background image
HCD-DR8AV/W900AV
US Model
Canadian Model
HCD-W900AV
E Model
Australian Model
HCD-DR8AV
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
MICROFILM
Model Name Using Similar Mechanism
HCD-DR4/DR5/DR6/DR440/
W300/W5000/XB500
CD Mechanism Type
CDM37M-5BD32L
Base Unit Name
BU-5BD32L
Optical Pick-up Name
KSS-213D/Q-N
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
TCM-230AWR2/230PWR2
HCD-DR8AV/W900AV is the tuner, deck, CD and
amplifier section in LBT-DR8AV/W900AV.
-- Continued on next page --
SPECIFICATIONS
CD
Section
Tape deck
Section
Amplifier section
LBT-W900AV
Front Speaker:
Continuous RMS power output (Reference)
100 + 100W
(8
at 1 kHz, 10% THD)
Total harmonics distortion
Less than 0.07%
(8
at 1 kHz, 50W)
Center Speaker:
Continuous RMS power output (Reference)
45W
(8
at 1 kHz, 10% THD)
Rear Speaker:
Continuous RMS power output (Reference)
40 + 40W
(8
at 1 kHz, 10% THD)
LBT-DR8AV
Front Speaker:
The following measured at AC 120/220/240V, 50Hz
DIN power output (Rated)
130 + 130W
(6
at 1 kHz, DIN)
Continuous RMS power output (Reference)
160 +160W
(6
at 1 kHz, 10% THD)
Center Speaker:
DIN power output (Rated)
30W
(8
at 1 kHz, DIN)
Continuous RMS power output (Reference)
40W
(8
at 1 kHz, 10% THD)
Rear Speaker:
DIN power output (Rated)
30 + 30W
(8
at 1 kHz, DIN)
Continuous RMS power output (Reference)
40 + 40W
(8
at 1 kHz, 10%
THD)
Inputs
PHONO IN (phono jacks):
sensitivity 3mV,
impedance 47k
MIX MIC (phone jack):
sensitivity 1mV,
impedance 10k
VIDEO1 IN (phono jacks):
sensitivity 250mV,
impedance 47k
VIDEO2 IN (phono jacks):
sensitivity 250mV,
impedance 47k
MD IN (phono jacks):
sensitivity 450mV,
impedance 47k
(LBT-DR8AV/W900AV)
DVD IN (phono jacks):
sensitivity 450mV,
impedance 47k
Outputs
PHONES (stereo phone jack):
accepts headphones of 8
or more
VIDEO OUT (phono jack):
voltage 250mV,
impedance 1k
MD OUT (phono jacks):
voltage 250mV, impedance
1k
WOOFER OUT (phono jack):
voltage 1V, impedance
1k
FRONT SPEAKER:
(LBT-W900AV)
accepts impedance of 8 to
16
(LBT-DR8AV)
accepts impedance of 6 to
16
CENTER SPEAKER:
accepts impedance of 8 to
16
REAR SPEAKER:
accepts impedance of 8 to
16
Video section
Inputs
VIDEO1 IN (phono jacks):
1Vp-p, 75
VIDEO2 IN (phono jacks):
1Vp-p, 75
Output
VIDEO OUT (phono jack):
1Vp-p, 75
Photo: HCD-DR8AV


background image
-- 2 --
CD player section
System
Compact disc and digital audio system
Laser
Semiconductor laser
(
=780nm) Emission
duration: continuous
Laser output
Max. 44.6µW*
* 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
2Hz ­ 20kHz (±0.5dB)
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 90 dB
CD DIGITAL OUT
(square optical connector jack, rear panel)
Wave length:
660 nm
Output level:
­18dBm
Tape player section
Recording system
4-track 2-channel stereo
Frequency response (DOLBY NR OFF)
40 ­ 13,000Hz (±3dB),
using a Sony TYPE I
cassette
40 ­ 14,000Hz (±3dB),
using a Sony TYPE II
cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
(2 band model)
North American model: 87.5 ­ 108.0 MHz
(100 kHz step)
Other models:
87.5 ­ 108.0 MHz
(50 kHz step)
(3 band model)
FM:
87.5 ­ 108.0 MHz
(50 kHz step)
UKV:
65.0 ­ 74.0 MHz
(10kHz step) STEREO PLUS
Antenna
FM wire antenna
Antenna terminals
75
unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
North American model: 530 ­ 1,710 kHz
(with the tuning interval set at 10 kHz)
531 ­ 1,710 kHz
(with the tuning interval set at 9 kHz)
European model:
531 ­ 1,602 kHz
(with the tuning interval set at 9 kHz)
Middle Eastern model:
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 ­ 1,710 kHz
(with the tuning interval set at 10 kHz)
Antenna
AM loop antenna terminals
Intermediate frequency 450 kHz
General
Power requirements
North American model: 120 V AC, 60 Hz
Mexican model:
120 V AC, 50/60 Hz
Australian model:
230 ­ 240 V AC, 50/60 Hz
Other models:
120 V, 220V, or 230 ­ 240 V AC, 50/60 Hz
Adjustable with voltage selector
Power consumption
(LBT-DR8AV)
260 W
(LBT-W900AV)
190 W
Dimensions (w/h/d)
Approx. 356
× 423 × 446 mm
(141/8
× 163/4 × 175/8 in) incl. projecting
parts and controls
Mass
(LBT-DR8AV)
Approx. 15.0 kg (33 lb 2 oz.)
(LBT-W900AV)
Approx. 13.5 kg (29 lb 13 oz.)
Supplied accessories
AM loop antenna (1)
Remote RM-SR11AV (1)
R6 (size AA) batteries (2)
FM wire antenna (1)
Speaker cords (2)
Design and specifications are subject to change without notice.


