Sony HCDGRX-7-J Service manual
HCD-GRX7/GRX7J/R700/
RX77/RX77S
SERVICE MANUAL
HCD-GRX7/GRX7J/R700/RX77/RX77S
are the Amplifier, CD player, Tape Deck
and Tuner section in MHC-GRX7/
GRX7J/R700/RX77/RX77S.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation.
Photo: HCD-RX77
CD
Section
T APE
DECK
Section
Canadian Model
HCD-RX77
AEP Model
HCD-R700/RX77/RX77S
UK Model
HCD-R700/RX77S
E Model
HCD-GRX7/GRX7J
Austr alian Model
HCD-GRX7
Tourist Model
HCD-GRX7J
Model Name Using Similar Mechanism HCD-H991AV
CD Mechanism Type
Base Unit Type BU-5BD29AL
Optical Pick-up Type KSS-213D/Q-NP
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type
CDM38L-5BD29AL/
CDM38LH-5BD29AL
TCM-230AWR1/
230PWR1
Amplifier section
Canadian model:
Continuous RMS power output (reference)
100 + 100 watts
(8 ohms at 1 kHz, 10% THD)
Total harmonic distortion less than 0.07%
(8 ohms at 1 kHz, 55 W)
European and Russian models:
DIN power output (rated) 60 + 60 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
80 + 80 watts
(6 ohms at 1 kHz, 10% THD)
Music power output (reference)
135 + 135 watts
(6 ohms at 1 kHz, 10% THD)
SPECIFICA TIONS
Other models:
The following measured at AC 110, 220 V 50/60 Hz
DIN power output (rated) 85 + 85watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
110 + 110 watts
(8 ohms at 1 kHz, 10% THD)
The following measured at AC 120, 240 V 50/60 Hz
DIN power output (rated) 105 + 105 watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
130 + 130 watts
(8 ohms at 1 kHz, 10% THD)
Peak music power output (reference)
1500 watts
– Continued on next page –
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
Specifications (continued)
Inputs
MD/VIDEO IN: voltage 450 mV/250mV,
(phono jacks) impedance 47 kilohms
MIX MIC: (phone jack) sensitivity 1 mV, impedance 10
kilohms
Outputs
MD/VIDEO OUT: voltage 250 mV,
(phono jacks) impedance 1 kilohms
PHONES: accepts headphones of 8 ohms
(stereo phone jack) or more
SPEAKER:
European and Russian models: accepts impedance of 6 to 16 ohms
Other models: accepts impedance of 8 to 16 ohms
SURROUND SPEAKER (Canadian model):
accepts impedance of 16 ohms
SUPER WOOFER (GRX7/GRX7J/RX77: Canadian models):
Voltage 1 V, impedance 1 kilohm
CD player section
System Compact disc and digital audio system
Laser Semiconductor laser (λ=780nm)
Emission duration: continuous
Laser output Max. 44.6 µW*
*This output is the value measured at
distance of 200 mm from the objective
lens surface on the Optical Pick-up
Block with 7 mm aperture.
Frequency response 2 Hz - 20 kHz (±0.5 dB)
Wavelength 780 -790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wavelength 600 nm
Output Level -18 dBm
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 40 - 13,000 Hz (±3 dB),
(DOLBY NR OFF) using Sony TYPE I cassette
40 - 14,000 Hz (±3 dB),
using Sony TYPE II cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
Middle Eastern models:
MW: 531 - 1,602 kHz
(with the interval set at 9 kHz)
SW: 5.95 - 17.90 MHz
(with the interval set at 5 kHz)
Other models:
MW: 531 - 1,602 kHz
(with the interval set at 9 kHz)
530 - 1,710 kHz
(with the interval set at 10 kHz)
SW: 5.95 - 17.90 MHz
(with the interval set at 5 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
Canadian model: 120 V AC, 60 Hz
European and Russian models: 230 V AC, 50/60 Hz
Mexican model: 120 V AC, 50/60 Hz
Australian and Israel models: 220 - 240 V AC, 50/60 Hz
Thai model: 220 - 240 V AC, 50/60 Hz
Other models: 110 - 120 V or 220 - 240 V AC,
50/60 Hz
Power consumption
Canadian model: 195 watts
European and Russian models: 140 watts
Other models: 250 watts
Dimensions (w/h/d) Approx. 280 × 335 × 380 mm
(111/8 × 131/8 × 15 in.)
Mass
Canadian model: Approx. 9.5 kg (20 lbs. 15 oz.)
European and Russian models: Approx. 9.1 kg (20 lbs. 1 oz.)
Other models: Approx. 10.2 kg (22 lbs. 8 oz.)
Supplied accessories: AM loop antenna (1)
Remote RM-SR5 (1)
Batteries (2)
FM lead antenna (1)
Speaker cords (2)
Front speaker pads (8)
Design and specifications are subject to change without notice.
FM tuner section
Tuning range 87.5 - 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohm unbalanced
Intermediate frequency 10.7 MHz
UKV tuner section (4 band models only)
Tuning range 65.0 - 74.0 MHz
Stereo Plus
AM tuner section
Tuning range
2 Band type:
Canadian model: 530 - 1,710 kHz
(with the interval set at 10 kHz)
531 - 1,710 kHz
(with the interval set at 9 kHz)
Other model: 531 - 1,602 kHz
(with the interval set at 9 kHz)
530 - 1,710 kHz
(with the interval set at 10 kHz)
3 Band/4 Band type:
European and Russian models:
MW: 531 - 1,602 kHz
(with the interval set at 9 kHz)
LW: 153 - 279 kHz
(with the interval set at 3 kHz)
– 2 –
TABLE OF CONTENTS
SECTION 1
SERVICING NOTES
1. SERVICING NOTES............................................... 3
2. GENERAL
Location of Controls ....................................................... 6
Setting the Time .............................................................. 7
3. DISASSEMBLY ......................................................... 8
4. TEST MODE.............................................................. 11
5. MECHANICAL ADJUSTMENTS....................... 13
6. ELECTRICAL ADJUSTMENTS
DECK Section ................................................................. 13
TUNER Section .............................................................. 16
CD Section ...................................................................... 18
7. DIAGRAMS.................................................................20
7-1. Block Diagram – TUNER Section
(AEP, UK, German models only) – ................................ 21
7-2. Block Diagram – TUNER Section
(East European, CIS models only) – .............................. 23
7-3. Block Diagram
– CD MECHANISM DECK Section – .......................... 25
7-4. Block Diagram – TAPE DECK Section – ...................... 27
7-5. Block Diagram – MAIN Section – ................................. 29
7-6. Block Diagram – DISPLAY/KEY CONTROL/
POWER SUPPLY Section – ......................................... 31
7-7. Schematic Diagram – TUNER Section
(AEP, UK, German models only) – ................................ 35
7-8. Printed Wiring Board – TUNER Section
(AEP, UK, German models only) – ................................ 37
7-9. Printed Wiring Board – TUNER Section
(East European, CIS models only) – .............................. 38
7-10. Schematic Diagram – TUNER Section
(East European, CIS models only) – .............................. 39
7-11. Printed Wiring Board – CD Section – ........................... 41
7-12. Schematic Diagram – CD Section – ............................... 43
7-13. Printed Wiring Boards – CD MOTOR Section – .......... 45
7-14. Schematic Diagram – CD MOTOR Section – .............. 47
7-15. Printed Wiring Board – TAPE DECK Section – ........... 49
7-16. Schematic Diagram – TAPE DECK Section –.............. 51
7-17. Printed Wiring Board – LEAF SW Section – ............... 53
7-18. Schematic Diagram – LEAF SW Section – .................. 53
7-19. Printed Wiring Board – MAIN Section –...................... 55
7-20. Schematic Diagram – MAIN Section (1/4) –............... 57
7-21. Schematic Diagram – MAIN Section (2/4) –................ 59
7-22. Schematic Diagram – MAIN Section (3/4) –................ 61
7-23. Schematic Diagram – MAIN Section (4/4) –................ 63
7-24. Printed Wiring Board – PANEL Section – .................... 65
7-25. Schematic Diagram – PANEL Section –....................... 67
7-26. Printed Wiring Board – CD-SW Section –.................... 69
7-27. Schematic Diagram – CD-SW Section – ...................... 69
7-28. Printed Wiring Board – HP Section – ........................... 71
7-29. Schematic Diagram – HP Section – .............................. 71
7-30. Printed Wiring Board – POWER AMP Section – ......... 72
7-31. Schematic Diagram – POWER AMP Section –............ 73
7-32. Printed Wiring Board
– TRANSFORMER Section – ........................................ 75
7-33. Schematic Diagram
– TRANSFORMER Section – ........................................ 76
7-34. IC Pin Function Description ........................................... 82
8. EXPLODED VIEWS ................................................ 87
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential 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. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
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.
