Sony XM-752EQX User manual

– 1 –
MICROFILM
SERVICE MANUAL
US Model
Canadian Model
AEP Model
UK Model
E Model
XM-752EQX
STEREO POWER AMPLIFIER
Other Specifications
Circuit system OTL (output transformerless)
circuit
Pulse power supply
Inputs RCA pin jacks
High level input connector
Outputs Speaker terminals
Through out pin jacks
Speaker impedance 2 – 8 Ω(stereo)
4 – 8 Ω(when used as a bridging
amplifier)
Maximum outputs 150 watts ×2 (at 4 Ω)
400 watts (monaural, at 4 Ω)
Rated outputs (supply voltage at 14.4V)
75 watts per channel (20 Hz –
20 kHz, 0.04% THD, at 4 Ω)
100 watts per channel (20 Hz –
20 kHz, 0.1% THD, at 2 Ω)
200 watts (monaural) (20 Hz –
20 kHz, 0.1% THD, at 4 Ω)
Frequency response 5 Hz – 100 kHz ( dB)
Harmonic distortion 0.005% or less
(at 1 kHz, 4 Ω)
Input level adjustment range
0.2 – 4.0 V (RCA pin jacks)
0.4 – 8.0 V (High level input)
High-pass filter 50 – 200 Hz, –12 dB/oct
Low-pass filter 50 – 200 Hz, –12 dB/oct
Equalizer 50 Hz, 200 Hz, 800 Hz, 3.2 kHz,
12.8 kHz ±12 dB
Power requirements 12 V DC car battery
(negative ground)
Power supply voltage 10.5 – 16 V
Current drain At rated output: 20 A
Remote input: 1.5 mA
Dimensions Approx. 260 ×55 ×220 mm
(10 1/4 ×2 1/4 ×8 3/4 in.)
(l/h/p) not incl. projecting parts
and controls
Mass Approx. 2.2 kg (4 lb. 14 oz.)
not incl. accessories
Supplied accessories Mounting screws (4),
Terminal cap (1)
Design and specifications are subject to change without
notice.
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS (US, Canadian model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
75 watts per channel minimum continuous average power into
4 ohms, both channels driven from 20 Hz to 20 kHz with no more
than 0.04% total harmonic distortion per Car Audio Ad Hoc
Committee standards.
+0
–3

– 2 –
TABLE OF CONTENTS
1. GENERAL
Location and Function of Controls.......................................... 3
Connections ............................................................................. 3
2. DISASSEMBLY
2-1. Bottom Plate........................................................................ 6
2-2. Panel (A) ............................................................................. 6
2-3. Panel (B).............................................................................. 7
2-4. AMP Board ......................................................................... 7
2-5. Control Panel Block ............................................................ 8
3. DIAGRAMS
3-1. Block Diagram .................................................................... 9
3-2. Printed Wiring Board –AMP Section–.............................. 11
3-3. Schematic Diagram –AMP Section– ................................ 13
3-4. Schematic Diagram –PRE Section–.................................. 15
3-5. Printed Wiring Board –PRE Section– ............................... 15
3-6. Schematic Diagram –EQ Section–.................................... 17
3-7. Printed Wiring Board –EQ Section– ................................. 17
3-8. Printed Wiring Board –IND Section– ............................... 19
3-9. Schematic Diagram –IND Section– ..................................20
3-10. Printed Wiring Board –LED Section–............................... 21
3-11. Schematic Diagram –LED Section– ................................. 22
4. EXPLODED VIEWS
4-1. Heat Sink Section .............................................................. 24
4-2. Control Panel Section........................................................ 25
5. ELECTRICAL PARTS LIST ........................................ 26
Notes on Chip Component Replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

– 3 –
SECTION 1
GENERAL This section is extracted
from instruction manual.

– 4 –

– 5 –

– 6 –
1 BTP 3x5
2 BTP 3x4
3 BTP 3x
4
4 bottom plate
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. BOTTOM PLATE
2-2. PANEL (A)
1 BTP 3x8
2 BTP 3x8
3 panel (A
)

– 7 –
1 BTP 3x12
2 BTP 3x12
4 BVTP 3x12
5 screw (3x8) (CZN-N)
3 fuse
(30A)
6 AMP board
2-3. PANEL (B)
2-4. AMP BOARD
2 BTP 3x8
1 BTP 3x8
3 panel (B
)

– 8 –
1 claw
2 claw
3 CNP804
4 CNP803
5 CNJ805
6 CNJ802
7 control panel bloc
k
2-5. CONTROL PANEL BLOCK

