Sony HCD-LV80 Service manual

Inputs

PHONO IN (phono jacks): MIC 1/2 (phono jack):

HCD-LV80

SERVICE MANUAL

E Model

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

		Model Name Using Similar Mechanism	HCD-VR50/VR70
CD
		CD Mechanism Type	CDM37L-5BD34L
SECTION
		Base Unit Type	BU-5BD34L
		Optical Pick-up Type	KSS-213D/Q-NP
TAPE DECK		Model Name Using Similar Mechanism	NEW
SECTION		Tape Transport Mechanism Type	TCM-230PWR12

Amplifier section

The following measured at AC 120/220/240 V, 50/60 Hz

DIN power output (Rated)

240 + 240 watts

(4 ohms at 1 kHz, DIN) Continuous RMS power output (Reference)

300 + 300 watts

(4 ohms at 1 kHz, 10 % THD)

sensitivity 3 mV, impedance 47 kilohms 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, impedance 47 kilohms

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

Outputs

PHONES (stereo phone jack):

accepts headphones of 8 ohms or more

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

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

SPECIFICATIONS

FRONT SPEAKER :

accepts impedance of 4 to 16 ohms

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):

Y: 1 V p-p, unbalanced, Sync negative,

C: 0.286 V p-p,

load impedance 75 ohms

VIDEO CD/CD player	section
System	Compact disc, digital
	audio and video system
Laser	Semiconductor	laser
	(λ = 780 ohm), Emission
	duration : continuous
Laser output	Max. 44.6 µW*
	* 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.
Wavelength	780 - 790 nm
Frequency Response	2 Hz - 20 kHz (±0.5 dB)

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
		NTSC, PAL
Wave	length:	660 nm
Output	level:	–18 dBm

Tape player section

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

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

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

— Continued on next page —

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

AM tuner		section
Tuning	range
Middle	Eastern models:		531 - 1,602 kHz (with		the
			tuning interval set at
			9 kHz)
Other models:			531 - 1,602 kHz (with the
			tuning interval set at
			9 kHz)
			530 - 1,701 kHz (with		the
			tuning interval set at
			10 kHz)
Antenna			AM loop antenna,
			External antenna
			terminals
Intermediate		frequency	450 kHz
General
Power	Requirements		120 V, 220 V, or 230 - 240
			V AC, 50/60 Hz
			Adjustable with	voltage
			selector
Power	Consumption
			300 watts
Dimensions(w/h/d)			Approx. 356 × 423 × 446
			incl. projecting parts		and
			controls
Mass
			Approx. 15.9 kg
Supplied Accessories			AM loop antenna	(1)
			FM wire antenna	(1)
			Speaker cords (2)
			Remote (1)
			R6(size AA) batteries		(2)
			Video connecting	cable
			(1)
Design	and specifications		are subject to change
without	notice.

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 0OR 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 —

Parts No.

MODEL		PARTS No.
MY, SP model		4-227-751-2s
EA model		4-227-751-3s
• Abbreviation
SP	: Singapore model
EA	: Saudi Arabia model
MY	: Malaysia model

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 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				button and	"/1	button simultaneously.
			LOOP
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.With 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

button to switch the function to “CD”.

FUNCTION

6.

Press the three buttons

,

, and

button simultaneously.

c/CLOCK SET

ENTER

DISC 4

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.

• Tape 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. “TAPE 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. “TAPE 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. “TAPE 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. “TAPE 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

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

[VIDEO BOARD] (SIDE A)

H

D502

L

No error

Light

100

91

1

90

H

MPEG decoder (IC505)

IC505

32

65

L

error

33

64

2 time blinking

H

MPEG decoder (IC505)

L

or

3 time blinking

DRAM (IC507) error

8

SECTION 2

GENERAL

Front Panel

				1	2	3		4	5	6		7		8	9		10		11 12	13	14
																																			15
																																			16
																																			17
			73																																74
																																			18
			72																																75
			71																																19
			70
			69
			68																																20
			67
64	65			66
			63
60	61 62
																					21														22
58			59
																																			23
	56			57																															24				25
53	54		55																													26			27						28
																																			29				30
51	52
																															31				32
																																			33
			50																																34
			49																							35									36						37
			48																																38
			47
																																			39
									46	45		44		43	42				80 79	41 40	76
																					77
																					78

