Sony HCD-H881 User manual

MICROFILM
HCD-H881/H881D
RVC
ANA
—
@ HCD-H881/H881D is the tuner,
deck, CD and amplifier section in
MHC-81 1, MHC-D7 and MHC-G8s.
Dolby noise
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol 0) are trademarks of
Dolby Laboratories Licensing Corporation.
for the U.S. model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION :
with 8 ohm loads, both channels driven,
from 40 - 20kHz ; rated 100 watts per
channel minimum RMS power, with no
more then 0.9 % total harmonic distortion
from 250 milliwatts to rated output.
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
Wavelength 780-790 nm
Frequency response
2Hz- 20 kHz (+0.5 dB)
Signal-to-noise ratio
More than 90 dB
Dynamic range More than 90 dB
CD DIGITAL OUT OPTICAL
(Square optical connector jack, rear panel)
Wavelength 600 nm
Output Level -18 dBm
Tuner section
FM stereo, FM /AM superheterodyne
tuner
FM tuner section
Tuning range US, Canadian model :
87.5- 108MHz (100kHz step)
EXCEPT US, Canadian,
East European model :
87.5- 108MHz (50kHz step)
East European model :
FM 1 : 65— 74MHz (10kHz step)
FM 2: 87.5~ 108MHz (50kHz step)
reduction manufactured under license from
MHe-881
Photo : HCD-H881
Tape deck
Section
SPECIFICATIONS
Antenna FM lead antenna
Antenna terminals
75 ohm unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range US, Canadian model :
531- 1,710kHz (with the tuning
interval set at 9kHz)
530- 1,710kHz (with the tuning
interval set at 10kHz)
AEP, UK, East European, German model :
MW : 53i- 1,602kHz (with the
tuning interval set at 9kHz step)
LW : 153- 279kHz
Italian model :
MW : 522~ 1,611kHz (with the
tuning interval set at 9kHz step)
LW : 153- 279kHz
E, Saudi Arabia, Argentine, Hong Kong,
Malaysia, Taiwan, Singapore, Australian,
Tourist, Indonesia, CIS, Mexican,
Thailand model :
531 - 1,602 kHz (with the
tuning interval set at 9 kHz)
530 - 1,710 kHz
(with the tuning interval set
at 10 kHz)
SW :5.95- 17.90MHz
(E3, Saudi Arabia, Hong Kong, Tourist,
Malaysia, Singapore, Indonesia, CIS model)
an Model Name Using Similar Mechanism
, CD Mechanism Type CDM38-5BD19
Section
ausaDI9
Model Name Using Similar Mechanism
Tape Transport Mechanism Type TCM-220WR2E
hear Ae
US Model
Canadian Model
HCD-H881/H881D
AEP Model
UK Model
E Model
Australian Model
Tourist Model
HCD-H881
Antenna AM loop antenna,
External antenna terminals
Intermediate frequency
450 kHz
Amplifier section
AEP, UK, German, Italian, East European, CIS model :
DIN 50W+50W (8 ohm, 1kHz, 0.8% THD)
RMS 60W+60W (8 ohm, 1kHz, 10% THD)
MUSIC power output
105W+105W (8 ohm, 1kHz, 10% THD)
US, Canadian model :
FTC 100W+100W (8 ohm, 40- 20kHz, 0.9% THD)
Continuous RMS _ power output
120W+120W (8 ohm, 1kHz, 5% THD)
Other model
Peak music power output
1200 W
Continuous RMS power output
80 W + 80 W (8 ohm atl
kHz, 5 % THD)
Inputs
VIDEO/MD IN (phono jacks):
voltage 450 mV,
impedance 47 kilohm
MIX MIC (phone jacks):
sensitivity 1 mV,
impedance 10 kilohm
— Continued on page 2 —
MINI HiFi COMPONENT SYSTEM
SONTY.

