Sony HCD-EC50 Service Manual

1818
HCD-EC50
HCD-EC50
6-1. BLOCK DIAGRAM — BD/DRIVER SECTION —
Q669,670
Q671,672
Q665,666
Q667,668
A
MAIN
SECTION
(Page 20)
M1
+
-
+
-
M
SCOR
P67/AN7/INT2
XLAT-MP3
P35/IC1
IREQ-MP3
P74/SDA/SC2
DATA-MP3
P30/SO3
CLK-MP3
P31/SC3
ACK-MP3
P75/SCL/SO2
REQ-MP3
P37/OCU1
M-MUTE
P41/LED1
P43/LED3
P45/LED5/TOT0
P44/LED4
P47/LED7/TOT2
P46/LED6/TOT1
P51/TIN1
P52/TIN2/PPGO
P53/PPG1
P42/LED2
P50/TINO
P36/OCU0
P54/SI0
P55/SC0
P33/TMCK
P56/SO0
P26
P76
SENS
CLOCK
XLAT
DATA
XRST
XTACN
SW3
SW1
SW7(CHACK)
SW8(OPEN)
SW2
SW6(CLOSE)
SW5(STOC)
OPTICAL PICK-UP
BLOCK
(KSM-213DCP/C2NP)
AUTOMATIC
POWER
CONTROL
Q321
+1.7V
+3.3V
LD
GND
FOCUS
COIL
F+
F
T+
T
SP+
SP
SL+
SL
TRACKING
COIL
IC402
S201
(LIMIT)
X201
16.9344MHz
+3.3V
SL/SP MOTOR
DRIVER
MOTOR
DRIVE
IC201
RF AMP,DSP,MP3
12
6
11
13
14
VR
PD
16
15
18
17
4
23
2
20
MUTE
CH2OUTF
CH1FIN
CH1RIN
CH2FIN
CH3FIN
OPIN+
CH2OUTR
CH1OUTR
CH1OUTF
CH4OUTF
CH4OUTR
CH3OUTR
CH3OUTF
M
M
M401
(SPINDLE)
M402
(SLED)
VCC
VC
A
B
C
D
E
F
DETECTOR
A
B
E
50
F
51
LD
66
PD
67
TFDR
43
SSTP
39
FFDR
45
SFDR
41
MPD
M-MUTE
38
XTACN
XRST
DATA
XLAT
CLOCK
117
AOUT2
112
AOUT1
108
XTAO
109
XTAI
57
58
C
59
D
60
SENS
XTACN
XRST
DATA
XLAT
CLOCK
SENS
13
XLAT-MP3
REQ-MP3
REQ-MP3
CD-L
CD-R
XLAT-MP3
TRDR
44
22
CH3RIN
SRDR
42
CH2RIN
FRDR
46
5
3.3V+1.8V
IC202
CD MECHANISM DECK
BLOCK
SYSTEM CONTROLLER
IC701
(1/2)
7
3 1
ACK-MP3
ACK-MP3
12
15
7
89
16
11
20
26
8
DATA2
DATA-MP3
90
CLK2
CLK-MP3
10
IREQ-MP3
IREQ-MP3
SCOR
SCOR
+1.8
REG
43
10
49
5
6
50
12
11
28
27
22
26
20
25
19
18
29
30
8
31
3
34
21
14
FOCUS/TRUCKING
COIL DRIVER
MOTOR
DRIVE
M2
M
MOTOR
DRIVE
24
23
MOTOR
DRIVE
Q661-664
VM9V
CD
MOTOR
CONTROL
: CD
• Signal Path

Sony HCD-EC50 Specifications

General

Type	Mini Hi-Fi System
Cassette Deck	Yes
RMS Output Power	50W
Tuner Bands	FM, AM
Audio Output	Stereo
CD Player	Yes
Radio	Yes
USB Port	Yes
MP3 Playback	Yes
Remote Control	Yes
Functions	CD, Radio

Summary

SECTION 1 SERVICING NOTES

SAFETY CHECK-OUT

Procedure for performing safety checks, including AC leakage testing.

LEAKAGE TEST

Detailed method for testing AC leakage current from exposed metal parts.

Other Operations

Creating your own CD program (Program Play)

Instructions for creating custom playback sequences for CD tracks or MP3 files.

Presetting radio stations

Steps to store and recall favorite radio stations using preset tuning.

Recording onto a tape

How to record audio from various sources onto a cassette tape.

SECTION 3 DISASSEMBLY

3-1. DISASSEMBLY FLOW

Diagram illustrating the sequence of disassembly steps for the set.

SECTION 4 MECHANICAL ADJUSTMENTS

• Torque Measurement

SECTION 5 ELECTRICAL ADJUSTMENTS

RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT

Procedure for adjusting the record/playback head azimuth for optimal signal output.

FOCUS BIAS CHECK

Procedure for checking focus bias using an oscilloscope and specific waveform.

Procedure for checking focus bias using an oscilloscope and specific waveform.

TUNER SECTION

AM FREQUENCY COVERAGE ADJUSTMENT

FM FREQUENCY COVERAGE ADJUSTMENT

[FM DETECTOR ADJUSTMENT]

SECTION 6 DIAGRAMS

6-1. BLOCK DIAGRAM BD/DRIVER SECTION

6-2. BLOCK DIAGRAM - TUNER SECTION -

6-3. BLOCK DIAGRAM MAIN SECTION -

6-4. PRINTED WIRING BOARD BD SECTION

6-5. SCHEMATIC DIAGRAM BD SECTION

6-6. PRINTED WIRING BOARD MAIN SECTION -

6-7. SCHEMATIC DIAGRAM MAIN SECTION (1/3)

6-8. SCHEMATIC DIAGRAM MAIN SECTION (2/3)

6-9. SCHEMATIC DIAGRAM MAIN SECTION (3/3)

6-10. PRINTED WIRING BOARD PANEL SECTION

6-11. SCHEMATIC DIAGRAM PANEL SECTION

6-12. PRINTED WIRING BOARD AMP SECTION

6-13. SCHEMATIC DIAGRAM AMP SECTION

6-14. PRINTED WIRING BOARD POWER SECTION

6-15. SCHEMATIC DIAGRAM POWER SECTION

SECTION 7 EXPLODED VIEWS

7-1. OVERALL SECTION

SECTION 8 ELECTRICAL PARTS LIST AMP