THOMSON VP2750, VP4780, VR8027, VR8047, VK231PS Technical Manual
...
R6000 CAT. 1 CHASSIS
VIDEO RECORDERS
19, AVENUE DUBONNET - B.P.25
92403 COURBEVOIE CEDEX
TEL.(1) 46 91 36 00 -
TELEX : 610 081 F - TELECOPIE : (1) 46 91 01 80
Code : 350 543 90 - 1295/00 M - 000 000 - Imp.
Tous droits de reproduction, de traduction, d'adaptation Les descriptions et caractéristiques figurant sur ce document sont données à titre d'information
et d'exécution réservés pour tous les pays. et non d'engagement. En effet, soucieux de la qualité de nos produits, nous nous réservons
le droit d'effectuer, sans préavis, toute modification ou amélioration.
S.A. AU CAPITAL DE 200 000 000 F
SIEGE SOCIAL : 9, Place des Vosges - La Défense 5
92400 COURBEVOIE
RCS NANTERRE B 322 019 464
TECHNICAL GUIDE
R6000 MONO
CHASSIS VIDEO
RECORDERS
TECHNICAL GUIDE
Centre de formation
46 Quai Alphonse Le Gallo
92648 BOULOGNE CEDEX
Tél :0141865000
N° de déclaration d'existence :
1 1 92 052 87 92
Tous droits de reproduction, de traduction, d'adaptation Les descriptions et caractéristiques figurant sur ce document sont données à titre d'information
et d'exécution réservés pour tous les pays. et non d'engagement. En effet, soucieux de la qualité de nos produits, nous nous réservons
le droit d'effectuer, sans préavis, toute modification ou amélioration.
Siège Social
46 Quai Alphonse Le Gallo
92648 BOULOGNE CEDEX
S.A. au capital de 200.000.000 francs
R.C.S Nanterre B 322 019 464
Code :000000000 - 01/97 M - 000 000 - Imp.
R6000
CAT. 1
CHASSIS VIDEO
RECORDERS
1
CONTENTS
INTRODUCTION 3
SETUP MORE 11
POWER SUPPLY 17
MECANISM 31
SERVO CONTROL 37
PROGRAMMIG OSD 51
SERVO CONTROL 61
SWITCHING 79
VIDEO PROCESSING 85
2
3
INTRODUCTION
4
5
The chassis and commercial model numbers of 6000 Series video recorders are as follows:
CHASSIS MODEL NO.
R6015CE
R6045CE
R6048CE
R6414CE
R6444CE
R6704PS
R6744PS
COMMERCIAL MODEL
VP2750
VP4750
VP4780
VR8027
VR8047
VK231PS
VK431PS
THOMSON
SABA
BRANDT
EXPLANA TION OF CHASSIS MODEL NUMBERS
R: Video recorder
First digit: Series to which device belongs (in this
case, 6 = 6000 Series)
Second digit: Brand of device
0: Thomson
4: Saba
7: Brandt
Third digit: Product type
0: Two video heads, basic
1: Two video heads
4: Four video heads
Fourth digit:
4/5: ShowView
8: ShowView, Jog Shuttle
CE: Central Europe (BG, DK, L)
PS: PAL/SECAM
BRAND
6
NO
NO
YES
CHARACTERISTICS
NUMBER OF VIDEO HEADS
H. Q.
CASSETTE TIME AND "TAPE
REMAINING" COUNTER
REAL-TIME TAPE
COUNTER
DIRECT ACCESS
INDEX: MARKING/SEARCH
FWD/REW VISUAL SEARCH
5 speeds
IMAGE PAUSE, FRAME-BY-FRAME,
SLOW MOTION
OPEN-ENDED
RECORD/PLAY
AUTOMATIC AV
RECORDING
COLLISION MESSAGE
PICTURE PEAK ADJUSTMENT
SATELLITE RECEIVER CONTROL
PLAY NTSC ON PAL TV
Automatic channel name memory
VP2750
VR8027
VK231
VP4750
VR8047
VK431
2
YES
WH. C/DE/YNR
YES
NO
YES
NO
NO
NO
YES
NO
4
WH. C/DE/YNR
YES
YES
NO
NO
YES
YESYES
NO
YES
NO
NO
NO
YES
NO
LONG PLAY NO YES
VP4780
4
WH. C/DE/YNR
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
7
CHARACTERISTICS
UHF MODULATOR
VK231
VK431
VR8027
VR8047
VP2750
VP4750
VP4780
L
51 through 67
L ,G, K
51 through 67
L ,G , K
51 through 67
WIDE BAND TUNER YES YES
YES
CHANNEL SEARCH
SYNTH. FREQ.
