SERVICE MANUAL
Sony Corporation
Audio Group
Published by Sony Engineering Corporation
STR-K760P
Canadian Model
E Model
Australian Model
FM STEREO FM-AM RECEIVER
-- Continued on next page --
SPECIFICATIONS
Ver 1.1 2004.10
Manufactured under license from Dolby Laboratories.
"Dolby", "Pro Logic" and the double-D symbol are trademarks of
Dolby Laboratories.
"DTS" and "DTS Digital Surround" are registered trademarks of
Digital Theater Systems, Inc.
9-877-666-02
2004J16-1
© 2004.10
· STR-K760P is the tuner and the amplifier
section in HT-DDW760.
Power Output1)
Models of area code CA
(6 ohms 1 kHz, THD 0.7%)
FRONT2): 60 W/ch
CENTER2): 60 W
SURR2): 60 W/ch
FRONT2): 100 W/ch
CENTER2): 100 W
SURR2): 100 W/ch
FRONT2): 80 W/ch
CENTER2): 80 W
SURR2): 80 W/ch
(6 ohms 1 kHz, THD 10%)
FRONT2): 100 W/ch
CENTER2): 100 W
SURR2): 100 W/ch
(6 ohms 1 kHz, THD 10%)
(6 ohms 1 kHz, THD 0.7%)
Models of area code SP, E51
FRONT2): 45 W/ch
CENTER2): 45 W
SURR2): 45 W/ch
(6 ohms 120 Hz - 20 kHz, THD 0.09%)
Models of area code AU
Amplifier section
FRONT2): 100 W/ch
CENTER2): 100 W
SURR2): 100 W/ch
(6 ohms 1 kHz, THD 10%)
FRONT2): 80 W/ch
CENTER2): 80 W
SURR2): 80 W/ch
(6 ohms 1 kHz, THD 0.7%)
1) Measured under the following conditions:
CA
120 V AC, 60 Hz
SP
230 V AC, 50 Hz
AU, E51
240 V AC, 50 Hz
Area code
Power requirements
2) Depending on the sound field settings and the
source, there may be no sound output.
Inputs (Analog)
CD, MD/TAPE,
VIDEO 1, 2, DVD
Sensitivity: 800 mV
Impedance: 50 kiloohms
Inputs (Digital)
DVD (Coaxial)
Sensitivity: -
Impedance: 75 ohms
VIDEO 2 (Optical)
Sensitivity: -
Impedance: -
2
STR-K760P
Outputs (Analog)
Reproduction frequency range:
Tone
28 - 20,000 Hz
MD/TAPE (OUT),
VIDEO 1 (AUDIO OUT)
Voltage: 800 mV
Impedance: 10 kiloohms
Gain levels
±6 dB, 1 dB step
SUB WOOFER
Voltage: 2 V
Impedance: 1 kiloohms
FM tuner section
Tuning range
AM tuner section
Antenna
Antenna terminals
87.5 - 108.0 MHz
FM wire antenna
75 ohms, unbalanced
Intermediate Frequency
10.7 MHz
Tuning range
Models of area code CA
With 10-kHz tuning scale:
530 - 1,710 kHz3)
With 9-kHz tuning scale:
531 - 1,710 kHz3)
Models of area code E51
With 10-kHz tuning scale:
530 - 1,610 kHz3)
With 9-kHz tuning scale:
531 - 1,602 kHz3)
With 9-kHz tuning scale:
531 - 1,602 kHz
Antenna
Loop antenna
Intermediate Frequency
3) You can change the AM tuning scale to 9 kHz or
10 kHz. After tuning in any AM station, turn off the
receiver. While holding down PRESET TUNING +
or TUNING +, press ?/1. All preset stations will be
erased when you change the tuning scale. To reset
the scale to 10 kHz (or 9 kHz), repeat the procedure.
450 kHz
Models of area code SP, AU
Video section
Inputs/Outputs
Video:
1 Vp-p, 75 ohms
General
Power requirements
CA
120 V AC, 60 Hz
AU
240 V AC, 50 Hz
SP
220 - 230 V AC, 50/60 Hz
Area code
Power requirements
Power consumption
Power consumption (during standby mode)
Dimensions (w/h/d) (Approx.)
