Sharp 21J-FG1RU User manual

CHAPTER 1. SPECIFICATIONS
[1] SPECIFICATIONS ......................................... 1-1
CHAPTER 2. IMPORTANT SERVICE NOTES
[1] IMPORTANT SERVICE NOTES .................... 2-1
CHAPTER 3. ADJUSTMENT PRECAUTIONS
[1] ADJUSTMENT PRECAUTIONS .................... 3-1
[2] ADJUSTMENT ............................................. 3-14
CHAPTER 4. MEMORY MAP
[1] MEMORY MAP .............................................. 4-1
CHAPTER 5. TROUBLE SHOOTING FLOWCHART
[1] TROUBLE SHOOTING FLOWCHART .......... 5-1
CHAPTER 6. SOLID STATE DEVICE BASE DIA-
GRAM
[1] SOLID STATE DEVICE BASE DIAGRAM........ 6-1
CHAPTER 7. CHASSIS LAYOUT
[1] CHASSIS LAYOUT ........................................ 7-1
CHAPTER 8. BLOCK DIAGRAM
[1] BLOCK DIAGRAM: CRT UNIT ...................... 8-1
[2] BLOCK DIAGRAM: HEADPHONE UNIT........8-1
[3] BLOCK DIAGRAM: MAIN UNIT ....................8-2
CHAPTER 9. DESCRIPTION OF SCHEMATIC DIA-
GRAM
[1] DESCRIPTION OF SCHEMATIC DIA-
GRAM............................................................9-1
CHAPTER 10. WAVEFORM
[1] WAVEFORMS .............................................10-1
CHAPTER 11. SCHEMATIC DIAGRAM
[1] SCHEMATIC DIAGRAM: MAIN UNIT.......... 11-1
[2] SCHEMATIC DIAGRAM: CRT UNIT ........... 11-3
[3] SCHEMATIC DIAGRAM: HEADPHONE
UNIT ............................................................ 11-3
CHAPTER 12. PRINTED WIRING BOARD ASSEM-
BLIES
[1] PWB-B: CRT UNIT ......................................12-1
[2] PWB-C: HEADPHONE UNIT ......................12-1
[3] PWB-A: MAIN UNIT ....................................12-2
Parts Guide
SERVICE MANUAL
CONTENTS
SHARP CORPORATION
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power receptacle, when servicing
this chassis. To prevent electric shock, do not remove cover. No user - serviceable parts inside. Refer servicing to qualified service personnel.
WARNING
Multi 18 Systems
Full Auto Channel Preset and Auto
Channel Skip
100-CH Program Memory
CATV (Hyper Band) Ready
<Used Frequency Synthesizer Tuner>
Black Stretch Circuit
On Timer / Off Timer / Reminder Timer
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Blue Back Function
Front AV IN & Rear AV IN / OUT Terminals
Front Headphone Jack
Aperture Control Circuit
Auto Fine Tuning
NTSC Colour Comb Filter (AV THRU)
High Contrast Picture
Hotel Mode
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Russian and English Languages OSD
White Temperature Select
Component In
Surround Sound Effect
(With Bass / Treble / Balance)
AV Stereo
FEATURES
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and
only parts identical to those specified should be used.
21J-FG1RU
No. S75L821JFG1RU
COLOUR TELEVISION
Chassis No. GA-4M
21J-FG1RU
MODEL

