Sony FH-G50 User manual

FH-G50/MHC-501/$200
SERVICE MANUAL
FH-G50 and MHC-501/S200 are composed of following models.
As for the service manual, it is issued for each component models,
then, please refer to it.
COMPONENT MODEL NAME FOR FH-G50 and MHC-501/S200
US Model
Canadian Model
MHC-S200
AEP Model
MHC-501
Component
2°"
|__FH-G50
MHC-501
MHC-S200
_E
Model
Tuner,
deck,
|
HCD-H501
Australian
Model
CD,
amplifier
Tourist
Mode!
Speaker System | SS-H501 SS-H701 FH-G50
SPECIFICATIONS PARTS LIST (Accessories & Packing Materials)
Supplied accessories
AM loop antenna (1)
Remote commander (1)
Sony SUM-3 (NS) batteries (2)
FM lead antenna (1)
Design and specifications are subject to change
without notice.
@ Abbreviation
CND : Canadian MY: Malaysia
IT 3 Italian SP: Singapore
G: German MX: Mexican
EE :EastEuropean AR : Argentine
EA: Saudi Arabia JE: Tourist
AUS : Australian HK —: Hong Kong
MICROFILM
9-960-149-11
Sony Corporation
Consumer A&V Products Company
Home A&V Products Div.
NOTE:
@ Items marked “ * "are not stocked since they are
seldom required for routine service. Some delay
should be anticipated when ordering these items.
Part No. Description
1-473-039-11 COMMANDER, STANDARD (RM-S22)
1-501-374-11 ANTENNNA, LOOP
1-501-594-11 ANTENNNA, (FM) (501:EXCEPT G)
1-501-659-11 ANTENNNA, (FM) (G50, $200)
1-769-306-11 CORD, SPEAKER (FOR SS)
3-798-355-11 MANUAL, INSTRUCTION (ENGLISH) (S200:US, CND/G50: AUS)
3-798-355-41 MANUAL, INSTRUCTION (FRENCH) (S200:CND/G5O:E, BA, MY)
3-798-355-51 MANUAL, INSTRUCTION (ENGLISH/SPANISH/CHINESE)
(G50:E, BA, SP, MY, MX, HK, AR)
3-798-355-61 MANUAL, INSTRUCTION (ENGLISH/KOREAN/PORTUGUESE/
RUSSIAN) (G50: JE)
3-198-355-71 MANUAL, INSTRUCTION (ARABIC) (G50:E, BA)
3-198-356-41 MANUAL, INSTRUCTION acacia rhage
(501: AEP
3-798-356-51 MANUAL, INSTRUCTION (GERMAN) (501:G)
3-798-356-61 MANUAL, INSTRUCTION (ITALIAN) (501:ABP, IT)
3-798-356-71 MANUAL, INSTRUCTION (ENGLISH/GERMAN) (501:AEP, EE)
3-798~-356-81 MANUAL, INSTRUCTION (RUSSIAN/POLISH) (501:EE)
3-798-356-91 MANUAL, INSTRUCTION (DANISH, FINNISH, SWEDISH) (501: AEP)
4-941-762-01 COVER, BATTERY (FOR RM-S22)
% 4-971-217-01 CUSHION (FOR SS)
* 4-972-969-01 CUSHION (FRONT) (FOR HCD-501)
* 4-972-970-01 CUSHION (REAR) (FOR HCD-501)
4-972-973-01 INDIVIDUAL CARTON (S200)
4-972-974-01 INDIVIDUAL CARTON (501:EXCEPT EE)
4-972-975-01 INDIVIDUAL CARTON (5( )
4-972-976-01 INDIVIDUAL CARTON (G50:AUS)
4-972-977-01 INDIVIDUAL CARTON (G50:AR, B, HK, MX, MY, SP)
He ee
¥ 4-972-978-01 INDIVIDUAL CARTON (G50:EA, JE)
MINI Hi-Fi COMPONENT SYSTEM
SONY.
English
95B02102-1
Printed in Japan
4199.2
Published by Home A&V Products Div.
Quality Engineering Dept.

