CD-DP2500 (serv.man13). RDS operation - Sharp Audio Service Manual (repair manual)

cd-dp2500 (serv.man13) service manual
Model
CD-DP2500 (serv.man13)
Pages
4 Few pages! See other manuals at the bottom of the first or last page.
Size
43.88 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System / RDS operation
File
cd-dp2500-sm13.pdf
Date

Read Sharp CD-DP2500 (serv.man13) Service Manual online

CD-DP2500H
– 18 –
Yes
Yes
Comparing freg.
same or not?
Between current receiving
frequency and (already)
previously memorized
frequency.
Hold down the ASPM button for 3 more second.
No operate. After displayed “END”. Return to
previous station.
“ASPM” blinks in the display.
Begin to scan start 87.50 
 108.00 MHz
Preset CH memory full over?
SD (TUNE) DET out OK?
Yes
No
No
No
No
No
If count 1st OK?
Yes
If count 2nd OK?
Yes
RDS signal or not?   PI—identify
Yes
Comparing PI cord
same or not?
between current receiving
PI and before PI which is
already memorized by
ASPM on this time.
Yes
Yes
No
Comparing freg.
same or not?
between current receiving
frequency and (already)
previouslymemorized
frequency.
No
Memorized to the lowest vacant
preset channel.
No
Memorized to the lowest vacant
preset channel.
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?
No effect
No effect
No effect
Effect
Pass
No effect
Pass
No effect
Pass
No effect
Pass
No effect
Displayed the TTL quantity of memorized
stations by ASPM operation on this time.
And return to the previous
receiving freq. automatically. 
Begin to ASPM SCAN from the next
CH-SPAN 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.
Preset CH memory become full over?
Yes
No
ASPM, summary operation
TEST MODE
RDS OPERATION
There is no RDS (Radio Data System) broadcasting service in Australia and New Zealand.
KEY
TEST MODE
CONTENTS
[ON/STAND-BY] [TUNER] + [X-BASS]
TEST 1
TUNER PRESET MEMORY CLEAR
[ON/STAND-BY] [MEMORY/SET] + [X-BASS]
TEST 2
TUNER PRESET FOR PRODUCTION
[ON/STAND-BY] [>>] + [X-BASS]
TEST 3
KEY AND DISPLAY TEST
[ON/STAND-BY] [CD] + [X-BASS]
TEST 4
CD TEST MODE
[ON/STAND-BY] [TAPE] + [X-BASS]
TEST 5
TAPE TEST MODE
[ON/STAND-BY] [>] + [X-BASS]
TEST 6
ALL CLEAR(RESET)
[ON/STAND-BY] [TUN UP] + [X-BASS]
TEST 7
AUDIO TEST
[ON/STAND-BY] [TUN DOWN] + [X-BASS]
TEST 8
PRODUCTION INITIALIZE FOR CHANGER
[ON/STAND-BY] [STOP] + [X-BASS]
TEST 10
RDS TEST
During POWER OFF mode,push below each 2 keys [ON/STAND-BY] key.
Then go to each TEST MODE.
– 19 –
CD-DP2500H
4. No adjust type (None adjusting circuit.)
5. Added EON button.
6. Need to change RDS logo due to the addition of EON feature.
7. Added EON—TI, EON—PTY function.
3. Summary of CD-DP2500H RDS—EON operation
EON—PTY: Select and set the desired “PTY” 
→ 
stand-by 
→ 
switch to ON (other network) Station at the start of desired PTY
automatically 
→ 
stay and listen to PTY of ON station 
→ 
switch back to TN (This net) station automatically at the end
of PTY (ON) i.e. after changing to another PTY (except AFFAIRS) or cancelling to receive PTY of ON station
midway.
EON—TI:
Select and set the “TI” 
→ 
stand-by 
→ 
switch to ON station at the start of traffic announcement automatically 
→ 
stay
and listen to TA of ON station 
→ 
switch back to TN station automatically at the end of TA (ON).
ie after TA (ON) is over or cancelled to receive TA of ON station midway.