99 PRG.
SYNTH. FREQ.
99 PRG.
SYNTH. FREQ.
99 PRG.
STANDARDS LL’BG LL’BGDKK’ LL’BGDKK’
COLOUR STANDARD
PAL SECAM
MESECAM
PAL SECAM
MESECAM
PAL SECAM
MESECAM
AUTO CHANNEL MEMORY
YES YES YES
CHANNEL CLASSIFICATION NO YES YES
OSD ON TV YES YES YES
AUTO TIME SET NO YES YES
PROGRAMMING 8 progs. over 1 year 8 progs. over 1 year 8 progs. over 1 year
VPS / PDC NO YES YES
SHOWVIEW YES YES YES
VIDEO CAMERA SYNCHRO MOUNTING NO NO YES
MAINS POWER CUT BACKUP 30 mn 30 mn 30 mn
FRONT PANEL AV CONNECTORS NO NO YES
TV Universal REMOTE CONTROL UNIT NO NO YES
A/B CODE NO NO YES
8
9
LANGUAGE SELECTION
Press and hold the EXIT/STATUS key on the remote control unit for a few seconds. "French"
and "English" are displayed in turn. Release the key to make your selection.
UHF MODULATOR CHANNEL ADJUSTMENT
Connect the antenna cable to the antenna system.
Press and hold the A menu key until SYS appears on the video recorder display.
Use the AV key to select the system.
SYS 1 France (L standard)
SYS 2 Western Europe (BG standard)
SYS 3 Eastern Europe (DK standard)
Press <A> to continue.
After a few seconds, the video recorder shows the channel number. You can change it using
the + and - keys on the remote control.
OPERATING TIME
Press and hold the 0000 or ERASE key on the remote control for ten seconds. A menu
appears on the screen, and shows the number of hours of operating time in Play Mode and
Record Mode.
10
11
SETUP MODE
AND
SELF DIAGNOSIS
12
Com. Ref.
VP2750
VP4750
VP4780
VR8027
VR8047
VK231PS
VK431PS
1
0
0
0
0
0
0
0
3
1
1
2
1
1
0
0
4
0
0
0
0
0
0
0
5
8
8
8
8
8
8
8
6
4
E
E
4
E
4
E
7
4
4
4
0
0
0
0
8
4
4
5
4
4
4
4
9
B
B
B
B
B
4
4
10
0
0
0
0
0
0
0
11
9
9
B
9
9
1
1
12
1
1
3
1
1
1
1
13
0
8
A
0
8
0
8
14
3
3
3
3
3
B
B
Model
R6015CE
R6045CE
R6048CE
R6414CE
R6444CE
R6704PS
R6744PS
2
2
2
2
2
2
1
1
TABLE OF R6000 SETUP MODE CODES
13
SETUP MODE
GENERAL RESET
- Disconnect the video recorder from the power supply.
- Press <P+> and <P-> on the keypad. For a machine without these keys, press
<Stop>, <Play>, and <Standby> on the keypad.
- Reconnect the video recorder to the power supply, and release the keys.
The Setup consists of 14 digits corresponding to the Setup mode values.
In Setup mode, certain values can be entered according to the characteristics of the device
(see summary table).
DATA ENTRY
The digit to be confirmed flashes on screen. Use the number keys on the remote control to
make entries or changes.
Press <2> to go to the next digit. Press another number key to change the value from 0 to F.
Note: Before storing the parameters in memory, it is essential to go back to the first digit.
MEMORY
Press <Stop> on the remote control or keypad.
You can quit the menu without entering anything in the memory by pressing <Exit> or <Off>.
