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.