Sony HCD-LV80 User manual

1
HCD-LV80
E Model
SPECIFICATIONS
COMPACT Hi-Fi STEREO SYSTEM
— Continued on next page —
Model Name Using Similar Mechanism HCD-VR50/VR70
CD Mechanism Type CDM37L-5BD34L
Base Unit Type BU-5BD34L
Optical Pick-up Type KSS-213D/Q-NP
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type TCM-230PWR12
CD
SECTION
TAPE DECK
SECTION
SERVICE MANUAL
HCD-LV80 is the tuner, deck, CD and
amplifier section in LBT-LV80.
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)
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,
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
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
Fre
q
uenc
y
Res
p
onse 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

2
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation 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.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTSIDENTIFIEDBYMARK 0OR DOTTEDLINE
WITH MARK 0ON 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.
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 PROD-
UCT MARKING is located on
the rear exterior.
This caution
label is located
inside the unit.
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.

3
MODEL PARTS No.
MY, SP model 4-227-751-2 s
EA model 4-227-751-3 s
NOTES ON HANDLINGTHE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carryout the “Scurve check”in“CD section adjustment”and check
that the S curve waveform is output four times.
MODEL IDENTIFICATION
—BACK PANEL —
•Abbreviation
SP : Singapore model
EA : SaudiArabia model
MY : Malaysia model
Parts No.

4
8. EXPLODEDVIEWS
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
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
TABLE OF CONTENTS

5
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 "/1button to turn the set ON.
2. Press LOOP button and "/1button 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 "/1button 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 Mbutton is pressed, the optical pick-up moves outside. When mbutton 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 "/1button 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 AMTuner Step between 9kHz and 10kHz
• A step of AM channels can be changed over between 9kHz and 10kHz.
Procedure:
1. Press "/1button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM”.
3. Press "/1button to turn the set OFF.
4. Press ENTER and "/1buttons 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 IndicatorTube 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.

6
AMSTest 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 "/1button 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 "/1button 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 "/1button 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 AAG-1”is displayed.
2. The FWD side of deck A is played for two minutes.
“TAPE AAG-2”is displayed.
3. The tape in deck A is fast forwarded. “TAPE AAG-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 AAG-4”is displayed.
5. The tape in deck A is rewound. “TAPE AAG-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 AAG-5”is displayed.
10. Repeated from step 2.

7
•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 "/1button 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 "/1button 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.)

8
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 andAUDIO 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
MPEG decoder (IC505)
error
MPEG decoder (IC505)
or
DRAM (IC507) error
[VIDEO BOARD] (SIDE A)
D502
IC505
100 91
33 64
90
65
1
32
H
L
Li
g
ht
2 time blinkin
g
H
L
H
L
3 time blinkin
g

9
SECTION 2
GENERAL
Front Panel
1234567 8 91011121314
15
16
17
18
74
75
19
20
23
24 25
29 30
31 32
26 27 28
35 36 37
33
34
38
39
40 76
77
78
4179804243444546
47
48
49
51 52
56 57
58 59
60 61
64 65 66
53 54 55
50
62
63
67
68
69
70
71
72
73
21 22

10
This section is extracted from
instruction manual.
LOCATION OF PARTS AND CONTROLS
1"/1 (Power) button and indicator
2c/CLOCK SET button
3SLEEP button
4REC button and indicator
5DAILY button and indicator
6TUNING - button
7TUNING + button
8Display window
9ENTER/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 zREC (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 2button
76 RETURN button
77 PREV button
78 NEXT button
79 SELECT button
80 ACTIVE button
• AMS is the abbreviation for Automatic
Music Sensor.
7
Step 2: Setting the time You must set the time before using the timer functions. 1Press c/CLOCK SET.
The hour indication flashes.
2Press TUNING +/ –to set the hour. 3Press ENTER/NEXT.
The minute indication flashes.
4Press TUNING +/ –to set the
minute.
5Press ENTER/NEXT.
The clock starts.
3,51 2,4
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: 1Press c/CLOCK SET.
2 Press TUNING +/ –to select SET CLOCK. 3Press ENTER/NEXT. 4Perform 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.