Outputs
VIDEO/MD OUT (phono jacks):
voltage 250 mV
impedance 1 kilohm
PHONES (stereo phone jack):
accepts headphones of
8 ohm or more
SPEAKER:
accepts impedance of 8 to
16 ohm
SURROUND/SUB SPEAKER:
accepts impedance of
16 ohm
SUPER WOOFER:
Voltage 1 V, impedance
1 kilohms
Tape player section
Recording system
4-track 2-channel stereo
Frequency response
(DOLBY NR OFF)
40 - 13,000 Hz (+3 dB),
using Sony TYPE I cassette
40 ~ 14,000 Hz (+3 dB), -
using Sony TYPE II cassette
Wow and flutter
+0,15% W. Peak (IEC)
0.1% W. RMS (NAB)
+0.2% W. Peak (DIN)
Supplied accessories
AM loop antenna (1)
Remote RM-SC100F (1) (HCD-H881 : US, Canadian model)
Remote RM-SD50 (1) (EXCEPT HCD-H881 : US, Canadian model)
Sony SUM-3 (NS) batteries (2)
FM lead antenna (1)
Speaker cords (4)
General
Power requirements
: Power
Destination Power requirements consumption
US model 275M
| Canadian model 120V AC, 60Hz
180W
Malaysia, Thailand mode! | 220 — 240V AC, 50/60Hz
AEP, German, Italian, CIS, =
East European model _ 220 — 230V AC, 50/60Hz
[UKmodet
Australian model ect ta 190W
E, Saudi Arabia, 110 ~ 120V/220V — 240V
190W
Hong Kong, Tourist , AC, 50/60Hz Adjustable
raga haga kL with the Voltage Selector
Dimensions Approx. 280 x 325 x
360 mm
(11 3/g x 12 7/g x 14 3/4 in)
(w/h/d)
incl. projecting parts and
controls
Mass US, Canadian model
Approx. 10kg (22 |b)
AEP, UK, German, Italian, East European, CIS model
Approx. 9.5kg (20 Ib 15 oz)
Other model
Approx. 9.0kg (19 Ib 14 oz)
Design and specifications are subject to
change without notice.
TABLE OF CONTENTS
Section Title Page
Specifications :::::ssseseerssceeeeeessscseceeseeeeseneeeeeeeerennseaseeees ]
1. SERVICING NOTES -00:-c-s:esecceeseeeeceeeseeteseuneeserenaeeeee 5
2. GENERAL
Index to Parts and Controls::::::tsreeceecerceee tee een sen eeneeseaes 6
3. DISASSEMBLY
Bo): ME rentiPanel REM OValemsetinstacneredesetaaneerndeetehacatters 7
3-2. CD Block Removal Peer eree eee eee eee eee e reer eee eee eee re 8
3-3. Lid (A)/(B) Assy, Cassette, Mechanism Deck Block
and HP/MIC Board Removal-:rs++s:testrserererseeeeeeenees 8
4. ADJUSTMENTS
4-1. Mechanical Adjustments -+:++++ereetrsereseeeeeeesteren sence 9
4-2. Electrical Adjustments hahbddadiecenaiewencatsstevaw ceeiidete aye aias 9
5. EXPLANATION OF IC TERMINALS +-0-1---:sesereseeee 17
6. DIAGRAMS
6-1.
Block
Diagram
—
CD
Section
—
crrrereeererereeeereeeess
22
6-2.
Block
Diagram
--
Main
Section
(1)
—
vrrrrstrerseteeees
24
6-3.
Block
Diagram
—
Main
Section
(2)
—
srrrretrseetsreees
27
6-4.
Circuit
Boards
Location
sssrrrrrrrrrsrterecerer
ete
seen
ences
31
6-5.
Printed
Wiring
Boards
—
Main
Section
—
sv
+rrrreres
33
6-6.
Schematic
Diagram
—
Main
Section
(2/2)
—
srr
35
6-7.
Schematic
Diagram
—
Main
Section
(1/2)
—
srr
37
6-8.
Schematic
Diagram
—
Panel
Section
—
srrrrrrrreeeeees
42
6-9.
Printed
Wiring
Boards
~
Panel
Section
—
++
+++++++++
44
6-10.
Printed
Wiring
Boards
—
BD
Section
—-++rr++rreeeree
47
6-11.
Schematic
Diagram
—
BD
Section
~
vrrrrrrstreeeeeeee
49
6-12.
Schematic
Diagram
—
TCB
Section
—
-++++rrerreeeee
es
53
6-13.
Printed
Wiring
Boards
—
TCB
Section
—
+++
++rrse++
57
6-14.
Printed
Wiring
Boards
—
Power
Section
—
+
++++++-++-
60
6-15.
Schematic
Diagram
—
Power
Section
—
+rrrv
reerrerere
63
6-16.
Schematic
Diagram
—
Audio
Section
—
tires
strrrrree
66
6-17.
Printed
Wiring
Boards
—
Audio
Section
—
+t+ere+++
69
6-18.
Printed
Wiring
Boards
~
Polar
Section
—
s+
71
6-19.
Schematic
Diagram
—
Polar
Section
—
srrrre
stertere
71
7. EXPLODED VIEWS
F-1. Chassis Section::::*:s+sssstcescssescasscesseeeeeeay eneennens 75
7-2. Front Panel Sectionssscsrccsttescreeeeereeeeeeeeens een eeeeses 17
7-3. Mechanism Deck Section-]-::errrrreeerertee eet crtterenes 78
(TCM-220WR2E)
7-4. Mechanism Deck Section-2::r:rtrrieeereteereen certerenen 79
(TCM-220WR2E)
7-5, Disc Table Assy Section::::+:s:ssseetseesseeen eeteeens 80
(CDM38-5BD19)
7-6. CDM Chassis Section::::tcctssscererseeeeeen eens eeeeeeeees 8]
(CDM38-5BD19)
9s fg bs Base Unit Section bdjeiealbeiele sore eecre 6 ddaaie vedas Oat) O8 Nek cee TS, 82
(BU-5SBD19)
8. ELECTRICAL PARTS LIST ----:::-sseecerereere recs 1 ee eeeeees 83

