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Sony Corporation
Home Audio Company
COMPONENT MODEL NAME FOR MHC-GRX40AV/RXD6AV
MHC-GRX40AV/RXD6AV
SERVICE MANUAL
MICROFILM
SPECIFICATIONS
General
Power requirements
European model:
230 V AC, 50/60 Hz
Australian and South African model:
240 V AC, 50/60 Hz
Mexican model:
120 V AC, 50/60 Hz
Power consumption
190 watts
Dimensions (w/h/d)
Approx. 280 x 340 x 390 mm
(11 1/8 x 13 1/2 x 15 3/8 in)
Mass
Approx. 9.2 Kg (20 lbs. 5 oz.)
Supplied accessories:
AM loop antenna (1)
Remote (1)
FM lead antenna (1)
Speaker cords (2)
Center speaker pads (4)
Design and specifications are subject to change without notice.
ACCESSORIES & PACKING MATERIALS
*******************************
1-418-499-11
COMMANDER, REMOTE (RM-SG9AV)
1-501-374-11
ANTENNA, LOOP
1-501-594-11
ANTENNA (FM)
1-769-433-11
CORD, SPEAKER (10m) (SS-SR115)
3-866-222-11
MANUAL, INSTRUCTION (ENGLISH)
3-866-222-21
MANUAL, INSTRUCTION (FRENCH) (AEP)
3-866-222-31
MANUAL, INSTRUCTION (SPANISH) (AEP,MX)
3-866-222-41
MANUAL, INSTRUCTION (GERMAN) (AEP,G)
3-866-222-51
MANUAL, INSTRUCTION (DUTCH, ITALIAN,
PORTUGUESE) (AEP)
3-866-222-61
MANUAL, INSTRUCTION (SWEDISH,DANISH,
FINNISH) (AED)
3-866-222-71
MANUAL, INSTRUCTION (POLISH,RUSSIAN) (CIS)
3-866-672-11
MANUAL, INSTRUCTION (HUNGARIAN) (CIS)
3-866-672-21
MANUAL, INSTRUCTION (CZECH) (CIS)
3-866-672-31
MANUAL, INSTRUCTION (GREEK) (CIS)
3-866-672-41
MANUAL, INSTRUCTION (TURKISH) (CIS)
3-866-672-51
MANUAL, INSTRUCTION (SLOVAK) (CIS)
4-972-322-01
FOOT (Y) (SS-CN115)
4-982-031-01
BATTERY COVER (FOR RM-SG9AV)
PARTS LIST
9-928-984-11
MINI Hi-Fi COMPONENT SYSTEM
99F001671-1
Printed in Japan ©1999.6
Published by Quality Assurance Dept.
· MHC-GRX40AV/RXD6AV is composed of following models.
As for the service manual, it is issued for each component model,
then, please refer to them.
Ref. No. Part No.
Description
Remark
COMPACT DISC DECK RECEIVER SYSTEM
SPEAKER SYSTEM
FRONT SPEAKER
CENTER SPEAKER
REAR SPEAKER
MHC-GRX40AV
MHC-RXD6AV
HCD-GRX40AV
HCD-RXD6AV
SS-GRX40AV
SS-RXD6EAV
AEP Model
UK Model
MHC-RXD6AV
E Model
Australian Model
MHC-GRX40AV
· Abbreviation
G
: German model
MX : Mexican model
AED : North European model
SS-CN115
SS-SR115


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HCD-GRX40AV/RXD6AV
AEP Model
UK Model
HCD-RXD6AV
E Model
Australian Model
HCD-GRX40AV
SERVICE MANUAL
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
Manufactured under license from Dolby Laboratories
Licensing Corporation.
"DOLBY" and the double-D symbol
aare trademarks
of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism HCD-RXD3
CD
CD Mechanism Type
CX3
Section
Base Unit Name
KSM-213ECM
Optical Pick-up Name
KSS-213ECM/C2NP
Tape deck
Model Name Using Similar Mechanism HCD-RXD3
Section
Tape Transport Mechanism Type
CWL-44-RR
SPECIFICATIONS
HCD-GRX40AV/RXD6AV is the Amplifier,
CD player, Tape Deck and Tuner section
in MHC-GRX40AV/RXD6AV.
