Text preview for : 51878sch.pdf part of JVC AV21BT7 JVC color Television
Models: AV21BT7ENS / AV21BT7ENB
AV21BT7EPS / AV21BT7EPB
AV21BT7EES / AV21BT7EEB
Service Manual , part list and schematics
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AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
SCHEMATIC DIAGRAMS
COLOUR TELEVISION
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
CD-ROM No.SML200201
CONTENTS
NOTE ON USING CIRCUIT DIAGRAMS SEMICONDUCTOR SHAPES BLOCK DIAGRAM WAVEFORM DIAGRAM CIRCUIT DIAGRAMS PATTERN DIAGRAMS VOLTAGE TABLE 2-1 2-2 2-3 2-4 2-5 2-11 2-15
COPYRIGHT
2001 VICTOR COMPANY OF JAPAN, LTD.
No.51878 Dec. 2001
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
WAVEFORM DIAGRAM
MAIN PWB
STANDARD CIRCUIT DIAGRAM
IC050 6pin
0.7Vp-p(H)
Q802 D
8Vp-p(H)
IC401 6pin
1.7Vp-p(H)
IC050 17pin
1.4Vp-p(H)
NOTE ON USING CIRCUIT DIAGRAMS
1.SAFETY
The components identified by the symbol and shading are critical for safety. For continued safety replace safety critical components only with manufactures recommended parts. Type No indication MM PP MPP MF TF BP TAN (3)Coils No unit : Original setting position when shipped :DC 20k :H :V :Others (5)Voltage values /V 20µS/div 5mS/div Sweeping time is specified Others (4)Power Supply :B1 :9V Respective voltage values are indicated (5)Test point :Test point (6)Connecting method :Connector :Wrapping or soldering :Only test point display :B2 (12V) :5V :[ µ H] :As specified :Ceramic capacitor :Metalized mylar capacitor :Polypropylene capacitor :Metalized polypropylene capacitor :Metalized film capacitor :Thin film capacitor :Bipolar electrolytic capacitor :Tantalum capacitor
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES
The voltage and waveform values have been measured under the following conditions. (1)Input signal (2)Setting positions of each knob/button and variable resistor (3)Internal resistance of tester (4)Oscilloscope sweeping time : Colour bar signal
IC401 17pin
0.7Vp-p(H)
IC401 30pin
0.8Vp-p(H)
IC401 29pin
0.9Vp-p(H)
IC401 19pin
2Vp-p(H)
:All DC voltage values
Since the voltage values of signal circuit vary to some extent according to adjustments, use them as reference values.
IC401 20pin
2Vp-p(H)
IC401 21pin
2Vp-p(H)
IC401 40pin
1Vp-p(H)
Q605 5pin
450Vp-p(H)
3.INDICATION OF PARTS SYMBOL [EXAMPLE]
In the PW board :R1209 R209 (7)Ground symbol :LIVE side ground :ISOLATED(NEUTRAL) side ground :[ ] :[K ] :[M ] :EARTH ground :DIGITAL ground :Receptacle
4.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors Resistance value No unit K M
IC401 47pin
0.6Vp-p(V)
IC701 1pin
4.8Vp-p(V)
IC701 9pin
0.5Vp-p(V)
IC501 34pin
1.2Vp-p
Rated allowable power No indication :1/ 16 [W] Others Type No indication OMR MFR MPR UNFR FR (2)Capacitors Capacitance value :Carbon resistor :Oxide metal film resistor :Metal film resistor :Metal plate resistor :Uninflammable resistor :Fusible resistor :As specified
5.NOTE FOR REPAIRING SERVICE
This model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( ) side GND and the ISOLATED(NEUTRAL) : ( ) side GND.Therefore, care must be taken for the following points. (1)Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED(NEUTRAL) side GND simultaneously. If the above caution is not respected, an electric shock may be caused. Therefore, make sure that the power cord is surely removed from the receptacle when, for example, the chassis is pulled out. (2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or never measure with a measuring apparatus measure with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND at the same time. If the above precaution is not respected , a fuse or any parts will be broken. Since the circuit diagram is a standard one, the circuit and circuit constants may be subject to change for improvement without any notice. NOTE Due improvement in performance, some part numbers show in the circuit diagram may not agree with those indicated in the part list. When ordering parts, please use the numbers that appear in the Parts List.
