JVC AV-21L41/BK, AV-21L41 Service Manual

No. 51859
Oct. 2001
A
V-21L41
1
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
/BK
CONTENTS
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SPECIFICATIONS
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SAFETY PRECAUTIONS
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FEATURES
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FUNCTIONS
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SPECIFIC SERVICE INSTRUCTIONS
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SERVICE ADJUSTMENTS
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PARTS LIST
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OPERATING INSTRUCTIONS
STANDARD CIRCUIT DIAGRAM
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2-1
SER VICE MANUAL
COLOUR FLAT TELEVISION
BASIC CHASSIS
CG
-F
No. 51859
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2
SPECIFICATIONS
ITEM
CONTENT
Dimensions(W×H×D)
598mm×468mm×471.5mm
Mass
24kg
TV RF System
B/G, I, D/K
RF Mode PAL / SECAM
Colour System
VIDEO Mode
PAL / SECAM / NTSC3.58 / NTSC4.43
Sound System
A
2
(Bilingual) system
Receiving Frequency
VHF (VL) 46.25MHz~168.25MHz VHF (VH) 175.25MHz~463.25MHz UHF 471.25MHz~863.25MHz CATV
Cable TVs of Mid (X-Z, S1 -S10 )Super (S11-S20) & Hyper (S21-S41) band s receivable
VIF Carrier 38.0MHz
Intermediate Frequency
SIF Carrier
32.5MHz(5.5MHz)/33.5MHz (4.5MHz )
31.5MHz (6.5MHz)
Colour Sub Carrier Frequency
PAL (4.43MHz), SECAM (4.40625MHz / 4.25MHz) NTSC (3.58MHz / 4.43MHz)
AC110~240V, 50 / 60Hz
Power Input
Rated Voltage Operating Voltage
AC90~260V, 50 / 60Hz
Power Consumption
105W (Max) 68W(Avg)
Picture Tube
Visible size: 51cm measured diag onally
High Voltage
26.5kV±1.5kV(at zero b eam current)
Speaker
5cm×12 cm, Oval ty p e×2
Audio Output
5W (monaural,Bilingual)
Aerial Input Terminal
75Ω Unbalanced
Input
Video 1V(p-p), 75Ω (Front / Rear) Audio 500mV(rms) (-4dBs), High impedance, (Front / Rear)
Output
Video 1V(p-p), 75Ω(Rear) Audio 500mV(rms) (-4dBs), Low impedance ,(Re ar)
Headphone jack
3.5mm min i jack
Remote Control Unit
RM-C365GY (Battery size : AA / R06 / UM-3×2)
Design and specifications ar e s ubjec t to change without notic e.
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FEATURES
"
New chassis d esi gn enables us e of an int eractive on- s c r een contr ol.
"
Wide range voltage (110V~240V) AC p ow er in put.
"
With AUDIO / VIDEO INPUT & OUTPUT terminal.
"
MUTING button can reduce the audio level to zero instantly.
"
Functional remote control to operate TV set (for channel select, volume control, power ON/OFF, etc.) from a distance.
"
I
2
C bus control utilizes single chip ICs for IF, V/C, DEF. VSM PRESET, PRESET & TURBO TIMER.
"
By means of AUTO PROGRAM, the TV stations can be selected automatically and the TV channels can also be rearranged automatically.
"
The sound system has a built-in A
2
bilingual system
"
Built-in AI ECO (ECONOMY, ECOLOGY) sensor.
In accord ance with t he bright ness in a room , the brig htness and / of contrast of the pictur e can be ad justed aut omatically t o make t he optimu m pic tu re which is easy on the eye.
"
Built – in ON TIMER, RETURN + & CHILD LOCK.
SYSTEM BLOCK DIAGRAM
IC301
VIDEO/CHROMA
DECORDER
IC702
MEMORY
TU001
TUNER
IC701
MICRO
COMPUTER
SCL1/SDA1
SCL2/SDA2
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FUNCTIONS
FRONT PANEL
REAR TERMINAL
ANT Terminal
VIDEO INPUT Terminal
VIDEO OUTPUT Terminal
AUDIO INPUT Terminal
AUDIO OUT PUT Terminal
MENU buttons
CHANNEL -/+ buttons
VOLUME -/+(/EXT) buttons
ECO sensor
REMOTE CONTROL sensor
ON TIMER lamp
POWER lamp
MAIN POWER button
A/V INPUT terminal
HEADPHONE jack
1
8
2 3
4
5
6 7
9
10
1
2 4
5
3
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REMOTE CONTROL UNIT(RM-C365)
ECO SENSOR key
SOUND SYSTEM key
COLOUR SYSTEM key
TV/VIDEO key
OFF TIMER key
CHANNEL SCAN key
RETURN key
DISPLAY key
CHANNEL-/+ key
POWER key
PICTURE MODE key
Number (CH.) key
⑬ -/--
key
MUTING key
MENU key MENU ▲/▼ key MENU -/+ key
VOLUME-/+ key
⑰ Ⅰ/Ⅱ
key
+
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REPLACEMENT OF MEMORY ICs
1. MEMORY ICs
This model uses mem ory ICs. This m em ory IC data ar e f or pr op er operati on of t h e vid eo an d d ef l ec ti on cir cuits. When replaci n g mem ory ICs , be su r e to us e ICs writ t en with the ini ti al v alues of d ata.