CAUTION : INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL : USYNLIG LASERSTRÅLING VED ÅBNING NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE
FOR STRÅLING.
VORSICHT : UNSICHTBARE LASERSTRAHLUNG, WENN
ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG
ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.
VARO!: AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-
TIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.
VARNING : OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD
OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.
ADVERSEL : USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG
SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
VIGYAZAT!: A BURKOLAT NYITÁSAKOR LÁTHATATLAN LÉZERSU-
GÁRVESZÉLY
!
KERÜLJE A BESUGÁRZÁST!
9. ELECTRICAL PARTS LIST ............................... 96
– 3 –
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED
LINE WITH MARK ! 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 PUBLISHED BY SONY.
MODEL IDENTIFICATION
– Back Panel –
PART No.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQ UE !
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
MODEL PART No.
Canadian model 4-996-843-0π
Israel and Thai models 4-996-843-6π
E model 4-996-844-0π
Malaysia, Singapore and
South African models
GRX7: Saudi Arabia and Taiwan models 4-996-844-2π
Hong Kong model 4-996-844-3π
Australian model 4-996-844-4π
Mexican model 4-996-844-5π
Indonesian model 4-996-844-7π
GRX7J 4-996-844-8π
RX77S: UK model 4-996-845-0π
RX77S: East European and CIS model 4-996-845-1π
R700 4-996-845-2π
RX77: AEP and German model 4-996-845-3π
RX77: East European model 4-996-845-4π
4-996-844-1π
– 4 –
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.
1
Remove the Case.
3
Pull-out the disc tray.
2
Turn the cam to the
direction of arrow.
e
NOTE FOR INSTALLATION (ROTARY ENCODER)
BU cam
Section A
Groove
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.
Note:When attaching the Base unit, Insert th
section A into the groove of BU cam.
– 5 –
LOCATION OF CONTROLS
1 2 3 4
!∞
!§
!¶
!•
!ª
@º
@¡
@™
@£
@¢
SECTION 2
GENERAL
5
6
7
8
9
!º
!¡
!™
!£
!¢
1 I /u (Power) button
2 DISC 1 to 3 buttons and indicators
3 DISC SKIP/EX-CHANGE button
4 6 (CD) button
5 CD disc tray
6 CD ^ button and indicator
7 TUNER, BAND button
8 r REC button and indicator
9 P PAUSE button and indicator
!º HI-DUB button
!¡ CD SYNC button
!™ EFFECT button and indicator
(GRX7/GRX7J/RX77: Canadian models)
FILE SELECT button (AEP, UK, German, East
European, and CIS models)
!£ SURROUND button
!¢ KARAOKE PON/MPX button
!∞ DECK B 9 and ( buttons and indicators
!§ DECK A 9 and ( buttons and indicators
!¶ FUNCTION button
!• ECHO LEVEL knob (Saudi Arabia model)
!ª MIC LEVEL knob
@º MIX MIC jac
@¡ DISPLAY/DEMO button
@™ CLOCK/TIMER SET button
@£ TIMER SELECT button
@¢ p button
#¶
#•
#™
#£
#¢
#∞
#§
#ª
$º
$¡
@∞
$™ $£ $¢ $∞ $§ $¶ $•
@§
@¶
@•
@ª
#º
#¡
@∞ Fluorescent indicator tube
@§ ENTER/NEXT button and indicator
@¶ PTY button (AEP, UK, and German models)
@• GROOVE button and indicator
@ª VOLUME konb
#º PHONES jack
#¡ DBFB button
#™ Remote sensor
#£ P FILE MEMOR Y button (GRX7/GRX7J/RX77:
Canadian models)
#¢ GEQ CONTROL button (GRX7/GRX7J/RX77:
Canadian models)
#∞ FILE SELECT button (GRX7/GRX7J/RX77:
Canadian models)
#§ LOOP button
#¶ NON-STOP button and indicator
#• FLASH button
#ª EDIT, DIRECTION button
$º PLAY MODE, DOLBY NR button
$¡ REPEAT button
$™ § button (deck A)
$£ Tape deck A
$¢ –, 0 button and indicator
$∞ JOG dial
$§ +, ) button and indicator
$¶ Tape deck B
$• § button (deck B)
– 6 –
– 7 –
SECTION 3
)
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
6
CASE
2
screw
(CASE3 TP2) (3 × 12)
3
two screws
(CASE3 TP2) (3 × 8)
case
1
three screws
(BVTP3 × 8)
FRONT PANEL SECTION
4
loading panel
4
5
1
Turn the cam to the direction
of arrow
A
.
4
2
screw
(CASE3 TP2) (3 × 12)
3
two screws
(CASE3 TP2) (3 × 8
9
screw
(BVTP3
2
Pull-out the
disc tray.
×
10)
3
two claws
0
three screws
(BVTT3
A
5
wire (flat type)
(15 core) (33 cm)
(CN106)
9
screw
(BVTP3
8
connector
(CN109)
×
6)
×
10)
6
wire (flat type) (13 core)
(23 cm) (CN201)
7
wire (flat type)
(17 core) (CN107)
– 8 –
TAPE MECHANISM DECK SECTION (TCM-230AWR1/TCM-230PWR1)
1
Push the
cassette lids.
3
three screws
(BVTP3
×
8)
2
Open the
cassette lids.
4
two screws
(BVTP3
×
8 )
5
tape mechanism
deck section
(TCM-230AWR1/
TCM-230PWR1)
4
CD mechanism deck section
CDM38L-5BD29AL
CDM38LH-5BD29AL
3
two screws
(BVTP3
×
8)
2
wire (flat type) (19 core) (24 cm)
(CN105)
1
two connectors
(CN103, CN104)
CD MECHANISM DECK SECTION (CDM38L-5BD29AL /CDM38LH-5BD29AL)
Note: The CD mechanism deck will
fall if three screws are removed.
Support it by hand, then remove
three screws.
