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Ver. 4
Please refer to the
MODIFICATION NOTICE.

SERVICE MANUAL
MODEL JP EU EC E2 EK E2A E1C EUT

AVR-4810CI
AVR-4810 s s

AV SURROUND RECEIVER

For purposes of improvement, specifications and design are subject to change without notice.

Please use this service manual with referring to the operating instructions without fail.

Some illustrations using in this service manual are slightly different from the actual set.

e
D&M Holdings lnc.

S0033-0V03DM/DG1002 Copyright 2010 D&M Holdings Inc. All rights reserved.
WARNING: Violators will be prosecuted to the maximum extent possible.
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.

LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis
resistance check. if the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power
cord is less than 460 kohms, the unit is defective.

CAUTION Please heed he points listed below during servicing and inspection.

Heed the cautions! Inspect for safety after servicing!
Spots requiring particular attention when servicing, such Check that all screws, parts and wires removed or
as the cabinet, parts, chassis,etc., have cautions indicated disconnected for servicing have been put back in their
on labels. be sure to heed these causions and the cautions original positions, inspect that no parts around the area that
indicated in the handling instructions. has been serviced have been negatively affected, conduct
an inslation check on the external metal connectors and
Caution concerning electric shock! between the blades of the power plug, and otherwise
(1) An AC voltage is impressed on this set, so touching check that safety is ensured.
internal metal parts when the set is energized could
cause electric shock. Take care to avoid electric (Insulation check procedure)
shock, by for example using an isolating transformer Unplug the power cord from the power outlet, disconnect
and gloves when servicing while the set is energized, the antenna, plugs, etc., and turn the power switch on.
unplugging the power cord when replacing parts, etc. Using a 500V insulation resistance tester, check that the
(2) Tere are high voltage parts inside. Handle with extra inplug and the externally exposed metal parts (antenna
care when the set is energized. terminal, headphones terminal, input terminal, etc.) is

Caution concerning disassembly and repaired.
assembly!
Through great care is taken when manufacturing parts
from sheet metal, there may in some rare cases be burrs CAUTION Concerning important safety
parts
are moved across them. Use gloves to protect your hands.
Many of the electric and structural parts used in the set
Only use designated parts! have special safety properties. In most cases these
The set's parts have specific safety properties (fire properties are difficult to distinguish by sight, and using
resistance, voltage resistance, etc.). For replacement parts, replacement parts with higher ratings (rated power and
be sure to use parts which have the same poroperties. In withstand voltage) does not necessarily guarantee that
particular, for the important safety parts that are marked safety performance will be poreserved. Parts with safety
z on wiring diagrams and parts lists, be sure to use the properties are indicated as shown below on the wiring
designated parts. diagrams and parts lists is this service manual. Be sure to
replace them with parts with the designated part number.
Be sure to mount parts and arrange the wires
as they were originally!
(1) Schematic diagrams ......Indicated by the z mark.
For safety seasons, some parts use tape, tubes or other
(2) Parts lists ......Indicated by the z mark.
insulating materials, and some parts are mounted away
Using parts other than the designated
from the surface of printed circuit boards. Care is also
taken with the positions of the wores omsode amd clamps
or other dangerous situations.
are used to keep wires away from heating and high voltage
parts, so be sure to set everything back as it was originally.

2
AVR-4810CI/AVR-4810
DIMENSION
AVR-4810CI/AVR-4810

3
AVR-4810CI/AVR-4810
WIRE ARRANGEMENT
If wire bundles are untied or moved to perform adjustment or parts replacement etc., be sure to rearrange them neatly as they
were originally bundled or placed afterward.
Otherwise, incorrect arrangement can be a cause of noise generation.

Wire arrangement viewed from the top

Front Panel side

Back Panel side

4
AVR-4810CI/AVR-4810
CAUTION IN SERVICING

If you cannot specify the cause of the digital PWB defect, carry out "Initializing" "Update to latest firmware".
The defect may be cleared.
See the following for the method of initializing the com.

Initializing AV SURROUND RECEIVER
AV SURROUND RECEIVER initialization should be performed when the