Sharp CDC-621-H Service manual

CD-C621H

SERVICE MANUAL

No. S3911CDC621H/

CD-C621H

CD-C621H mini component system consisting of CD-C621H
(Main unit), CP-C621H (Front speaker) and GBOXS0025AWM1
(Surround speaker).

• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.

• Note for users in UK

Recording and playback of any material may require consent
which SHARP is unable to give. Please refer particularly to the
provisions of Copyright Act 1956, the Dramatic and Musical
Prefomers Protection Act 1956, the Preformers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.

CONTENTS

Page

SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2

IMPORTANT SERVICE NOTES (FOR UK ONLY) ............................................................................................................ 2

SPECIFICATIONS ..............................................................................................................................................................3

NAMES OF PARTS ........................................................................................................................................................... 4

OPERATION MANUAL ...................................................................................................................................................... 6

DISASSEMBLY.................................................................................................................................................................. 7

REMOVING AND REINSTALLING THE MAIN PARTS..................................................................................................... 9

ADJUSTMENT ................................................................................................................................................................. 10

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 16

BLOCK DIAGRAM ........................................................................................................................................................... 17

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................20

VOLTAGE ........................................................................................................................................................................ 36

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 37

TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 38

FUNCTION TABLE OF IC................................................................................................................................................ 43

FL DISPLAY......................................................................................................................................................................50

REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING METHOD (FOR UK ONLY)

SHARP CORPORATION

– 1 –

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

CD-C621H

NOTES ON SCHEMATIC DIAGRAM

• Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.

• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolytic capacitor, the expression “capacitance/withstand
voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type

• Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.

REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION

SW1 OPEN/CLOSE ON—OFF
SW2 MECHA UP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW701 POWER ON—OFF
SW702 STATION ON—OFF
SW703 CLOCK ON—OFF
SW704 TIMER/SLEEP ON—OFF
SW705 DISC 1 ON—OFF
SW706 DISC 2 ON—OFF
SW707 DISC 3 ON—OFF
SW708 DISC SKIP ON—OFF
SW709 OPEN/CLOSE ON—OFF
SW710 REV ON—OFF
SW711 REC PAUSE ON—OFF
SW712 MEMORY/SET ON—OFF
SW713 STOP ON—OFF
SW714 TUNER (BAND) ON— OFF
SW715 VIDEO/AUX ON—OFF

• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas­sis with no signal given.

1. In the tuner section,

( ) indicates AM
< > indicates FM stereo

2. In the main section, a tape is being played back.

3. In the deck section, a tape is being played back.

( ) indicates the record state.

4. In the power section, a tape is being played back.

5. In the CD section, the CD is stopped.

• Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.

SW716 TAPE ON—OFF
SW717 CD ON—OFF
SW718 PTY/TI SEARCH ON—OFF
SW719 EON ON—OFF
SW720 ASPM ON—OFF
SW721 DISPLAY MODE ON—OFF
SW722 FF ON—OFF
SW723 TUNING UP ON—OFF
SW724 TUNING DOWN ON—OFF
SW725 PLAY ON—OFF
SW726 VOLUME DOWN ON—OFF
SW727 VOLUME UP ON—OFF
SW728 X-BASS/DEMO ON—OFF
SW729 EQUALIZER ON—OFF
SW730 DIMMER ON—OFF
SWM 3 FOOL PROOF ON—OFF
SWM 4 F.A.S. ON—OFF
SWM 5 CAM ON—OFF

E C B
(S) (G) (D)
(1) (2) (3)

2SA1015 GR
2SC380 O
KRC102 M
KRC104 M
KRC107 M
KTA1266 GR

Figure 16 TYPES OF TRANSISTOR AND LED

FRONT

VIEW

KTA1271 Y
KTA1273 Y
KTD2058 Y
KTC3199 GR
KTC3203 Y

FRONT VIEW

L1154GT4
SLI342YCB
SLI342DCB
SLI342UCB
SLI342YCJ

– 16 –

CD-C621H

ADJUSTMENT

MECHANISM SECTION

• Driving Force Check

Torque Meter Specified Value

Play: TW-2412 Tape 1: Over 80 g

• Torque Check

Torque Meter

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

• Tape Speed

Test Tape Adjusting

Normal MTT-111 VRM1 3,000 ± Speaker
speed 30 Hz terminal

Tape 2: Over 80 g

Specified Value

Tape 1 Tape 2

Specified

Point

Value

Instrument

Connection

TAPE MECHANISM PWB

VRM1

SWM1

TAPE

FAS
SW

SPEED

TUNER SECTION

fL: Low-range frequency
fH: High-renge frequency

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage Frequency Frequency

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

*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301

• 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

• FM Mute Level

Signal generator: 1 kHz, 40 kHz dev., FM modulated

Frequency

98.00 MHz 98.00 MHz VR351 Input: Antenna
(25 dBµV) Output: Speaker

Frequency

Display

Display

Adjusting

Parts

Setting/

Adjusting

Parts

Connection

Terminal

Instrument

Connection

Instrument

TP302

R357

CNP303

T351

AM IF

L354

TUNER PWB

TP301

R336

VR351

FM MUTE
LEVEL

T306

MW BAND
COVERAGE

Figure 10 ADJUSTMENT POINTS

FE301

T302

L341

MW
TRACKING

SO301
FM ANTENNA
TERMINAL

CNP301
MW LOOP
ANTENNA
TERMINAL

– 10 –

TEST MODE

1 2 3

2

1

10ms

0.50 V
IC1 20 FE

10ms

0.50 V
IC1 7 TE

Enlarged
View

TRACKING
OFF-SET
ADJUST

• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <DISC. SKIP> + <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 (

<MEMORY>
LASER ON

<MEMORY>
Tracking on the spot.
SERVO OFF PLAY

) or ( ) key.