– 9 –
MAIN BOARD
)
Abbreviation
AUS : Australian
CND : Canadian
E2 : 120 V AC Area in E model
E3 : 240 V AC Area in E model
EA3 : Saudi Arabia
EA4 : Israel
EE : East European
G : German
HK : Hong Kong
IA : Indonesian
MX : Mexican
MY : Malaysia
SAF : South African
SP : Singapore
TH : Thai
TW : Taiwan
1
connector
(CN11)
4
two screws
(BVTT3
3
two screws
(BVTP3
GRX7/GRX7J
3
3
screw
(BVTP3
screw
(BVTP3
×
8)
CND
3
screw
(BVTP3
×
8)
5
connector
(CN101)
×
8)
GRX7/GRX7J/RX77: CND
7
connector
(CN110)
6
MAIN board
2
wire (flat type) (13 core) (14 cm)
(CN102) (CND, E2, EA4, TH,
MX, AUS)
wire (flat type) (15 core) (14 cm)
(CN102) (GRX7: E3, EA3, MY,
SP, IA, HK, TW, SAF/GRX7J/
R700/RX77: AEP, G, EE/RX77S
×
8)
×
6)
– 10 –
SECTION 4
TEST MODE
[MC Cold Reset]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Press three buttons p , [ENTER/NEXT], and I/u simulta-
neously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[CD Delivery Mode]
• This mode moves the pickup to the position durable to vibration. Use this mode when returning the set to the customer after
repair.
Procedure:
1. Press I/u button to turn the set ON.
2. Press [LOOP] button and I/u button simultaneously.
3. A message “LOCK” is displayed on the fluorescent indicator
tube, and the CD delivery mode is set.
[MC Hot Reset]
• This mode resets the set with the preset data kept stored in the
memory. The hot r eset mode functions same as if the power
cord is plugged in and out.
Procedure:
1. Press three buttons p , [ENTER/NEXT], and [DISC1] simul-
taneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[Sled Servo Mode]
• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.
Procedure:
1. Press
2. Select the function “CD”.
3. Press three buttons p , [ENTER/NEXT], and § simulta-
4. The Sled Servo mode is selected, if “CD” is blanking on the
5. With the CD in stop status, press ) + button to move the
6. To exit from this mode, perform as follows:
Note: • Always move the pickup to most inside track when exiting from
I/u button to turn the set ON.
neously.
fluorescent indicator tube.
pickup to outside track, or – 0 button to inside track.
1) Move the pickup to the most inside track.
2) Press three buttons in the same manner as step 2.
this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively , otherwise the gear can be
chipped.
[Change-over of AM Tuner Step between 9 kHz and
10 kHz]
• A step of AM channels can be changed ov er between 9 kHz and
10 kHz.
Procedure:
1. Press I/u button to turn the set ON.
2. Select the function “TUNER”, and press [TUNER/BAND]
button to select the BAND “AM”.
3. Press I/u button to turn the set OFF.
4. Press [ENTER/NEXT] and I/u buttons simultaneously, and
the display of fluorescent indicator tube changes to “AM 9 k
STEP” or “AM 10 k STEP”, and thus the channel step is
changed over.
[LED and Fluorescent Indicator Tube All Lit, Key Check
Mode]
Procedure:
1. Press three buttons p , [ENTER/NEXT], and [DISC2] simul-
taneously.
2. LEDs and fluorescent indicator tube are all turned on.
Press [DISC2] button, and the key check mode is activated.
3. In the key check mode, the fluorescent indicator tube displays
“K 1 J0 V0”. Each time a button is pressed, “K” value increases. However , once a button is pressed , it is no longer taken
into account.
“J” value increases like 1, 2, 3 ... if rotating [JOG] knob in
“+” direction, or it decreases like 0, 9, 8 ... if rotating in “–”
direction.
“V” value increases like 1, 2, 3 ... if rotating [VOLUME] knob
in “+” direction, or it decreases like 0, 9, 8 ... if rotating in
“–” direction.
4. To exit from this mode, press three buttons in the same man-
ner as step 1, or disconnect the power cord.
– 11 –
[Aging Mode]
This mode can be used for operation check of CD section and tape
deck section.
• If an error occurred:
The aging operation stops and display status.
• If no error occurs:
The aging operation continues repeatedly.
1. Operating Method of Aging Mode
1) Set disc in DISC1 tray.
2) Load the tapes recording use into the decks A and B respec-
tively.
3) Press three buttons p , [ENTER/NEXT],
and [DISCSKIP/EX-CHANGE] simultaneously.
4) The aging mode is activated, if a CD roulette mark on the fluo-
rescent indicator tube is blinking.
5) To exit from the aging mode, press I/u button to turn the set
OFF.
2. Operation Sequence
• Dur ing the aging mode in the following sequence to below.
• Starting the CD section aging for function set “CD”, starting
the TAPE section (deck A) aging for function set “TAPE A” or
“TAPE B”. (Set another function is no work.)
CD (disc1) (12 minutes) → Deck A
↑↓(About 13 minutes
Deck B 20 seconds
maximum)
3. Aging mode in CD section
1) Display state
• No error occurs
display
1 –
[*][*]
@ @
4. Aging mode in Ta pe Deck section
1) Display state
• No error occurs
Display action now
• Error occurred
Display action last time
NO. Display action Action contents Final timing
1 TAPE A AG-1 Rewind the TAPE A The top of tape
2 TAPE A AG-2 FWD play the TAPE A 3 minutes playing
3 TAPE A AG-3 F.F. the TAPE A First either 20 minutes
or the end of tape
4 TAPE A AG-4 REV play the TAPE A 3 minutes playing
5 TAPE A AG-5 Rewind the TAPE A The top of tape
6 TAPE B AG-1 Rewind the TAPE B The top of tape
7 TAPE B AG-2 FWD play the TAPE B 3 minutes playing
8 TAPE B AG-3 F.F. the TAPE B First either 20 minutes
or the end of tape
9 TAPE B AG-4 REV play the TAPE B 3 minutes playing
10 TAPE B AG-5 Rewind the TAPE B The top of tape
2) Operation during Aging Mode
In the aging mode, the program is executed in the following sequence.
(1) Rewind is executed up to the top of tape.
(2) A tape on FWD side is played for 3 minutes.
(3) FF is executed up to either made for 20 minutes or the end of
tape.
(4) A tape is reversed, and the tape on REV side is played for 3
minutes.
(5) Rewind is executed up to the top of tape.
(6) Steps 1 through 5 are executed for the other deck.
(7) Change to CD section aging.
Note:
: a letter “CD” and the remainder time (minute) alternately. (re-
[*][*]
mainder time start from 12 minute)
@@: track number in access.
• Error occurred
NO. Display Main factor
1 NO DISC ERR Not set disc in DISC1
2 FOCUS1 ERR Focus does not work
3 FOCUS2 ERR Focus does not work after the disc rotate as usual
4 GFS ERR GFS error
5 FBIAS ERR Error in to the focus bias adjustment
6 SENSOR ERR Disc sensor sens DISC1 is no disc
7 TABLE ERR CD tray lotate does not work
8 TRAY ERR Tray (include BD) move does not work
2) Operation during aging Mode
In the aging mode, the program is executed in the following sequence.
(1) The disc tray turns to select a disc1.
(2) A disc is chucked.
(3) TOC of disc is read.
(4) The pickup accesses to the track 1, and playing 2 seconds.
(5) The pickup accesses to the last track, and playing 2 seconds.
(6) Steps 1 through 5 are repeated about 12 minutes.
(7) Change to deck section aging.
– 12 –
SECTION 5
MECHANICAL ADJUSTMENTS
SECTION 6
ELECTRICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
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
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.03 – 0.08 oz • inch)
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.03 – 0.08 oz • inch)
71 to 143 g • cm
(0.99 – 1.99 oz • inch)
100 g or more
(3.53 oz or more)
100 g or more
(3.53 oz or more)
DECK SECTION
0 dB=0.775 V
1. Demagnetize the record/playback head with a head demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjust.
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 RCH.
