Sony HCD-LV80 Service manual

HCD-LV80

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SERVICE MANUAL

HCD-LV80 is the tuner, deck, CD and amplifier section in LBT-LV80.

Model Name Using Similar Mechanism HCD-VR50/VR70

CD

SECTION

TAPE DECK

SECTION

CD Mechanism Type CDM37L-5BD34L Base Unit Type BU-5BD34L Optical Pick-up Type KSS-213D/Q-NP Model Name Using Similar Mechanism NEW T ape Transport Mechanism Type TCM-230PWR12

E Model

Amplifier section

The following measured at AC 120/220/240 V, 50/60 Hz DIN power output (Rated)

Continuous RMS power output (Reference)

(4 ohms at 1 kHz, 10 %

Inputs PHONO IN (phono jacks): sensitivity 3 mV, impedance 47 kilohms MIC 1/2 (phono jack): sensitivity 1 mV, impedance 10 kilohms VIDEO 1 IN (phono jacks):sensitivity 250 mV, impedance 47 kilohms VIDEO 2 IN (phono jacks):sensitivity 250 mV,

MD IN (phono jacks): sensitivity 450 mV, impedance 47 kilohms

Outputs PHONES (stereo phone jack):

VIDEO OUT (phono jack): voltage 250 mV, impedance 1 kilohm MD OUT (phono jacks): voltage 250 mV, impedance 1 kilohm

240 + 240 watts (4 ohms at 1 kHz, DIN)

300 + 300 watts

THD)

impedance 47 kilohms

accepts headphones of 8 ohms or more

SPECIFICATIONS

FRONT SPEAKER :

Video section

Inputs VIDEO1 IN (phono jacks): 1 V p-p, 75 ohms VIDEO2 IN (phono jacks): 1 V p-p, 75 ohms

Outputs VIDEO OUT (phono jack):1 V p-p, 75 ohms S-VIDEO OUT (4-pin/mini-DIN jack):

VIDEO CD/CD player section

System Compact disc, digital

Laser Semiconductor laser

Laser output Max. 44.6 µW*

Wavelength 780 - 790 nm Fre

uency Response 2 Hz - 20 kHz (±0.5 dB

accepts impedance of 4 to 16 ohms

Y: 1 V p-p, unbalanced, Sync negative, C: 0.286 V p-p, load impedance 75 ohms

audio and video system (λ = 780 ohm), Emission

duration : continuous

* This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture.

Signal-to-noise ratio More than 90 dB Dynamic range More than 90 dB CD DIGITAL OUT (square optical connector jack, rear panel) Video color system format

Wave length: 660 nm Output level: –18 dBm

Tape player section

Recording system 4-track 2-channel stereo Frequency Response (DOLBY NR OFF)

— Continued on next page —

NTSC, PAL

40 - 13,000 Hz (±3 dB), using a Sony TYPE I cassette 40 - 14,000 Hz (±3 dB), using a Sony TYPE II cassette

COMPACT Hi-Fi STEREO SYSTEM

1

Tuner section

FM Stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 - 108.0 MHz (50 kHz

Antenna: FM Wire antenna Antenna terminals 75 ohm unbalanced Intermediate frequency 10.7 MHz

step)

AM tuner section

Tuning range Middle Eastern models: 531 - 1,602 kHz (with the

Other models: 531 - 1,602 kHz (with the

Antenna AM loop antenna,

Intermediate frequency 450 kHz

tuning interval set at 9 kHz)

tuning interval set at 9 kHz) 530 - 1,701 kHz (with the tuning interval set at 10 kHz)

External antenna terminals

General

Power Requirements 120 V, 220 V, or 230 - 240

Power Consumption

Dimensions(w/h/d) Approx. 356 × 423 × 446

Mass Approx. 15.9 kg

Supplied Accessories AM loop antenna (1)

Remote (1)

Design and specifications are subject to change

without notice.

V AC, 50/60 Hz Adjustable with voltage selector

300 watts

incl. projecting parts and controls

FM wire antenna (1) Speaker cords (2)

R6(size AA) batteries (2) Video connecting cable (1)

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

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 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.

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

This caution label is located inside the unit.

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

MODEL IDENTIFICATION — BACK PANEL —

MODEL PARTS No.

MY, SP model 4-227-751-2

Parts No.

EA model 4-227-751-3

• Abbreviation SP : Singapore model EA : Saudi Arabia model MY : Malaysia model

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

s s

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 waveform is output four times.

3

TABLE OF CONTENTS

1. SERVICING NOTE .......................................................... 5

2. GENERAL ....................................................................9

3. DISASSEMBLY

3-1. Front Panel and Video Board .............................................. 11

3-2. Main Board ......................................................................... 11

3-3. Sub Panel ............................................................................ 12

3-4. CD LID Assembly .............................................................. 12

3-5. Tape Mechanism Deck and Cassette LID ........................... 12

3-6. CD Mechanism Deck..........................................................13

3-7. Base Unit............................................................................. 13

3-8. Disc Table ........................................................................... 13

4. TEST MODE ..............................................................14

5. MECHANICAL ADJUSTMENTS ..........................15

6. ELECTRICAL ADJUSTMENTS ............................... 15

7. DIAGRAMS

7-1. Circuit Boards Location......................................................19

7-2. Block Diagrams

• BD Section ....................................................................... 20

• Deck Section .................................................................... 21

• Main (1/2) Section ...........................................................22

• Main (2/2) Section ...........................................................23

• Video Section................................................................... 24

• Power Section ..................................................................25

• Display Section ................................................................ 26

7-3. Printed Wiring Board – BD Section –................................. 28

7-4. Schematic Diagram – BD Section – ...................................29

7-5. Schematic Diagram – Deck Section –................................. 30

7-6. Printed Wiring Board – Deck Section –.............................. 31

7-7. Printed Wiring Board – Video Section – ............................. 32

7-8. Schematic Diagram – Video (1/3) Section – ....................... 33

7-9. Schematic Diagram – Video (2/3) Section – ....................... 34

7-10. Schematic Diagram – Video (3/3) Section – ..................... 35

7-11. Printed Wiring Board – Main Section – ............................ 36

7-12. Schematic Diagram – Main (1/3) Section – ...................... 37

7-13. Schematic Diagram – Main (2/3) Section – ...................... 38

7-14. Schematic Diagram – Main (3/3) Section – ...................... 39

7-15. Printed Wiring Board – Power Section – ......................... 40

7-16. Schematic Diagram – Power Section – ............................ 41

7-17. Printed Wiring Board – Panel FL Section – ..................... 42

7-18. Schematic Diagram – Panel FL Section – ........................ 43

7-19. Printed Wiring Board – Panel VR Section – .................... 44

7-20. Schematic Diagram – Panel VR Section – ....................... 45

7-21. Printed Wiring Board – TC Panel Section –..................... 46

7-22. Schematic Diagram – TC Panel Section – ....................... 47

7-23. Printed Wiring Board – CD Panel Section – .................... 48

7-24. Schematic Diagram – CD Panel Section – ....................... 49

7-25. Printed Wiring Board – CD Motor Section – ................... 50

7-26. Schematic Diagram – CD Motor Section – ...................... 51

7-27. Schematic Diagram – Trans Section – ............................. 52

7-28. Printed Wiring Board – Trans Section –...........................53

7-29. Schematic Diagram – Leaf SW Section – ........................ 53

7-30. Printed Wiring Board – Leaf SW Section – .....................53

7-31. IC Block Diagrams ........................................................... 54