<MEMORY>
Tracking on the spot.
SERVO ON PLAY

IL is not performed.

CD-C621H

<STOP>

STOP

<PLAY> key input

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

Press <STOP> key.

Stop

<Disc Number 3> key: Track 15

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

Figure 11-1

CD SECTION

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.

0.1s

0.50 V
IC1 20 FE

FOCUS
OFF-SET
ADJUST

0.1s

0.50 V
IC1 7 TE

TRACKING
OFF-SET
ADJUST

1
2

Figure 11-2

200 ms
1V/diV
IC 1 15

200 ms
1V/diV
IC 1 7

TO

TE

TRACKING/
ERROR
BARANCE

1

ADJUST

2

Figure 11-4

– 11 –

Figure 11-3

CD-C621H

Yes

Displayed the TTL quantity of memo-

rized stations by ASPM operation on

this time. And return to the previous

receiving freq. automatically.

Preset CH memory become full over?

No

Begin to ASPM SCAN from the next

CH-SPAN again.

No effect

Pass

No effect

Pass

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.

Effect

Memorized to the lowest

vacant preset channel.

No effect

Pass

No effect

Pass

No

No effectNoNo effect

No effect

Memorized to the lowest

vacant preset channel.

No

Yes

No operate. After displayed “END”. Return to

previous station.

Yes

No

Hold down the ASPM button for 3 more second.

ASPM, summary operation

“ASPM” blinks in the display.

Preset CH memory full over?

Begin to scan start 87.50 → 108.00 MHz

No

SD (TUNE) DET out OK?

No

Yes

If count 1st OK?

No

Yes

If count 2nd OK?

Comparing freg. same or not?

between current receiving frequency

and (already) previously memorized

frequency.

No

Yes

RDS signal or not? PI—identify

No

Yes

Comparing PI cord same or not?

between current receiving PI and

before PI which is already memorized

by ASPM on this time.

Yes

Comparing freg. same or not?

Between current receiving frequency

and (already) previously memorized

frequency.

Yes

Yes

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?

– 12 –

CD-C621H

• 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.

Each PI has AF’S list by individually.

Same PI code — freq: different

(AF’S)
PS: same
PTY: same

[For example] Pickup and memorized to preset CH.

f 1
f 2 f 3

P 1 (PI cord)
PS 1 (Station Name)

Select signals (f1, f5, f7, f10) are memorized in the preset memory by ASPM.

• If tentative - ASPM operation is repeated intententionally, 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.

f 5 f 4

P 2
PS 2

Exa: P1 has f1, f2, f3 (same PTY).
P2 has f4, f5 (same PTY).

---

f 6
f 7 f 8

P 3
PS 3

---

f 9 f 10
f 11 f 12 f13

P 4
PS 4

1. Introduction of RDS for CD-C621H

CD-C621H 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-C621H)

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 stanb-by → Light up

During receiving ON station. → blink.

4. No adjust type (None adjusting circuit.)

5. Added EON button.

6. Need to change RDS logo due to add EON feature.

7. Added EON—TI, EON—PTY function.

3. Summary of CD-C621H 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 AF M FAIRS) 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 automati cally → stay

and listen to TA of ON station → switch back to TN station autmatically 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 reciver
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-C621H EON is basically stand-by and receiving method, along with the Guidelines for EON implementation.

↑

– 13 –

CD-C621H

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

5. EON-TI/PTY EON stand-by is perfectly cancelled (cleared) by pressing EON button 2 times during stand-by or power OFF

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

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

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

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.

12. EON-TI/PTY After switch TN → ON station. When ON station is NO RDS, NO signal, TA=OFF or different PTY items.

13. During receive ON station. when ON station become to be NO RDS, NO signal, TA=ON to OFF or different

14. EON-TI/PTY Switch TN → ON in case of 2 more stations exist, comparing field strength and switch to the strongest station,

15. Even if switch TN → ON preset memory straight, that ON station is very weak signal, then search another

16. EON-TI/PTY No linkage volume, power ON/OFF, and switch function.

EON can be cancelled during receiving ON station by pressing EON button if necessary and switch back ON→TN.
or Tun Up/Down or change band or recall pre-set CH.

• Confirm stand-by items

• Cancel (ON→TN)

• EON clear cancel (2 times)
EON stand-by is automatically cancelled display “NO EON”.
pressed then “NO TI” is indication the display.

Never switch TN → ON1 → ON2 → Other net to other net station.
The receiver switch back ON → TN displaying “NO READY”.
PTY item, The receiver switch back ON → TN.
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.

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".

Traffic Programme code

(TP)

OFF OFF This programme does not carry traffic announcements nor does

OFF ON This programmecarries EON information about another

ON OFF This programme carries traffic announcements but none are

ON ON A traffic announcement is being broadcast on this programme

Traffic Announcement code

(TA)

CD ERROR CODE DESCRIPTION

When mulfunction occur during CD operation, error code will
be display to identify the function in CD operation which failed.

