Sony HCD-GRX9900 User manual

MICROFILM
SERVICE MANUAL
MINI Hi-Fi COMPONENT SYSTEM
US Model
AEP Model
UK Model
HCD-RXD9
E Model
HCD-GRX9900
SPECIFICATIONS
HCD-GRX9900/RXD9
Photo: HCD-RXD9 (US model)
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol aare trade-
marks of Dolby Laboratories Licensing Corporation.
HCD-GRX9900/RDX9 are the Amplifier,
CD player,Tape Deck andTuner section
in MHC-GRX9900/RXD9.
Amplifier section
US model:
AEP and UK models:
DIN power output (rated) 120 + 120 watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
150 + 150 watts
(8 ohms at 1 kHz, 10% THD)
Music power output (reference) 275 + 275 watts
(8 ohms at 1 kHz, 10% THD)
E models:
The following measured atAC 120, 220, 240 V 50/60 Hz
DIN power output (rated) 200 + 200 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
250 + 250 watts
(6 ohms at 1 kHz, 10% THD)
– Continued on next page –
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM38LH-5BD32L
Base Unit Name BU-5BD32L
Optical Pick-up Name KSS-213D/Q-NP
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type TCM-230AWR2
CD
Section
Tape deck
Section

– 2 –
Specifications (continued)
Inputs
MD/VIDEO (AUDIO) IN: voltage 450 mV/250mV,
(phono jacks) impedance 47 kilohms
MIX MIC: (phone jack) sensitivity 1 mV, impedance 10
kilohms
Outputs
MD OUT: voltage 250 mV,
(phono jacks) impedance 1 kilohms
PHONES: accepts headphones of 8 ohms
(stereo phone jack) or more
SPEAKER:
E models: accepts impedance of 6 to 16 ohms
Other models: accepts impedance of 8 to 16 ohms
SUPER WOOFER (GRX9900/RXD9: US models):
Voltage 1 V, impedance 1 kilohm
CD player section
System Compact disc and digital audio system
Laser Semiconductor laser (λ=780nm)
Emission duration: continuous
Laser output Max. 44.6 µW*
*This output is the value measured at
distance of 200 mm from the objective
lens surface on the Optical Pick-up
Block with 7 mm aperture.
Frequency response 2 Hz - 20 kHz (±0.5 dB)
Wavelength 780 -790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
CD OPTICAL 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 40 - 13,000 Hz (±3 dB),
(DOLBY NR OFF) using Sony TYPE I cassette
40 - 14,000 Hz (±3 dB),
using Sony TYPE II 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 ohm unbalanced
Intermediate frequency 10.7 MHz
UKV tuner section (3 band (FM-AM-UKV) models only)
Tuning range 65.0 - 74.0 MHz
Stereo Plus
AM tuner section
Tuning range
2 Band type:
US model: 530 - 1,710 kHz
(with the interval set at 10 kHz)
531 - 1,710 kHz
(with the interval set at 9 kHz)
AEP and UK models: 531 - 1,602 kHz
(with the interval set at 9 kHz)
Other models: 531 - 1,602 kHz
(with the interval set at 9 kHz)
530 - 1,710 kHz
(with the interval set at 10 kHz)
3 Band type:
Saudi Arabia model:
MW: 531 - 1,602 kHz
(with the interval set at 9 kHz)
SW: 5.95 - 17.90 MHz
(with the interval set at 5 kHz)
Other models:
MW: 531 - 1,602 kHz
(with the interval set at 9 kHz)
530 - 1,710 kHz
(with the interval set at 10 kHz)
SW: 5.95 - 17.90 MHz
(with the interval set at 5 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
US model: 120 V AC, 60 Hz
AEP and UK models: 230 V AC, 50/60 Hz
Mexican model: 120 V AC, 50/60 Hz
Other models: 120 V, 220 V, or 230 - 240 VAC,
50/60 Hz
Adjustable with voltage selector
Power consumption
US model: 170 watts
AEP and UK models: 180 watts
Other models: 240 watts
Dimensions (w/h/d) Approx. 280 ×360 ×395 mm
(131/8 ×141/4× 155/8in.)
Mass
US model: Approx. 10.6 kg (23 lb 6 oz.)
AEP and UK models: Approx. 10.8 kg
Other models: Approx. 12.2 kg
Supplied accessories: AM loop antenna (1)
Remote Commander (1)
Batteries (2)
FM lead antenna (1)
Speaker cords (2)
Front speaker pads (8)
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 PUB-
LISHED BY SONY.

