Sony HTC-D259 User manual

SERVICE MANUAL
HTC-D259 is the compact
disc deck in LBT-A27CDM
/ D259CD.
HTC-D359 is the compact
disc deck in LBT-A37CDM
/D359CD.
SPECIFICATIONS
Cassette deck
Recording system
Frequency response
4-track 2-channel stereo
DOLBY NR OFF
With Type Il cassette (Sony UX-S)
40 Hz to 14 kHz (+3 dB)
With Type I cassette (Sony HF-S)
40 Hz to 13 kHz (+3 dB)
Wow and flutter 0.1% (WRMS)
Compact disc player
Laser Semiconducotr laser
Wavelength 780 — 790 nm
Frequency response 2 Hz to 20 kHz + 0.5 dB
Signal-to-noise ratio More than 93 dB
Dynamic range More than 90 dB
Harmonic distortion Less than 0.008% (1 kHz)
Channel separation More than 90 dB (1 kHz)
General
Mass Approx. 6.9 kg
Dimensions Approx. 355 X 225 xX 385 mm
(w/h/d, including projections)
Speaker systems (SS-D270)
Speaker system 2-way
Mass Approx. 6.3 kg, per speaker
Dimensions Approx. 260 X 505 X 210 mm
(w/h/d)
Design and specifications are subject to change without notice.
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol D0) are trademarks of
Dolby Laboratories Licensing Corporation.
nIG-D
Canadian Model
HTC-D259
AEP Model
UK Model
E Model
Australian Model
HTC-D259/D359
PX Model
HTC-D359
Photo: HTC-D359
HCD-H150/H500
BU-5BD3
HCD-H170
/H170K/H700
DECK A|TCM-190RA12CL
TCM-190RB22CL
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Model Name Using Similar Mechanism
Base Unit Name
Model Name Using Similar Mechanism
Tape Transport Mechanism
Type
CLASS 1 LASER PRODUCT
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
Laser component in this product is capable of emitting
radiation exceeding the limit for Class 1.
The following caution label is located inside the unit.
: INVISIBLE LASER RADIATION WHEN OPEN
CAUTION ; AVOID EXPOSURE TO BEAM.
* USYNLIG LASERSTRALING VED ABNING NAR
ADVARSEL ; SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION .
UNDGA UDS AETTELSE FOR STRALING.
VARO! + AVATTAESSA JA SUOJALUKITUS OHITETTAESSA
; DLET ALTTHNA LASERSATEILYLLE
* LASERSTRALING NAR DENNA DEL AR OPPNAD
PLAD
VARNING
OCH
SPARREN
AR
URXOP
ADVARSEL ; ae ye LASERSTRALING NAR DEKSEL APNES
UNNGA EKSPONERING FOR STRALEN
COMPACT DISC DECK
ONY.

MODEL IDENTIFICATION
Back Panel
Note on the Transit key
LLL LL
4-955-832-01: HTC-D259
4-955-832-11: HTC-D359 The transit key (a)) on the bottom exterior of the CD player protects
the optical system against shock during transportation.
Before operating the unit, be sure to remove the key by following the
instructions on the label, and store it in a safe place.
UP BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may
suffer electrostatic breakdown because of the poten-
tial difference generated by the charged electrostatic
load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-
down and also use the procedure in the printed
matter which is included in the repair parts.
The flexible board is easily damaged and should be
handled with care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so
as to be focused on the disc reflective surface by the
objective lens in the optical pick-up block. There-
fore, when checking the laser diode emission, observe
more than 30 cm away from the objective lens.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
When transporting the unit, put the key to its original position and
lock it in place.
TABLE OF CONTENTS
Section Title Page
Specifications -+++srtte reser steer eter eee ee eeee 1
Notes on Handling the Optical Pick-up Block
or Base Unit eee ere ee ech ee eee ee ee ee te ee 2
Notes on Laser Diode Emission Check -+++++++++++: 2
Note on the Transit Key ee 2
1. GENERAL. 62<s2sisesS oe exdtnd te ues eS
2. ADJUSTMENTS
2-1. Mechanical Adjustments «+++-:++rrrrtreeeees 4
2-2... - Electrical Adjustments: «1+ *} 9s 273439 es 4
Cassette Deck Section: *saassesurisase siete 4
CD Section Ce ee OY 7
3. DIAGRAMS
3-1. CD Section Block Diagram ++++++++rrretrees 9
3-2. | Cassette Deck Section Block Diagram ---::-:> Bi
3-3. CD Section Printed Wiring Boards --+++:+-+:: 14
3-4, CD Section Schematic Diagram -++++++++°+++ 17
3-5. Cassette Deck Section Schematic Diagram ---- 22
3-6. Cassette Deck Section Printed Wiring Boards -- 27
4. EXPLODED VIEWS --ecee tree eer etree 31
5. ELECTRICAL PARTS LIST .::-:::---:::: 38
ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE /\
SUR LES DIAGRAMMES SCHEMATIQUES ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA SECURITE
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIECES SONY DONT LES
NUMEROS SONT DONNES DANS CE MANUEL OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.

