Panasonic PV-L452 Service Manual page 259

1. Important safety notice
Components identified by the sign
characteristics important for safety. When replacing any
of these components. Use only the specified parts.
2. Do not use the part number shown on this drawing for
ordering.
The correct part number and part value is shown in the
parts list, and may be slightly different or amended since
this drawing was prepared.
3. Use only original replacement parts:
To maintain original function and reliability of repaired
units, use only original replacement parts which are listed
with their part numbers in the parts list section of the
service manual.
4. Parts different in shape or size may be used.
However, only interchangeable parts will be supplied as
service replacement parts.
5. Test point information
: Test point with no test pin.
Schematic Diagram Notes
1. Indication for Zener Voltage of Zener Diodes
The Zener Voltage of Zener Diodes are indicated as such
on Schematic Diagrams.
Example:
(6.2V)......Zener Voltage
2. How to identify Connectors
Each connector is labeled with a Connector No. and Pin
No. Indicating what it is connected to,
in other words, its counter part.
Use the interconnection schematic diagram to find the
connection between associated connectors.
Example:
The connections between C.B.A.s are shown below.
Ref. No. of the connection parts such as lead cable,
flexible cable which is supplied as a replacement parts.
The Number of pins of the Connector.
POWER SUPPLY
C.B.A.
P1503
244 (10 Pins)
Connector No. on Main C.B.A.
have special
MAIN C.B.A.
P3004
3. Parts marked "PT" are not used in any models included
in this service model.
C6011
100P
Example:
PT
4. The part number shown on this drawing is only main part
number, except for safety parts. Be sure to make your
orders of replacement parts according to the parts list.
5. Jumper wires are used for WA10, WA5 etc and these are
not supplied as replacement parts.
Signal Waveform Note
How to read Signal Waveform
6 V1 1.00Vp-p
PIN1 OF IC3001 REC
0.5V
20µs
3 4
1 2
WF5
5
Circuit Board Layout Note
Circuit Board Layout shows components installed for
various models.
For proper parts content for the model you are servicing,
please refer to the schematic diagram and parts list.
NOTE:
Circuit Board Layout includes components which are not
used.
Model No. Identification Mark
COMPARISON CHART
OF MODELS & MARKS
MODEL
PV-L452
PV-L652
Not Used
Note : Refer to item 3 of Schematic Diagram Notes for mark "PT".
C6014
R6097
PT
PT
1 Connecting Point
2 Volts/Div
3 Operation Mode of
VCR
4 Time/Div
5 Waveform Point on
Schematic
6 ∆V1:Peak to Peak
MARK
A
B
PT
PV-L452, PV-L652