Sony SRS-Z750 User manual

– 1 –
SERVICE MANUAL
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
SRS-Z750/Z750PC
STEREO ACTIVE SPEAKER SYSTEM
MICROFILM
SPECIFICATIONS
Amplifier section
Power output 7.5 W + 7.5 W
Input impedance 4.7 Kilohms (at 1 kHz)
Input Stereo mini jack (INPUT)
(SRS-Z750)
Stereo mini jack × 2 (INPUT 1, 2)
(SRS-Z750PC)
Speaker section
System Full-range, bass reflex type
Speaker unit Magnetically shielded ø65 mm
(2 5/8 inch)
Nominal Impedance 8 ohms
Rated input power 7.5 W
General
Power requirement DC IN 15 V jack accepts the
supplied SonyAC power adaptor
(left speaker only)
Dimensions Approx. 90 ×165 ×155 mm (3 5/8 ×
6 1/2 ×6 1/8 in.) (w/h/d) incl.
projecting parts and controls
Mass Left speaker: Approx. 850 g (1 lb. 14 oz.)
Right speaker:Approx. 750 g (1 lb. 10 oz.)
Supplied accessories AC power adaptor AC-S1510 (1)
Connecting cord (stereo miniplug
˜stereo miniplug) (1)
Design and specifications are subject to change without
notice.
The CE mark on the unit is valid only for products
marketed in the European Union.
Photo: SRS-Z750PC
Left
speaker Right
speaker
Ver 1.0 1998. 07

– 2 –
SECTION 1
GENERAL This section is extracted
from instruction manual.

SRS-Z750/Z750PC
– 3 – – 4 –
SECTION 2
DIAGRAMS
1
RIPPLE FILTER/
STARTING TIME
2
IN1
3
PRE GND
4
IN2
5
STANDBY
SIGNAL MUTE 6
VCC1 7
VCC2 8
–OUT2
+OUT2 9
POWER GND1
POWER GND2 10
+OUT1
–OUT1
11
12
13
14
+
–
+
–
INPUT
AMP
INPUT
AMP
OUTPUT
AMP
OUTPUT
AMP
• IC Block Diagram
IC1 LA4663
2-1. PRINTEDWIRING BOARD (SRS-Z750) 2-2. SCHEMATIC DIAGRAM (SRS-Z750)
D1 D-2
D2 D-3
D3 F-2
D4 F-2
IC1 D-2
Q1 E-3
Q2 E-3
• Semiconductor
Location
Ref. No. Location
Note:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•b: Pattern from the side which enables seeing.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•C: panel designation.
•U: B+ Line.
• Powervoltage is dc 15 V and fedwith regulated dc power
supply from external power voltage jack.
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are takenwithaVOM(Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: AUDIO

SRS-Z750/Z750PC
– 5 – – 6 –
1
RIPPLE FILTER/
STARTING TIME
2
IN1
3
PRE GND
4
IN2
5
STANDBY
SIGNAL MUTE 6
VCC1 7
VCC2 8
–OUT2
+OUT2 9
POWER GND1
POWER GND2 10
+OUT1
–OUT1
11
12
13
14
+
–
+
–
INPUT
AMP
INPUT
AMP
OUTPUT
AMP
OUTPUT
AMP
IC1 LA4663
• IC Block Diagram
2-3. PRINTEDWIRING BOARD (SRS-Z750PC) 2-4. SCHEMATIC DIAGRAM (SRS-Z750PC)
• Semiconductor
Location
Ref. No. Location
D1 D-2
D2 D-2
D3 F-2
IC1 D-2
IC2 E-3
Q1 D-3
Q2 D-3
Note:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•b: Pattern from the side which enables seeing.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•C: panel designation.
•U: B+ Line.
• Powervoltage is dc 15 V and fedwith regulated dc power
supply from external power voltage jack.
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are takenwithaVOM(Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: AUDIO

