Sony HCD-EP505 User manual

SERVICE MANUAL
COMPACT DISC DECK RECEIVER
US Model
Canadian Model
AEP Model
UK Model
E Model
Chinese Model
HCD-EP505
Ver 1.2 2003.10
HCD-EP505 is the amplifier, CD
player, tape deck and tuner section
in CMT-EP505.
SPECIFICATIONS
CD Model Name Using Similar Mechanism HCD-EP50
Section CD Mechanism Type CS-21SC-1280
TAPE Model Name Using Similar Mechanism HCD-EP50
Section Tape Transport Mechanism Type CRL3439
9-873-673-03 Sony Corporation
2003J05-1 Home Audio Company
C2003.10 Published by Sony Engineering Corporation
AUDIO POWER SPECIFICATIONS:
(US model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 8 Ωloads both channels driven, from 120 -
10,000 Hz; rates 14 W per channel minimum RMS
power, with no more than 10% total harmonic
distortion from 250 mW to rated output.
Amplifier section
Canadian model:
Continuous RMS power output (reference)
14 + 14 W
(8 Ωat 1 kHz, 10% THD)
European model:
DIN power output (rated) 11 + 11 W
(8 Ωat 1 kHz, DIN)
Continuous RMS power output (reference)
14 + 14 W
(8 Ωat 1 kHz, 10% THD)
Music power output (reference)
27 + 27 W
Other models:
The following measured at AC 230 V orAC 120V,
50/60 Hz
DIN power output (rated) 11 + 11 W
(8 Ωat 1 kHz, DIN)
Continuous RMS power output (reference)
14 + 14 W
(8 Ωat 1 kHz, 10% THD)
Outputs
PHONES: Accepts headphones of 8 Ωor
(stereo mini jack) more
SPEAKER: Accepts impedance of 8 to
16 Ω
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ=780 nm)
Emission duration:
continuous
Frequency response 20 Hz - 20 kHz (±0.5 dB)
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 50 - 13 000 Hz (±3 dB),
using Sony TYPE I 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 MHz
Antenna FM lead antenna
Antenna terminal 75 coaxial
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Pan-American model: 530 - 1 710 kHz
(with the interval set at 10 kHz)
531 - 1 710 kHz
(with the interval set at 9 kHz)
European 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 Supplied AM loop antenna
Intermediate frequency 450 kHz
General
Power requirements
North American model: 120 V AC, 60 Hz
European model: 230 V AC, 50/60 Hz
Argentine model: 220 - 230 V AC, 50/60 Hz
Hong Kong model: 230 V AC, 50/60 Hz
Other models: 230 V AC, 50/60 Hz
Power consumption
US model: 35 W
Canadian model: 35 W
European models: 40 W
0.5 W (in the standby mode)
Other models: 40 W
Dimensions (w/h/d) Approx. 145 ×240×252 mm
Mass Approx. 3.5 kg
Supplied accessories: AM loop antenna (1)
Remote Commander (1)
Batteries (2)
FM lead antenna (1)
Design and specifications are subject to change
without notice.

2
HCD-EP505
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.
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
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 0.5 mA (500 microamperes.).
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-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 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 2VAC range are suit-
able. (See Fig. A)
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.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the bottom.
Ver 1.1
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µFAC
voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

3
HCD-EP505
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Front Panel Section ......................................................... 8
3-3. MAIN Board ................................................................... 8
3-4. CD Cabinet Section......................................................... 9
3-5. CD Mechanism Deck (CS-21SC-1280) ......................... 9
3-6. Tape Mechanism Deck (CRL3439) ................................ 10
3-7. Cassette Lid ..................................................................... 10
4. MECHANICAL ADJUSTMENTS....................... 11
5. ELECTRICAL ADJUSTMENTS......................... 11
6. DIAGRAMS
6-1. Block Diagram – TUNER Section – ............................. 15
6-2. Block Diagram – TAPE DECK Section – ..................... 16
6-3. Block Diagram – MAIN Section – ................................ 17
6-4. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 18
6-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 19
6-6. Printed Wiring Boards
– MAIN Section (AEP, UK, Chinese models) – ............ 20
6-7. Schematic Diagram
– MAIN Section (AEP, UK, Chinese models) (1/3) – ... 21
6-8. Schematic Diagram
– MAIN Section (AEP, UK, Chinese models) (2/3) – ... 22
6-9. Schematic Diagram
– MAIN Section (AEP, UK, Chinese models) (3/3) – ... 23
6-10. Printed Wiring Boards – MAIN Section
(Except AEP, UK, Chinese models) – ............................ 24
6-11. Schematic Diagram – MAIN Section
(Except AEP, UK, Chinese models) (1/3) – ................... 25
6-12. Schematic Diagram – MAIN Section
(Except AEP, UK, Chinese models) (2/3) – ................... 26
6-13. Schematic Diagram – MAIN Section
(Except AEP, UK, Chinese models) (3/3) – ................... 27
6-14. Printed Wiring Board – DISPLAY Section – ................ 28
6-15. Schematic Diagram – DISPLAY Section – ................... 29
6-16. Printed Wiring Board – POWER Section –................... 30
6-17. Schematic Diagram – POWER Section – ..................... 31
6-18. IC Pin Function Description ........................................... 34
7. EXPLODED VIEWS
7-1. Cabinet Section ............................................................... 36
7-2. Front Panel Section-1...................................................... 37
7-3. Front Panel Section-2...................................................... 38
7-4. CD Cabinet Section......................................................... 39
8. ELECTRICAL PARTS LIST ............................... 40
Ver 1.1

