TA" (Traffic Announcement) will appear whilst a traffic
information is on air.
"EON" will appear whilst the EON (Enhanced Other Networks information) data is
broadcast.
You can control the RDS by using the remote control only.
■
Information provided by RDS
Each time the DISPLAY button is pressed, the display will switch as
follows:
follows:
When you are tuning in to a station other than an RDS station or to an RDS station
which sends weak signal, the display will change in the following order:
which sends weak signal, the display will change in the following order:
Station name (PS)
Programme type (PTY)
Frequency
NO PS
NO PTY
FM 98.80 MHz
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