LG ZHD-311 Support Question
LG ZHD-311 Support Question
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Question posted by fernandezagapito on August 17th, 2011
No Video Output Not Play Any Dvd's
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Related LG ZHD-311 Manual Pages
Service Manual - Page 1
...-25SCS/LHS-25SCW
SERVICE MANUAL
Product Type: DVD/CD RECEIVER Chassis: DP9 Manual Series: ZHD-311,
LHS-25SCS, LHS-25SCW Manual Part #: Model Line: D Product Year: 2005
Model Series:
ZHD-311
Printed in U.S.A
CONTENTS
GENERAL 1 AUDIO PART 2 DVD & AMP PART 3 EXPLODED VIEWS 4 SPEAKER PART 5 REPLACEMENT PARTS LIST 6
Published May 2005 by Technical Publications Zenith Electronics Corporation...
Service Manual - Page 3
... Cotton swab
Conductive Sheet
6) Never attempt to external pressure or impact. If it is damaged. SECTION 1. Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up is held by excess pressure. When cleaning the lens surface, therefore, a cotton swab should never be touched. 4) Laser...
Service Manual - Page 6
... humidity
5% to 85%
CD/DVD
Laser Signal system Frequency response (audio) Signal-to-noise ratio (audio) Dynamic range (audio) Harmonic distortion (audio) Video output
Semiconductor laser, wavelength 650 nm ... Surround mode
(* Depending on the sound mode settings and the source, there may be no sound output.)
Outputs
Front: 30W + 30W (THD 10 %) Center*: 30W Surround*: 30W + 30W (6Ω at...
Service Manual - Page 24
...
Receive
Yes
CLOSE Key?
3-1
No
SLED Moves to Closed position
SLED at Inner
Yes
Side? System operation flow
Power On
1. 8082 initializes SERVO, DSP & RISC registers 2. Reset RISC
Show LOGO
Yes Tray Closed?
Jump to SDRAM 3. DVD & AMP PART
ELECTRICAL TROUBLESHOOTING GUIDE
1. Write RISC code to related disc reading procedure
Recieve OPEN...
Service Manual - Page 25
.... 3. 2. No
(-34V,-9V,36V,5.6V
,5V,8V,9V,2.5V,
3.3V)
Yes
Check the POWER PART Check the POWER PART
Are 3.3V and 5V DC No outputs normal on the Power PCBA
Is the
DC Voltage outputs OK? Check 27MHz system clock. 2.
Check FLASH R/Wenable signal PRD,
RWR. 4. Check FLASH Memory related circuit.
Service Manual - Page 31
... is high. Check Power section Circuit. OK
YES
Does Loading appear at FLD? YES
Check Power.
AUDIO µ-COM Circuit(DVD & AMP)
POWER ON
Does CD/DVD appear NO at FLD? Check if DVD an Audio Micom Insert is OK.
YES
NO Check oscillator of Main NO
appear at FLD? YES
Does CD...
Service Manual - Page 32
SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 1) ES6698FD main clock is at 27MHz(X501)
3.8V, 27MHz
FIG 1-1
2) ES6698FD reset is high active. Power Cord in
FIG 1-2 3-9
5.2VA PWR_CTL(SYSTEM µ-COM) IC501 PIN83) M_RESET(IC501 PIN 207)
URST(IC501 PIN 188)
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING
1.
Service Manual - Page 39
FOCUS ON WAVEFORMS
FE(IC401 PIN 40)
FOSO(IC501 PIN12) F+(IC404 PIN 14) F-(IC404 PIN 13)
FIG 8-1 (DVD)
FE(IC401 PIN 40) FOSO(IC501 PIN12) F+(IC404 PIN 14) F-(IC404 PIN 13)
FIG 8-2 (CD) 3-16 8.
Service Manual - Page 40
TRACKING CONTROL RELATED SIGNAL(System checking)
TE(IC401 PIN 39) TRSO(IC501 PIN 13) T-(IC404 PIN 16) T+(IC404 PIN 15)
FIG 10-1(DVD) 3-17 9. SPINDLE CONTROL WAVEFORMS (NO DISC CONDITION)
DMSO(1.4V/1.8V) (IC501 PIN 18) SP-(3.6V/2.4V) (IC404 PIN 18) SP+(3.6V/4.8V) (IC404 PIN 17)
FIG 9-1
10.
Service Manual - Page 42
ES6698FD VIDEO OUTPUT WAVEFORMS 1) Full colorbar signal(COMPOSIT)
(IC501 PIN 110)
2) Y
FIG 12-1
(IC501 PIN 113) FIG 12-2
3-19 12.
Service Manual - Page 43
AUDIO OUTPUT FROM PWM IC 1) Audio L/R
(IC300 PIN 68, 49)
2) Audio related Signal
FIG 13-1
ASDATA3
FIG 13-2 3-20
ASDAT0(IC501 PIN 117) ABCK(IC501 PIN 123)
ALRCK(IC501 PIN 116) 13.
Service Manual - Page 44
DVD & AMP WAVEFORMS
1)
2)
• R315 → FRONT L
3)
• R310 → FRONT R
4)
• R316 → REAR
5)
• R324 → REAR
6)
• R303 → CENTER
• R317 → WOOFER
3-21 14.
Service Manual - Page 51
...ESS-SAMSUNG
CLAMP
NSP
CLAMP(LDM-R608,10*5,1*1.5T)
NSP
UPPER DP7
NSP
P=1.0 FFC UL2896(0.035X0.7) 23
DVD DP-6, DP-8 FRONT RIGHT 20
DVD REAR DP8 RIGHT 20 OTHER BL
DECK/MECHA DP2-5, DP7C,DP7A OT
DECK/MECHA DP8 PULLEY MOLD
DECK/... SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING
NSP : Non SVC Parts
SPECIFICATION
HOME THEATER LH-TK750/550/250
REMARKS
DISC DP7 - NO.
LG Knowledge Base Results
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Television: Noise/Audio problems - LG Consumer Knowledge Base
... menu. 3. Make sure these options are not selected if a home theater system is not selected in audio menu. Make sure SAP or audio ... be used , check settings on English. 5. This can affect the audio output. Television: No Signal Television: Firmware Updates - Using the TV audio ... bad on the front panel of TV menu. 4. If a DVD or VCR is corrected, bad cable may cause audio problems. If... -
Blu-ray player: Checking for updated firmware from within the player. - LG Consumer Knowledge Base
Example update alert from an LG Blu-ray enabled home theater system Example update alert from within the player? Periodically, checking ... and press the key. Ensuring the newest releases play the first time. - If an update is available, your firmware update disc may be created via LG's service website . DVD Player (Combo/Recorder) Network connection options for certain... -
LHB975 Rear Speaker / Subwoofer Syncing - LG Consumer Knowledge Base
...please repeat steps 1-4. Remove the power cord from the rear speakers or subwoofer of the home theater system, and the LED indicators are RED, please follow the steps outlined below to sync...indicator lights, pairing was successful. NOTE: Wait until the LED power indicator light disappears. / Home Theater LHB975 Rear Speaker / Subwoofer Syncing In a case where there is no sound coming from the ...
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