4
HCD-EP505
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
1. Press the I/1button to the power ON with no disc inserted
and press the [CD] button.
2. Open the lid for CD.
3. Turn on SW300 as following figure.
4. Confirm the laser diode emission while observing the object-
ing lens. When there is no emission, Auto Power Control cir-
cuit or Optical Pick-up is broken.
Objective lens moves up and down five times for the focus
search.
SECTION 1
SERVICING NOTES
SW300
Ver 1.1
•MODEL IDENTIFICATION
– Bottom View –
Power Voltage Indication
Power Voltage
Indication
AC: 120 V 60 Hz 35 W
AC: 220 – 230V -50/60 Hz 40 W
AC: 230 V -50/60 Hz 40 W
Model
US and Canadian
models
Argentina model
Other models

5
HCD-EP505
Main unit
P– Z
PHONES jack qk
PLAY MODE qj
PRESET +/– qd
RDS (European model only)/DIR qj
Remote sensor 0
TAPE 3
TIMER indicator 1
TUNER 6
TUNER MEM qh
TUNING +/– qa
VOLUME control qs
ALPHABETICAL ORDER
A – M
Cassette compartment qg
CD 4
DIR qj
DISPLAY 2
Display Window 5
ENTER qh
MEGA BASS 8
MUSIC MENU 9
BUTTON DESCRIPTIONS
@/1 (power) wd
CD
.m(go back) qa
M>(go forward) qa
nN(play) w;
X(pause) ws
ZPUSH OPEN/CLOSE 7
x(stop) ql
TAPE
M> (fast forward) qa
X(pause) ws
nN (play) w;
z (recording) wa
.m (rewind) qa
ZPUSH OPEN/CLOSE qf
x(stop) ql
SECTION 2
GENERAL This section is extracted from
instruction manual.
LOCATION OF CONTROLS
– Front Panel –
Ver 1.1

6
HCD-EP505
ALPHABETICAL ORDER
A – M
CD wf
CLOCK/TIMER +/– w;
CLOCK/TIMER ON/OFF 2
CLOCK/TIMER SET 3
DISPLAY qa
ENTER qf
MEGA BASS qd
MUSIC MENU +/– qh
MUTING qg
P – Z
PLAY MODE/RDS
(European model only)/DIR 7
PRESET +/– 9
REPEAT 8
SLEEP 1
TAPE wd
TUNER/BAND 5
TUNER MEMORY qj
TUNING + q;
TUNING – qk
VOL (volume) +/– qs
Remote control
BUTTON DESCRIPTIONS
m(rewind) M
(fast forward) ql
.(go back) >
(go forward) w;
X(pause) ws
nN (play) wa
`/1(power) 4
x(stop) 6
tape function.
Ver 1.1
Setting the clock
1 Turn on the system.
2 Press CLOCK/TIMER SET on the
remote.
3 Press .or >on the remote
repeatedly to set the hour.
4 Press ENTER.
5
Press .or >on the remote
repeatedly to set the minute.
6 Press ENTER.
The clock starts working.
To adjust the clock
1Press CLOCK/TIMER SET on the remote.
2Press .or >on the remote to select
“SET CLK”, then press ENTER.
3Do the same procedures as step 3 to 6 above.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.

HCD-EP505
7
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-4. CD CABINET SECTION
(Page 9)
3-2. FRONT PANEL SECTION
(Page 8)
3-6. TAPE MECHANISM DECK
(CRL3439)
(Page 10)
3-5. CD MECHANISM DECK
(CS-21SC-1280)
(Page 9)
3-7. CASSETTE LID
(Page 10)
3-3. MAIN BOARD
(Page 8)
SET

HCD-EP505
8
3-3. MAIN BOARD
Note: Follow the disassembly procedure in the numerical order given.
3-2. FRONT PANEL SECTION
6 connector
(CN505)
3 two screws
(K3
× 5)
1 two screws
(BTP2.6
× 10)
2 two screws
(BVTP3
× 10
)
3 two screws
(K3
× 5)
3 two screws
(K3
× 5)
7 connector
(SW300)
8 front panel section
5
4 claw
6 connector
(CN302)
5 connector
(CN303)
4 connector
(CN307)
3 connecto
r
(CN7)
1 connector
(CN601)
2 connector
(CN305)
9 main board
7 screw
(BTP2.6
× 8)
8

HCD-EP505
9
3-4. CD CABINET SECTION
3-5. CD MECHANISM DECK (CS-21SC-1280)
1 two screws
(BTP2.6
× 8
)
2 CD cabinet section
1 two screws
(BVTP3
× 10)
2 CD cover housing
7 vibration proof rubber
(pink)
7 vibration proof rubber
(pink)
4 four fiber washers
3 four pulley screws
7 vibration proof rubber
(ORG)
7 vibration proof rubber
(ORG)
8 CD mechanism deck (CS-21SC-1280)
5
6
two spring clamps
6 two spring clamps

HCD-EP505
10
3-6. TAPE MECHANISM DECK (CRL3439)
3-7. CASSETTE LID
1 two screws
(BVTP3 × 10)
1 two screws
(BVTP3 × 10
)
2 tape mechanism deck
(CRL3439)
1 Open the cassette lid.
3 cassette lid
2 claw
2 claw