DOWNLOAD Sharp CD-C440H (serv.man2) Service Manual ↓ Size: 2.77 MB | Pages: 72 in PDF or view online for FREE

Model
CD-C440H (serv.man2)
Pages
72
Size
2.77 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
cd-c440h-sm2.pdf
Date

Sharp CD-C440H (serv.man2) Service Manual ▷ View online

CD-C440H/CP-C440H
– 10 –
MECHANISM SECTION
• Driving Force Check
Torque Meter
Specified Value
Play: TW-2412
Tape 1: Over 80 g
Tape 2: Over 80 g
• Torque Check
Torque Meter
Tape 2
Play: TW-2111
30 to 60 g. cm
30 to 100 g.cm
Fast forward: TW-2231
50 to 100 g.cm
Rewind: TW-2231
50 to 100 g.cm
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Normal
MTT-111
VRM01
3,000 
±
Speaker
speed
30 Hz
terminal
ADJUSTMENT
Specified Value
Tape 1
• Tape Speed
fL: Low-range frequency
fH: High-renge frequency
•  AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
IF
450 kHz
1,620 kHz
T351
*1
MW Band
522 kHz
(fL): T306
*2
Coverage
1.1 
±
 0.1 V
MW
990 kHz
990 kHz
(fL): T302
*1
Tracking
LW Band
153 kHz
(fL): T305
*2
Coverage
1.5 
±
 0.1 V
LW
225 kHz
225 kHz
(fL): T301
*1
Tracking
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
•  FM
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.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually
Adjusting
Parts
Instrument
Connection
Frequency
Display
Frequency
•  FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
98.00 MHz
98.00 MHz
VR351*
Input: Antenna
(25 dB
µ
V)
Output: Speaker
Terminal
Figure 10-1 ADJUSTMENT POINTS
TUNER SECTION
*1. Input: Antenna,
Output: TP302
*2. Input: Antenna,
Output: TP301
VRM1
TAPE
SPEED
TAPE  MECHANISM  PWB
TUNER  PWB
TP301
CNP301
SO301
ANTENNA
TERMINAL
FE301
TP302
T351
T306
T305
T302
T301
VR351
AM  IF
FM  MUTE
LEVEL
MW  BAND
COVERAGE
MW  
TRACKING
LW  
TRACKING
LW  BAND
COVERAGE
– 11 –
CD-C440H/CP-C440H
TEST MODE
2
1
TO
TE
200 ms
1V/diV
IC 1   15
200 ms
1V/diV
IC 1    7
TRACKING/
ERROR
BARANCE
ADJUST
Figure 11-2
Figure 11-3
2
1
10ms
0.50 V
IC1  20   FE
10ms
0.50 V
IC1  7   TE
Enlarged
View
TRACKING
OFF-SET
ADJUST
Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary
to readjust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
• Automatic adjustment item
1. Focus offset (Fig. 11-2)
2. Tracking offset (Fig. 11-3)
3. E/F balance (tracking error balance) (Fig. 11-4)
4. RF level AGC function (HF level: constant)
5. RF level automatic follow-up of the tracking gain
This automatic adjustment is performed each time a disc is changed. Therefore,
 each disc is played back using the optimal settings.
CD SECTION
Figure 11-1
Note:
Only in STOP state it is possible to slide the pickup with the (
) or (
) key.
VOL. --- Last memory
BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF
Canceling method -  POWER OFF
• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <CD> + <POWER>      TEST: CD operation test
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TST mode (Fig. 11-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the (
) or (
) key.
<MEMORY>
LASER ON
<PLAY> key input
Press <STOP> key.
Stop
TOC. IL is performed, and the ordinary PLAY is performed.
If the following key is pressed during PLAY, it is possible
to specify directly any Track No.
<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9