background image
-- 3 --
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
! OR DOTTED LINE WITH
MARK
! 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.
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, "metallized" knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers' instructions to use these
instruments.
2.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The "limit" indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
(US model only)
To Exposed Metal
Parts on Set
0.15
µF
1.5 k
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.
Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
· Keep the temperature of soldering iron around 270°C
during repairing.
· Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
· Be careful not to apply force on the conductor when soldering
or unsoldering.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE
! SUR LES
DIAGRAMMES SCHÉMA TIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT . NE
REMPLACER CES COMPOSANTS Q UE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS D ANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS P AR SONY.


background image
-- 4 --
PARTS No.
MODEL
4-214-785-5
W900AV: US
4-214-785-6
W900AV: CND
4-214-790-0
DR8AV: E, AR
4-214-790-1
DR8AV: SP
4-214-790-2
DR8AV: MX
4-214-790-3
DR8AV: EA
4-214-790-4
DR8AV: AUS
MODEL IDENTIFICATION
-- BACK PANEL --
· Abbreviation
CND : Canadian model
AUS : Australian model
EA
: Saudi Arabia model
MX
: Mexican model
SP
: Singapore model
AR
: Argentina model
Parts No.
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 pick-
up 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.
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.


background image
-- 5 --
TABLE OF CONTENTS
7-15. Printed Wiring Board
Power Section
(DR8AV model) ································································ 61
7-16. Schematic Diagram
Power (1/2) Section
(W900AV model) ····························································· 63
7-17. Schematic Diagram
Power (2/2) Section
(W900AV model) ····························································· 65
7-18. Printed Wiring Board
Power Section
(W900AV model) ····························································· 67
7-19. Schematic Diagram
FL Section ···································· 69
7-20. Printed Wiring Board
FL Section ································· 71
7-21. Schematic Diagram
Panel VR Section ························· 73
7-22. Printed Wiring Board
Panel VR Section ······················ 75
7-23. Schematic Diagram
TC Panel Section ························· 77
7-24. Printed Wiring Board
TC Panel Section ······················· 79
7-25. Schematic Diagram
CD Panel Section ························· 81
7-26. Printed Wiring Board
CD Panel Section ······················ 83
7-27. Schematic Diagram
CD Motor Section ························ 85
7-28. Printed Wiring Board
CD Motor Section ····················· 87
7-29. Schematic Diagram
Jack Section ································· 89
7-30. Printed Wiring Board
Jack Section ······························ 91
7-31. Schematic Diagram
Trans Section
(W900AV model) ····························································· 93
7-32. Printed Wiring Board
Trans Section
(W900AV model) ····························································· 95
7-33. Schematic Diagram
Trans Section
(DR8AV model) ································································ 97
7-34. Printed Wiring Board
Trans Section
(DR8AV model) ································································ 99
7-35. Schematic Diagram
Leaf SW Section ························ 100
7-36. Printed Wiring Board
Leaf SW Section ····················· 100
7-37. Schematic Diagram
Surround Section ······················· 101
7-38. Printed Wiring Board
Surround Section ····················· 101
7-39. IC Block Diagrams ························································· 103
7-40. IC Pin Functions ····························································· 104
8. EXPLODED VIEWS
8-1.
Case and Back Panel Section ········································· 107
8-2.
Front Panel Section 1 ····················································· 108
8-3.
Front Panel Section 2 ····················································· 109
8-4.
Chassis Section ······························································· 110
8-5.
TC Mechanism Section 1 (TCM230AWR2/230PWR2) 111
8-6.
TC Mechanism Section 2 (TCM230AWR2/230PWR2) 112
8-7.
CD Mechanism Section (CDM37M-5BD32L) ·············· 113
8-8.
Base Unit Section (BU-5BD32L) ··································· 114
9. ELECTRICAL PARTS LIST ····································· 115
1. SERVICING NOTE ·························································· 4
2. GENERAL ·········································································· 6
3. DISASSEMBLY
3-1.
Front Panel ········································································· 8
3-2.
Main Board ········································································· 8
3-3.
Sub Panel ············································································ 9
3-4.
CD-L/CD-R Board and CD Lid Assembly ························· 9
3-5.
Tape Mechanism Deck and Cassette Lid ·························· 10
3-6.
CD Mechanism Deck ······················································· 10
3-7.
Base Unit ·········································································· 10
3-8.
Disc Table ········································································· 11
4. SERVICE MODE ···························································· 12
5. MECHANICAL ADJUSTMENTS ····························· 15
6. ELECTRICAL ADJUSTMENTS ······························· 15
7. DIAGRAMS
7-1.
Circuit Boards Location ··················································· 19
7-2.
Block Diagrams
BD Section ······································································· 21
Deck Section ····································································· 23
Main (1/2) Section ···························································· 25
Main (2/2) Section ···························································· 27
Power Section (DR8AV model) ······································· 29
Power Section (W900AV model) ····································· 31
Display Section ································································· 33
7-3.
Printed Wiring Board
BD Section ································ 37
7-4.
Schematic Diagram
BD WSection ······························· 39
7-5.
Printed Wiring Board
Main Section ····························· 41
7-6.
Schematic Diagram
Main (1/5) Section ······················· 43
7-7.
Schematic Diagram
Main (2/5) Section ······················· 45
7-8.
Schematic Diagram
Main (3/5) Section ······················· 47
7-9.
Schematic Diagram
Main (4/5) Section ······················· 49
7-10. Schematic Diagram
Main (5/5) Section ······················· 51
7-11. Schematic Diagram
Deck Section ································ 53
7-12. Printed Wiring Board
Deck Section ····························· 55
7-13. Schematic Diagram
Power (1/2) Section
(DR8AV model) ································································ 57
7-14. Schematic Diagram
Power (2/2) Section
(DR8AV model) ································································ 59