SERVICE MANUAL
@ HCD-H501 is the tuner, deck, CD
and amplifier section in FH-G50.
@ HCD-H501 is the tuner, deck, CD
and amplifier section in MHC-501
and MHC-S200.
HCD-H501
US Model
Canadian Model
AEP. Model
UK Model
E Model
Australian Model
Tourist Model
Photo : AEP Model
Dolby noise reduction manufactured under license from Model Name Using Similar Mechanism HOD-H801
Dolby Laboratories Licensing Corporation, cD .
“DOLBY” and the double-D symbol DO are trademarks of | section CD Mechanism Type CDM28-5BD19
Dolby Laboratories Licensing Corporation. Base Unit Name BU-5BD19
Tape deck |Model Name Using Similar Mechanism NEW
Section Tape Transport Mechanism Type TCM180VW-H13
SPECIFICATIONS
CD player section
System Compact disc digital audio
system
Laser Semiconductor laser
Wavelength 780-790. nm
Frequency response
2 Hz~20 kHz
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 -108.0 MHz (50 kHz
step for except US, Canadian, East European
model) (100kHz step for US, Canadian model)
FMI : 65- 74MHz (LOkHz step)
FM2 : 87.5- 108MHz
(East European model)
Antenna FM lead antenna
Antenna terminals
75 ohm unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
US, Canadian model :
AM : $30~ 1,710kHz (10kHz step)
AM : $31 1,710kHz (9kHz step)
AEP, UK, East European, German model :
MW : 531~ 1,602kHz (9kHz step)
LW : 153-279kHz
Italian model
MW : 522- 1,611kHz (9kHz step)
LW : 153-279kHz
E, Saudi Arabia, Argentine, Hong Kong, Mexican,
Malaysia, Singapore, Australian, Tourist model :
MW: 531 - 1,602 kHz
(9 kHz step)
530 - 1,710 kHz
(10kHz step)
SW: 5.95 - 17.9 kHz
(E, Saudi Arabia, Hong Kong, Tourist,
Malaysia, Singapore model)
AM loop aerial
External aerial terminals
Intermediate frequency
450 kHz
Tape player section
Recording system
4-track 2-channel stereo
Frequency response
(DOLBY NR OFF)
60 ~ 13,000 Hz (3 dB),
using Sony TYPE I cassette
60 - 14,000 Hz (£3 dB),
using Sony TYPE II cassette
Wow and flutter
0.1% WRMS +0.3% (DIN)
— Continued on page 2 ~
Antenna
COMPACT DISC DECK RECEIVER
SONY.

Amplifier section
Peak music power output:
400 W (2 speakers driven)
Continuous RMS power output
40 + 40 W (6 ohms at 1 kHz,
5% THD)
Inputs
MIX MIC (phone jack):
Sensitivity 1 mV,
impedance 600 ohms
AUX IN: Sensitivity 450 mV,
impedance 47 kilohms
Outputs
PHONES (stereo phone jack):
accept headphones of
8 ohms or more.
accept impedance of 6 to
16 ohms.
SPEAKER:
Speaker section
Speaker system
2-way system
Speaker units Woofer: 14 cm dia., cone
type
Tweeter: 5 cm dia. cone
type
Enclosure Bass reflex
Frequency range
60 Hz, - 20 kHz
Sensitivity 87 dB/W/m
Rated impedance
6 ohms
Dimensions _ Approx. 210 x 325 x
250 mm (w/h/d)
Mass Approx. 3.6 kg net per
speaker
Supplied accessories
AM loop antenna (1)
Remote (1)
Sony SUM-3 (NS) batteries (2)
FM lead antenna (1)
General
Power requirement
" 1 Power
Destination Power requirements consumption
US, Canadian model_| 120V AC, S0Hz 60W
‘Australian model 220 — 240V AC, S0Hz 120W
AEP, German, Italian, 5
East European model 220 — 230V AC, 50/60Hz 60W
UK model 240V AC, 50Hz 6ow
E, Saudi Arabia,
Hong Kong, Tourist , 110 — 120V/220V — 240V
Malaysia, Mexican, | AC, 50/60Hz Adjustable 120W
Singapore, Argentine | with the Voltage Selector
model
Dimensions — Approx. 280 x 325 x
335 mm (w/h/d)
incl. projecting parts and
controls
Mass Approx. 8 kg
Design and specifications are subject to
change without notice.
SAFETY CHECK-OUT
After correcting the original service problem,
perform the following 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
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 0.5mA (S00 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 instru-
ments.
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 volt-
meter. The “limit” indication is 0.75V, 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)
To Exposed Metal
Parts on Set
ac
0.15 uF 1.542 |_L£ | voltmeter
(0.75 V)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK /\ OR DOTTED
LINE WITH MARK A\ 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,
ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE /\,
SUR LES DIAGRAMMES SCHEMATIQUES ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA SECURITE
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIECES SONY DONT LES
NUMEROS SONT DONNES DANS CE MANUEL OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.