2. PROCEDURE FOR REPLACING MEMORY ICs
(1) Power off
Switch th e p ower off and disc onn ec t th e pow er pl ug f r om the w al l outlet.
(2) Replace ICs
Be sure to use memory ICs written with the initial data values.
(3) Power on
Connect th e power plug into the wall ou tlet and swi tc h t h e power on.
(4) Check and set SYSTEM CONSTANT SET
・・・・
It must not adjust without adjustment signals.
1) Press the
DISPLAY
key and the
PICTURE MODE
key of the REMOTE
CONTROL UNIT simultaneously.
2) T he SERVICE MEN U screen of Fig . 1 wil l b e displayed.
3) W hile the S ERVIC E MENU is dis pl ayed, ag ain pr ess the
DISPLAY
key an d
PICTURE MODE
key si multaneous ly, and th e SYSTEM CONSTAN T SET
screen of Fi g. 2 wi ll b e dis played.
4) Ch eck the set ti ng values of th e SYST EM C O N S T A NT SET of Table 1 If th e value is dif ferent, s elect the s etting it em with the
MENU
▼/▲key, and set
the correct value with the
MENU
- / + key.
5) Press the
DISPLAY
key twice, and return to the normal screen.
(5) R ec eiv e channel of setting
Refer to the
OPERATING INSTRUCTIONS
and set the receive channels
(channels preset) as described
(6) User Setting
Check th e user sett ing val ue of T able 2, and if setting valu e is diff erent, s et the correct value. For setting, refer to the
OPERATING INSTRUCTIONS
.
(7) Setting of SERVICE MENU
Verify t he s etti ng it ems of the S ER VICE ME NU of T abl e 3, and r eset wher e necessary. For setting, refer to the
SERVICE ADJUSTMENTS
.
NOTE
Both
MENU -/+ Key and MENU
/ key have the same functions.
SERVICE MENU
1.IF 2.V/C
3.DEF 4.VSM PRESET
5.PRESET
6.TURBO TIMER O FF
1-6 SELECT DISP : EXIT
******
************
***********
**********
***** **
****
**.***
******
***
*** ** **
*** ** ***** ** **
*** ** **** ***
** ***** ***
** ***
Fig.1
Fig.2
SYSTEM CONSTANT-
ⅠⅠⅠⅠ
COLOUR
COLOURCOLOUR
COLOUR :
: :
: *****
**********
*****
BILINGUAL
BILINGUALBILINGUAL
BILINGUAL : ***
: ***: ***
: ***
TUNER
TUNERTUNER
TUNER :
: :
: **
****
**
ECO SENSOR
ECO SENSORECO SENSOR
ECO SENSOR : YES
: YES: YES
: YES
LANGUAGE
LANGUAGELANGUAGE
LANGUAGE : E/R/A/F
: E/R/A/F: E/R/A/F
: E/R/A/F
: SELECT : OPERATE DISP : EXIT
SYSTEM CONSTANT SET 1
SYSTEM CONSTANT-
ⅡⅡⅡⅡ
B/B SOUND : NO LOCK : 20 COLOUR AUTO : YES QSS : MQSS ALC : NO TEXT RATE : 20
SYSTEM CONSTANT SET 2
:SEL :OPE
DISP:EXIT
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
MENU
▼/▲
key
MENU
-/+
key
DISPLAY ke y
PICTURE
MODE key
NUMBERS
key
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SETTING OF SYSTEM CONSTANT SET
Setting item Setting contents Setting value
COLOUR
TRIPLE
BILINGUAL
YES
TUNER
MU
ECO SENSOR
YES
LANGUAGE
E/T
B/B SOUND
NO
LOCK
YES 10 20
230 240 250
20
COLOUR AUTO
NO
QSS
MINT
ALC
NO
TEXT RATE
10 20 40 80 20
Table 1
USER SETTING VALUES
Setting item Setting value Setting item Setting value
MAIN POWER SW OFF PICTURE MODE (VSM) BRIGHT
SUB POWER ON LANGUAGE THAI
CHANNEL POSITION 1 POSITION CHANNEL PRESET Refer to OPERATING INSTRUCTION
VOLUME
About 10 ECO SENSOR OFF
TV/VIDEO
TV VNR OFF
ON SCREEN DISPLAY POSI TION INDICATION AUTO SHUTOFF OFF
COLOUR SYSTEM PAL ON TIMER PR1 0:00
SOUND SYSTEM B / G BLUE BACK OFF
OFF TIMER OFF ( shown : 00 ) CHILD LOCK OFF
BILINGUAL
ⅠⅠⅠⅠ(ⅠⅠⅠⅠ/ⅡⅡⅡⅡ
)
Table 2
MULTI
PAL
TRIPLE
YES NO
MU
MA
YES NO
E/T E
ON
OFF
YES
NO
MINT
MQSS
YES
NO
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INITIAL SETTING VALUE OF SERVICE MENU
1. Adjustment of the SERVICE MENU is made on the basis of the initial setting values ; however, the new setting values which set the screen in its optimum condition may differ from the initial setting.
