Aiwa CXJV-77 Service manual

CX-JV77

SERVICE MANUAL

Ver 1.0 2004.06

• CX-JV77 is the amplifier, CD play er , tape deck
and tuner section in JAX-V77.

CD CD Mechanism Type CDM74-K4BD49
Section Base Unit Name BU-K4BD49

Tape deck Model Name Using Similar Mechanism NEW
Section T ape Transport Mechanism Type CWM43FR36

E Model

Model Name Using Similar Mechanism NEW

Optical Pick-up Block Name KSM-213DHAP

Main unit

Amplifier section

Front speaker
The following measured at AC 120, 127, 220, 240 V
50/60 Hz
DIN power output (rated): 120 + 120 watts

Continuous RMS power output (reference):

Inputs
VIDEO/SAT IN (phono jacks):

MIC (phone jack): sensitivity 1 mV,

Outputs
PHONES (stereo mini ja ck):

VIDEO OUT (phono jack):

VIDEO/SAT OUT (phono jacks):

SPEAKER: accepts impedance of 6 to

SURROUND SPEAKER:

(6 ohms at 1 kHz, DIN)

150 + 150 watts
(6 ohms at 1 kHz, 10%
THD)

voltage 450/250 mV,
impedance 47 kilohms

impedance 10 kilohms

accepts headphones of
8ohms or more

max. output level 1Vp-p,
unbalanced, Sync
negative, load impedance
75 ohms

impedance 1 kilohm

16 ohms
accepts impedance of
24 ohms

SPECIFICATIONS

CD player section

System Compact disc and digital

Laser Semiconductor laser

Frequency response 2 Hz – 20 kHz (±0. 5 dB )
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
Video color system format

Tape deck section

Recording system 4-track 2-channel, stereo
Frequency response 50 – 13,000 Hz (±3 dB ),

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz

Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz

audio system

(λ=770 – 810 nm)
Emission duration:
continuous

NTSC, PAL

using Sony TYP E I
cassettes

(50-kHz step)

AM tuner section

Tuning range
2 Band type:
Saudi Arabian models: 531 – 1,602 kHz

Other models: 530 – 1,710 kHz

3 Band type:
Middle Eastern models:
MW: 530 – 1,710 kHz

SW: 5.95 – 17.90 MHz

Antenna AM loop antenna
Antenna terminals External ante nna terminal
Intermediate frequency 450 kHz

(with the tuning interval
set at 9 kHz)

(with the tuning interval
set at 10 kHz)
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)

(with the tuning interval
set at 10 kHz)
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)

(with the tuning interval
set at 5 kHz)

– Continued on next page –

9-877-887-01

2004F05-1
© 2004.06

COMPACT DISC DECK RECEIVER

Sony Corporation

Home Audio Company
Published by Sony Engineering Corporation

CX-JV77

General

Power requirements
Saudi Arabian model: 120 – 127/220 or

Other models: 120 V, 220 V or

Power consumption

Dimensions (w/h/d) incl. projecting parts and controls
Amplifier/Tuner/Tape/CD section:

Mass

Design and specifications are subject to change
without notice

230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector

230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector

155 watts

Approx. 280 × 325 ×
425 mm
Approx. 11.0 kg

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. This
marking is located on the
rear exterior.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 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.

2

TABLE OF CONTENTS

CX-JV77

1. SERVICING NOTES ................................................ 4

2. GENERAL

Location of Controls........................................................ 7

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 9

3-2. Case (Side-L/R) ............................................................... 10

3-3. Case (Top) ....................................................................... 10

3-4. Tray Panel........................................................................ 11

3-5. CD Mechanism Deck (CDM74-K4BD49) ...................... 11

3-6. Front Panel Block ............................................................ 12

3-7. Back Panel Section .......................................................... 12

3-8. MAIN Board.................................................................... 13

3-9. Tape Mechanism Deck (CWM43FR36).......................... 13

3-10. Table Assy ....................................................................... 14

3-11. MOTOR (TB) Board ....................................................... 14

3-12. MOTOR (LD) Board ....................................................... 15

3-13. Base Unit (BU-K4BD49) ................................................ 15

3-14. BD49 Board..................................................................... 16

4. TEST MODE.............................................................. 17

5. ELECTRICAL ADJUSTMENTS

CD Section ...................................................................... 21

VIDEO Section................................................................ 22

7. EXPLODED VIEWS

7-1. Case Section .................................................................... 62

7-2. Tape Mechanism Deck Section ....................................... 63

7-3. Cassette Box Section ....................................................... 64

7-4. Front Panel Section ......................................................... 65

7-5. Back Panel Section .......................................................... 66

7-6. Chassis Section ................................................................ 67

