SERVICE PROCEDURE
DHC-40.1
1. Replacing the fuses
This symbol located near the fuse indicates that the
fuse used is show operating type, For continued protection against
fire hazard, replace with same type fuse, For fuse rating, refer to
the marking adjacent to the symbol.
Ce symbole indique que le fusible utilise est e lent.
Pour une protection permanente, n'utiliser que des fusibles de meme
type. Ce demier est indique la qu le present symbol est apposre.
2. To initialize the unit
1. Press and hold down
VCR/DVR
button, then press
ON/STANDBY
button when the unit is powered on.
2. After "
C l e a r
" is displayed, the preset memory and each mode stored in the memory are initialized and will
return to the factory settings, and turn to Standby mode.
3. Safety check out
REF NO.
PART NAME
DESCRIPTION
PART NO.
REMARKS
F4000
F4000 or
F4001
F4001 or
F901
F901 or
FUSE
FUSE
FUSE
FUSE
FUSE
FUSE
4A-UL/T-233
4A-T/UL-ST2
4A-UL/T-233
4A-T/UL-ST2
5A-UL/T-233
5A-T/UL-AT2
252325GR
252257GR
252325GR
252257GR
252326GR
252258GR
<Notes>
: DHC-40.1 North American model
<DD>
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(U.S.A. model only)
After correcting the original service problem, perform the following safety check before releasing the unit to
the customer.
Leakage current Check
Measure the leakage current to a known earth ground (water pipe or conduct etc.) by connecting a leakage current
tester between the earth ground and exposed metal parts of the unit (input/output ground terminals, screw heads or
metal overlays etc.).
Plug the power supply cord directly into a 120Vac 60Hz wall socket and turn
ON/STANDBY
button on.
Any current measured must not exceed 0.5mA.
This model uses a EE-PROM IC in order to retain radio presets and other settings. So, memory contents will be
kept eternally with no care.
4. Memory Backup
