Sony HCD-GX25 / HCD-RG220 / MHC-GX25 / MHC-RG220 Service Manual ▷ View online
29
29
HCD-GX25/RG220
5-4. BLOCK DIAGRAM — AMP/POWER SUPPLY SECTION —
JK002
R-CH
PHONES
+
–
–
–
+
R
L
SPEAKER
JK502
R-CH
R-CH
–VL
–VP
+VP
–VH
OVER LOAD
DETECT
Q505
OUTPUT LEVEL
DETECT
Q23, 24
Q23, 24
BIAS
Q507, 509
HOLD
Q7 – 9
DC DETECT
Q5,6
THERMAL DETECT
Q10, 11
+
FINAL DRIVE
Q501, 503
SWITCHING
Q17, 19, 22
SWITCHING
Q18
R-CH
R-CH
+
+
+
TH501,
502
+
R-CH
R-CH
CASCADE
Q511, 513, 515
PRE DRIVE
Q517, 519
MUTING
Q525
+
CURRENT
MIRROR
Q521, 523
R-CH
+
+VL
+VH
OUTPUT LEVEL
DETECT
Q20, 21
Q20, 21
R-CH
+
MUTE
Q321
INPUT SELECT SWITCH, TONE CONTROL,
ELECTRICAL VOLUME, BASS BOOST AMP
IC301
BASS BOOST CONTROLLER
IC310
19
SAOUT
VACS/STR
29
TOUT2
25
OUT2
24
SWOUT
3
DATA
4
CLOCK
LCK
S-MUTE
O-POWER
HOLD
CLK
SO
5
LCK
40 CD-L
39 TUNER-L
38 TAPE-L
28 VOLIN2
–30V
REGULATOR
Q534 – 536
(AC IN)
SUB POWER
TRANSFORMER
T902
MAIN POWER
TRANSFORMER
T901
RECT
D2
+VL
TO
POWER AMP
BLOCK
–VL
VL
VL
VF1
TO
FLUORESCENT
INDICATOR TUBE
VF2
RECT
D3-6
+VH
–VH
–VFL
EVER+10V
VH
VH
RECT
D902 – 905
+4V
REGULATOR
IC602
+3.3V (SUB)
DI
SO
CLK
MCLK
LCK
MECHA VCC
SOL-A
SOL-B
SOL-B
RESET
POWER DOWN
D617
RESET SIGNAL
GENERATOR
IC603
CD-L
A
TUNER-L
TAPE-L
REC-L
J
G
K
C
21
DATA
22
CLOCK
35 RECB-2
36 GAME-L
S-MUTE, O-POWER, HOLD
B
: MIC INPUT
9
MOTOR VCC
10
SOL-A
11
SOL-B
MECHA VCC
SOL-A
SOL-B
H
HP
F
RY902
RY901
VOLTAGE
SELECTOR
S901
RESET SWITCH
Q601
R-CH
FRONT SPEAKER
ON/OFF RELAY DRIVE
Q304
MUTING CONTROL
SWITCH
Q527
POWER OFF
MUTING DRIVER
Q529, 530
D513
VM+10V
FAN MOTOR
ON/OFF SWITCH
Q371,373
RY501
M731
(FAN)
(FAN)
M
SP-F
S-MUTE
O-POWER
HOLD
O-POWER
HOLD
: TAPE PLAY
: REC
: CD PLAY
: TUNER (FM/AM)
SIGNAL PATH
: MD (VIDEO) IN
R-ch is omitted due to same as L-ch.
R-CH
JK001
JK004
(RG220:AEP,UK,RU)
(RG220:AEP,UK,RU)
L
R
VIDEO
AUDIO
VIDEO
OUT
GAME
INPUT
BUFFER
IC304
CENTER VOLATAGE
GENERATOR
Q324
VM+10V
TUNER/TAPE/PANEL
SECTION
TUNER/TAPE/PANEL
SECTION
TUNER/TAPE/PANEL
SECTION
CD
SECTION
TUNER/TAPE/PANEL
SECTION
TUNER/TAPE/PANEL
SECTION
CD
SECTION
MCLK
DI
+4V
HOLD
Q12
OVER CURRENT
DETECT
Q13
O-POWER
VM+9V
VM+10V
RECT
D319 – 322
RECT
D301 – 304
DC DET
Q329
VM
VM
VCC
DECK+9V, M+9V
+10V
REGULATOR
IC313
+9V
REGULATOR
IC308
D102
P+7V
D313 – 315
+9V
REGULATOR
IC305
+4V
REGULATOR
IC306
B+ SWITCH
Q301, 302
RELAY B+
+9V
+1.8V
(MP3)
+3.3V (MAIN)
+1.8V
REGULATOR
IC803
POWER ON/OFF
RELAY DRIVE
Q330, 331
TUNER/
TAPE/
PANEL
SECTION
CD
SECTION
E
VACS/STR
(GX25,RG220:EXCEPT EA)
(RG220:EA)
(GX25,RG220:AEP,UK,RU)
(RG220:EXCEPT AEP,UK,RU)
• Abbreviation
RU : Russian model
RU : Russian model
(Page 28)
(Page 27)
(Page 28)
(Page 28)
(Page 27)
(Page 28)
(Page 28)
(Page 28)
(Page 27)
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30
HCD-GX25/RG220
5-7. CIRCUIT BOARDS LOCATION
5-5. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
5-6. WAVEFORMS
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side)
the parts face are indicated.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
B
These are omitted.
