HT-DDW685, STR-K685 - Sony Audio Service Manual (repair manual). Page 2

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2
STR-K685
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 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.
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
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.
About area codes
The area code of the receiver you purchased is 
shown on the lower right portion of the rear panel 
(see the illustration below).
Any differences in operation, according to the area 
code, are clearly indicated in the text, for example, 
“Models of area code AA only”.
FRONT
CENTER
L
R
L
R
SPEAKERS
Area code
AM tuner section
Tuning range
Models of area code SP, SP6, TH
With 9-kHz tuning scale:
531 – 1,602 kHz
Models of area code E51:
With 10-kHz tuning scale:
530 – 1,610 kHz
4)
With 9-kHz tuning scale:
531 – 1,602 kHz
4)
Models of area code AR, MX
With 10-kHz tuning scale:
530 – 1,610 kHz
Antenna
Loop antenna
Intermediate frequency
450 kHz
4)
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 MOVIE, 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.
General
Power requirements
Power consumption
Power consumption (during standby mode)
0.3 W
Dimensions (w/h/d) (Approx.)
429 
×
 145 
×
 308 mm 
(16 7/8 
×
 5 6/8 
×
 12 1/8 
inches) 
including projecting parts 
and controls
Mass (Approx.)
7.4 kg (16 lb 9 oz)
Area code
Power requirements
SP, SP6, TH  
230 – 240 V AC, 50/60 Hz
E51
120/220/240 V AC, 
50/60 Hz
AR
220 – 230 V AC, 50/60 Hz
MX
127 V AC, 60 Hz
Area code
Power consumption
SP, SP6, E51, AR, 
MX, TH
190 W
Design and specifications are subject to 
change without notice.
• Abbreviation
AR
: Argentine model
E51
: Chilean and Peruvian models
MX
: Mexican model
SP
: Singapore model
SP6
: Singapore and Malaysia models
TH
: Thai model
Ver. 1.2
Model
Part No.
SP and SP6 models
2-896-343-0
[]
E51 model
2-896-343-1
[]
MX model
2-896-343-2
[]
AR model
2-896-343-3
[]
TH model
2-896-343-7
[]
Parts No.
MODEL IDENTIFICATION
– Rear Panel –
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