Panasonic PV-M1348, Service Manual, Page: 2 / 130

MODEL MARK
PV-M1348 A
PV-M1358W B
VV1308 C
VV1318W D
PV-M1368 E
PV-M1378W F
Use Marks shown in the chart below to distinguish the
different models included in this Service Manual.
SAFETY PRECAUTIONS ................................................ 1-1
X-RADIATION .................................................................. 1-1
PREVENTION OF ESD TO ES DEVICES ....................... 1-2
OPERATION GUIDE ....................................................... 1-3
SERVICE NOTES ............................................................ 1-7
IC, Transistor and Chip Part Information .................... 1-21
DISASSEMBLY/ASSEMBLY PROCEDURES
Disassembly/Assembly
Procedures of Cabinet Parts ..................................... 2-1
Disassembly/Assembly
Procedures of Mechanism ........................................ 2-6
Disassembly/Assembly
Procedures of Cassette Up Ass'y ............................ 2-16
ADJUSTMENT PROCEDURES
Service Fixtures and Tools ......................................... 2-18
Mechanical Adjustment .............................................. 2-19
Electrical Adjustment .................................................. 2-25
Test Points and Control Location ............................... 2-35
SCHEMATIC DIAGRAMS AND CIRCUIT BOARD LAYOUT
Schematic Diagram
and Circuit Board Layout Notes ............................ 3-1
Schematic Diagrams .................................................. 3-2
Main I (Power Supply/System Control
/Servo) Schematic Diagram ...................................... 3-2
Main II (Signal Process/OSD
/Audio Amp) Schematic Diagram .............................. 3-4
Main III (TV Y/C Process) Schematic Diagram ............ 3-6
Main IV (Power Supply) Schematic Diagram ............... 3-8
Main V (Operation) Schematic Diagram ..................... 3-10
Capstan Stator/Junction/Loading Motor
/Audio Control Head Schematic Diagram ............... 3-14
TV Main/CRT Schematic Diagram ............................. 3-16
TV Stereo Schematic Diagram ................................... 3-18
Stereo Amp Schematic Diagram ................................ 3-20
Head Amp Schematic Diagram .................................. 3-22
Interconnection Schematic Diagram ........................... 3-26
Signal Waveform ........................................................ 3-27
Voltage Chart .............................................................. 3-31
CIRCUIT BOARD LAYOUT ......................................... 4-1
Main (Power Supply/Signal Process/OSD
/Audio Amp/TV Y/C Process/System Control
/Servo/Operation) C.B.A. (A,B,E,F,G,H,K) ................ 4-1
Main (Power Supply/Signal Process/OSD
/Audio Amp/TV Y/C Process/System Control
/Servo/Operation) C.B.A. (C,D,I,J) ............................ 4-5
TV Main C.B.A. ............................................................. 4-9
TV Stereo C.B.A. ........................................................ 4-11
Stereo Amp C.B.A. ..................................................... 4-11
CRT C.B.A. ................................................................. 4-12
Head Amp C.B.A. ....................................................... 4-13
Capstan Stator Unit .................................................... 4-15
Junction C.B.A. ........................................................... 4-15
Loading Motor P.C.B. ................................................. 4-16
Audio Control Head P.C.B. ......................................... 4-16
BLOCK DIAGRAMS
Power Supply Block Diagram ....................................... 5-1
Video Signal Path Block Diagram ................................. 5-2
Audio Signal Path Block Diagram ................................. 5-3
TV Stereo/Stereo Amp Block Diagram ......................... 5-5
System Control Block Diagram ..................................... 5-7
Servo Block Diagram .................................................... 5-8
TV Y/C Process/OSD/CCV
/TV Main Block Diagram ......................................... 5-10
EXPLODED VIEWS
1. Mechanism (Top) Section ......................................... 6-1
2. Mechanism (Bottom) Section ................................... 6-2
3. Cassette Up Compartment Section .......................... 6-3
4. Chassis Frame Section (1) ....................................... 6-4
5. Chassis Frame Section (2) ....................................... 6-5
6. Packing Parts
and Accessories Section ........................................... 6-6
REPLACEMENT PARTS LISTS
Before Replacing Parts, Read the Following ................ 7-1
Mechanical Replacement Parts List ............................. 7-2
Electrical Replacement Parts List ................................. 7-4
TABLE OF CONTENTS
MODEL MARK
PV-M2038 G
PV-M2048 H
VV2008 I
VV2018W J
PV-M2058 K
NOT USED Z
!
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
repair the product or products dealt with in this service information by anyone else could result in serious injury or death.