9

LOCATION OF PARTS AND CONTROLS

1	"/1(Power) button and indicator	28	M(B Deck) button	55	M(A Deck) button
2	c/CLOCK SET button	29	X(B Deck) button and indicator	56	h(A Deck) button
3	SLEEP button	30	zREC (B Deck) button and indicator	57	H(A Deck) button
4	REC button and indicator	31	H SPEED DUB button	58	MIX MIC jack
5	DAILY button and indicator	32	CD SYNC button	59	GUITAR jack
6	TUNING - button	33	.AMS >knob	60	MIC LEVEL knob
7	TUNING + button	34	HX(CD) button and indicator	61	GUITAR LEVEL knob
8	Display window	35	x(CD) button	62	SUPER WOOFER MODE button
9	ENTER/NEXT button and indicator	36	m(CD) button	63	SUPER WOOFER button and indicator
10	TUNER MEMORY button	37	M(CD) button	64	FILE MENU button
11	STEREO/MONO button	38	DISK SKIP button	65	GEQ CTRL button
12	TUNING MODE button	39	VIDEO2 INPUT jacks	66	ENTER button and indicator
13	GEQ control button	40	REPEAT button	67	GROOVE button and indicator
14	Remote sensor	41	PLAY MODE button	68	Equalizer indicators
15	SYNC EQ button	42	DISC 1 button	69	EFFECT button and indicator
16	SYNC BASS button	43	DISC 2 button	70	TUNER/BAND button
17	SURROUND button and indicator	44	DISC 3 button	71	SPECTRUM ANALYZER button
18	KARAOKE PON button	45	DISC 4 button	72	DISPLAY button
19	FUNCTION button	46	DISC 5 button	73	DEMO (STANDBY) button
20	VOLUME knob	47	EDIT button	74	KEY CONTROL # button
21	Z(A Deck) button	48	NON-STOP button and indicator	75	KEY CONTROL 2 button
22	Z(B Deck) button	49	FLASH button	76	RETURN button
23	PHONES jack	50	LOOP button	77	PREV button
24	h(B Deck) button and indicator	51	DIRECTION button	78	NEXT button
25	H(B Deck) button and indicator	52	DOLBY NR button	79	SELECT button
26	x(B Deck) button	53	x(A Deck) button	80	ACTIVE button
27	m(B Deck) button	54	m(A Deck) button

• AMS is the abbreviation for Automatic Music Sensor.

This section is extracted from instruction manual.

7

Tip

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. 4 Perform steps 2 through 5 in the previous explanation.

Note

The clock setting is canceled when you disconnect the power cord or if a power failure occurs.

Step 2: Setting the

time

You must set the time before using the timer

functions.

1 2,4 3,5

1 Press c/CLOCK SET.

The hour indication flashes.

2 Press TUNING +/ – to set the hour.

3 Press ENTER/NEXT.

The minute indication flashes.

4 Press TUNING +/ – to set the minute.

5 Press ENTER/NEXT.

The clock starts.

10

SECTION 3

DISASSEMBLY

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

3-1. FRONT PANEL AND VIDEO BOARD

	9Connector(CN452)
8Flat type wire(CN303)	0Connector(CN702)
7Flat type wire(CN304)
6Flat type wire	4Screw(BVTP3x8)
(CN431)
1Screw(BVTP3x8)	5Two earth wirs
2Earth wire	qf Screw (BVTP 3x8)

wa Bracket (VCD)

w; Connector (CN301)

qdFront panel

qj Video board

3Connector (CN802)

			qh Screw
	qaScrew(BVTP3x8)		(BVTP 3x8)
		qg Screw	qk Flat type wire
		(BVTP 3x8)
	qsFour screws(BVTP3x8)		(CN501)
			ql Flat type wire (CN503)

3-2. MAIN BOARD

4Screw(BVTP3x8)

1Two screws(BVTP3x8)

0Back panel

8Three screws(BVTP3x8)

qaTwo screws(BVTP3x8) qsFan motor

7Two screws(BVTP3x8)

6Two screws(BVTP3x8)

5Seven screws(BVTP3x8)

9Connector(CN903)

3Tuner

2Flat type wire(CN1)

qdTwo screws(BVTP3x8)

qfMain board

11

	3-3. SUB PANEL	3-4. CD LID ASSEMBLY
		5Five screws
	1Three screws	(BVTP2.6x8)
		2Spring(CD lid)
	(BVTP2.6x8)
	7Screw
	(BVTP2.6x8)
	2Ornamental
	plate

3Connector (CN812)

8Four screws (BVTP2.6x8)

Claw 4Connector (CN703)

9Front input board

0Sub panel block	6Screw	3 Sab panel assembly
	(BVTP2.6x8)	1CD lid assembly

3-5. TAPE MECHANISM DECK AND CASSETTE LID

qsHolder(deck B)

qfHolder(deck A)

4Mechanism deck

1Two screws(BVTP3x8)

2Screw(BVTP3x8)

qdSpring(deck A)

7Screw (BVTP3x8)

qaSpring(deck B)

9Spring(TClid)

5Two screws (BVTP3x8)

3Screw(BVTP3x8)

6Screw(BVTP3x8)

0Bracket

8Spring(TClid)

12

3-6. CD MECHANISM DECK

3-7. BASE UNIT

1Five screws (BVTP3x8)

2CD mechanism deck

3Base unit

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.

