Sharp CD-DVD500 (serv.man22) Service Manual ▷ View online
– 17 –
CD-DVD500H
REMOVING AND REINSTALLING THE MAIN PARTS
TAPE MECHANISM SECTION
Perform steps 1 to 8 and 10 of the disassembly method to
remove the tape mechanism.
remove the tape mechanism.
How to remove the record/playback and erase
heads (TAPE 2) (See Fig. 17-1)
heads (TAPE 2) (See Fig. 17-1)
1. When you remove the screws (A1) x 2 pcs., the recording/
playback head and three-dimensional head of the erasing
head can be removed.
head can be removed.
How to remove the playback head (TAPE 1)
(See Fig. 17-2)
(See Fig. 17-2)
1. When you remove the screws (B1) x 2 pcs., the playback
head.
How to remove the pinch roller (TAPE 1/2)
(See Fig. 17-3)
(See Fig. 17-3)
1. Carefully bend the pinch roller pawl in the direction of the
arrow <A>, and remove the pinch roller (C1) x 1 pc., in the
direction of the arrow <B>.
direction of the arrow <B>.
Note:
When installing the pinch roller, pay attention to the spring
mounting position.
When installing the pinch roller, pay attention to the spring
mounting position.
How to remove the belt (TAPE 2)
(See Fig. 17-4)
(See Fig. 17-4)
1. Remove the main belt (D1) x 1 pc., from the motor side.
2. Remove the FF/REW belt (D2) x 1 pc.
2. Remove the FF/REW belt (D2) x 1 pc.
How to remove the belt (TAPE 1)
(See Fig. 17-4)
(See Fig. 17-4)
1. Remove the main belt (E1) x 1 pc., from the motor side.
2. Remove the FF/REW belt (E2) x 1 pc.
2. Remove the FF/REW belt (E2) x 1 pc.
How to remove the motor (See Fig. 17-5)
1. Remove the screws (F1) x 2 pcs., to remove the motor.
Figure 17-1
Figure 17-2
Figure 17-3
Figure 17-4
Figure 17-5
(A1)x2
Ø2 x 9mm
Ø2 x 9mm
TAPE 2
Record/Playback
Head
Head
Erase Head
Clutch Ass'y
(B1)x2
Ø2 x 9mm
Ø2 x 9mm
TAPE 1
Playback
Head
Head
Clutch Ass'y
Pinch Roller
(C1)x1
(C1)x1
<A>
<B>
Pinch
Roller
Pawl
Roller
Pawl
Pull
TAPE 2
TAPE 1
Main Belt
(E1)x1
Main Belt
(E1)x1
TAPE 2
Main Belt
(D1)x1
Main Belt
(D1)x1
TAPE 1
Main Belt
(D1)x1
(D1)x1
Main Belt
(E1)x1
(E1)x1
FF/REW
Belt
(D2)x1
Belt
(D2)x1
FF/REW
Belt
(E2)x1
Belt
(E2)x1
Motor
Motor
(F1)x2
Ø 2.6 x 5mm
Motor
Clutch Ass'y
CD-DVD500H
– 18 –
fL: Low-range frequency
fH: High-range frequency
• AM adjustment and confirmation
fH: High-range frequency
• AM adjustment and confirmation
Figure 18-3 AM IF
TUNER SECTION
• Setting the Test Mode
While holding down the MEMORY/SET button and the X-
BASS button, press the ON/STAND-BY button. Frequencies
are rewritten in memory as shown in table 18. Call them
using the VOLUME knob of tuner circuit adjustment and
check.
Note that once you reinitialize the settings, the frequencies
recorded by users will be changed.
While holding down the MEMORY/SET button and the X-
BASS button, press the ON/STAND-BY button. Frequencies
are rewritten in memory as shown in table 18. Call them
using the VOLUME knob of tuner circuit adjustment and
check.
Note that once you reinitialize the settings, the frequencies
recorded by users will be changed.
Preset No.
Frequency
P01
87.50 MHz
P06
522 kHz
P02
108.00 MHz
P07
1,620 kHz
P03
90.00 MHz
P08
603 kHz
P04
106.00 MHz
P09
1,404 kHz
P05
98.00 MHz
P10
990 kHz
Adjusting item
Adjusting object
Adjusting
method
IF
T351
Set IF waveform
Adjust the indication
450 kHz to maximum.
of set to 1,620 kHz.
Frequency cover
fL: T306 (522 kHz)
fL: 1.1
±
0.1 V
(VT line voltage of
Adjust the indication
fH: 8.0
±
1.3 V
TP301)
of set to 522 kHz.
(Only confirmation)
fH: (1,620 kHz)
Tracking
fL: T302 (990 kHz)
Set the output of
speaker terminal
to maximum.
speaker terminal
to maximum.
