DOWNLOAD Panasonic Chassis / Euro-5VP Service Manual ↓ Size: 192.78 KB | Pages: 13 in PDF or view online for FREE

Model
Chassis Euro-5VP
Pages
13
Size
192.78 KB
Type
PDF
Document
Service Manual / Other
Brand
Device
TV / EURO-5VP
File
chassis-euro-5vp.pdf
Date

Panasonic Chassis / Euro-5VP Service Manual / Other ▷ View online

2
FORWARD
We would like to express our sincere gratitude for your outstanding efforts in selling and servicing
Panasonic Colour Televisions.  We are convinced that you have and will continue to make your best
efforts to improve your engineering techniques, and to obtain the highest results in your daily
servicing.
We are now introducing this "Technical Guide" to assist you and make your servicing tasks easier and
more rapid.
This Technical Manual focuses on an explanation of the new circuit technology employed in the
EURO-5VP Chassis used in our Video Projection System Television.  Please see the service
manuals for details concerning the circuits and adjustment methods.
The  EURO-5VP Chassis is for a video projector, and is based on the EURO5 Chassis.
   WARNING
T h i s   s e r v i c e   i n f o r m a t i o n   i s   d e s i g n e d   f o r   e x p e r i e n c e d   r e p a i r   t e c h n i c i a n s   o n l y   a n d   i s   n o t   d e s i g n e d   f o r   u s e   b y   t h e   g e n e r a l
p u b l i c .       I t   d o e s   n o t   c o n t a i n   w a r n i n g s   o r   c a u t i o n s   t o   a d v i s e   n o n - t e c h n i c a l   i n d i v i d u a l s   o f   p o t e n t i a l   d a n g e r s   i n   a t t e m p t i n g
t o   s e r v i c e   a   p r o d u c t .     P r o d u c t s   p o w e r e d   b y   e l e c t r i c i t y   s h o u l d   b e   s e r v i c e d   o r   r e p a i r e d   o n l y   b y   e x p e r i e n c e d   p r o f e s s i o n a l
t e c h n i c i a n s .       A n y   a t t e m p t   t o   s e r v i c e   o r   r e p a i r   t h e   p r o d u c t   o r   p r o d u c t s   d e a l t   w i t h   i n   t h i s   s e r v i c e   i n f o r m a t i o n   b y   a n y o n e
e l s e   c o u l d   r e s u l t   i n   s e r i o u s   i n j u r y   o r   d e a t h .
!
3
CONTENTS
1.
MICRO PROCESSOR U NIT ..............................................................................................4
2.
SINGLE ABL ....................................................................................................................5
3.
SHADING ........................................................................................................................6
4.
PREVENTION OF PRO JECTION TUBE BURN-OUT ........................................................6
5.
SINGLE COLOUR MODE .................................................................................................7
6.
PROTECTION ..................................................................................................................8
7.
DIGITAL CONVERGENCE ...............................................................................................9
4
1.  Micro Processor Unit
MPU(IC1101)  of EURO5-VP chassis uses same as
EURO5 chassis’s device(SDA5450C48-1).
The difference points are as below.
Pin No.
EURO5-VP
EURO5
69
SCL4
Not use
70
SDA4
Not use
76
Remote control Stop
50/100
Pin No. 69 & 70
These bus lines are used for optical circuit control of
projection TV. EURO5 chassis has 3 bus line, EURO5-VP
chassis is operated by 4 bus line.
Pin No. 76
During the digital convergence mode, digital convergence
circuit is operated by SUB MPU(IC7106).
During that time, Main MPU(IC1101) is stopped by Hi
voltage applies to pin No.76  of Main MPU.
IC7106
Sub MPU
IC7101
EEPROM
IC7103
RGB Cont.
IC7702
WB DAC
IC7707
Single
Colour
IC453
Deflection
Cont.
IC1101
MPU
69
70
76
IC7101
EEPROM
IC7101
EEPROM
IC7101
EEPROM
SDA4, SCL4
Remote control
Stop
5
2.  Single ABL
Purpose :
In a normal TV the ABL operation detects the current
following to the secondary coil of the flyback transformer
and controls the contrast. In a video projection TV,
however, the current for the secondary coil of the flyback
transfomer is measured as the total current for the three
projection tube. Therefore the current can not be controlled
even if most of the electron beams are sent though one
projection tube. For this reason the monochrome ABL
circuit detects the maximum current for each projection
tube and controls the same. We have added a circuit which
accelerates the ABL operation time, and lowers the
contrast.
Operation :
In normal ABL operation detects the current flowing to FBT
which supplies the high voltage to the three projection
tubes, as with a standard TV. This is alike EURO5 chassis.
The current flowing to each projection tube is detected in
the colour output transistor emitter, and the maximum
current to each projection tube is then input to the Q7735
through D3352,D3362 and D3372.
Then output value of Q7735 is input to pin No. 5,7,9 and 11
of IC7705, these are compared with pin No. 4,6,8 and 10 of
IC7705.
Compared result is output from pin No..1,2,13 and 14 as
P0, P1, P2 and P3. P0-P3 data are input to IC7702, then
CRT current following is separated to 5 levels/ Ranks in the
IC7702 as follows.
P0
P1
P2
P3
RANK
LEVEL
H
H
H
H
A
Danger
H
H
H
L
B
I
H
H
L
L
C
I
H
L
L
L
D
I
L
L
L
L
E
Safety
Detection data is input to MPU through IIC bus line and
MPU controls the contrast to keep detection level safety.
R,G,B  OUT
Q7735
D3352,D3362,D3372
CRT-Anode
FBT
Q9601
4
5
7
6
8
9
11
10
2
1
13
14
+5v
IC7705
M5234P
IC7702
CX1315P
10
9
2
1
14
15
69
70
IC1101
MPU
IC9601
VCJ
43
11
10
BCL
SDA
SCL
+
-
+
-
+
-
+
-
E10 A10
16
1
P3
P2
P1
P0
LG1 W3
8
IIC bus
Q3351
Q3361
Q3371
Page of 13
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  • Here you can View online or download the Service Manual / Other for the Panasonic Chassis / Euro-5VP in PDF for free, which will help you to disassemble, recover, fix and repair Panasonic Chassis / Euro-5VP TV. Information contained in Panasonic Chassis / Euro-5VP Service Manual / Other (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.