2. Do not change the initial Setting Values of the Setting (Adjustment) items not listed In “ADJUSTMENT”.
2. V/C Initial settin g value
Colour system
Setting item
Variable
range
PAL SECAM NTSC 3.58 NTSC 4.43
RED GREEN
1. CUT OFF BLUE
-128~+127
-50
RED
2. DRIVE BLUE
-128~+127
+ 0
3. BRIGHT
-127~+127
+ 0
4. CONT.
-63~+63
+ 0
5. COLOUR
-63~+63
+ 0
+ 0
TV
+ 0 + 0 MU
6. TINT
VIDEO
-63~+63 + 8
+ 0
7. SECAM BL ADJ.
-31~+31
+ 0
TV
- 7(Fixed)
8. SHARP
(Do Not Adj.)
VIDEO
-32~+31
+15(Fixed)
9. AMP T.SHARP
-12
3. DEFLECTION Initial settin g value
Setting item Variable range
fv : 50Hz MODE fv : 60Hz MODE
1. VER. POSITION
-04 ~ +03
- 1 - 3
2. HOR. POSITION
-16 ~ +15
+ 3 + 3
3. VER. HEIGHT
-64 ~ +63
-35 + 1
4. VER. LINEARITY
-32 ~ +31
+15 - 1
5. VER. SCURVE
-32 ~ +31
-32 + 0
6. HOR. VCO ADJUST
-63 ~ +62
+ 0 + 0
4. VSM PRESET
VSM preset
VSM mode
Setting item
BRIGHT STANDARD SOFT
TINT
SETTING VALUE +15
COLOUR
SETTING VALUE +15
BRIGHT
SETTING VALUE +15
CONT.
SETTING VALUE +30 +19 +14
SHARP
SETTING VALUE +20 +15
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5. PRESET The items in the following table, it is no requirement for adjustment.
If values had changed by the miss operation, set the initial setting values in the following table.
Colour System (Do Not Adjust)
Initial setting value (Fixed value)
Setting item
PAL SECAM NTSC 3.58 NTSC 4.43
1. C TRAP FIX
111 1
2. SHARP PEAK
000 0
3. ABL
111 1
4. GAMMA
000 0
TV
022 3
5. Y. DELAY TIME VIDEO
020 2
6. BLACK EXP START
3
3
3
3
TV
110 0
7. C-BPF VIDEO
111 1
8. CW / SCP
000 0
9. VIF DET LEVEL
000 0
11. IF AGC M IN
000 0
12. VIF AGC
000 0
13. VIF PMOD
000 0
19. VNR
15 15 15 15
20. RGB LIM
111 1
21. RGB LIMIT LEVEL
222 2
23. TEXT H. POSITION
-3 -3 -3 -3
24. READ DATA
Sound System ( Do Not A djust)
Setting item B/G I D/K M
10. SIF DET LEVEL
0
0
0
0
14. SIF BPF BW ADJUST
0 (-) 0 (-) 0 (-) 0 (-)
15. SIF TRAP FO ADJUST
0 (-) 0 (-) 0 (-) 0 (-)
16. SIF TRAP FO ADJUST 2
0 (-) 0 (-) 0 (-) 0 (-)
17. SIF -TR AP
000 0
18. SIF -BPF
000 1
22. SIF SW
111 0
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REPLACEMENT OF IC301 (IF V/C DECODER)
"
For the IC3 01(IF V/C DEC ODER) of this model , all data are wr itten in t he micro-c omputer . So, write t he data in the micro-
computer in ac cor d an ce w i th t he fol lowing pro c ed ur e s bef ore start ing adjust m ent.
RE PLACING PR OC ED UR ES (1)
Turn the POWER OFF.
(2)
Replace the IC301 with a new one.
(3)
While pressing MENU button and VOL+ button ON the FRONT Panel simultaneously, turn the POWER ON. When the POWER is turned ON, the data is writt en in th e mic ro-com pu ter immed i at ely.