MODEL IDENTIFICATION
— BACK PANEL —
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
ss]
This appliance is classified as a
CLASS 1 LASER product. The
fee ae CLASS 1 LASER PRODUCT
KLASS 1 LASERAPPARAT MARKING is located on the rear
exterior.
This caution
+ INVISIBLE LASER RADIATION WHEN OPEN. a
CAUTION ' avOID EXPOSURE TO BEAM label is located
% A A iG NAR . + .
AOVARSEL ; SIREAMCOSAFERYOERE ER UOE. AF TUNKTION inside the unit.
UNDGA UDS ATTELSE FOR STRALING.
+ AVATTAESSA JA SUOQJALUKITUS OHITETTAESSA
VARO! " DLET ALTTINA LASEASATEILYLLE.
+ LASFRSTRALING NAR DENNA DEL AR OPPNAD
VARNING ' OCH SPARREN AR URXOPPLAD
eI ei Ae ai Bola doled oe Ene
+ USYNLIG LASEASTRALING NAR DEKSEL APNES
ADVARSEL |; UNNGA EKSPONERING FOR STRALEN
CAUTION
Use of controls or adjustments or performance made in Malaysia
of procedures other than those specified herein Reece lin ar fie Gace Sa ogo meen Sterne Ae! :
may
result
in
hazardous
radiation
exposure.
:
4-978-749-0[
]:
US
model
(H881)
: 4-978-749-1 ]: Canadian model (H881)
| 4-979-269-0 [] : US model (H881D)
i 4-979-269-1 []: Canadian model (H881D)
: 4-978-749-2(] : AEP model
| 4-978-749-3 [] : UK model
SAFETY-RELATED COMPONENT WARNING!! : 4-978-749-4(1]: German model
COMPONENTS IDENTIFIED BY MARK A\ OR DOTTED ; 4-978-749-5[_] : Italian mode!
LINE WITH MARK A\ ON THE SCHEMATIC DIAGRAMS : 4-978-749-6 (]: East European model
AND IN THE PARTS LIST ARE CRITICAL TO SAFE ; 4-978-749-7 [_]: CIS model
OPERATION. REPLACE THESE COMPONENTS WITH ; 4-979-268-0 1): E model
SONY PARTS WHOSE PART NUMBERS APPEAR AS ; 4-979-268-1 []: Saudi Arabia, Taiwan model
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- ; 4-979-268-2{_] : Australian model
LISHED BY SONY. : 4-978-268-3(]: Mexican model
: 4-979-268-4{]: Malaysia model
: 4-979-268-5[]: Singapore model
: 4-979-268-6[_]: Argentine model
ATTENTION AU COMPOSANT AYANT RAPPORT 4-979-268-7 []: Hong Kong model
A LA SECURITE! : 4-979-268-8[] : Tourist model
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE A made in Indonesia
SUR LES DIAGRAMMES SCHEMATIQUES ETLA LISTE 9200 Ss rrecerttraterenrtentsnerererttesrersrseastinetsesreunetssceserstsnscace
DES PIECES SONT CRITIQUES POUR LA SECURITE 7070 nn en enn rec tere nes nnn crarissnnerentsntttesnsrcsacd
DE FONCTIONNEMENT. NE REMPLACER CES COM. made in Thailand
POSANTS QUE PAR DES PIECES SONY DONT LES grrersesgracenenastesrsiity epee lg Gna ax creo ai se
NUMEROS SONT DONNES DANS CE MANUEL OU ; 4-979-277-0L]: US model (H881)
: : : 4-979-277-1 []: Canadian model (H881)
DANS LES SUPPLEMENTS PUBLIES PAR NY. :
cake - sd : 4-979-279-0] : US model (H881D)
i 4-979-279-1 [1]: Canadian model (H881D)
: 4-979-277-2[] : AEP model
! 4-979-277-3L): UK model
: 4-979-277-4[_]: German model
: 4-979-277-5 (]: Italian model
: 4-979-277-6[_]: East European model
: 4-979-277-7 LJ: CIS model
: 4-979-278-0L]: E, Indonesia model
: 4-979-278-2(]: Australian model
: 4-979-278-3(]: Mexican model
| 4-979-278-5["]: Singapore model
| 4-979-278-6 1]: Argentine model
; 4-979-278-7] Hong Kong model

SAFETY
After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:
Check the antenna terminals, metal trim, ‘‘metallized”
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5mA (500 microampers). Leakage
current can be measured by any one of three
methods.
1. A commercial leakage tester, such as the
Simpson 229 or RCA WT-S40A. Follow the
manufacturers’ instructions to use these instru-
ments.
2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.
CHECK-OUT
3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The “limit” indication is 0.75 V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and. Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)
To Exposed Metal
Parts on Set
AC
voltmeter
; | (0.75 V)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.

SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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. Therefore, when checking the laser diode emission,
observe more than 30cm away form the objective lens.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
@ Code number of Chuck Plate Jig : X-4918-255-1
@ Tray (Slide) getting out procedure on the power supply is OFF
Rotate the BU CAM assembly in the direction of the arrow and pull out the slide.
Tray (Slide) >