21J-FG1RU
1 – 1
21J-FG1RU Service Manual
CHAPTER 1. SPECIFICATIONS
[1] SPECIFICATIONS
Convergence ................................................................................................................ Self Convergence System
Focus
............................................................................................................................... UNI-BI Focusing
Sweep Deflection ..................................................................................................................................... Magnetic
Intermediate Frequencies
Picture IF Carrier ................................................................................................................................. 38.9MHz
Sound IF Carrier Frequency
6.5MHz ............................................................................................................................................. 32.4MHz
6.0MHz ............................................................................................................................................. 32.9MHz
5.5MHz ............................................................................................................................................. 33.4MHz
Colour Sub-Carrier Frequency........................................................................................................... 34.47MHz
Cabinet material ..................................................................................................................................... All Plastics
Specifications are subject to change without prior notice
Aerial Input Impedance
VHF/UHF .......................................................................................................................... 75 ohms Unbalanced
Receiving System ................................................................................. PAL I, B/G, D/K & SECAM B/G, D/K, -K1
Receiving Channel
VHF-Channels ......................................................................................... E2(48.25MHz) thru E12(224.25MHz)
C1(49.75MHz) thru C12(216.25 MHz)
S1(105.25MHz) thru S41(463.25HMz)
UHF-Channels ..................................................................................... E21(471.25MHz) thru E69(855.25MHz)
C13(471.25MHz) thru C57(863.25MHz)
.
Power Input ..................................................................................................................... 220 ~ 240V AC 50/60 Hz
Power Consumption.........................................................................................................................
.... ....... .
101W
Audio Power Output Rating .............................................................................................................. 5W (rms) x 2
Voice Coil Impedance .............................................................................................................16 ohms at 400 Hz
.............................................................................................................................
Speaker
12 x 6 cm Elliptic (2 pcs)
Size
Dimensions ..................................................................................................................................... Width: 605mm
Height: 468mm
Depth: 482mm
Weight(approx): 21.7 kg

21J-FG1RU
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21J-FG1RU Service Manual
CHAPTER 2. IMPORTANT SERVICE NOTES
[1] IMPORTANT SERVICE NOTES
Maintenance and repair of this receiver should be done by qualified service personnel only.
1. SERVICE OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE
When servicing the high voltage system, remove static charge from it by connecting a 10K ohm resistor in series with an insulated wire (such as a test
probe) between picture tube dag and 2nd anode lead. (AC line cord should be disconnected from AC outlet.)
1) Picture tube in this receiver employs integral implosion protection.
2) Replace with the same type number of picture tube for continued safety.
3) Do not lift picture tube by the neck.
4) Handle the picture tube only when wearing shatterproof goggles and after discharging the high voltage completely.
2. X-RAY
This receiver is designed so that any X-Ray radiation is kept to an absolute minimum. Since certain malfunctions or servicing may produce potentially
hazardous radiation with prolonged exposure at close range, the following precautions should be observed:
1) When repairing the circuit, please make sure do not increase the high voltage of the set to more than 30.0kV (at beam 0µA).
2) To keep the set in a normal operation, please make sure it’s function at 26.5kV ±0.5kV (at beam 1,000µA). The set has been factory - adjusted to
the above-mentioned high voltage.
*If there is a possibility that the high voltage fluctuates as a result of the repairs, never forget to check for such high voltage after the work.
3) Do not substitute a picture tube with unauthorizerd types and/or brands which may cause excessive X-ray radiation.
3. BEFORE RETURNING THE RECEIVER
Before returning the receiver to the user, perform the following safety checks.
1) Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the
receiver.
2) Inspect all protective devices such as non-metal control knobs, insulating materials, cabinet backs, adjustment and compartment covers or
shields, isolation resistor-capacity networks, mechanical insulators etc.

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21J-FG1RU Service Manual
CHAPTER 3. ADJUSTMENT PRECAUTIONS
[1] ADJUSTMENT PRECAUTIONS
This model's setting are adjusted in two different ways: through the I2C bus control and in the conventional analog manner. The
adjustments via the I2C bus control include preset-only items and variable data.
CAUTION: Make sure TV set in "Normal condition" before switch to Service Mode for adjustment.
1. Setting the service mode by the microprocessor.
i) Press SERVICE key on the remote controller to set the TV set to SERVICE mode position, and the microprocessor is in input
mode. (Adjustment through the I2C bus control).
ii) Press the MENU key on the remote controller to get ready to select the mode (Adjustment mode, Setting mode, Check mode and Option
mode) one by one.
iii) Press the CH DOWN / UP key on the remote controller to select the item in Adjustment mode, Setting mode or Option mode.
iv) Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified. Please wait approximately 200 msec for data storage
in EEPROM before select to another mode.
v) In Check mode the data cannot be changed.
vi) Press the SERVICE key again, it will switch to the NORMAL mode position, and the microprocessor is out of the SERVICE mode.
2. Factory Presetting.
i) Power ON the TV set, press the SERVICE key on the remote controller, then press both the CH UP and VOL UP button on the set
simultaniously for 5secs. Initial values are automatically preset, only when a new EEPROM is used.
ii) The initial data are preset as listed in page 3-7 to 3-12.
iii) Make sure the data need modification or not (Initial data).
Precaution: If haven't done this initialization, it may possibly generate excessive Beam current.
3. For reference please check with memory map RH-IXB226WJZZ (See Page 4-1 ~ 4-16)