Amplifier section
MHC-RXD6AV (European model):
Front Speaker :
DIN power output (rated)50 + 50 W
(6
at 1 kHz, DIN)
Continuous RMS power output (reference)
60 + 60 W
(6
at 1 kHz, 10% THD)
Music power output (reference)
100 + 100 W
(6
at 1 kHz, 10% THD)
Center Surround Speaker :
DIN power output (rated) 25 W
(12
at 1 kHz, DIN)
Continuous RMS power output (reference)
30 W
(12
at 1 kHz, 10% THD)
Music power output (reference)
50 W
(12
at 1 kHz, 10% THD)
Rear Surround Speaker :
DIN power output (rated) 12.5 + 12.5 W
(6
at 1 kHz, DIN)
Continuous RMS power output (reference)
15 + 15 W
(6
at 1 kHz, 10% THD)
Music power output (reference)
25 + 25 W
(6
at 1 kHz, 10% THD)
MHC-GRX40AV (Other model):
The following measured at AC 120, 240 V, 50/60 Hz
Front Speaker :
DIN power output (rated)60 + 60 W
(6
at 1 kHz, DIN)
Continuous RMS power output (reference)
70 + 70 W
(6
at 1 kHz, 10% THD)
Center Surround Speaker :
DIN power output (rated) 25 W
(12
at 1 kHz, DIN)
Continuous RMS power output (reference)
30 W
(12
at 1 kHz, 10% THD)
Rear Surround Speaker :
DIN power output (rated) 12.5 + 12.5 W
(6
at 1 kHz, DIN)
Continuous RMS power output (reference)
15 + 15 W
(6
at 1 kHz, 10% THD)
Inputs
MD/VIDEO IN :
voltage 450 mV/250 mV
(phono jacks)
inpedance 47 k
Outputs
MD/VIDEO OUT :
voltage 250 mV
(phono jacks)
impedance 1 k
PHONES :
accepts headphones of 8
or
(stereo phone jack)
more
FRONT SPEAKER :
accepts impedance of 6 to 16
REAR SPEAKER :
accepts impedance of 6 to 16
CENTER SPEAKER :
accepts impedance of 12 to 16
SUPER WOOFER :
Voltage 1 V, impedance 1 k
CD player section
System
Compact disc and digital audio
system
Laser
Semiconductor laser (
=780nm)
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.
Frequency response
20 Hz - 20 kHz (±0.5 dB)
Wavelength
780 -790 nm
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 90 dB
Continued on next page
Photo : HCD-RXD6AV


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2
CD DIGITAL OUT
(Square optical connector jack, rear panel)
Wavelength
600 nm
Output Level
­18 dBm
Tape player section
Recording system
4-track 2-channel stereo
Frequency response
60 - 13,000 Hz (±3 dB),
(DOLBY NR OFF)
using Sony TYPE I cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
87.5 - 108.0 MHz
Antenna
FM lead antenna
Antenna terminals
75
unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
531 - 1,602 kHz
(with the interval set at 9 kHz)
530 - 1,710 kHz
(with the interval set at 10 kHz)
Antenna
AM loop antenna
Antenna terminals
External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
European model:
230 V AC, 50/60 Hz
Australian and South African models:
240 V AC, 50/60 Hz
Mexican model:
120 V AC, 50/60 Hz
Power consumption
190 W
Dimensions (w/h/d)
Approx. 280
× 340 × 390 mm
(111/8
× 131/2 × 153/8 in.)
Mass:
Approx. 9.2 kg
(20 lb 5 oz.)
Design and specifications are subject to change without notice.
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.


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3
SECTION 1
SERVICING NOTES
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.
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
· Keep the temperature of the soldering iron around 270 °C dur-
ing 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.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
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.