7-32. IC Pin Functions ............................................................... 56

8. EXPLODED VIEWS

8-1. Case and Back Panel Section..............................................66

8-2. Front Panel Section 1 .......................................................... 67

8-3. Front Panel Section 2 .......................................................... 68

8-4. Chassis Section ................................................................... 69

8-5. TC Mechanism Section 1 (TCM230PWR12)..................... 70

8-6. TC Mechanism Section 2 (TCM230PWR12)..................... 71

8-7. CD Mechanism Section (CDM37L-5BD34L).................... 72

8-8. Base Unit Section (BU-5BD34L) ....................................... 73

9. ELECTRICAL PARTS LIST ........................................ 74

4

SECTION 1

SERVICING NOTE

About CD-TEXT display

This unit is provided with a simple CD-TEXT display function. The CD-TEXT contents of 20 tracks are displayed on the fluorescent display tube. Since the function is simple, some special characters may not be displayed, or may be displayed as other characters.

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 c/CLOCK SET , ENTER , and "/1 simultaneously.

2. “COLD RESET” is displayed on the fluorescent display tube and reset is executed.

CD Delivery Mode

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

Procedure:

1. Press "/1 button to turn the set ON.

2. Press LOOP button and "/1 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 reset mode functions same as if the power cord is plugged in and out.

Procedure:

1. Press three buttons c/CLOCK SET , ENTER , and DISC 1 simultaneously.

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 pick-up.

Procedure:

1. Press "/1 button to turn the set ON.

2. Press three buttons c/CLOCK SET , ENTER , and DISC 5 simultaneously.

3. The Sled Servo mode is selected, if “CD” is blanking on the fluorescent indicator tube.

4. W ith the CD in stop status, When the M button is pressed, the optical pick-up moves outside. When m button is pressed, it moves

inside.

5. To exit from this mode, perform as follows:

1) Move the pick-up to the most inside track.

2) Execute MC cold reset. (Press the three buttons c/CLOCK SET , ENTER , and "/1 button simultaneously.)

Note:

• Always move the pick-up to most inside track when exiting from 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 9kHz and 10kHz

• A step of AM channels can be changed over between 9kHz and 10kHz.

Procedure:

1. Press "/1 button to turn the set ON.

2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM”.

3. Press "/1 button to turn the set OFF.

4. Press ENTER and "/1 buttons simultaneously, and the display of fluorescent indicator tube changes to “AM 9k STEP” or “AM 10k

STEP”, and thus the channel step is changed over.

LED and Fluorescent Indicator Tube All Lit, Key Check Mode

Procedure:

1. Press three buttons c/CLOCK SET , ENTER , and DISC 2 simultaneously.

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 @ V0 J0”. 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 . AMS > 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 manner as step 1, or disconnect the power cord.

5

AMS Test Mode

• This mode is used for checking the AMS operations of the tape deck.

JIG 7-819-039-12 Alignment tape, AMS-110A

Procedure:

1. Press the "/1 button to turn the set ON.

2. Set the tape (AMS-110A).

3. Press the three buttons c/CLOCK SET , ENTER , and DISC 3 button simultaneously.

4. “TEST MODE” is displayed on the fluorescent display tube.

5. Press the FUNCTION button and switch the function to the deck with the tape (AMS-110A).

6. Press the CD SYNC button. “AMS CHECK” is displayed on the fluorescent display tube and the tape is rewound.

7. AMS starts in the normal direction. If the AMS count is 2 at shut down, proceed to step 8. “NG” is displayed at other times, and the deck stops.

8. AMS starts in the opposite direction. If the AMS count is 2 at shut down again, “OK” is displayed. “NG” is displayed at other times.

Aging Mode

During the aging mode, both the CD player and tape deck are executed together.

• If an error occurs:

Aging stops, and the error state is displayed on the fluorescent display tube.

• If no error occurs:

Aging is repeated.

Procedure:

1. Press the "/1 button to turn the set ON.

2. Load 10 minute tapes with unbent rec-proof tabs in decks A and B.

3. Set CDs on the DISC 1 and DISC 4 tables.

4. Set the CD mode REPEAT to OFF and PLAY MODE to ALL DISCS. (Press the PLAY MODE and REPEAT buttons to set these modes.)

5. Press the FUNCTION button to switch the function to “CD”.

6. Press the three buttons c/CLOCK SET , ENTER , and DISC 4 button simultaneously.

7. Aging starts.

8. To end aging, press the "/1 button to turn the set OFF.

Aging Sequence:

Aging is performed in the following sequence.

• T ape Deck

1. The tape in deck A is rewound. “TAPE A AG-1” is displayed.

2. The FWD side of deck A is played for two minutes. “T APE A AG-2” is displayed.

3. The tape in deck A is fast forwarded. “TAPE A AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.

4. The RVS side of deck A is played for two minutes. “T APE A AG-4” is displayed.

5. The tape in deck A is rewound. “TAPE A AG-5” is displayed.

6. The FWD side of deck B is played for two minutes. “T APE B AG-2” is displayed.

7. The tape in deck B is fast forwarded. “TAPE B AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.

8. The RVS side of deck B is played for two minutes. “T APE B AG-4” is displayed.

9. The tape in deck A is rewound. “TAPE A AG-5” is displayed.

10. Repeated from step 2.

6

• CD

1. The tray rotates.

2. DISC 1 is chucked.

3. The TOC is read.

4. The first track is played for 2 seconds.

5. The last track is played for 2 seconds.

6. The tray rotates.

7. DISC 4 is chucked.

8. The TOC is read.

9. The first track is played for 2 seconds.

10. The last track is played for 2 seconds.

11. Repeated from step 1.

• Display when ended abnormally When the tape deck is abnormal:

The state when ended abnormally is displayed. The contents of display are the same as that during aging.

When the CD player is abnormal:

A message indicating that errors such as “CD MEC ERR” have occurred. Check the error contents in the following error history display mode.

Error History Display Mode

Mode which enables the history of error occurring in the CD player to be checked. Execute this mode after ending the aging mode.

Procedure:

1. Press the "/1 button to turn the set ON.

2. Press the three buttons c/CLOCK SET , ENTER , and CD SYNC simultaneously.

3. A message such as “EMC@@EDC**” is displayed. @@ : Number of mechanical errors (Up to three past errors) ** : Number of errors (NO DISC ERROR) which occurs after chucking (Up to three past errors)

4. When checking the history of mechanical errors, press the PLAY MODE button. When checking errors after chucking, press the REPEAT button to switch the display.