3-1. BLOCK DIAGRAM
– 9 – – 10 –
XM-752EQX
SECTION 3
DIAGRAMS
CNJ801
OUTPUT
(THROUGH)
L
(MONO)
INPUT
L
(MONO) +
+
CNJ801
+
+
CN803
L
CN801
+B
REM
LINE AMP
IC101
R-CH
R-CH
FILTER
IC103 (2/2)
12
FILTER
IC103 (1/2)
76
VR101-1
LPF
OFF
HPF
S101
FILTER EQ AMP
VR101
FILTER
S102
DIRECT
BUFFER
IC111
LINE
SWITCH
Q112
75
LINE
CONTROL
B– (AMP) B+(AMP)
Q813, 814
POWER
ON/OFF
Q901
B+
SWITCH
Q902 , 903
LED
DRIVE
SWITCH
Q807
F901
3
16 1 10 9
ON/OFF
CONTROL OSC
12
DC-DC CONVERTER
CONTROL
IC901
TH802 TH801
PROTECT
LATCH
Q809, 812
ON/OFF
DRIVE
ON/OFF
DRIVE
Q905, 907
+6V
REG
Q904
Q906, 908
(CURRENT CHECK)
PROTECT
CHECH
Q808, 811
(CURRENT CHECK)
T901
DC-DC CONVERTER
TRANSFORMER D912
+6V
+15V
REG
Q911, 913
–15V
REG
Q912, 914
B+ (AMP)
+15V
–15V
B– (AMP)
B+ (PRE)
B– (PRE)
D901
D902
D903
D904
DRIVER
Q101 – 106
POWER
AMP
Q107 – 110
OVER LOAD
DET
Q111
VOLTAGE
CHECK
Q815-817
SIGNAL METER AMP
IC801
75 1
12 – 15 16 – 21
LED
DRIVE
Q801 – 804 LD801 – 824
LED
CONTROL
IC802
L
R
MONOL+R
CN802
R-CH
VR107
LEVEL
–1
–3
OUTPUT
(THROUGH)
R
INPUT
R
–2
–4
HIGH
LEVEL
INPUT
VCC
LEVEL
METER
POWER/PROTECTOR
THERMAL
Signal path
: AUDIO
+
–
67
5+
–
21
3
EQ
IC102
VR101-2
+
–
67
5
IC106-109
VR102 50Hz
VR103 200Hz
VR104 800Hz
VR105 3.2kHz
VR106 12.8kHz
EQUALIZER
EQ BUFFER
IC105
OFF
ON
DC DET
IC901
42
31
B+
AC1 IN
D4–D1 O6–O1
Q810
B+
LD827
LED
DRIVE
SWITCH
Q806
OFFSET
B+
LD826
LED
DRIVE
SWITCH
Q806
OVER
CURRENT
B+
LD825
B+
D801
R
SPEAKER OUT

– 11 – – 12 –
XM-752EQX
3-2. PRINTED WIRING BOARD — AMP SECTION —
Note:
•X: parts extracted from the component side.
•b: Pattern from the side which enables seeing.
Ref. No. Location
D101 C-2
D102 D-3
D201 C-4
D202 D-5
D801 E-9
D802 F-9
D803 F-2
D806 E-1
D901 C-9
D902 D-9
D903 A-8
D904 A-9
D905 C-8
D906 D-8
D907 A-6
D908 A-6
D909 D-5
D910 G-9
D911 G-9
D912 D-9
IC101 H-3
IC801 D-3
IC901 F-9
IC902 G-8
Q101 D-2
Q102 C-2
Q103 C-2
Q104 C-3
Q105 A-3
Q106 A-2
Q107 B-1
Q108 B-1
Q109 A-3
Q110 A-2
Q111 A-2
Q112 D-2
Q201 C-4
Q202 C-4
Q203 C-4
Q204 C-4
Q205 A-5
Q206 A-5
Q207 A-4
Q208 A-4
Q209 A-6
Q210 A-4
Q211 A-5
Q212 D-4
Q808 E-9
Q809 E-9
Q810 E-8
Q811 D-9
Q812 E-8
Q813 F-1
Q814 E-2
Q815 H-4
Q816 G-4
Q817 H-4
Q901 I-9
Q902 F-10
Q903 G-9
Q904 E-5
Q905 C-9
Q906 C-10
Q907 A-9
Q908 A-10
Q911 A-6
Q912 A-6
• Semiconductor
Location
(Page 19)
(Page 16)
(Page 21)
(Page 17)