Composition resistor 1/2 [W] is specified as 1/2S or Comp.
CRT SOCKET PWB
IC901 7pin
35Vp-p(H)
IC901 8pin
35Vp-p(H)
IC901 9pin
35Vp-p(H)
1 or higher less than 1 Withstand voltage No indication Others
:[pF] :[µF] :DC50[V] :DC withstand voltage [V]
AC indicated :AC withstand voltage [V] Electrolytic Capacitors 47/50[Example]:Capacitance value [µF]/withstand voltage[V]
2-4
No.51878
Dec. 2001 No. 51878
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
CONTENTS
SEMICONDUCTOR SHAPES BLOCK DIAGRAM WAVEFORM DIAGRAM CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM MULTISOUND PWB CIRCUIT DIAGRAM CRT SOCKET PWB CIRCUIT DIAGRAM HEADPHONE JACK PWB CIRCUIT DIAGRAM FRONT AV PWB CIRCUIT DIAGRAM
2-2 2-3 2-4
BLOCK DIAGRAM
2-5 2-7 2-9 2-9 2-10
PATTERN DIAGRAMS
MAIN, FRONT AV & HEAD PHONE JACK PWB PATTERN MULTISOUND & CRT SOCKET PWB PATTERN
2-11 2-13 2-15
VOLTAGE TABLE SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW FRONT VIEW TOP VIEW CHIP TR
C
E C B
E C B
B C E (G)(D)(S)
E C B
E C B
B
E
IC
BOTTOM VIEW FRONT VIEW TOP VIEW
1
N
OUT E IN
IN E OUT
1 N
1 N
CHIP IC
TOP VIEW
N N
1
N
1 N
N
2-2
No.51878
No.51878
2-3
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
MAIN PWB
VE-20073428(AV21BT7ENS/ENB) VE-20073414(AV21BT7EPS/EPB) VE-20073418(AV21BT7EES/EEB)
No.51878 2-5 2-6 No.51878
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
MULTISOUND PWB CIRCUIT DIAGRAM
MULTISOUND PWB VE-20078991(AV21BT7ENS/ENB, AV21BT7EES/EEB) VE-20079020(AV21BT7EPS/EPB)
No.51878 2-7 2-8 No.51878
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
CRT SOCKET PWB CIRCUIT DIAGRAM
CRT SOCKET PWB VE-20074437
FRONT AV PWB CIRCUIT DIAGRAM HEADPONE JACK PWB CIRCUIT DIAGRAM
HEADPHONE JACK PWB VE-20075217 FRONT AVPWB VE-20076582
No.51878
2-9
2-10
No.51878
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
PATTERN DIAGRAMS
MAIN PWB PATTERN
FRONT AV PWB PATTERN
FRONT
FRONT
HEADPHONE JACK PWB PATTERN
TOP
No.51878
2-11
2-12
No.51878
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
MUTTISOUND PWB PATTERN
CRT SOCKET PATTERN
TOP
TOP
No.51878
2-13
2-14
No.51878
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
VOLTAGE TABLE
MAIN PWB
IC050
PIN NO. 1 2 3 4 5 6 7 8 9 10
MULTI SOUND PWB
IC701 IC301
VOLTAGE 2.3 2.3 15 7.1 0 PIN NO. 6 7 8 9 VOLTAGE 44.5 7.5 0.3 7.1 PIN NO. 11 12 13 14 15 16 17 18 19 20 PIN NO. 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
VOLTAGE 2.8 4.5 2.8 4.5 2.9 3.1 0 2.9 7.8 3.9 VOLTAGE 0.1 3.6 0 0 2.4 2.8 4.5 4.5 6.6 0.1 3.6 7.8 3.8 0 3 0.1 3.6 3.6 3 3 3 3 3.6 3.6 3.6 0.1 0.1 2.7
VOLTAGE 3.7 0 4.0 4.0 2.1 4.0 2.7 4.0 0 2.8 VOLTAGE 2.4 2.3 0 0 0 2.5 2.5 4.7 7.8 2.9 4.9 0.1 0.1 3.4 3.9 0 3.4 2.4 2.4 4.5 4.5 2.0 3.7 3.8 4.2 2.6 3.0 3.3
PIN NO. 1 2 3 4 5
IC100
PIN NO. 1 2 3 4 5 VOLTAGE 0 12.7 0 0 -12.8 PIN NO. 6 7 8 9 VOLTAGE 0 12.8 0 0
Note) Although the symbol numbers of the level drive transistor and level output transistor are indicated as Q604 and Q606 on the wiring diagram, the numbers are indicated as Q601 and Q605 on the substrate, respectively. The following table shows the silk-printed symbol numbers on the substrate.