5. Press the "/1 button to end and turn the set OFF.

6. To erase the error history, perform COLD reset. (Press the three buttons c/CLOCK SET , ENTER , and DISC 1 simultaneously.

• Viewing the mechanical error history display

(Switch the history by pressing the PLAY MODE button.)

7

Display

H

g

H

g

E@@M#*****

@@ : Error number. 00 is the newest.

# : Operating state of table

0 : Currently in the INITIAL mode 7 : Currently rotating to the right 8 : Currently rotating to the left A : Currently chucking down B : Currently chucking up

* : Invalid

• Viewing the NO DISC ERROR history display (Switch the history by pressing the REPEAT button.)

Display E@@D##$$%*

@@ : Error number. 00 is the newest

## : Error contents

01: Focus error 02: GFS error 03: Setup error

$$ : Retries

00: NO DISC is determined without attempting chucking retry 02: NO DISC is determined after chucking retry.

% : State when determined as NO DISC 1 : When stopped 2 : At setup 3 : At TOC READ 4 : When accessing 5 : When playing 6 : When pausing 7 : When manual searching (during play) 8 : When manual searching (during pausing) * : Invalid

SELF-DIAGNOSIS

This model has the self-diagnosis function for the VIDEO and AUDIO decoder sections. Immediately after the power on, the self-diagnosis function searches each operation of IC’s around the mechanism control microcomputer (IC701). The results can be checked by D502 of the VIDEO board.

Oscilloscope (Waveform) Symptom

No error

Li

ht

L

MPEG decoder (IC505) error

2 time blinkin

L

[VIDEO BOARD] (SIDE A)

D502

IC505

91

90

65

64

100

1

32

33

MPEG decoder (IC505) or

3 time blinkin

L

DRAM (IC507) error

8

Front Panel

73 72

71 70

69 68

67

64 65 66

SECTION 2

GENERAL

1234567 8 91011121314

15 16 17

74 18 75

19

20

63

60 61

53 54 55

62

58 59

56 57

51 52

50 49

48 47

4179804243444546

40 76

77 78

21 22

23

24 25

26 27 28

29 30

31 32

33

34

35 36 37

38

39

9

LOCATION OF PARTS AND CONTROLS

7

1 "/1 (Power) button and indicator 2 c/CLOCK SET button 3 SLEEP button 4 REC button and indicator 5 DAILY button and indicator 6 TUNING - button 7 TUNING + button 8 Display window 9 ENTER/NEXT button and indicator 10 TUNER MEMORY button 11 STEREO/MONO button 12 TUNING MODE button 13 GEQ control button 14 Remote sensor 15 SYNC EQ button 16 SYNC BASS button 17 SURROUND button and indicator 18 KARAOKE PON button 19 FUNCTION button 20 VOLUME knob 21 Z (A Deck) button 22 Z (B Deck) button 23 PHONES jack 24 h (B Deck) button and indicator 25 H (B Deck) button and indicator 26 x (B Deck) button 27 m (B Deck) button

28 M (B Deck) button 29 X (B Deck) button and indicator 30 z REC (B Deck) button and indicator 31 H SPEED DUB button 32 CD SYNC button 33 . AMS > knob 34 HX (CD) button and indicator 35 x (CD) button 36 m (CD) button 37 M (CD) button 38 DISK SKIP button 39 VIDEO2 INPUT jacks 40 REPEAT button 41 PLAY MODE button 42 DISC 1 button 43 DISC 2 button 44 DISC 3 button 45 DISC 4 button 46 DISC 5 button 47 EDIT button 48 NON-STOP button and indicator 49 FLASH button 50 LOOP button 51 DIRECTION button 52 DOLBY NR button 53 x (A Deck) button 54 m (A Deck) button

55 M (A Deck) button 56 h (A Deck) button 57 H (A Deck) button 58 MIX MIC jack 59 GUITAR jack 60 MIC LEVEL knob 61 GUITAR LEVEL knob 62 SUPER WOOFER MODE button 63 SUPER WOOFER button and indicator 64 FILE MENU button 65 GEQ CTRL button 66 ENTER button and indicator 67 GROOVE button and indicator 68 Equalizer indicators 69 EFFECT button and indicator 70 TUNER/BAND button 71 SPECTRUM ANALYZER button 72 DISPLAY button 73 DEMO (STANDBY) button 74 KEY CONTROL # button 75 KEY CONTROL 2 button 76 RETURN button 77 PREV button 78 NEXT button 79 SELECT button 80 ACTIVE button

• AMS is the abbreviation for Automatic Music Sensor.

Tip

This section is extracted from instruction manual.

If you make a mistake, start over from step 1.

To change the time

The previous explanation shows you how to set the

time while the power is off. To change the time

while the power is on, do the following:

1 Press c/CLOCK SET.

2 Press TUNING +/ – to select SET CLOCK.

3 Press ENTER/NEXT.

explanation.

4 Perform steps 2 through 5 in the previous

the power cord or if a power failure occurs.

Note

The clock setting is canceled when you disconnect

3,51 2,4

10

Step 2: Setting the

time

You must set the time before using the timer

functions.

Press c/CLOCK SET.

1

The hour indication flashes.

Press TUNING +/ – to set the hour.

2

Press ENTER/NEXT.

3

The minute indication flashes.

Press TUNING +/ – to set the

4

minute.

Press ENTER/NEXT.

The clock starts.

5

4Screw(BVTP3x8)

qaScrew(BVTP3x8)

qsFour screws(BVTP3x8)

3Connector

(CN802)

6Flat type wire

(CN431)

7Flat type wire(CN304)

8Flat type wire(CN303)

9Connector(CN452)

0Connector(CN702)

qdFront panel

5Two earth wirs

1Screw(BVTP3x8)

2Earth wire

qh Screw

(BVTP 3x8)

qj Video board

w; Connector (CN301)

wa Bracket (VCD)

qk Flat type wire

(CN501)

ql Flat type wire (CN503)

qg Screw

(BVTP 3x8)

qf Screw (BVTP 3x8)

SECTION 3

DISASSEMBLY

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

3-1. FRONT PANEL AND VIDEO BOARD

3-2. MAIN BOARD

qsFan motor

0Back panel

4Screw(BVTP3x8)

1Two screws(BVTP3x8)

8Three screws(BVTP3x8)

qaTwo screws(BVTP3x8)

7Two screws(BVTP3x8) 6Two screws(BVTP3x8)

9Connector(CN903)

2Flat type wire(CN1)

5Seven screws(BVTP3x8)

3Tuner

qfMain board

qdTwo screws(BVTP3x8)

11

3-3. SUB PANEL

y

)

d

1Three screws (BVTP2.6x8)

7Screw (BVTP2.6x8)

2Ornamental plate

3Connector (CN812)

8Four screws (BVTP2.6x8)

Claw

4Connector (CN703)