<Disc Number 3> key: Track 15
<MEMORY>
Tracking on the spot.
SERVO OFF PLAY
<MEMORY>
Tracking on the spot.
SERVO ON PLAY
STOP
2
 0.1s
0.50 V
IC1  20   FE
 0.1s
0.50 V
IC1   7   TE
1
 FOCUS
OFF-SET
ADJUST
 TRACKING
OFF-SET
ADJUST
Figure 11-4
IL is not performed.
<STOP>
CD-C440H/CP-C440H
– 12 –
RDS
1.  RDS Function
PI
ASPM
PS
STATION NAME
PTY
PTY SEARCH
PTY(31)
EON TI (TA)
STAND-BY MODE
EON-PTY
EON-TI/PTY
EON-AF
With EON-AF
TP
ind.
TA
ind.
2.  DISPLAY and control buttons
Select and search (18 kind items) by cyclic
NEWS-AFFAIRS  ------  OTHER M - ALARM - TP - TA
Select and stand-by (17 kind items) by cyclic
NEWS-AFFAIRS  ------  OTHER M - ALARM - TI
RDS
EON
TA TP
PTY TI
DISPLAY
8 character can display E1 table of EBU.
Same as CD-C75H.
Lights up when RDS with EON station is received.
Lights up when RDS station is received.
Lights up when TA station is received.
Lights up when TP station is received.
Lights up when stand-by mode and blinks during staying other network
station.
ASPM
DISPLAY PTY•TI
SEARCH
SET
PTY•TI
SELECT
EON
PTY and TI  items can be
selected when use PTY search
or EON STAND-BY
Can use for
• EON setting
• confirm stand-by item
• cancel (ON
TN)
• EON clear cancel
18 kind
(contain TP, TA)
17 kind
(contain TI)
Note:
TP and TA ind. are different from CD-C75H.
TP, TA ind. can light up individually, when TP: OFF and TA: ON, it means that EON-TI can be used, in case of TP=OFF,
TA=OFF, EON-Ti can't be used.
In case of CD-C75H, (TP: OFF and TA: ON) disregard (ignore) this case, because EON-TI is nothing.
AF: Alternative Frequencycies
– 13 –
CD-C440H/CP-C440H
No
ASPM, summary operation
Hold down the 
ASPM button for 3 more second.
“ASPM” blinks in the display
.
Preset CH memory full over?
No operate. 
After displayed “END”. Return to
previous station.
SD (TUNE) DET out OK?
If count 1st OK?
If count 2nd OK?
RDS signal or not?   PI—identify
Comparing PI cord same or not?
between current receiving PI and
before PI which is already memorized
by 
ASPM on this time.
Comparing freg. same or not?
between current receiving frequency
and (already) previously memorized
frequency
.
Memorized to the lowest
vacant preset channel.
Preset CH memory become full over?
Begin to 
ASPM SCAN from the next
CH-SP
AN again.
Repeat and continue with same format
ASPM operation untill 108 MHz.
After reached 108 MHz, displayed the
TTL quantity of memorized stations.
And return to the previous receiving
freq. automatically
.
Displayed the 
TTL
 quantity of memo-
rized stations by 
ASPM operation on
this time. 
And return to the previous
receiving freq. automatically
.
Ye
s
No
Ye
s
Ye
s
Ye
s
Ye
s
No
No
No
No
No
No
Ef
fect
Pass
No ef
fect
Pass
No ef
fect
Pass
No ef
fect
Pass
No ef
fect
Ye
s
No
Ye
s
Compare the field strength of current
receiving signal. Is receiving signal
stronger than signal which has same PI
cord and is already memorized to
preset memory ahead of this receiving
time?
Ye
s
No ef
fect
No
No ef
fect
Comparing freg. same or not?
Between current receiving frequency
and (already) previously memorized
frequency
.
Ye
s
Memorized to the lowest
vacant preset channel.
Ye
s
No ef
fect
Begin to scan start 87.50 
→ 
108.00 MHz
Page of 72
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