4Stop screw

A	2Screw (BVTP3X8

1Screw (BVTP3X8)

3Bracket (BU)

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

SL501 SL502 SL503

TEST MODE

IC505

	CT503
	VIDEO	IC507
	FREQUENCY

[VIDEO BOARD] (SIDE B)

	TEST	SL503	IC502
		SL502
	MODE
		SL501

14

SECTION 5

MECHANICAL 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	Torque meter	Meter reading
			3.04 – 6.96 N • m
	FWD	CQ-102C	(31 to 71 g • cm)
			(0.43 – 0.98 oz • inch)
	FWD		0.20 – 0.58 N • m
		CQ-102C	(2 to 6 g • cm)
	back tension
			(0.02 – 0.08 oz • inch)
			3.04 – 6.96 N • m
	REV	CQ-102RC	(31 to 71 g • cm)
			(0.43 – 0.98 oz • inch)
	REV		0.20 – 0.58 N • m
		CQ-102RC	(2 to 6 g • cm)
	back tension
			(0.02 – 0.08 oz • inch)
			6.97 – 14.02 N • m
	FF/REW	CQ-201B	(71 to 143 g • cm)
			(0.98 – 1.99 oz • inch)
			0.98 N • m or more
	FWD tension	CQ-403A	(100 g or more)
			(3.53 oz or more)
			0.98 N • m or more
	REV tension	CQ-403R	(100 g or more)
			(3.53 oz or more)

SECTION 6

ELECTRICAL ADJUSTMENTS

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.

Tape	Signal	Used for
P-4-A100	10 kHz, –10 dB	Azimuth Adjustment
WS-48B	3 kHz, 0 dB	Tape Speed Adjustment
P-4-L300	315 Hz, 0 dB	Level Adjustment

Record/Playback Head Azimuth Adjustment

(Deck A, Deck B)

Note: Perform this adjustments for both decks.

Procedure:

1. Mode : Playback

test tape
P-4-A100	main board
(10kHz, –10dB)	CN301		level meter
	Pin 1	(R-ch)
	Pin 3	(L-ch)
set			+
			–

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

L-CH	output
peak		within
	level
		1 dB		within 1dB
	R-CH
screw	peak
position				screw
		L-CH	R-CH
				position
		peak	peak

15

3. Mode: Playback

test tape P-4-A100 (10kHz, –10dB)

main board
CN301
Pin 3 (L-ch)	oscilloscope
Pin 2 (GND)
L
set
R
Pin 1 (R-ch)

Waveform of oscilloscope

in phase	45°	90°	135°	180°
	good			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

Tape Speed Adjustment (Deck A)

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 in the test mode.)

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

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)

level meter

set

main board

CN301

Pin 1 (R-ch)

Pin 3 (L-ch)

Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L-CH) and RV401 (R-CH)

so that adjustment within 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

16

Record Bias 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 } 50 mV (–23.8 dB)

2)10 kHz

AF OSC	blank tape
600 Ω	CS-123
attenuator
	set

4. Mode: Playback

recorded	level meter
position

set

main board

CN301

Pin 1 (R-ch)

Pin 3 (L-ch)

5.Confirm playback the signal recorded in step 2 become adjustment level as follows.

If these levels do not adjustment level, adjust the RV341 (L-CH) and RV441 (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

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 315Hz 50 mV (–23.8 dB)

AF OSC	blank tape
600 Ω	CS-123
attenuator
	set

4. Mode: Playback

recorded		level meter
position
	set
	main board
	CN301
	Pin 1	(R-ch)
	Pin 3	(L-ch)

5.Confirm playback the signal recorded in step 2 become adjustment level as follows.

If these levels do not adjustment level, adjust the RV301 (L-CH) and RV351 (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

Adjustment Location:			[MAIN BOARD] (Conductor Side)
[AUDIO BOARD] (Conductor Side)
RV341(Lch),RV441(Rch)	RV311(Lch),RV411(Rch)
Record Bias	Playback Level (Deck A)
RV301 RV401					Record Level (Lch)
			CN301		RV301
		RV411
RV441 RV341	RV311
			3
			1
				43	42
RV301(Lch),RV401(Rch)			IC301	56	29
				1	28
Playback Level (Deck B)				14 15
			RV351
			Record Level (Rch)

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.

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

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.

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

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	A (DC voltage)
	level : 1.3 ± 0.6 Vp-p

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.