7. Switches and controls should be set as follows unless otherwise specified.
• Test Tape
Tape Signal Used for
P-4-A100 10 kHz, –10 dB Azimuth Adjustment
WS-48B 3 kHz, 0 dB Tape Speed Adjustment
P-4-L300 315 Hz, 0 dB Level Adjustment
Record/Playback Head Azimuth Adjustment
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback
test tape
P-4-A100
(10 kHz, –10 dB)
set
main board
CN301
3
(L-CH)
Pin
Pin
1
(R-CH)
main board
CN301
Pin
2
(GND)
level meter
+
–
– 13 –
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 1dB of peak.
Output
level
within
1dB
L-CH
peak
R-CH
peak
within
1dB
Screw
position
L-CH
peak
Screw
position
R-CH
peak
Tape Speed Adjustment DECK B
Note: Start the Tape Speed adjustment as below after setting to the test
mode.
In the test mode, the tape speed is high during pressing the
[HI-DUB] button.
Procedure:
1. Turn the power switch on.
2. Press the p button, [ENTER/NEXT] button and [DISC3] button
simultaneously.
(The “VOLUME” on the fluorescent indicator tube will blink
while in the test mode.)
To exit from the test mode, press the I/u button.
Mode: Playback
test tape
WS-48B
(3 kHz, 0 dB)
frequency counter
3. Mode: Playback
test tape
P-4-A100
(10 kHz, –10 dB)
L-CH
MAIN
board
CN301
set
R-CH
waveform of oscilloscope
in phase 45°90°135°180
pin
L
R
pin
good
3
pin
1
2
oscilloscope
V
wrong
H
°
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location:Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
3
: L-CH)
1
: R-CH)
+
–
set
main board
CN301 (Pin
(Pin
1. Insert the WS-48B into the deck B.
2. Press the · button on the deck B.
3. Press the [HI-DUB] button in playback mode.
Then at HIGH speed mode.
4. Adjust RV1001 on the LEAF SW board do that frequency
counter reads 6,000 ± 180 Hz.
5. Press the [HI-DUB] button.
Then back to NORMAL speed mode.
6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 ± 90 Hz.
Adjustment Location: LEAF SW board
Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)
(WS-48B)
Playback level Adjustment DECK A DECK B
Procedure:
Mode: Playback
test tape
P-4-L300
(315 Hz, 0 dB)
set
level meter
+
–
forward
reverse
main board
CN301 (Pin
(Pin
3
1
: L-CH)
: R-CH)
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:
CN301 PB level: 301.5 to 338.3 mV (–8.2 to –7.2 dB) level
difference between the channels: within ±0.5 dB
Adjustment Location: AUDIO board
– 14 –
REC Bias Adjustment DECK B
+
–
set
recorded
portion
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
set
MD/VIDEO (AUDIO) IN
315 Hz, 50 mV (–23.8 dB)
blank tape
CS-123
600
Ω
attenuator
AF OSC
REC LEVEL
13
RV301
L
RV351
R
CN106
CN301
CN107
RV401
RV301
RV341
RV311
RV411
IC602
CN601
LR
RL
RV441
PB LEVEL
– DECK B –
REC BIAS
LR
PB LEVEL
– DECK A –
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjust-
ment, when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback is
set.
This “REC memory mode” is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO.
(If do not operation of stopped from recording complete, and press
– 0 button then rewind to recording start position.)
1. Press [FUNCTION] button to select VIDEO. (This ste p is not
necessary if the above test mode has already been set.)
2. Insert a tape into deck B.
3. After press [REC] button, press P button, then recording
r
start.
4. Mode: Record
MD/VIDEO (AUDIO) IN
1) 315 Hz
2) 10 kHz
AF OSC
attenuator
50 mV (–23.8 dB)
600
Ω
set
blank tape
CN-123
4. Mode: Record
5. Mode: Playback
6. Confirm playback the signal recorded in step 3 become adjustable level as follows.
If these levels do not adjustable level, adjustment the RV301
(L-CH) and R V351 (R-CH) on the MAIN board to repeat steps
4 and 5.
Adjustable level:
CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
5. Mode: Playback
6. Confirm playback the signal recorded in step 3 become adjustable level as follows.
If these levels do not adjustable level, adjustment the RV341
(L-CH) and RV441 (R-CH) on the AUDIO board to repeat
steps 4 and 5.
Adjustable level: Playback output of 315 Hz to playback output
Adjustment Location: AUDIO board
REC Level Adjustment
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjust-
ment, when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback is
set.
This “REC memory mode” is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO.
(If do not operation of stopped from recording complete, and press
– 0 button then rewind to recording start position.)
1. Press [FUNCTION] button to select VIDEO. (This ste p is not
necessary if the above test mode has already been set.)
2. Insert a tape into deck B.
3. After press [REC] button, press P button, then recording
start.
recorded
portion
r
set
CN301 (Pin
(Pin
3
1
of 10 kHz: ±1.0 dB
DECK B
level meter
+
–
: L-CH)
: R-CH)
[MAIN BOARD] (Component Side)
[AUDIO BOARD] (Component Side)
[LEAF SW BOARD] (Component Side)
TAPE SPEED
(NORMAL) (HIGH)
RV1002
RV1001
– 15 –
CN1001
TUNER SECTION 0 dB=1 µV
(AEP, German, UK, East European, CIS models only)
Note: As a front-end (FE1) is difficult to repair if faulty, replace it with
new one.
AM Section Adjustment
Note: FM Tuned Level Adjustment should be performed after this AM
Tuned Level Adjustment.
Setting:
loop antenna
(Supplied accessories)
µ
V/m) =SSG output level dB (µV/m) –26 dB.
AM RF SSG
30% amplitude
modulation by
400 Hz signal
loop antenna
60 cm
Field strength dB (
AM Tuned Level Adjustment
Band: MW
Procedure:
1. Set the output of SSG so that the input level of the set becomes 55 dB.
2. Tune the set to 999 kHz or 1,050 kHz.
3. Adjust R V41 to the point (moment) when the TUNED indicator will change from going off to going on.
Adjustment Location : TCB board
FM Section Adjustment
Note: This adjustment should be performed after the AM Tuned Level
Adjustment due to the same adjustment element.
Setting:
set
AM ANTENNA
terminal (TM1)
Adjustment Location: TCB board
Adjustment Location:
[TCB BOARD] (Component Side)
TM1
IFT41
RV4
AM T uned
Level
Adjustment
FM RF stereo signal
generator
Ω
coaxial
75
set
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kH, 75 kHz
deviation (100%)
FM ANTENNA terminal
(TM1) (75
Ω
open)
FM Tuned Level Adjustment
Band: FM
Procedure:
1. Supply a 25 dBµ 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. If the TUNED indicator does not light, adjust RV42 to the
point (moment) when the TUNED indicator will change from
going off to going on.