SETUP
0 2 1 0 8 4 4 4 B 0 9 1 0 3
STOP
store
14
Digit Number Meaning Value
1 and 2 Function requested and position 1 - Fast FWD or REW
of mechanism at the time of the 2 - Stop
incident 3 - Stanby
3 - Play
4 - Reverse play
5 - Load/Unload
6 - Arrêt (unload at limit stop)
7 - Eject.
F - Initialisation
3 and 4 Function performed by the 00 - Stop
microprocessor (Servo control/ 01 - Fast rewind
Automatic control) 02 - Fast forward
04 - Play
11 - Reverse play
12 - Search/Play
44 - Record
84 - Image pause
C4 - Record pause
40 - Record/Record pause
10 - Search
5,6,7 and 8 Function in progress before error bit 0
Normal 0 0 0 0
Record 0 0 0 1
FRAME-BY-FRAME 0 0 0 4
Stop (unload at limit stop) 0 0 0 8
Eject. 0 0 1 0
Stop 0 0 2 0
Capstan lock 0 0 4 0
Initialisation 0 0 8 0
Record loop 0 2 0 0
Play loop 0 4 0 0
Record or play loop 0 8 0 0
Fast FWD or REW 1 0 0 0
Search 2 0 0 0
Image pause 4 0 0 0
Play 8 0 0 0
9 and 10 Error message 81 - Drum
82 - Left reel stand
84 - Right reel stand
88 - Function incomplete
15
SELF DIAGNOSIS
STOP
EXIT
clear number
exit
00 00 00 00 00
SELF DIAGNOSIS
When a mechanical incident occurs, or following an operator error, a 10-digit number
representing the error is stored in the EEPROM. This number can be displayed on screen so
that the problem can be investigated and solved.
ERROR MESSAGE DISPLAY
There are two ways to do this:
Via Setup mode, when the Service Setup page is displayed on screen, press the Fast
Forward key on the remote control.
In Stop or Standby Mode, when nothing is displayed on the television screen, press
<ERASE/0000> for at least ten seconds.
Use the table opposite to interpret the message.
ERASE THE TEN DIGITS OF THE ERROR MESSAGE
Press <Stop> on the remote control.
EXIT SETUP MODE WITHOUT STORING IN MEMORY
Press <Exit> on the remote control.
SERVICE COUNTER
16
17
POWER SUPPLY
18
CP023
RP024
CP024
RP019 DP019
RP021
RP022
RP029
TP023
TP020
CP021
RP026
TP022
CP022
RP020
RP027
RP025
CP025
DP025
RP037
DP037/ 038
RP038
CP038
DP023
RP023
RP004/005/006
007/008/009
FP44
CP010
DP002
DP003
DP001
DP004
300V
4
6
5
8
3
9
1
RP028
7
RP012
DP012
DP041
DP040RP041 RP040
CP040
SECONDARY
REGULATION
IP 050
5 VE
14 VE
DP033
CPO31/ 032
DP034
DP031
RP033
RP034
RP011
DP005
DP044
DP020
LP050
3,9 V
33 V
22 V
6,8 V
19
GENERAL INFORMATION
Self-oscillating switching power supply called FROSIN (FRee Oscillating Safe INtelligent).
In operation, the switching frequency varies from 42 kHz to 45 kHz for a power of 17 W . In
Standby Mode, the switching frequency is close to 56 kHz for a power of 9 W . In Standby there
is a Power-Saving Mode, where the frequency is 23 kHz and consumption is 4.8 W .
CONDUCTION OF SWITCHING DEVICE TP20
The 300 V dc voltage, rectified and filtered by DP01 through DP04 and CP10, is used as a
source for start-up. It supplies the base current for TP20 via RP04/05/06/07/08/09/1 1,
CP23/RP24 and RP21.
The current induced in winding 4-6 of LP050 via DP19/RP19 maintains conduction in TP20.
CP24 accelerates the conduction of TP20.
While TP20 is conducting, CP23 is charged by winding 8-3 of LP050 via DP23 and RP23.