– 7 –
SECTION 3
EXPLODED VIEWS
NOTE:
• The mechanical parts with no reference
number in the exploded views are not supplied.
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
Ref. No. Part No. Description Remark
3-1. CABINET (L) SECTION
Ref. No. Part No. Description Remark
• Accessories and packing materials and
hardware (# mark) list are given in
the last of this parts list.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
• Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet’s Color
N
N
1
2
3
4
5
67
7
8
11
12
9
#1
#2
#3
#4
#3
#2
SP1
#2
#2
13
14
15
10
1 X-4950-204-1 GRILLE ASSY (Z750)
1 X-4950-416-1 GRILLE ASSY (Z750PC)
2 4-210-925-01 KNOB (Z750)
2 4-210-925-21 KNOB (Z750PC)
3 4-210-919-01 CABINET (L), FRONT (Z750)
3 4-210-919-11 CABINET (L), FRONT (Z750PC)
4 3-740-607-01 CUSHION
*5 4-210-933-01 PLATE, LIGHT GUIDE
6 4-210-927-01 PACKING (LARGE)
7 4-210-928-01 PACKING (SMALL)
8 4-210-921-01 CABINET (L), REAR (Z750)
8 4-210-921-21 CABINET (L), REAR (Z750PC)
9 4-210-929-01 PACKING (JACK)
10 4-210-931-01 PACKING (POWER)
*11 A-4542-541-A AMPLIFIER BOARD, COMPLETE (Z750PC:US)
*11 A-4542-542-A AMPLIFIER BOARD, COMPLETE
(Z750:EXCEPT US)
*11 A-4542-543-A AMPLIFIER BOARD, COMPLETE (Z750:US)
*11 A-4542-544-A AMPLIFIER BOARD, COMPLETE
(Z750PC:EXCEPT US)
12 4-210-932-01 PACKING (DC-IN)
13 4-964-032-01 SPRING, COIL
*14 4-210-930-01 ABSORBENT, ACOUSTIC (EXCEPT US)
*15 3-703-044-26 LABEL, CAUTION (US)
SP1 1-505-926-11 SPEAKER (065F042)

– 8 –
3-2. CABINET (R) SECTION
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
51
52
53
54 55
55
56
57
58
59
#2
#2
SP2
#2
#2
51 X-4950-204-1 GRILLE ASSY (Z750)
51 X-4950-416-1 GRILLE ASSY (Z750PC)
52 4-210-920-01 CABINET (R), FRONT (Z750)
52 4-210-920-21 CABINET (R), FRONT (Z750PC)
53 3-740-607-01 CUSHION
54 4-210-927-01 PACKING (LARGE)
55 4-210-928-01 PACKING (SMALL)
56 4-212-904-01 PACKING (CORD)
57 4-210-922-01 CABINET (R), REAR (Z750)
57 4-210-922-11 CABINET (R), REAR (Z750PC)
58 1-769-080-11 CORD (WITH PLUG) (Z750)
58 1-769-080-31 CORD (WITH PLUG) (Z750PC)
*59 4-210-930-01 ABSORBENT, ACOUSTIC (EXCEPT US)
SP2 1-505-926-11 SPEAKER (065F042)