When switching TN 
→ 
ON station.
In case of exist 2 more stations having the desired (specified) “PTY” or “TI”, the receiver will select and switch to ON station
comparing field strength at the same time. But when the frequency of ON station exists in the preset-memory, then receiver
switches straight to that ON station (CH), without comparing field strength so can make a quick switching from TN—ON station.
Preset memory takes priority of switching TN—ON station.
Therefore ASPM is usefull not only for PTY search but also for rapid EON switching.
Anyway CD-BA1500H EON is basically stand-by and receiving method, along with the Guidelines for EON implementation.
• ASPM SCAN: 87.50MHz 
 108.00 MHz.
• Only RDS signal is memorized by ASPM because RDS signal has PI code and is suitable and convenient for ASPM operation.
  ASPM
  Comparing field strength, only one strongest RDS station is memorized of all stations (repeater relay stations)  that have same
PI code.
Same PI code —  freq: different
        (AF’S)
      PS: same
      PTY:
same
Each PI has AF’S list by individually.
Exa: P1 has f
1
, f
2
, f
3
 (same PTY).
        P2 has f
4
, f
5
 (same PTY).
[For example]
Pickup and memorized to preset CH.
f 1
f 2       f 3
P 1 (PI code)
PS 1 (Station Name)
f 5       f 4
P 2
PS 2
     f 6
f 7       f 8
P 3
PS 3
f9        f 10
f 11  f 12  f13
P 4
PS 4
  Select signals (f1, f5, f7, f10) are memorized in the preset memory by ASPM.
• If tentative - ASPM operation is repeated intentionally, never memorized (over write) at the same frequecy.
1st time ASPM 
→ 
strongest stations of each PI are memorized.
ASPM is not only very usefull for PTY search, but also EON operation.
2nd time ASPM 
 2nd strong stations of each PI are memorized and so on.
PTY search function is equal to FM band search function as a result.
1. Introduction of RDS for CD-DP2500H.
CD-BA2500H RDS function is equal to adding EON feature to the current CD-C75H RDS.
EON feature is EON—PTY and EON—TI.
Although PTY and TI indicators are separated, PTY contains TI in the PTY items (software) like current PTY search items.
       NEWS,
AFFAIRS,           INFO,
ALARM,          TI    (TTL 17 kinds)
        EON—PTY
          EON—TI
Can select and stand-by
          Can select and stand-by
EON—PTY and EON—TI are basically stand-by 
 receive the desired program of ON station.
2. The difference point from current CD-C75H RDS. (CD-C75H — CD-DP2500H)
1. PTY item: added TA. (TTL 18 kind.)
2. Each “TP”, “TA” ind. light up or go out individually.
    “TA” ind. doesn’t light up on current model, CD-C75H due to none EON—TI.
3. Added 3 indicators(in FL) due to adding EON feature.
    EON: Lights up only during receiving EON data (14A).
    TI:
During EON-TI stand-by 
 Light up
During receiving ON station. 
 blink.
    PTY: During EON-PTY stand-by 
 Light up
During receiving ON station. 
 blink.
---
---
CD-DP2500H
– 20 –
EON summary notice for reference
1. EON-TI/PTY
EON stand-by can be set, only when EON ind. lights up.
While EON ind. goes out (NO EON STATION), EON stand-by can't be set.
If the EON button is pressed, then “NO EON” is indication the display.
2. EON-TI/PTY
Even if switch back ON 
→ 
TN station continue to keep EON stand-by.
3. EON-TI
Don’t switch TN 
→ 
ON during TN broadcast TA. (same item)
4. EON-TI/PTY
EON can be cancelled during receiving ON station by pressing EON button if necessary and switch back ON
TN.
5.  EON-TI/PTY
EON stand-by is perfectly cancelled (cleared) by pressing EON button 2 times during stand-by or power OFF
or Tun Up/Down or change band or recall pre-set CH.
6. EON-TI/PTY
After setting EON stand-by, stand-by items can be confirmed by pressing EON button one time.
