Sony HCDRX-77 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.

Remove the Case.

Pull-out the disc tray.

Turn the cam to the direction of arrow.

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

6 7

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.

CASE

screw (CASE3 TP2) (3 × 12)

two screws (CASE3 TP2) (3 × 8)

case

three screws (BVTP3 × 8)

FRONT PANEL SECTION

loading panel

Turn the cam to the direction of arrow

screw (CASE3 TP2) (3 × 12)

two screws (CASE3 TP2) (3 × 8

screw (BVTP3

Pull-out the disc tray.

10)

two claws

three screws (BVTT3

wire (flat type) (15 core) (33 cm) (CN106)

screw (BVTP3

connector (CN109)

10)

wire (flat type) (13 core) (23 cm) (CN201)

wire (flat type) (17 core) (CN107)

– 8 –

TAPE MECHANISM DECK SECTION (TCM-230AWR1/TCM-230PWR1)

Push the cassette lids.

three screws (BVTP3

Open the cassette lids.

two screws (BVTP3

8 )

tape mechanism deck section (TCM-230AWR1/ TCM-230PWR1)

CD mechanism deck section CDM38L-5BD29AL CDM38LH-5BD29AL

 

two screws (BVTP3

wire (flat type) (19 core) (24 cm) (CN105)

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

connector (CN11)

two screws (BVTT3

two screws (BVTP3

GRX7/GRX7J

screw (BVTP3

CND

screw (BVTP3

connector (CN101)

GRX7/GRX7J/RX77: CND

connector (CN110)

MAIN board

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

– 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 [DISC1] 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 [DISC2] simul-

taneously.

2. LEDs and fluorescent indicator tube are all turned on.

Press [DISC2] 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 [DISCSKIP/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-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

(L-CH)

Pin Pin

(R-CH)

main board CN301 Pin

(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 [DISC3] 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

good

oscilloscope

wrong

4. After the adjustments, apply suitable locking compound to the pats adjusted.

Adjustment Location:Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

: L-CH)

: 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

: L-CH)

(Pin

: 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

RV301

RV351

CN106

CN301

CN107

       

RV401

RV301

RV341

RV311

RV411

IC602

CN601



RV441

PB LEVEL

– DECK B –

REC BIAS



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

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:

– 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

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)

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

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)

)

frequency counter

–

+ –

level meter

Q1701

Q1702

Q1703

TP1701 (FILTER)

TP1702 (VCO)

Connection 1:

FM RF SSG

Ω

coaxial

set

FM ANTENNA termina (75 Ω)

Carrier frequency: 69 MHz Output level : 1mV (60dB Modulation : AUDIO 1 kHZ, 10kHz deviation

) (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

–

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

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:

× 100 = less than ±7 (%)

Traverse waveform

0 V

level: 500

100 mVp-p

Center of the waveform

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

IC101

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

TM1

ANTENNA

ST +10V

ANT IN

B+ SWITCH

FM FRONT-END

Q13 MW

SWITCH

FM CIRCUIT B+

IF OUT

FE1

Q14

LW SWITCH

10.7MHz

MW/LW FRONT-END

26 252423

SWITCH

CF1

Q12 MW

FE2

FM IF AMP

Q1, 2

Q11 MW

SWITCH

14 15

CF2

10.7MHz FM IF AMP

Q3, 4

LW SWITCH

RV42

FM TUNED

LEVEL

CF3

10.7MHz

REG

AM-OSC

AM-RF IN

FM SD

VCO-STOP

AM/FM

14 15 13

FM-IN

AM RF AMP/MIX/OSC,

AM-MIX

AM-SD

ADJ

AM SD

IF-BUFF MUTE

D41

FM/AM IF AMP,

FM/AM DET, MPX

IC41

AM IF

IFT41

RV41

AM TUNED

LEVEL

X42

450kHz

X21

4.5MHz

X41

10.7MHz

FM DET-OUT

DET

OUT

STEREO

TUNED

FM DET

• SIGNAL PATH : FM

: AM (MW/LW)

AMP

MPX

OUT L

7 6

RDS SIGNAL BUFFER

IC1751

STEREO TUNED

MUTE

OUT R

RDS DECODER

MUX

OSCI

LPF41

L.P.F.

