Denon dn-sc2000 ver-1 Manuale Di Servizio

2

The following check should be performed for the continued protection of the customer and service technician.

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.
Be sure to test for leakage current with the AC plug in both polarities, in addition, in each power ON, OFF and STANDBY 
mode, if applicable.

◎ Heed the cautions!

Spots requiring particular attention when servicing, such 
as the cabinet, parts, chassis,etc., have cautions indicated 
on labels. be sure to heed these causions and the 
cautions indicated in the handling instructions.

◎ Caution concerning electric shock!

(1)  An AC voltage is impressed on this set, so touching 

internal metal parts 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, 
unplugging the power cord when replacing parts, etc.

(2)  Tere are high voltage parts inside. Handle with extra 

care when the set is energized.

◎  Caution concerning disassembly and 

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

◎ Only use designated parts!

The set's parts have specific safety properties (fire 
resistance, voltage resistance, etc.). For replacement 
parts, be sure to use parts which have the same 
poroperties. In particular, for the important safety parts 
that are marked z on wiring diagrams and parts lists, be 
sure to use the designated parts.

◎  Be sure to mount parts and arrange the wires 

For safety seasons, some parts use tape, tubes or other 
insulating materials, and some parts are mounted away 
from the surface of printed circuit boards. Care is also 
taken with the positions of the wores omsode amd clamps 
are used to keep wires away from heating and high 
voltage parts, so be sure to set everything back as it was 
originally.

◎ Inspect for safety after servicing!

Check that all screws, parts and wires removed or 
disconnected for servicing have been put back in their 
original positions, inspect that no parts around the area 
that has been serviced have been negatively affected, 
conduct an inslation check on the external metal 
connectors and between the blades of the power plug, 
and otherwise 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. 
Using a 500V insulation resistance tester, check that the 
inplug and the externally exposed metal parts (antenna 
terminal, headphones terminal, input terminal, etc.) is 
1MΩ or greater. If it is less, the set must be inspected and 
repaired.

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

(1) Schematic diagrams ......Indicated by the z mark.
(2) Parts lists ......Indicated by the z mark.

Using parts other than the designated 
parts could result in electric shock, fi res 
or other dangerous situations.