– 9 –
SECTION 4
ELECTRICAL PARTS LIST
NOTE:
• Due to standardization, replacements in
the parts list may be different from the
parts specified in the diagrams or the
components used on the set.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
• RESISTORS
All resistors are in ohms.
METAL:Metal-film resistor.
METAL OXIDE: Metal oxide-film resistor.
F:nonflammable
• Abbreviation
CND : Canadian model
EE : East European model
SP : Singapore model
AUS : Australian model
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
• SEMICONDUCTORS
In each case, u : µ, for example:
uA.. : µA.. uPA.. : µPA..
uPB.. : µPB.. uPC.. : µPC.. uPD.. : µPD..
• CAPACITORS
uF : µF
• COILS
uH : µH
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
AMPLIFIER
*A-4542-542-A AMPLIFIER BOARD, COMPLETE
(Z750:EXCEPT US)
*A-4542-543-A AMPLIFIER BOARD, COMPLETE (Z750:US)
**************************
7-685-871-01 SCREW +BVTT 3X6 (S)
7-685-872-09 SCREW +BVTT 3X8 (S)
< CAPACITOR >
C1 1-124-903-11 ELECT 1uF 20% 50V
C2 1-124-903-11 ELECT 1uF 20% 50V
C3 1-130-474-00 MYLAR 0.0018uF 5% 50V
C4 1-136-165-00 FILM 0.1uF 5% 50V
C5 1-130-474-00 MYLAR 0.0018uF 5% 50V
C6 1-136-165-00 FILM 0.1uF 5% 50V
C7 1-136-169-00 FILM 0.22uF 5% 50V
C8 1-136-165-00 FILM 0.1uF 5% 50V
C9 1-136-165-00 FILM 0.1uF 5% 50V
C10 1-136-165-00 FILM 0.1uF 5% 50V
C11 1-136-165-00 FILM 0.1uF 5% 50V
C12 1-126-927-11 ELECT 2200uF 20% 10V
C13 1-104-664-11 ELECT 47uF 20% 25V
C14 1-124-907-11 ELECT 10uF 20% 50V
C15 1-136-169-00 FILM 0.22uF 5% 50V
C16 1-126-029-11 ELECT 3300uF 20% 25V
C17 1-126-961-11 ELECT 2.2uF 20% 50V
C18 1-124-907-11 ELECT 10uF 20% 50V
C19 1-126-233-11 ELECT 22uF 20% 50V
C20 1-124-907-11 ELECT 10uF 20% 50V
C21 1-162-294-31 CERAMIC 0.001uF 10% 50V
C22 1-162-294-31 CERAMIC 0.001uF 10% 50V
C23 1-162-294-31 CERAMIC 0.001uF 10% 50V
C24 1-162-294-31 CERAMIC 0.001uF 10% 50V
C25 1-162-292-31 CERAMIC 680PF 10% 50V
C26 1-162-292-31 CERAMIC 680PF 10% 50V
C29 1-162-294-31 CERAMIC 0.001uF 10% 50V
C30 1-162-294-31 CERAMIC 0.001uF 10% 50V
C31 1-162-294-31 CERAMIC 0.001uF 10% 50V
C32 1-162-294-31 CERAMIC 0.001uF 10% 50V
C33 1-162-294-31 CERAMIC 0.001uF 10% 50V
C34 1-162-294-31 CERAMIC 0.001uF 10% 50V
C37 1-162-294-31 CERAMIC 0.001uF 10% 50V
C38 1-136-169-00 FILM 0.22uF 5% 50V
< DIODE >
D1 8-719-911-19 DIODE 1SS119
D2 8-719-911-19 DIODE 1SS119
D3 8-719-110-08 DIODE RD8.2ES-B2
D4 8-719-822-26 LED TLG226 (POWER)
< FUSE >
F1 1-532-595-00 FUSE, GLASS TUBE (3.15A/125V) (US)
< IC >
IC1 8-759-538-94 IC LA4663
< JACK >
JK1 1-565-376-31 JACK (INPUT)
JK2 1-565-376-31 JACK (R OUT)
JK3 1-695-619-11 JACK, DC (DC IN 15V)
< TRANSISTOR >
Q1 8-729-205-83 TRANSISTOR 2SC2458L-GR
Q2 8-729-205-83 TRANSISTOR 2SC2458L-GR
< RESISTOR >
R1 1-249-417-11 CARBON 1K 5% 1/4W
R2 1-249-417-11 CARBON 1K 5% 1/4W
R3 1-247-843-11 CARBON 3.3K 5% 1/4W
R4 1-249-429-11 CARBON 10K 5% 1/4W
R5 1-247-842-11 CARBON 3K 5% 1/4W
R6 1-247-843-11 CARBON 3.3K 5% 1/4W
R7 1-249-429-11 CARBON 10K 5% 1/4W
R8 1-247-842-11 CARBON 3K 5% 1/4W
R9 1-249-407-11 CARBON 150 5% 1/4W
R10 1-249-407-11 CARBON 150 5% 1/4W
R11 1-249-429-11 CARBON 10K 5% 1/4W
R12 1-249-429-11 CARBON 10K 5% 1/4W
R15 1-249-385-11 CARBON 2.2 5% 1/6W
R16 1-249-385-11 CARBON 2.2 5% 1/6W
R17 1-249-385-11 CARBON 2.2 5% 1/6W
R18 1-249-385-11 CARBON 2.2 5% 1/6W
R19 1-249-435-11 CARBON 33K 5% 1/4W
R20 1-249-435-11 CARBON 33K 5% 1/4W
R21 1-249-429-11 CARBON 10K 5% 1/4W
R22 1-247-815-00 CARBON 220 5% 1/4W
R23 1-247-815-00 CARBON 220 5% 1/4W
When indicating parts by reference
number, please include the board.