LOCKING OF SWITCHING DEVICE TP20
When the voltage at the terminals of RP20 is suf ficiently high, TP22 conducts, followed by
TP23. CP23 is then connected between the base and emitter of TP20, and leads to its
discharging and locking. A polarity reversal at the terminals of LP050 achieves the following:
- Improved discharging by CP24
- Recovery of the energy in the secondaries
- Putting into service of the regulation
- Charging of CP25 via DP25 (soft start circuit)
- Maintaining conduction of TP22/23 via DP37/38 and RP37 (FROSIN circuit)
- Maintaining the charging of CP023 by 7 of LP050, DP12, RP12, and 3 of LP050.
SOFT START
The negative voltage, rectified by DP25 and filtered by CP25, delays the instant of conduction
of TP22/23, and then the instant at which TP20 locks. At first, this negative voltage is 0. TP22
commands come from RP20. This negative voltage then appears and increases, and then
delays control of TP22/23. The conduction time of TP20 is therefore increasingly long.
20
CP023
RP024
CP024
RP019 DP019
RP021
RP022
RP029
TP023
TP020
CP021
RP026
TP022
CP022
RP020
RP027
RP025
CP025
DP025
RP037
DP037/ 038
RP038
CP038
DP023
RP023
RP004/005/006
007/008/009
FP44
CP010
DP002
DP003
DP001
DP004
300V
4
6
5
8
3
9
1
RP028
7
RP012
DP012
DP041
DP040RP041 RP040
CP040
SECONDARY
REGULATION
IP 050
5 VE
14 VE
DP033
CPO31/ 032
DP034
DP031
RP033
RP034
RP011
DP005
DP044
DP020
LP050
3,9 V
33 V
22 V
6,8 V
21
FROSIN CIRCUIT
During the energy restoration phase, Transistors TP22/23, maintained in their conduction
phase by Network 5 of LP050, DP37/38, and RP37, block TP20. At the end of
demagnetisation, the voltage induced on the collector of TP20 is reduced, and the charging of
CP21 triggers an oscillation cycle with the primary of LP050. Because of this, the collector
voltage of TP20 continues to fall when it reaches 300 V.
The new saturation control of TP20 becomes involved when the collector voltage of TP20 is
close to 0. This effect is obtained by placing a time delay on the action of the positive voltage
induced at 4 of LP050. This limits power losses due to the switching of TP20. The efficiency of
this power supply is therefore above 81% in operation (38% in Standby Mode).
This time delay is caused by the time taken to discharge TP22/23 (related to the FROSIN
circuit: DP37/38, RP37 by controlling the saturation current).
POWER SUPPLY BEHAVIOUR IN STAND-BY MODE
Because the secondaries require little energy in Stand-by Mode, the saturation time of TP20
tends to fall to 0.2 µs (frequency on the order of 200 kHz). This value is too low, and would
affect power supply efficiency in this mode. A minimum conduction time circuit (Ton min =
0.5 µs) for TP20 has therefore been added, using components CP38/RP38.
In steady state, regulation phototransistor IP050 cannot handle the saturation of TP22 and
TP23 (and then the blocking of TP20) alone. The following must assist:
• Positive voltage produced at RP20 terminals during the Storage Phase,
• Positive voltage supplied by the FROSIN circuit (DP37/38) in Restoration Phase.
In Standby Mode, the stored energy becomes greater than the small requirements of the
secondaries. Because of this, the secondary voltages, and in particular the 14 V, increase
during the energy restoration phases. The conduction time of TP20 is shortened to 3 µs by the
secondary regulation effect. This limits the energy stored in LP050.
Ton min is a result of the negative pulse obtained from the voltage induced in 5 of LP050
(negative when TP20 is conducting) and the charging of CP38 via RP38. This negative pulse
keeps TP22 blocked for a minimum of 0.5 µs.
