Sony HCD-RG88 User manual

SERVICE MANUAL
COMPACT DISC DECK RECEIVER
E Model
HCD-RG88
Ver 1.0 2002.03
9-873-655-01 Sony Corporation
2002C0500-1 Home Audio Company
C2002.03 Published by Sony Engineering Corporation
SPECIFICATIONS
HCD-RG88 is the amplifier, CD player,
tape deck and tuner section in MHC-
RG88.
– Continued on next page –
Model Name Using Similar Mechanism HCD-RG77
CD CD Mechanism Type CDM58E-30BD60C
Section Base Unit Name BU-30BD60C
Optical Pick-up Name A-MAX.3
TAPE Model Name Using Similar Mechanism HCD-RG77
Section Tape Transport Mechanism Type TCM-230AWR41CS
Amplifier section
The following are measured atAC 120, 220, 240V
50/60 Hz
DIN power output (rated) 160 + 160 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
210 + 210 watts
(6 ohms at 1 kHz,
10% THD)
Inputs
GAME (VIDEO): 1 Vp-p, 75 ohms
(phono jack)
GAME (AUDIO): Voltage 250 mV,
(phono jacks) impedance
47 kilohms
MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,
(phono jacks) impedance 47 kilohms
MIC: sensitivity 1 mV,
(phone jack) impedance 10 kilohms
Outputs
VIDEO OUT: max. output level 1 Vp-p,
(phono jacks) unbalanced, Sync.
negative load impedance
75 ohms
PHONES: accepts headphones of
(stereo mini jack) 8 ohms or more
FRONT SPEAKER: accepts impedance of 6 to
16 ohms
SURROUND SPEAKER: accepts impedance of
24 ohms or more
SUBWOOFER accept impedance of
8 ohms or more
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ=795nm)
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 2 Hz – 20 kHz (±0.5 dB)
Wave length 795 nm
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wave length 660 nm
Output Level –18 dBm
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassette

HCD-RG88
2
FM tuner section
Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohm unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Latin American models: 530 – 1,710 kHz
(with the interval set at 10
kHz)
531 – 1,710 kHz
(with the interval set at 9
kHz)
Middle Eastern 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)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
Mexican models: 120 V AC, 60 Hz
220 V AC, 50/60 Hz
Other models: 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. 280 x 360 x 445 mm
Mass : Approx. 13.1 kg
Design and specifications are subject to change
without notice.
Argentina models:
Tuner section
FM stereo, FM/AM superheterodyne tuner
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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE 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 PUB-
LISHED BY SONY.
The following caution label is located inside the unit.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.