Traverse waveform

	C (DC
0V	voltage)
Tracking servo	Tracking servo
Sled servo	Sled servo
OFF	ON

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

Adjustment Location: BD board

18

Adjustment Location :

[ BD BOARD ] — SIDE B —

TP (RF)

TP (VC)

	TP	TP
TP	(FE)	(TE)
(AGCCON)
TP
(IOP)

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

SL501 SL502 SL503

TEST MODE

IC505

(27MHz)

CT503

VIDEO IC507

FREQUENCY

(GND)

frequency counter

VIDEO board (27 MHz)

+

–

[ VIDEO BOARD ] – SIDE B –

(27MHz) IC506

(GND)

	TEST	SL503	IC502
		SL502
	MODE SL501

7-1. CIRCUIT BOARDS LOCATION

PANEL-FL board

MIC board

TC-A board

PANEL-VR board

TC-B board

LEAF SW board

AUDIO board

CD MOTOR board

HCD-LV80

SECTION 7

DIAGRAMS

TUNER UNIT

VIDEO board

TRANS board	MAIN board

HEADPHONE board

CD-L board

PA board

CD-R board

FRONT INPUT board

TABLE SENSOR board

BD board

LED board

19 19

HCD-LV80

7-2. BLOCK DIAGRAMS

– BD SECTION –

OPTICAL PICK-UP BLOCK

(KSS-213D/Q-NP)

DETECTOR

E

A

C

A C

D

B D

B

F

E

F

LD

LASER

DIODE

PD

LD

POWER

TRACKING

COIL

FOCUS

COIL

M102

SLED

MOTOR

M101

SPINDLE

MOTOR

										IC101
			IC103						DIGITAL SERVO
									DIGITAL SIGNAL PRCESSOR
VCC			RF AMP
VC		A
	5
	7	C	RF		RFD				RF AC
		D	SUMMING		RF EQ	16		50
	8				AMP
			AMP
	6	B			RFI	17
			FOCUS		FE	14	INTEG-	49	ASYI	ASYMMETRY
			ERROR
							RATOR			CORRECTION
			AMP
								48	ASYO
	11	E	TRACKING		TE	13
	10	F	ERROR
			AMP
LD	3	LD
DRIVE
Q101
					VC	12
					BUFFER
							VC
		PD	APC LD		LD ON		VC	38
	4					22
			AMP
									RFDC
								43
					REF				FE
								39
									TE	OP AMP	A/D
					21			41
									CE	ANALOG SW	CONVERTER
		IC102					VC	42
									SE
	FOCUS/TRACKING COIL DRIVE						INTEG-	40
	SPINDLE/SLED MOTOR DRIVE						RATOR
T+	12
T			5	TFDR						PWM
	11
			6	TRDR						GENERATOR
									TFDR
F+								31		TRACKING
	14								TRDR
								32		PWM
				FFDR						GENERATOR
F			2
	13			FRDR					FFDR
			3					33		FOCUS
SD+								34	FRDR	PWM
	17									GENERATOR
M			24	SFDR				29	SFDR	SLED
SD	18			SRDR					SRDR
			23					30		PWM
SP+										GENERATOR
	15
M			25					25	MDP
SP	16
			27		VC
			MUTE 20	XRST

EFM

DEMODULATOR

DIGITAL

PLL

DIGITAL

CLV

CONTROL SIGNAL

BLOCK

SERVO

BLOCK

SERVO DSP

TRACKING

SERVO

FOCUS

SERVO

SLED

SERVO

32K RAM

REGISTER

SUB CODE

PROCESSOR

DETECTOR

MIRR

DFCT

FOK

DATA BUS

09

					IC781
				CD DIGITAL
		MD2	63	D+5V	OUT
					OPTICAL
ERROR	DIGITAL	D OUT	64	1	DOUT
	OUT
CORRECTOR
		PCM-D			ADATA
			66
		BCLK	67		BCLK
D/A		LRCK
INTERFACE			65		LRCK
		C2PO
			14		C2PO
		MUTE
			3		MUTE

CLOCK	XTAI		IC104	(XTAL 33.8MHz)
		71
GENERATOR			4	MCK
				2
	XTSL	69		CTRL1
	SENS
		7		SENS
SERVO	DATA	4		DATA
	XLAT
AUTO		5		XLT
SEQUENCER	CLOK	6		CLK
CPU	SCOR
INTERFACE		15		SCOR
	SQSO
		76		SUBQ
	SQCK
		77		SQCK
	S STOP	26	A+5V
SERVO			S101
INTERFACE	SCLK		LIMIT SW
		8		SCLK
				LPH
	XRST 82			XRST
				LD ON

• SIGNAL PATH

: CD

: VIDEO

: Digital out

	DISC				TRAY SENS
	SENSOR
	IC202
S201					UP SW
		IC201
(UP SWITCH)
		MOTOR DRIVER
M201	3	OUT 2	IN 2	1	TBL-R
TABLE	M
MOTOR	7	OUT 1	IN 1	9	TBL-L
+5V		LED SW			LED
		Q201
	D201
	(DISC No.)