Error State Code
0001 Cannot detect puin SW
0101 Tray close operation error
0105 Tray close operation error
0201 Tray open operation error
0203 Tray open operation error
0304 Disc skip operation error
0305 Disc skip operation error

0307 Disc skip operation error

Applications

it refer, via EON, to a programme that does.

programme which gives traffic information.

being broadcast at present and may also carry EON information
about other traffic announcements.

at present.

– 14 –

CD-C621H

RDS (Radio Data System) OPERATION

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 announcements, and the

TA (Traffic Announcement) will appear whilst a traffic announcement 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 TA appear at the same time, an announcement is being made.

When only the TA appears, an announcement is not being made.

Information Provided by RDS

With the CD-C621H, you can display three 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 displayed.

"NO PS" appears if no signal

is being received.

PTY (Programme Type): Programme type will be dis-

played.

"NO PTY" appears if no sig-

nal is being received.

RT (Radio Text): Radio text will be displayed.

"NO RT" appears if no signal

is being received.

Station Frequency: Station frequencies.

DISPLAY

MODE

(Continued)

Descriptions of the PTY (Programme Type) codes, TP (Traffic Programme) and TA (Traffic Announcement)

With the CD-C621H, you can search for and receive the following PTY, TP and TA signals.

NEWS:

Short accounts of facts, events and

publicly expressed views, reportage

and actuality.

AFFAIRS:

Topical programme expanding or en-

larging upon the news, generally in dif-

ferent presentation style or concept,

including debate, or analysis.

INFO:

Programmes whose purpose is to im-

part advice in the widest sense.

SPORT:

Programme concerned with any aspect

of sport.

EDUCATE:

Programme intended primarily to edu-

cate, of which the formal element is

fundamental.

DRAMA:

All radio plays and serials.

CULTURE:

Programmes concerned with any as-

pect of national or regional culture, in-

cluding language, theatre, etc.

SCIENCE:

Programmes about the natural scien-

ces and technology.

VARIED:

Used for mainly speech-based pro-

grammes usually of light-entertainment

nature, not covered by other ca-

tegories. Examples include: quizzes.

panel games, personality interviews.

POP M:

Commercial music, which would gener-

ally be considered to be of current

popular appeal, often featuring in cur-

rent or recent record sales charts.

ROCK M:

Contemporary modern music, usually

written and performed by young musi-

cians.

EASY M:

Current contemporary music con-

sidered to be "easy-listening", as op-

posed to Pop, Rock or Classical, or one

of the specialized music styles, Jazz,

Folk or Country. Music in this category

is often but not always, vocal, and

usually of short duration.

LIGHT M:

Classical Musical for general, rather

than specialist appreciation. Examples

of music in this category are instrumen-

tal music, and vocal or choral works.

CLASSICS:

Performances of major orchestral

works, symphonies, chamber music

etc., and including Grand Opera.

OTHER M:

Musical styles not fitting into any of the

other categories. Particularly used for

specialist music of which Rhythm &

Blues and Reggae are examples.

WEATHER:

Weather reports and forecasts and Me-

teorological 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.

TRAVEL:

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 affecting immediate travel where

TP/TA should be used.

LEISURE:

Programmes concerned with recreational acti-

vities in which the listener might participate.

Examples include, Gardening, Fishing. Antique

collecting, Cooking, Food & Wine etc.

JAZZ:

Polyphonic, syncopated music characterised by

improvisation.

COUNTRY:

Songs which originate from, or continue the mu-

sical tradition of the American Southern States.

Characterised by a straightforward melody and

narrative story line.

NATION M:

Current Popular Music of the Nation or Region

in that country's language, as opposed to Inter-

national `Pop' which is usually US or UK inspired

and in English.

OLDIES:

Music from the so-called "golden age" of popular

music.

FOLK M:

Music which has its roots in the musical culture

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 traffic announcements.

TA:

Traffic announcements are being broadcast at

present.

Note:

When the unit is in the EON stand-by mode and a programme

is selected, the unit will display "TI" instead of "TA".

– 15 –

27

1

2

3

4

1

8

6

7

18

244020

4

5

15

23

16

26

27

7
2

2520

29

35

14

21 22

38

39

28

41

42

37

36

PU-IN SW

XL1

XIN

LD0

FIN2

JP–

CV+

SLC

SL1

FIN1EF

TO

FD

SPO

NC

SLD

SL–

SL+

DRF

CL

DAT

CE

VCC1

6

+5V

PICKUP IN

SW4

FOCUS COIL

TRACKING COIL

M1

SPINDLE

MOTOR

M

M

M2

SLED

MOTOR

PICKUP UNIT

9

2

4

8

IC2

LC78622NE

SERVO/SIGNAL

CONTROL

+B1

IC3

M63001FP

FOCUS/

TRACKING/

SPIN/SLED

DRIVER

IC1

LA9241M

SERVO AMP.

RES. CQCK. COIN

SQOUT. RWC. WRQ

~

~

~

CL, DAT, SELIAL CONTROL/CE

Q51

SL+. SL–. DRF

9

8

7

6

5

4

3

2

1

GND (D)

MECHA UP

GND (D)

DISK NO.