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1. ADJUSTMENT ITEM
***Below are the adjustment items that should be done, PLS FOLLOW THE PROCEDURE. Otherwise some adjustment items will
not be accurate.
NO *** ADJUSTMENT ITEM EFFECTIVE MODEL REVISION
1BUSSETUP
21J-FG1RU
2 OPTION SET UP
3H-VCO
4VIF-VCO
5 S-TRAP fo
6RF-AGC
7 PURITY ADJ
8 CONVERGENCE ADJ
9 FOCUS ADJ
10 V-SHIFT (50 Hz)
11 H-SHIFT (50 Hz)
12 V-SIZE (50 Hz)
13 SCREEN
14 WHITE BALANCE
15 SUB-BRIGHTNESS
16 SUB-CONTRAST
17 SUB-TINT
18 SUB-COLOR
19 SECAM-OFFSET
20 SIF VCO ADJ
21 BEAM CURRENT CHECK
22 BEAM PROTECTOR CHECK
23 HV PROTECTOR CHECK
24 OTHER PROTECTOR CHECK
25 AV OUT CHECK
26 AV IN CHECK
27 COMPONENT IN CHECK
28 CONTRAST CONTROL CHECK
29 COLOR CONTROL CHECK
30 BRIGHTNESS CONTROL CHECK
31 TINT CONTROL CHECK
32 SHARPNESS CONTROL CHECK
33 CH DISPLAY COLOR CHECK
34 NORMAL DISPLAY CHECK
35 WHITE TEMP CONTROL CHECK
36 COLOR SYSTEM CHECK
37 SURROUND CHECK
38 TREBLE CHECK
39 BASS CHECK
40 BALANCE CHECK
41 SOUND SYSTEM CHECK
42 NOISE MUTE CHECK
43 OSD LANGUAGE QUANTITY CHECK
44 HEAD PHONE CHECK
45 SHOCK TEST CHECK

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2. USER DATA IN SERVICE MODE
1) While SERVICE mode ON, EEPROM DATA will switch to the service data. Also, once SERVICE mode OFF, EEPROM will switch back to previous
USER DATA.
2) In the service mode, the user data establish as below,
*1: For each CH, data is same as before switch to Service mode.
The flow of Mode list as following,
* Direct Key-in Mode for Service Items in Service Mode
USER DATA
CONTRAST MAX (60)
COLOUR CENT (0)
BRIGHTNESS CENT (0)
TINT CENT (0)
SHARPNESS CENT (0)
WHITE TEMP STANDARD
S-VOLUME MIN
SURROUND OFF
TREBLE CENT (0)
BASS CENT (0)
BALANCE CENT (0)
BLUE BACK OFF
C SYSTEM AUTO
S SYSTEM *1
RC CODE (HEX) R/C KEY NAME SERVICE-ITEM
80 POS 1 R-C UP (IN SERVICE MODE V00)
40 POS 2 G-C UP (IN SERVICE MODE V00)
C0 POS 3 B-C UP (IN SERVICE MODE V00)
20 POS 4 R-C DOWN (IN SERVICE MODE V00)
A0 POS 5 G-C DOWN (IN SERVICE MODE V00)
60 POS 6 B-C DOWN (IN SERVICE MODE V00)
E0 POS 7 R-D UP (IN SERVICE MODE V00)
10 POS 8 B-D UP (IN SERVICE MODE V00)
50 POS 0 B-D DOWN (IN SERVICE MODE V00)
E4 FLASHBACK R-D DOWN (IN SERVICE MODE V00)
E4 FLASHBACK Y-MUTE (BESIDES OF SERVICE MODE V00)
75 WHITE TEMP UP RF-AGC (V01)
F5 WHITE TEMP DOWN VIF-VC0 (V02)
C2 TUNE DOWN H-VCO (V03)
8D SHARPNESS DOWN SUB-CON (V04)
D6 BALANCE LEFT SUB-COL (V05)
0D SHARPNESS UP SUB-BRIGHT (V06)
36 BALANCE RIGHT SUB-TINT (V07)
46 TREBLE UP SUB-SHP (V08)
C6 TREBLE DOWN SUB-COL-YUV (V09)
26 BASS UP SUB-TINT-YUV (V10)
24 COLOUR UP V-SIZE (V11), V-SIZE60 (V17)
54 BRIGHTNESS DOWN V-SHIFT (V12), V-SHIFT60 (V18)
74 TINT DOWN H-SHIFT (V13), H-SHIFT60 (V19)
66 SURROUND UP SCM-BR (V14)
E6 SURROUND DOWN SCM-BB (V15)
C4 CONTRAST DOWN SUB-VOL (V16)
4C PICTURE S-TRAP-BG (V20)
CC HOLD S-TRAP-I (V21)
2C TEXT S-TRAP-DK (V22)
AC CANCEL S-TRAP-M (V23)
EC SIZE S-TRAP-574 (V24)
80 POS 1 R-C UP YUV (IN SERVICE MODE V25)
40 POS 2 G-C UP YUV (IN SERVICE MODE V25)
C0 POS 3 B-C UP YUV (IN SERVICE MODE V25)
20 POS 4 R-C DOWN YUV (IN SERVICE MODE V25)