– 3 –
1. SERVICING NOTES ............................................... 3
2. GENERAL
Location of Controls ....................................................... 6
Setting the Time .............................................................. 7
3. DISASSEMBLY ......................................................... 8
4. TEST MODE.............................................................. 11
5. MECHANICAL ADJUSTMENTS....................... 14
6. ELECTRICAL ADJUSTMENTS
DECK Section ................................................................. 14
CD Section ...................................................................... 17
7. DIAGRAMS
7-1. Block Diagram – CD SERVO Section – ........................ 19
7-2. Block Diagram – TAPE DECK Section – ...................... 21
7-3. Block Diagram – MAIN Section – ................................. 23
7-4. Block Diagram – DISPLAY/KEY CONTROL/
POWER SUPPLY Section – ........................................... 25
7-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 27
7-6. Printed Wiring Board – BD Board – .............................. 29
7-7. Schematic Diagram – BD Board – ................................ 31
7-8. Printed Wiring Boards – CD MOTOR Section –.......... 33
7-9. Schematic Diagram – CD MOTOR Section – .............. 35
7-10. Printed Wiring Board – AUDIO Board – ...................... 37
7-11. Schematic Diagram – AUDIO Board – ......................... 39
7-12. Printed Wiring Board – LEAF SW Board –.................. 41
7-13. Schematic Diagram – LEAF SW Board –..................... 41
7-14. Printed Wiring Board – MAIN Board – ........................ 43
7-15. Schematic Diagram – MAIN Board (1/4) – .................. 45
7-16. Schematic Diagram – MAIN Board (2/4) – .................. 47
7-17. Schematic Diagram – MAIN Board (3/4) – .................. 49
7-18. Schematic Diagram – MAIN Board (4/4) – .................. 51
7-19. Printed Wiring Board – PANEL/CD SW Board – ........ 53
7-20. Schematic Diagram
– PANEL (1/3)/CD SW Board –..................................... 55
7-21. Schematic Diagram – PANEL (2/3) Board – ................ 57
7-22. Schematic Diagram – PANEL (3/3) Board – ................ 59
7-23. Printed Wiring Board – TRANS Board –....................... 61
7-24. Schematic Diagram – TRANS Board –......................... 62
7-25. Printed Wiring Board
– SUB TRANS Board (RXD9) –.................................... 63
7-26. Schematic Diagram
– SUB TRANS Board (RXD9) –.................................... 64
7-27. IC Pin Function Description ........................................... 69
8. EXPLODED VIEWS ................................................ 74
9. ELECTRICAL PARTS LIST ............................... 83
TABLE OF CONTENTS SECTION 1 SERVICING NOTES
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µ FAC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check 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 TEST
TheAC 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 microampers.).
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-operatedAC 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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2V AC range are suit-
able. (See Fig. A)

– 4 –
MODEL PART No.
Argentine and 120 V AC Area in E models 4-214-457-0π
Saudi Arabia model 4-214-457-1π
Singapore and Malaysia models 4-214-457-2π
Mexican model 4-214-457-3π
AEP, UK, German and
North European models 4-214-457-5π
CIS model 4-214-457-6π
US model 4-214-457-7π
240 V AC Area in E model 4-214-457-8π
PART No.
MODEL IDENTIFICATION
– Rear Panel –
The laser diode in the optical pick-up block may suffer electro-
static 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 emis-
sion, 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 ra-
diation 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.
CAUTION : INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL : USYNLIG LASERSTRÅLING VED ÅBNING NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE
FOR STRÅLING.
VORSICHT : UNSICHTBARE LASERSTRAHLUNG, WENN
ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG
ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.
VARO ! : AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-
TIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.
VARNING : OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD
OCH SPÄRREN ÄR URKOPPLAD.BETRAKTA EJ STRÅLEN.
ADVERSEL : USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG
SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
VIGYAZAT ! : A BURKOLAT NYITÁSAKOR LÁTHATATLAN LÉZERSU-
GÁRVESZÉLY
! KERÜLJE A BESUGÁRZÁST !