R-CH

IC1752

X1751

4.332MHz

DATA

INT

OSCO

IN L

AMP

OUT L

RDS DATA

RDS INT

ST-L

(Page 29)

9 11

VT1

FM/AM PLL

IC21

AM OSC

FM/AM IF

VCO STOP

IF REQ

– 21 –

XIN

XOUT

ST-CE

ST-DOUT

ST-CLK

ST-DIN

STEREO, TUNED, MUTE,

ST-CE, ST-DOUT, ST-CLK, ST-DIN

(Page 29)

– 22 –

HCD-GRX7/GRX7J/R700/RX77/RX77S

7-2. BLOCK DIAGRAM – TUNER Section (East European, CIS models only) –

FM 75Ω

COAXIAL

TM1

ANTENNA

ST +10V

ANT IN

B+ SWITCH

FM FRONT-END

Q13 MW

SWITCH

FM CIRCUIT B+

IF OUT

FE1

Q14

LW SWITCH

10.7MHz

MW/LW FRONT-END

26 252423

SWITCH

CF1

Q12 MW

FE2

FM IF AMP

Q1 – 4

Q11 MW

SWITCH

14 15

CF3

10.7MHz

LW SWITCH

RV42

FM TUNED

LEVEL

FM-IN

REG

AM-OSC

AM-RF IN

FM SD

VCO-STOP

AM/FM

14 15 13

AM-MIX

AM-SD

ADJ

IF-BUFF MUTE

FM/AM IF AMP,

AM RF AMP/MIX/OSC,

FM/AM DET, MPX

IC41

AM IF

IFT41

RV41

AM TUNED

LEVEL

X42

450kHz

10.7MHz

D41

D42

X41

FM DET-OUT

DET

OUT

STEREO

TUNED

FM DET

D43

• SIGNAL PATH : FM

: AM (MW/LW)

AMP

MPX

OUT L

7 6

CT1701, L1701, TP1701

SUB CARRIER

PEAK

L1701

TP1701

RV1701

SUB CARRIER

LEVEL

STEREO TUNED

MUTE

OUT R

CT1701

POLAR DECODER

IC1701

SUB IN

VCO STOP

MON

TP1702

TP1702, RV1702

L OUT

R OUT

ST IND

VCO

RV1702

LPF41

L.P.F.

POLAR /PILOT SWITCH

IC1702

12 13

5 3

D1701

SWITCHING

Q1702

IN L

D1702

SWITCHING

Q1703

OUT L

R-CH

AMP

SWITCHING

Q1701

D1703

ST-L

(Page 29)

X21

4.5MHz

9 11

VT1

FM/AM PLL

IC21

AM OSC

FM/AM IF

VCO STOP

IF REQ

XIN

XOUT

FM LOW

ST-CE

ST-DOUT

ST-CLK

ST-DIN

– 23 –

D1704

– 24 –

STEREO, TUNED, MUTE,

ST-CE, ST-DOUT, ST-CLK, ST-DIN

(Page 29)

7-3. BLOCK DIAGRAM – CD MECHANISM DECK Section –

HCD-GRX7/GRX7J/R700/RX77/RX77S

DETECTOR

OPTICAL PICK-UP

(KSS-213D/Q-NP)

LASER DIODE

I-V AMP

DIGITAL SIGNAL PROCESSOR,

CLV SERVO PROCESSOR,

DIGITAL FILTER, D/A CONVERTER

PD1 I-V AMP

PD1

FOCUS/TRACKING

IC101 (1/2)

F E

AMP

AMPPDAMP

SUMMING

AMP

RF AMP,

SERVO

I-V

PD2 I-V AMP

PD2

41 42

AUTOMATIC

POWER CONTROL

Q101

FOCUS ERROR

AMP

TRACKING

ERROR

AMP

RFO

RFI

FOCUS OK

COMPARATOR

MIRR

AMP

DEFECT

AMP

FEO

FE BIAS

TEO

FOK

DATA

CLK

XLT LOCK XRST

SENS1

C.OUT

SENS2

FEO

TAO

22 20 21 19 23

25 24 26

FOCUS OK

AMP

TTL

IIL

FEI

TEI

TTL

IIL

IIL DATA REGISTER

IIL

TTL

FOCUS PHASE

COMPENSATION

TRACKING PHASE

COMPENSATION

IC103

ASYI ASYO

FOK

DATO CLKO XLTO

SEIN CNIN

ASYMMETRY CORRECTION

XRST

100

XRST

SQ-DATA-IN

CD-DATA

SERVO AUTO SEQUENCER

SYSTEM CONTROLLER

SENS

CD-CLK

XLT

SCOR

46 47

15 17 16

13 14

SQ-CLK (D-OUT ON/OFF)

