Sony XM-ZR4A Service Manual ▷ View online
XM-ZR4A
9
2-4. MAIN BOARD
front panel
MAIN board
three screws
(+P, TT, B-TYPE, 3XL)
(+P, TT, B-TYPE, 3XL)
two screws
(+P, TT, B-TYPE, 3XL)
(+P, TT, B-TYPE, 3XL)
XM-ZR4A
10
SECTION 3
DIAGRAMS
•
A : B+ Line.
•
B : B– Line.
•
H : adjustment for repair.
• Power voltage is dc 14.4V and fed with regulated dc
power supply from +12V and REM terminals.
• Voltages is dc with respect to ground under no-signal
conditions.
no mark : POWER ON
power supply from +12V and REM terminals.
• Voltages is dc with respect to ground under no-signal
conditions.
no mark : POWER ON
*
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10M
Ω) .
Voltage variations may be noted due to normal production
tolerances
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
• Circled number refer to waveforms.
• Signal path.
F :
AUDIO
for printed wiring boards:
•
X : Parts extracted from the component side.
•
: Pattern from the side which enables seeing.
THIS NOTE IS COMMON FOR PRINTED WIR-
ING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
ING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
for schematic diagrams:
• All capacitors are in
μF unless otherwise noted. (p: pF)
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
specifi ed.
•
Note for Replacement of the Transistors
The transistors Q110, 111, 210, 211, 310, 311, 316, 317, 410, 411,
416 and 417 have two different ranks: P rank and Y rank.
The rank of these transistors need to be selected properly
according to each channel. When replacing any one of these
transistors, check its rank and replace with the appropriate
transistor of the same rank.
416 and 417 have two different ranks: P rank and Y rank.
The rank of these transistors need to be selected properly
according to each channel. When replacing any one of these
transistors, check its rank and replace with the appropriate
transistor of the same rank.
Rank
Q110, 210, 310,
316, 410, 416
Q111, 211, 311,
317, 411, 417
P
2SC5100-P
(8-729-024-79)
2SA1908-P
(8-872-024-76)
Y
2SC5100-Y
(8-729-024-80)
2SA1908-Y
(8-872-024-77)
A1908: 2SA1908
C5100: 2SC5100
C5100: 2SC5100
P: RANK P
Y: RANK Y
Y: RANK Y
DISCRIMINATION:
• Waveform
IC901
1 V/DIV, 5 μsec/DIV
1.2 Vp-p
17.5
μsec
Note:
The components identi-
fi ed by mark
The components identi-
fi ed by mark
0 or dotted
line with mark
0 are criti-
cal for safety.
Replace only with part
number specifi ed.
Replace only with part
number specifi ed.
Note:
Les composants identifi és
par une marque
Les composants identifi és
par une marque
0 sont
critiques pour la sécurité.
Ne les remplacer que par
une piéce portant le nu-
méro spécifi é.
Ne les remplacer que par
une piéce portant le nu-
méro spécifi é.
XM-ZR4A
XM-ZR4A
11
11
3-1. BLOCK DIAGRAM
3
2
2
1
PRE AMP
IC801 (1/2)
1
GAIN CONTROL AMP
IC805 (1/2)
HPF
IC803 (1/2)
DIFFERENTIAL
AMP
Q103
POWER
AMP
Q110
DRIVE
AMP
Q104
DIFFERENTIAL
AMP
Q102
POWER
AMP
Q111
DRIVE
AMP
Q105
BIAS
Q106,107
REG
Q115
-30V
REG
Q114
+30V
REG
Q214
+30V
REG
Q215
-30V
REG
Q315
-40V
REG
Q314
+40V
REG
Q414
+40V
REG
Q415
-40V
BIAS
Q206,207
CNJ101 (1/2)
CN901
MUTE
SWITCH
Q101
+12V
GND
9
PRE AMP
IC801 (2/2)
DIFFERENTIAL
AMP
Q203
POWER
AMP
Q210
DRIVE
AMP
Q204
DIFFERENTIAL
AMP
Q202
MUTE
CONTROL
Q802
POWER
AMP
Q211
DRIVE
AMP
Q205
-3
-2
-4
FL
FR
RL
RR
-1
L
FRONT
INPUT
D906
D907
REAR
R
CN904 (1/2)
L
R
MUTE
SWITCH
Q201
1
2
2
14
12
REF.
