Symphonic WF24T5 Schematic
SUPPLEMENT
SERVICE MANUAL
This service manual shows only the differences between
the model WF24T5 and the original model 6424TF.
All other information is described in the service manual
of the model 6424TF.
23″ COLOR
TELEVISION
WF24T5
TABLE OF CONTENTS
Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Schematic Diagrams / CBA’s and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Different parts from the original model (6424TF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
BLOCK DIAGRAMS
R
Audio/Power Control Block Diagram
1
SPEAKER
CN801 CLN801
SP-GND 2
SP801
SPEAKE
(AUDIO AMP)
IC801A
LINE
6
AMP
1
34
ATT
TUNER
MUTE
/STANDBY
2
57
A-MUTE
TO POWER
SUPPLY BLOCK
+5V-CTRL228+5V-CTRL
+8V-CTRL
40
18
POWER MANAGE.
/MCU RESET
13
12
RESET
MAIN CBA
AUDIO SIGNAL
TV MICON/VIDEO
/AUDIO/CHROMA
/DEFLECTION
IC111
SDA
58
56
SCL SCL
SDA
TU-AUDIO
TO IF/VIDEO/SYSTEM
CONTROL BLOCK
25
JK702
(FRONT)
AUDIO-IN
27
1-1
31
AL+9V
L3410BLA
SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS
Standard Notes
Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often
pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement parts that have these special safety
characteristics are identified in this manual and its supplements; electrical components having such features are
identified by the mark “#” in the schematic diagram and the parts list. Before replacing any of these components,
read the parts list in this manual carefully. The use of substitute replacement parts that do not have the same
safety characteristics as specified in the parts list may create shock, fire, or other hazards.
Notes:
1. Do not use the part number shown on these drawings for ordering. The correct part number is shown in the
parts list, and may be slightly different or amended since these drawings were prepared.
2. All resistance values are indicated in ohms (K = 10
3. Resistor wattages are 1/4W or 1/6W unless otherwise specified.
4. All capacitance values are indicated in µF (P = 10
5. All voltages are DC voltages unless otherwise specified.
Note of Capacitors:
ML --- Mylar Cap. PP --- Metallized Film Cap. SC --- Semiconductor Cap. L --- Low Leakage type
Temperature Characteristics of Capacitors are noted with the following:
B --- ±10% CH --- 0±60 ppm/°C CSL --- +350~-1000 ppm/°C
3
, M = 106).
-6
µF).
Tolerance of Capacitors are noted with the following:
Z --- +80~-20%
Note of Resistors:
CEM --- Cement Res. MTL --- Metal Res. F --- Fuse Res.
Capacitors and transistors are represented by the following symbols.
CBA Symbols
(Top View) (Bottom View)
+
Electrolytic Capacitor
(Bottom View)
Transistor or Digital Transistor
E C B
(Top View)
NPN Transistor
E C B
(Top View)
(Top View)
PNP Transistor
E C B
(Top View)
Schematic Diagram Symbols
Digital Transistor
E C B
NPN Digital Transistor
PNP Digital Transistor
E C B
2-1 L15N_SC
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