OPEN/CLOSE

GND (D)M–M+

GND (M)

9

8

7

6

5

4

3

2

1

CNP10

M

+5V

+B1

62

64 45 3623 43

37

383940

333839

46

24

25

10

1

2

3

4

5

6

10

265853

~

6462

51

10

12

11

22

20

324043

44

5352515431302923271615

4144

Q1

Q52

+4.3V

Q81 +7.3V (B1)

REGULATOR

TO MAIN SECTION

(TO IC601)

XOUT

EFMO

EFMIN

CLV+

JP–

CONT2

CONT1

LCHO

LVSS

RVSS

RCHO

VVDD

VDD

LVDD

RVDD

XVDD

SW1

OPEN/CLOSE

SW2

MECHA UP

SW3

DISC No.

M3

LOADING

SOLM1

TO MAIN

SECTION

CNS10

+B5

~~

CNP11

11

CD-C621H

Figure 17 BLOCK DIAGRAM (1/3)

– 17 –

CD-C621H

2

SO301
ANTENNA
TERMINAL

AM LOOP ANT

L341

BALUN

T302

FE301

FM FRONT END

2867 3 4

AM RF

AM ANT

FM

OSC

T306

VT

AM OSC

FM IF

AMP

FM IF

1

CF301

Q301

5

FM MUTE LEVEL

FMOSC

+B4

FM +B

Q360

FM

VOLTAGE
REGULATOR

23 222120 15 14

DI

CL

CE

DO

ICT21
LC72720

IN

RDS DECORDER

MPX

VSSA

VDDA

3

2

4

VR351

+B4

FM IF

CF302

FM IF IN

7

AM IF

T351

12 3 4589

REG INOUT VCC

FM/AM IF MPX.

AM OSC

23

22

24

IN

AFC

OUT

X352

4.5MHz

2220

15

1

OSC

IC302

LC72131

PLL (TUNER)

VSSD

IC303

LA1832

21

STEREO

AM RF IN

INAM

FM IN

1116

4

3 6

DI

CE

13

XIN

VDDD

XOUT

12

FM IF

CF351

GND

13

67
SD

MONO/ST

FM MONO/ST

10

5

CL

DO

Q371

XT21

+B4

17 19

IF

OUT

10

PHASE

VOLTAGE
REGURATER

+B4

IF IN

1213

21

4.332MHz

X351

Q361
MPX

17

456kHz

11

+5V

20

12

SM

18 16

FM/AM

OUT

MPX
VCO
CUT

MPX

IN

14

15

RL

MUTING

TUNER MUTE

AMP.

QT21

Q353
Q354

3
5

3

8

IC563

KIA4558P

OPE AMP.

IC562

KIA4558P

OPE AMP.

8

SWM3

FOOL PROOF

SWM4
F.A.S

SOLM1

SOLENOID

SWM5

CAM

–B1+B5

4

1

6 7

1

4

–B1+B5

+B7

FM/AM
SWITCHING

1

KIA7042AP

RESET

IC704

2

3

FROM CD SECTION
CNP11

TAPE 1

PB HEAD

TAPE 2

REC PB HEAD

L-CH
R-CH

L-CH

R-CH

ERASE
HEAD

REC

P.B

AC BIAS

CNS11

1
2
3

SWITCHING

Q103~Q106

AN7345K

PLAYBACK AND RECORD

/PLAYBACK AMP.

L(T1)

1

24

R(T1)

L(T2)

2

23

R(T2)

L NF

3
4

R NF

T1/T2

L REC

R REC

REF

6
9

16
14
12

REC

NOR/
HIGH

15 19

POP REDUCE

SWITCHING SWITCHING

Q107
Q108

Q109

SWITCHING

BIAS
OCS

Q128
L104

IC101

Q111

P.B.

H/N

T1/T2

13

4

21

5

20

7

18

8

17
10

Q110

L
R

L R REC

L NF
R NF

ALC

+B4

PB

JK601

VIDEO/AUX

L
R

SWITCHING

Q124
L103

AUX
TAPE
TUNER

CD

11

M62439SP

1

20

10

IC601

9

5

L

16

R

4

L

17

R

3

L
R

18

AUDIO PROCESSOR

L

2

R

19

BAIS

Q126

Q121
Q122

MUTING

+B4

R

13

8

L

REC

T1/T

BAI

Figure 18 BLOCK DIAGRAM (2/3)