REG
REG
CN904 (2/2)
F901
30A
SWITCHING
DRIVER
Q951
SWITCHING
DRIVER
Q950
DRIVER
Q952,953
8
10
11
3
D918
POWER/
PROTECTOR
FRONT
SPEAKER
OUT
DC-DC
CONVERTER
TRANSFORMER
T902
DC-DC CONVERTER
IC901
B+
SWITCH
Q905
OVERLOAD
DET
Q112
OVERLOAD
DET
Q212
CN903
L
(L+R)
R
REAR
SPEAKER
OUT
6
5
5
CNJ101 (2/2)
L
(L+R)
R
(L+R)
REM
+15V REG
Q807
–15V REG
Q808
PROTECTOR
DETECT
Q901,902
OVERLOAD
PROTECT
(REAR)
Q805,806
OVERLOAD
PROTECT
(FRONT)
Q803,804
POWER
ON/OFF
Q906
+30V
+15V
–30V
–15V
D851
RECT
D850
RECT
(FRONT)
(REAR)
HIGH
LEVEL
INPUT
F902
30A
PRE AMP
IC802 (1/2)
1
LPF
IC806 (1/2)
GAIN CONTROL AMP
IC807 (1/2)
DIFFERENTIAL
AMP
Q303
POWER
AMP
Q310,316
DRIVE
AMP
Q304
DIFFERENTIAL
AMP
Q302
POWER
AMP
Q311,317
DRIVE
AMP
Q305
MUTE
SWITCH
Q301
PRE AMP
IC802 (2/2)
DIFFERENTIAL
AMP
Q403
POWER
AMP
Q410,416
DRIVE
AMP
Q404
DIFFERENTIAL
AMP
Q402
POWER
AMP
Q411,417
DRIVE
AMP
Q108
DRIVE
AMP
Q109
DRIVE
AMP
Q208
DRIVE
AMP
Q209
DRIVE
AMP
Q308
DRIVE
AMP
Q309
DRIVE
AMP
Q408
DRIVE
AMP
Q409
DRIVE
AMP
Q405
MUTE
SWITCH
Q401
OVERLOAD
DET
Q412,413
5
OVERLOAD
DET
Q312,313
2
3
3
6
TEMP.DET
TH901-905
TH901-905
DC DET
Q813-815
TEMP.DET
Q900
LED DRIVER
Q903
R
(PROTECTOR)
G
(POWER)
THERMAL DET
Q914,915
SWITCHING
DRIVER
Q910,911
SWITCHING
DRIVER
Q912,913
DRIVER
Q908,909
DC-DC
CONVERTER
TRANSFORMER
T901
+39V
-39V
+40V
–40V
D804
RECT
D861
RECT
D860
RECT
D803
RECT
VCC
REF
D905
D903
D901,902
D921,922
(ILLUMINATOR-L)
D919,920
(ILLUMINATOR-R)
OVER
VOLTAGE
DETECT
Q907
2
HPF
3
2
7
7
GAIN CONTROL AMP
IC805 (2/2)
HPF
IC803 (2/2)
6
HPF
LPF
5
6
2
7
GAIN CONTROL AMP
IC807 (2/2)
3
1
MUTE
CONTROL
Q809
MUTE
CONTROL
Q810
MUTE
CONTROL
Q811
MUTE
CONTROL
Q812
15
16
16
1
7
SUBSONIC FILTER
IC804 (1/2)
2
BIAS
Q306,307
BIAS
Q406,407
RV802-1
RV802-2
RV801-2
RV803-1
RV801-1
RV805-1
RV804-1
RV804
S803-1
S802-1
S801-1
S801-2
RV802
LEVEL
LEVEL
HPF
OFF
LEVEL
S801
(HPF)
RV801
HIGH PASS
FILTER
LPF
OFF
S803
(LPF)
OFF
ON
S802
SUBSONIC
FILTER
(15Hz)
RV803
LOW PASS
FILTER
LOW BOOST
(40Hz)
• Signal path
: AUDIO
: AUDIO
SENSING
POWER ON
2
3
1
3
1
7
LPF
IC806 (2/2)
LPF
6
5
SUBSONIC FILTER
IC804 (2/2)
6
RV803-2
RV805-2
RV804-2
S803-2
S802-2
6
5
5
7
7
FAN MOTOR
ON/OFF
Q700,701
TEMP.DET
Q702,703
FAN901
DC FAN
DC FAN
CONTROL
Q704
RV805
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