Servicing Notes - Sony DPS-V55 Service Manual

ROM VERSION CHECK
• This system have ROM version check function consequently key
set up of when power on.
(No need in open the main body)
[ENTER]
1) Press three buttons
taneously, in the power off.
2) Fluorescent indicator tube indicate ROM version about 1 sec-
ond, and restart system.
Ver 1.00
UPDATING THE ROM (IC704) VERSION
The ROM version may be updated in order to fix the bugs or add
the functions. "All Initialize!!" is displayed and internal data are
automatically initialized, if the power is turned on after replacing
the ROM. In this case, the user preset data and system data cannot
be restored. Please notify the users of this matter.
If the same version ROM was replaced for repair, not for version
updating, the data are not initialized unless internal data are dam-
aged.
Nevertheless, to avoid a trouble, it is recommended to save inter-
nal data using the Data Filer, etc.
The initial version of the ROM will be Ver.1.00 part No. 8-759-
499-74.
Note: Internal data mentioned above are all saved in the IC702 (CY6225LL)
when the power is turned off.
REPLACING THE BATTERY
The built-in battery must be replaced, if "Battery Low!" is dis-
played at the power ON. When the battery was used up com-
pletely, internally saved data (system data, user preset data, etc.)
are all cleared, and "Ext. RAM Error!" "All Initialize!!" are dis-
played at the power ON, then the data are initialized to the factory
setting automatically. In this case, the user preset data and system
data cannot be restored. Please notify the users of this matter.
Unless "Ext. RAM Error" "All Initialize!!" are displayed at the
power ON, internal data are still saved, and in this case, internal
data are kept unchanged if the battery is replaced while the power
is turned on.
To avoid a trouble, it is recommended to save internal data using
the Data Filer, etc.
This information is given to the users on page 19 of the Operation
Manual.
SECTION 1

SERVICING NOTES

[EXIT] [POWER]
, , and simul-
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.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the manufacturer.
Discard used batteries according to the manufacturer's instructions.
Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
Eksplosjonsfare ved feilaktig skifte av batteri.
Benytt samme batteritype eller en tilsvarende type
anbefalt av apparatfabrikanten.
Brukte batterier kasseres i henhold til fabrikantens
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en likvärdig typ som
rekommenderas av apparattillverkaren.
Kassera använt batteri enligt gällande föreskrifter.
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
– 3 –
CAUTION
ADVARSEL!
ADVARSEL
instruksjoner.
VARNING
VAROITUS