A

VIDEO

SECTION

(Page 24)

C

MAIN

SECTION (2/2)

(Page 23)

20 20

HCD-LV80

– DECK SECTION –

S1004

S1008

PB A/B

MS OUT

A CrO2

B CrO2

CN301

RV311

3

R CH

16

17

19

28

27

26

IC611

PLAYBACK

1

PB-A/B

A 120/70 B NORM/CROM/

LEVEL

MS

L

DECK A

70

METAL

A IN

PAS

48

PB OUT

HP101

40

TC PB L

46

B IN

120

PB HEAD

R CH

DOL

LM ON/ 25

LM ON/OFF

(DECK A)

R

DOLBY NR

OFF

DOLBY NR

NORM/

RV301

IC301

NORM/HIGH

HIGH

18

IC601

PLAYBACK

NR ON/

23

NR ON/OFF

LEVEL

OFF

L

DECK B

RV301

24

REC/PB/PASS

PB

REC/PB HEAD

REC LEVEL

RECOUT

DOLBY

(DECK B)

39

LIN

R

R CH

TYPE B

43

TC REC L

36

EQOUT

EQIN

38

BIAS SW

BIAS ON/OFF

20

BIAS ON/OFF

RM ON/OFF

22

RM ON/OFF

3

1

D

M

ALC ON/OFF

15

ALC ON/OFF

IC602

32

31, 33

P

R

RELAY

HRPE101

4

REC/PB

CAP MOTOR

CAPM CNT1

RV341

CAPM CNT2

CONTROL

REC

+7.5V

Q336-343

BIAS

Q623

M1

SPEED

SWITCH

CAPSTAN

M

CONTROL

CAP M H / L

Q335

MOTOR

Q1001

B

REC BIAS

ERASE BIAS

BIAS OSC

T621, Q621, 622

ERASE HEAD X				MAIN (1/2), (2/2)
RV1002	RV1001			SECTION
			REEL	(Page 22, 23)
NORMAL	HIGH
SPEED	SPEED		DETECT	A SHUT
			IC1001
			REEL
			DETECT	B SHUT
			IC1002
• R CH : Same as L ch			S1001 (A PLAY)
		+5V		A PLAY
• SIGNAL PATH			S1002 (B PLAY)	B PLAY
: PB (DECK A)
: PB (DECK B)		S1003		A HALF
: REC (DECK B)		(A HALF)	+5V
			+5V
		S1005
		(REC A)
09		S1006		B HALF/REC A/REC B
		(B HALF)

S1009 (REC B)

•PLUNGER SOLENOID is supplied as the MECHANICAL BLOCK ASSY.

A DECK/		TRIGGER			B TRIG
		MOTOR
B DECK
		CONTROL
PLUNGER					A TRIG
		Q331-334

21 21

HCD-LV80

– MAIN (1/2) SECTION –

				J804
		VIDEO 2
		IN
	VIDEO	O
	SECTION		VCD VIDEO
	(Page 24)
				J702
		VIDEO
		IN
				J701
		PHONO
		(L IN)
		FM/AM TUNER
		TUNER UNIT IS		ST-L
		SUPPLED AS THE
		ASSEMBLED
		BLOCK
	DECK	B
	SECTION			TC PB L
	(Page 21)
	VIDEO	M
	SECTION			CD-L
	(Page 24)
				J701
		MD (L IN)
	POWER	Q		MIC-SIG
	SECTION
	(Page 25)	V1, AU		J701
		(L IN)
				J804
		V2, AU,
		L-CH IN

•R CH: Same as L ch

•SIGNAL PATH

:FM

	: CD
	: PB
	: REC
	: VIDEO/MD
09	: VIDEO

IC191

AV SWITCH

6	IN3
8	IN4	VD OUT 10
1	IN1	IC101

	A	B	C			SOUND PROCESSOR 1
	2	3	5	IC601				L+R	30
	46	45	28
				PHONO AMP
				3	1	IN A2		REC B2	57
					69
					68	IN B2		BUS OUT2	36
								REC A2	58
					67	IN C2		BBA2	39
					66	IN D2
								BBB2	38
					65	IN E2
IC181 SELECTOR					2	MIC IN
12	X0
								BUF IN2	37
14	X1	X 13			64	IN F2
						LATCH	DATA	CLOCK
	A	B				34	33	32
	10	9
	46	45				38	47	48

J702

VIDEO

OUT

	SPEANA	D
	J701
		MD OUT
	L-CH SIG	E
TC REC L	MUTE
	SWITCH
	Q113
	TC REC L	B

SWITCH

Q112

SWITCH

Q111

7

SWITCH

Q115

34

MAIN CONTROL

IC501 (1/2)