Mass (Approx.)
Design and specifications are subject to change without notice.
· Abbreviation
AU : Australian model
CA : Canadian model
E51: Chilean and Peruvian models
SP : Singapore and Malaysia models
CA
225 VA
AU, SP
150 W
E51
165 W
0.3 W
6.5 kg (14 lb 6 oz)
430
× 145 × 301.5 mm
(17
× 5 6/8 × 11 7/8 inches)
including projecting parts
and controls
Area code
Power consumption
E51
120/220/240 V AC, 50/60 Hz
3
STR-K760P
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, "metallized" knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers' instructions to use these
instruments.
2.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The "limit" indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µF
1.5 k
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be
damaged by heat.
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
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
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
heated tip is applied for too long, so be careful!
· Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
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.
Parts No.
MODEL IDENTIFICATION
BACK PANEL
MODEL
PARTS No.
Canadian model
4-252-087-5s
Australian model
4-252-087-6s
Singapore and Malaysia models
4-252-087-7s
E51 model
4-252-088-7s
·Abbreviation
E51 : Chilean and Perurian models.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
4
STR-K760P
TABLE OF CONTENTS
1. GENERAL ··································································· 5
2. TEST MODE ······································································ 9
3. DIAGRAMS
3-1. Circuit Board Location ··············································· 11
3-2. Block Diagrams MAIN Section ··························· 12
DISPLAY/POWER Section ································· 13
3-3. Printed Wiring Board
DIGITAL Board (Side A) ····································· 14
3-4. Printed Wiring Board
DIGITAL Board (Side B) ····································· 15
3-5. Schematic Diagram DIGITAL Section (1/2) ······· 16
3-6. Schematic Diagram DIGITAL Section (2/2) ······· 17
3-7. Printed Wiring Board MAIN Section ··················· 18
3-8. Schematic Diagram MAIN Section (1/2) ············· 19
3-9. Schematic Diagram MAIN Section (2/2) ············· 20
3-10. Printed Wiring Board VIDEO Board ··················· 21
3-11. Schematic Diagram VIDEO Board ······················ 21
3-12. Printed Wiring Board POWER Section ··············· 22
3-13. Schematic Diagram POWER Section ·················· 23
3-14. Printed Wiring Board FRONT PANEL Section ··· 24
3-15. Schematic Diagram FRONT PANEL Section ······ 25
3-16. IC Pin Function Descriptions ····································· 29
4. EXPLODED VIEWS
4-1. Front Panel Section ···················································· 31
4-2. Chassis Section ·························································· 32
5. ELECTRICAL PARTS LIST ····································· 33
5
STR-K760P
SECTION 1
GENERAL
This section is extracted
from instruction manual.
A.F.D. (button/indicator) 9 (27,
2
46)
8, 29, 45)
CD wg (20)
DIMMER 3 (25)
DISPLAY 2 (23, 25, 46)
Display 5 (23, 25)
DVD wj (20)
ENTER qd (17, 34, 46)
MAIN MENU qj (17, 30, 32, 34)
MAS
MD/TAPE wh (20)
TER VOLUME
-/+ qs (19,
20, 45)
MEMORY wa (22)
MOVIE (button/indicator) 0
(28, 45)
MUSIC (button/indicator) qa (29,
45)
PHONES (jack) wd (20, 26, 45)
PR
TUNING FM/AM wf (20, 21, 34)
ESET TUNING
-/+ ql (22,
48)
TUNING
-/+ w; (21, 48)
VIDEO 1 wl (20)
VIDEO 2 wk (20)
2CH (button/indicator) 8 (27,
29, 31)
+/- qg (17, 30, 32, 34)
</> qh (17, 30, 32, 34)
?/1 (power) 1 (17, 22, 46, 48)
ALPHABETICAL ORDER
A - L
M - Z
NUMBERS AND SYMBOLS
FM MODE ws (21)
Input buttons qk (20, 30, 33, 34,
INPUT MODE qf (26, 30)
(receptor) 4 (37, 46)
Main unit
4
23
5
1
qk
ws
w;
ql
wa
qfqd
qg
qs
8 9q; qa
wd
qh
qj
wf
wg
wh
wj
wk
wl