– 18 –

SWM3

FOOL PROOF

SWM4

F.A.S

SOLM1

SOLENOID

SWM5

CAM

M

MM1

TAPE MOTOR

Q702
Q703

~~~

15 2516

1 2 3

4

FL701

DISPLAY

26

CD-C621H

~

28

36

37 3839

29

Q705
Q706
Q707

FM/AM
SWITCHING

+B7

KIA7042AP

RESET

10

601

439SP

ROCESSOR

9

Q121
Q122

MUTING

535251

50
49
48
47

+B7

46

VDD

45
44
43
42
41
40
39

+B7

+B7

3

KEY
SW701
~SW730

Q603
Q604

+B1

+B4

+B5

+B2

38
37
36
35
34

AVDD

33
32
31

282930

PHM1

–B1

+7.3V

+12V(ANALOG)

+12V(MOTOR)

+5.6V

Q821

+B5

–15V

VOLTAGE

REGULATOR

IC704

3

1

2

1

RX701

2

+B4

R

13

8

L

Q601
Q602

REC

ZD801

T1/T2

IC701

IX0281AW

SYSTEM CONTROL

MICROCOMPUTER

VDD

+B7

IC901

14

STK40704

10

POWER AMP.

–B

2

1

Q822

F832

T500mA L 250V

VOLTAGE

REGULATOR

Q824

VOLTAGE

REGULATOR

Q823

VOLTAGE

REGULATOR

Q801

+B

3

XL701

4.19MHz

15

D803~D806

D807
~D809

7170696867666564636261 80797877

737260595857565554

101112131415161718192021222324252627

8

9

7

Q704

FRONT

L-OUT

6

R-OUT

7

D801

767574

4 3 2 1

6

5

+B5

Q908

F802

T4A L 250V

F803

T4A L 250V

F805

T2A L 250V

81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99

100

VDD

TO CD
SECTION

Q960

T801

POWER

TRONSFORMER

T.F

RL901

MEMORY
BACK UP

UNSWITCH
+B7

+B5

M901

M

FAN MOTOR

JK970
HEADPHONES

SO901
SPEAKER
TERMINAL

SURROUND
SPEAKER

FRONT
SPEAKER

RL801

L801

AC POWER
SUPPLY CORD

AC 230V 50Hz

BAIS

+5V

+B6

Q802

UNSWITCH

+B7

Q803

Figure 19 BLOCK DIAGRAM (3/3)

– 19 –

D810~D813

T802

POWER

TRONSFORMER

AUD991004

Month of Issue: October 1999

Classification: White

AUDIO TECHNICAL BULLETIN Page 1 of 1

MODELS CDC621H CDPC651H CDPC671H

REASON There is a printing error in the service manual parts listing for the Motor with Chassis

(M1) and Rail, Guide (item 303).

ACTION Please amend the service manual with the part numbers given below.

REF NO DESCRIPTION PART NUMBER PRICE CODE

303 Rail, guide MLEVP0080AWZZ AC
M1 Motor with chassis 92LMTR2790CASY BB

Sharp Electronics (UK) Limited

Reference EAA-953

Revision 1

White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units

CD-C621H

Screw Driver

Woofer

(A3)x4
ø4x12mm

(A3)x2
ø3x10mm

(A2)x2

Front Panel

(A1)x1

Tweeter

(A1) x2
ø2.6 x5mm

Loading/Up/
Down Motor

Motor
PWB

CP-C621H

STEP REMOVAL

1 Front Speaker 1. Front Panel ............ (A1) x1 9-1

Note:

The rear speakers can be easily disassembled.
Therefore the disassembling method is not discribed.
For details refer to the disassembling drawing in the Parts
Guide.

PROCEDURE

2. Tip .......................... (A2) x2

3. Screw ..................... (A3) x6

FIGURE

REMOVING AND REINSTALLING THE MAIN PARTS

CP-C621H

Figure 9-1

CD MECHANISM SECTION

Perform steps 1, 2, 3, 11, 12, 13, 14 and 15 of the disassembly
method to remove the CD mechanism.

How to remove the loading motor
(See Fig. 9-2)

1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.

How to remove the pickup (See Fig. 9-3)

1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2).

2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).

3. Remove the pickup.

Note

After removing the connector for the optical pickup fromthe
connector wrap the conductive aluminium foil around the front
end of connector so as to protect the optical pickup from
electrostatic damage.

(B1) x2
ø2.6 x6mm

Figure 9-2

Stop Washer
(B3) x1

Pickup

– 9 –

Shaft
(B2) x1

CD Mechanism
Gear
(B4) x1

Figure 9-3

DISASSEMBLY

Caution on Disassembly

Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:

1. Take cassette tape and compact disc out of the unit.

2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.

3. Take off nylon bands or wire holders where they need be
removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.

4. Take suffcient care on static electricity of integrated
circuits and other circuits when servicing.

CD-C621H

STEP REMOVAL

1 Top Cabinet 1. Screw ..................... (A1) x4 7-1

2 Side Panel 1. Screw ..................... (B1) x6 7-1

(Left/right) 2. Hook....................... (B2) x2

3 CD Player Unit/ 1. Turn on the power supply, 7-2

CD Tray Cover open the disc tray, take out

4 Back Board 1. Screw ..................... (D1) x5 7-2

5 Tuner PWB 1. Screw ..................... (E1) x3 8-1

6 Main PWB 1. Screw ..................... (F1) x4 8-1

7 Front Panel 1. Screw ..................... (G1) x1 8-1

8

Headphones PWB

9 Display PWB/ 1. Screw .....................

Switch PWB 2. Hook....................... (J2) x2

10 Tape Mechanism 1. Open the cassette holder. 8-2