MODEL IDENTIFICATION TABLE OF CONTENTS
~ BACK PANEL —
Section Title Page
Specifications
(| 1
2. GENERAL
Index to Parts and Controls-+-
SERVICING NOTES
88
3. DISASSEMBLY
3-1. CD Mechanism Removal:
3-2. Front Panel Removal:
3-3. TC Mechanism Removal -
4, ADJUSTMENTS
4-1. Mechanical Adjustments -
4-2, Electrical Adjustments~
5. EXPLANATION OF IC TERMINALS ---
4-972-055-0(]: AEP (AE1) model
4-972-055-2(]: Italian model
4-972-055-3(): German model 6. DIAGRAMS
4-972-055-40: UK (UK2) model 6-1. Block Diagram — CD Section —
4-972-055-5(]: East European model 6-2, Block Diagram — Main Section —
eee oe ue east 6-3. Circuit Board Location +
4-972-055-7(): Canadian model
4-972-058-8(]: AEP (AE2) model 6-4, Printed Wiring Boards — Main Section ~
4-972-055-90): UK (UK1) model 6-5. Schematic Diagram — Main Section —
4-972-056-0(7: E, Argentine, Tourist model 6-6, Schematic Diagram — Panel Section —
4-972-056-1(]: Saudi Arabia model 6-7. Printed Wiring Boards — Panel Section
4-972-056-2(]): Australian model 6-8. Printed Wiring Boards — BD Section
4-972-056-3(]: Malaysia model
4.972.056-40]: Singapore model 6-9. Schematic Diagram — BD Section —
4-972-056-5(]:
Hong
Kong
model
6-10.
IC
Block
Diagrams
4-972-056-6[_]:
Mexican
model
7. EXPLODED VIEWS
7-1. Chassis Section--
7-2, Front Panel Section:
7-3. Mechanism Deck Section-
7-4, Mechanism Deck Section-:
7-5. Mechanism Deck Section-
7-6. CD Mechanism Section:
This appliance is classified as a 7-7, Base Unit Section:
CLASS
1
LASER
PRODUCT
CLASS
1
LASER
product.
The
CLASS
1
LASER
LUOKAN
1
LASERLAITE
i
KLASS
1
LASERAPPARAT
PRODUCT
MARKING
is
located
on
the
rear
exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
8. ELECTRICAL PARTS LIST -
This caution
CAUTION. Russe usemnananon wen Oren label is located
T"USYNUG LASERSTARUNG VED ABNING NAA i
ADVARSEL | SiocenhcoSaFanvOERE ER LOE AF FUNKTION inside the unit.
UnOGA ude AETTELSE FO}
VARO! 7 AVATTAESSA JA SUQUALUKITUS OHITETTAESSA
WARNING; USERSTRAUNG Nan DchNa DEL AR OPPNAD
OCH SPARREN AA URXOPPLAD,
| USYNUG LASERSTRALING NAA OEKSEL APnt
ADVARSEL i Uhnc EXSPONEFING POR STHALEN
CAUTION
Use of controls or adjustments or performance
of procedures other than those specified herein
may result in hazardous radiation exposure.