SECTION 2
GENERAL
Index
to
Parts
and
HIGH
SPEED
DUBBING
button
CD SYNCHRO button
Controls Gil @ REC button
49 811 PAUSE button
Refer to the pages indicated in parentheses (3 KARAOKE PON/MPX button
for details on how to use the controls. 44 MIC LEVEL knob
Controls with an asterisk have indicators
on themselves.
MULTI FUNCTION CONTROL
Front Panel buttons
The button you can operate the CD player,
Amplifier/Tuner section
tuner and the tape player light up.
REPEAT
VALL OIG PLAY MODE
MeEMony
TANT
Ye
at
IT
Rear panel
EXCEPT E3, EA, MY, SP, TW, HK,
JE, JA model
E3, EA, MY, SP, TW, HK,
JE, IA model
(1) POWER switch
{2} LOOP button
(3) DISC SKIP button
(4)
{5}
(6)
Disc tray
TIMER button
MENU 1-4 button
DISPLAY/DEMO button
(8) CLIP ERASE button
(9] CLIP PLAY button
DSP button
(1 DIGITAL ECHO button
{(J MULTI FUNCTION CONTROL button
(3 CLIP A~C button
(14 DISC 1 ~3 button
(i3) 2 OPEN/CLOSE EX-CHANGE button
[1 00 (play /pause) button*
(17 Ml (stop) button
(19 P FILE button
{9 TUNER/BAND button*
2G EFFECT ON/OFF button*
21) FUNCTION button
ENTER/NEXT button
(23 DBFB button
GROOVE button
(25) VOLUME knob
SONIC FORMATION button
JOG dial
(28 FREQUENCY +/- buttons
[29 Deck A
BQ DIRECTION button
61) DOLBY NR button
QJ </> (fast forward/rewind) button
G3] 10 (play) button®
G4 M (stop) button
69 @ EJECT button
PHONES jack
G7 Mix MIC jack
G8 Deck B
NNODEDOOOHNOOOdLOHoDADLD
NOO0IDODADDDOOsOONDOND
DODO ONNARNANAARAANAAANAN
(ICD DIGITAL OPTICAL OUT jack
(2] VIDEO/MD in/out jacks
{(B] a super woofer jack (MHC-D7 only)
[4] ANTENNA terminals
[5] SURROUND SPEAKER L/R jacks
(6)SPEAKER jacks
This section
Display Window
(1) Disc tray indicator
(2) Music calendar
(3}CD/TUNER indicator
(4) Graphic Equalizer indicator
[5] CLIP indicators
(6)CD playback indicators
Multi display
(8) Tuning indicator
(9) DOLBY NR indicator
(10 Timer indicators
{1 Directon mode indicators
(3 VOLUME indicators
(13 Tuner indicators
(14 SYNC REC indicator
(13 DBFB indicator
(18 SUR 1/2 indicators
[17] Karaoke PON/MPX indicators
Remote
EXCEPT HCD-H881 : US, Canadian model
(1) SLEEP button
{2] LOOP button
18 cD button
[4] TUNER/BAND button
1 DECK A (> /DECK B(> button
(6} FUNCTION button |
(7) > / e button
|{8] MUSIC MENU ON/OFF button
| 6/8 button
[10] POWER switch |
la OD (pause) button
{03 oO (stop) button
| 83 6) / Ce] AMS* button
| i4 1 / £ (rewind/ fast forward) button
3 EDIT button
[16 CHECK button
| [17] DISC SKIP button
| 8 CLEAR button
| {19 VOL (+/-) button
|
|
|
|
|
|
|
|
|
|
|
|
|
|
[+ AMS=Auto Music Sensor
is extracted from
instruction manual.
Remote
HCD-H881 : US, Canadian model
[1] FUNCTION button
[2] SLEEP button
[3] CD b (play) button
[4] TUNER/BAND button
| [5] <> Weck A) button
(6} <1&> (Deck B) button
44 / PPI (TUNING ~ / + ) button
€4/ b> (deck) bution |
[8] MUSIC MENU SELECT ON/OFF button
fig [> (play) button
fh) Al button
[1 Ke / bt button
[19] <44/ pp button
{14 DISC SKIP ~ / + button
{15] SYSTEM POWER switch
[16] LOOP button |
(7 CHECK button |
| [f@} CLEAR button
[f9 D. SKIP button
BO (stop) button
Bi] HI (pause) button
22 REPEAT button
ex Wi (stop) button ioc
24) CHECK button
28] CLEAR button
100CD
* Abbreviation
E3 : Tuner sections SW BAND
exist.
EA: Saudi Arabia
MY: Malaysia
SP: Singapore
TH: Thailand
HK : Hong Kong
JE: Tourist
(A __ ; Indonesia
TW: Taiwan

SECTION 3
DISASSEMBLY
Note
:
Follow
the
disassembly
procedure
in
the
numerical
order
given.
3-1. FRONT PANEL REMOVAL
@ Front Panel Section
© Screw
+BVTP 3X8
@ Wire (Fiat type)
(19core)
@ Wire (Flat type) (11 core)
a @ Screw
+BVTP 3X8
@ Wire (Flat type) (21 core)
@ Wire (Flat type) (13core)
@ CN202 (9pin)
© MAIN board
CN203 (8pi
@ cN1202 (10pin) a ica ith
POWER board
+BVTP 3X8

3-2. CD BLOCK REMOVAL
CD Block (CDM38-5BD19)
@ Screw
+BVTP 3X8
@
Loading
Panel
@
Screw
+BVTP 3X8
Mechanism Deck Block (TCM-220WR2E)
Front Panel Section
@ Screw
+BVTP 2.6X8
Lid (A) assy, Cassette
Lid (B) assy, Cassette
@ HPMIC board

SECTION 4
ADJUSTMENTS
4-1, MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-
moistened swab :
record/playback head _ pinch roller
erase head rubber belts
capstan :
2. Demagnetize the record/playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound
to the parts adjusted.
5. The adjustments should be performed with the rated
power supply voltage unless otherwise noted.
@ Torque Measurement
Meter Reading
sata om 4 0
(0.50 — 0.84 oz*inch)
Forward 2 to 6gecm
CQ-102C (0.028 ~ 0.083 ozeinch)
36 to 6lgecm
CQ-102RC (0.50 — 0.84 ozsinch)
Reverse CQ-102RC
Back Tension
FF, REW CQ-201B
® Tape Tension Measurement
Motor Reading
CQ-403A more than 100g (3.53 02)
CQ-403R more than 100g (3.53 oz)
2 to 6gecm
(0.028 — 0.083 ozeinch)
61 to 143g*cm
(0.85 — 1.99 ozeinch)
4-2. ELECTRICAL ADJUSTMENTS
DECK SECTION
1. The adjustment should be performed in the publication.
(Be sure to make playback adjustment at first.)
2. The adjustment and measurement should be performed for
both L-CH and R-CH.
@ Switch position
DOLBY NR switch : OFF
FUNCTION button : OFF
EFECT switch : OFF
DBFB switch : OFF
3. Deck section electrical adjustments are made in test mode by
pressing DISPLAY/DEMO, TUNER/BAND, MENUI at the
same time.
4. Input point and output level measurement point.
Output level
—— measurement Input point
paint AF OSC
21.8mV ( - 310B)
R-CH 47k oie)
Output level attenuator re)
measurement |
point
o—-o
ooo | |
ly O———0
(MAIN BOARD}
(Component side)
@ Test Tape
[Tape | Contents [Use Ss
0 dB=0.775V
Record/Playback Head Azimuth Adjustment
Procedure :
1. Forward Playback mode
Reverse Playback mode
test tape
P-4-A100
(f0kHz, — 10dB)
Output level measurement point