C
E
Q
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
2
: nonflammable resistor.
•
C
: panel designation.
•
Indication of transistor.
•
A
: B+ Line.
•
B
: B– Line.
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : CD PLAY
[
] : TAPE PLAY (DECK-A)
{
} : TAPE PLAY (DECK-B)
〈〈
〉〉
: REC
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: TUNER (FM/AM)
J
: CD PLAY
E
: TAPE PLAY (DECK-A)
d
: TAPE PLAY (DECK-B)
G
: REC
j
: MD (VIDEO) IN
N
: MIC INPUT
• Abbreviation
CND : Canadian model
AUS
AUS
: Australian model
RU
: Russian model
EA
: Saudi Arabia model
MX
: Mexican model
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher than
• Unleaded solder melts at a temperature about 40 °C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to about
350 °C.
Caution: The printed pattern (copper foil) may peel away if the
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to about
350 °C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may also
be added to ordinary solder.
be added to ordinary solder.
MAIN board
DRIVER board
SW board
MOTOR (LD) board
MOTOR (TB) board
VIDEO OUT board
BD board
SENSOR board
TRANS board
AMP board
H/P JACK board
GAME JACK board
PANEL board
REMOTE board
1 STREAM LED board
Note:
The components iden-
tified by mark
The components iden-
tified by mark
0
or dot-
ted line with mark
0
are critical for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés
par une marque
Les composants identifiés
par une marque
0
sont cri-
tiques pour la sécurité.
Ne les remplacer que par
une piéce portant le numéro
spécifié.
Ne les remplacer que par
une piéce portant le numéro
spécifié.
– PANEL Board –
1
2
8.64MHz
IC601
qg
(CF1)
32.768kHz
IC601
qs
(XT1)
1.2Vp-p
1Vp-p
– MAIN Board –
(REC mode)
(REC mode)
qa
1.7Vp-p
qs
15.8Vp-p
Q223 (Base)
Q223 (Collector)
11.3µs
11.3µs
– BD Board –
(CD PLAY mode)
(CD PLAY mode)
1
2
IC721
4
(RF)
1.3Vp-p
3
4
IC721
qd
(FE)
Approx.
180
180
mVp-p
IC721
qg
(TE)
Approx.
150mVp-p
150mVp-p
4Vp-p
16.9344MHz
IC721
rk
(XOUT)
31
31
HCD-GX25/RG220
5-8. PRINTED WIRING BOARD — CD MECHANISM SECTION (1/2) (HCD-GX25/RG220: EXCEPT AEP, UK, RUSSIA MODEL) — • Refer to page 30 for Circuit Boards Location.
: Uses unleaded solder.
(Page 40)
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
M702
(SPINDLE)
GX25,RG220:
EXCEPT AEP,UK,RU
EXCEPT AEP,UK,RU
1-688-816-
(14)
14
16
15
2
1
M
M701
(SLED)
S701
(LIMIT)
M
1
19
2
18
OPTICAL
PICK-IP
BLOCK
A1
MAIN
BOARD
CN312
CN710
CN708
X701
(KSS-213D)
Ref. No.
Location
IC721
H-5
IC722
D-5
Q701
E-2
• Semiconductor
Location
32
32
HCD-GX25/RG220
5-9. PRINTED WIRING BOARD — CD MECHANISM SECTION (1/2) (HCD-RG220: AEP, UK, RUSSIA MODEL) — • Refer to page 30 for Circuit Boards Location.
: Uses unleaded solder.
(Page 40)
C860
R860
C817
FB803
FB805
FB804
FB806
R806
R807
R807
R747 R746
3
4
5
IC801
IC802
BD BOARD
(SIDE A)
1-688-077-
(11)
11
OPTICAL
PICK-UP
BLOCK
(KSS-213D)
IC722
IC803
IC721
BD BOARD
(SIDE B)
1-688-077-
(11)
11
M702
(SPINDLE)
M
+
–
M701
(SLED)
M
+
–
S701
(LIMIT IN)
TP
(RF)
TP
(FE)
TP
(TE)
TP
(VC)
E
B
C
MAIN
BOARD
CN312
A2
7
1
14
8
22
28
15
21
1
A
B
C
D
E
F
2
3
4
5
6
7
8
9
10
11
Ref. No.
Location
IC721
E-8
IC722
C-9
IC801
E-3
IC802
F-3
IC803
F-9
Q701
B-7
• Semiconductor
Location
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