7-7. CD Mechanism Deck Section-1 (CDM74-K4BD49) ..... 68

7-8. CD Mechanism Deck Section-2 (CDM74-K4BD49) ..... 69

7-9. CD Mechanism Deck Section-3 (CDM74-K4BD49) ..... 70

7-10. Base Unit Section (BU-K4BD49) ................................... 71

8. ELECTRICAL PARTS LIST................................ 72

6. DIAGRAMS

6-1. Block Diagram – CD SERVO Section – ........................ 23

6-2. Block Diagram – AUDIO/VIDEO CD Section – ........... 24

6-3. Block Diagram – MAIN Section – ................................. 25

6-4. Block Diagram

– PANEL/POWER SUPPLY Section – ........................... 26

6-5. Printed Wiring Board – BD49 Board – .......................... 28

6-6. Schematic Diagram – BD49 Board – ............................. 29

6-7. Printed Wiring Boards – CHANGER Section –............. 30

6-8. Schematic Diagram – CHANGER Section – ................. 31

6-9. Schematic Diagram – VMP43GY Board (1/2) –............ 32

6-10. Schematic Diagram – VMP43GY Board (2/2) –............ 33

6-11. Printed Wiring Board – VMP43GY Board –.................. 34

6-12. Printed Wiring Boards

– VCD CONNECT, VIDEO OUT Boards – ................... 35

6-13. Schematic Diagram

– VCD CONNECT, VIDEO OUT Boards – ................... 35

6-14. Schematic Diagram – MAIN Section (1/4) – ................. 36

6-15. Schematic Diagram – MAIN Section (2/4) – ................. 37

6-16. Schematic Diagram – MAIN Section (3/4) – ................. 38

6-17. Schematic Diagram – MAIN Section (4/4) – ................. 39

6-18. Printed Wiring Boards – MAIN Section – ..................... 40

6-19. Printed Wiring Board –PANEL Section – ...................... 41

6-20. Schematic Diagram – PANEL Section (1/2) – ............... 42

6-21. Schematic Diagram – PANEL Section (2/2) – ............... 43

6-22. Printed Wiring Board – POWER AMP Section – .......... 44

6-23. Schematic Diagram – POWER AMP Section –............. 45

6-24. Printed Wiring Boards – TRANS Section – ................... 46

6-25. Schematic Diagram – TRANS Section – ....................... 47

3

CX-JV77

SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
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 pick­up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead­free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 ˚C higher

than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

RELEASING THE DISC TRAY LOCK

The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.

Releasing Procedure :

While pressing the x key, press the Z key for 5 seconds. The
message “UNLOCKED” is displayed and the tray is unlocked.

4

HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.

1

Remove the case (side-L).

2

Turn the loading gear
in the direction of arrow

A

A

.

3

Pull-out the disc tray.

CX-JV77

SERVICE POSITION
– CD MECHANISM DECK –

CD mechanism deck

stand

VCD CONNECT board

5

CX-JV77

– FRONT PANEL SECTION –

MAIN board

PANEL board

front panel section

– POWER BOARD –

SUB TRANS board

TRANS board

tape mechanism deck

front panel section

POWER board

MAIN board

6

78

• LOCATION OF CONTROLS

Main unit

ALPHABETICAL ORDER

A – N O – Z

ALBUM + wl
ALBUM – wl
BASS control 5
CD qk
CD SYNC qf
Deck A q;
Deck B e;
DISC 1 – 3 wf
DISC SKIP/EX-CHANGE wg

Disc tray wd
DISPLAY qj
Display window 4
ECHO LEVEL qa
ENTER 2
i-Bass qg
MIC jack ea
MIC LEVEL ea
MIDDLE control 5

Operation Dial (AMS/TUNING)

P FILE 6
PHONES jack qd
PLAY MODE 7

PRESET EQ 3
REC P AUSE/START 9

Remote sensor ws
SURROUND 8
TA P E A/B w;
TREBLE control 5
TUNER/BAND ql
TUNING MODE 7
VIDEO/SAT wa
VOLUM E control wj

qh

SECTION 2

GENERAL

BUTTON DESCRIPTIO

?/1 (power) 1

Z PUSH (deck A) (eject) qs
Z (eject) wh
PUSH Z (deck B) (eject) wk
m (rewind) wl
x (stop) wl
hH (play) wl
X (pause) wl
M (fast forward) wl

CX-JV77

This section is extracted from
instruction manual.

NS

qj
qh

qg
qf

qd
qs

qa
q;
9

1

+

–

2

4

3

5 6 ws

+–+–+–

qk ql w; wa

+

–

+–+–+–

wd

wf
wg
wh

wj

wk
wl
e;
ea

7

CX-JV77

Remote control

ALPHABETICAL ORDER

A – M

ALBUM +/– qa
CD wa
CLEAR qj
CLOCK/TIMER SELECT wh

CLOCK/TIMER SET wh
DISC SKIP q;

DISPLAY 3
ENTER qs
EQ qh
FM MODE 2
FUNCTION 4
KARAOKE/MPX qg

N – Z

NEXT ql
Number buttons w;
ON SCREEN 6
PLAY MODE wf
PREV ql
REPEAT 2
SELECT 9
SLEEP wg
SPECIAL MENU 7
TAPE ws
TUNER BAND 5
TUNER MEMORY wd
TUNING MODE wf
VOLUME +/– qf

BUTTON DESCRIPTIONS

?/1 (power) 1
m/M (rewind/fast forward)
N (play) 9
X (pause) 9
x (stop) 9

KEY CONTROL
RETURN O qk
+/– ql (tuning)
./> (go back/go forward)

#/2

qd

8

ql

Setting the clock

Use buttons on the remote for the operation.

1

Press ?/1 to turn on the system.

2

Press CLOCK/TIMER SET.

3

Press . or > repeatedly to set the
hour.

4

Press ENTER.

5

Press . or > repeatedly to set the
minute.

6

Press ENTER.

The clock starts wor ki ng.

To adjust the clock

1

Press CLOCK/TIMER SET.

2

Press . or > repeatedly to select
“CLOCK SET”, then press ENTER.

3

Do the same procedures as step 3 to 6
above.

Notes

•The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.

•You cannot set the clock in Power Saving Mode.

wh
wg
wf
wd
ws
wa

w;

ql

qk
qj
qh
qg

IONS

1
2
3
4
5

6
7
8

9
q;

qa
qs
qd

qf

8

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

Note 1: The process described in can be performed in any order.
Note 2: Without completing the process described in , the next process can not be performed.

SET

3-2. CASE

(SIDE-L/R)
(Page 10)

CX-JV77

SECTION 3

DISASSEMBLY

3-3. CASE (TOP)

(Page 10)

3-5. CD MECHANISM DECK

(CDM74-K4BD49)
(Page 11)

3-6. FRONT PANEL

BLOCK
(Page 12)

3-9. TAPE

MECHANISM
DECK
(CWM43FR36)
(Page 13)

3-4. TRAY PANEL

3-7. BACK PANEL

3-8. MAIN BOARD

(Page 11)

SECTION
(Page 12)

(Page 13)

3-10. TABLE ASSY

(Page 14)

3-11. MOTOR (TB)

BOARD
(Page 14)

3-12. MOTOR (LD)

BOARD
(Page 15)

3-13. BASE UNIT

(BU-K4BD49)
(Page 15)

3-14. BD49 BOARD

(Page 16)

9

CX-JV77

Note: Follow the disassembly procedure in the numerical order given.