2. Turn the adjustment screw for the maximum output levels.If
these levels do not match,turn the adjustment screw until both
of output levels match together within 1dB.
L-CH
peak
R-CH
eak
Screw P
position
— screw angle
L-CH R-CH
peak peak
3. Playback Mode
test tape
P-4-A100
(10kHz, ~ 10dB)
L-CH
Oscilloscope
Output level measurement point
(see page 9)
screen pattern
inphase 45° )
good
4. Change the review playback mode and repeat the steps | to 3.
5. After the adjustment, lock the adjustment screw with suitable
locking compound.
Adjustment Location :
— record/playback head (Deck A and B) —
Forward Reverse
Side Side
| ane ene
Adjustment Screws
Tape Speed Adjustment
Procedure :
@ Perform high speed adjustment before normal speed adjust-
ment.
Mode : Playback
test tape
WS-48B
(3kHz, 0dB)
frequency counter
Output level measurement point
(see page 9)
Frequency counter
5,970 to 6,030Hz
* High
a
PB Rv6s1 |
Normal 2,940 to 3,090Hz
* Continue to press HIGH SPEED DUBBING switch (S545) in
playback mode : High speed playback.
Frequency difference between the begining and the end of the
tape should be within + 3%.
Frequency difference between deck A and deck B the biginning
of the tape should be within 1.5%.
Adjustment Location : AUDIO board.
(see page 11)
Playback Level Adjustment
Procedure :
~ FWD Playback Mode —
test tape
P-4-L300 VTVM
(315Hz, OdB)
Output level measurement point
(see page 9)
Deck A is RV311(L-CH) and RV411(R-CH), deck B is RV301
(L-CH) and RV401 (R-CH) so that adjustment within adjustment
level as follows.
Adjustment Level :
LINE OUT level : — 7.5 + 0.5dB (0.31 to 0.35V)
Level Difference between Channels : within 0.5dB
Confirm the OUTPUT level does not change in play back mode
while changing the mode from playback to stop several times.
Adjustment Location : AUDIO board.
(see page 11)

Record Bias Adjustment
Procedure :
1. Record mode
AF OSC 1) 315Hz
21.8mV ( — 31dB) blank tape
2) 10kKHZ CS-123
attenuator 47K Q
oo
o—o O
{lL ooo | —
oo
[ ee |
Input point (see page 9)
2. Playback mode
recorded
portion
Output level measurement point
(see page 9)
3. Confirm playback the signal recorded in step 1 become
adjustment level as follows.
4. If these levels do not adjustment level, adjust the RV341
(L-CH) and RV441 (R-CH) to repeat step 1 and 4.
Adjustment level : Playback output of 315Hz to playback output
of 10kHz: + 0.5dB ( — 1.3 to 1.3mV).
Adjustment Location : AUDIO board.
Record Level Adjustment
FUNCTION button : CD
Procedure :
1. Record mode
blank tape
21.8mV ( - 31dB) 05:99
AF OSC
attenuator
3) eee
o—o o
Ilooo |
[ ne |
input point (see page 9)
2. Playback mode
recorded
portion
Output level measurement point
(see page 9)
3. Confirm playback the signal recorded in step 1 become
adjustment level as follows.
4. If these levels do not adjustment level, adjust the RV301
(L-CH) and RV351 (R-CH) to repeat step 1 and 4.
Adjustment Level :
OUT PUT level : — 26dB + 0.5dB (36.7 to 41.1mV)
Adjustment Location : MAIN board
Adjustment Location
[AUDIO BOARD] — Component side —
RV301 : Playback Level (Deck B L-CH)
RV401 : Playback Level
(Deck B R-CH)
RV65! :; Tape Speed (Normal
RV652 : Tape Speed
(High)
RV311: Playback Level
RV341 : Record Blas (L-CH) (Deck A L-CH)
RV441 : Record Bias (R-CH)
RV411 ; Playback Level
(Deck A R-CH)
[MAIN BOARD] — Component side —
RV351 : Record Level (R)
Output level measurement point
Input point
Ot : Record Level (L)