7. EON-TI/PTY
EON button function: • EON setting
• Confirm stand-by items
• Cancel (ON
TN)
• EON clear cancel (2 times)
8. EON-TI/PTY
After setting EON-TI and EON-PTY stand-by, if when EON data is not transmitted, EON ind goes out  and
EON stand-by is automatically cancelled display “NO EON”.
9. EON-TI
EON-TI stand-by can't be set. When TP=0,TA=0 (TN) even if EON ind. lights up and the EON button is
pressed then “NO TI” is indication the display.
10. EON-PTY
Don’t switch TN 
→ 
ON during TN broadcast same specified PTY. (same item of PTY)
11. EON-TI/PTY
Switch TN
ON 
 TN station one cycle.
Never switch TN 
→ 
ON1 
→ 
ON2 
 Other net to other net station.
12. EON-TI/PTY
After switch TN 
→ 
ON station. When ON station is NO RDS, NO signal, TA=OFF or different PTY items.
The receiver switch back ON 
→ 
TN displaying “NO READY”.
During receive ON station. when ON station become to be NO RDS, NO signal, TA=ON to OFF or different
PTY item, The receiver switch back ON 
→ 
TN.
13. EON-TI/PTY
Switch TN 
→ 
ON in case of 2 more stations exist, comparing field strength and switch to the strongest station,
if these signals are same strength, switch to the first previous station.
If same frequency as AF'Sexists in the preset memory, then switch TN 
→ 
ON (preset memory station) straight.
In case of exist 2 more preset memories of AF’S, then switch to the preset CH which taken in EON DATA
first, also in this case no concern to field strength.
Even if switch TN 
→ 
ON preset memory straight, that ON station is very weak signal, then search another
AF'S (ON) station comparing field strength and switch to the strongest station as a result. Of all atations of
AF'S are very weak or no good condition, then, switch back ON 
→ 
TN automatically display "NO READY".
14. EON-TI/PTY
No linkage volume, power ON/OFF, and switch function.
Traffic Programme code
(TP)
Traffic Announcement code
(TA)
Applications
OFF
OFF
This programme does not carry traffic announcements nor does
it refer, via EON, to a programme that does.
OFF
ON
This programmecarries EON information about another
programme which gives traffic information.
ON
OFF
This programme carries traffic announcements but none are
being broadcast at present and may also carry EON information
about other traffic announcements.
ON
ON
A traffic announcement is being broadcast on this programme
at present.
– 21 –
CD-DP2500H
RDS (Radio Data System) OPERA
TION
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 infor-
mation 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 sta-
tion name if sent) is displayed.
The 
TP
 (T
raf
fic Programme) will appear on the display when
the r eceived broadcast carries traf
fic announcements, and the
T
A
 (T
raf
fic 
Announcement) will appear whilst a traf
fic announce-
ment is being received.
EON will appear whilst the EON (Enhanced Other Networks
information) data is being broadcast.
The PTYI (Dynamic PTY Indicator) will appear whilst the
Dynamic PTY station is being received.
Note:
When the 
TP
 and 
T
A
 appear at the same time, an an-
nouncement is being made.
When only the 
T
A
 appears, an announcement is not being made.
(See page 25.)
Information Provided by RDS
With the CD-DP2500H, you can display three types of RDS
service. 
T
o
 show them in the display
, press the DISPLA
Y
 MODE
button.
Each time you press the DISPLA
Y
 MODE button, the display
will change to show the following information.
Station names commonly known
will be displayed.
“NO PS” appears if no signal is
being received.
Programme type will be dis-
played.
“NO PTY” appears if no signal is
being received.
Radio text will be displayed.
“NO R
T” appears if no signal is
being received.
Station frequencies.
PS (Programme Service):
PTY
 (Programme 
T
ype):
R
T
 (Radio 
T
ext):
Station Frequency:
NEWS:
Short accounts of facts, events and publicly
expressed views, reportage and actuality
.
AFF
AIRS:
T
opical programme expanding or enlarging
upon the news, generally in dif
ferent presen-
tation style or concept, including debate, or
analysis.
