Text preview for : LG_2200N.pdf part of LG 2200N 2200N LG DVD Schematics
Back to : LG_2200N.part1.rar | Home
CIRCUIT DIAGRAM
1. POWER(SMPS) CIRCUIT DIAGRAM
IMPORTANT SAFETY NOTICE WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTETED WITHOUT PERMISSION FROM THE ZENITH ELECTRONICS CORPORATION ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGI-
NAL CIRCUIT SPECIAL COMPONTS ARE SHADED ON NOTE : THE SCHEMATIC FOR EASY IDENTIFICATION. 1. Shaded( ) parts are critical for safety. Replace only THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFwith specified part number. FER FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED.
IC902 is defective. 8V Power Line dead.
Q908, R928, D913 and Q909 are defective. 5V Power Line dead.
IC903 PIN3 (AC110V, PLAY)
IC901 PIN3 (AC110V, STAND-BY)
Q901 and Q902 are defective. FLD(+), FLD(-) are dead.
IC901 is defective. Power dead.
C927, R918, R922 and IC905 are defective. Power dead.
Q903, Q904 are defective. Power control is abnormal.
NOTES) NOTES) NOTES) NOTES)
Warning Parts that are shaded are critical With respect to risk of fire or electricial shock.
3-18
3-19
2. RF & DVD DSP CIRCUIT DIAGRAM
Q202 is defective. DVD LD will not be on. IC204 is defective being slipped during search.
IC209 is defective AD Converter Error
TZC Mirr. Generator
AD Ref. Voltage Gen
RF/TE/FE Signal generation
Q203 is defective CD LD will not be on
Digital Servo DSP/ CD Decoder
Spindle Low Pass Filter
DRAM
3.3V Regulator
IC219 is defective Servo will not operate
IC403 is defective No Spindle Full Speed
T.E F.E
R.F TRACKING LOOP
FOCUS LOOP SLED LOOP
SPINDLE LOOP
3-20
3-21
3. DRIVE CIRCUIT DIAGRAM
SPINDLE
MOTOR DRIVE
SPINDLE TRACKING DOOR
FOCUS SLIED
3-22
3-23
4. MPEG & ENCODER CIRCUIT DIAGRAM
2 1 3 4 6 7 8 9 10 11 12 13
No power on 3.3V Reg.
5
No power on No power on µ-com->MPEG address
ROM
VIDEO ENCODER
14 15
The screen is distorted(DVD) Over 3V->Data error. GND:OK No VCD screen display(option). No CD sound out. No DVD screen display
16
Over 3V->Data error. GND:OK (CD/VCD option) No power on No Audio(check clock)
MPEG2 DECODER
No 5.1CH Audio
18
No 2CH Audio Audio signal doesn't appear No screen No power on µ-com->MPEG command data No power on over 3V: normal
19 20 21 17 25 22
16M SDRAM 16M SDRAM VIDEO ENCODER
No power on Check 89MHz Video Mute doesn't operate in power on/off No Pb output No Pr output No Y output
23
24
No composite video output No Luminance output in Y/C Video No Chrominance output in Y/C Video No power on No power on
CLOCK
VIDEO
26
3-24
3-25
5. AUDIO CIRCUIT DIAGRAM
IC712, 713 are defective Audio bad
Q601 is defective 5.1CH FL/FR Audio out bad IC704 is defective 2CH Audio out bad Q705 is defective 2CH Audio out bad
IC604 is defective 5.1CH FL/FR Audio out bad
IC705,706,707 are defective Audio POP noise or 2CH Audio out bad
Q703,704 are defective Headphone output bad
IC703 is defective 2CH Audio out bad
OPTION
AUDIO DAC
OPTION
IC708 is defective Mic input bad IC601 is defective 5.1CH FL/FR Audio out bad IC602 is defective 5.1CH RL/RR Audio out bad
AUDIO DAC
ADC