CN1
IC41
RV42
FM T uned
Level
Adjustment
– 16 –
FM Polar Adjustment (East European, CIS models only)
)
l
k
frequency
counter
+
–
+
–
level meter
Q1701
Q1702
Q1703
TP1701
(FILTER)
TP1702
(VCO)
Connection 1:
FM RF SSG
Ω
coaxial
75
set
FM ANTENNA termina
(75 Ω)
Carrier frequency: 69 MHz
Output level : 1mV (60dB
Modulation : AUDIO 1 kHZ, 10kHz deviation
µ
) (at 75 Ω open)
Connection 2:
AF OSC
FM RF SSG
75 Ω coaxial
set
Audio 31.25 kHz
Carrier frequency: 69 MHz
Output level : 1mV (60 dBµ) (at 75 Ω open)
Modulation : AUDIO 31.25 kHZ, 10 kHz deviation
external
modulation
terminal
(EXTERNAL MODULATION
FM ANTENNA terminal
(75 Ω)
Procedure :
1. Set the modulation of FM RF SSG to AUDIO 1 kHz, 10 kHz
deviation according to “Connection 1”.
2. Tune the set to 69 MHZ.
3. Adjust the RV1702 so that the reading of frequency counter
connected to TP1702 becomes within 31.25 kHz ± 0.05 kHz.
(VCO Adjustment)
4. Then record the reading of the level meter connected to TP1701
5. Set the modulation of FM RF SSG to AUDIO 31.25 kHz, 10
kHz deviation according to “Connection 2”.
6. Tune the set to 69 MHz.
7. Set the CT1701 to be mechanical center.
8. Adjust the L1701 so that the reading of the level meter connected to TP1701 become 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)
Adjustment Location :
East European, CIS:
[TCB BOARD] (Component Side)
TM1
IFT41
IC41
CN1
RV41
AM T uned Level
Adjustment
RV42
FM T uned Level
Adjustment
L1701
Sub Carrier Pea
Adjustment
RV1701
Sub Carrier Level
Adjustment
CT1701
Sub Carrier Peak
Adjustment
RV1702
VCO Adjustment
[TCB BOARD] (Conductor Side)
– 17 –
CD SECTION
V
+
–
BD board
TP (TEO)
TP (VC)
oscilloscope
)
Note:
1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 MΩ impedance.
4. Clean the object lens b y an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
E-F Balance (Traverse) check
(Without remote commander)
S Curve Check
oscilloscope
BD board
TP (FEO)
TP (VC)
+
–
Procedure:
1. Connect oscilloscope to test point TP (FEO).
2. Connect between test point TP (FOK) and GND by lead wire.
3. Turn Power switch on.
4. Put disc (YEDS-18) in and turned 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 3±1
Vp-p.
S-curve waveform
symmetry
A
B
within 3
±
1 Vp-p
6. After check, remove the lead wire connected in step 2.
Note: • Try to measure several times to make sure than 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
TP (RF)
TP (VC)
+
–
Procedure:
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turned Power switch on.
3. 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 waveform.
Procedure:
1. Connect oscilloscope to test point TP (TEO) on BD board.
2. Turned Power switch on. Press [FUNCTION] button to select
CD.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the p button, [ENTER/NEXT] button and ^ button simultaneously several times to fluorescent indicator tube
display “SHUFFLE” is blink. (The sledding servo is turned
OFF.)
5. Check the level B of the oscilloscope’s waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following:
A
× 100 = less than ±7 (%)
B
Traverse waveform
0 V
level: 500
±
100 mVp-p
Center of the waveform
B
A (DC
voltage)
symmetry
6. Press the p button, [ENTER/NEXT] b utton and ^ button
simultaneously several times to fluorescent indicator tube display “SHUFFLE” is OFF. (The sleding servo is turned ON.)
Confirm the C (DC voltage) is almost equal to the A (DC v oltage) is step 5.
Traverse waveform
0 V
Sled servo ONSled servo OFF
C (DC
voltage
• FR signal
VOLT/DIV: 200 m
TIME/DIV: 500 ns
level:
±
1.3
0.3 Vp-p
– 18 –
Adjustment Location:
[BD BOARD] (Conductor Side)
CNU101
GND
TEO
IC103
CNU102
FEO
RF
IC101
VC
FOK
IC
I02
– 19 –
• Circuit Boards Location
SECTION 7
DIAGRAMS
CD-SW board
PANEL board
TRANSFORMER board
ENCAPSULATED COMPONENT
(GRX7/GRX7J: Saudi Arabia/RX77: Canadian)
TCB board
(AEP, UK, German, East European, CIS)
TUNER
(Tourist)
MAIN board
CONNECTOR board
HP board
SENSOR board
POWER AMP board
MOTOR (TURN) board
BD board
MOTOR (SLIDE) board
AUDIO board
LEAF SW board
– 20 –
7-1. BLOCK DIAGRAM – TUNER Section (AEP, UK, German models only) –
HCD-GRX7/GRX7J/R700/RX77/RX77S
FM 75Ω
COAXIAL
AM
TM1
ANTENNA
1
ST +10V
ANT IN
B+ SWITCH
6
+B
FM FRONT-END
VT
5
Q13
MW
SWITCH
Q5
FM CIRCUIT B+
IF OUT
FE1
7
6
5
3
2
Q14
LW SWITCH
10.7MHz
MW/LW FRONT-END
26 252423
SWITCH
CF1
Q12
MW
FE2
22
FM IF AMP
Q1, 2
21
20
Q11
MW
SWITCH
12
13
14
15
16
17
CF2
10.7MHz
FM IF AMP
Q3, 4
Q9
LW SWITCH
RV42
FM TUNED
LEVEL
28
29
27
CF3
10.7MHz
REG
AM-OSC
AM-RF IN
FM SD
30
VCO-STOP
AM/FM
14 15 13
FM-IN
1
AM RF AMP/MIX/OSC,
AM-MIX
AM-SD
12
ADJ
AM SD
10
IF-BUFF MUTE
D41
FM/AM IF AMP,
FM/AM DET, MPX
IC41
AM IF
2
IFT41
RV41
AM TUNED
LEVEL
X42
450kHz
X21
4.5MHz
X41
10.7MHz
FM DET-OUT
AM
AM
4
DET
IF
OUT
STEREO
TUNED
FM DET
9
• SIGNAL PATH
: FM
: AM (MW/LW)
AMP
MPX
OUT L
23
24
7
6
22
IN
5
RDS SIGNAL BUFFER
IC1751
STEREO
TUNED
MUTE
OUT R
7
21
20
RDS DECODER
MUX
4
OSCI
LPF41
L.P.F.
