Sony CMT-EP505 / HCD-EP505 Service Manual ▷ View online
HCD-EP505
30
30
6-16. PRINTED WIRING BOARD – POWER Section –
(AEP, UK, CH)
EXCEPT
AEP, UK, CH
J
MAIN
BOARD
R225
+
+
+
+
+
POWER BOARD
+
E C B
E C B
POWER
TRANSFORMER
(SUB)
AC IN
T201
POWER
TRANSFORMER
(MAIN)
4
3
2
2
1
1
2
3
4
A
B
C
D
1
2
3
4
5
1
7
E
MAIN
BOARD
(US, CND, MX)
(US, CND, MX)
(EXCEPT US, CND, MX)
(US, CND, MX)
• Semiconductor
Location
Ref. No.
Location
D201
B-5
D202
A-5
D203
B-5
D204
B-5
D205
C-5
D206
C-5
D207
C-5
D208
C-5
D212
A-3
D213
A-3
D215
A-3
D216
B-3
D217
A-3
D218
B-3
D221
B-3
Q205
C-3
Q206
C-3
Z201
C-4
(Page 20)
Ver 1.1
(Page 24)
HCD-EP505
31
31
6-17. SCHEMATIC DIAGRAM – POWER Section –
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
no mark : TUNER
E
MAIN BOARD
J
MAIN BOARD
0.7
6.1
0.1
5.3
6
CN505
7P
25V
50V
10:EXCEPT US, CND, MX
39:US, CND, MX
39:US, CND, MX
(US, CND, MX)
(EXCEPT US, CND, MX)
(US, CND, MX)
R225
3.3M
1/2W
3.3M
1/2W
POWER
TRANSFORMER
(SUB)
POWER
TRANSFORMER
(MAIN)
250V
4
3
2
1
400µH
AC IN
POWER BOARD
EXCEPT
AEP, UK, CH
( AEP, UK, CH)
(Page 23)
Ver 1.1
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0
sont
critiques pour la sécurité.
Ne les remplacer que
par une pièce portant le numéro spécifié.
(Page 27)
HCD-EP505
32
32
• IC Block Diagrams
– MAIN Board –
U401
LA1823 (EXCEPT AEP, UK, CH models)
U403
LC72131M-TL-M (AEP, UK, CH models)
Ver 1.1
U402
LA1837L (AEP, UK, CH models)
24
23
FM
RF
1
AM
RF
GND2
2
VCC2
REG
3
AM
MIX
AM
OSC
OSC
BUFFER
4
22
21
VCC1
20
FM
OSC
PHASE
COMP
FM
MIX
DECODER
5
6
19
GND1
7
MUTE
8
18
17
16
9
15
PILOT
DET
14
FM
DET
13
10
FM
S-METER
11
12
ST
ST SW
FF
VCO
FF
FF
TRIG
AM
IF
AM
DET
AGC
FM
IF
SD
IF
BUFFER
FMRF IN
RF GND
FMRF OUT
VCC2
FM OSC
DET OUT
MUTE
R
L
AM/FM
MO/ST
FM DET
AMRF IN
REG
AM OSC
VCC1
FM MIX
GND
FM BUFFER
AM OSC BUFFER
AM MIX
QUAD
AMIF
SD
ALC
BUFF
AM
OSC
AM
MIX
AM
RF. AMP
AGC
IF
DET
S-CURVE
AM/FM
IF-
BUFF
REG
TUNING
DRIVE
GND
VCC
PILOT
DET
VCO
FF
STEREO
DRIVE
STEREO
SW
MUTE
FF
FF
FM
IF
FM
DET
DECODER
ANT 1-BIRDIE
1
2 3
4
5
6
7
9
8
20
19
18
17 16
15
14
11
10
21
22
23
24
25
27
26
29
30
OSC.BUFF
FM-SD.ADJ
AM-OSC
REG
FM-AFC
AM-RF-IN
AGC
MPX-IN
FM-DET OUT
AM-DET OUT
OUT L
OUT R
AMP-IN L
AMP-IN R
AMP OUT R
AMP OUT L
VCO-STOP
STEREO
AM/FM
AM. SD
FM. SD
AM. SD ADJ
IF-BUFF
MUTE
VCC
FM DET
FM-IN
AM-MIX
FM-IF
AM-IF
GND
TUNED
S-METER
FM
S-METER
AM
COMP
SD
AM
12
13
PHASE
DET
28
PHASE
DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS
PROGRAMMABLE
DRIVER
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
POWER
ON
RESET
1/2
CCB
INTERFACE
1
2 3 4 5
6 7 8 9
16
15
14
13
12
11
10
17
18
19
20
XOUT
VSS
AOUT
AIN
PD
VDD
FMIN
AMIN
XIN
DO
CL
DI
CE
IFIN
IO1
BO4
BO3
BO2
BO1
IO2
UNLOCK
DETECTOR
DATA SHIFT REGISTER LATCH
U402
LC72131 (EXCEPT AEP, UK, CH models)
U501
LC75392
PHASE
DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS
PROGRAMMABLE
DRIVER
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
POWER
ON
RESET
1/2
CCB
INTERFACE
1
3 4 5 6
7 8 9 10
18
17
16
15
13
12
11
19
20
21
22
XOUT
VSS
AOUT
AIN
PD
VDD
FMIN
AMIN
14
NC
XIN
DO
CL
DI
CE
2
NC
IFIN
IO1
BO4
BO3
BO2
BO1
IO2
UNLOCK
DETECTOR
DATA SHIFT REGISTER LATCH
+
–
3
6
9
12
15
2
5
8
11
14
1
4
7
10
13
28
25
22
19
16
29
26
23
20
17
30
27
24
21
18
+
–
+
–
–
+
–
–
LATCH
DECODER
CONTROL
SHIFT
REGISTER
–
+
LVROUT
LVRIN
LTOUT
LTCOM
LT4
LT3
LT2
LT1
L4
L3
L2
L1
VDD
CL
DI
RVROUT
RVRIN
RTOUT
RTCOM
RT4
RT3
RT2
RT1
R4
R3
R2
R1
VREF
VSS
CE
U601
µ
PC1330HA
1
2
3
4
5
6
7
8
9
INVERTER
COMPARATER
SW R1
GND
SW P1 CONT
GND
VCC
SW P2 GND
SW R2
33
HCD-EP505
U603
BA335
– DISPLAY Board –
IC305
BU1924F-E2 (AEP, UK models)
U602
AN7312
RIPPLE FILTER
ALC
14
13
12
1
2
3
11
10
9
AMP. CH2
AMP. CH1
8
4
5
6
7
VCC
RF
ALC IN2
OUT2
PC2
NF2
IN2
GND
ALC CONST
ALC IN1
OUT1
PC1
NF1
IN1
AF AMP
COMPARATOR
1
2
3
4
5
6
7
8
9
V. N
C. R.
NF
NC
GND
TROUT
DIOUT
V8
VCC
ANALOG
DIGIT
AL
RCLK
NC
XO
XI
VSS2
T2
VDD2
T1
QUAL
RDA
T
VREF
MUX
VDD1
VSS1
VSS3
CMP
1
4
3
6
5
8
7
2
14
15
16
13
12 11 10
9
CLOCK
PLL 57kHz
RDS/ARI
COMPARATOR
8th SWITCHED
CAPACITOR
FILTER
ANTI-ALIASING
FILTER
BIPHASE
DECODER
PLL
1187.5Hz
DEFFERENTIAL
DECODER
TEST
Ver 1.1
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