This section is extracted from SECTION 1
instruction manual. GENERAL
|Mererz\((e)ameyi
Ore) alice) is)
Cassette Deck
[1] Tape operation buttons
<4 Leftward fast winding/AMS*
PP Rightward fast winding/AMS*
> Forward play
“@ Reverse play
M Stop
& EJECT
BE PAUSE (deck B only)
O REC MUTE (record muting)
(deck B only)
@ REC (record) (deck B only)
[2] Cassette holders
—_ [3] DOLBY NR (noise reduction) switch (32,
=n 82)
=
[4]
DIRECTION
MODE
selector
(28,
32, 38,
=m
EJ
=
5.
en
re) [5] DUBBING SPEED (HIGH/NORMAL)
4
I
button
(38,
40)
16 [6] CD SYNCHRO button (82, 86)
7 (HTC-D359)
o
iE
|
9
|
19
Compact
Disc
Player
20)
[7] DISC 1 - 5 buttons (42, 46, 50, 52, 54)
Disc tray
22) [9] </> I (AMS*) buttons (46, 52, 54,
ag
88,
96)
:
[10] </b> (manual search) buttons (48,
88, 96)
TIME button (44)
FADER button (94)
EDIT/TIME FADE button (88, 94)
[14] CHECK (program check) button (54)
[15] CLEAR (program clear) button (56)
[16] 4 OPEN/CLOSE button (42)
[17] DISC SKIP button (42, 46)
[18] fl (stop) button (42)
Bl (pause) button (42)
[20] B> (play) button (42)
[2] PLAY MODE button
PROGRAM button (52, 86)
SHUFFLE button (50)
CONTINUE button (42)
[22] MUSIC SCAN button (58)
[23] REPEAT button (60)
[24] Display window
* AMS is the abbreviation of Automatic
Music Sensor.
114

bracket
(press pulley)
SECTION 2
ADJUSTMENTS
2-1. MECHANICAL ADJUSTMENTS
Precautions:
1. Clean the following parts with a denatured-alcoholmois-
tened swab;
record/playback/erase head
pinch roller rubber belts
capstan idler
2. Demagnetize the record/playback head with a head demag-
netizer.
(Head demagnetizer do not approach for the erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to
the parts adjusted.
3. The adjustments should be performed in the rated power
supply voltage unless otherwise noted.
Torque Measurement
Torque Torque meter
35 to 60g - cm
(0.49 to 0.83 oz ¢ inch)
2 to 6g°cm
(0.03 to 0.08 oz-inch)
. 35 to 60g °- cm
REV CQ-102RC (0.49 to 0.83 oz « inch)
REV 2 to 6g-cm
CQ-102RC (0.03 to 0.08 oz-inch)
FWD
Back
tension
CQ-102C
.
.
70
to
110g
-em
FF,
REW
CQ-201B
(0.98
to
1.52
02
+
inch)
Chucking
Arm
Height
Adjustment
This Adjustment should be performed after the electrical
adjustment and on replacing adjusting screw, magnet, or
chucking pulley.
Procedure :
1. Set disc (YEDS-18) to the optical pick-up block. (Fig. A)
Z. Adjust the bracket (press pulley) to the center of the
magnet with adjusting screw. (Fig. B)
adjusting screw
(+B3 X 25)
YEDS-18
chucking yoke
magnet chucking pulley
Fig. B
2-2. ELECTRICAL ADJUSTMENTS
0 dB=0.775 V (AF)
Precautions:
CASSETTE DECK SECTION
1. Demagnetize the record “playback head with a head
demagnetizer. (Do not bring the head demagnetizer close
to the erase head.)
Do not use a magnetized screwdriver for the adjustments,
After the adjustments, apply suitable locking compound
to the parts adjusted.
4, The adjustments should be performed with the rated
power supply voltage unless otherwise noted,
5. The adjustments should be performed in the order given
in this service manual, (As a general rule, playback
circuit adjustment should be completed before performing
recording circuit adjustment.)
6. The adjustments should be performed for both L-CH and
R-CH,
¢ Switches and controls should be set as follows unless
otherwise specified.
DOLBY NR switch: OFF
TAPE: TYPE I
PB Level Adjustment
Record Playback Head Azimuth Adjustment
Note : Perform this adjustments for both decks,
Procedure :
1, Mode: FWD playback
Tape Speed Adjustment
test tape
P-4-A100
(10 kHz, — 10 dB)
L-CH
oscilloscope