5Five screws (BVTP2.6x8)

9Front input boar

3-4. CD LID ASSEMBLY

2Spring(CD lid)

0Sub panel block

6Screw

(BVTP2.6x8)

3-5. TAPE MECHANISM DECK AND CASSETTE LID

qfHolder(deck A)

qdSpring(deck A)

qaSpring(deck B)

9Spring(TC- lid)

3 Sab panel assembly

1CD lid assembl

qsHolder(deck B)

4Mechanism deck

1Two screws(BVTP3x8)

2Screw(BVTP3x8)

7Screw

(BVTP3x8)

12

5Two screws (BVTP3x8)

3Screw(BVTP3x8

6Screw(BVTP3x8)

0Bracket

8Spring(TC- lid)

3-6. CD MECHANISM DECK 3-7. BASE UNIT

t

1Five screws (BVTP3x8)

2CD mechanism

deck

3Base uni

2Boss

1Yoke fitting

3-8. DISC TABLE

Note:

When the disc table is installed, adjust the positions of roller cam and mark B as shown in the figure, then set to the groove of disc table.

A

2Screw (BVTP3X8

3Bracket (BU)

4Stop screw

1Screw (BVTP3X8)

5Disc table

A

13

SECTION 4

TEST MODE

VIDEO CD COLOR-BARS MODE

On this mode, the data of the color-bars signal as a picture signal and the 1kHz sine wave signal as a sound signal are output by the mechanism control microcomputer (IC502) for video CD signal check. When measurement of the voltage and waveform on the VIDEO board, perform it in this mode. For reference, the color-bars signal can be observed at J302 (VIDEO OUT) and the sound signal can be observed at J101 (VIDEO/MD (AUDIO) OUT) using an oscilloscope.

1. Connect the lead wire to both ends of the land of SL503 of the VIDEO board.

2. Turn the power on. Press FUNCTION button to select CD.

3. After 2 or 3 seconds later, connect the lead wire.

4. After measuring, remove the lead wire connected.

[VIDEO BOARD] (SIDE A)

D502

SL502

SL503

IC505

SL501

TEST MODE

[VIDEO BOARD] (SIDE B)

SL503

TEST

MODE

SL502 SL501

IC502

CT503

VIDEO FREQUENCY

IC507

14

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

3.04 – 6.96 N • m (31 to 71 g • cm)

(0.43 – 0.98 oz • inch)

0.20 – 0.58 N • m

(2 to 6 g • cm)

(0.02 – 0.08 oz • inch)

3.04 – 6.96 N • m (31 to 71 g • cm)

(0.43 – 0.98 oz • inch)

0.20 – 0.58 N • m

(2 to 6 g • cm)

(0.02 – 0.08 oz • inch)

6.97 – 14.02 N • m (71 to 143 g • cm)

(0.98 – 1.99 oz • inch)

0.98 N • m or more

(100 g or more)

(3.53 oz or more)

0.98 N • m or more

(100 g or more)

(3.53 oz or more)

DECK SECTION 0 dB=0.775V

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 adjusted.

4. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.)

6. The adjustments should be performed for both L-CH and R-CH.

7. Switches and controls should be set as follows unless otherwise specified.

Signal

P-4-A100

WS-48B

P-4-L300

10 kHz, –10 dB

3 kHz, 0 dB

315 Hz, 0 dB

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 (10kHz, –10dB)

set

main board CN301 Pin 1 (R-ch) Pin 3 (L-ch)

Used forTape

Azimuth Adjustment

Tape Speed Adjustment

Level Adjustment

level meter

+ –

2. T urn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1 dB of peak.

L-CH peak

screw position

R-CH peak

output level

within 1 dB

L-CH peak

R-CH peak

within 1dB

screw position

15

3. Mode: Playback Tape Speed Adjustment (Deck A)

)

test tape P-4-A100 (10kHz, –10dB)

set

main board CN301 Pin 3 (L-ch)

Pin 2 (GND)

L

R

oscilloscope

Note: Set the test mode using the following method and begin tape

speed adjustment. In the test mode, the speed will switch to double speed or normal speed each time the HI-SPEED DUB button is pressed.

Procedure:

With the power turned ON, press the c/CLOCK SET button, ENTER button, and DISC 3 button simultaneously. (The “VOLUME” on the fluorescent display tube will blink while

Pin 1 (R-ch)

in the test mode.) To exit the test mode, press the "/1 button.

Waveform of oscilloscope

in phase 45°

good

90°

135°

180°

wrong

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

Adjustment Location: Playback Head (Deck A)

Record/Playback/Erase Head (Deck B)

Remove the cassette lid.

Reverse Foward

1. Insert the WS-48B into deck B.

2. Press the H button of deck B.

3. Press the HI-SPEED DUB button and play the tape at double speed.

4. Adjust RV1001 of the LEAF SW board so that the reading of the frequency counter becomes 6000 ± 180 Hz.

5. Press the HI-SPEED DUB button and play the tape at normal speed.

6. Adjust RV1002 of the LEAF SW board so that the reading of the frequency counter becomes 3000 ± 90 Hz.

Adjustment Location: LEAF SW board

Sample Value of Wow and flutter

W.RMS (JIS) less than 0.3% (test tape: WS-48B)

Playback Level Adjustment (Deck A, Deck B)

Procedure:

Mode: Playback

test tape P-4-L300 (315Hz, 0dB)

set

main board CN301 Pin 1 (R-ch) Pin 3 (L-ch)

level meter

16

Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L-CH) and RV401 (R-CH) so that adjustment within the following adjustment level.

Adjustment level:

CN301 playback 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

Adjustment Location [LEAF SW BOARD]

RV1001(High Speed) RV1002(Normal Speed

RV1002 RV1001

Record Bias Adjustment (Deck B)

AF OSC

VIDEO 1 (AUDIO) IN 315Hz 50 mV (–23.8 dB)

blank tape CS-123

set

attenuator

600 Ω

Record Level Adjustment (Deck B)

Procedure:

INTRODUCTION

When set to the test mode performed in Tape Speed Adjustment, 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 1. (After recording, press the m button without stopping will return to the position where recording was started.)

1. Press FUNCTION button to select VIDEO 1. (This step is not necessary if the above test mode has already been set.)

2. Insert a tape into deck B, press the z REC button, and then press the H button to start recording.

3. Mode: Record

VIDEO 1 (AUDIO) IN

1) 315 Hz

2) 10 kHz

AF OSC

attenuator

600 Ω

} 50 mV (–23.8 dB)

blank tape CS-123

set

Procedure:

INTRODUCTION

When set to the test mode performed in Tape Speed Adjustment, 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 1. (After recording, press the m button without stopping will return to the position where recording was started.)