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 electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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 more than 25cm away form the objective lens.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
© Code number of Chuck Plate Jig : X-4918-255-1
——
ort
28S
SECTION
2
-
Thi
ti
tracted
from
GENeEnOS
patunlon
marae
gs
ET
SRS
Index
to
Parts
and
ee
Controls
Tuner/Ampiifier
Refer to the pages indicated in parentheses
for how to use the controls.
Controls with an asterisk have indicators
on themselves.
Front Panel
DISPLAY button
Preset equalizer setting buttons*
KARAOKE PON/MPX button
1] SYSTEM POWER ON/STAND BY
switch
(2)cD tray
& OPEN / CLOSE button
M (stop) button
5] Dil (play and pause) button
[6] CD operating buttons
CONTINUE button
SHUFFLE button
PROGRAM button
DBFB button
VOLUME control
CLOCK SET button
FUNCTION button
PHONES jack
MIX MIC jack
Tuner operating buttons
TUNING MODE button
MONO button
fi] ENTER/NEXT button
[f TUNER MEMORY button
[13] -144/>>4 + buttons
14 TUNER/BAND button
BeBseeseNe

Function indication
CD play mode indications
Music calendar
DBEB indication
AUTO/TUNING/PRESET/STEP
indications
Frequency /time indication
Tuner/Karaoke indications
VOLUME indication
Tape player
Cvs |coiosres
isis
Remote (RM-S22)
1
2
3
7] DOLBY NR button* 3
[2] Tape compartments
[3] Tape operating buttons 4 5 = =
& (play)
>> (fast rightward) 5
“4 (fast leftward)
WA (stop play/eject)
@ (recording)(for deck B only) ik
IN (pause) (12)
Rear panel
AEP, G, IT, BE, EXCEPT AEP, G, IT,
UK model EE, UK model
6 7] SLEEP button
[2] FUNCTION button
3] MD operating buttons
_ = > (play) button
E, EA, SP, AR, H (pause) button
— JE, HK model (stop play) button
5 a CD operating buttons
Leese — > (play) button
1 (pause) button
3] (stop play) button
H44 /P >I (AMS) buttons
Tove Cr ere mais (fast forward /fast reverse)
uttons
AEP, G, IT, EE, UK model REPEAT bullion
T] FM 75 Q terminal : EDIT button
EXCEPT AEP, G, IT,EE, UK model CHECK button
(2) + earth terminals CLEAR button
[3} AM terminal 5] Tuner operating buttons
[4] AUX IN jacks BAND button
[5] SPEAKER connectors PRESET (+/-) buttons
[6] -b ground terminal 6] SYSTEM POWER button
7) VOLTAGE SELECTOR :E, EA, SP, AR, JE, HK model 7) VOL(+/-) buttons
8] Power cord
Display window + Abbreviation
G :German
a 2) [3] 4 IT: Italian
EE : East European
port, |_| SIE EA : Saudi Arabia
St (PEI AR : Argentine
aa oat HK : Hong Kong
farsa || cok JE : Tourist
SP : Singapore
5 6 Z

SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. CD MECHANISM REMOVAL
@ Four screws (+BVTP3X8)
CD Mechanism
Wire (Flat type)(21Core)
CN102
@cnz291 (Spin)
© Loadirig panel
3-2. FRONT PANEL REMOVAL
@ Two screws (+BVTP 3X10)
© Two claws ie
@CN101 (Spin)
Front Panel Section
@ Three claws
@® €N2001 (6pin) (DECK B )
© CN604 (4pin)
® cn603 (2pin)
@ CN602 (6pin)
@ecneot (2pin)
—~Gn
I
Pei @ Wire (Flat type)(17Core)
@ Two screws (+BVTP3X8) CN105 (17pin)
6s