IC605 is defective 5.1CH RL/RR Audio out bad
AUDIO DAC
IC710,711 are defective Digital Data out bad
IC603 is defective 5.1CH woofer/center Audio out bad
AUDIO DAC
IC709, 702 are defective Audio pop noise or Audio output bad
IC606 is defective 5.1CH woofer/center Audio out bad
AUDIO DIGITAL DATA INPUT CLOCK DIGITAL DATA OUT
AUDIO 2CH R OUT AUDIO 2CH L OUT AUDIO 5.1 CH FR / RR OUT AUDIO 5.1 CH FL / RL OUT
AUDIO 5.1CH CENTER OUT AUDIO 5.1CH WOOFER OUT
IC607,608,609,610,611,612 are defective Audio pop noise or 5.1CH Audio out bad
3-28
3-29
6. µ-COM/EXPANDER CIRCUIT DIAGRAM
Servo will not operate
OPTION(DIVX)
AT49F8192A-90TC/AM29F800BB
FLASH ROM
GM71C4260CJ60
SDRAM
R197 OPEN
BCA DECODER
E X P A N D E R
D[00:15] ; FLD Error A[00:21] ;FLD Error
MAIN CPU
Video output level is unstable
MUX
X101; No Power on Audio output is unstable Servo will not operate
EEPROM
OPEN, Close Error
3-30
3-31
7. FRONT(TIMER) & KEY CIRCUIT DIAGRAM
SW509 is defective Direction Key is defect DIG501 is defective FLD is distorted
4 Direction S/W
ENTER
SFUTTLE
FRONT CONTROL RESET
JS500 is defective SCAN +/- wll not operate
RE500 is defective R/C receiver Error IC501 is defective Reset Error
Remocon Receiver
OPEN/CLOSE POWER
Q500 is defective LED will not operate
3-32
3-33
8. JACK CIRCUIT DIAGRAM
EXT/DVD can't be changed
16:9 can't be changed
Scart Mode can't be changed
OPTICAL COMP.VIDEO S VIDEO (Y)
S VIDEO (C) AUDIO (L) AUDIO (R)
3-34
3-35
WAVEFORM
(POWER) (VIDEO ENCODER)
Tek Stop : 1 00kS/s [ 3290 Acqs T ] Record Length
Fit to Screen OFF T
500 points in 10divs 1000 points in 20divs 2500 points in 50divs more 1 of 3
3
Ch3
1.00V
M 500µs
CH1
280/mV
Time Base Main
Trigger Position 50%
Record Length 2500
Horiz Scale (/div)
Horiz Pos
FastFrame Setup
IC901 Pin 3 STAND-BY(AC110V)
IC903 Pin 3 PLAY(AC110V)
IC800 Pin 28 ~ 35 , MPEG Data IC801 Pin 13 ~ 16 , 19 ~ 22 , MPEG Data
Tek Stop : 2.50MS/s 4 Acqs [T ]
IC800 Pin 10, Composite IC801 Pin 57, Composite
IC800 Pin 12, Chrominance IC801 Pin 58, Chrominance
Tek Stop : 1 00kS/s [ 3290 Acqs T ] Edge Slope
T
T
3
3
Ch3 1.00V M 500µs CH1 280/mV
M20.0µs Ch3 500mV
Glitch Ch1
2 Apr 1999 14:47:27
Type
Source Ch1
Coupling DC
Slope
Level 280mV
Mode & Holdoff
(RF/SERVO)
IC800 Pin 13, Luminance IC801 Pin 59, Luminance
Tek Stop : 10.0kS/s [ 13 Acqs T ] Edge Slope
IC800 Pin 40, 41 SDA/SCL IC801 Pin 75, 76 SDA/SCL
Tek Stop : 2.50MS/s [ 7 Acqs T ] Edge Slope
IC800 Pin 43, MPEG Clock(27MHz) IC801 Pin 71, MPEG Clock(27MHz)
T
T
3
3
Ch3
1.00V
M 5 .00ms CH1
280/mV Ch3 1.00V
M 20.0µs
CH1
280/mV
Type
Source Ch1
Coupling DC
Slope
Level 280mV
Mode & Holdoff
Type
Source Ch1
Coupling DC
Slope
Level 280mV
Mode & Holdoff
IC201 Pin 21, Focus Error IC201 Pin 19, SBADD
IC201 Pin 20 Tracking Error
IC201 Pin 20 VBR TRACKING Error
IC800 Pin 49, Vertical SYNC IC801 Pin 24, Vertical SYNC
IC800 Pin 50 Horizontal SYNC IC801 Pin 59 Horizontal SYNC
IC801 Pin 42 Component Pb
IC201 Pin 28, RF
IC206 Pin 88, SLED Drive(FMO) IC202 Pin 18, SLED FG
IC201 Pin 21, Focus Error(in Focus Search) IC206 Pin 83, Focus Drive(FDO)
IC801 Pin 43 Component Pr
IC801 Pin 44 Component Y
3-26
3-27