11 Turntable 1. Screw ..................... (L1) x1 8-3

12 Disc Tray 1. Screw ..................... (M1) x2 8-3

13 CD Servo PWB 1. Screw ..................... (N1) x1 8-4

(Note 2) 2. Socket .................... (N2) x4

14 CD Changer 1. Screw ..................... (P1) x4 8-5

Mechanism

15 CD Mechanism 1. Screw ..................... (Q1) x1 8-5

Note 1:

How to open the changer manually. (Fig. 7-3)

1. Change, turn fully the lock lever in the arrow direction
through the hole on the loading chassis bottom in this state.
After that, push forward the CD player base.

Note 2:

1. After removing the connector for the optical pickup fromthe

connector wrap the conductive aluminium foil around the
front end of connector so as to protect the optical pickup
from electrostatic damage.

PROCEDURE

the CD cover, and close.
(Note 1)

2. Hook....................... (C1) x3

3. Hook....................... (C2) x2

4. Socket .................... (C3) x2

2. Socket .................... (E2) x1

2. Socket .................... (F2) x4

3. Flat Wire................. (F3) x1

4. Tip Wire.................. (F4) x1

5. Flat Cable .............. (F5) x1

2. Socket .................... (G2) x1

3. Hook....................... (G3) x2

1. Screw ..................... (H1) x1 8-2

2. Support Bracket ..... (H2) x1

(J1) x12

3.Socket ..................... (J3) x1

2. Screw...................... (K1) x5

2. Cover ..................... (L2) x1

2. Guide ..................... (M2) x2

FIGURE

8-2

CD-C621H

(B2)x1

(B1)x1
ø3x8mm

Side Panel
(Right)

CD Player
Unit

Back Board

(A1)x2
ø3x12mm

Back Board

(C3) x2

(B1)x4
ø3x8mm

(C2) x1

Pull

LOCK
LEVER

CD-C621H

Top Cabinet

(A1)x2
ø3x12mm

Side Panel
(Left)

(B2)x1

(B1)x1
ø3x8mm

Figure 7-1

CD Tray Cover

( C1) x3

1

1

2

( C2 ) x1

Main PWB

(D1)x5
ø3x8mm

Figure 7-2

Figure 7-3

– 7 –

CD-C621H

(P1) x4

ø3 x12mm
(Q1) x1
ø2.6 x10mm

CD Changer
Mechanism

CD Mechanism

Shift Lever

CD Player Base

(F2)x2

(E1)x2
ø3x10mm

(F1)x1
ø3x10mm

(N1) x1
ø3 x10mm

(F5)x1

(F2)x2

(G2)x1

(F4)x1

(F3)x1

(G3)x1

Tuner PWB

Switch PWB

Main PWB

Figure 8-1

(J2)x2

(G1)x1
ø3x8mm

(J3)x1

Front Panel

Front Panel

(E2)x1

(G3)x1

(F1)x3
ø3x10mm

(E1)x1
ø3x10mm

CD Servo PWB

(N2) x2

(N2) x2

CD Player Unit

Figure 8-4

(J1)x2
ø3x10mm

(J1)x7
ø3x10mm

(J1)x3
ø3x10mm

(H2)x1

(H1)x1
ø3x10mm

(L2) x1

(M1) x1
ø3 x10mm

(K1)x5
ø3x10mm

Figure 8-2

(L1) x1
ø3 x10mm

Washer

Display PWB

Headphones
PWB

Open

Cassette
Holder

Tape Mechanism

Turntable

Disc Tray

Care when installing the CD changer mechanism.
Install the CD changer mechanism on the CD player base after
the shift lever has been set in the highest position.

Figure 8-5

(M2) x1

CD Player Unit

(M2) x1

Figure 8-3

(M1) x1
ø3 x10mm

– 8 –

CD-C621H

Screw Driver

Woofer

(A3)x4
ø4x12mm

(A3)x2
ø3x10mm

(A2)x2

Front Panel

(A1)x1

Tweeter

(A1) x2
ø2.6 x5mm

Loading/Up/
Down Motor

Motor
PWB

CP-C621H

STEP REMOVAL

1 Front Speaker 1. Front Panel ............ (A1) x1 9-1

Note:

The rear speakers can be easily disassembled.
Therefore the disassembling method is not discribed.
For details refer to the disassembling drawing in the Parts
Guide.

PROCEDURE

2. Tip .......................... (A2) x2

3. Screw ..................... (A3) x6

FIGURE

REMOVING AND REINSTALLING THE MAIN PARTS

CP-C621H

Figure 9-1

CD MECHANISM SECTION

Perform steps 1, 2, 3, 11, 12, 13, 14 and 15 of the disassembly
method to remove the CD mechanism.

How to remove the loading motor
(See Fig. 9-2)

1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.

How to remove the pickup (See Fig. 9-3)

1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2).

2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).

3. Remove the pickup.

Note

After removing the connector for the optical pickup fromthe
connector wrap the conductive aluminium foil around the front
end of connector so as to protect the optical pickup from
electrostatic damage.

(B1) x2
ø2.6 x6mm

Figure 9-2

Stop Washer
(B3) x1

Pickup

– 9 –

Shaft
(B2) x1

CD Mechanism
Gear
(B4) x1

Figure 9-3

CD-C621H

FL701 VVKBJ685GNK-1: FL Display

11G

S I

B6

B7

B21

B5

B20

B19

B18

B4

B3

B17

B16

B15

B1

B2

1G 2G 3G 4G 5G 6G 7G 8G

B8

B9
B10
B11
B12
B13
B14

[ 10G ]

ANODE CONNECTION

1G

B1

10G

S4

C O

B7

B6

B5

B4

B3

B2

f

g
e

S5

S3

S2

Dp

a

h

j

b

k

m

n

r

c

p

d

B1 B2

9G

S1

B3 B4 B5

B6 B7

[ 1G~8G ]

7G 8G 9G 10G 11G2G~6G
P1
P2
P3
P4
P5
P6
P7
P8
P9

P10
P11
P12
P13

P14
P15
P16

Dp

d
c
n
p

e

m

g

b
k

h

a

Dp

d
c
n
p

r

r

e

m