R-CH
IC1752
13
X1751
4.332MHz
DATA
INT
OSCO
14
19
IN L
2
16
AMP
OUT L
RDS DATA
RDS INT
17
ST-L
I
(Page 29)
K
(Page 29)
10
FM
05
9 11
17
VT1
MW
FM/AM PLL
IC21
MW
14
AM OSC
7
FM
12
2
FM/AM IF
VCO STOP
8
IF REQ
– 21 –
1
XIN
24
XOUT
CE
DI
CL
DO
ST-CE
3
ST-DOUT
4
ST-CLK
5
ST-DIN
6
STEREO, TUNED, MUTE,
ST-CE, ST-DOUT, ST-CLK, ST-DIN
J
(Page 29)
– 22 –
HCD-GRX7/GRX7J/R700/RX77/RX77S
7-2. BLOCK DIAGRAM – TUNER Section (East European, CIS models only) –
FM 75Ω
COAXIAL
AM
TM1
ANTENNA
8
ST +10V
ANT IN
4
B+ SWITCH
5
+B
FM FRONT-END
VT
Q13
MW
SWITCH
Q5
FM CIRCUIT B+
IF OUT
FE1
1
6
5
3
2
Q14
LW SWITCH
10.7MHz
MW/LW FRONT-END
26 252423
SWITCH
CF1
Q12
MW
FE2
22
FM IF AMP
Q1 – 4
21
20
Q11
MW
SWITCH
12
13
14
15
16
17
CF3
10.7MHz
Q9
LW SWITCH
RV42
FM TUNED
LEVEL
1
28
29
27
FM-IN
REG
AM-OSC
AM-RF IN
FM SD
30
VCO-STOP
AM/FM
14 15 13
AM-MIX
AM-SD
ADJ
AM
SD
IF-BUFF MUTE
FM/AM IF AMP,
AM RF AMP/MIX/OSC,
FM/AM DET, MPX
IC41
AM IF
2
IFT41
12
RV41
AM TUNED
LEVEL
10
X42
450kHz
10.7MHz
D41
D42
X41
FM DET-OUT
AM
AM
4
DET
IF
OUT
STEREO
TUNED
FM DET
9
D43
• SIGNAL PATH
: FM
: AM (MW/LW)
AMP
MPX
OUT L
23
24
7
6
22
IN
CT1701, L1701, TP1701
SUB CARRIER
PEAK
L1701
TP1701
RV1701
SUB CARRIER
LEVEL
STEREO
TUNED
MUTE
OUT R
CT1701
21
20
POLAR DECODER
IC1701
IN
2
SUB IN
3
SUB IN
20
VCO STOP
MON
18
TP1702
TP1702, RV1702
L OUT
R OUT
ST IND
VCO
7
6
9
10
VCO
17
RV1702
LPF41
L.P.F.
POLAR /PILOT SWITCH
IC1702
12
13
5
3
CA
11
9
D1701
SWITCHING
Q1702
19
IN L
14
4
D1702
SWITCHING
Q1703
OUT L
R-CH
AMP
17
SWITCHING
Q1701
D1703
ST-L
I
(Page 29)
X21
4.5MHz
10
FM
05
9 11
17
VT1
MW
FM/AM PLL
IC21
MW
14
AM OSC
12
2
7
FM
FM/AM IF
VCO STOP
8
IF REQ
1
24
XIN
XOUT
13
FM LOW
CE
DI
CL
DO
ST-CE
3
ST-DOUT
4
ST-CLK
5
ST-DIN
6
– 23 –
D1704
– 24 –
STEREO, TUNED, MUTE,
ST-CE, ST-DOUT, ST-CLK, ST-DIN
J
(Page 29)
7-3. BLOCK DIAGRAM – CD MECHANISM DECK Section –
HCD-GRX7/GRX7J/R700/RX77/RX77S
DETECTOR
A
D
B
C
F
E
OPTICAL PICK-UP
(KSS-213D/Q-NP)
LASER DIODE
PD
4
5
1
2
I-V AMP
10
6
DIGITAL SIGNAL PROCESSOR,
CLV SERVO PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
PD1 I-V AMP
PD1
38
RF
+
FOCUS/TRACKING
IC101 (1/2)
F
E
AMP
LD
LD
AMPPDAMP
SUMMING
AMP
RF AMP,
SERVO
I-V
PD2 I-V AMP
PD2
39
41
42
AUTOMATIC
POWER CONTROL
LD
Q101
36
FOCUS
ERROR
AMP
TRACKING
ERROR
AMP
PD
37
RFO
33
RFI
32
FOCUS OK
COMPARATOR
MIRR
AMP
DEFECT
AMP
FEO
FE BIAS
TEO
FOK
DATA
CLK
XLT
LOCK
XRST
SENS1
C.OUT
SENS2
FEO
TAO
27
22
20
21
19
23
25
24
26
6
13
73
FOCUS OK
AMP
TTL
IIL
1
40
45
FEI
2
TEI
47
TTL
IIL
IIL DATA REGISTER
IIL
TTL
FOCUS PHASE
COMPENSATION
TRACKING PHASE
COMPENSATION
IC103
RF
ASYI
ASYO
FOK
DATO
CLKO
XLTO
SEIN
CNIN
ASYMMETRY
CORRECTION
XRST
100
57
XRST
SQ-DATA-IN
CD-DATA
SERVO AUTO SEQUENCER
SYSTEM CONTROLLER
SENS
CD-CLK
XLT
SCOR
44
46
47
23
15
17
16
13
14
SQ-CLK (D-OUT ON/OFF)
SENS2
DIGITAL CLV
MON
26
IC501 (1/3)
34
36
74
47
48
58
18
FILTER
39
42
FILO
CLTV
DIGITAL PLL
XROF
MDS29LOCK64SQSO
MDP
28
27
PCO
4038
FILI
8 7
DEMODULATOR
SUB-CODE
PROCESSOR
CPU INTERFACE
SENS
SQCK
CLOK
DATA
91012
EFM
CORRECTOR
XLAT
SCOR
SBSO
EXCK
77
117576
ON : When the optical pick-up
INTERNAL BUS
ERROR
CKO
SPOD
6
21
S101
(LIMIT)
is inner position.
D/A
16K
RAM
TIMING
LOGIC
XTAI
89
16.9344MHz
INTERFACE
DIGITAL
90
X101
PCMD
52
BCK
54
LRCK
50
C2PO
63
RFCK
62
WDCK
49
DOUT
OUT
EMPH
WFCK
GTOP
CLOCK
GENERATOR
XTAO70C4M
GFS
PCMDI
53
55
51
71
72
61
74
58
BCKI
LRCKI
SERIAL
INPUT
INTERFACE
EMPHI
73
OVER
SAMPLING
DIGITAL
FILTER
NOISE
SHAPER
PWM &
INTEGRATOR
AOUT1
AOUT2
84 95
85
94
AIN1
AIN2
BUFFER
LOUT2
LOUT1
86
93
R-CH
CD-L
A
(Page 29)
OPTICAL
TRANSCEIVER
IC381
IC381
CD DIGITAL
OUT
OPTICAL
LEVEL SHIFT
Q701
4
ROTARY
2
ENCODER
S811
3
DISC TRAY SLIDE MOTOR DRIVE
FIN
10
RIN
2
TBL-SENS
ENC1
ENC2
ENC3
LOAD-IN
75
76
81
80
79
78
63
64
DISC-SENS
9
2-AXIS
DEVICE
(FOCUS)
(TRACKING)
05
M102
M
(SLED)
M101
(SPINDLE)
M
OUT4A
16
OUT4B
15
OUT3A
18
OUT3B
17
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
OUT2A
11
OUT2B
12
OUT1A
13
OUT1B
14
MUTE
TRACKING
COIL DRIVE
FOCUS
COIL DRIVE
IC102
SLED
MOTOR DRIVE
SPINDLE
MOTOR DRIVE
IN4A
IN3B
IN2A
IN1B
27
OP
26
6
3
24
16
OUT
SLO
SLED SERVO
BUFFER
SLED
AMP
IC101 (2/2)
OP+,
OP–
SLP
22, 23
14
OUT-OPEN
LOAD-OUT
DISC SENSOR
IC703
DISC TRAY SENSOR
IC702
S801
(OPEN/CLOSE DET)
CLOSE
OPEN
IC801
OUT1
MOTOR
OUT2
DRIVE
7
4
M
(DISC TRAY SLIDE)
M801
• SIGNAL PATH
: CD PLAY
TBL-L
TBL-R
DISC TRAY TURN MOTOR DRIVE
60
61
IC701
MOTOR
DRIVE
OUT1
OUT2
7
2
M
(DISC TRAY TURN)
M701
IN1
3
IN2
6
: DIGITAL OUT
– 25 – – 26 –
HCD-GRX7/GRX7J/R700/RX77/RX77S
7-4. BLOCK DIAGRAM – TAPE DECK Section –
HRP1
(PLAYBACK)
L-CH
R-CH R-CH
HRP2 (1/2)
(RECORD/PLAYBACK)
L-CH
R-CH R-CH
REC/PB SWITCHING
1
3
R-CH
R-CH
PB EQ AMP
(DECK A)
IC611
PB EQ AMP
(DECK B)
IC601
IC602
RV311
PB LEVEL (L)
(DECK A)
RV301
PB LEVEL (L)
(DECK B)
4
DECK PROCESS
DECK A/B SELECT, PB/REC EQ AMP,
DOLBY NR AMP, ALC, AMS
AIN (L)
48
BIN (L)
46
BIAS (N)
33
BIAS (C)
32
31
S1004
(DECK A 120/70)
S1008
(DECK B 120/70)
BIAS (M)
CONTROL
B NORM/CROM
A 120/70
19
IC301
BIAS
CIRCUIT
ALC ON/OFF
1516182022 23242517
NORM/HIGH
PB A/B
70
120
R-CH
NR ON/OFF
BIAS ON/OFF
RM ON/OFF
L.P.F.