2. Turn the adjustment screw and check output peaks. If the
peaks do not match for L-CH and R-CH, turn the
adjustment screw so that outputs match within 1 dB of
peak,
within
1dB
within
output 1qB
level "
—> screw position
L-CH R-CH
peak peak
Screen pattern
inphase 45° 90° 135° 180°
ny
good wrong
3. After the adjustments, apply suitable locking compound
to the parts. adjusted,
Adjustment Location :
Adjustment screw
REC “PB head (deck B)
or PB head (deck A)
Tape Speed Adjustment.
Procedure :
Mode : playback
test tape
WS-48B frequency counter
(3 kHz, 0 dB)
fieets ol
— set
O+
CN101 Bee ech
Pin @ (R-CH)
¢ High speed adjustment (Must be first Adjustment B deck)
1. Push HIGH speed button.
2,
Adjust
RV71
so
that
the
frequency
counter
reads
6,000
+
30Hz,
e NORMAL speed adjustment
1. Push NORMAL speed button.
2. Adjust RV72 so that the frequency counter reads
3,000+ 15Hz,
(See right for Adjusting Parts Location)
Frequency difference between deck A and deck B the
beginning of the tape should be within 1%,
Playback Level Adjustment
Procedure:
test tape
P-4-L300
(315Hz, 0 dB)
pee
CN101 Pin@ (L-CH)
Pin @(R-CH)
VIVM
Mode : FWD playback
DECK-A side RV11 (L-CH), RV21 (R-CH)
DECK-B side RV11 (L-CH), RV21 (R-CH)
so that the limits below are satisfied.
Adjustable limits :
CN101 level: — 7.7 £0.5dB (0.48 — 0.67V)
level difference between the channels: within 1.0dB
(See right for Adjusting Parts Location)
Record BIAS Current Adjustment | DECK B
Procedure :
1, Mode: record
AFC OSC
blank tape
C7) CS-122
j attenuator
oo O H }6Se mas
——— 500 ©
CN101 Pin@ (L-CH)
Pin © (R-CH)
1) 315 Hz
2) 10 kHz ~ 30 dB (0.0245 V)
2. Mode: Playback
recorded
portion
VTVM
pas
CN101 A ey
Pin @(R-CH)
Playback the signal recorder in step 1.
Confirm that the 10kHz playback output is 0+0,5dB relative
to the 315Hz output. If necessary, adjust RV12 (L-CH), RV22
(R-CH) and repeat the steps given above,
(See right for Adjusting Parts Location)

Record
Level
Adjustment
|
DECK
B
sAdjusdng:
alte,
Lecauer
Setting : TC MAIN BOARD (Conductor Side)
TAPE» TYPE -J
piiies We cic |
be-w bow
RV101 RV201
Procedure
:
CCH:
OR
1,
Mode:
record
REC
level
AFC
OSC
blank
tape
€°3
CS-122
5 attenuator
oS ot
Ll ooo. |
CN101 Pin@ (L-CH)
Pin © (R-CH)
315 Hz, — 30 dB (0.0245 V)
2.
Mode
:
playback
aera
AUDIO
BOARD
(Conductor
Side)
recorded
portion M901
RV72
ae 25) Normal speed ——»O
RV71
High speed —+O
CN101 Pin (Lor
Pin @ (R-CH)
3. Playback the signal recorded in step 1.
Confirm that the signal level is within the adjustment limits
below. If necessary, adjust RV101 (L-CH), RV201 (R-CH)
and repeat the step 1-3.
PB level
Adjustable : — 30.0 +0.5dB (0.0231 — 0.026V)
(See right for Adjusting Parts Location)