– 10 –
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
R24 1-249-414-11 CARBON 560 5% 1/4W
R25 1-249-431-11 CARBON 15K 5% 1/4W
R26 1-249-429-11 CARBON 10K 5% 1/4W
< VARIABLE RESISTOR >
RV1 1-225-584-11 RES, VAR, CARBON 10K/10K (VOLUME)
< SWITCH >
SW1 1-771-302-11 SWITCH (POWER)
*************************************************************
*A-4542-541-A AMPLIFIER BOARD, COMPLETE (Z750PC:US)
*A-4542-544-A AMPLIFIER BOARD, COMPLETE
(Z750PC:EXCEPT US)
**************************
7-685-871-01 SCREW +BVTT 3X6 (S)
7-685-872-09 SCREW +BVTT 3X8 (S)
< CAPACITOR >
C1 1-124-903-11 ELECT 1uF 20% 50V
C2 1-124-903-11 ELECT 1uF 20% 50V
C3 1-124-903-11 ELECT 1uF 20% 50V
C4 1-124-903-11 ELECT 1uF 20% 50V
C5 1-136-164-00 FILM 0.082uF 5% 50V
C6 1-136-164-00 FILM 0.082uF 5% 50V
C7 1-130-472-00 MYLAR 0.0012uF 5% 50V
C8 1-130-472-00 MYLAR 0.0012uF 5% 50V
C9 1-124-903-11 ELECT 1uF 20% 50V
C10 1-124-903-11 ELECT 1uF 20% 50V
C11 1-124-907-11 ELECT 10uF 20% 50V
C12 1-124-907-11 ELECT 10uF 20% 50V
C13 1-124-903-11 ELECT 1uF 20% 50V
C14 1-124-903-11 ELECT 1uF 20% 50V
C15 1-136-169-00 FILM 0.22uF 5% 50V
C16 1-136-169-00 FILM 0.22uF 5% 50V
C17 1-124-907-11 ELECT 10uF 20% 50V
C18 1-104-664-11 ELECT 47uF 20% 25V
C19 1-136-165-00 FILM 0.1uF 5% 50V
C20 1-136-165-00 FILM 0.1uF 5% 50V
C21 1-136-165-00 FILM 0.1uF 5% 50V
C22 1-136-165-00 FILM 0.1uF 5% 50V
C23 1-126-927-11 ELECT 2200uF 20% 10V
C24 1-136-169-00 FILM 0.22uF 5% 50V
C25 1-126-029-11 ELECT 3300uF 20% 25V
C26 1-126-961-11 ELECT 2.2uF 20% 50V
C27 1-124-907-11 ELECT 10uF 20% 50V
C28 1-126-233-11 ELECT 22uF 20% 50V
C29 1-124-907-11 ELECT 10uF 20% 50V
C30 1-104-666-11 ELECT 220uF 20% 25V
C31 1-124-443-00 ELECT 100uF 20% 10V
C32 1-136-165-00 FILM 0.1uF 5% 50V
C33 1-124-443-00 ELECT 100uF 20% 10V
C34 1-124-443-00 ELECT 100uF 20% 10V
C40 1-162-294-31 CERAMIC 0.001uF 10% 50V
C41 1-162-294-31 CERAMIC 0.001uF 10% 50V
C42 1-162-294-31 CERAMIC 0.001uF 10% 50V
C43 1-162-294-31 CERAMIC 0.001uF 10% 50V
C44 1-162-294-31 CERAMIC 0.001uF 10% 50V
C45 1-162-294-31 CERAMIC 0.001uF 10% 50V
C46 1-162-294-31 CERAMIC 0.001uF 10% 50V
C47 1-162-294-31 CERAMIC 0.001uF 10% 50V
C48 1-162-294-31 CERAMIC 0.001uF 10% 50V
C49 1-162-294-31 CERAMIC 0.001uF 10% 50V
C54 1-162-294-31 CERAMIC 0.001uF 10% 50V
C55 1-162-294-31 CERAMIC 0.001uF 10% 50V
C56 1-162-294-31 CERAMIC 0.001uF 10% 50V
C57 1-162-294-31 CERAMIC 0.001uF 10% 50V
C58 1-162-294-31 CERAMIC 0.001uF 10% 50V
C59 1-162-294-31 CERAMIC 0.001uF 10% 50V
C60 1-162-294-31 CERAMIC 0.001uF 10% 50V
C61 1-162-294-31 CERAMIC 0.001uF 10% 50V
< DIODE >
D1 8-719-911-19 DIODE 1SS119
D2 8-719-911-19 DIODE 1SS119
D3 8-719-822-26 LED TLG226 (POWER)
< FUSE >
F1 1-532-595-00 FUSE, GLASS TUBE (3.15A/125V) (US)
< IC >
IC1 8-759-538-94 IC LA4663
IC2 8-759-634-51 IC M5218AP
IC3 8-759-708-08 IC NJM78L08A
< JACK >
JK1 1-565-376-31 JACK (INPUT (1))
JK2 1-565-376-31 JACK (INPUT (2))
JK3 1-565-376-31 JACK (R OUT)
JK4 1-695-619-11 JACK, DC (DC IN 15V)
< TRANSISTOR >
Q1 8-729-205-83 TRANSISTOR 2SC2458L-GR
Q2 8-729-205-83 TRANSISTOR 2SC2458L-GR
< RESISTOR >
R1 1-247-843-11 CARBON 3.3K 5% 1/4W
R2 1-247-843-11 CARBON 3.3K 5% 1/4W
R3 1-247-843-11 CARBON 3.3K 5% 1/4W
R4 1-247-843-11 CARBON 3.3K 5% 1/4W
R5 1-249-419-11 CARBON 1.5K 5% 1/4W
R6 1-249-419-11 CARBON 1.5K 5% 1/4W
R7 1-247-843-11 CARBON 3.3K 5% 1/4W
R8 1-247-842-11 CARBON 3K 5% 1/4W
R9 1-247-843-11 CARBON 3.3K 5% 1/4W
R10 1-247-863-11 CARBON 22K 5% 1/4W
AMPLIFIER