1. Press FUNCTION button to select VIDEO 1. (This step is not necessary if the above test mode has already been set.)

2. Insert a tape into deck B, press the z REC button, and then press the H button to start recording.

3. Mode: Record

4. Mode: Playback

recorded position

set

main board CN301 Pin 1 (R-ch) Pin 3 (L-ch)

level meter

5. Confirm playback the signal recorded in step 2 become adjustment level as follows. If these levels do not adjustment level, adjust the R V341 (L-CH) and R V441 (R-CH) on the AUDIO board to repeat steps 3 and 4.

Adjustment level: The playback output of 10 kHz level difference

against 315 Hz reference should be ± 1.0 dB.

Adjustment Location: AUDIO board

Adjustment Location:

[AUDIO BOARD] (Conductor Side)

RV341(Lch),RV441(Rch) Record Bias

RV311(Lch),RV411(Rch) Playback Level (Deck A)

4. Mode: Playback

recorded position

set

main board CN301 Pin 1 (R-ch) Pin 3 (L-ch)

level meter

5. Confirm playback the signal recorded in step 2 become adjustment level as follows. If these levels do not adjustment level, adjust the R V301 (L-CH) and R V351 (R-CH) on the MAIN board to repeat steps 3 and 4.

Adjustment level:

CN301 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)

Adjustment Location: MAIN board

[MAIN BOARD] (Conductor Side)

RV301 RV401

RV441 RV341

RV301(Lch),RV401(Rch) Playback Level (Deck B)

RV311

RV411

Record Level (Lch)

CN301

3 1

IC301

RV351 Record Level (Rch)

RV301

43

42

29

56

28

1

15

14

17

CD SECTION

Note:

1. CD Block is basically constructed 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 10MΩ 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.

Note: Clear RF signal waveform means that the shape “◊” can be

clearly distinguished at the center of the waveform.

RF signal waveform

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

level : 1.75 ± 0.25 Vp-p

S Curve Check

oscilloscope

BD board

TP (FE) TP (VC)

+

–

Adjustment Location: BD board

Procedure :

1. Connect the oscilloscope to test points TP (FE) and TP (VC).

2. Connect TP (FEI) and GND, and TP (AGCCON) and GND of the BD board with lead wires.

3. Press the "/1 button to turn the set ON.

4. With the disc (YEDS-18) loaded, press the 7 button and perform focus search. (Focus search will be performed in the same way even while the disc table is pushed in and out.)

5. Check the symmetry and peak to peak level of the oscilloscope waveform (S curve) at this time.

S-curve waveform

symmetry

A

Within 4.0 ± 1.0 Vp-p

B

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.

Adjustment Location: BD board

E-F Balance (Traverse) Check

oscilloscope

BD board

TP (TE) TP (VC)

+

–

Adjustment Location: BD board

Procedure :

1. Connect oscilloscpe to test point TP (TE) on BD board.

2. Short-circuit SL502 of the video board to GND.

3. Turned Power switch on. Press FUNCTION button to select CD.

4. Put disc (YEDS-18) in to play the number five track.

5. Press the PLAY MODE button. (The tracking servo and the sledding servo are turned OFF.)

6. Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following : A/B x 100 = less than ± 22%

Traverse waveform

Center of the waveform

B

0V

level : 1.3 ± 0.6 Vp-p

A (DC voltage)

7. Press the PLAY MODE button. (The tracking servo and sledding servo are turned ON.) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 7.

RF Level Check

oscilloscope

BD board

TP (RF) TP (VC)

+

–

Procedure :

1. Connect oscilloscope to test point TP (RF) and TP (VC) on BD board.

2. Connect TP (AGCCON) and GND of the BD board with lead wires.

3. Press the "/1 button to turn the set ON.

4. Put disc (YEDS-18) in and playback 5track.

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

6. After check, remove the lead wire connected in step 2.

18

Traverse waveform

0V

Tracking servo Sled servo OFF

Tracking servo Sled servo ON

8. Desolder the short-land (SL502) short-circuited at step 2.

Adjustment Location: BD board

C (DC voltage)

SECTION 7

r

TP (VC)

TP (RF)

TP (TE)

TP (IOP)

TP (FE)

TP (AGCCON)

BD board

MIC board

TC-A board

TC-B board

PANEL-FL board

PANEL-VR board

HEADPHONE board

LED board

CD MOTOR board

TABLE SENSOR board

TUNER UNIT

TRANS board

MAIN board

FRONT INPUT board

CD-R board

CD-L board

PA board

AUDIO board

LEAF SW board

VIDEO board

DIAGRAMS

HCD-LV80

Adjustment Location :

[ BD BOARD ] — SIDE B —

7-1. CIRCUIT BOARDS LOCATION

VIDEO SECTION

Frequency adjustment

1. Connect the frequency counter to check point of the VIDEO board.

2. Adjust CT503 of the VIDEO board so that the frequency counter read 27MHz ± 80Hz at STOP condition.

Adjustment Location :

[ VIDEO BOARD ] – SIDE A –

D502

SL502

SL501

TEST MODE

FREQUENCY

SL503

(27MHz)

CT503 VIDEO

(GND)

IC505

IC507

frequency counte

VIDEO board (27 MHz)

[ VIDEO BOARD ] – SIDE B –

SL503

TEST

SL502

MODE

SL501

(27MHz)

(GND)

IC502

IC506

+ –

19

HCD-LV80

7-2. BLOCK DIAGRAMS

– BD SECTION –

OPTICAL PICK-UP BLOCK

(KSS-213D/Q-NP)

DETECTOR

E

A

C

D

B

F

VCC

VC

A

C

D

B

IC781

CD DIGITAL

IC101

IC103

RF AMP

A

5

C

7

D

8

B

6

RF

SUMMING

AMP

FOCUS

ERROR

AMP

RF EQ

AMP

RFD

RFI

FE

16

17

14

INTEG-

RATOR

DIGITAL SERVO

DIGITAL SIGNAL PRCESSOR

RF AC

50

ASYI

49

ASYO

48

ASYMMETRY CORRECTION

DEMODULATOR

DIGITAL

PLL

EFM

32K RAM

REGISTER

SUB CODE

PROCESSOR

DATA BUS

ERROR

CORRECTOR

D/A

INTERFACE

DIGITAL

OUT

MD2

D OUT

PCM-D

BCLK

LRCK

C2PO

MUTE

63

D+5V

64

66

67

65

14

3

OPTICAL

1

OUT

DOUT

ADATA

BCLK

LRCK

C2PO

MUTE

LD

PD

TRACKING

FOCUS

COIL

LASER

DIODE

LD

POWER

M102 SLED

MOTOR

M101

SPINDLE

MOTOR

E

F

LD

DRIVE

Q101

T+

T

F+

F

SD+

M

SD

SP+

M

SP

E

11

F

10

LD

3

PD

4

FOCUS/TRACKING COIL DRIVE

SPINDLE/SLED MOTOR DRIVE

12

11

14

13

17

18

15

16

IC102

APC LD

AMP

TRACKING

ERROR

AMP

5

6

2

3

24

23

25

27

TFDR

TRDR

FFDR

FRDR

SFDR

SRDR

BUFFER

21

VC

REF

LD ON

TE

13

DIGITAL

CLV

IC104

4

A+5V

(XTAL 33.8MHz)

