Read Sharp CD-E700 (serv.man7) Service Manual online
– 9 –
CD-E700E
REMOVING AND REINSTALLING THE MAIN PARTS
TAPE MECHANISM SECTION
Perform steps 1 to 6 and 8 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. 9-1)
heads (TAPE 2) (See Fig. 9-1)
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. 9-2)
(See Fig. 9-2)
1. When you remove the screws (B1) x 2 pcs., the playback
head can be removed.
How to remove the pinch roller (TAPE 1/2)
(See Fig. 9-3)
(See Fig. 9-3)
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. 9-4)
(See Fig. 9-4)
1. Remove the main belt (D1) x 1 pc., from the tape 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. 9-4)
(See Fig. 9-4)
1. Remove the main belt (E1) x 1 pc., from the tape 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. 9-5)
1. Remove the screws (F1) x 2 pcs., to remove the tape motor.
Figure 9-1
Figure 9-2
Figure 9-3
Figure 9-4
Figure 9-5
(A1)x2
Ø2x6mm
Ø2x6mm
TAPE 2
Record/Playback
Head
Head
Erase Head
Clutch Ass'y
(B1)x2
Ø2x9mm
Ø2x9mm
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
Tape
Motor
Tape
Motor
(F1)x2
Ø2.6x5mm
Ø2.6x5mm
Tape
Motor
Motor
Clutch Ass'y
CD-E700E
– 10 –
How to remove the pickup unit (See Fig. 10-2)
1. Remove the stop washer (B1) x 1 pc., to remove the gear
(B2) x 1 pc.
2. Remove the screws (B3) x 2 pcs., to remove the shaft
(B4) x 1 pc.
3. 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 so as to protect the optical pickup from
electrostatic damage.
After removing the connector for the optical pickup from the
connector wrap the conductive aluminium foil around the front
end of connector so as to protect the optical pickup from
electrostatic damage.
Figure 10-2
CD MECHANISM SECTION
Perform steps 1, 2, 3, 10, 11, 12 and 13 of the disassembly
method to remove the CD mechanism.
method to remove the CD mechanism.
How to remove the loading motor
(See Fig. 10-1)
(See Fig. 10-1)
1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.
Figure 10-1
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 10-3
(B3)x2
ø2.6x6mm
ø2.6x6mm
Shaft
(B4)x1
(B4)x1
Stop Washer
(B1)x1
(B1)x1
Gear
(B2)x1
(B2)x1
CD Mechanism
Pickup
Unit
Unit
TAPE MECHANISM
Tape
Motor
Motor
Variable Resistor in motor
(A1)x5
Loading
Motor PWB
Motor PWB
Loading
Motor
Motor
Loading
Tray
Tray
– 11 –
CD-E700E
Figure 11-2
CD ERROR CODE DESCRIPTION
Error
Explanation
01
When Pickup set inner position, inner switch
cannot detect 'ON' level for 10 secs.
cannot detect 'ON' level for 10 secs.
When tray moves to Open/Close, Open/Close switch
10*
cannot detect 'ON' level for 7 secs.
When disc table rotate to target position.
Clamp switch cannot detect 'ON' level for 7 secs.
When disc table rotate to target position.
Clamp switch cannot detect 'ON' level for 7 secs.
When disc table set to Disc1 position for 1 st time,
11*
"CLAMP SW", "DISC NO SW" and "OPEN/CLOSE"
cannot detect 'ON' level for 14 secs.
cannot detect 'ON' level for 14 secs.
31
When it changes to CD function, DSP cannot read
initial data.
initial data.
T
T
EFBL
FDO
TE
Stopped
CH1=500 mV
DC 10:1
CH2=200 mV
DC 10:1
CH3=1 V
DC 10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
2
3
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.000 V
CH2 : 0.000 V
Main : 100K
Zoom : 2k
Zoom : 2k
Mode : SINGLE
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH2
v/DIV
200 mV
v/DIV
200 mV
1999/04/05 20:26:47
CD SECTION
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
fH: High-range frequency
Items adjusted automatically
(1) Offset adjustment (The offset voltage between the head
amplifier output and the VREF reference voltage is
compensated inside the IC.)
compensated inside the IC.)
* Focus offset adjustment
* Tracking offset adjustment
* Tracking offset adjustment
(2) Tracking balance adjustment (waveform drawing
Fig.11-2 EFBL)
(3) Gain adjustment (The gain is compensated inside the IC
so that the loop gain at the gain crossover frequency will
be 0 dB.)
be 0 dB.)
* Focus gain adjustment
* Tracking gain adjustment
* Tracking gain adjustment
• Adjustment
Since this 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.
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.
* 'CHECKING'
If Error is detected, 'CHECKING' will be display instead of 'ER-
CD**' display. 'ER-CD**' display will only be display when
error had been detected for the 5 th times.
If Error is detected, 'CHECKING' will be display instead of 'ER-
CD**' display. 'ER-CD**' display will only be display when
error had been detected for the 5 th times.
Figure 11-1 ADJUSTMENT POINTS
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
•••••
AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna
Output: TP302
*2. Input: Antenna
Output: TP301
AM IF
450 kHz
1,620 kHz
T351
*1
AM Band
—
522 kHz
(fL): T306
*2
Coverage
1.1
±
0.1 V
AM Tracking 990 kHz
990 kHz
(fL): T303
*1
SO301
FM ANTENNA
TERMINAL
AM IF
TP301
TP302
R357
R381
T303
T306
L354
FE301
T351
CNP302
AM LOOP
ANTENNA
AM BAND
COVERAGE fL
COVERAGE fL
AM TRACKING
fL
fL
MAIN PWB
1
• FM IF
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually.
CD-E700E
– 12 –
TEST MODE
•
Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<X-BASS> + <CD> + <POWER> TEST: CD operation test.
<X-BASS> + <CD> + <POWER> TEST: CD operation test.
Function: -CD test mode.
-Enter test mode.
C D T E S T
OPEN/CLOSE operation is using manual.
<<
>>, <<
>> buttons make pick's slide possible.
Do TOC IL. Do normal play.
When these following key is input
into PLAY key, track number can
be appoint directly.
When these following key is input
into PLAY key, track number can
be appoint directly.
<<PLAY>> key input.
<<MEMORY>> key input.
<<
1 >> key: Track 4
<<
2>> key: Track 9
<<
3>> key: Track 15
<<STOP>> key input.
STOP
Laser ON.
<<MEMORY>> key input.
Tracking OFF play at that
specific point.
specific point.
<<MEMORY>> key input.
Tracking ON play from
that specific point.
that specific point.
<<STOP>> key input.
STOP
IL isn't done
VOL — Last memory
BAL — CENTER
P.GEQ — FLAT
X-BASS — OFF
BAL — CENTER
P.GEQ — FLAT
X-BASS — OFF
To cancel : Power OFF
Sliding the PICKUP with
<<
<<
>>, <<
>> button
must only be in STOP mode.
<<MEMORY>>
key input.
key input.
Adjustment result
automatically will
display as below.
for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"
automatically will
display as below.
for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"
explanation:
a) Focus off set
a) Focus off set
= "FOFF_XX"
b) Tracking off set
= "TOFF_XX"
c) Tracking balance
= "TBAL_XX"
d) Tracking Gain
= "TGAN_XX"
f)
Focus Gain
= "FGAN_XX"
g) RF level shift
= "RFLS_XX"
Adjustment result automatically will
display as below for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"
display as below for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"
<<MEMORY>> key input.