g

Dp

m

Dp
d
c

n
p

r

e

d
c
n
p

r

e

m

g

g

S1
B1
B2
B3
B4
B5
B6
B7

c o
b
k

j

j

h

f

f

a

b
k

j

h

f

a

b
k

j

h

f

(LOWER)

a

S1
B1
B2
B3
B4
B5
B6
B7
B8

B9
B10
B11
B12
B13
B14
B15

S1
B1
B2
B3
B4
B5
B6
B7

P17
P18
P19
P20
P21
P22

S2
S3
S4
S5

S2
S3
S4
S5

S2
S3
S4
S5

S2
S3
S4
S5

Figure 50 FL DISPLAY

– 50 –

B16
B17
B18
B19
B20
B21

CD-C621H

FUNCTION T ABLE OF IC

IC1 VHiLA9241M/-1: Servo Amp. (LA9241M) (1/2)

Pin No.

1 FIN2 Connection pin for photodiode of pickup.

2 FIN1 Connection pin for photodiode of pickup.
3 E Connection pin for photodiode of pickup. TE signal is generated through subtraction with F pin.
4 F Connection pin for photodiode of pickup.
5 TB Pin for input of DC component of TE signal.
6 TE- Pin to connect gain setting resistor of TE signal to TE signal.
7 TE TE signal output pin.
8 TESI TES (Track error sense) comparator input pin. TE signal is band-passed and input.
9 SCI Input pin for shock detection.
10 TH Pin to set time constant of tracking gain.
11* TA TA amplifier output pin.
12 TD- Pin to compose tracking phase compensation constant between TD and VR pins.
13 TD Pin to set tracking phase compensation.
14 JP Pin to set amplitude of tracking jump signal (kick pulse).
15 TO Tracking control signal output pin.
16 FD Focusing control signal output pin.
17 FD- Pin to compose focusing phase compensation constant between FD and FA pins.
18 FA Pin to compose focusing phase compensation constant between FD-/FA-pins.
19 FA- Pin to compose focusing phase compensation constant between FA and FE pins.
20 FE Output pin of FE signal.
21 FE- Pin to connect gain setting resistor of FE signal across TE pin.
22 AGND GND for analog signal.
23 NC No connect.
24 SPI Spindle amplifier input.
25 SPG Pin to connect gain setting resistor in the 12cm mode of spindle.
26 SP- Pin to connect spindle phase compensation constant together with SPD pin.
27 SPD Spindle control signal output pin.
28 SLEQ Pin to connect thread phase compensation constant.
29 SLD Thread control signal output pin.
30 SL- Input pin of thread feed signal from micro computer.
31 SL+ Input pin of thread feed signal from micro computer.
32 JP- Input pin of tracking jump signal from DSP.
33 JP+ Input pin of tracking jump signal from DSP.
34 TGL Input pin of tracking gain control signal from DSP. TGL = Gain low at "H"
35 TOFF Input pin of tracking off control signal from DSP. TOFF = Off at "H"
36 TES Output pin of TES signal to DSP.
37 HFL (HIGH FREQUENCY LEVEL) is used to judge whether main beam is positioned on the bit or on the mirror.
38 SLOF Thread servo off control input pin.
39 CV- Pin to input CLV error signal from DSP.
40 CV+ Pin to input CLV error signal from DSP.
41 RFSM RF output pin.
42 RFS- Pin to set gain of RF and set 3T compensation constant together with RFSM pin.
43 SLC (SLICE LEVEL CONTROL) is the output pin to control of the level of the data slice with RF waveform DSP.
44 SLI Input pin to control the level of data slice with DSP.
45 DGND GND pin in the digital system.
46 FSC Output pin for focus search smoothening capacitor.
47 TBC (Tracking Balance Control) Pin to set EF balance variable range.
48* NC No connect.
49 DEF Defect detection output pin of disk.
50 CLK Reference clock input pin. 4.23MHz of DSP is input.

Port Name

RF signal is generated through addition with FIN pin, and FE signal is generated through subtraction.

Function

In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.

– 43 –

CD-C621H

IC1 VHiLA9241M/-1:Servo Amp.(LA9241M) (2/2)

Pin No.

Port Name

51 CL Micro computer command clock input pin.
52 DAT Micro computer command data input pin.
53 CE Micro computer command chip enable input pin.
54 DRF (DETECT RF) RF level detection output.
55 FSS (Focus Serch Select) Pin to switch focus search mode. (± search/+ search for reference voltage)
56 VCC2 VCC pin for servo system and digital system.
57 REFI Pin to connect pass control for reference voltage.
58 VR Reference voltage output pin.
59 LF2 Pin to set defect detection time constant of disk.
60 PH1 Pin to connect capacitor for peak hold of RF signal.
61 BH1 Pin to connect capacitor for bottom hold of RF signal.
62 LDD APC circuit output pin.
63 LDS APC circuit output pin.
64 VCC1 RF system VCC pin.

Function

FIN1

TESI

SCI

VCC1

APC

1FIN2

2

I/V

3

E

4

F

5

TB

6

TE-

7

TE

8

9

BAL

TE

RF DET

VCA

VCA

REF

µ-COM

INTER FACE

T.SERVO & T.LOGIC

10

TH

11

TA

12

TD-

13

TD

F.SERVO & F.LOGIC SPINDLE SERVO SLED SERVO

DEFCLKCLDATCEDRFFSSVCC2REFIVRLP2PH1BH1LDDLDS