3-2. CASE (SIDE-L/R)

1

two screws
(case 3 TP2)

2

screw
(case 3 TP2)

3

two screws
(BVTP3

×

10)

7

case (side-R)

3-3. CASE (TOP)

4

case (side-L)

2

case (top)

5

three screws
(case 3 TP2)

1

two screws
(BVTP3 × 10)

6

two screws
(BVTP3 × 10)

10

3-4. TRAY PANEL

)

1

Turn the loading gear
in the direction of arrow A.

four claws

3

Remove the tray panel
in the direction of arrow C.

CX-JV77

A

3-5. CD MECHANISM DECK

(CDM74-K4BD49)

6

connector
(CN301)

C

B

2

7

CD mechanism deck (CDM74-K4BD49)

Pull-out the tray in the direction
of arrow B.

2

5

wire (flat type) (11 core)
(CN882)

screw
(BVTP3

×

10)

4

1

screw
(BVTP3 × 10)

6

two connectors
(CN701, 883)

3

three screws

×

(BVTP3

10

11

CX-JV77

)

3-6. FRONT PANEL BLOCK

6

front panel block

1

wire (flat type) (29 core) (CN302)

2

connector
(CN103)

3

screw
(BVTP3

×

8)

4

two harnesses

2

connector
(CN112)

2

connector (CN324)

3-7. BACK PANEL SECTION

8

SUB TRANS board

7

two screws
(BVTP3

×

10)

2

connector
(CN308)

1

wire (flat type) (11 core) (CN101)

5

three screws
(BVTP3

×

4

duct cover

8)

2

connector
(CN309)

9

back panel section

3

two screws
(BVTP3

×

10)

5

three screws
(BVTP3

×

10

12

6

two screws
(BVTP3

×

10)

3-8. MAIN BOARD

k

1

connector
(CN907)

4

3

connector
(CN307)

CX-JV77

MAIN board

3-9. TAPE MECHANISM DECK

(CWM43FR36)

2

two screws
(BVTP3

×

8)

1

six screws
(M2.6)

2

tape mechanism dec
(CWM43FR36)

13

CX-JV77

)

3-10. TABLE ASSY

two claws

5

A

2

Pull-out the table assy.

6

table assy

3-11. MOTOR (TB) BOARD

1

screw
(PTPWH M2.6)

2

table (loading)

1

Turn the loading gear
in the direction of arrow

3

belt (table)

4

hook

3

wire (flat type) (5 core
(CN702)

A

.

14

4

connector
(CN731)

6

5

two screws
(BTTP M2.6)

MOTOR (TB) board

3-12. MOTOR (LD) BOARD

4

MOTOR (LD) board

3

two screws
(BTTP M2.6)

CX-JV77

3-13. BASE UNIT (BU-K4BD49)

1

belt (loading)

2

connector
(CN704)

9

base unit (BU-K4BD49)

5

4

three coil springs
(insulator)

3

three stoppers (BU)

three insulators

2

three screws
(BTTP M2.6)

8

insulator

7

coil spring
(insulator)

6

floating screw
(PTPWHM2.6)

1

wire (flat type) (29 core)
(CN101)

15

CX-JV77

)

3-14. BD49 BOARD

4

BD49 board

2

wire (flat type) (16 core
(CN102)

1

Remove four solders.

3

screw (2.6 × 8)

16

SECTION 4

TEST MODE

CX-JV77

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 the I/1 button to turn the power ON.

2. Press three buttons of x , [P FILE] and [DISC 1] simultane-
ously.

3. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.

AM TUNING INTERVAL CHANGE-OVER

A step of AM tuning interval can be changed over between 9 kHz
and 10 kHz.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press the [TUNER/BAND] button to select “AM”.

3. Press the I/1 button to turn the power off.

4. Press two buttons of [PLAY MODE/TUNING MODE] and I/1
simultaneously.

5. The message “AM 9K STEP” or “ AM 10K STEP” is displayed
on the fluorescent indicator tube, and thus the channel step is
changed over.

CD SHIP (LOCK) MODE

This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press the [CD] button to select “CD”.

3. Press two buttons of [CD] and [POWER] simultaneously.

4. The message “LOCK” is displayed on the fluorescent indicator
tube, and the CD ship mode is set.

CD SHIP (LOCK) MODE & COLD RESET

This mode is used to perform CD chip (lock) mode and cold reset
simultaneously.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press the [CD] button to select “CD”.

3. Press three buttons of x , [CD] and [POWER] simultaneously.

4. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.

CHANGE-OVER FUNCTION OF SAT/VIDEO

This mode is used to enable function of external input to change
over between SAT and VIDEO.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press two buttons of VIDEO/SAT and I/1 simultaneously.

3. The message “SAT” or “VIDEO”is displayed on the
fluorescent indicator tube, and the function of external input
is changed over.

CD TRAY LOCK MODE

This mode is used to unable to take sample disc out of tray in the
shop.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press the [CD] button to select “CD”.

3. Set disc on the CD tray, press two buttons of x and Z for 5
seconds.

4. The message “LOCKED” is displayed on the fluorescent
indicator tube and the CD tray is locked. (Even if pressing
the Z button, the message “LOCKED” is displayed on the
fluorescent indicator tube and the CD tray is locked)

5. To release from this mode, press two b uttons of x and Z for
5 seconds.

6. The message “UNLOCKED” is displayed on the fluorescent
indicator tube and the CD tray is unlocked.

AMP TEST MODE

This mode is used to display the parameter of amplifier IC and
display the VACS status.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press three buttons of x , [P FILE] and [PLAY MODE/TUNING
MODE] simultaneously.

3. When the AMP test mode is activated, the message “AMP
TEST IN” is displayed on the fluorescent indicator tube
momentarily, then amplif ier adjustment mode is displayed on
the fluorescent indicator tube.

4. Press the [DISPLAY] button to changed over between VACS
status display mode and the amplifier IC parameter display
mode.

5. In the amplifier IC parameter display mode, press the [i-BASS]
button to changed over DBFB on/off, and when it is on, the
character “D” is displayed on the fluorescent indicator tube.

