Sharp 21v1-l Service Manual

 
SERVICE MANUAL
COLOUR TELEVISION
Chassis No. GA6
21V1-L
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 indentical to those specified should be used.
S8811021V1L
MODEL
ELECTRICAL SPECIFICATIONS
Chassis No. GA8
CONTENTS
 IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................................... 1-1Page
 LOCATION OF USER’S CONTROL...

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E CHAPTER 1. IMPORTANT SERVICE SAFETY PRECAUTION
IMPORTANT SERVICE SAFETY PRECAUTION
Service work should be performed only by qualified service technicians who are
thoroughly familiar with all safety checks and the servicing guidelines which follow:
X-RADIATION AND HIGH VOLTAGE LIMITS
1. Be sure all service personnel are aware of the
procedures and instructions covering X-radiation.
The only potential source of X-ray in current solid
state TV receivers...

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SAFETY NOTICE
Many electrical and mechanical par ts in television
receivers have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be
necessarily increased by using replacement components
rated for higher voltage, wattage, etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components having such features are identified by 

and shaded...

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E CHAPTER 2. LOCATION OF USERS CONTROL
[1] LOCATION OF USERS CONTROL 

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E CHAPTER 3. INSTALLATION AND SERVICE INSTRUCTIONS
CIRCUIT PROTECTION
The receiver is protected by a 3.15A fuse (F701),
mounted on PWB-A, wired into one side of the AC
line input.
X-RADIATION PROTECTOR CIRCUIT TEST
After service has been performed on the horizontal
deflection system, high voltage system, B+ system,
test the X-Radiation protection circuit to ascertain
proper operation as follows:
1. Apply 110~220V AC using a variac transformer for...

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E CHAPTER 4. SERVICE MODE
SERVICE MODE
Adjustment mode
Setting mode
First mode of service when entering by
SERVICE key.
First mode of service when entering by
2 local keys.
Option mode
Confirmation mode
1. Service mode is switched by SERVICE key, CH UP + VOL DOWN when reset.
2. Service mode is cancelled by SERVICE key during Service mode.
3. Service mode can be switched to the following 5 modes via MENU key:
4BîDuring Service mode, AFT operation is...

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Adjustment Mode Items
Data Service Mode Function Range Default Data
V01 SUB-CON CONTRAST 0~127 127
V02 SUB-TINT TINT 0~127 64
V03 SUB-COL COLOR 0~127 64
V04 SUB-BRI BRIGHT 0~255 128
V05 SUB-SHP-PRE VIDEO-TONE(PRE) 0~63 41
V06 SUB-SHP-OVER VIDEO-TONE(OVER) 0~63 41
V07 V-SHIFT V-SHIFT 0~7 4
V08 H-SHIFT H-PHASE 0~31 16
V09 RF-AGC RF-DELAY 0~127 127
V10 V-SIZE V-SIZE 0~63 32
V11 V-SHIFT50 V-SHIFT(OFFSET) -7~+7 0
V12 H-SHIFT50 H-PHASE(OFFSET) -15~+15 0
V13 V-SIZE50 V-SIZE(OFFSET) -31~+31 0
V14...

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AUTO ADJUSTMENT
H-VCO
RF-AGC
PIF-VCO


1. When there is H-VCO auto adjustment key input at item
H-VCO, auto adjustment will be implemented.
2. H-FREE (1chip) is set to 1.
3. H-OUT (1chip) is set by intelligent monitor output.
4. IM input becomes TIM input.
5. H-VCO (1chip) data is changed so that the number is 126 inside 8ms interval.
6. When adjustment is completed, OSD display and H- VCO auto adjustment data of EERPOM are updated.
7. H-FREE
(1chip), intelligent monitor ou tput, IM input...

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Setting Mode Items
Data Service Mode Function Range Default Data
F01 ABCL-Gain ABCL-G 0/1 0
F02 SHP-AV-PRE VIDEO-TONE (PRE) -16~+16 0
F03 SHP-YUV-PRE VIDEO-TONE (PRE) -16~+16 0
F04 SHP-P-PRE VIDEO-TONE (PRE) -31~+31 0
F05 SHP-N3-PRE VIDEO-TONE (PRE) -31~+31 0
F06 SHP-AV-OVER VIDEO-TONE (OVER) -16~+16 0
F07 SHP-YUV-OVER VIDEO-TONE (OVER) -16~+16 0
F08 SHP-P-OVER VIDEO-TONE (OVER) -31~+31 0
F09 SHP-N3-OVER VIDEO-TONE (OVER) -31~+31 0
F10
SHP ANT-ON II OFFSETVIDEO-TONE -15~0 -10
F11 RGB-CLIP...

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F55 R-CUT-YUV R-CUT (OFFSET) -63~+63 0
F56 G-CUT-YUV G-CUT (OFFSET) -63~+63 0
F57 B-CUT-YUV B-CUT (OFFSET) -63~+63 0
F58 R-DRI-YUV R-DRI (OFFSET) -63~+63 0
F59 B-DRI-YUV B-DRI (OFFSET) -63~+63 0
F60 CONTRAST OFFSET CONTRAST(OFFSET) -63~+63 0
F61
CONTRAST YUV OFFSETCONTRAST(OFFSET) -63~+63 0
F62 BRIGHT OFFSET BRIGHT (OFFSET) -63~+63 0
F63 BRIGHT AV2 OFFSET BRIGHT (OFFSET) -15~+15 1
F64 BRIGHT YUV OFFSET BRIGHT (OFFSET) -63~+63 0
F65 TRAP
TRAP-FINE 0~3 2
F66 TRAP-PTRAP-FINE 0~3 2
F67...