					DBFB-H/L	7	7
							28
					V-MUTE	28
							34
					SW-MODE	34
							38
					493-LAT	38
							45
					FUNC-SEL1	45
							46
					FUNC-SEL0	46
							47
MUTE					493-DATA	47
							48
SWITCH		6	LINE-MUTE		493-MUTE	48
Q803
	MUTE	3	F-RELAY		AC-CUT	22	RESET	F
	SWITCH			RESET
D807	Q804
				12
				RESET			DBFB	G
				SWITCH
							F-RELAY
RESET				Q801
SWITCH
Q802					D805
				RESET
						+5v
				IC801

DISPLAY

SECTION

(Page 26)

POWER

SECTION

(Page 25)

DECK

SECTION

(Page 21)

DISPLAY

SECTION

(Page 26)

POWER

SECTION

(Page 25)

22 22

HCD-LV80

– MAIN (2/2) SECTION –

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

09

IC931

Q931

I2C CLK

29

+10V

SWITCH

I2C DATA

30

+UNREG, 17V

1

3

REG

MAIN CONTROL

IC501 (2/2)

2

Q932

LX7

1

43

SWITCH

STK-POWER

1

POWER

42

ECO

93

I

FAN SWITCH

FAN DET

HP MUTE

IC932

Q961, 963

HP.SW

36

H/P IN

1

STK POWER

27

27

PROTECT

27

PROTECT

POWER

+12V

1

3

42

SECTION

REG

IC933

FL OFF

42

(Page 25)

43

STBY RELAY

43

93

+7V

HP MUTE

93

1

3

REG

WAKE UP

18

18

30

DATA

J

IC951

Q903

29

29

SWITCH

IIC-CLK

29

CLOCK

UN–12V

–7V

30

18

2

3

IIC-DATA

30

WAKE UP

REG

X-RST

59

XRST

DISPLAY

SECTION

Q904

(Page 26)

SWITCH

TRAY.SENS

61

DISC-SENS

TBL.L

63

TBL-L

DETECTOR

TBL.R

65

TBL-R

Q905

UP SW

68

ENC 3/UP-SW

LED

69

ENC 2/DISC-LED

IC901

Q911

B TRG

72

B-TRG

+7V

SWITCH

A TRG

73

A-TRG

UN+12V

1

3

CAPM-CNT 2

74

CAPM-CNT 2

REG

(LED+7V)

CAPM-CNT 1

75

CAPM-CNT 1

2

CAP-M-H/L

76

CAP-M-H/L

Q912

MS OUT

77

AMS IN

SWITCH

LM ON/OFF

78

TC-MUTE

Q902

REC/PB/PASS

79

R/PB/PAS

SWITCH

NR ON/OFF

80

NR-ON/OFF

X501

RM ON/OFF

81

REC-MUTE

32.768kHz

BIAS ON/OFF

82

BIAS

XC-IN

10

IC911

NORM/HIGH

83

EQ-H/N

PB A/B

84

PB-A/B

XC-OUT

11

1

+5V

3

ALC ON/OFF

85

ALC

X502

REG

B PLAY

86

B-PLAY-SW

16MHz

A PLAY

87

A-PLAY-SW

X-OUT

13

A-HALF

88

A-HALF

B-HALF/REC A/REC B

89

B-HALF

X-IN

15

B SHUT

90

B-SHUT

A SHUT

91

A-SHUT

Q911

RELAY

100

TC-RELAY

SWITCH

(D+5V SW)

ST-MUTE

49

ST-MUTE

2

Q912

STEREO

50

STEREO

SWITCH

TUNED

51

TUNED

POWER

2

Q914

ST-CE

52

ST-CE

ST-DOUT

53

ST-DOUT

SWITCH

Q913

5

ST-DIN

54

ST-DIN

CD-POWER

5

ST-CLK

55

ST-CLK

SWITCH

(CD D+5V SW)

IC921

(CD A+5V SW)

1

+5V

3

REG

• R CH : Same as L ch

23

23

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)

HCD-LV80

– VIDEO SECTION –

		D-RAM
		IC507
WE RAS UCAS LCAS	A0	A8
13 14 28 29	16 - 19	22 - 26

DQ1 2

DQ16 - 10 31 - 39

ROM

IC506

O0			O7	A11		A17	A0		A10		CE
13 - 15		17 - 21		25 4 28 29 3 2 14 10			12 - 5 27 26 23			22

38 42	40	10 - 29	58 - 44	37
MWE RASO	CAS	MD0 I MD15	MA0 I MA10	MCE

LEVEL SHIFT

OUTPUT AMP

IC501

IC401

ADATA

1

4

4

CD-DATA

Y-OUT

69

BUFFER

TRAP

MIX AMP

MUTE

O

MAIN (1/2)