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1) Please set the MCL to MCL1 as below.
2) After set the MCL , please set the INITIAL SETTING.
INTIAL 5: For Russia ( All Channel Sound System are set to D/K )
A0 POS 5 G-C DOWN YUV (IN SERVICE MODE V25)
60 POS 6 B-C DOWN YUV (IN SERVICE MODE V25)
E0 POS 7 R-D UP YUV (IN SERVICE MODE V25)
10 POS 8 B-D UP YUV (IN SERVICE MODE V25)
50 POS 0 B-D DOWN YUV (IN SERVICE MODE V25)
E4 FLASHBACK R-D DOWN YUV (IN SERVICE MODE V25)
C1 AUTO ADJ FOR V01, V02, V03, V20, V21, V22, V23, V24
CA T-SET
81 SERVICE MODE
MCL1 (HEX AE)
CH-No Fv (MHz) Sound Sys
0
1 48.25 B/G
2 62.25 B/G
3 77.25 D/K
4 175.25 B/G
5 182.25 B/G
6 183.25 D/K
7 191.25 D/K
8 196.25 B/G
9 199.25 M
10 210.25 B/G
11 224.25 B/G
12 471.25 B/G
13 487.25 I
14 503.25 B/G
15 575.25 B/G
16 583.25 B/G
17 599.25 B/G
18 621.25 M
19 639.25 D/K
20 703.25 B/G
21 735.25 I
22 767.25 B/G
23 815.25 B/G
24 855.25 I
25 855.25 B/G
26 55.25 M
27 83.25 M
28 183.25 M
29 193.25 M
30 217.25 M
31 471.25 M
32 477.25 M
33 693.25 M
34 885.25 M
35 112.25 B/G
36 168.25 B/G
37
38 294.25 B/G
39 463.25 B/G
40
41 647.25 B/G
42 663.25 B/G
43 679.25 B/G
44 174.95 B/G
45 175.55 B/G
RC CODE (HEX) R/C KEY NAME SERVICE-ITEM

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NOTE: PLL DATA OF ABOVE FREQ SHOULD TAKE THE ACCOUNT OF PIF SETTING IN SERVICE OPTION O04 (VIF) BEFORE STORING INTO
EEPROM
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
MCL1 (HEX AE)
CH-No Fv (MHz) Sound Sys

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3. SHIPPING SETTING & CHECKING
1) The following default data has been factory-set for the E2PROM
follow by INITIAL DATA selected.
FACTORY SETTING BY MODEL
(Reference: Geomagnetism Adjustment)
ITEMS DATA SETTING
LAST POWER ON
LAST TV/AV MODE TV MODE
LAST POSITION CH 1
FLASHBACK CHANNEL CH 1
1/2 DIGIT ENTRY 2 DIGIT ENTRY
VOLUME 0 (Min)
BLUE BACK OFF
OFF TIMER --:--
ON TIMER --:--
ON TIMER POSITION --
ON TIMER VOLUME --
REMINDER --:--
AFT ALL CH ON
COLOR SYSTEM ALL CH AUTO
SKIP ALL CH OFF
CONTRAST 60
COLOR 0
BRIGHTNESS 0
TINT 0
SHARPNESS 0
WHITE TEMP 0
SURROUND OFF
TREBLE 0
BASS 0
BALANCE 0(CENTER)
INITIAL LANGUAGE SOUND SYSTEM
1 CHINESE D/K
2 CHINESE I
3ENGLISH B/G
4 ARABIC B/G
5 RUSSIAN D/K
6 MALAY B/G
7 FRENCH D/K
MODEL MAGNETIC FIELD(V, H) nT BACKGROUND LANG. S-SYS LANG QTY
RUSSIA 45000 20000 7500°K RUSSIAN D/K 2
*NOTE FOR OSD TYPE:
2: ENGLISH/RUSSIAN