495051525354555657585961 60626364

SLC

RF AMP

48

NC

47

TBC

46

FSC

45

DGND

44

SLI

43

SLC

42

RFS-

41

RFSM

40

CV+

39

CV-

38

SLOF

37

HFL

36

TES

35

TOFF

34

TGL

33

JP+

14

JP

15

TO

16

FD

17 18 19 20 21 2322 25 26 27 28 29 30 31 32

FD-

FA FA-

FE FE- AGND SP SPI SPG SP- SPD SLEQ SLD SL- SL+ JP-

24

NC

Figure 44 BLOCK DIAGRAM OF IC

– 44 –

CD-C621H

IC2 VHiLC78622N-1: Servo/Signal Control (LC78622NE) (1/2)

Pin
No.

1 DEFI Input Defect detection signal (DFF) input terminal. (When this terminal is not used, connect it to 0V.)
2 TAI Input For PLL Input terminal for test. Pull-down resistor built in. Be sure to connect this terminal to 0V.
3 PDO Output Phase comparison output terminal for external VCO control.
4 VVSS — Grounding terminal for built-in VCO. Be sure to connect this terminal to 0V.
5 ISET Input Resistor connection terminal for adjustment of PDO output current.
6 VVDD — Power terminal for built-in VCO.
7 FR Input For VCO frequency range adjustment.
8 VSS — Digital system grounding terminal. Be sure to connect this terminal to 0V.
9 EFMO Output For slice level control EFM signal output terminal.
10 EFMIN Input EFM signal input terminal.
11 TEST2 Input Input terminal for test. Pull-down resistor built-in. Be sure to connect this terminal to 0V.
12 CLV+ Outout Output for disc motor control. 3-value output is enabled according to command.
13 CLV- Output Output for disc motor control. 3-value output is enabled according to command.
14 V/P Output Rough servo/phase control automatic selection monitor output terminal.

15 HLF Intput Track detection signal input terminal. Schmidt input.
16 TES Input Tracking error signal input terminal. Schmidt input.
17 TOFF Output Tracking OFF output terminal.
18 TGL Output Output terminal for tracking gain selection. "L": Gain raising.
19 JP+ Output Output for track jump control. 3-value output is enabled according to command.
20 JP- Output Output for track jump control. 3-value output is enabled according to command.
21* PCK Output Clock monitor terminal for EFM data play-back. Phase lock: 4.3218 MHz.
22* FSEQ Output Sync signal detection output terminal.

23 VDD — Digital system power terminal.
24 CONT1 Input/Output General-use input/output terminal 1.
25 CONT2 Input/Output General-use input/output terminal 2.
26 CONT3 Input/Output General-use input/output terminal 3.
27 CONT4 Input/Output General-use input/output terminal 4.
28* CONT5 Input/Output General-use input/output terminal 5.
29* EMPH/CONT6 Output Deemphasis monitor terminal. "H": Deemphasis disc play-back. General-use output terminal 6.
30* C2F Output C2 flag output terminal.
31* DOUT Output Digital OUT output terminal. (EIAJ format)
32* TEST3 Input Input terminal for test. Pull-down resistor built-in. Be sure to connect this terminal to 0V.
33 TEST4 Input Input terminal for test. Pull-down resistor built-in. Be sure to connect this terminal to 0V.
34 PCCL Input General-use input/output command recognition terminal. Pull-down resistor built in.

35*
36 LVDD — Power terminal for L channel.
37 LCHO Output L channel output terminal.
38 LVSS — Grounding terminal for L channel. Be sure to connect this terminal to 0V.
39 RVSS — R channel 1-bit DAC Grounding terminal for R channel. Be sure to connect this terminal to 0V.
40 RCHO Output R channel output terminal.
41 RVDD — Power terminal for R channel.
42*
43 XVDD — Power terminal for crystal oscillation.
44 XOUT Output 16.9344 MHz crystal oscillator connection terminal.
45 XIN Input 16.9344 MHz crystal oscillator connection terminal.
46 XVSS — Grounding terminal for crystal oscillation. Be sure to connect this terminal to 0V.

MUTEL/CONT7

MUTER/CONT8

Output L channel 1-bit DAC Mute output terminal for L channel. General-use output terminal 7.

Output Mute output terminal for R channel. General-use output terminal 8.

"H": Rough servo, "L": Phase servo

When the sync signal detected from the EFM signal coincides with the internally generated sync
signal: "H"

When this terminal is used for the same function as that of LC78622E, open or connect this
terminal to 0V.
H: Only the general-use input/output port command is controllable.
L: All command controls are enabled.

In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.

FunctionTerminal Name Input/Output

Control with serial data command from microcomputer.
When this terminal is not used, set it as an input terminal
and connect to 0V or set it as an output terminal and
open.

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