MCK

2

CTRL1

SENS

DATA

XLT

CLK

SCOR

SUBQ

SQCK

SCLK

LPH

XRST

LD ON

• SIGNAL PATH

: CD

: VIDEO

: Digital out

A

VIDEO

SECTION

(Page 24)

CLOCK

12

VC

38

INTEG-

RATOR

VC

RFDC

43

FE

39

TE

41

CE

42

VC

SE

40

TFDR

31

TRDR

32

FFDR

33

FRDR

34

SFDR

29

SRDR

30

MDP

25

OP AMP

ANALOG SW

PWM

GENERATOR

TRACKING

PWM

GENERATOR

FOCUS

PWM

GENERATOR

SLED

PWM

GENERATOR

CONVERTER

22

A/D

CONTROL SIGNAL

BLOCK

SERVO

BLOCK

SERVO DSP

TRACKING

SERVO

FOCUS

SERVO

SLED

SERVO

DETECTOR

MIRR DFCT

FOK

GENERATOR

SERVO

AUTO

SEQUENCER

SERVO

INTERFACE

CPU

INTERFACE

XTAI

XTSL

SENS

DATA

XLAT

CLOK

SCOR

SQSO

SQCK

S STOP

SCLK

XRST

71

69

7

4

5

6

15

76

77

26

S101

LIMIT SW

8

82

XRST

20

MUTE

S201

(UP SWITCH)

M201

TABLE

MOTOR

DISC

SENSOR

IC202

IC201

MOTOR DRIVER

OUT 2

IN 2

3

1

M

OUT 1

7

IN 1

9

TRAY SENS

UP SW

TBL-R

TBL-L

C

MAIN

SECTION (2/2)

(Page 23)

09

20

+5V

D201

(DISC No.)

LED SW

Q201

LED

– DECK SECTION –

HCD-LV80

HP101 PB HEAD (DECK A)

REC/PB HEAD

(DECK B)

HRPE101

ERASE HEAD

PB A/B

MS OUT

TC PB L

LM ON/OFF

NORM/HIGH

NR ON/OFF

REC/PB/PASS

TC REC L

BIAS ON/OFF RM ON/OFF

ALC ON/OFF

RELAY

CAPM CNT1

CAPM CNT2

CAP M H / L

A SHUT

B

MAIN (1/2), (2/2)

SECTION

(Page 22, 23)

17

2

DOLBY NR

RECOUT

D

32

S1008

B CrO

2

19

B NORM/CROM/

METAL

PAS

DOL

BIAS SW

M

31, 33

M1

CAPSTAN

MOTOR

DOLBY TYPE B

CN301

3

R CH

28

27

M

MS

26

PB OUT

LM ON/

OFF

NORM/

HIGH

NR ON/

OFF

PB

LIN

BIAS ON/OFF

RM ON/OFF

ALC ON/OFF

CAP MOTOR CONTROL Q336-343

CONTROL

RV1002

NORMAL

SPEED

Q1001

40

25

18

23

24

43

20 22 15

RV1001

HIGH

SPEED

1

SWITCH

Q335

REEL

DETECT

IC1001

S1004 A CrO

RV311

4

PLAYBACK

LEVEL

DECK A

RV301

PLAYBACK

LEVEL

DECK B

RV341

REC BIAS

BIAS OSC

T621, Q621, 622

IC611

L

R

L

R

X

R CH

3

P

ERASE BIAS

IC601

1

IC602

R

REC/PB

16

PB-A/B

A IN

48

B IN

46

RV301

REC LEVEL

+7.5V

Q623

EQIN

38

EQOUT

36

A 120/70

70

120

DOLBY NR IC301

39

REEL

DETECT

IC1002

S1001 (A PLAY)

• R CH : Same as L ch

• SIGNAL PATH

+5V

S1002 (B PLAY)

: PB (DECK A) : PB (DECK B) : REC (DECK B)

09

• PLUNGER SOLENOID is supplied as the MECHANICAL BLOCK ASSY.

A DECK/ B DECK PLUNGER

TRIGGER MOTOR CONTROL Q331-334

S1003

(A HALF)

S1005

(REC A)

S1006

(B HALF)

S1009

(REC B)

+5V

B SHUT

A PLAY

B PLAY

A HALF

B HALF/REC A/REC B

B TRIG

A TRIG

21

HCD-LV80

– MAIN (1/2) SECTION –

VIDEO 2

IN

VIDEO

SECTION

(Page 24)

DECK

SECTION

(Page 21)

VIDEO

SECTION

(Page 24)

POWER SECTION

(Page 25)

O

VIDEO

IN

PHONO

(L IN)

FM/AM TUNER TUNER UNIT IS SUPPLED AS THE ASSEMBLED BLOCK

B

M

MD (L IN)

Q

V1, AU

(L IN)

V2, AU,

L-CH IN

TC PB L

MIC-SIG

J804

J702

J701

ST-L

CD-L

J701

J804

IC191

AV SWITCH

6

IN3

8

IN4VCD VIDEO

IN1

1

B

A

2 3 5

46 45 28

IC181 SELECTOR

12

X0

X1

14

A

10 9

46 45

X

B

VD OUT

13

J702

SPEANA

J701

L-CH SIG

TC REC L

VIDEO

OUT

MD OUT

D

E

B

DISPLAY

SECTION

(Page 26)

POWER

SECTION

(Page 25)

DECK

SECTION

(Page 21)

10

IC101

C

IC601

PHONO AMP

3

1

SOUND PROCESSOR 1

69

IN A2

IN B2

68

IN C2

67

IN D2

66

65

IN E2

MIC IN

2

64

IN F2

33 3234

L+R

REC B2

BUS OUT2

REC A2

BBA2

BBB2

BUF IN2

CLOCKDATALATCH

30

57

36

Q111

TC REC L

SWITCH

Q112

7

58

39

38

SWITCH

37

SWITCH

Q115

34

484738

MUTE

SWITCH

Q113

• R CH: Same as L ch

• SIGNAL PATH

: FM : CD : PB : REC : VIDEO/MD : VIDEO

09

MUTE

SWITCH

Q803

D807

RESET

SWITCH

Q802

MUTE

SWITCH

Q804

22

6

3

LINE-MUTE

F-RELAY

MAIN CONTROL

IC501 (1/2)

FUNC-SEL1

RESET

12

RESET

SWITCH

Q801

RESET

IC801

22

DBFB-H/L

V-MUTE

SW-MODE

493-LAT

493-DATA

D805

+5v

7

28

34

38

45

46

46FUNC-SEL0

47

48

48493-MUTE

DISPLAY

22AC-CUT

RESET

DBFB

F-RELAY

G

F

SECTION

(Page 26)

POWER

SECTION

(Page 25)

– MAIN (2/2) SECTION –

HCD-LV80

N

VIDEO

SECTION

(Page 24)