6. In the amplifier IC parameter display mode, press the [SOUND
FIELD] button to changed o ver surround on/of f, and when it is
on, the character “S” is displayed on the fluorescent indicator
tube.

7. In the amplifier IC parameter display mode, turn each knob of
[BASS], [MIDDLE] and [TREBLE] causes respective parameters
to be changed, as well as change-over of the display on the
fluorescent indicator tube.

CD SERVICE MODE

This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press the [CD] button to select “CD”.

3. Press three buttons of x , [P FILE] and Z simultaneously.

4. When the CD service mode is activated, the message “MPEG
AV TEST” is displayed on the fluorescent indicator tube.

5. Press the M button, optical pick-up move to outside track
and the message “SLED OUT” is displayed on the fluorescent
indicator tube.

6. Press the m button, optical pick-up move to inside track and
the message “SLED IN” is displayed on the fluorescent
indicator tube.

7. Press the [P FILE] button, traverse on/off is changed over.

8. Press the [PRESET EQ] button when MPEG AV Test mode is
activated, the massage “SERVICE MODE” is displayed on
the fluorescent indicator tube and AV Test mode is activated.

17

CX-JV77

AGING MODE

This mode can be used for operation check of CD section and tape
deck section.
CD section and tape deck section work in parallel.

If an error occurred:

The aging operation stops only an error occurred sections and display
then status.

If no error occurs:

The aging operation continues repeatedly.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press the [CD] button to select “CD”.

3. Set disc on the CD tray and set tape into the deck.

4. Press three buttons of x , [P FILE] and [DISC SKIP/EX-CHANGE]
simultaneously.

5. Aging operations of CD and tape are started at the same time.

6. To release from this mode, press the I/1 button to turn the
power off and press the function buttons.

1. Display at the Aging Mode

Display operating state of CD section and tape deck section
alternately.
If an error occurred, stop display which that section.

2. CD Section

The sequence during the aging mode is following as below.
Display at the aging mode is the same as the normal operation.

Aging mode sequence (CD section) :

3. Tape Deck Section

The sequence during the aging mode is following as below.
If an error occurred, stop display that step.

Aging mode sequence (tape deck section) :

Rewind the tape A and B

“TAPE AAG-1 or TAPE BAG-2”

Shut off

FWD play the tape A

“TAPE AAG-3”

2 minutes

Rewind the tape A

“TAPE AAG-6”

Shut off

FWD play the tape B

“TAPE BAG-3”

2 minutes

Rewind the tape B

“TAPE BAG-6”

Shut off

Start (from disc 1)

Disc chucking

TOC read

Play first track for 2 seconds

Play last track for 2 seconds

EX-change open/close

Open the disc tray

Disc skip

Close the tray

Change the next disc.

Note: “TAPE *AG-*” is display of each step.

PANEL TEST MODE

This mode is used to check the fluorescent indicator tube, LEDs
and buttons.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press three buttons of x , [P FILE] and [ENTER] simultane­ously.

3. Fluorescent indicator tube and LEDs are all turned on.

4. Press two buttons of X and [ENTER] simultaneously, mode
is changed over.

5. In the key check mode, press each key , the defined key number
of every each key list is displayed on the fluorescent indicator
tube.

6. In the key count check mode, “KEYCNT 0” is displayed on
the fluorescent indicator tube. Each time a key is pressed, “K”
value increases. Howe ver, once a ke y is pressed, it is no longer
taken into account.

7. In the headphone input check mode, connect the headphone,
the message “H_P ON” is displayed on the fluorescent
indicator tube, and disconnect the headphone, the message
“H_P OFF” is displayed on the fluorescent indicator tube.

8. In the volume check mode, “VOLUME FLAT” is displayed
on the fluorescent indicator tube. Turn the [VOLUME] knob
clockwise, the message “VOLUME UP” is displayed on the
fluorescent indicator tube momentarily and turn the [VOLUME]
knob counterclockwise, the message “VOLUME DOWN” is
displayed on the fluorescent indicator tube momentarily.

18

CX-JV77

MC TEST MODE

This mode is used to check operations of microprocessor.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press three buttons of x , [P FILE] and [DISC 3] simultane­ously.

3. When the MC test mode is activated, VACS level is displayed
on the fluorescent indicator tube momentarily.

4. Turn the [AMS/TUNING] knob clockwise, the message “ALL
EQ MAX” is displayed on the fluorescent indicator tube
momentarily and turn the [AMS/TUNING] knob counter­clockwise, the message “ALL EQ MIN” is displayed on the
fluorescent indicator tube momentarily.

5. Press the [PRESET EQ] button, the message “ALL EQ FLAT”
is displayed on the fluorescent indicator tube momentarily.

6. Turn the [VOLUME] knob clockwise, the message “VOLUME
MAX” is displayed on the fluorescent indicator tube
momentarily and turn the [VOLUME] knob counterclockwise,
the message “VOLUME MIN” is displayed on the fluorescent
indicator tube momentarily.

7. Press the [i-BASS] button to changed over VACS on/off.

8. When the [REC PAUSE/START] button is pressed twice with a
tape set in the deck-B, the function is switched “MD” or
“VIDEO” and recording starts. When the m or M button
is pressed during recording, the tape is rewound back to the
beginning of recording, the function is switched to “TAPE
B”, then playback starts.

9. When the [CD SYNC] key is pressed with the test tape (AMS-
100, AMS-110A) in the deck, number of space between tunes
is counted, then if AMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.

10. Press the

I/1 button to release from this mode, then cold reset

is performed.

VERSION DISPLAY MODE

This mode is used to check the model, destination and software
version.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press three buttons of x , [P FILE] and [DISC 2] simultane­ously.

3. When this mode is activated, model and destination is displayed
on the fluorescent indicator tube.

4. Press the [DISPLAY] button to changed ov er between software
version and year, month, day of the software creation display
mode and model and destination display mode.

5. To release from this mode, press three b uttons of x , [P FILE]
and [DISC 2] simultaneously.

CD ERROR CODE DISPLAY MODE

This mode can be used for error code display of CD section.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press the [CD] key to select “CD”.