INFO:
Programmes whose purpose is to impart ad-
vice in the widest sense.
SPORT
:
Programme concerned with any aspect of
sport.
EDUCA
TE:
Programme intended primarily to educate, of
which the formal element is fundamental.
DRAMA:
All radio plays and serials.
CUL
TURE:
Programmes concerned with any aspect of na-
tional or regional culture, including language,
theatre, etc.
SCIENCE:
Programmes about the natural sciences and
technology
.
V
ARIED:
Used for mainly speech-based programmes
usually of light-entertainment nature, not cov-
ered by other categories. Examples include:
quizzes, panel games, personality interviews.
POP M:
Commercial music, which would generally be
considered to be of current popular appeal,
often featuring in current or recent record sales
charts.
ROCK M:
and performed by young musicians.
EASY M:
Cur rent contemporary music considered to
be “easy-listening”, as opposed to Pop, Rock
or Classical, or one of the specialized music
styles, Jazz, Folk or Country
. Music in this cat-
egory is often but not always, vocal, and usu-
ally of short duration.
LIGHT M:
Classical Musical for general, rather than spe-
cialist appreciation. Examples of music in this
category are instrumental music, and vocal or
choral works.
CLASSICS:
Performances of major orchestral works, sym-
phonies, chamber music etc., and including
Grand Opera.
OTHER M:
Musical styles not fitting into any of the other
categories. Particularly used for specialist mu-
sic of which Rhythm & Blues and Reggae are
examples.
WEA
THER:
W
eather reports and forecasts and Meteoro-
logical information.
FINANCE:
Stock Market reports, commerce, trading etc.
CHILDREN:
For programmes targeted at a young audience,
primarily for entertainment and interest, rather
than where the objective is to educate.
SOCIAL:
Programmes about people and things that in-
fluence them individually or in groups. Includes:
sociology
, history
, geography
, psychology and
society
.
RELIGION:
Any aspect of beliefs and faiths, involving a God
or Gods, the nature of existence and ethics.
PHONE IN:
Involving members of the public expressing their
views either by phone or at a public forum.
TRA
VEL:
Features and programmes concerned with
travel to near and far destinations, package
tours and travel ideas and opportunities. Not
for use for 
Announcements about problems,
delays, or roadworks af
fecting immediate travel
where 
TP/T
A
 should be used.
LEISURE:
Programmes concerned with recreational ac-
tivities in which the listener might participate.
Examples include, Gardening, Fishing. 
Antique
collecting, Cooking, Food & Wine etc.
JAZZ:
Polyphonic, syncopated music characterised
by improvisation.
COUNTR
Y
:
Songs which originate from, or continue the
musical tradition of the 
American Southern
States. Characterised by a straightforward
melody and narrative story line.
NA
TION M:
Current Popular Music of the Nation or Region
in that country’
s language, as opposed to In-
ternational ‘Pop’ which is usually US or UK in-
spired and in English.
OLDIES:
Music from the so-called “golden age” of popu-
lar music.
FOLK M:
Music which has its roots in the musical cul-
ture of a particular nation, usually played on
acoustic instruments. 
The narrative or story
may be based on historical events or people.
DOCUMENT
:
Programme concerned with factual matters,
presented in an investigative style.
TEST
:
Broadcast when testing emergency broadcast
equipment or receivers.
ALARM !:
Emergency announcement made under excep-
tional circumstances to give warning of events
causing danger of a general nature.
NONE:
No programme type (receive only).
TP:
Broadcasts which carry traf
fic announcements.
TA
:
T
raf
fic announcements are being broadcast at
present.
(Continued)
Descriptions of the PTY
 (Programme 
T
ype) codes, 
TP
 (T
raf
fic Programme) and 
T
A
 (T
raf
fic 
Announcement)
With the CD-DP2500H, you can search for and receive the following PTY
TP
 and 
T
A
 signals.
Note:
When the unit is in the EON stand-by mode and a programme
is selected, the unit will display “TI” instead of “T
A”.
Page of 4
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