H

POWER

SECTION

(Page 25)

P

VIDEO

SECTION

(Page 24)

C

BD

SECTION

(Page 20)

B

DECK

SECTION

(Page 21)

FM/AM TUNER TUNER UNIT IS SUPPLED AS THE ASSEMBLED BLOCK

2

I

C CLK

2

C DATA

I

FAN DET

HP.SW

X-RST

TRAY.SENS

TBL.L

TBL.R

UP SW

LED

B TRG

A TRG CAPM-CNT 2 CAPM-CNT 1

CAP-M-H/L

MS OUT

LM ON/OFF

REC/PB/PASS

NR ON/OFF RM ON/OFF

BIAS ON/OFF

NORM/HIGH

PB A/B

ALC ON/OFF

B PLAY A PLAY

B-HALF/REC A/REC B

A-HALF

B SHUT A SHUT

RELAY

ST-MUTE

STEREO

TUNED

ST-CE

ST-DOUT

ST-DIN

ST-CLK

IC931

29

30

MAIN CONTROL

36 H/P IN

XRST

59

IC501 (2/2)

STK-POWER

PROTECT

FL OFF

STBY RELAY

HP MUTE

WAKE UP

IIC-CLK

IIC-DATA

1

27

42

43

93

18

29

30

43 42 93

1

27

30 29 18

LX7

POWER ECO HP MUTE

STK POWER PROTECT

DATA CLOCK

WAKE UP

I

POWER

SECTION

(Page 25)

J

DISPLAY SECTION

+UNREG, 17V

UN–12V

+10V

1 3

REG

IC932

+12V

1 3

REG

IC951

–7V

2 3

REG

(Page 26)

61

DISC-SENS

63

TBL-L

65

TBL-R

68

ENC 3/UP-SW ENC 2/DISC-LED

69

72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91

100

49 50 51 52 53 54 55

B-TRG A-TRG CAPM-CNT 2 CAPM-CNT 1 CAP-M-H/L AMS IN TC-MUTE R/PB/PAS NR-ON/OFF REC-MUTE BIAS EQ-H/N PB-A/B ALC B-PLAY-SW A-PLAY-SW A-HALF B-HALF B-SHUT A-SHUT TC-RELAY

ST-MUTE STEREO TUNED ST-CE ST-DOUT ST-DIN ST-CLK

XC-IN

XC-OUT

X-OUT

X-IN

POWER

CD-POWER

32.768kHz

10

11

13

15

2

5

X501

X502

16MHz

UN+12V

IC901

+7V

1 3

REG

Q902 SWITCH

IC911

+5V

1 3

REG

Q914

SWITCH

5

IC921

DETECTOR

Q905

SWITCH

2

SWITCH

2

Q931

Q903

Q911

Q932 SWITCH

Q904 SWITCH

Q912 SWITCH

Q911

SWITCH

2

Q913

SWITCH

FAN SWITCH

Q961, 963

IC933

+7V

1 3

REG

Q912 SWITCH

(LED+7V)

(D+5V SW)

(CD D+5V SW)

(CD A+5V SW)

PL A+10V

ST +10V

M901

FAN

TC MOTOR+12V

M+7V (UNSW)

7V

ST A-7V

LED-7V

TC–7V

–7V

ST A+7V

LED+7V

TC+7V

+7

LED 5V

EVER +5V

D+5V UNSW

5V

AU D+5V

EVER +5V

D+5V (SW)

A+5V (SW)

L

POWER

SECTION

(Page 25)

+5V

1 3

REG

09

• R CH : Same as L ch

23

HCD-LV80

– VIDEO SECTION –

A

CD

SECTION

(Page 20)

09

ADATA

BCLK LRCK

C2P0

DATA

XLT

CLK

SENS SCLK

MUTE

CTRL1

LPH

LDON

SCOR SUBQ SQCK

XRST

MCK

(XTAL 33.8MHz)

1

13

5

LEVEL SHIFT

IC501

DATAI

DATAO CLK1 HRDY

INT HSEL

RST

INVERTER

CLK1, DATA0

DATA0 DATAI CLK1 INT HSEL HRDY RESET

Q502

D-RAM

IC507

RAS

UCAS

LCAS

A0

RASO

16 - 19 22 - 26

CAS

13 14 28 29

38 42 40

MWE WE

4

10

8

4

CD-DATA

3

CD-BCK

CD-LRCK

5

6

CD-C2P0

112

HD-OUT

119

HD-IN

117

HCK HRDY

113 114

HINT

121

HSEL

60

RESET

PGIO2/VSYNC/CSYNC

93

31

DATA1O

32

DATA1I

33

CLK1 CL680 INT

20 21

CL680 HSEL

23

CL680 HRDY

24

680 RESET

45

BUS

DSP DATA

3

DSP LATCH

4 5

DSP CLK

1

SENSE SENSE CLK

2

10

DSP MUTE

11

CTRL1(L:DOUBLE)

27

CTRL2

28

LDON

18

SCOR

36

SUBQ DATA

SUBQ CLK

37

DEVICE RESET

77

A8

DQ1

2 - 10 31 - 39

VIDEO CD CONTROL

IC502

DQ16

VIDEO/CD DECODER

SHARPNESS

DF LATCH

A7

XIN

XOUT

NT/PAL

TEST LED

XRESET

2

C.DATA

I

2

I

C.CLK

O0

13 - 15 17 - 21

IC505

34

22

65

15

13

93

73

12

30 29

X501

10MHz

+5V

O7

10 - 29

MD0

D502

ROM

IC506

A11

25 4 28 29 3 2 14 10 12 - 5 27 26 23

I

MD15

S501

SYSTEM

SELECT

A17

NTSC

AUTO

PAL

A0

58 - 44

I

MA0

MA10

Y-OUT

C-OUT

DA-DATA DA-LRCK

DA-BCK

VCK-IN

DA-XCLK

A10

CE

22

37

MCE

OUTPUT AMP

IC401

69

75

110

108

111 106 86

BUFFER

Q301

27MHz

TRAP

Q302,306,307

BUFFER

Q303,304

DATA0

CLK1

MIX AMP

Q308,310

DIGITAL FILTER & D/A CONVERTER

18 19 17

9 8 7

IC509

D/A

CONV

MODE

10 21 20 4

RSTB

5

3

PLM

CLOCK

DIVIDER

14

11

24

3

11

1

3.3V REG Q531

7

1

LEVEL SHIFT

R-CH

IC504

MUTE

Q454

X503

27MHz

CT503

VIDEO

FREQUENCY

+3.3VD5V

12

6 8

MUTE

Q453

AMP

IC101

27MHz

384FS 768FS

VCD VIDEO

4

132

13

CD-L

(L - CH)

J301

S VIDEO OUT

M

MAIN (1/2)

SECTION

O

(Page 22)

I2C.DATA

2

I

C.CLK

X-RST

N

P

MAIN (1/2)

SECTION

(Page 22)

MAIN (2/2)