3. Press three buttons of x , [CD] and [DISC 1] simultaneously.

4. When this mode is activated, mechanism deck error code is
displayed on the fluorescent indicator tube.

5. Press the [i-BASS] button to changed over between optical pick­up error code display mode and mechanism deck error code
mode.

6. Turn the [AMS/TUNING] knob to change over display of error
history.

1. Mechanism Deck Error Code Mode

When this mode is entered, mechanism deck error code is displayed
with the 10-character format on the fluorescent indicator tube.

The first digit from the left indicates:

The first digit from the left indicates which mode the error history
is. In the mechanism deck error code mode, “M” is displayed on
the fluorescent indicator tube.

The second digit from the left indicates:

(Error history No. display)
The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error .

The third and 4th digit from the left indicates:
(Error status display)

The third and 4th digit from the left indicates which error status is
indicated.

Display Status

00 No error
08 Table operation time-out (Table does not move to the tar get

position within the specified time)

16 In the chucking down operation, the operation was retried

by the maximum number of times but the operation could
not be completed

17 In the chucking up and down operation, the reverse

recovery processing was attempted but it could not be
recovered

18 In the chucking up operation, the operation was retried by

the maximum number of times but the operation could not
be completed

20 Loading operation time-out (Table does not move to the

target position within the specified time)

22 As the chuck was in the ex-open status at the initialization,

the closing was attempted but could not be completed

The 5th and 6th digit from the left indicates:
(Present status display)

The 5th and 6th digit from the left indicates which operating status
when an error occurred is indicated.

Display Status

01 Open completion status
02 From open status, the movement to chucking down position

is under way

03 From chucking down position, the open operation is under

way
04 Chucking down completion status
10 The chucking down operation is under way
11 The chucking up operation is under way
12 Close completion status
13 From close status, the ex-open operation is under way
14 From ex-open status, the close operation is under way
18 Ex-pen completion status

19

CX-JV77

The 7th and 8th digit from the left indicates:
(Motor status display)

The 7th and 8th digit from the left indicates which motor output
status when an error occurred is indicated.

Display Status

× 0 No table motor output
× 1Table motor forward output
× 2Table motor backward output
× 3Table motor break output

0 × No loading motor output
1 × Loading motor forward output
2 × Loading motor backward output
3 × Loading motor break output

The 9th and 10 th digit from the left indicates:
(Tray status display)

The 9th and 10th digit from the left indicates which target processing
when an error occurred is indicated.

Display Status

01 Open operation
12 Close operation
18 Ex-open operation

2. Optical Pick-up Error Code Mode

When this mode is entered, optical pick-up error code is displayed
with the 8-character format on the fluorescent indicator tube.

The first digit from the left indicates:

The first digit from the left indicates which mode the error history
is. In the optical pick-up error code mode, “D” is displayed on the
fluorescent indicator tube.

The second digit from the left indicates:
(Error history No. display)

The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.

The third and 4th digit from the left indicates:
(Error status display)

The third and 4th digit from the left indicates which error status is
indicated.

Display Status

01 Not focused (TOC read without a disc)
02 GFS NG (TOC read with a disc chucked)
03 Start operation time-over
04 Defocused continuously (Defocused during TOC reading)
05 Q code not entered for specified time
06 Tracking not turned ON
07 Blank disc (Blank disc TOC read)

The 5th and 6th digit from the left indicates:
(Error step display)

The 5th and 6th digit from the left indicates which processing when
a trouble occurred

Display Contents

01 Power OFF in progress
02 Initialize in progress
03 Oscillation stopping
04 From oscillation stop, oscillation starting
05 Stopping
06 Stop operation is under way
07 Start operation in progress
08 TOC read in progress
09 Search operation is under way
0A Playback operation is under way
0B Pause operation is under way
0C Playback manual search operation is under way
0D Pause manual search operation is under way
0E —

The 7th and 8th digit from the left indicates:

The 7th and 8th digit from the left indicates which operation in
progress when a trouble occurred. (Step of each processing of the
5th and 6th digits is indicated)

5 REPEAT LIMIT CANCEL MODE

Number of repeat for CD playback is 5 times when the repeat mode
is “REPEAT”. This mode is used to enables CD to repeat playback
for limitless times.

Procedure:

1. Press the

I/1 button to turn the power on.

2. Press the [CD] button to select “CD”.

3. Press three buttons of x , [CD] and [ENTER] simultaneously.

4. The message “LIMIT OFF” is displayed on the fluorescent
indicator tube momentarily, CD repeat 5 limit is cancelled.

VCD COLOR SYSTEM MODE

This mode is used to change over color system.

Procedure:

1. Set to the standby state.

2. Press two buttons of m and I/1 simultaneously to change
the color system to PAL, and the message “COLOR PAL” is
displayed on the fluorescent indicator tube.

3. Press two buttons of X and I/1 sim ultaneously to change
the color system to A UTO, and the message “COLOR A UTO”
is displayed on the fluorescent indicator tube.

4. Press two buttons of M and I/1 simultaneously to change
the color system to NTSC, and the message “COLOR NTSC”
is displayed on the fluorescent indicator tube.

20

SECTION 5

)

RF signal waveform

VOLT/DIV : 200mV
TIME/DIV : 500ns

level : 0.75

±

0.1Vp-p (RFDC)

1.05

±

0.3Vp-p (RFAC)

p

ELECTRICAL ADJUSTMENTS

CX-JV77

CD SECTION

Note:

1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.

2. Use LUV-P01 (Part No. 4-999-032-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MW impedance.

4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.

S-CURVE CHECK

oscilloscope

BD49 board

TP68 (FE)

TP73 (DVC)

Procedure :

1. Connect an oscilloscope to TP68 (FE) and TP73 (DVC) on
the BD49 board.

2. Press the I/1 button to turn the power on.

3. Load the disc (LUV-P01) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)

4. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak le vel
within 2 ± 0.5 Vp-p.

S-curve waveform

+
–

symmetry

A

within 2

B

±

0.5Vp-

Note: Clear RF signal waveform means tha t the shape “ ◊ ” can be clearl y

distinguished at the center of the waveform.