– 11 –
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
R11 1-247-863-11 CARBON 22K 5% 1/4W
R12 1-247-843-11 CARBON 3.3K 5% 1/4W
R13 1-247-843-11 CARBON 3.3K 5% 1/4W
R14 1-247-842-11 CARBON 3K 5% 1/4W
R15 1-249-407-11 CARBON 150 5% 1/4W
R16 1-249-407-11 CARBON 150 5% 1/4W
R17 1-249-429-11 CARBON 10K 5% 1/4W
R18 1-249-429-11 CARBON 10K 5% 1/4W
R19 1-247-863-11 CARBON 22K 5% 1/4W
R20 1-247-863-11 CARBON 22K 5% 1/4W
R21 1-247-863-11 CARBON 22K 5% 1/4W
R22 1-247-863-11 CARBON 22K 5% 1/4W
R23 1-249-439-11 CARBON 68K 5% 1/4W
R24 1-249-439-11 CARBON 68K 5% 1/4W
R25 1-249-417-11 CARBON 1K 5% 1/4W
R26 1-249-417-11 CARBON 1K 5% 1/4W
R29 1-249-385-11 CARBON 2.2 5% 1/6W
R30 1-249-385-11 CARBON 2.2 5% 1/6W
R31 1-249-385-11 CARBON 2.2 5% 1/6W
R32 1-249-385-11 CARBON 2.2 5% 1/6W
R33 1-249-435-11 CARBON 33K 5% 1/4W
R34 1-249-435-11 CARBON 33K 5% 1/4W
R35 1-249-429-11 CARBON 10K 5% 1/4W
R36 1-249-431-11 CARBON 15K 5% 1/4W
R37 1-249-429-11 CARBON 10K 5% 1/4W
R38 1-247-807-11 CARBON 100 5% 1/4W
R39 1-249-414-11 CARBON 560 5% 1/4W
R40 1-249-430-11 CARBON 12K 5% 1/4W
R41 1-249-430-11 CARBON 12K 5% 1/4W
R42 1-247-864-11 CARBON 24K 5% 1/4W
< VARIABLE RESISTOR >
RV1 1-225-584-11 RES, VAR, CARBON 10K/10K (VOLUME)
< SWITCH >
SW1 1-771-302-11 SWITCH (POWER)
*************************************************************
MISCELLANEOUS
***************
58 1-769-080-11 CORD (WITH PLUG) (Z750)
58 1-769-080-31 CORD (WITH PLUG) (Z750PC)
SP1 1-505-926-11 SPEAKER (065F042) (L-CH)
SP2 1-505-926-11 SPEAKER (065F042) (R-CH)
*************************************************************
ACCESSORIES & PACKING MATERIALS
********************************
1-473-851-11 ADAPTOR, AC (AC-S1510) (US,CND,EE)
1-473-852-11 ADAPTOR, AC (AC-S1510) (AEP,SP)
1-473-853-11 ADAPTOR, AC (AC-S1510) (UK)
1-475-756-11 ADAPTOR, AC (AC-S1510) (AUS)
3-864-433-21 MANUAL, INSTRUCTION (ENGLISH,SPANISH)
(US)
3-864-433-31 MANUAL, INSTRUCTION (ENGLISH,FRENCH,
GERMAN,SPANISH) (EXCEPT US)
3-864-433-41 MANUAL, INSTRUCTION (ITALIAN,DUTCH,
SWEDISH,PORTUGUESE) (AEP)
*************************************************************
**************
HARDWARE LIST
**************
#1 7-685-104-19 SCREW +P 2X6 TYPE2 NON-SLIT
#2 7-685-647-79 SCREW +BVTP 3X10 TYPE2 N-S
#3 7-685-871-01 SCREW +BVTT 3X6 (S)
#4 7-685-872-09 SCREW +BVTT 3X8 (S)
AMPLIFIER

– 12 –
Sony Corporation
Personal A&V Products Company
9-924-944-11
98G0483-1
PrintedinJapanC1998.7
Published by Quality Engineering Dept.
(Shibaura)
SRS-Z750/Z750PC