Sony CMT-EP414 / HCD-EP414 Service Manual ▷ View online
HCD-EP414
AEP Model
E Model
Australian Model
SERVICE MANUAL
MICRO HI-FI COMPONENT SYSTEM
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-877-473-01
2003F1678-1
© 2003.06
HCD-EP414 is the Amplifier, CD player, Tape
Deck and Tuner section in CMT-EP414.
Deck and Tuner section in CMT-EP414.
SPECIFICATIONS
Ver 1.0 2003. 06
CD player section
System
Compact disc and digital
audio system
audio system
Laser
Semiconductor laser
(
(
λ
=780 nm)
Emission duration:
continuous
continuous
Frequency response
2 Hz – 20 kHz (
±0.5 dB)
Tape deck section
Recording system
4-track 2-channel stereo
Frequency response
50 – 13,000 Hz (
±3 dB),
using Sony TYPE I
cassettes
cassettes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
87.5 – 108.0 MHz (50-kHz
step)
step)
Antenna
FM lead antenna
Antenna terminals
75 ohms balanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
European model:
European model:
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
(with the tuning interval
set at 9 kHz)
Other models:
(with the tuning interval
set at 10 kHz)
set at 10 kHz)
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
(with the tuning interval
set at 9 kHz)
Antenna
AM loop antenna, external
antenna terminal
antenna terminal
Intermediate frequency
450 kHz
Amplifier section
European model:
DIN power output (rated): 11 + 11 W
DIN power output (rated): 11 + 11 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
15 + 15 W
(6 ohms at 1 kHz, 10%
THD)
(6 ohms at 1 kHz, 10%
THD)
Music power output (reference):
25 + 25 W
Other models:
The following measured at AC 230 V or AC 120 V, 50/
60 Hz
DIN power output (rated): 11 + 11 W
The following measured at AC 230 V or AC 120 V, 50/
60 Hz
DIN power output (rated): 11 + 11 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
15 + 15 W
(6 ohms at 1 kHz, 10%
THD)
(6 ohms at 1 kHz, 10%
THD)
Inputs
MD IN (phono jacks):
MD IN (phono jacks):
Sensitivity 800 mV,
impedance 47 kilohms
impedance 47 kilohms
Outputs
PHONES (stereo minijack):
PHONES (stereo minijack):
Accepts headphones with
an impedance of 8 ohms or
more
an impedance of 8 ohms or
more
SPEAKER:
Accepts impedance of 6 to
16 ohms.
16 ohms.
— Continued on next page —
CD
Section
TAPE
Section
Model Name Using Similar Mechanism
HCD-EP515
Base Unit Name
BU-K7BD44B
Optical Pick-up Name
KSM-213EDP
Model Name Using Similar Mechanism
HCD-EP515
Tape Transport Mechanism Type
CMAL1Z240A
2
HCD-EP414
1. SERVICING NOTES
······················································· 3
2. GENERAL
·········································································· 5
3. DISASSEMBLY
3-1. Rear Cabinet ··································································· 8
3-2. CD Cabinet Section, Front Panel Section ······················· 8
3-3. Base Unit (BU-K7BD44B) ············································· 9
3-4. CONTROL Board, BACK LIGHT Board ······················ 9
3-5. Tape Mechanism Deck (CMAL1Z240A) ····················· 10
3-6. Cassette Door Assy ······················································· 10
3-7. POWER Board, MAIN Board ······································ 11
3-2. CD Cabinet Section, Front Panel Section ······················· 8
3-3. Base Unit (BU-K7BD44B) ············································· 9
3-4. CONTROL Board, BACK LIGHT Board ······················ 9
3-5. Tape Mechanism Deck (CMAL1Z240A) ····················· 10
3-6. Cassette Door Assy ······················································· 10
3-7. POWER Board, MAIN Board ······································ 11
4. MECHANICAL ADJUSTMENTS
····························· 12
5. ELECTRICAL ADJUSTMENTS
······························· 13
6. DIAGRAMS
······································································ 15
6-1. Block Diagrams – CD Section – ·································· 17
6-2. Block Diagrams – Main Section – ······························· 18
6-3. Printed Wiring Boards – CD Section – ························ 19
6-4. Schematic Diagrams – CD Section – ··························· 20
6-5. Printed Wiring Borads – Main Section – ····················· 21
6-6. Schematic Diagrams – Main Section – ························ 22
6-7. Printed Wiring Boards – Control Section – ················· 23
6-8. Schematic Diagrams – Control Section – ···················· 24
6-9. Printed Wiring Boards – Power Section – ··················· 25
6-10. Schematic Diagrams – Power Section – ···················· 25
6-11. IC Pin Function Description ······································· 28
6-2. Block Diagrams – Main Section – ······························· 18
6-3. Printed Wiring Boards – CD Section – ························ 19
6-4. Schematic Diagrams – CD Section – ··························· 20
6-5. Printed Wiring Borads – Main Section – ····················· 21
6-6. Schematic Diagrams – Main Section – ························ 22
6-7. Printed Wiring Boards – Control Section – ················· 23
6-8. Schematic Diagrams – Control Section – ···················· 24
6-9. Printed Wiring Boards – Power Section – ··················· 25
6-10. Schematic Diagrams – Power Section – ···················· 25
6-11. IC Pin Function Description ······································· 28
7. EXPLODED VIEWS
7-1. Cabinet Section ····························································· 30
7-2. Front Panel Section ······················································· 31
7-3. CD Cabinet Section ······················································ 32
7-4. Base Unit Section (BU-K7BD44B) ······························ 33
7-2. Front Panel Section ······················································· 31
7-3. CD Cabinet Section ······················································ 32
7-4. Base Unit Section (BU-K7BD44B) ······························ 33
8. ELECTRICAL PARTS LIST
······································· 34
TABLE OF CONTENTS
General
Power requirements
European model:
European model:
230 V AC, 50/60 Hz
Australian model:
Mexican model:
Mexican model:
230 - 240V AC, 50/60Hz
120 V AC, 60Hz
110 - 120V or 220 - 240V AC, 50/60Hz
120 V AC, 60Hz
110 - 120V or 220 - 240V AC, 50/60Hz
Other models:
Power consumption
European model:
Power consumption
European model:
50 watts
0.3 watts (in the standby
mode)
0.3 watts (in the standby
mode)
Other models:
50 watts
Dimensions (w/h/d)
Approx. 163
× 233 × 237
mm
Mass
Approx. 3.6 kg
Design and specifications are subject to change
without notice.
without notice.
3
HCD-EP414
SECTION 1
SERVICING NOTES
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
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 exterior.
The CLASS 1 LASER PRODUCT MARKING is located on
the exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
exceeding the limit for Class 1.
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.
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.
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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.
that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• 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 during
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-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
0
OR DOTTED LINE WITH
MARK
0
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.
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
4
HCD-EP414
Service Position of the CD Mechanism Deck
Service Position of the Tape Cassette Mechanism Deck
CD BOARD
POEWER BOARD
MAIN BOARD
FRONT PANEL
MAIN BOARD
POWER BOARD