CD SECTION
Note :
1. CD Block basically constructed to operate with-
out adjustment. Therefore, check each item in
order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise
indicated.
3. Use the oscilloscope with more than 10M2 im-
pedance.
4, Clean an object lens by an applicator with neutral
detergent when the signal level is low than
specified value with the following checks.
S Curve Check
oscilloscope
O
——s
TP (FEO) ow—o}
TP(VC) o~w—lo-
Procedure :
1, Connect oscilloscope to test point TP (FEO) on
BD board.
2. Connect between test point TP (FES) and TP
(VC) by lead wire.
3. Turned Power switch on and actuate the focus
BD board
serch. (actuate the focus serch when disc table is
moving in and out.)
4. Check the oscilloscope waveform (S curve) is
symmetrical between A and B. And confirm peak
to peak level within 341Vp-p.
S curve waveform symmetry
A
oom + within 3:1Vp-p
5. After check, remove the lead wire connected in
step 2.
Note: * Try to mesure several times to make sure
that the ratio of A: B or B: A is more than
10: 7.
* Take sweep time as long as possible and light
up the brightness to obtain best waveform.
RF Level Check
oscilloscope
BD board
aan
TP (RFO) o+—° +
TP (VC)
Oo=ur——0 -
Procedure :
1. Connect oscilloscope to test point TP (RFO) on
BD board.
2. Turn Power switch on.
Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and
check RF signal level is correct or not.
Note:
Clear RF signal waveform means that the shape “©”
can be clearly distinguished at the center of the wave-
form.
VOLT/DIV ; 200mV
RF signal waveform TIME/DIV : 500nS
VAKAAKA/
ARR
AAA
AAMAS
level:
1.2 033 Vp-p
NIN) MWA
E-F Balance Check
oscilloscope
BD board
een
TP(TEO) o~w—lo>
TP(vc) ow—lo-
Procedure :
1. Connect test point TP (TEST) to ground and TP (TES) to
TP (VC) with lead wire.
2. Connect oscilloscope to test point TP (TEO) on
BD board.
Turn Power switch on.
4. Put disc (YEDS-18) in and playback.
5. Confirm that the osilloscope waveform is sym-
metrical on the top and bottom in relation to OV,
and check this level.
Traverse oscilloscope
A
it
mM
symmetry
level: 2£1Vp-p
6. Remove the lead wire connected in step 1.

RF PLL Free-run Frequency Check
Procedure :
1. Connect frequency counter to test point (PLCK)
with lead wire.
Main board frequency counter
na {ca )
TP (PLCK) O~t—j0+
2. Turn Power switch on.
3. Confirm that reading on frequency counter is
4, 3218MHz.
Focus/Tracking Gain
‘This gain has a margin, so even if it is slightly off.
There is no problem.
Therefore, do not perform, this adjustment.
Please note that it should be fixed to mechanical cen-
ter position when you moved and do not know
original position. |
Adjustment Location ;
MAIN BOARD (Conductor Side)
TP TEST
~~
TP PLCK
Adjustment Locations:
(BD board]
~- conductor side —
CN655
SYSTEM
CONTROL

3-1.
KSS~—240A
OPTICAL PICK UP BLOCK
DETECTOR
RF AMP
1¢200
CD SECTION BLOCK DIAGRAM
SECTION 3
DIAGRAMS
{BD BOARD]
CN1G2
+5V
ve
TRACKING
GAIN
FOCUS/TRACKING/SLED SERVO
EFM COMPARATOR
[MAIN BOARD}
DIGITAL SIGNAL
[c101 PROCESSOR
1c502
CN101 CN6O5
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FOCUS/TRACKING MOTOR DRIVE
SPINDLE/SLED MOTOR DRIVE
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SPENDLE
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CNGOT
(64) DOWNAWN
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([PANEL-B BOARD)
a
FUNCTION
SWITCH
(PANEL—U BOARD]
srs @)
supa (Q) SCOR (8)
SENSE (@)
xLTQ
AMUTE (2)
SQCLk (8)
SYSTEM CONTROL
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CN655
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TC/YCDP-R
SYSTEM
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AUDIO Sw
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AC
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Tc REC r
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cc ole
FROM/Tao
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BOARD
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+5V +
co+
VOLTAGE
(s)rst REGULATOR
[c803
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+10V
+7V
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POWER
TRANSFORMER
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be04
te
‘ai
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—10—
g
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[TRANSFORMER BOARD)
CN702
+UNREG
-UNREG
To
TC MAIN
BOARD
CN301
AC IN

HTC-D259/D359
CASSETTE DECK SECTION BLOCK DIAGRAM
{TC MAIN BOARD]
CN101
{[AUDIO-A
BOARD)
DOLBY
NR
(s)
REC
L
=
/REQ
EQ
REC
R
(c101
RV1TA
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LEVEL
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PB BO CD MAIN BOARD
HEAD CN601
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NORMAL SPEED LM ON/OFF (10) Bias -
CN403
(2/2) SYNCHRO
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“MOTOR cr al ee ae : ° =
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==
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