SENS2

DIGITAL CLV

MON

IC501 (1/3)

34 36 74

48 58

FILTER

FILO

CLTV

DIGITAL PLL

XROF

MDS29LOCK64SQSO

MDP

PCO

4038

FILI

8 7

DEMODULATOR

SUB-CODE

PROCESSOR

CPU INTERFACE

SENS

SQCK

CLOK

DATA

91012

EFM

CORRECTOR

XLAT

SCOR

SBSO

EXCK

117576

ON : When the optical pick-up

INTERNAL BUS

ERROR

CKO

SPOD

S101

(LIMIT)

is inner position.

D/A

16K

RAM

TIMING

LOGIC

XTAI 89

16.9344MHz

INTERFACE

DIGITAL

X101

PCMD

BCK

LRCK

C2PO

RFCK

WDCK

DOUT

OUT

EMPH

WFCK

GTOP

CLOCK

GENERATOR

XTAO70C4M

GFS

PCMDI

53 55 51

71 72

61 74 58

BCKI LRCKI

SERIAL

INPUT

INTERFACE

EMPHI

OVER

SAMPLING

DIGITAL

FILTER

NOISE

SHAPER

PWM &

INTEGRATOR

AOUT1

AOUT2

84 95

AIN1

AIN2

BUFFER

LOUT2

LOUT1 86

R-CH

CD-L

(Page 29)

OPTICAL

TRANSCEIVER

IC381

CD DIGITAL

OUT

OPTICAL

LEVEL SHIFT

Q701

ROTARY

ENCODER

S811

DISC TRAY SLIDE MOTOR DRIVE

FIN

RIN

TBL-SENS

ENC1 ENC2 ENC3

LOAD-IN

DISC-SENS

2-AXIS DEVICE

(FOCUS)

(TRACKING)

M102

(SLED)

M101

(SPINDLE)

OUT4A

OUT4B

OUT3A

OUT3B

FOCUS/TRACKING COIL DRIVE,

SPINDLE/SLED MOTOR DRIVE

OUT2A

OUT2B

OUT1A

OUT1B

MUTE

TRACKING

COIL DRIVE

FOCUS

COIL DRIVE

IC102

SLED

MOTOR DRIVE

SPINDLE

MOTOR DRIVE

IN4A

IN3B

IN2A

IN1B

OUT

SLO

SLED SERVO

BUFFER

SLED

AMP

IC101 (2/2)

OP+,

OP–

SLP

22, 23

OUT-OPEN

LOAD-OUT

DISC SENSOR

IC703

DISC TRAY SENSOR

IC702

S801

(OPEN/CLOSE DET)

OPEN

IC801

OUT1

MOTOR

OUT2

DRIVE

7 4

(DISC TRAY SLIDE)

M801

• SIGNAL PATH : CD PLAY

TBL-L

TBL-R

DISC TRAY TURN MOTOR DRIVE

IC701

MOTOR

DRIVE

OUT1 OUT2

7 2

(DISC TRAY TURN)

M701

IN1

IN2

: 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

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)

DECK PROCESS

DECK A/B SELECT, PB/REC EQ AMP,

DOLBY NR AMP, ALC, AMS

AIN (L)

BIN (L)

BIAS (N)

BIAS (C)

32 31

S1004

(DECK A 120/70)

S1008

(DECK B 120/70)

BIAS (M)

CONTROL

B NORM/CROM

A 120/70

IC301

BIAS

CIRCUIT

ALC ON/OFF

1516182022 23242517

NORM/HIGH

PB A/B

120

R-CH

NR ON/OFF

BIAS ON/OFF

RM ON/OFF

L.P.F.

BUFFER

AMS

CIRCUIT

REC/PB/PASS

LM ON/OFF

MAOUT

MSIN

MSOUT

RIN (L)

ALC (L)

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)

REC

EQ AMP

PB OUT (L)

EQ OUT

• SIGNAL PATH : PLAYBACK (DECK A)

(L)

PB-L

REC-L

(Page 29)

(Page 30)

: PLAYBACK (DECK B) : RECORD

RV441

REC BIAS (R)

(DECK B)

HRP2 (2/2)

(ERASE)

R-CH

RV341

REC BIAS (L)

(DECK B)

BIAS OSC

T621

BIAS OSC Q621, 622

REC BIAS

SWITCH

Q623

C331, L331

BIAS

TRAP

B+

(A+7V)

