DOWNLOAD Sharp CD-C423H (serv.man13) Service Manual ↓ Size: 98.48 KB | Pages: 6 in PDF or view online for FREE

Model
CD-C423H (serv.man13)
Pages
6
Size
98.48 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System / Adjustments
File
cd-c423h-sm13.pdf
Date

Sharp CD-C423H (serv.man13) Service Manual ▷ View online

CD-C423H
– 10 –
ADJUSTMENT
Figure 10 ADJUSTMENT POINTS
TUNER SECTION
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
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
*1. Input: Antenna,
Output: TP302
*2. Input: Antenna,
Output: TP301
fL: Low-range frequency
fH: High-renge frequency
•  AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
•  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
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 60 g.cm
Fast forward: TW-2231
60 to 120 g.cm
Rewind: TW-2231
60 to 120 g.cm
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Normal
MTT-111
Volume in
3,000 
±
Speaker
speed
motor.
30 Hz
terminal
(MM1)
(Load
resistance:
8 ohms)
Specified Value
Tape 1
 Tape Speed
TAPE MECHANISM
MM 1
Motor
Volume in motor
TUNER  PWB
TP301
CNP301
SO301
ANTENNA
TERMINAL
FE301
TP302
R357
R336
T351
T306
T302
VR351
AM  IF
FM  MUTE
LEVEL
AM  BAND
COVERAGE
AM  
TRACKING
– 11 –
CD-C423H
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>
1
2
3
CD-C423H
– 12 –
DISPLAY
MODE
Note:
   When the unit is in the EON stand-by mode and a pro-
gramme is selected, the unit will display "TI" instead of "TP" or
"TA".
RDS (Radio Data System) OPERATION
    Receiving FM Stations with RDS (Radio Data
    System)
RDS is a broadcasting service which a growing number of FM
stations are now providing. It allows these FM stations to send
additional signals along with their regular programme signals.
For example, the stations send their station names, and
information about what type of programme they broadcast,
such as sports or music, etc.
When tuned to an FM station which provide the RDS service,
the RDS will appear, the station frequency (and then the
station name if sent) is displayed.
The TP (Traffic Programme) will appear on the display when
the received broadcast carries traffic annoucements, and the
TA (Traffic Annoucement) will appear whilst a traffic
announcement is being received. EON will appear whilst the
EON (Enhanced Other Networks information) data is being
broadcast.
Note:
When the TP and TA appear at the same time, an announce-
ment is being made.
When only the TA appears, an announcement is not being
made. (See page 15.)
    Information Provided by RDS
With the CD-C423H, you can display two types of RDS
service. To show them in the display, press the DISPLAY
MODE button.
Each time you press the DISPLAY MODE button, the display
will change to show the following information.
PS (Programme Service):
Station names commonly
known will be diaplayed.
"NO PS" appears if no signal
is being sent.
PTY (Progamme Type):
Programme type will be
diplayed.
"NO PTY" appears if no
signal is being sent.
Station Frequency:
Station frequencies.
Descriptions of the PTY (Programme Type) codes, TP (Traffic
Programme) and TA (Traffic Announcement)
Eith the CD-C421H/C411H, you can search for and receive
the forrowing PTY, TP and TA signals.
NEWS:
News
AFFAIRS:
Topical programme expanding on the
current news or affairs
INFO:
Programmes on medical service, weather
forecast, etc.
EDUCATE:
Educational programmes
DRAMA:
Radio plays
CULTURE:
Programmes on national or regional culture.
SCIENCE:
Programmes on national sciences and
technology.
VARIED:
Other programmes like comedies or
ceremonies
POP M:
Pop music
ROCK M:
Rock music
M.O.R. M:
Middle-of-the-road music (usually called
"easy listening")
LIGHT M:
Light music
CLASSICS:
Classics
OTHER M:
Other music
ALARM:
Emergency broadcasts
NONE:
no Programme type (receive only)
TP:
Broadcasts which carry traffic
announcements
TA:
Traffic announcements are being broadcast
at present.
Figure 12-1
– 13 –
CD-C423H
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 effect
Pass
No effect
Pass
No effect
Pass
No effect
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 effect
No
No effect
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 effect
Begin to scan start 87.50 
→ 
108.00 MHz
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Sharp CD-C423H (serv.man13) Service Manual ▷ Download

  • DOWNLOAD Sharp CD-C423H (serv.man13) Service Manual ↓ Size: 98.48 KB | Pages: 6 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp CD-C423H (serv.man13) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp CD-C423H (serv.man13) System. Information contained in Sharp CD-C423H (serv.man13) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.