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8. Alignments
Not applicable.
9. Circuit Descriptions, List of Abbreviations, and IC Data
Index of this chapter:
1. Introduction
2. Power Supply
3. Loader/Mono Board
4. Mother Board
5. Abbreviations
6. IC Data
Notes:
•
Figures can deviate slightly from the actual situation, due
to different set executions.
•
For a good understanding of the following circuit
descriptions, please use the diagrams in chapter 6 and 7.
9.1
Introduction
The DVD6xx range (620, 623, and 633) is a fourth generation
DVD players. Some of their features are:
•
MP3 playback.
•
3D Sound.
•
Auto power off (after 15 min.).
•
Build in MPEG2, MP3, and AC-3 decoder.
•
CD-R(W) compatible.
•
DVD+R(W) compatible.
•
RGB video output on SCART.
Panel Overview
3p cinch
CVBS | Left | RIGHT
VFM2002 Sub-lead
VFM2002
MOTHERBOARD
Sub-lead PSU
* Europe Version *
(220V ~ 240V)
(AV & Front Display)
8p cable
4p cable
2p cable
FRONT STDBY
(1 x Tact Switch)
Figure 9-1
The DVD620 uses the new SD4.0 loader module. It also has a
new mother board (one panel for audio, video, and display) and
a dedicated power supply (based on the Step2001 type).
This SD4.0 mono board has the same service (ComPair)
connector as in previous versions.
Flashing of the application-SW is not possible via the ComPair
cable, only with a CD-R disc.
For sets with mask-ROM software, replace it with a
programmed Flash (available via your Philips Service
organisation).
Digital
SCART
Coaxial
30p FFC
SD4.00
MONOBOARD
&
MERCURY III Loader
4p cable
IR
FTD
FRONT CTRL
(3 x Tact Switch)
CL 16532162_055.pdf
Alignments
9.2
Power Supply
9.2.1
Introduction
The supply is a Switching Mode Power Supply (SMPS), which
uses the control IC TY720xx to produce pulses to drive the
power 'switch' (MOSFET). The TY720xx (item 7130) is a high
performance, current mode controller for DC-to-DC converter
applications.
The operation frequency varies with the circuit load. When the
output power demand decreases, the switching frequency
raises, with a maximum frequency of 125 kHz (determined by
C2107 at pin 5). At this point, the internal VCO takes over and
starts to decrease the switching frequency.
This has some benefits compared to a 'fixed frequency' flyback
converter. The efficiency is better, which results in a lower
power consumption.
9.2.2
Output Voltages
PSU Connection
(220V ~ 240V)
The following voltages are connected to the motherboard via
connectors 1400 and 1410:
•
+12VSTBY, 470 mA.
210102
•
+5VSTBY, 400 mA.
•
+3V3STBY, 1200 mA.
•
-8V, 30 mA.
•
-32V, 16 mA.
The +12VSTBY, on pin 2 of connector 1410, is further divided
into the following voltage:
•
+5V_DAC (via voltage regulator 7423), supply to audio
DAC, and OpAmp filter.
The +5VSTBY, on pin 6 of connector 1400, is further divided
into the following voltages:
•
+5V, supply to SD4.0 mono board.
•
+5VM, supply for analogue circuitry.
The suffix 'STBY', indicates that the supply is not switched 'off'
during Standby Mode. Power switching is done on the
motherboard with the STBY_CTRL signal from the slave
processor.
DVD 620 /0X1
1
2
3
4
5
6
EPM PSU
7
8
1
2
3
4
MOTHERBOARD
Figure 9-2
8.
EN 53
+3V3STDBY
+3V3STDBY
GND
+12VSTDBY
GND
+5VSTDBY
GND
-8VSTDBY
+5VSTDBY
+5VSTDBY
GND
+12VSTDBY
GND
+12V
-32V
-32V
CL 16532162_056.pdf
210102
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