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

AMS-IN

A-HALF

ROTATION

DETECT SENSOR

(DECK A)

IC1001

S1006

(DECK B HALF)

S1009

(DECK B REC)

A-SHUT

B-HALF

ROTATION

DETECT SENSOR

(DECK B)

IC1002

B-SHUT

S1005

(DECK A REC)

SL1

TRIGGER PLUNGER

DECK A

TRIGGER

PLUNGER DRIVE

(DECK A)

Q333, 334

SYSTEM CONTROLLER

IC501 (2/3)

A-TRG

SL2

TRIGGER PLUNGER

DECK B

TRIGGER

PLUNGER DRIVE

(DECK B)

Q331, 332

B-TRG

Q335

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

(CAPSTAN)

– 27 –

– 28 –

7-5. BLOCK DIAGRAM – MAIN Section –

(Saudi Arabia model)

RV751

ECHO

J751

MIX MIC

(Page 26)

(Page 28)

J101 (1/2)

MD/VIDEO (AUDIO) IN

(AEP, UK, German, East European, CIS models)

(Page 22, 24)

ANTENNA

FM 75Ω

GRX7/GRX7J/ RX77: Canadian

(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 32)

KEY OUT

HCD-GRX7/GRX7J/R700/RX77/RX77S

• SIGNAL PATH

DRIVE

Q401, 402

RY401

PROTECTOR

: TUNER (FM/AM) : MIC INPUT

D404

Q435, 436

RESET

M401

(FAN MOTOR)

J421

PHONES

– +

–

TM402

SURROUND

SPEAKER

IMPEDANCE

USE 16Ω

(Canadian model)

TM401

– +

–

GRX7/GRX7J/

RX77: Canadian

TM401

SPEAKER

IMPEDANCE

USE 8 – 16Ω

AEP, UK, German, East

European, CIS models

TM401

SPEAKER

IMPEDANCE

USE 6 – 16Ω

(Page 31)

: CD PLAY : TAPE PLAY : RECORD

REC-L

R-CH

LINE AMP

BASS BOOST

CONTROL

CIRCUIT

BB B2,

BB A2

38, 39

IC191

FEED BACK SWITCH

BUF

OUT2

Q112

MUTING

Q191

MUTING

Q113

R-CH

MIC IN

REC

CPU

INTERFACE

DATA

CLOCK

33 32

VOL OUT2

COMMAND

LATCH

GRAPHIC

EQUALIZER

CONTROL

R-CH

CIRCUIT

REC

F OUT2

VOL IN2

VOLUME

CONTROL

SPEANA

MIXING AMP

IC102

SPEANA

DATA, CLK

POWER

CD-POWER

CLK

DATA

DBFB CONTROL

R-CH

SWITCH

Q111

R-CH

X501

5MHz

X502

32.768kHz

(Page 28)

J101 (2/2)

MD/VIDEO

(AUDIO) OUT

(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

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

(Page 22)

(AEP, UK, German models)

22 21

RDS-DATA

RDS-INT

ST-CE

ST-DIN

ST-CLK

ST-DOUT

TUNED

STEREO

ST-MUTE

– 29 –

SYSTEM CONTROLLER

IC501 (3/3)

46 5

CD-POWER

POWER

5655

IIC-CLK

IIC-DATA

52 51

M62442-CLK

M62442-DATA

M62442-LATCH

DBFB-H/L

XT2

100

XT1

STK-MUTE

LINE-MUTE

AC-CUT

RESET

F-RELAY

– 30 –

HCD-GRX7/GRX7J/R700/RX77/RX77S

7-6. BLOCK DIAGRAM – DISPLAY/KEY CONTROL/POWER SUPPLY Section –

DATA, CLK

(Page 29)

RESET

(Page 30)

BAND-PASS FILTER

IC603

SPEANA

(Page 29)

S611 – 613; GRX7/GRX7J/RX77: Canadian only, S655; AEP, UK, German models only

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

16 15 14

24 23

34 35 36 37

26 – 29

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

GR13

42 – 52

GR2 – GR12

GR1

L.SEL

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)

RECT

D901 – 904

RECT

D907, 908

POWER TRANSFORMER

T11

X-OUT

X-IN

X601

8MHz

–30V

FL DRIVER (IC601)

FLUORESCENT INDICATOR TUBE

(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.

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.

: Through hole.

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

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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