BUFFER
AMS
CIRCUIT
REC/PB/PASS
LM ON/OFF
+
28
27
26
MAOUT
MSIN
MSOUT
RIN (L)
43
ALC (L)
44
DOLBY PASS
ALC
ROUT (L)
35 34
DOLBY NR
AMP
CIRCUIT
ALC
IN (L)
REC OUT (L)
39
RV301
REC LEVEL (L)
(DECK B)
EQ IN (L)
38
REC
EQ AMP
PB OUT (L)
EQ OUT
• SIGNAL PATH
: PLAYBACK (DECK A)
40
(L)
36
PB-L
REC-L
B
(Page 29)
C
(Page 30)
: PLAYBACK (DECK B)
: RECORD
RV441
REC BIAS (R)
(DECK B)
HRP2 (2/2)
(ERASE)
R-CH
2
RV341
REC BIAS (L)
(DECK B)
BIAS OSC
T621
BIAS OSC
Q621, 622
REC BIAS
SWITCH
Q623
05
C331, L331
BIAS
TRAP
B+
(A+7V)
97
TC-RELAY
A-PLAY-SW
95 96
S1001
(DECK A PLAY)
9994939290 898887
BIAS
PB-A/B
EQ-H/N
REC-MUTE
ALC-ON/OFF
S1002
(DECK B PLAY)
NR-ON/OFF
B-PLAY-SW
S1003
(DECK A HALF)
TC-MUTE
R/P-PASS
31
AMS-IN
A-HALF
98
ROTATION
DETECT SENSOR
(DECK A)
IC1001
S1006
(DECK B HALF)
S1009
(DECK B REC)
26
A-SHUT
B-HALF
28
ROTATION
DETECT SENSOR
(DECK B)
IC1002
27
B-SHUT
S1005
(DECK A REC)
SL1
TRIGGER PLUNGER
DECK A
TRIGGER
PLUNGER DRIVE
(DECK A)
Q333, 334
84
SYSTEM CONTROLLER
IC501 (2/3)
A-TRG
SL2
TRIGGER PLUNGER
DECK B
TRIGGER
PLUNGER DRIVE
(DECK B)
Q331, 332
83
B-TRG
Q335
82
CAP-M-H/L
RV1001
TAPE SPEED
(HIGH)
CAPM-CNT1P
CAPM-CNT2P
CAPM-CNT1M
CAPM-CNT2M
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
17
77
85
86
RV1002
TAPE SPEED
(NORMAL)
CAPSTAN
MOTOR DRIVE
Q336 – 339
CAPSTAN
MOTOR DRIVE
Q340 – 343
M
M1
(CAPSTAN)
– 27 –
– 28 –
7-5. BLOCK DIAGRAM – MAIN Section –
(Saudi Arabia model)
RV751
ECHO
J751
MIX MIC
(Page 26)
A
(Page 28)
B
J101 (1/2)
MD/VIDEO (AUDIO) IN
L
R
(AEP, UK, German, East European, CIS models)
(Page 22, 24)
I
ANTENNA
FM 75Ω
AM
GRX7/GRX7J/
RX77: Canadian
J
(Page 22, 24)
(AEP, UK, German, East European, CIS models)
LEVEL
CD-L
PB-L
R-CH
ST-L
FM/AM TUNER UNIT
FM ANT
FM ANT
AM ANT
ST-MUTE
STEREO
AM ANT
TUNED
ST-DIN
ST-DOUT
ST-CLK
ST-CE
ST-L
ST-R
ST-MUTE
ST-DOUT
MIC AMP
IC750 (1/2)
STEREO
TUNED
ST-DIN
ST-CLK
ST-CE
DIGITAL ECHO
IC751
R-CH
RV750
MIC LEVEL
68
67
69
66
IN B2
IN C2
IN A2
IN D2
MIC AMP
IC750 (2/2)
INPUT
SELECT
R-CH
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
IC101
CONTROL
SOUND
CIRCUIT
KEY IN2
KEY IN1
60 5
(Page 31)
(Page 31)
(Page 32)
(Page 32)
KEY OUT
75
HCD-GRX7/GRX7J/R700/RX77/RX77S
• SIGNAL PATH
DRIVE
Q401, 402
RY401
PROTECTOR
: TUNER (FM/AM)
: MIC INPUT
M
D404
Q435, 436
RESET
M401
(FAN MOTOR)
J421
PHONES
+
L
–
+
R
–
TM402
SURROUND
SPEAKER
IMPEDANCE
USE 16Ω
(Canadian model)
TM401
+
L
–
+
R
–
GRX7/GRX7J/
RX77: Canadian
TM401
SPEAKER
IMPEDANCE
USE 8 – 16Ω
AEP, UK, German, East
European, CIS models
TM401
SPEAKER
IMPEDANCE
USE 6 – 16Ω
E
(Page 31)
: CD PLAY
: TAPE PLAY
: RECORD
REC-L
R-CH
R-CH
LINE AMP
BASS BOOST
CONTROL
CIRCUIT
BB B2,
BB A2
38, 39
IC191
FEED BACK SWITCH
BUF
OUT2
Q112
MUTING
Q191
36
MUTING
Q113
R-CH
2
MIC IN
+
+
REC
A2
+
CPU
INTERFACE
DATA
CLOCK
33 32
34
40
VOL OUT2
COMMAND
LATCH
58
GRAPHIC
EQUALIZER
CONTROL
R-CH
CIRCUIT
REC
57
B2
F OUT2
42
VOL
IN2
VOLUME
41
CONTROL
+
SPEANA
MIXING AMP
IC102
SPEANA
D
DATA, CLK
F
POWER
G
CD-POWER
H
CLK
DATA
DBFB CONTROL
R-CH
SWITCH
Q111
R-CH
X501
5MHz
X502
32.768kHz
(Page 28)
C
J101 (2/2)
L
MD/VIDEO
(AUDIO) OUT
R
(GRX7/GRX7J/RX77: Canadian)
J191
SUPER WOOFER
POWER AMP
IC801
STANDBY
SWITCH
Q575
D141
+
R-CH
TH831
(GRX7/GRX7J/RX77: Canadian)
MUTING CONTROL
SWITCH
Q571, 572
OVER LOAD
DETECT
Q801
+
R-CH
+
R-CH
TEMPERATURE
DETECT SWITCH
Q831, 832
R-CH
D843
DC DETECT
SWITCH
Q433, 434
(GRX7/GRX7J/RX77: Canadian)
FAN MOTOR
D403
-1
-2
RELAY
DRIVE
Q431
OVER LOAD
DETECT SWITCH
Q432, 437
+5V
RESET SIGNAL
GENERATOR
IC502
RESET
SWITCH
Q501
RDS DATA,
RDS INT
K
(Page 22)
(AEP, UK, German models)
05
22
21
RDS-DATA
RDS-INT
68
65
ST-CE
66
ST-DIN
ST-CLK
67
69
ST-DOUT
70
TUNED
STEREO
72
ST-MUTE
– 29 –
SYSTEM CONTROLLER
IC501 (3/3)
46 5
CD-POWER
POWER
5655
IIC-CLK
IIC-DATA
52 51
3
M62442-CLK
M62442-DATA
M62442-LATCH
2
DBFB-H/L
10
11
X2
X1
14
13
XT2
100
XT1
STK-MUTE
1
16
LINE-MUTE
AC-CUT
15
RESET
6
F-RELAY
– 30 –
HCD-GRX7/GRX7J/R700/RX77/RX77S
g
7-6. BLOCK DIAGRAM – DISPLAY/KEY CONTROL/POWER SUPPLY Section –
DATA, CLK
F
(Page 29)
RESET
E
(Page 30)
BAND-PASS FILTER
IC603
SPEANA
D
(Page 29)
