Panasonic PV20DF25 - MONITOR/DVD COMBO, Service Manual

Page: 72 / 87

BEFORE REPLACING PARTS, READ THE FOLLOWING:
12.1. REPLACEMENT NOTES
12.1.1. General Notes
1. 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.
2. IMPORTANT SAFETY NOTICE
Components identified by the sign have special
characteristics important for safety. When replacing any of
these components, use only the specified parts.
3. SPECIAL NOTE
All integrated circuits and many other semiconductor
devices are electrostatically sensitive and therefore require
the special handling techniques described under the
"ELECTROSTATICALLY
SENSITIVE (ES) DEVICES"
section of this service manual.
4. Parts with no Ref. No. in "EXPLODED VIEWS" are not
supplied. And some Ref. No. will be skipped. Be sure to
make your orders of replacement parts according to the
parts list.
5. Parts different in shape or size may be used. However, only
interchangeable parts will be supplied as service
replacement parts.
6. Definition of Parts supplier:
a. Parts with mark "MKE" in the Remarks column are
supplied from MKE.
b. Parts with mark "MKI" in the Remarks column are
supplied from MKI.
c. Parts with mark "SPC" in the Remarks column are
supplied from Spare Parts Center of Panasonic AVC
Company.
d. Parts without mark in the Remarks column are supplied
from MKA.
7. Item numbers with capital letter E (Example: E10, E20, .....)
in the Ref. No. column are shown in the exploded views.
8. Parts whose Ref. Nos. are the same are interchangeable as
replacement parts. Any of these parts may be ordered and
used as a replacement part.
12.1.2. Mechanical Replacement Notes
1. Section No. of parts shown in Exploded Views are indicated
in the Remarks column.
2. The Infrared Remote Control Unit (Ref. No. 123)
replacement part is available as a complete assembly unit
only. Do not try to disassemble the Infrared Remote Control
Unit. However, the battery cover is available separately as
a replacement part.
3. When replacing the DVD Frame (Ref. No. 317), be sure to
place the Rating Label (Ref. No. 318) on it.
4. When replacing the DVD Mechanism Unit (Ref. No. 242),
be sure to place the Cabinet Label (Ref. No. 253) on it.
12.1.3. Electrical Replacement Notes
1. Unless otherwise specified;
All resistors are in
Ω
, K = 1,000
Ω
, M = 1,000 k
Ω
.
2. Abbreviation
RTL: Retention Time Limited
This indicates that the retention time is
limited for this item. After the
discontinuation of this item in
production, it will no longer be
available.
NR: Non Repairable Board Ass´y
MGF CHIP: Metal Glaze Film Chip
C CHIP: Ceramic Chip
COMPLX CMP: Complex Component
W FLMPRF: Wirewound Flameproof
C.B.A.: Circuit Board Assembly
P.C.B.: Printed Circuit Board
E.S.D.: Electrostatically Sensitive Devices
3. SERVICE OF CHIP PARTS
When servicing chip parts, please use a soldering iron of
less than 30 W.
4. When replacing 0
Ω
resistor, a wire can be substituted for
it.
5. Since the UHF/VHF TUNER/TV DEMODULATOR UNIT
(Ref. No. 743) has already been pre-adjusted at the factory,
do
not try to adjust the UHF/VHF TUNER/TV
DEMODULATOR UNIT. The UHF/VHF TUNER/TV
DEMODULATOR UNIT replacement part is available as a
complete assembly unit only.
6. EEP ROM IC (IC6004) replacement note:
There are 2 types of EEPROM IC (IC6004) used on the
Main C.B.A. (DIP TYPE and SOP TYPE). However, these
are same reliability, please refer to "MAIN C.B.A." in
CIRCUIT BOARD LAYOUT.
12 REPLACEMENT PARTS LISTS
72
PV-20DF25 / PV-27DF25 / PV-27DF5 / PV-20DF25-K / PV-27DF25- K