TUNER SECTION
Precautions in Repairing
Note. 1 : The adjustment should be performed in the publication.
(MW — FM SW)
Note. 2: As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
@ Abbreviation
CND : Canadian AUS: Australian
IT _ : Italian JE : Tourist
G : German AR _ : Argentine
EE :EastEuropean E2 _ : Tuner sections SW BAND do
SU _ : Russian not exist.
IA _— : Indonesia E3 : Tuner sections SW BAND
EA — : Saudi Arabia exist.
HK _ : Hong Kong MX _ : Mexican
SP _: Singapore TH _ : Thailand
MY : Malaysia
MW Tuned Indication Lighting Level
Setting :
Band : MW
loop antenna B
Procedure :
1. Set loop antenna A so that the loop antenna B input level
becomes 55dB yu /m (0.6mV/m)
2. Tune the set to 999kHz (at 9kHz step) or 1,050kHz (at 10kHz
step).
3. Adjust RV41 (AEP, UK, G, IT, E3, EA, MY, SP, HK, JE, IA,
EE, CIS model), RV42 (US, CND, E2, AUS, AR, MX, TH
model) so that the TUNED indicator goes on.
loop antenna A
AM PF signal
generator
Carrier frequency : 999kHz (at 9kHz step) or
1,050kHz (at 10kHz step)
Adjustment Location : TCB board (see page 14)
FM Tuned Indication Lighting Level
Note : Always make the tuning level adjustment first.
(Since it affects the the FM tuning level.)
Setting :
Band : FM
FM PF stereo signal
generator
FM ANTENNA terminal
75 Q coaxial
Canrier frequency : 98MHz
Modulation : OFF
Output level : 0.018mV (25dBy )
Procedure :
1. Tune the set to 983MHz.
2. Adjust RV41 (US, CND, E2, AUS, AR, MX, TH model),
RV42 (AEP, UK, G, IT, E3, EA, MY, SP, HK, JE, IA, EE,
CIS model) so that the TUNED indicator goes on.
Adjustment Location : TCB board (see page 14)
SW Control Voltage Adjustment
(Frequency Coverge Adjustment)
(E3, EA, MY, SP, HK, JE model)
Setting :
Band : SW
Procedure :
1. Connect digital Voltmeter to diode D1 center lead and ground.
2. Adjust for a following value reading on digital voltmeter.
Adjustment | Reading on digital
Adjustment Location : TCB board (see page 14)
SW Tracking Adjustment
(E3, EA, MY, SP, HK, JE, IA, CIS model)
Setting :
Band : SW
AM FF signal
generator VTVM
Modulation : 400Hz
30% modulation SPEAKER terminal
AM ANTENNA terminal
Procedure :
Adjust for maximum reading on VTVM
Adjustment
| Set frequency part
SW
© Repeat the procedures is each adjustment several times, and the
frequency coverage and tracking adjustment should be finally
done by the trimmer capacitors.
Adjustment Location ; TCB board (see page 14)

FM Poler Adjustment (CIS model only)
Connection 1 :
FM RF SSG
FM ANTENNA terminal (75 Q)
Carrier frequency : 69MHz
Output level: 1mV (60dBV) (at 75Q OPEN)
Modulation ; AUDIO 1kHz, 10kHz Deviation
Connection 2 :
AF OSC
FM RF SSG
FM ANTENNA terminal (75 2)
Audio 31.25kHz external modulation terminal
Carrier frequency : 69MHZ
Output level :1 mV (60dBY) (at 75Q OPEN)
Modulation: AUDIO 31.25kHz, 10kHz Deviation
(EXTERNAL MODULATION)
Procedure :
1. Sef the modulation of FM RF SSG to AUDIO 1kHz, 10kHz
deviation according to “Connection 1”.
Tune the set to 69 MHz.
3. Adjust the RV1702 so that the reading of frequency counter
connected to TP1702 becomes within 31.25kHz + 0.0SkHz.
(VCO adjustment)
4. Then record the reading of the level meter connected to
TP1701.
5. Set. the modulation of FM RF SSG to AUDIO 31.25kHz,
10kHz deviation according to “Connection 2”.
6. Tune the set to 69 MHz.
Set the CT1701 to be mechanical center.
8. Adjust the L1701 so that the reading of the level meter
connected to TP1701 becomes maximum.
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 becomes maximum. (SUB CARRIER
PEAK Adjustment)
9. Adjust the RV1701 so that the level at the moment becomes
14dB higher value than the level recorded in step 4. (SUB
CARRIER LEVEL Adjustment)
N
n
Adjustment Location : POLER board (see page 14)

Adjustment Location
[TCB BOARD] (Component side)
CVI: SW Tacking Adjustment
Tt : SW Tacking Adjustment
RV41 (AEP, UK, G, IT, E3,
EA, MY, SP, HK, JE. | my Tuned indication
1A, EE, CIS model): ¢ 1 ighting Level
RV42 (US, CND, E2, AUS,
AR, MX, TH model :
CV2 : SW Control Voltage Adjustment
T2 ; SW Control Voltage Adjustment
RV41 (US, CND, E2, AUS,
AR, MX, TH model) :
RV42 (AEP, UK, G, IT, E3,
EA, MY, SP, HK, JE,
1A, EE, CIS model :
FM Tuned indication
Lighting Level
-[(POLER BOARD] (Component side)
level meter
iC1701
TP1702
vco
GND
vco
frequency counter
RVI702
(VCO)
AVI701
(SUB CARRIER LEVEL)
CTI7QI
(SUB CARRIER PEAK)

