DHC-AZ3DM, DHC-AZ7DM, HCD-AZ3DM, HCD-AZ7DM - Sony Audio Service Manual (repair manual). Page 2

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2
HCD-AZ3DM/AZ7DM
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.
Flexible Circuit Board Repairing
Keep  the temperature of the soldering iron around 270 ˚C
during repairing.
Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
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.
This appliance is 
classified as a CLASS 1 
LASER product. This 
marking is located on the 
rear exterior.
When the self-diagnosis function is activated to 
prevent the system from malfunctioning, a 5-
character service number (e.g., C 13 50) with a 
combination of a letter and 4 digits appears on 
the screen and the front panel display. In this 
case, check the following table.
Self-diagnosis Function 
(When letters/numbers appear in the 
display)
First 3 
characters of 
the service 
number
Cause and/or corrective action
C 13
The disc is dirty.
,Clean the disc with a soft cloth .
C 31
The disc is not inserted correctly.
,Restart the system, then reinsert 
the disc correctly.
E XX
(xx is a number)
To prevent a malfunction, the 
system has performed the self-
diagnosis function.
,Contact your nearest Sony 
dealer or local authorized Sony 
service facility and give the 5-
character service number.
Example: E 61 10
SELF  DIAGNOSIS  FUNCTION
Tun er section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
87.5 – 108.0 MHz 
(50-kHz step)
Antenna
FM lead antenna
Antenna terminals
75 ohms unbalanced
Intermediate frequency
10.7 MHz 
AM tuner section
Tuning range
530 – 1,710 kHz 
(with the interval set at 
10 kHz)
531 – 1,602 kHz 
(with the interval set at 
9 kHz)
Antenna
AM loop antenna
Antenna terminals
External antenna terminal
Intermediate frequency
450 kHz
General
Power requirements
Australian model:
230 – 240 V AC, 50 /60 Hz
Indian model:
220 –240 V AC, 
50/60 Hz
Thai model:
220 V AC,  50/60 Hz
Korean model:
220 V AC , 60 Hz
Other models:
120 V, 220  – 240 V AC , 
50/60 Hz
Adjustable with voltage 
selector
Power consumption
HCD-AZ7DM
180 watts
HCD-AZ3DM
110 watts
Dimensions (w/h/d)
HCD-AZ7DM
Approx. 190  381   
317 mm
HCD-AZ3DM
Approx. 190  381   
317 mm
Mass
HCD-AZ7DM
Approx. 6.4 kg
HCD-AZ3DM
Design and specifications are subject to change
without notice.
Approx. 5.9 kg
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