S611 – 613; GRX7/GRX7J/RX77: Canadian only,
S655; AEP, UK, German models only
4
LINE IN
S601
(JOG DIAL)
= ↔ +
DJ MIX
S602
VOLUME
S604 – 625, 631 – 642,
REMOTE CONTROL
F01
F02
F03
F04
L+R
S655 – 659
RECEIVER
IC602
ROTARY
ENCODER
S601
ROTARY
ENCODER
S602
FLUORESCENT INDICATOR TUBE DRIVE,
LED DRIVE, KEY CONTROL
IC601
DATA
CLK
17
16
15
14
13
24
23
10
34
35
36
37
32
26 – 29
33
21
22
19
20
SDA
SCL
RESET
SPEANA-1
SPEANA-2
SPEANA-3
SPEANA-4
L+R
SIRCS
JOG-A
JOG-B
VOL-A
VOL-B
KEY-0 – KEY-3
SEG1 – SEG24
54 – 69, 72 – 70, 77 – 73
53
GR13
42 – 52
GR2 – GR12
41
GR1
L.SEL
25
LED12 – LED15
79, 3 – 6, 15 – 18
LED1, LED5 – LED8,
11, 12
LED9, LED10
GRID DRIVE
Q621
GRID DRIVE
Q620
D+5V
Q603
Q604, 607 – 610,
Q613 – 615, 618
FLUORESCENT
INDICATOR TUBE
FL601
B+ SWITCH
Q601, 602
LED DRIVE
(D620, Q607; GRX7/GRX7J/RX77: Canadian only)
D610, 612, 620 – 625,
D631 – 633, 651, 652
D613 – 618
CD MECHANISM DECK
SECTION B+
AUDIO D+5V
D+5V
SYSTEM CONTROLLER
(IC501) B+
(GRX7/GRX7J/RX77: Canadian)
FAN MOTOR B–
(FM/AM TUNER CIRCUIT B+)
D405 – 407
+10V
B+
SWITCH
Q907, 908
B+
SWITCH
Q905, 906
D507
D501, 502
REGULATOR
CONTROL SWITCH
Q903
TC, PANEL, AUDIO
D914
+7V
(CD M+7V)
+7V
–7V
CAPSTAN MOTOR DRIVE CIRCUIT,
TRIGGER PLUNGER DRIVE CIRCUIT B+
+10V
REGULATOR
Q909
POWER
CD-POWER
+5V
REGULATOR
IC902
+7V
REGULATOR
IC901
+7V
REGULATOR
Q901, 902, 913
–7V
REGULATOR
Q914, 951, 952
+12V
REGULATOR
IC903
(Page 29)
G
(Page 29)
H
RECT
D901 – 904
RECT
D907, 908
POWER TRANSFORMER
T11
X-OUT
X-IN
9
8
X601
05
8MHz
–30V
FL DRIVER (IC601)
FLUORESCENT INDICATOR TUBE
TO
(FL601)
– 31 –
REGULATOR
POWER AMP
(IC801)
–30V
Q910
VF1
VF2
B+
B–
– 32 –
RECT
D909, 910
RECT
D800
Except E, Saudi Arabia, Malaysia, Singapore,
Indonesia, Hong Kong, Taiwan, South African models
AC IN
VOLTAGE
SELECT SWITCH
S11
S11
VOLTAGE
SELECTOR
E, Saudi Arabia, Malaysia, Singapore, Indonesia,
Kong, Taiwan, South African models
Hon
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
¢
•
• C : panel designation.
Note:
The components identified by mark ! or dotted
line with mark ! are critical for safety.
Replace only with part
number specified.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
• V oltages are taken with a VOM (Input impedance 10 MΩ).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Abbreviation
: internal component.
under no-signal (detuned) conditions.
Voltage var iations may be noted due to normal produc-
tion tolerances.
Voltage var iations may be noted due to normal produc-
tion tolerances.
F : FM
f : AM
E : PB (DECK A)
d : PB (DECK B)
G : REC (DECK B)
J : CD
c : digital out
N : Mic in
AUS : Australian model.
CND : Canadian model.
E2 : 120 V AC Area in E model.
E3 : 240 V AC Area in E model.
EA3 : Saudi Arabia model.
EA4 : Israel model.
EE : East European model.
G : German model.
HK : Hong Kong model.
IA : Indonesian model.
JE : Tourist model.
MX : Mexican model.
MY : Malaysia model.
SAF : South African model.
SP : Singapore model.
TH : Thai model.
TW : Taiwan model.
4
W or less unless otherwise
Note:
Les composants identifiés par
une marque ! sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• p : parts mounted on the conductor side.
®
•
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
• Indication of transistor.
These are omitted.
B
: Through hole.
Q
CE
C
Q
B
E
These are omitted.
• Wavef orms
– TUNER Section –
(AEP, UK, German)
1 IC21 @¢ (XOUT)
4.5 MHz
2 IC1752 !¢ (OEC0)
4.332 MHz
– TUNER Section –
(East European, CIS)
1 IC21 @¢ (XOUT)
4.5 MHz
– CD Section –
1 IC101 #£ (RF O) (PLAY MODE)
4.2 Vp-p
2 Vp-p
4.2 Vp-p
1.3 Vp-p
HCD-GRX7/GRX7J/R700/RX77/RX77S
3 IC101 $¶ (TEI) (PLAY MODE)
4 IC103 @¶ (MDP)
7.8 µs
5 IC103 ^º (XPCK)
230 µs
6 IC103 ^™ (RFCK)
135 µs
7 IC103 &¢ (WFCK)
0.2 Vp-p
2.5 Vp-p
5 Vp-p
5 Vp-p
8 IC103 *ª (XTAI)
2.6 Vp-p
16.9344 MHz
– MAIN Section –
1 IC501 !¡ (X1)
4.4 Vp-p
200 ns
2 IC501 !¢ (XT1)
2.2 Vp-p
30.6 µs
– PANEL Section –
3 IC601 9 (X-IN)
3.6 Vp-p
– 33 –
2 IC101 2 (FEI) (PLAY MODE)
126 ns
5 Vp-p
0.5 Vp-p
135 µs
– 34 –
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