22
CP023
RP024
CP024
RP019 DP019
RP021
RP022
RP029
TP023
TP020
CP021
RP026
TP022
CP022
RP020
RP027
RP025
CP025
DP025
RP037
DP037/ 038
RP038
CP038
CP071
CP041
DP023
RP023
RP004/005/006
007/008/009
FP44
CP051
DP051
DP056
CP057
CP056
DP061 CP061
CP010
DP002
DP003
DP001
DP004
300V
4
6
5
11
8
14
7
10
9
1
RP028
3
RP012
DP012
DP041
DP040RP041 RP040
CP040
DP033
CPO31/ 032
DP034
DP031
RP033
RP034
RP073
RP035
RP073
RP067
RP065
RP011
DP005
DP044
DP020
16
17
+ UH
- UH
RP056
+ 33 VE
18
CP054
DP053
RP053
- 30 VE
DP081/ 082
CP081/ 082
+ 36 VE
VM + 20VE
15
1
6
2
5
4
14VE
13
5VE
DP067
CP064
CP068
CP066
CP067
CP065
CP064
DP064
DP066
DP071
TP071
DP073
4V3
IP050
DP067
LP066
12
13,6 VEDM
13 VECM
13 VELM
RW085
DW086
DP054
DW010
CW004
RW005
- 5 VE
LP050
22V
6,8V
3,9V
33V
23
SECONDARY REGULATION
Transistor TP071 and optocoupler IP050 are used in conjunction for secondary regulation. The
current in the optocoupler diode is controlled by the regulation error voltage from the collector
of TP071. (This error voltage is obtained by comparing a reference voltage on the base of the
transistor and the 5VE image).
This current sets the value of the internal resistor in the optocoupler transistor. The switching
transistor is blocked according to the addition of the voltage obtained at the terminals of
Resistor RP020 and the voltage brought back by the internal resistor of the optocoupler
transistor. These two voltages polarise the base of TP022.
CP068 allows IP050 to handle abrupt variations of 14VE (motor start-up).
SECURITY
To avoid security problems, a new component called Protector Module (e.g. FP044) has
replaced classic fuses in several positions.
The advantage of the Protector Module is the ratio between its maximum current and the
current that destroys it. This ratio is 3, whereas the ratio is greater than 15 for a classic fuse.
In the event of an excessive increase in the conduction time of Transistor TP20 (overload of a
secondary), the voltage induced on winding 4-6 of LP050 during this phase increases and
charges Capacitor CP040. From a certain threshold, this will saturate TP022, block TP020,
and therefore shut off the power supply until CP040 discharges and allows TP022 to be
become blocked to re-start the power supply.
24
CP051
DP051
DP056
CP057
CP056
DP061 CP061
4
6
5
11
8
14
3
10
9
1
7
16
17
+ UH
- UH
RP056
+ 33 VE
18
CP054
DP053
RP053
- 32 VE
DP081/ 082
CP081/ 082
+ 36 VE
VM + 20VE
15
14 VE
13
5VE
DP067
CP064
CP066
CP067
CP065
CP064
DP064
DP066
LP066
12
DP054
DW010
CW004
RW005
- 5 VE
ON / OFF
FROM PIN
24 IR001
ECO
CP095
DP096
DP097
RP096
RP094
RP095
RP098
TP095
TP096
_____
25
ECO CIRCUIT
This circuit reduces consumption in Standby Mode from 9 W to 4.8 W by shutting off the display
and replacing it with a red LED on the front panel. Two transistors (TP095 and TP096) are
used to perform this function. In classic Standby Mode, these two transistors are blocked.
This function is enabled by Line 7 of the main menu, which supplies a Level 1 to Pin 24 of the
control microprocessor during the changeover to Standby Mode. This saturates the two
transistors.
The saturation of these transistors damps Transformer LP050, leading to a reduction in
frequency, to 23 kHz, and a reduction of the energy storage time. Because of this, all the
voltages fall, which limits consumption by eliminating the display.
Only the 5VE voltage remains at its nominal value because of the regulation.
26
CP051
DP051
DP056
CP057
CP056
DP061 CP061
11
14
10
16
17
+ UH
- UH
RP056
+ 33 VE
18
CP054
DP053
RP053
- 30 VE
DP081/ 082
CP081/ 082
+ 36 VE
VM + 20VE
15
14VE
13
5VE
DP067
CP064
CP066
CP067
CP065
LP064
DP064
DP066
LP066
12
13,6 VEDM
13 VECM
13 VELM
RW
085
DW086
DP054
DW010
CW004
RW005
- 5 VE
LP050
12 VS
5 VS
5 VS
TW 083
DT 067
TW001 -TW002
TW003 - DW006
( SERVO CONTROL)
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