Sony HCD-VR90AV User manual

HCD-VR90AV
E Model SERVICE MANUAL
COMPACT Hi-Fi STEREO SYSTEM
MICROFILM
SPECIFICATIONS
HCD-VR90AV is the tuner, deck, CD and ampli-
fier section in LBT-VR90AV.
Model Name Using Similar Mechanism HCD-VR50/VR70
CD Mechanism Type CDM37L-5BD34L
Base Unit Name BU-5BD34L
Optical Pick-up Name KSS-213D/Q-NP
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type TCM-230AWR2/230PWR2
CD
Section
Tape deck
Section
Amplifier section
Front Speaker:
The following measured atAC 120/220/240V, 50/60Hz
DIN power output (Rated) 130 + 130W
(6 Ωat 1 kHz, DIN)
Continuous RMS power output (Reference)
160 +160W
(6 Ωat 1 kHz, 10% THD)
Center Speaker:
DIN power output (Rated) 30W
(8 Ωat 1 kHz, DIN)
Continuous RMS power output (Reference)
40W
(8 Ωat 1 kHz, 10% THD)
Rear Speaker:
DIN power output (Rated) 30 + 30W
(8 Ωat 1 kHz, DIN)
Continuous RMS power output (Reference)
40 + 40W
(8 Ωat 1 kHz, 10% THD)
Inputs
PHONO IN (phono jacks): sensitivity 3mV,
impedance 47k Ω
MIX MIC (phone jack): sensitivity 1mV,
impedance 10k Ω
VIDEO1 IN (phono jacks): sensitivity 250mV,
impedance 47k Ω
VIDEO2 IN (phono jacks): sensitivity 250mV,
impedance 47k Ω
MD IN (phono jacks): sensitivity 450mV,
impedance 47k Ω
DVD INPUT
FRONT (phono jacks): sensitivity 450mV,
impedance 47k Ω
REAR (phono jacks): sensitivity 450mV,
impedance 47k Ω
CENTER (phono jacks): sensitivity 450mV,
impedance 47k Ω
WOOFER (phono jacks): sensitivity 450mV,
impedance 47k Ω
Outputs
PHONES (stereo phone jack):accepts headphones of
8 Ωor more
VIDEO OUT (phono jack): voltage 250mV,
impedance 1k Ω
MD OUT (phono jacks): voltage 250mV,
impedance 1k Ω
WOOFER OUT (phono jack):voltage 1V,
impedance 1k Ω
FRONT SPEAKER: accepts impedance of 8
to 16 Ω
CENTER SPEAKER: accepts impedance of 8
to 16 Ω
REAR SPEAKER: accepts impedance of 8
to 16 Ω
— Continued on next page —
Video section
Inputs
VIDEO1 IN (phono jacks): 1Vp-p, 75 Ω
VIDEO2 IN (phono jacks): 1Vp-p, 75 Ω
DVD INPUT VIDEO (phono jacks):
1Vp-p, 75 Ω
Output
VIDEO OUT (phono jack): 1Vp-p, 75 Ω
S-VIDEO OUT (4-pin/mini-DIN jack):
Y : 1Vp-p, unbalanced,
Sync negative,
C : 0.286 V p-p,
load immpedance
75 Ω

2
VIDEO CD/CD player section
System Compact disc and digital audio and video system
Laser Semiconductor laser
(λ=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.
Wave length 780 – 790 nm
Frequency response 2Hz – 20kHz (±0.5dB)
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
Video color system format
NTSC, PAL
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
Wow and flutter ±0.15% W.Peak (IEC)
0.1% W.RMS (NAB)
±0.2% W.Peak (DIN)
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 kHz
(100 kHz step)
Antenna FM wire antenna
Antenna terminals 75 Ωunbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
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, External antenna terminals
Intermediate frequency 450 kHz
General
Power requirements
Thai model : 220 V AC, 50/60 Hz
Other models : 120 V, 220V, or 230 – 240V AC, 50/60 Hz
Adjustable with voltage selector
Power consumption 280 W
Dimensions (w/h/d) Approx. 356 ×423 ×446 mm
incl. projecting parts and controls
Mass Approx. 15.0 kg
Supplied accessories AM loop antenna (1)
Remote RM-SV100AVB (1)
R6 (size AA) batteries (2)
FM wire antenna (1)
Speaker cords (2)
Video connecting cable
Design and specifications are subject to change without notice.