AM signal oscillator Frequency 400 Hz, 30 %, AM modulation
• FM mute level adjustment
Frequency
Adjusting
object
Adjusting
method
98.0 MHz
25 dB(EMF)
VR351
Input: SO301
Output: Speaker
Terminal
Output: Speaker
Terminal
FM signal oscillator Frequency 1 kHz, 40 kHz
Adjusting object
Preset No.
Frequency
Figure 18-2 FM Mute Level
Table 18
Electronic
Voltmeter
Voltmeter
GND
AM Loop Antenna
AM signal oscillator
Loop Antenna
UNIT
IF : Speaker Terminal
Frequency cover: TP301
Frequency cover: TP301
Electronic
Voltmeter
Voltmeter
UNIT
FM signal oscillator
SO301
Speaker
Terminal
Terminal
• Erasing the registered broadcast station
When the power is off, press and hold the TUNER (BAND)
button and the X-BASS button, and then press the POWER
button.
All the registered stations are erased.
When the power is off, press and hold the TUNER (BAND)
button and the X-BASS button, and then press the POWER
button.
All the registered stations are erased.
ADJUSTMENT
MECHANISM SECTION
•
Driving Force Check
Torque Meter
Specified Value
Play: TW-2111
Tape 1: Over 80 g
Tape 2: Over 80 g
Tape 2: Over 80 g
•
Torque Check
Torque Meter
Tape 2
Play: TW-2111
30 to 80 g.cm
30 to 80 g.cm
Fast forward: TW-2231
—
70 to 180 g.cm
Rewind: TW-2231
—
70 to 180 g.cm
Specified Value
Tape 1
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Normal
MTT-111
Variable
3,000
±
30 Hz
Speaker
speed
Resistor in
Terminal
motor.
(Load
resistance:
6 ohms)
resistance:
6 ohms)
•
Tape Speed
Figure 18-1
TAPE MECHANISM
Tape
Motor
Motor
Variable Resistor in motor
– 19 –
CD-DVD500H
DVD/CD SECTION
• Adjustment
Since this DVD/CD system incorporates the following
automatic adjustment functions, readjustment is not needed
when replacing the pickup. Therefore, different PWBs and
pickups can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.
automatic adjustment functions, readjustment is not needed
when replacing the pickup. Therefore, different PWBs and
pickups can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.
Figure 19 ADJUSTMENT POINTS
FE301
AM IF
T302
T306
T351
AM
TRACKING fL
AM BAND
COVERAGE fL
FM MUTE
LEVEL
MAIN PWB
CNP301
AM LOOP
ANTENNA
SO301
FM ANTENNA
TERMINAL
VR351
TP302
R350
R345
TP301
CD-DVD500H
– 20 –
TEST MODE
During POWER off mode, push below each 2 keys and [POWER] key.
Then go to each TEST MODE.
Then go to each TEST MODE.
KEY
TEST MODE
CONTENTS
[POWER] [TUN] + [X-BASS]
TEST 1
TUNER PRESET MEMORY CLEAR
[POWER] [MEMORY/SET] + [X-BASS]
TEST 2
TUNER PRESET FOR PRODUCTION
Test mode for the production and display
TEST 3
Test mode for the production
[POWER] [CD] + [X-BASS]
TEST 4
Ver. No Display (DVD Microcomputer)
Test mode for the production and display
TEST 5
Test mode for the production
[POWER] [>] + [X-BASS]
TEST 6
ALL CLEAR (RESET)
Test mode for the production and display
TEST 7
Test mode for the production
[POWER] [TUN DOWN] + [X-BASS]
TEST 8
PRODUCTION INITIALIZE FOR CHANGER
Test mode for the production and display
TEST 11
Test mode for the production
[POWER] [<<] + [X-BASS]
TEST 12
Ver. No DISPLAY (SYSTEM MICROCOMPUTER)
[POWER] [CD] + [G.EQ]
TEST 15
DVD MICROCOMPUTER (ROM Renewal Mode)
TEST MODE 1 (Write in, operation manual, open to user)
Work:
Clear all TUNER PRESET MEMORY.
Function: - TUNER
- BAND: FM ST
- FREQUENCY RECEIVE: F.L. (MINIMUM FREQUENCY)
- FREQUENCY RECEIVE: F.L. (MINIMUM FREQUENCY)
Figure:
The above figure: Displayed for about 1.0 sec
Other conditions: - Same as TEST MEMORY.
After Action: - Normal operation.
MEMORY
TUNER CL
RUN TEST 1
Clear all TUNER PRESET MEMORY.
Bring BAND SETTING FREQUENCY into operation .
POWER ON
NORMAL OPERATION
"TUNER CLEAR " is displayd for 1sec.
MEMORY
Click on the first or last page to see other CD-DVD500 (serv.man22) service manuals if exist.