7

SECTION

Q301

Q302,306,307

5

VCD VIDEO

BCLK

13

10

3

CD-BCK

Q308,310

Q454

(Page 22)

LRCK

5

8

5

CD-LRCK

3

1

MUTE

J301

4

S VIDEO

Q453

3

C2P0

6

CD-C2P0

OUT

VIDEO/CD DECODER

2

1

IC505

DATAI

112

HD-OUT

DATAO

119

HD-IN

CLK1

BUFFER

117

HCK

C-OUT

75

HRDY

Q303,304

113

HRDY

INT

114

HINT

HSEL

DA-DATA

110

121

HSEL

RST

60

RESET

DA-LRCK

108

INVERTER

93

PGIO2/VSYNC/CSYNC

DA-BCK

111

27MHz

VCK-IN

106

Q502

DA-XCLK

86

DIGITAL FILTER & D/A CONVERTER

IC509

AMP

IC101

18

D/A

14

3

1

CD-L

M

19

PLM

(L - CH)

17

CONV

11

R-CH

MAIN (1/2)

CLK1, DATA0

DATA0

9

SECTION

A

CLK1

MODE

CLOCK

1

X503

(Page 22)

8

VIDEO CD CONTROL

7

DIVIDER

24

27MHz

IC502

CT503

CD

10

21 20

4

VIDEO

SECTION

RSTB

FREQUENCY

(Page 20)

DATA0

31

DATA1O

DATAI

SHARPNESS

34

32

DATA1I

CLK1

33

CLK1

DF LATCH

22

INT

LEVEL SHIFT

20

CL680 INT

A7

65

HSEL

21

CL680 HSEL

IC504

HRDY

XIN

15

23

CL680 HRDY

X501

RESET

27MHz

24

680 RESET

3

6

10MHz

13

NTSC

XOUT

S501

11

8

384FS

45

BUS

NT/PAL

93

SYSTEM

AUTO

1

12 768FS

+5V

SELECT

DATA

3

DSP DATA

PAL

XLT

4

DSP LATCH

TEST LED

73

D502

CLK

5

DSP CLK

MAIN (2/2)

N

SENS

1

SENSE

I2C.DATA

SECTION

SCLK

2

SENSE CLK

I2C.CLK

(Page 23)

XRESET

12

MUTE

10

DSP MUTE

CTRL1

11

CTRL1(L:DOUBLE)

LPH

27

CTRL2

P

MAIN (2/2)

LDON

28

LDON

X-RST

SECTION

18

SCOR

SCOR

D5V

3.3V REG

+3.3V

(Page 23)

SUBQ

36

SUBQ DATA

SQCK

37

SUBQ CLK

Q531

• R CH: Same as L ch

77

DEVICE RESET

• SIGNAL PATH

I2C.DATA

30

I2C.CLK

29

: CD

: CHROMA

XRST

(XTAL 33.8MHz)

:Y

: VIDEO

09

MCK

24

24

– POWER SECTION –

					MIC-SIG
MIC AMP	MIC LEVEL	ECHO CONTROL		ECHO LEVEL	MIC AMP
IC850 (1/2)	RV750		IC851	RV751	IC850 (2/2)
J801
MIC 1	1	LPF 1 IN	LPF 1 OUT	2	MIC-SIG
J802	9	LPF 2 IN	LPF 2 OUT	8
MIC 2
	11	OP 2 IN	OP 2 OUT	10

HCD-LV80

K	DISPLAY
	SECTION
	(Page 26)
Q	MAIN (1/2)
	SECTION
	(Page 22)

									J803
MAIN (1/2)	G	DBFB								PHONES
SECTION
(Page 22)		F-RELAY					R-ch				MAIN (2/2)
			POWER AMP & VOLUME CONTROL						HP.SW	H
											SECTION
			IC801					FAN DETECTOR	FAN DET		(Page 23)
								D405	TM401
MAIN (1/2)	E							RY401
SECTION		L-CH IN	18		11					L
(Page 22)										FRONT
			VOLUME				RELAY	R-CH		R
							DRIVER
			CONTROL
							Q401-402
			6	3	4	PROTECT	LATCH
					VOLUME
					CONTROL	DC AMP	DRIVER
					D802, 852	Q433-434	Q432

THERMAL

L-CH THERMAL

LATCH

PROTECT

MAIN (2/2)

L

D804

SENSOR

PROTECT SWITCH

DRIVER

SWITCH

Q831-832

Q801

Q437

Q431

SECTION

EVER +5V

MUTE

TH831

(Page 23)