IC401
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
IC501
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 VOLTAGE 0.7 0 0 3.3 3.3 3.3 3.3 0 2.4 0 3.4 0.8 2.4 0 0.1 0 0 2.4 0.3 0.2 0 2.1 3.3 3.8 3.1 3.0 PIN NO. 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 VOLTAGE 0 0 0 3.3 3.3 3.3 3.3 0.5 0.5 0 2.4 0.2 0.2 0.2 0 2.4 0 3.3 0 3.4 3.4 3.4 3.4 3.4 3.4 3.4
Q055 Q100 Q501 Q512 Q514 Q515 Q516 Q517 Q518 Q601 Q605 Q701 Q702 Q802 Q805 Q806 Q807
E(D) 0.1 0 2.5 5.4 0 4.5 3.2 4.5 3.2 0 0 0 0 167 0 0 0
C(S) 7.8 12.7 0 3.4 4.8 3.2 4.5 3.2 4.5 0 --0 0 0 0 0 11.3
B(G) 0.1 0 2.5 4.8 0 2.3 2.4 2.4 2.4 0.1 0.1 0 0.6 0.1 0.6 0.6 0
Q809 Cathode:11.3V Anode:0V Control terminal:2.4V
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
VOLTAGE 2.5 0 0 4.9 0 0 4.9 0 4.5 4.5 2.4 2.4 2.4 0.1 0.1 0.1 0 4.8 0 0 0 0 0 4.9 0.1 0.1 0 0 0 0 0 0
PIN NO. 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
VOLTAGE 3.7 3.7 0 3.7 3.7 6.8 7.8 6.5 0 3.6 3.7 3.7 0 3.7 3.7 0 3.7 3.7 0 3.7 3.7 2.6 3.7 0 4.9 0.1 0.1 0.1 0 2.3 2.3 0
IC304
PIN NO. 1 2 3 4 VOLTAGE 2.4 2.4 2.4 0 PIN NO. 5 6 7 8 VOLTAGE 2.4 2.4 2.4 4.9
IC307
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 VOLTAGE 3.2 3.2 4.9 0 0.1 2.4 2.4 2.2 0 2.7 0 2.1 5.0 0 PIN NO. 15 16 17 18 19 20 21 22 23 24 25 26 27 28 VOLTAGE 0.1 0 4.3 3.0 3.5 3.3 3.3 3.3 3.5 4.5 0 3.4 0.1 0.1
IC801
PIN NO. 1 2 3
VOLTAGE 12.4 11.3 0
PIN NO. 4 5 6
VOLTAGE 2.6 11.9 0.1
IC502
PIN NO. 1 2 3 4 VOLTAGE 0 0 0 0 PIN NO. 5 6 7 8 VOLTAGE 3 3 3.4 3
IC802
PIN NO. 1 2 3 4 5 6 7 8 VOLTAGE 11.9 11.6 0.1 0 0.9 0.1 0.2 0.2 PIN NO. 9 10 11 12 13 14 15 16 VOLTAGE 0.9 2.6 2.4 0.1 3.1 2.5 2.5 2.5
Q301
E(D) C(S) B(G) 4.8 4.8 4.1
IC804
PIN NO. 1 2 3 VOLTAGE 3.4 2.1 12.4
IC805
PIN NO. 1 2 3 VOLTAGE 12.3 0 7.9
CRT SOCKET PWB
IC901
PIN NO. 1 2 3 4 5 VOLTAGE 3.2 2.9 3.2 0 6.0 PIN NO. 6 7 8 9 VOLTAGE 0.1 0.1 0.1 0.1
82 ,2 $
IC807
PIN NO. 1 2 3 VOLTAGE 9.9 0 5
No.51878
2-15
2-16
No.51878
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
VICTOR COMPANY OF JAPAN, LIMITED HOME AV NETWORK BUSINESS UNIT. 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan
Printed in Japan VP 0112 DP2070