HCD-RG88
3
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 4
2. GENERAL
Location of Controls ....................................................... 5
Setting the Clock............................................................. 6
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Top Case .......................................................................... 8
3-3. Loading Panel.................................................................. 8
3-4. CD Mechanism Deck (CDM58E-30BD60C)................. 9
3-5. Front Panel Section ......................................................... 9
3-6. Back Panel Section.......................................................... 10
3-7. MAIN Board ................................................................... 10
3-8. Base Unit (BU-30BD60C) .............................................. 11
3-9. DRIVER Board, MOTOR Board
and SENSOR (CD) Board .............................................. 11
3-10. Tape Mechanism Deck (TCM-230AWR41CS).............. 12
3-11. Belt .................................................................................. 12
3-12. SW board HEAD (A) Board
and HEAD (B) Board...................................................... 13
4. TEST MODE.............................................................. 14
5. MECHANICAL ADJUSTMENTS....................... 18
6. ELECTRICAL ADJUSTMENTS
Deck section .................................................................... 18
CD Section ...................................................................... 21
7. DIAGRAMS
7-1. Block Diagram – CD SERVO Section – ....................... 23
7-2. Block Diagram – TUNER/TAPE DECK Section – ...... 24
7-3. Block Diagram – MAIN Section – ................................ 25
7-4. Block Diagram – DISPLAY/KEY CONTROL/
POWER SUPPLY Section – ........................................... 26
7-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 27
7-6. Printed Wiring Board – BD Board – ............................. 28
7-7. Schematic Diagram – BD Board – ................................ 29
7-8. Printed Wiring Boards
– DRIVER/MOTOR/SENSOR (CD) Boards –.............. 30
7-9. Schematic Diagram
– DRIVER/MOTOR/SENSOR (CD) Boards –.............. 30
7-10. Printed Wiring Boards
– SW/HEAD (A)/HEAD (B) Boards – .......................... 31
7-11. Schematic Diagram – SW Board –................................ 32
7-12. Printed Wiring Board – MAIN Board – ........................ 33
7-13. Schematic Diagram – MAIN Board (1/4) – .................. 34
7-14. Schematic Diagram – MAIN Board (2/4) – .................. 35
7-15. Schematic Diagram
– MAIN (3/4)/HEAD (A)/HEAD (B) Boards –............. 36
7-16. Schematic Diagram – MAIN Board (4/4) – .................. 37
7-17. Printed Wiring Board – GAME IN Board –.................. 38
7-18. Schematic Diagram – GAME IN Board –..................... 39
7-19. Printed Wiring Board – SUB WOOFER Board – ......... 40
7-20. Schematic Diagram – SUB WOOFER Board – ............ 41
7-21. Printed Wiring Boards
– POWER/SENSOR Boards –........................................ 42
7-22. Schematic Diagram
– POWER/SENSOR Boards –........................................ 43
7-23. Printed Wiring Boards
– PANEL/CD OPEN/CD SWITCH Boards – ................ 44
7-24. Schematic Diagram
– PANEL/CD OPEN/CD SWITCH Boards – ................ 45
7-25. Printed Wiring Boards
– PAD SWITCH/VOL Boards – ..................................... 46
7-26. Schematic Diagram
– PAD SWITCH/VOL Boards – ..................................... 47
7-27. Printed Wiring Boards
– MAIN TRANS/SUB-TRANS Boards –...................... 48
7-28. Schematic Diagram
– MAIN TRANS/SUB-TRANS Boards –...................... 49
7-29. IC Pin Function Description ........................................... 51
8. EXPLODED VIEWS
8-1. Panel Section ................................................................... 55
8-2. Front Panel Section ......................................................... 56
8-3. Chassis Section ............................................................... 57
8-4. CD Mechanism Deck Section
(CDM58E-30BD60C) ..................................................... 58
8-5. Base Unit Section (BU-30BD60C)................................. 59
8-6. Tape Mechanism Deck Section
(TCM-230AWR41CS) .................................................... 60
9. ELECTRICAL PARTS LIST ............................... 61

4
HCD-RG88 SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.
•MODEL IDENTIFICATION
– Back Panel –
MODEL PART No.
E, Singapore, Chilean and
Peruvian models 4-237-780-2[]
Mexican and Argentina models 4-237-780-7[]
PART No.

5
HCD-RG88
SECTION 2
GENERAL This section is extracted from
instruction manual.
CD eg
CD SYNC HI-DUB qf
DECK AAwh
DECK BAqh
DIMMER 9
DIRECTIONq;
DISC 1~34
DISC SKIP EX-CHANGE 5
Disc tray3
DISPLAY 7
EDIT q;
EFFECT ON/OFF
rs
ENTER ra
FM MODE qs
GAME ea
GAME EQrd
GAME INPUT wd
GAME MIXING wl
GROOVE rf
IR (receptor)2
MD(VIDEO) es
MIC wa
MICLEVEL w;
MOVIE EQ ek
MUSIC EQeh
OPEN/CLOSE Z6
P FILE r;
PHONES jack ql
PLAY MODE e;
REC PAUSE/START qg
REPEAT qs
SPECTRUM 8
SURROUND el
SURROUND SPEAKER MODE wj
TAPE A/Bed
TUNER/BAND ef
TUNER MEMORY e;
VOLUME qa
BUTTON DESCRIPTIONS
@/1 1
hH ws
xqd
Xwk
>qj
.wg
M/+ qk
m/– wf
v/V/b/Bej
ALPHABETICAL ORDER
A - D
M - Q
123 4 56
7
8
90
qa
qs
qd qf
qg
qh
qj
qk
qlw;waws
wd
wf
wg
wh
wj
wk
wl
e;
ea es
eg
ed ef ejeh ek
el
rar;
rd rs
rf
E - L
R - Z
LOCATION OF CONTROLS
– Front Panel –