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**AFTER INITIALIZED THE EEPROM (REFER TO FACTORY PRESETTING), READ DATA FROM EEPROM ADDRESS 00H ~ 03H,AND COM-
PARE TO THE LIST BELOW, IF DIFFERENT, INITIALIZE THE EEPROM.
*** There are four stages of service mode data. First stage data from V00~V31 (Adjustment Mode).
To go into second stage of service mode data, press MENU key.Second stage data from F01~F142 (Setting Mode).
To go into third stage of service mode data, press MENU key.Third stage data is Check Mode.
To go into fourth stage of service mode data, press MENU key.Fourth stage data from O01~O31 (Option Mode).
ADDRESS DATA ADDRESS DATA
00H: 7BH 02H: 72H
01H: 72H 03H: 76H
ADJUSTMENT MODE (FIRST STAGE)
EEPROM ITEMS OSD DATA LENGTH INITIAL DATA FIX/ADJ/AUTO REMARK
R-DRIVE V00 0~127 63 ADJ PLS REFER TO
B-DRIVE V00 0~127 63 ADJ ADJ ITEM FOR
R-CUT V00 0~255 127 ADJ SCREEN AND
G-CUT V00 0~255 127 ADJ WHITE BALANCE
B-CUT V00 0~255 127 ADJ
RF-AGC V01 0~127 50 AUTO
VIF-VCO V02 0~63 31 AUTO
H-VCO V03 0~7 3 AUTO
SUB-CONTRAST V04 0~127 100 ADJ
SUB-COLOR V05 0~127 63 ADJ
SUB-BRIGHT V06 0~255 127 ADJ
SUB-TINT V07 0~127 63 ADJ
SUB-SHARPNESS V08 0~63 43 *FIX BUS SETUP
SUB-COLOR -YUV V09 0~127 90 *FIX BUS SETUP
SUB-TINT-YUV V10 0~127 63 FIX
V-SIZE 50 Hz V11 0~63 38 ADJ
V-SHIFT 50 Hz V12 0~7 3 ADJ
H-SHIFT 50 Hz V13 0~31 9 ADJ
SECAM-BR V14 0~63 37 ADJ
SECAM-BB V15 0~63 22 ADJ
SUB-VOL V16 0~60 60 FIX
V-SIZE 60 Hz V17 -31~0~+31 0 FIX IF NECESSARY, ADJ
V-SHIFT 60 Hz V18 -7~0~+7 -1 FIX IF NECESSARY, ADJ
H-SHIFT 60 Hz V19 -15~0~+15 +2 FIX IF NECESSARY, ADJ
S-TRAP (BG) V20 0~15 7 AUTO
S-TRAP (I) V21 0~15 7 AUTO
S-TRAP (DK) V22 0~15 7 AUTO
S-TRAP (M) V23 0~15 7 AUTO
S-TRAP (5.74) V24 0~15 7 AUTO
CUTOFF/BKGD YUV V25
R-DRI YUV V25 0~127 63 FIX
B-DRI YUV V25 0~127 63 FIX
R-CUT YUV V25 0~255 127 FIX
G-CUT YUV V25 0~255 127 FIX
B-CUT YUV V25 0~255 127 FIX
SUB-CON YUV V26 0~127 100 FIX
SUB-BRGHT YUV V27 0~255 127 FIX
VS-CORRECT V28 0~63 32 FIX ONLY FOR M61266
VC-CORRECT OFFSET V29 -13~+13 0 FIX ONLY FOR M61266
V LINEARITY V30 0~63 32 FIX ONLY FOR M61266
V LINEARITY OFFSET V31 -13~+13 0 FIX ONLY FOR M61266