– 5 –
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.
NOTE FOR INSTALLATION (ROTARY ENCODER)
BU cam
Groove Section A
Note:When attaching the Base unit, Insert th
e
section A into the groove of BU cam.
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.
1 Remove the Cover.(Refer to page 8)
3 Pull-out the disc tray.
2 Turn the cam to the
direction of arrow.

– 6 –
SECTION 2
GENERAL This section is extracted from
instruction manual.
LOCATION OF CONTOROLS
– Front Panel –
– Rear Panel –
123
5
4
6
8
1CD DIGITAL OUT terminal
2VIDEO (AUDIO) IN jack
3FM COAXIAL ANTENNA terminal
(RXD9: AEP and UK models)
FM ANTENNA terminal
(GRX9900/RXD9: US models)
4MD IN/OUT jack
5SUPER WOOFER jack
(GRX9900/RXD9: US models)
6SPEAKER terminal
7AM ANTENNA terminal
8VOLTAGE SELECTOR switch
(GRX9900: 120V AC Area in E, 240 V AC Area in E, Saudi
Arabia, Singapore, Malaysia, Argentine models)
7

– 7 –

– 8 –
CASE
LOADING PANEL ASS’Y
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
3 two screws
(case3 TP2) (3 × 8)
2 screw
(case3 TP2) (3 × 12)
1 five screws
(BVTT3 × 8)
6 case
2 screw
(case3 TP2) (3 × 12)
3 two screws
(case3 TP2) (3 × 8
)
5
4
4
3 loading panel ass’y
2 Pull-out
the disc tray.
1 Turn the cam-in the
direction of the arrow A .
A

– 9 –
FRONT PANEL SECTION
CD MECHANISM DECK SECTION (CDM38LH-5BD32L)
2 screw
(BVTT2.6
× 5
)
2 screw
(BVTT2.6
× 5)
5 screw
(BVTT3
× 10)
7 front panel section
5 screw
(BVTP3
× 10)
6 three screws
(BVTT3
× 6)
4 lug
3 two washers
4 lug
1 wire (flat type)
(15 core) (32 cm) (CN303)
1 wire (flat type) (17 core)
(CN304)
1 wire (flat type)
(23 core) (CN501)
1 screw
(BVTP3
× 10)
2 two screws
(BVTP3
× 8)
4 two connectors
(CN392, 393)
5 wire (flat type) (19 core)
(CN391)
1 screw
(BVTP3
× 10)
3 Remove the CD mechanism
deck (CDM38LH-5BD32L)
in the direction of arrows
A – B .
B
A

– 10 –
1 Push the cassette lid.
4 tape mechanism deck
section (TCM-230AWR2)
1 Push the cassette lid.
2 Open two
cassette lids.
3 two screws
(BVTP2.6
× 8)
3 three screws
(BVTP2.6
× 8)
3 five screws
(BVTP3
× 8
)
3 two screws
(BVTP3
× 8)
3 two screws
(BVTP3
× 8)
5 connector
(CN403)
2 connector
(CN901)
4 Remove the MAIN board
in the direction of the arrow.
1 wire (flat type)
13 core: GRX9900: E2, MX, AR/RXD9: US
15 core: GRX9900: E3, EA, MY, SP/
RXD9: AEP, UK
(CN371)
()
2 connector
(CN13)
(RXD9)
TAPE MECHANISM DECK SECTION (TCM-230AWR2)
MAIN BOARD
• Abbreviation
AR : Argentine model
E2 : 120V AC Area in E model
E3 : 240V AC Area in E model
EA :Saudi Arabia model
MX: Mexican model
MY: Malaysia model
SP : Singapore model