11
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
1Two screws(BVTP3x8)
6Two screws(BVTP3x8)
qdTwo screws(BVTP3x8)
qfMain board
qsFan motor
0Back panel
7Two screws(BVTP3x8)
8Three screws(BVTP3x8)
qaTwo screws(BVTP3x8)
5Seven screws(BVTP3x8)
3Tuner
2Flat type wire(CN1)
9Connector(CN903)
4Screw(BVTP3x8)

12
3-3. SUB PANEL 3-4. CD LID ASSEMBLY
1CD lid assembl
y
3Sab panel assembly
2Spring(CD lid)
3-5.TAPE MECHANISM DECK AND CASSETTE LID
1Two screws(BVTP3x8)
4Mechanism deck
5Two screws
(BVTP3x8)
2Screw(BVTP3x8)
7Screw
(BVTP3x8)
qaSpring(deck B)
9Spring(TC- lid)
8Spring(TC- lid)
0Bracket
qdSpring(deck A)
qfHolder(deck A) qsHolder(deck B)
3Screw(BVTP3x8
)
6Screw(BVTP3x8)
5Five screws
(BVTP2.6x8)
1Three screws
(BVTP2.6x8)
6Screw
(BVTP2.6x8)
7Screw
(BVTP2.6x8)
2Ornamental
plate
8Four screws
(BVTP2.6x8)
9Front input boar
d
0Sub panel block
4Connector
(CN703)
3Connector
(CN812)
Claw

13
3-6. CD MECHANISM DECK 3-7. BASE UNIT
3-8. DISCTABLE
Note:
When the disc table is installed, adjust the positions of
roller cam and mark Bas shown in the figure, then set to
the groove of disc table.
1Five screws (BVTP3x8)
2CD mechanism
deck
3Base uni
t
1Yoke fitting
2Boss
A
A
2Screw (BVTP3X8
1Screw (BVTP3X8)
4Stop screw
5Disc table
3Bracket (BU)

14
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)
[VIDEO BOARD] (SIDE B)
SL501
D502
SL502
IC507
IC505
CT503
SL503
TEST MODE
VIDEO
FREQUENCY
SL501
IC502
SL502
SL503
TEST
MODE

15
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)
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
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 demagne-
tizer.
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 sup-
ply voltage unless otherwise noted.
Torque Measurement
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1. Mode : Playback
Signal Used forTape
SECTION 5
MECHANICAL ADJUSTMENTS
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter Meter reading
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 sup-
ply 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 adjust-
ment.)
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.
P-4-A100
WS-48B
P-4-L300
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
Azimuth Adjustment
Tape Speed Adjustment
LevelAdjustment
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.
test tape
P-4-A100
(10kHz, –10dB) main board
CN301
Pin 1(R-ch)
Pin 3(L-ch)
level meter
set +
–
L-CH
peak
R-CH
peak
screw
position
output
level within
1 dB
L-CH
peak R-CH peak
screw
position
within 1dB

16
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Playback Head (Deck A)
Record/Playback/Erase Head (Deck B)
3. Mode: Playback 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 Hbutton 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
SampleValue 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
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]
test tape
P-4-A100
(10kHz, –10dB) oscilloscope
set
Waveform of oscilloscope
in phase 45°90°135°180°
good wrong
Pin 2(GND)
main board
CN301
Pin 3(L-ch)
Pin 1(R-ch)
L
R
Reverse Foward
Remove the cassette lid.
test tape
P-4-L300
(315Hz, 0dB) level meter
set
main board
CN301
Pin 1(R-ch)
Pin 3(L-ch)
RV1002 RV1001
RV1002(Normal Speed
)
RV1001(High Speed)