6
HCD-RG88
Remote Control
4
5
qk
ql
w;
wa
ws
123
wg
wf
wd
qh
qj
qa
qs
qd
qf
7
q;
qg
8
9
6
CD ql
CLEAR 7
CLOCK/TIMER SELECT2
CLOCK/TIMER SET3
D.SKIP 9
ENTER qd
EFFECT ON/OFF qf
GAME w;
MD (VIDEO) q;
PRESET –wd
PRESET +wf
PRESET EQ qj
P FILEqh
SURROUND SPEAKER MODE qs
SLEEP 1
TAPE A/Bqa
TUNER/BAND qk
TUNING – wa
TUNING + ws
VOL +/– 8
BUTTON DESCRIPTIONS
@/1 4
hH wg
X5
x6
.wd
>wf
mwa
Mws
v/V/b/Bqg
A - M
P - Z
ALPHABETICAL ORDER
Setting the clock
1Turn on the system.
2Press CLOCK/TIMER SET on the
remote.
When you set the time for the first time,
proceed to step 5.
3Press Vor vrepeatedly to select
CLOCK SET.
4Press ENTER.
5Press Vor vrepeatedly to set the hour.
6Press ENTER.
7Press Vor vrepeatedly to set the
minute.
8Press ENTER.
The clock starts functioning.
Tip
If you have made a mistake or want to change the
time, start over from step 2.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.

7
HCD-RG88
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-4. CD MECHANISM DECK
(CDM58E-30BD60C)
(Page 9)
3-3. LOADING PANEL
(Page 8)
3-2. TOP CASE
(Page 8)
3-5. FRONT PANEL SECTION
(Page 9)
3-6. BACK PANEL SECTION
(Page 10)
3-7. MAIN BOARD
(Page 10) 3-11.BELT (Page 12)
3-10.TAPE MECHANISM DECK
(TCM-230AWR41CS)
(Page 12)
3-9. DRIVER BOARD,
MOTOR BOARD AND
SENSOR (CD) BOARD
(Page 11)
3-8. BASE UNIT (BU-30BD60C)
(Page 11)
3-12.SW BOARD,
HEAD (A) BOARD AND
HEAD (B) BOARD
(Page 13)
SET

8
HCD-RG88
8
8
4
two screws (case 3 TP2)
5 two screws
(BVTP 3
× 10)
2 two screws
(BVTP 3
× 10)
1 three screws (case 3 TP2
)
4 screw (case 3TP2)
6 side panel (L)
3 side panel (R)
7 two screws
(BVTP 3
× 12)
9 top case
Note: Follow the disassembly procedure in the numerical order given.
3-2. TOP CASE
3-3. LOADING PANEL
2 Pull-out the disc table.
4 loading panel
1 Turn the pulley in the direction of the arrow.
Front panel side
CD mechanism deck (CDM58E-30BD60C)
3 four claws
–BOTTOM VIEW–

9
HCD-RG88
3 screw
(BVTP 3
× 10 )
3 screw
(BVTP 3
× 10 )
5 CD mechanism deck
(CDM58E-30BD60C)
1 wire (flat type)
(21 core)
(CN201
)
2 connector
(
CN202)
3-4. CD MECHANISM DECK (CDM58E-30BD60C)
3-5. FRONT PANEL SECTION
3 four screws
(BVTP 3
× 10 )
1 wire (flat type)
(17 core)
(CN304)
2 connector ( CN1)
2 connector ( CN2)
5 front panel section
2 connector
(
CN783)
2 connector
(
CN781)
4 connector
(
CN401)

10
HCD-RG88
1 two screws (BVTP 3 × 10)
5 main board
4 two claws
claw
main board
2 two connectors
(CN502, CN503)
3 connector (CN903)
3 connector (CN904)
6 five screws
(BVTP 3
× 10)
6 two screws
(BVTP 3
× 10)
6 four screws
(BVTP 3
× 10
)
2 screw
(BVTP 3
× 10)
5 connector (CN973)
4 connector (CN701)
7 back panel section
5 connector (CN891)
3 sensor board
5 connector (CN976)
1 wire (flat type) (11core)
(CN702)
5 connector (CN974)
3-6. BACK PANEL SECTION
3-7. MAIN BOARD