3-3. TC MECHANISM REMOVAL
@ Six screws (+BVTP2.6%6)
@ Eject button
TC Mechanism
@ Lid (8) assy, cassette

SECTION 4
ADJUSTMENTS
4-1, MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-
moistened swab :
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head
demagnetizer.
3, Do not use a magnetized screwdriver for the adjustments.
4, After the adjustments, apply suitable locking compound
to the parts adjusted.
5. The adjustments should be performed with the rated
4-2, ELECTRICAL ADJUSTMENTS
DECK SECTION
1, The adjustment should be performed in the publication.
(Be sure to make playback adjustment at first.)
2. The adjustment and measurement should be performed for
both L-CH and R-CH.
© Switch position
DOLBY NR switch : OFF
FUNCTION button : CD
3. Deck section electrical adjustments are made in test mode by
pressing TUNER/BAND, DISPLAY, and POPS at the same
time.
4. Input point and output level measurement point.
power supply voltage unless otherwise noted. Output level
measurement Input point
point
@ Torque Measurement 36.7mV ( ~ 25.648) AF OSC
- a are
Mode | Torque Meter Meter Reading lene ste
30 to 70gcm measurement
Forward ora (0.42 = 0.97 ozsinch) point wee peed ooclt.
R-CH
Forward 1.5 to 5.5geom
Back Tension] CQ-102C (0.021 — 0.076 ozsinch)
aes onaoe 9 1
more than 63gscm
FF, REW cO-2018 ‘oes earehy
MAIN BOARD
1 3
CNéoT
© Test Tape
Tape Contents Use
P-4-A100 10kHz, ~ 10dB Head Azimuth Adjustment
P-4-L300 315Hz, 0dB Level Adjustment
WS-48B 3kHz, Od Tape Speed Adjustment
0 dB=0.775V
DECK A
Procedure :
1. Forward Playback mode
Reverse Playback mode
test tape
P-d-A100
(fokHz, ~ 1008)
RS
Record/Playback Head Azimuth Adjustment
DECD B
‘Output level measurement point

2. Tum the adjustment screw for the maximum output levels.If
these levels do not match,turn the adjustment screw until both
of output levels match together within 1dB.
LcH
peak
output
level
RCH
peak
Screw
position
— screw angie
peak peak
3. Playback Mode
test tape
Ba.Atoo
(10K, ~ 10<8)
L-CH Oscilloscope
SS
L
nd
R ics Pee
> Te) F
RecH
Cutout fevel measurement point
(see page 8)
Scjean pater
in phase 90° 135° 1805
good wrong
4. Change the review playback mode and repeat the steps 1 to 3.
5, After the adjustment, lock the adjustment screw with suitable
locking compound,
Adjustment Location :
— record/playback head (Deck A and Deck B) —
adjustment screws
DECK Aj |DECK B
Tape Speed Adjustment
Procedure :
© Perform high speed adjustment before normal speed adjust-
ment.
Mode : Playback
fost tape
(Rie, G8)
jek
1. Set to FWD playback mode.
2. Adjust RV670 so that the frequency counter reading becomes
3,000 + 1SHz.
frequency counter
‘Output level measurement point
(see page 8)
Frequency difference between the begining and the end of the
tape should be within + 3%.
Adjustment Location : MAIN board.
(see page 10)
DECK B
DECKA
Playback Level Adjustment
Procedure :
Mode : Playback
test tape
P-4-1300
(315Hz, 008)
vive
set
“Ss
‘Output level measurement point
(See page 8)
Deck A is RV601(L-CH) and RV651(R-CH), deck B is RV602
(L-CH) and RV652 (R-CH) so that adjustment within adjustment
level as follows.
Adjustment Level :
LINE OUT level : — 7.5 + 0.5dB (0.31 to 0.35V)
Level Difference between Channels : within 0.5dB
Confirm the DOLBY OUT level does not change in playback mode
while changing the mode from playback to stop several times.
Adjustment Location : MAIN board.
(see page 10)