17
Record Bias Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjust-
ment,when the tape is rewound after recording, the “REC memory
mode”which rewinds only the recorded portion and playback is
set.
This “REC memory mode”is convenient for performing this ad-
justment. During recording, the input signal FUNCTION will auto-
matically switch to VIDEO 1.
(After recording, press the mbutton without stopping will re-
turn 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 zREC button, and then
press the Hbutton to start recording.
3. Mode: Record
5. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
If these levels do not adjustment level, adjust the RV341 (L-CH)
and RV441 (R-CH) on theAUDIO 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 Adjust-
ment, when the tape is rewound after recording, the “REC memory
mode”which rewinds only the recorded portion and playback is
set.
This “REC memory mode”is convenient for performing this
adjustment. During recording, the input signal FUNCTION will au-
tomatically switch to VIDEO 1.
(After recording, press the mbutton without stopping will re-
turn 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 zREC button, and then
press the Hbutton to start recording.
3. Mode: Record
4. Mode: Playback
5. Confirm playback the signal recorded in step 2 become adjust-
ment 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:
[AUDIO BOARD] (Conductor Side)
4. Mode: Playback
[MAIN BOARD] (Conductor Side)
recorded
position level meter
set
main board
CN301
Pin 1(R-ch)
Pin 3(L-ch)
AF OSC
VIDEO 1 (AUDIO) IN
1) 315 Hz
2) 10 kHz
blank tape
CS-123
set
attenuator 600 Ω
} 50 mV (–23.8 dB)
AF OSC
VIDEO 1 (AUDIO) IN
315Hz 50 mV (–23.8 dB)
blank tape
CS-123
set
attenuator 600 Ω
recorded
position level meter
set
main board
CN301
Pin 1(R-ch)
Pin 3(L-ch)
Record Level (Lch)
RV301
RV351
Record Level (Rch)
IC301 1
14 1528
29
42
43
56
3
1
CN301
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
RV301 RV401
RV341(Lch),RV441(Rch)
Record Bias RV311(Lch),RV411(Rch)
Playback Level (Deck A)
RV311 RV411

18
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 10MΩimpedance.
4. Clean theobject lensby anapplicator with neutral detergentwhen
the signal level is low than specified value with the following
checks.
S Curve Check
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 7button 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
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 bright-
ness to obtain best waveform.
Adjustment Location: BD board
RF Level Check
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 sig-
nal level is correct or not.
6. After check, remove the lead wire connected in step 2.
oscilloscope
BD board
TP (FE)
TP (VC) +
–
oscilloscope
BD board
TP (RF)
TP (VC) +
–
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 theA (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
Traverse waveform
0V
level : 1.3 ±0.6 Vp-p
A (DC voltage)
Center of the waveform
B
7. Press the PLAY MODE button. (The tracking servo and sled-
ding servo are turned ON.) Confirm the C (DC voltage) is al-
most equal to the A (DC voltage) is step 7.
Traverse waveform
0V C (DC
voltage)
Tracking servo
Sled servo
OFF
Tracking servo
Sled servo
ON
symmetry
A
B
Within 4.0 ±1.0 Vp-p
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
8. Desolder the short-land (SL502) short-circuited at step 2.
Adjustment Location: BD board

HCD-LV80
19
19
SECTION 7
DIAGRAMS
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.
[ VIDEO BOARD ] – SIDE B –
Adjustment Location :
[ VIDEO BOARD ] – SIDE A –
frequency counte
r
VIDEO board
(27 MHz) +
–
SL501 IC502
IC506
(27MHz)
(GND)
SL502
SL503
TEST
MODE
SL501
D502 SL502
CT503
SL503
TEST MODE
VIDEO
FREQUENCY
(27MHz)
(GND)
IC507
IC505
Adjustment Location :
[ BD BOARD ] — SIDE B —
TP
(VC)
TP
(RF)
TP
(TE)
TP
(IOP)
TP
(FE)
TP
(AGCCON)
7-1. CIRCUIT BOARDS LOCATION
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

