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Philips Semiconductors
User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)
Application Note
96029
Change history of: Diagrams and performance of R(B)DS Car Radio CCR612 with
Cassette Deck.
DIFFERENCES WITH PREVIOUS CCR612 (AN95070).
Mainboard part 1:
Two diodes were added to improve reset behaviour
In case a static on/off key is used, C144/C154/C151 must be 10µF i.s.o. 100nF.
Mainboard part 2:
Option diode D8 is removed. Option diode D2 is now connected to pin 21.
Option diode D4 and D6 are removed.
DIFFERENCES WITH PREVIOUS CCR612 (AN94067).
This note,Diagramsand Performance,valid forCCR612 radiosample(version D)controlled byCCR610S
or CCR612S software (the latter, also for CDC-changer control), differs mainly from the previous one
(Version 1.0) by the following modifications and corrections.
Modifications and Improvements.
General:
Component numberingCCR612 radiosample. Unlikeprevious note,the electricalcomponentnumbers
of the PCBboards (Fig. 13band Fig. 13d) domatch with theelectrical diagrams (Fig.4, Fig.7and Fig.9),
which belong to the CCR612 radio sample (Version D).
Main Board part 1a, 1b and 1c (pages 14, 15 and 16).
- A CDC-changer interface circuit has been introduced, using an extra TDA8579T and intended for
CDC-changer SCC600, controlled by CCR612S software.
- Switched battery voltage circuit improved. Which delivers for external use a battery voltage only
when the radio is in the Power On mode for; supplying the illumination of the detachable front and
delivering a switched plus voltage for the line-out, motor antenna and CDC-changer.
- A telephone mute circuit between Connector Block and Micro Controller pins (AUMUTE and
OPTROW) has been introduced. For this feature the former security contact is used. In general this
is not a problem because the trend to use a security contact is decreasing by the use of detachable
fronts.
- For part 1c only, the bleep input is moved from the source selector (HEF4052B) input to the Audio
Pre Amplifier (TDA6320T) input.
Main Board part 2a and 2b (Page 17 and Page 18 ).
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