TRAVERSE LEVEL CHECK

oscilloscope

BD49 board

TP70 (TE)

TP73 (DVC)

Procedure :

1. Connect an oscilloscope to TP70 (TE) and TP73 (DVC) on
the BD49 board.

2. Press the I/1 button to turn the power on.

3. Load the disc (LUV -P01) and playback the number nine track.

4. Press the hH button. (Becomes the 1 track jump mode.)

5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.

1 track jump waveform

DVC

+
–

center of
waveform

B

A (DC voltage

Note: • Try to measure several times to make sure than the ratio

RF LEVEL CHECK

Procedure :

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.

BD49 board

TP71 (RFDC)

TP72 (RFAC)

TP73 (DVC)

oscilloscope

+
–

1. Connect an oscilloscope CH1 to TP71 (RFDC), CH2 to TP72
(RFAC) and TP73 (DVC) on the BD49 board.

2. Press the I/1 button to turn the power on.

3. Load the disc (LUV -P01) and playback the number nine track.

4. Confirm that oscilloscope waveform is clear and check if RF
signal level is correct or not.

level=1.2 ±0.55Vp-p

Connecting Location:

– BD49 BOARD (Conductor Side) –

TP6

(RFDC)

TP5 (RFAC)

TP4 (FE)
TP2 (TE)

TP (DVC)

symmetry

21

CX-JV77

r

VIDEO SECTION

AUDIO LEVEL, VIDEO CLOCK, AUDIO SERVO
CLOCK CHECK

VMP43GY board

TP415 (L-OUT)

TP413 (R-OUT)

VMP43GY board

TP70 (54 MHz)

TP182 (4.2336 MHz)

Procedure :

1. Connect an oscilloscope to TP308 (V -OUT) on the VMP43GY
board.

2. Connect a level meter to TP415 (L-OUT) and TP413 (R-OUT)
on the VMP43GY board.

3. Connect a frequency counter to TP70 (54 MHz) and TP182
(4.2336 MHz) on the VMP43GY board.

3. Press the I/1 button to turn the power on.

4. Set a test disc (HLV-402 (Part No. 8-909-870-00))

5. Set to the MPEG AV TEST mode. (Refer to the CD SERVICE
MODE (See page 17))

6. The message “MPEG AV” is displayed on the flourescent
indicator tube. Color bar signal outputs and sine-wave (1 kHz
0dB) appears.

7. Confirm that the value of level meter is 2.5 ± 2.0 dBs. (If audio
output disappear, press the [PRESET EQ] button, and the
message “SERVICE MODE” is displayed on the flourescent
indicator tube)

8. Confirm that the value of frequency counter is 54 MHz ± 400
Hz.

9. Confirm that the value of frequency counter is 4,2336 MHz.

10. Change disc to a MP3 test disc (MP3 1kHz 0dB sine-wave is
recorded)

11. Confirm that the value of level meter is 2.4 ± 2.0 dBs.

level meter

+
–

frequency counte

+
–

– VMP43GY BOARD (Component Side) –

TP70

(54 MHz)

TP182

(4.2336 MHz)

TP415

(L-OUT)

TP413

(R-OUT)

22

SECTION 6

DIAGRAMS

6-1. BLOCK DIAGRAM – CD SERVO Section –

CX-JV77

DETECTOR

OPTICAL PICK-UP

BLOCK

(KSM-213DHAP)

LASER DIODE

PD

M102

M

(SPINDLE)

M101

M

(SLED)

2-AXIS
DEVICE

(TRACKING)

(FOCUS)

FREQUENCY

SELECT SWITCH

Q102

RF AMP,

FOCUS/TRACKING ERROR AMP

A

6

B

7

C

8

D

9

F

11

F I-V AMP

E

10

E I-V AMP

AUTOMATIC

POWER

CONTROL

LD

Q101

LD

1

SP+

16

SP–

15

SD+

14

SD–

13

TD+

12

TD–

11

FD+

18

FD–

17

RF

SUMMING

AMP

FOCUS

ERROR AMP

RF DC

AMP

TRACKING

ERROR AMP

APC LD

AMP

FOCUS/TRACKING COIL DRIVE,

SPINDLE/SLED MOTOR DRIVE

MOTOR

DRIVE

MOTOR

DRIVE

DRIVE

COIL

DRIVE

COIL

IC150

SFDR

SRDR

TFDR

TRDR

FFDR

FRDR

MUTE

20

AC

SUM

RFDCO

RFDCI

TE_BAL

SW

24

4

5

6

7

22

23

IC103

EQ

4

FE

16

FEI

17

28

29

TE

18

19

12

PD

2

27

IN

3

2

RFAC

VCA

D/A1

D/A3

FEBAL

D/A4

D/A2

26

EQ

RFC

RFAC

D/A1
D/A2
D/A3
D/A4
FEBAL

15

3

AO3

5

AO4
AO5

6
9

AO6

2

AO2

173

164

160

162
163

D/A

CONVERTER

IC506

RST

4

RFAC

FE

RFDC

TE
SE

MDP

133

DI

CLK

LD

189

24

XTSL

GPIO9

SFDR

SRDR

137 138 140

DATA

12

CLK

11
10

LD

FILTER

171

168 170

FILO

DIGITAL SIGNAL PROCESSOR,

DIGITAL SERVO PROCESSOR

TFDR

TRDR

FFDR

141

142

PCO

IC505 (1/2)

FRDR

143

169

CLTV

81

FILI

SYSRST

91

PCMD

93

BCK

88

LRCK

124

C2PO

102

DATA

111

CLOK

109

XLAT

113

SENS

126

SCOR

96

SQSO

98

L SQCK

114

L SCLK

121

GFS

131

L FOK

105

L CDXRST

SSTP

135

When the optical

ON :

S101

(LIMIT)

pick-up is inner
position

90
92
87
123

103
110
108
112
125
95
99
115
120
132
106

M751

(LOADING)

M741

(TABLE)