CD SECTION
Note :
1. CD Block basically constructed to operate without adjust-
ment. Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indi-
cated.
3. Use the oscilloscope with more than 10M Q impedance.
4. Clean an object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
Focus Blas Adjustment
This adjustment is to be done when the optical block is replaced.
Adjustment procedure :
oscilloscope
(DC range)
BD board
__
TP (RF) —<———_ T° +
TP (VC) =
1. Connect oscilloscope to test point TP (VC) and TP (RF) on
BD board.
2. Turned power switch ON. (Stop mode)
. Put disc (YEDS-18) in and press the ta button.
4. Adjust RV101 so that the oscilloscope waveform is as shown
in the figure below (eye pattern).
A good eye pattern means that the diamond shape (©) in the
center of the waveform can be clearly distinguished.
Ww
@ RF signal reference waveform (eye pattern)
VOLT/DIV : 0.2V
TIME/DIV : 500ns
1,3 + 0.3Vp-p
When observing the eye pattern, set the oscilloscope for AC
range and raise vertical sensitivity.
Adjustment Location : BD board (see page 16)
S-Curve Check
oscilloscope
BD board
en Ss
TP (FEO) a Raa Te +
TP (VC) =
Procedure:
1. Connect oscilloscope to test point TP (FEO) and BD board.
2. Connect between test point TP (FOK) and GND by lead wire.
3. Turned Power switch on.
4. Put disc (YEDS-18) in and tumed Power switch on again and
actuate the focus search. (actuate the focus search when disc
table is moving in and out.)
5. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within
2.4 + 0.7Vp-p.
S-curve waveform
symmetry
within 2.4 + 0.7Vp-p
6. After check, remove the lead wire connected in step 2.
Note : @ Try to measure several times to make sure that the ratio of
A:BorB:A is more than 10: 7.
@ Take sweep time as long as possible and light up the
brightness to obtain best waveform.
Adjustment Location : BD board (see page 16)
RF Level Check
oscilloscope
BD board
PN
TP (RF) —<—— TT" +
TP (VC) <
Procedure :
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turmed Power switch on.
3. Put disc (YEDS-18) in and press the 10 button.
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 waveform.
RF signal waveform VOLT / DIV : 200mV
TIME / DIV : 500nS
level: 1.3 + 0.3Vp-p
Adjustment Location : BD board (see page 16)

E-F Balance Check
oscilloscope
(DC range)
BD board
eGCr-"—_—~
TP (TEO) ame Ue +
TP (VC) =
Procedure :
1.
“Wn PwWd
Ground main board IC701 (pin @ ) with the lead wire.
Connect oscilloscope to test point TP (TEO) on BD board.
Turned Power switch on.
Put disc (YEDS-18) in and press the [a0 button.
Confirm that the osilloscope waveform is symmetrical on the
top and bottom in relation to OV, and check this level.
Traverse waveform
Specified value: @
6.
level ; 300 + 100mVp-p
X 100 = less than + 7%
A-B
2(A+B)
@ A+B = 300 + 100mVp-p
Remove the lead wire connected in step 1.
Focus/Tracking Gain Adjustment (RV102, RV103)
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 center position
when you moved and do not know original position.
Adjustment Location:
[BD BOARD] — Conductor side —
i ° FEI
Ter +?
°
GNDO
IC104 noe
o &
: °
@ FEO
Aviot 8 ove 10104
@]
RV103

SECTION 5
EXPLANATION OF IC TERMINALS
IC500 ASD0204-012-3BA (SYSTEM CONTROL /FL DRIVE)
[rinne.[—Pinnane | WO
LED8 | O | LED drive output. (EFFECT ON/OFF, GROOVE) Zi
LED7 | © | LED drive output. (DECK B : > PLAY, <J PLAY)
Description
—
N
i
LED6
LEDS
LED4
eal
LED3
LED2
Fs}
LED1
RESET
X2
| O | LED drive output. (DECK B : @ REC, I PAUSE)
| O | LED drive output. (DECK A : > PLAY, <I PLAY)
LED drive output. (TUNER/BAND, CLIP C)
Oo LED drive output. (ENTER/NEXT, SONIC FORMATION)
Oo LED drive output. (MULTI JOG STATION Ke<@ /D> 1, tmn/ tm )
Oo LED drive output. (MULTI JOG STATION +/ —)
I
Reset terminal.
Oscillator connection terminal. (SMHz)
12 Xl Oscillator connection terminal. (SMHz)
13 IC (VPP) GND connection.
Oscillator connection terminal. (Not used : OPEN)
JOG dial encoder input.
16 VDD Power supply. (+5V)
LED10 LED drive output. (CLIP B, DSP)
LED9 LED drive output. (CLIP A, ECHO)
KEY-SEL Not used. (OPEN)
NI NI dS
wa Ww
Nlrwolrol || =
+ NJ] |} oO]wolo;n
VOL-B
REQ-GM
CLK-MG
DATA-GM
DATA-MG
AVSS Q
ND
26 - 29 SPEANA4 - 1 I Spectrum analyzer signal input.
30 - 33 KEY4-1 I Key data input. (A/D converter)
34—C‘dG:C!” AVDD ie Power supply for analog. (+5V)
35 AVREF - Reference Voltage for A/D converter. (+5V)
36 VOL-A I Volume encorder input.
37 JOG-A I JOG dial encorder input.
38 RDY-MG I Master control with Ready signal input. L: Ready |
39 SIRCS I SIRCS signal input.
40 VSS I GND
41 LED14 LED drive output. (DISC 1)
LED SELECT
LED drive select output.
LED13
LED drive output. (1)
LED drive output. (DISC 3)
45
: 46
4
LED drive output. (DISC 2)
Power supply. (+5V)
Not used. (OPEN)

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o- [ LED drive out ULTITUNER)——SSSCSCS~S~*™
Ts [tsi [0 drive our (MUETITIMER) SSCS
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es
-o
Eon
Segment output to FL501.
Power supply for fluorescent indicator tube.
Segment output to FL501.
rid output to FL501