3
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH
MARK !ON THE SCHEMATIC DIAGRAMS AND INTHE 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.
This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.
The following caution label is located inside the unit.
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
otherthan those specifiedherein mayresultin hazardousradiation
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.
MODEL IDENTIFICATION
— BACK PANEL —
• Abbreviation
IA : Indonesia model
EA : Saudi Arabia model
MY : Malaysia model
SP : Singapore model
TH : Thai model
Parts No.
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,
observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curvecheck” in“CD section adjustment” and check
that the S curve waveform is output four times.
PARTS No. MODEL
4-214-793-0πMY,SP
4-214-793-1πEA
4-214-793-3πIA
4-214-793-4πTH

4
TABLE OF CONTENTS
6-15. Schematic Diagram Deck Section ································ 40
6-16. Printed Wiring Board Deck Section ·····························41
6-17. Printed Wiring Board Power Section ··························· 42
6-18. Schematic Diagram Power (1/2) Section ····················· 43
6-19. Schematic Diagram Power (2/2) Section ····················· 44
6-20. Schematic Diagram Surround Section ························· 45
6-21. Printed Wiring Board Surround Section······················· 45
6-22. Schematic Diagram FL Section···································· 46
6-23. Printed Wiring Board FL Section ·································47
6-24. Schematic Diagram Panel VR Section ························· 48
6-25. Printed Wiring Board Panel VR Section ······················ 49
6-26. Schematic Diagram TC Panel Section ························· 50
6-27. Printed Wiring Board TC Panel Section······················· 51
6-28. Schematic Diagram CD Panel Section ························· 52
6-29. Printed Wiring Board CD Panel Section ······················ 53
6-30. Schematic Diagram CD Motor Section ························ 54
6-31. Printed Wiring Board CD Motor Section ····················· 55
6-32. Schematic Diagram Jack Section ································· 56
6-33. Printed Wiring Board Jack Section ······························ 57
6-34. Schematic Diagram Trans Section ······························· 58
6-35. Printed Wiring Board Trans Section····························· 59
6-36. Schematic Diagram Leaf SW Section ·························· 59
6-37. Printed Wiring Board Leaf SW Section ······················· 59
6-38. IC Block Diagrams ··························································· 60
6-39. IC Pin Functions ······························································· 61
7. EXPLODEDVIEWS
7-1. Case and Back Panel Section ··········································· 69
7-2. Front Panel Section 1 ······················································· 70
7-3. Front Panel Section 2 ······················································· 71
7-4. Chassis Section ································································· 72
7-5. TC Mechanism Section 1 (TCM230AWR2/230PWR2) ·· 73
7-6. TC Mechanism Section 2 (TCM230AWR2/230PWR2) ·· 74
7-7. CD Mechanism Section (CDM37M-5BD32L) ················ 75
7-8. Base Unit Section (BU-5BD32L)····································· 76
8. ELECTRICAL PARTS LIST······································· 77
1. GENERAL ·········································································· 5
2. DISASSEMBLY
2-1. Front Panel ········································································· 7
2-2. Main Board ········································································· 7
2-3. Sub Panel ············································································ 8
2-4. CD-L/CD-R Board and CD Lid Assembly························· 8
2-5. Tape Mechanism Deck and Cassette Lid····························9
2-6. CD Mechanism Deck ························································· 9
2-7. Base Unit ············································································ 9
2-8. Disc Table ········································································· 10
3. SERVICE MODE ···························································· 11
4. MECHANICAL ADJUSTMENTS ····························· 15
5. ELECTRICAL ADJUSTMENTS ······························· 15
6. DIAGRAMS
6-1. Circuit Boards Location ··················································· 19
6-2. Block Diagrams
BD Section ······································································· 20
Video Section ··································································· 21
Deck Section····································································· 22
Main (1/2) Section···························································· 23
Main (2/2) Section···························································· 24
Power Section ··································································· 25
Display Section································································· 26
6-3. Printed Wiring Board BD Section ································ 28
6-4. Schematic Diagram BD Section··································· 29
6-5. Printed Wiring Board Video Section ···························· 30
6-6. Schematic Diagram Video (1/3) Section ······················ 31
6-7. Schematic Diagram Video (2/3) Section ······················ 32
6-8. Schematic Diagram Video (3/3) Section ······················ 33
6-9. Printed Wiring Board Main Section ····························· 34
6-10. Schematic Diagram Main (1/5) Section ······················· 35
6-11. Schematic Diagram Main (2/5) Section ······················· 36
6-12. Schematic Diagram Main (3/5) Section ······················· 37
6-13. Schematic Diagram Main (4/5) Section ······················· 38
6-14. Schematic Diagram Main (5/5) Section ······················· 39

