Denon PMA 710 AE Service Manual

Page 1

DENON

Ver. 8

f-V
Please refer to the
MODIFICATION NOTICE.

SERVICE MANUAL

MODEL

JP E3 E2 EK

E2A

E1C

E1K EUT

PMA-71 OAE \/

INTEGRATED STEREO AMPLIFIER

' 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.

DENON

D&M Holdings Inc.

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

SOZ7970V08DM/DGI 1 05

Copyright 2011 D&M Holdings Inc. All rights reserved.
WARNING: Violators will be prosecuted to the maximum extent possible.

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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 the points listed below during servicing and inspection.

© Heed the cautions!

Spots requiring particular attention when servicing, such
as the cabinet, pans, chassis, etc., have cautions indicated
on labels or seals. Be sure to heed these cautions and the
cautions indicated in the handling instructions.

©Caution concerning electric shock!

(1) An AC voltage is impressed on this set, so touching in-
ternal metal pans when the set is energized could
cause electric shock. Take care to avoid electric shock,
by for example using an isolating transformer and
gloves when servicing while the set is energized, un-
plugging the power cord when replacing pans, etc.

(2)There are high voltage pans inside. Handle with extra
care when the set is energized.

©Caution concerning disassembly and
assembly!

Though great care is taken when manufacturing pans from
sheet metal, there may in some rare cases be burrs on the
edges of pans which could cause injury if fingers are
moved across them. Use gloves to protect your hands.

©Only use designated parts!

The sets parts have specific safety properties (fire resis»
tance, voltage resistance, etc.). For replacement pans, be
sure to use parts which have the same properties. In par»
ticular, for the important safety pans that are marked A on
wiring diagrams and parts lists, be sure to use the desig»
nated pans.

©Be sure to mount parts and arrange
the wires as they were originally!

For safety reasons, some pans use tape, tubes or other in-
sulating materials, and some pans are mounted away from
the surface of printed circuit boards. Care is also taken with
the positions of the wires inside and clamps are used to
keep wires away from heating and high voltage pans, so
be sure to set everything back as it was originally.

2

© Inspect for safety after servicing!

Check that all screws, pans and wires removed or discon-
nected for servicing have been put back in their original po-
sitions, inspect that no parts around the area that has been
serviced have been negatively affected, conduct an insu-
lation check on the external metal connectors and between
the blades of the power plug, and othenivise check that
safety is ensured.

(Insulation check procedure)

Unplug the power cord from the power outlet, disconnect
the antenna, plugs, etc., and turn the power switch on. Us-
ing a 500V insulation resistance tester, check that the in-
sulation resistance between the terminals of the power
plug and the externally exposed metal pans (antenna ter-
minal, headphones terminal, microphone terminal, input
terminal, etc.) is 1M0 or greater. If it is less, the set must
be inspected and repaired.

CAUTION Concerning important safety

parts

Many of the electric and structural parts used in the set
have special safety properties. In most cases these prop-
enies are difficult to distinguish by sight, and using re-
placement pans with higher ratings (rated power and
withstand voltage) does not necessarily guarantee that
safety performance will be preserved. Parts with safety
propenies are indicated as shown below on the wiring dia-
grams and pans lists is this service manual. Be sure to re-
place them with parts with the designated part number.

(1) Schematic diagrams Indicated by the A mark.
(2) Parts lists Indicated by the [k mark.

Using pans other than the designated
pans could result in electric shook, fires or
other dangerous situations.

PMA-710AE