HCD-LV80
20
20
E
F
A
B
C
D
DRIVE
Q101
LD
RF EQ
AMP
SUMMING
AMP
RF
ERROR
AMP
FOCUS
ERROR
AMP
TRACKING
APC LD
AMP
VC
BUFFER
VC
REF
RF AMP
IC103
DIGITAL SERVO
DIGITAL SIGNAL PRCESSOR
IC101
IC781
LASER
DIODE
DETECTOR
OPTICAL PICK-UP BLOCK
(KSS-213D/Q-NP)
A
C
D
B
E
F
LD
POWER
PD
LD
PD
LD
A
C
D
B
E
F
TE
FE
RFD
RFI
ASYMMETRY
CORRECTION
AUTO
SEQUENCER
SERVO
INTEG-
RATOR
DIGITAL
PLL
EFM
DEMODULATOR
REGISTER
SUB CODE
PROCESSOR
ERROR
CORRECTOR
DATA BUS
32K
RAM
D/A
INTERFACE
DIGITAL
CD DIGITAL
OUT
OPTICAL
OUT DOUT
SERVO
INTERFACE
DIGITAL
CLV
LD ON
OP AMP
ANALOG SW
A/D
CONVERTER
PWM
GENERATOR
TRACKING
PWM
GENERATOR
FOCUS
PWM
GENERATOR
SLED
PWM
GENERATOR
VC
TRACKING
SERVO
FOCUS
SERVO
SLED
SERVO
SERVO DSP
TFDR
TRDR
FFDR
FRDR
SFDR
SRDR
MDP
DETECTOR
MIRR
DFCT
FOK
D OUT
PCM-D
S STOP
RFDC
FE
TE
CE
VC
SE
CPU
INTERFACE
SENS
DATA
XLAT
CLOK
CLOCK
GENERATOR
XTAI
XTSL
M
M
TRACKING
COIL
FOCUS
COIL
SLED
MOTOR
M102
SPINDLE
MOTOR
M101
T+
T
F+
F
SD+
SD
SP+
SP
FOCUS/TRACKING COIL DRIVE
SPINDLE/SLED MOTOR DRIVE
IC102
VC
TFDR
TRDR
FFDR
FRDR
SFDR
SRDR
XRST
MUTE
09
S101
LIMIT SW
SQCK
A+5V
IC104
XRST
ADATA
BCLK
LRCK
MCK
SENS
CTRL1
DATA
SCLK SCLK
XLT
CLK
SCOR
SQSO
SCOR
SUBQ
SQCK
LPH
XRST
LD ON
LRCK
BCLK
C2PO
MUTE
MUTE
C2PO
D+5V
MD2
RF AC
ASYI
ASYO
CONTROL SIGNAL
BLOCK
SERVO
BLOCK
VCC
VC
VIDEO
SECTION
• SIGNAL PATH
: CD
: VIDEO
: Digital out
(Page 24)
MAIN
SECTION (2/2)
(Page 23)
A
C
(XTAL 33.8MHz)
42
5
7
8
6
11
10
3
4
23
24
27
25
20
22
21
12
13
17
14
16 50
48
49
43
38
41
39
40
42
32
31
34
33
30
29
25
64
63
67
66
14
65
71
3
7
69
15
6
5
4
77
76
8
26
82
1
12
11
14
13
17
18
15
16
3
2
6
5
INTEG-
RATOR
TBL-R
UP SW
TRAY SENS
TBL-L
DISC
SENSOR
IC202
IC201
MOTOR DRIVER
3
7
OUT 2
OUT 1
1
IN 2
9
IN 1
M
+5V
M201
TABLE
MOTOR
LED
D201
(DISC No.)
LED SW
Q201
S201
(UP SWITCH)
7-2. BLOCK DIAGRAMS
– BD SECTION –