The following caution label is located inside the unit.
1.
SERVICING NOTES ··················································· 3
2.
GENERAL ······································································ 4
3.
DISASSEMBLY
3-1.
CD door ·············································································· 6
3-2.
CD Mechanism Deck ························································· 6
3-3.
Front Panel ········································································· 7
3-4.
Main Board ········································································· 7
3-5.
Key Board ··········································································· 8
3-6.
Mech Deck ········································································· 8
3-7.
Front Panel (B) ··································································· 9
3-8.
Front Board, H/P Board ······················································ 9
3-9.
Front AMP Board, AMP Board, Photo Socket Board, Fuse
Board ················································································ 10
3-10. CD Tray ············································································ 10
3-11. CD Decord Board ····························································· 11
3-12. Base Unit ·········································································· 12
3-13. Cassette Lid (A)/(B) ························································· 12
4.
TEST MODE ································································ 13
5.
MECHANICAL ADJUSTMENTS ·························· 14
6.
ELECTRICAL ADJUSTMENTS ··························· 14
7.
DIAGRAMS
7-1.
Block Diagrams
Tuner CD Section ························································ 19
Main Section ······························································· 20
7-2.
Circrit Boards Location ···················································· 21
7-3.
Printed Wiring Board
Main Section ······························ 22
7-4.
Schematic Diagram
Tuner Section ································ 23
7-5.
Schematic Diagram
Dolby Section ······························· 24
7-6.
Schematic Diagram
Tape Power Section ······················· 25
7-7.
Printed Wiring Board
Front Section ······························ 26
7-8.
Schematic Diagram
Front Section ································· 27
7-9.
Printed Wiring Board
FLD Section ······························· 28
7-10. Schematic Diagram
FLD Section ·································· 29
7-11. Printed Wiring Board
CD Section ································· 30
7-12. Schematic Diagram
CD Section ···································· 31
7-13. Printed Wiring Board
Center/Rear AMP Section ·········· 32
7-14. Schematic Diagram
Center/Rear AMP Section ············· 33
7-15. Schematic Diagram
Front AMP Section ······················· 34
7-16. Printed Wiring Board
Front AMP Section ···················· 35
7-17. IC Block Diagrams ··························································· 36
7-23. IC PIN Function Description ············································ 40
8.
EXPLODED VIEWS
8-1.
Cabinet Section ································································· 42
8-2.
Front Panel Section-1 ······················································· 43
8-3.
Front Panel Section-2 ······················································· 44
8-4.
CD Mechanism Deck Section-1 ······································· 45
8-5.
CD Mechanism Deck Section-2 ······································· 46
8-6.
Base Unit Section (KSM-213ECM) ································· 47
9.
ELECTRICAL PARTS LIST ··································· 48
TABLE OF CONTENTS


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4
SECTION 2
GENARAL
12
3
4
5
6
7
8
9
0
!TM
!
@TM
@
#
#TM
Fluorescent indicator tube
@
ENTER/NEXT button and indicator
REC button and indicator
PAUSE button
CD SYNC button
VOLUME knob
+,
) button and indicator
JOG dial
#TM
­,
0 button and indicator
TIMER SELECT button and indicator
CLOCK/TIMER SET button
#
DISPLAY button
DEMO button
GROOVE button and indicator
Remote sensor
1
1/u (Power) button and indicator
2
DISC 1 to 3 button and indicators
3
DISC SKIP button
4
§ (CD) button
5
CD disc tray
6
p button
7
CD,
^ button and indicator
8
TUNER/BAND button
9
FILE SELECT button
0
DBFB button
DSP button
!TM
§ (deck B)
Tape deck B
Tape deck A
!
§ (deck A)
DOLBY PRO LOGIC button
PHONES jack
REPEAT, STEREO/MONO button
PLAY MODE, TUNER MEMORY button
EDIT DIRECTION button
FUNCTION button
@TM
TAPE A,
9 and ( buttons and indications
TAPE B,
9 and ( buttons and indications