LOCATIONS OF FRONT PANEL BUTTONS AND LAMPS
1
MENU buttons
2
CHANNEL ∨/∧ buttons
(MENU ∨/∧ buttons)
3
VOLUME -/+ buttons
(MENU -/+ buttons)
4
ECO sensor
5
REMOTE CONTROL sensor
6
ON TIMER lamp
7
POWER lamp
8
MAIN POWER button
1
82 3
4 5
6 7
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SERVICE ADJUSTMENT
BEFORE STARTING SERVICE ADJUSTMENT
1. There are 2 way of adjusting this TV: One is with the REMOTE C ONTROL UNIT a nd the oth er is t he conv ention al method using adjustment pa rts and components.
2. The ad justm ent w ith the REM OTE C ONTROL UNIT i s mad e on the basis of the initial setting values. The setting values which adjust the screen to its opt i mum con dit i o n may d iff er from the initial setting values.
3. Make sure that connection is correctly made to AC power source.
4. Turn on the pow er of the set and equipmen t before us e, and start the adjustment procedures after waiting at least 30 minutes.
5. Unless other wise spec ified, pr epare t he most su itab le rec eption or input signal for adjustment.
6. Never touch any adjustment par ts, which are not s pecified in the list for t hi s a djust men t VR s, tr an sfor ms, cond en sers, etc.
7. Preparation for adjustment Unless oth erwis e sp ec if ied in th e adj us tm en t i ns tr uc t i ons , pres et the following functions with the REMOTE CONTROL UNIT.
User mode position
PICTURE MODE (VSM) BRIGHT VNR OFF COLOUR / BRIGHT
CONT. / SHARP
Refer to VSM PRESET
BLUE BACK OFF OFF TIMER OFF ECO SENSOR OFF AUTO SHUT OFF OFF
MEASURING INSTRUMENT AND FIXTURES
1. DC voltmeter (or digital voltmeter)
2. Oscilloscope
3. Signal generator (Pat tern generator) [PAL / SECAM / NTSC]
4. Remote control unit
ADJUSTMENT ITEMS
Adjustment item Adjustment item
B1 POWER SUPPLY
DEF. circuit adjustment
FOCUS adjustment VSM PRESET setting IF circuit adjustment
PURITY / CONVERGENCE adjustment
V/C (Video / Chroma) circuit adjustment
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BASIC OPERATION OF SERVICE MENU
"
The adjustment using SERVICE MENU
The followi ng adjustm ent items us e the SERVICE MEN U in the seri es of the adjust ment. The adjus tments ar e made on the basis of the initial setting values. The adjustment values which adjust the screen to the optimum condition can be different from the initial setting values. With the SERVICE MENU, various settings can be made, and they are broadly classified in the following items of settings.
1.IF
・・・・・・・・・・・・・・・・・・・・・・・・
Adjustment of the IF circuits.
2.V/C
・・・・・・・・・・・・・・・・・・・・・・
Adjustment of the VIDEO/CHROMA circuit.
3.DEF
・・・・・・・・・・・・・・・・・・・・・
Adjustment of the DEFLECTION circuit.
4.VSM PRESET
・・・・・・・・・・・・・
Adjustm en t of th e initial sett in g val u es of VS M c on dit i on as S T A ND AR D , SO FT and BRIGH T . (VSM : Video Status Memory)
5.PRESET
・・・・・・・・・・・・・・・・・
Adju stment of the RF circuit
[Do not adjust]
.
6.TURBO TIMER
・・・・・・・・・・・・
For quick s ett i ng t h e TIME R count val u e, adjustable not onl y b y mi nuets but also by second.
[Should be OFF]
.
"
Key operation of the SERVICE MENU
[Enter to SERVICE MENU]
Press the
DISPLAY
key and th e
PICTURE M ODE
key of the REMOTE CONTROL
UNIT simultaneously. Then enter the SERVICE MENU mode as shown in Fig.1.
[Exit from SERVICE MENU]
When complete the adjustment work, press the
DISPLAY
key to return to the SERVICE MENU. And then press the
DISPLAY
key again, return to the normal screen.
[Select from SERVICE MENU]
In SERVICE MENU , pr ess the numb er (1~6) key of the remote control unit, to select any of the adj us t m en t items.
SERVICE MENU
SERVICE MENU
1.IF 2.V/C
3.DEF 4.VSM PRESET
5.PRESET
6.TURBO TIMER O FF
1-6 SELECT DISP : EXIT
******
************
***********
**********
***** **
****
**.***
******
***
*** ** **
*** ** ***** ** **
*** ** **** ***
** ***** ***
** ***
Fig.1
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
MENU
▼/▲
key
MENU
-/+
key
DISPLAY ke y
PICTURE
MODE key
NUMBERS
key
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