MUTE

CONTROL

PROTECT

Q834

SW

SWITCH

Q805

HEAD PHONE

Q439

HP-MUTE

MUTE

Q833

MAIN (2/2)

I

POWER

MUTE

MUTE

TRANSFORMER

SECTION

STK-POWER

DRIVE

SWITCH

T951

(Page 23)

Q804

Q803

VF

VF

PROTECT

+UNREG. 12V

RECT

D833-836

240V

UN +10V

RECT

VOLTAGE

SELECTOR

UN –10V

D841-844

VS901

230V

JW971

• R CH : Same as L ch

120V

+VH

RECT

AC-L

RECT

F951

SWITCH

–35V REG

• SIGNAL PATH

VF (–35V)

D831

AC-L

D832

Q908

Q903

AC

09

: FM

IN

25 25

HCD-LV80

– DISPLAY SECTION –

(Page22)	F
MAIN (1/2) SECTION
					RESET
MAIN (2/2) SECTION					DATA
				CLOCK
(Page	J
				WAKE UP
23)
(Page 25)
	K
POWER SECTION				MIC–SIG
MAIN (1/2) SECTION				SPEANA

D

(Page 22)

09

DISPLAY CONTROL

IC601

								REMOTE
						SIRCS	1	CONTROL
								RECIEVE
								IC702
								S701
								JOG	SERIAL
						JOG A	2	.AMS >	PARALLEL
						JOG B	8		CONVERTER
									IC701
						LED SCK	3		14 CLK	P3	1
						LED LATCH	4		15 STB		•
										P5	3
						LED DAT	5		13 DATA	•	5
										P7	•
										•
			70 X IN								7
										P9	11
		X601								P16
											•
		12.5MHz									20
								S691			22
			72 X OUT
						D-SW	80	Z
										P1	17
								OPEN
										•	•
										P2	19
								Q601 – Q603	+5VH
			73 RESET			LED SEL	7	LED POWER
			78 I2C DATA					SWITCH	+5VL
			79 I2C CLK
			22 WAKE UP					S701
						VOLUME A	9	VOLUME
						VOLUME B 10
	REC LEVEL
	OUTPUT
DISPLAY CONTROL (FOR MIC)						KEY 0	11
	IC603							KEY MATRIX
						KEY 4	15
	REC LEVEL 11		21 ALL BAND					Q605 – Q607
3	LINE NF	F06 12	20 BPF 4
						DAILY LED	74	LED DRIVER	D601 – D603
4	LINE IN	F05 13	19 BPF 3
						REC LED	75
6	REC IN	F04 14	18 BPF 2
						LED-EC0	77
5	REC NF	F02 16	17 BPF 1
		F01 17	16 BPF 0					Q608 – Q610
						GR-1	43	DRIVER
						GR-15	28
						GR-16	27
			SEG-1	23	GR-3	14, 2
			45	67	29	40, 42

D604 – D607, D611, D612, D615 – D621,

D623 – D627, D635 – D638

D700

D631, D632, D641

FLUORESCENT INDICATOR TUBE

FL601

VF

26 26

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 1/4 W or less unless otherwise specified.

•f : internal component.

•2: nonflammable resistor.

•1: fusible resistor.

•C: panel designation.

Note: The components identified by mark 0or dotted line with mark 0are 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.

For printed wiring boards.

Note:

•X: parts extracted from the component side.

•Y: parts extracted from the conductor side.

•a : Through hole.

•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.

• Indication of transistor

B	C	E
		These are omitted.
B	C	E
		These are omitted.
C
Q		These are omitted
B E

WAVEFORMS

– CD SECTION –

1

1.3Vp-p

IC101 t; RFAC

2

2.5V

APPROX 500mVp-p

IC101 ra TE

3

2.5V

APPROX 200mVp-p

IC101 el FE

4

2.6Vp-p

7.5 sec

IC101 wg MDP

HCD-LV80

– VIDEO SECTION –

	1	7
		4Vp-p
		4.6Vp-p
	10MHz	44.1kHz
	IC502 qd XOUT
		IC509 ql LRCK
	2	8

4.8Vp-p

1Vp-p

2.11MHz

H

IC505 ug COUT	IC509 qj BCLK
3	9
2Vp-p	4.8Vp-p
H	33.8MHz
IC505 yl YOUT	IC504 8 384FS

4	0
1Vp-p	3.8Vp-p

H	27MHz
Q303 E COUT	IC504 6 27M
5	qa
2Vp-p	2.8Vp-p
H	33.8MHz
IC401 4 YOUT	IC504 qs

6

5.8Vp-p

27MHz

IC509 1 XT1

– MAIN (2/3) SECTION –

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 27

HCD-LV80

7-3. PRINTED WIRING BOARD – BD SECTION –

• See page 19 for Circuit Boards Location.

(Page 32)

28 28