L CDDATA

L CDBCK
L CDLRCK
L CDC2PO

L DDAT
L DCLK
L XLAT
L SENS
L SCOR
L SQSO
SQCK
SCLK
L GFS
FOK
XRST

M

M

TABLE ADDRESS

SENSOR

IC731

DISC TRAY

ADDRESS DETECT

S751

OPEN/CLOSE

DETECT

TO IC505 (2/2)

AUDIO/VIDEO

SECTION

LOADING MOTOR DRIVE

IC701

4 OUT1

2 OUT2

TABLE MOTOR DRIVE

IC712

4 OUT1

2 OUT2

LEVEL SHIFT

Q731

ROTARY

ENCODER

S711

OPEN

CLOSE

7FIN

9RIN

7FIN

9RIN

• SIGNAL PATH

: CD PLAY

LM-F

LM-R

TM-F

TM-R

TABLE

TRAY

O/C

DATA, CLK, LD

LM-F, LM-R,

TM-F, TM-R

TABLE,

TRAY, O/C

A

B

C

(Page 25)

(Page 24)

(Page 24)

CX-JV77

SYS RST

D

(Page 24)

2323

CX-JV77

6-2. BLOCK DIAGRAM – AUDIO/VIDEO CD Section –

NVOEL

74

24

OE

D0 – D7

13 – 15, 17 – 21

DQ0 – DQ7

XTAO

150 149

X501

33.8688MHz

12 – 5, 27, 26, 31

A0 – A9, A18

PROGRAM ROM

IC508

XTAI

A0 – A10

CLKB

CLKA

207 206

X502

27MHz

D8 – D15

23, 25, 4, 28, 29, 3, 2, 30

A10 – A17

ADDRESS BUS

DATA BUS

MPEG VIDEO/AUDIO DECODER,

VIDEO SIGNAL ENCODER

DRDAT0 – DRDAT15

D0 – D15

2, 4, 5, 7, 8, 10, 11, 13, 42,

44, 45, 47, 48, 50, 51, 53

DQ0 – DQ15

IC505 (2/2)

DRADR0 – DRADR10

34 – 37, 39 – 4549 – 56, 59 – 66

D0 – D15

A0 – A10

23 – 26, 29 – 34, 22

A0 – A10

A0 – A10

D-RAM

IC507

DRCAS

DRRAS

DRWEL

DRCK

73 72 68

70 76 77 78

18

16 17 20

38 15

WE

CLK

CAS

RAS

FROM IC505 (1/2)

CD SERVO

SECTION

DRDQM1

DRDQM0

DRBS

39

BA0

LDQM

UDQM

GPIO1

GPIO0

13 14

99

98

I-SYS-IN

O-SYS-OUT

GPIO5

GPIO2

15 19 18 16

96

95

100

I-SYS-CS

I-SYS-CLK

O-VIDEO-MUTE

AUDDTO0

AUDBCK

AUDLRCK

AUDXCLKO

GPIO14
GPIO13
GPIO11
GPIO12

GPIO3

GPIO4

97

O-SYS-OK

O-SYS-REQ

CPSIG

+3.3V

REGULATOR

Q581

5

VDD

DATA

DATA

2
1

BCK

3

LRCK

16

MLCK

DATA

13
14

CLK

15

LAT

SYNC BUFFER

Q301

DIGITAL FILTER,
D/A CONVERTER

IC504

201
203
204

205

30
29
26
28

6

LAT

CLK

B.P.F.

7

6

VOUTL

VOUTR

CD +5V

VCC

7

8

VIDEO AMP

3

IN

VIDEO MUTING

CONTROL SWITCH

IC307

OUTSAG

STBY

2

Q370

LOW-PASS

OUT

FILER
IC102

6
5

R-CH

CD-L

MUTING

Q306

R-CH

MUTING
CONTROL
Q304, 305

CD-MUTING

DATA, CLK, LD

VIDEO OUT

J310

E

J

C

(Page 25)

(Page 25)

(Page 23)

CX-JV77

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: CD PLAY (AUDIO)

: CD PLAY (VIDEO)

: MIC

(Page 23)

(Page 23)

B

D

TABLE,
TRAY, O/C

SYS-RST

TABLE
TRAY
O/C

SYSTEM CONTROLLER

IC601 (1/3)

73 I-CD NUM SENSER
20 I-CD ENCODER
21 I-CD OPEN/CLOSE

93 O-XRES

WFR/HP/MIC-IN

2424

J802

MIC

MIC +9V

MUTING

Q802

MIC DETECT

Q372

19

+

MIC AGC

Q801

MIC AMP

IC801 (1/2)

VR801

MIC LEVEL

ECHO AMP

IC802

MIC AMP

IC801 (1/2)

VR802

ECHO LEVEL

MIC

HP DET

F

G

(Page 25)

(Page 25)

6-3. BLOCK DIAGRAM – MAIN Section –

CX-JV77

(Page 24)

(Page 24)

FM 75Ω

COAXIAL

AM

HP1

(PB)

(DECK-A)

MIC

F

JK101 (1/2)

VIDEO/SAT

IN

CD-L

E

FM/AM TUNER PACK

FM ANT

ANT GND

AM ANT

ANT GND

L-CH

R-CH R-CH

L-CH

L

R

TUNER-L

TUNER-R

LC72121 DI

LC72121 DO

LC72121 CLK

LC72121 CE

TUNED

STEREO

TU MUTE

R-CH

R-CH

CLK

TUNED

STEREO

TU-MUTING

JK101 (2/2)