SECTION

(Page 23)

MAIN (2/2)

SECTION

(Page 23)

• R CH: Same as L ch

• SIGNAL PATH

: CD : CHROMA :Y : VIDEO

24

– POWER SECTION –

HCD-LV80

MAIN (1/2)

SECTION

(Page 22)

MAIN (1/2)

SECTION

(Page 22)

MAIN (2/2)

SECTION

(Page 23)

G

E

L

MIC 1

MIC 2

J801

J802

DBFB

F-RELAY

L-CH IN

EVER +5V

HP-MUTE

POWER AMP & VOLUME CONTROL

18

D804

HEAD PHONE

MUTE

Q833

IC801

MIC AMP

IC850 (1/2)

MUTE

CONTROL

Q834

VOLUME

CONTROL

3

6

MIC LEVEL

RV750

4

11

TH831

VOLUME

CONTROL

D802, 852

THERMAL

SENSOR

Q831-832

ECHO CONTROL

1

LPF 1 IN

LPF 2 IN

9

11

OP 2 IN

PROTECT

DC AMP

Q433-434

L-CH THERMAL

PROTECT SWITCH

Q801

IC851

R-ch

LPF 1 OUT

LPF 2 OUT

OP 2 OUT

LATCH

DRIVER

Q432

ECHO LEVEL

RV751

2

8

10

RELAY

DRIVER

Q401-402

LATCH

DRIVER

Q437

PROTECT

SWITCH

Q439

MIC AMP

IC850 (2/2)

RY401

PROTECT

SWITCH

Q431

MUTE

SW

Q805

FAN DETECTOR

D405

R-CH

MIC-SIG

J803

PHONES

HP.SW

FAN DET

TM401

L

FRONT

R

K

Q

H

DISPLAY

SECTION

(Page 26)

MAIN (1/2)

SECTION

(Page 22)

MAIN (2/2)

SECTION

(Page 23)

MAIN (2/2)

SECTION

(Page 23)

09

I

STK-POWER

• R CH : Same as L ch

• SIGNAL PATH

: FM

PROTECT

MUTE DRIVE

Q804

MUTE

SWITCH

Q803

VF (–35V)

SWITCH

Q908

–35V REG

Q903

+VH

RECT D831

+UNREG. 12V

UN +10V

UN –10V

AC-L

RECT

D833-836

RECT

D841-844

RECT

D832

VF

POWER

TRANSFORMER

T951

230V

120V

240V

JW971

F951

VOLTAGE

SELECTOR

VS901

AC

IN

25

HCD-LV80

– DISPLAY SECTION –

(Page

F

22)

MAIN (1/2) SECTION

MAIN (2/2) SECTION

(Page

23)

J

RESET

DATA

CLOCK

WAKE UP

(Page 25)

K

POWER SECTION

MAIN (1/2) SECTION

MIC–SIG

SPEANA

D

(Page 22)

X601

12.5MHz

REC LEVEL

OUTPUT

DISPLAY CONTROL (FOR MIC)

IC603

LINE NF LINE IN REC IN REC NF

REC LEVEL

F06 F05 F04 F02 F01

3 4 6 5

DISPLAY CONTROL

IC601

REMOTE

1

SIRCS

2

JOG A

8

JOG B

3

LED SCK

LED DAT

D-SW

LED SEL

KEY 0

KEY 4

REC LED LED-EC0

GR-1 GR-15 GR-16

4 5

80

7

9

10

11

15

74 75 77

43 28 27

LED LATCH

70

X IN

X OUT

72

73

RESET

2

78

C DATA

I

2

79

C CLK

I

22

WAKE UP

VOLUME A VOLUME B

11 12 13 14 16 17

21 20 19 18 17 16

ALL BAND BPF 4 BPF 3 BPF 2 BPF 1 BPF 0

SEG-1

45 67

DAILY LED

23

GR-3 14, 2

29VF40, 42

CONTROL

RECIEVE

IC702

S701

JOG

. AMS >

S691

Z

OPEN

Q601 – Q603

LED POWER

SWITCH

S701

VOLUME

KEY MATRIX

Q605 – Q607 LED DRIVER

Q608 – Q610

DRIVER

14

CLK

15

STB

13

DATA

D601 – D603

SERIAL

PARALLEL

CONVERTER

IC701

+5VH

+5VL

D604 – D607, D611, D612, D615 – D621, D623 – D627, D635 – D638

1

P3

•

3

P5

•

5

P7

•

7

P9

11

P16

•

20 22

P1

17

•

P2

19

D631, D632, D641

D700

FLUORESCENT INDICATOR TUBE

09

FL601

26

HCD-LV80

APPROX 200mVp-p

2.5V

4.8Vp-p

33.8MHz

2.8Vp-p

33.8MHz

3.8Vp-p

27MHz

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)

For schematic diagrams.

Note:

• 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.

f

•

: internal component.

• 2 : nonflammable resistor.

• 1 : fusible resistor.

• C : panel designation.

Note: The components identified by mark 0 or dotted line

with mark 0 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

under no-signal (detuned) conditions.

• Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances.

• Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : FM g : VIDEO/MD E : PB (DECK A) d : PB (DECK B) G : REC (DECK B) m : CHROMA n : Y o : VIDEO J : CD c : digital out I : PHONO

• Abbreviation EA : Saudi Arabia model. SP : Singapore model. MY : Malaysia model.

4

W or less unless otherwise

• Indication of transistor

B

CE

B

CE

C Q

These are omitted

EB

These are omitted.

WAVEFORMS – CD SECTION –

1

IC101 t; RF AC

2

APPROX 500mVp-p

IC101 ra TE

3

IC101 el FE

4

7.5µsec

IC101 wg MDP

1.3Vp-p

2.6Vp-p

2.5V

– VIDEO SECTION –

1

10MHz

IC502 qd XOUT

2

H

IC505 ug COUT

3

2Vp-p

H

IC505 yl YOUT

4

H

Q303 E COUT

5

2Vp-p

H

IC401 4 YOUT

6

5.8Vp-p

27MHz

IC509 1 XT1

– MAIN (2/3) SECTION –

4Vp-p

1Vp-p

7

4.6Vp-p

44.1kHz

IC509 ql LRCK

8

4.8Vp-p

2.11MHz

IC509 qj BCLK

9

IC504 8 384FS

0

IC504 6 27M

qa

IC504 qs

For printed wiring boards.

Note:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

a

•

• 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 the (Side B) pattern face are indicated. Parts face side: Parts on the parts face side seen from the (Side A) parts face are indicated.

: Through hole.

27

1

5.5Vp-p

16MHz

IC501 qd XC-OUT

2

5.2Vp-p

32.768kHz

IC501 qa X-OUT

– PANEL FL SECTION –

1

3.4Vp-p

12.5MHz

IC601 us X OUT

27

HCD-LV80

7-3. PRINTED WIRING BOARD – BD SECTION –

• See page 19 for Circuit Boards Location.

(Page 32)

28