IC701 TMP87CS64YF - 6361 (MASTER CONTROL)
Pin
No.
}
Pin
name
VO
Description
be]
VSS
—
|
GND
2
X
OUT
Oo Oscillator
connection
terminal
(]OMHz).
3
XIN
e
I
l
Oscillator
connection
terminal
(1OMHz).
4
RESET
I
Reset
signal
input
terminal.
L:
RESET
|
5
X
OUT
Oo
Oscillator
connection
terminal
(32KHz).
=
6
XIN
I
Oscillator
connection
terminal
(32KHz).
F 7
GND
(TEST)
-
Not
used
(GND).
8
AC
CUT.
a
Power
supply
DET
input
terminal.
9
SUPER
WOOFFER
ON
O
|
SUPER
WOOFFER
ON/OFF
control.
10
ST
MUTE
ON
O
|
TUNER
Mute
ON/OFF
control.
i
[ul
180A PLAY
I
|
Notused
(GND).
12
180
B
PLAY
I
Not
used
(GND).
13
180
B
REC
I
Not
used
(GND).
14
V
¢
DET
CLOCK
CHECK
I
Voltage
Detection
terminal.
(for
CLOCK
BACK
UP)
15
DO
UP
(5CD)
1
|
UP/DOWN
MOTOR
control.
Not
used
(OPEN).
:
16
TRY
CLOSE
(1CD)
I
|
Not
used
(GND).
I
Rotary
encoder
input
terminal.
I
Loading
out
switch
input.
21
LOAD
IN
O
|
Loading
Motor control
output
(Loading
input).
22
LOAD
OUT
oO
Loading
Motor control
output
(Loading
output).
24
TBL-R
O
|
Table
motor
control
output.
25
SCOR
ne
Sub
code
SYNC
input
from
DSP
(IC103).
26
TBL
SENS
ae
Table
Sensor
input
27
RDS
INT
I
RDS
DATA
START
signal
input.
28
RDS
DATA
sais
I
ah
RDS
DATA
input.
29
DF
LAT
oO
|
Latch
output
to
the
digital
filter
(IC
104).
30
SENS
I
Sens
signal
input
from
the
DSP
(IC103).
31
ce
XRST
O
|
CDreset
signal
output
terminal.
32
MG
«
RDY
I/O
|
System
control
(C500)
with
Ready
signal
input/output.
L
:
Ready
|
33
ADI
1
|
CDtest
modeterminal.
|
L:
ADJ
Mode
|
34
GM
REQ
I
Data
transmission
request
input
from
system
control
(IC500).
35
MG
CLK
oO
Clock
output
for
communications
with
system
control
(IC500).
36
GM
DATA
I
Serial
data
input
from
system
control
(IC500).
7
37
MG
DATA
O
Serial
data
output
to
system
control
(IC500).
38
CD
CLK
O
| Serial
data
transfer
clock
output
to
DSP
(fC103)
and
digital
filter
(C104).
39
ADJ
2
1
|
CDtest
mode
terminal.
L
:
ADJ
2
Mode
40
CD
DATA
oO
Serial
data
output
to
DSP
(1C103)
and
digital
filter
(IC104).
41
DBFB
ON
O
|
Not
used
(OPEN).
[42
=
DBFB
OFF
Not
used
(OPEN).
7
43
FOCUS
SW
High-pass
gain
select
output
of
the
focus
servo.
SQ CLK
SQ DATA
Sub code Q read clock output to the DSP (IC 103).
Sub code Q data input from DSP (IC 103).

Pin No. Pin name vO Description
46 X-LAT Berke, | Serial data latch output to the DSP ([C103).
47 TEST O Terminal for test mode.
48 VAREF - Reference Voltage for A/D converter. (+5V) Tl
49 VASS - GND for analog (GND).
50 VSS - GND |
51 VDD - Power supply. (+5V)
52 [ SPEC al I Terminal for mechanism selection. :
l 53 DESTINATION I Terminal for model selection.
DISC SENS I Disc Sensor input terminal.
TC RELAY O REC/PB head selector signal output.
A-SHUT I Deck-A reel table detect.
B-SHUT I Deck-B reel table detect.
B-HALF I Deck-B cassette detect.
A-HALF I Deck-A cassette detect.
220 A PLAY ] Deck-A play detect.
220 B PLAY I Deck-B play detect.
62427-LAT te) Serial data latch output to IC 901.
K-CON-LAT O | Not used (OPEN).
VOL-LAT (AV) O | Not used (OPEN).
65 FRONT * SP RELAY B oO Front speaker Relay Drive output. |
| 66 | REAR*SPRELAYC | O | Rear speaker Relay Drive output.
POWER ON O | Power ON output. L: ON
68 OQ | CD power switch output. |
69
O
|
Not
used
(OPEN).
MUTE O | Mute ON/OFF control. L: Mute ON
COM CLK O | System clock (COM) output. : |
72 COM DIN ] Serial data input from tuner.
73 COM DATA O Serial data (COM) output.
74 K-COM-ON oO Not used (OPEN).
75 RIGID LED oO Not used (OPEN).
76 MD/VIDEO O MD/VIDEO level chage output. (not used) |
77 DBFB HIGH O- | DBFB LOW/HIGH control. L: DBFB High
78 CD PWM SEL O Tray mechanism control selection (GND connection).
79 PRO LOGIC RELAY O | Not used (OPEN).
80 TC-A O | Deck A/B Selection output. L: Deck-A
8] NORM O NORMAL/HIGH Selection output. L : Normal (for tape EQ)
82 BIAS OFF O | Bias ON/OFF Selection output. L: Bias OFF
83 REC MUTE O | REC Mute ON/OFF Selection output. L: Mute ON
84 NR OFF oO NR ON/OFF Selection output. L: NR OFF
PB O | REC/PB Selection output. L:PB
PASS *e AMP/DOLBY oO [ Paley pass signal output.
LINE MUTE ON O | Line mute signal output. L: Mute ON
CAP « M HIGH O | Capstan moter HIGH/LOW Selection output. L: High
A-TRG O | Trigger motor control output.
co)
| Trigger motor control output.