FEED BACK

SWITCH

Q106

+

L

R

VIDEO/SAT

R-CH

D201

OUT

POWER ON

MUTING

Q105

B+9V

LINE AMP

IC102

R-CH

MUTING

Q103

MUTING
CONTROL
Q101, 102

R-CH

R-CH

POWER

AMP

IC441

STANDBY

SWITCH

Q489

LEVEL
SHIFT

Q490, 491

POWER AMP

ON/OFF

Q308

TH441

POWER ON

MUTING

Q309, 313

THERMAL

DETECT

Q483, 484

OVER LOAD

Q441, 442

B+9V

PROTECT

Q485, 487

DETECT

+

DETECT

D481

+

DC

DETECT

Q481, 482

–1

–2

RY441

PROTECTOR

Q486, 488

+

JK441

+
–

+
–

+
–

+
–

L

FRONT SPEAKER

IMPEDANCE

USE 6 – 16Ω

R

L

SURROUND SPEAKER

IMPEDANCE

R

USE 24Ω

J801

PHONES

58

MD L

63

CD L

1

TUNER L

61

TAPE L

DO

DI

CE

3

7

9

11

PB OUT1

TAPE A1
TAPE B1

MIC

LINE OUT1 L

TONE OUT1

54

37

INPUT SELECT,

TONE CONTROL,

ELECTRICAL VOLUME

36

IC101

VIN1

VOL OUT1

SAOUT1

AMS OUT

REC OUT1

SI

19

18

R-CH

33

56

R-CH

40

15

SC

HRPE1

(REC/PB/ERASE)

(DECK-B)

(Page 23)

(Page 24)

(Page 26)

R-CH R-CH

ERASE

LM-L, LM-R,
TM-L, TM-R

A

CD-MUTING

J

FRONT SP RELAY

H

REC/PB

SWITCH

IC201,

Q322, 323

BIAS OSC

L101

TU-MUTING

LM-F
LM-R
TM-F
TM-R

DI

CE

DO

CLK

TUNED

STEREO

83

86

84

67

85

O-LC72121/BU2099FV DO

68

I-TUNED-IN

I-LC72121 DI

I-STEREO-IN

O-LC72121 CE

O-LC72121/BU2099FV CLK

11

14
13
16
15

10

17

BIAS OSC

Q321

Q5

Q8
Q7
Q10
Q9

Q4

Q11

REC BIAS

SWITCH

Q324

7

Q16Q0

DATA4CLOCK5LCH

3

LOADING/TABLE

MOTOR DRIVE

IC371

Q6

12

87

O-BU2099FV LCH

B +9V

91

88

O-BD3401 CLK

O-BD3401 DATA

AMS DETECT

Q327

69

I-AMS-IN

SYSTEM CONTROLLER

IC601 (2/3)

BAND-PASS

FILTER

Q351, 352

24

I-STREAM/VACS

18

I-PROTECT

75

O-SYSTEM-MUTE

2

4

MOTO

3

SOL-A

I-TAPE A STAT

SOL-B

I-TAPE B STAT

I-REEL A IN

I-REEL B IN

Q606

Q608

Q607

22

23

70

71

CAPSTAN/REEL

MOTOR DRIVE

Q601

PLUNGER DRIVE

(DECK-A)

Q603

PLUNGER DRIVE

(DECK-B)

Q602

D207

TAPE MECHANISM

DECK BLOCK

MM

(CAPSTAN/REEL)

(DECK-A)

(DECK-B)

A-HALF

A-MODE

REC (REW)

B-HALF

B-MODE

REC (FWD)

A-PHOTO

B-PHOTO

HP DET

G

(Page 24)

D206

FAN MOTOR

+

DRIVE

Q310

M901

MM

(FAN)

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: TUNER

: CD PLAY

: TAPE PLAY (DECK-A)

: TAPE PLAY (DECK-B)

: REC

: AUX IN

: MIC

CX-JV77

2525

CX-JV77

6-4. BLOCK DIAGRAM – PANEL/POWER SUPPLY Section –

SYSTEM CONTROLLER

IC601 (3/3)

S1 – 21

52 – 65

43 – 45, 47 – 50,

G1 – G13

42 – 30

9 I-VOLUME-IN1

10 I-VOLUME-IN2

81 I-MULTI-JOG IN1
82 I-MULTI-JOG IN2

INDICATOR TUBE

VOLUME

AMS/

TUNING

FLUORESCENT

FL601

ROTARY

ENCODER

S660

ROTARY

ENCODER

S661

O-VIDEO-POWER

O-POWER LED

O-I-BASS LED

I-SIRCS-IN

+4.5V

CD +4.5V

CD +2.5V

CD +3.3V

CD +5V

94

76

77

28

LED DRIVE

Q609

REMOTE CONTROL

RECEIVER

IC610

LED601

I/1

LED602

i-BASS

REGULATOR

Q201

+2.5V

REGULATOR

IC201

+3.3V

REGULATOR

IC202

+5V

REGULATOR

IC302

D316

B+ SWITCH

Q314, 315

B+ SWITCH

Q301, 302

M +9V

CD M+7V

D321

B+3.5V

B+9V,

MIC +9V

UNREG +16V

D324 – 326

AMP B+ 2

AMP B– 2

AMP B+ 1

AMP B– 1

+3.3V

REGULATOR

IC301

+9V

REGULATOR

IC303

+9V

REGULATOR

IC304

RECT
D402

RECT
D401

RECT

D301 – 304

RECT

D305 – 308

F904,
F905

F908,
F909

F906

MAIN POWER

TRANSFORMER

PT901

AC-VL

AC-VH

AC3

(Page 25)

S601 – 610,
S621 – 630,

S641 – 650

(FRONT PANEL KEYS)

FRONT SP RELAY

H

X601

32.768kHz

X602

10MHz

I-KEY1 –
I-KEY3

27 – 25

I-XT1

1312O-XT2

15

CF1

CF2

16

F907

AC4

SUB POWER

TRANSFORMER

PT902

VOLTAGE

SELECTOR

S901

RY901

RELAY DRIVE

Q361, 362

W001

(AC IN)

–27V

REGULATOR

Q902

D610

RECT

D309 – 312

RECT

D902 – 904

D908
RECT

RY B+

+12V

FAN B+

29I-AC CUT

11RESET

74O-POWER RELAY

REGULATOR

Q311

VDD2

VDD1,

VDD3/4

B+ SWITCH

Q312

B+ SWITCH

Q604, 616

D609

D607, 608

RESET SWITCH

Q605

TO

FLUORESCENT

INDICATOR TUBE

B+3.5V

VF1, 2

–VFL

EVER +10V

+3.3V

REGULATOR

IC603

VOLTAGE

DETECT

IC604

VP

CX-JV77

2626