5
SECTION 1
GENERAL
Location of Parts and Controls
11/u (Power) button
2POWER SAVE/DEMO (STANDBY)
button
3DISPLAY button
4SPECTRUM ANALYZER button
5Display window
6GEQ control button
7SYNC BASS button
8SYNC EQ button
9Remote sensor
0TUNING MODE button
!¡ STEREO/MONO button
!™ ENTER/NEXT button
!£ TUNER MEMORY button
!¢ TUNER/BAND button
!∞ TUNING - button
!§ TUNING + button
!¶ FUNCTION button
!• VOLUME knob
!ª PHONES jack
@º ECHO LEVEL knob
@¡ MIC LEVEL knob
@™ MIC 1 jack
@£ MIC 2 jack
@¢ GROOVE button
@∞ SUPER WOOFER button
@§ MODE button
@¶ ª(B Deck) button and indicator
@• ·(B Deck) button and indicator
@ª p(B Deck) button
#º 0(B Deck) button
#¡ )(B Deck) button
#™ P(B Deck) button
#£ rREC (B Deck) button
#¢ HI-SPEED DUB button
#∞ CD SYNCHRO button
#§ PLAY MODE button
#¶ REPEAT button
#• 0(CD) button
#ª )(CD) button
$º ·P (CD) button and indicator
$¡ p(CD) button
$™ DISC SKIP button
$£ =AMS +knob
$¢ VIDEO2 INPUT jacks
$∞ PRO LOGIC button and indicator
$§ DVD 5.1 CH
$¶ KEY CONTROL # button
$• KEY CONTROL b button
$ª EDIT button
%º NON-STOP button and indicator
%¡ FLASH button
%™ LOOP button
%£ NEXT button
%¢ PREV button
%∞ RETURN button
%§ DISC 5 button
%¶ DISC 4 button
%• DISC 3 button
%ª DISC 2 button
^º DISC 1 button
^¡ SELECT button
^™ ACTIVE button
^£ DOLBY NR button
^¢ DIRECTION button
^∞ )(A Deck) button
^§ 0(A Deck) button
^¶ p(A Deck) button
^• ·(A Deck) button
^ª ª(A Deck) button
&º KARAOKE PON/MPX button
&¡ DSP button and indicator
&™ EFFECT button and indicator
&£ ENTER button and indicator
&¢ GEQ CONTROL button
&∞ P. FILE MEMORY
&§ Equalizer indicators
&¶ t/CLOCK SET button
&• SLEEP button
&ª REC button and indicator
*º DAILY button and indicator
• AMS is the abbreviation for Automatic
Music Sensor.
Front Panel
234
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6
This section is extracted
from instruction manual.

7
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. FRONT PANEL
2-2. MAIN BOARD
1 Three flat type wires
(CN303,CN304,CN431)
2 Connector (CN702)
3 Connector (CN452)
4 Connector (CN802)
7 Front panel
5 Screw (BVTP 3x8
)
6 Four screw (BVTP 3x8)
4 Connector (CN412)
5 Flat type wire (CN411)
1 Flat type wire (CN1
)
3 Tuner unit
2 Two screws (BVTP 3x8)
7 Seven screws (BVTP 3x8)
!¡ Fan motor
!™ Power cord
!£ Back panel
8 Five screws (BVTP 3x8)
6 Connector (CN903)
!§ Main board
!¢ Two screws (BVTP 3x8
)
0 Two screws (BVTP 3x8)
9 Four screws (BVTP 3x8)

8
2-3. SUB PANEL
2-4. CD-L/CD-R BOARD AND CD LID ASSEMBLY
3 Open the CD lid assembly
8 Sub panel block
4 Two screws (BTP 2.6x6)
1 Two screws (BVTP 2.6x8)
6 Two screws (BVTP 2.6x8)
7 Three screws (BVTP 2.6x8)
5 Screw (BVTP 3x8)
2 Front input board
9 Two screws (BVTP 2.6x8)
0 Bracket (CD-R2)
!£ CD lid assembly
1 Three screws (BVTP 2.6x8)
7 Three screws
(BVTP 2.6x8)
8 Two screws (BVTP 2.6x8)
9 Bracket (CD-R)
0 CD-R board
2 Three screws
(BVTP 2.6x8)
3 Bracket (CD-L)
4 CD-L board
!™ Torsion spring (CD-L)
Torsion spring (CD-L) Sub panel assembly
Sub panel assembly
CD lid assembly
5 Knob (CD)
6 Nut
!¡ Torsion spring (CD-R)

9
2-5.TAPE MECHANISM DECK AND CASSETTE LID
2-6. CD MECHANISM DECK 2-7. BASE UNIT
5 Cassette lid (B) assembly
(Refer to upper figure)
7 Holder (B) assembly
(Refer to lower figure)
6 Holder (A) assembly
(Refer to lower figure)
4 Cassette lid (A) assembly
(Refer to upper figure)
Cassette lid assembly
Holder assembly
Claw
Claw
Claw
Claw
8 Torsion spring (TC-A)
9 Torsion spring (TC-B)
1 Three screws (BVTP 2.6x8)
2 Three screw
s
(BVTP 2.6x8
)
3 Tape mechanism
Portion B
Portion B
Portion A
Portion A
1 Five screws (BVTP3x8)
2 CD mechanism
deck
3 Base uni
t
1 Yoke fitting
2 Boss

10
2-8. DISCTABLE
Note:
When the disc table is installed, adjust the positions of
roller cam and mark ”as shown in the figure, then set to
the groove of disc table.
A
A
2 Screw (BVTP3X8)
1 Screw (BVTP3X8)
4 Stop screw
5 Disc table
3 Bracket (BU)