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Service Manual - Page 1
...
MODEL : ZHD-311 LHS-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...
Service Manual - Page 3
...Repair... damaged. Absolutely never permit laser beams to the laser output part (lens, etc.) of the pick-up . Also NEVER ... Sheet
6) Never attempt to external pressure or impact. GENERAL
SERVICING PRECAUTIONS
NOTES REGARDING HANDLING OF THE PICK-UP
1. NEVER look...of precision, and for that reason the adjustment point and installation screws should absolutely never be touched. 4) Laser beams ...
Service Manual - Page 4
... be handled with a conductive sheet and grounded.
These components
are sensitive to avoid repair or storage where the temperature of many ICs as well as the pick-up is...is present, or where there is high voltage, components can be damaged, and for repair 1) Before replacing a component part, first disconnect the power supply lead wire from the unit 2) All equipment, measuring ...
Service Manual - Page 5
...install it. (Most replacement ESD devices are packaged with ESD devices, place the assembly on your foot from the leads of a replacement ESD device, touch the protective material to the chassis or circuit assembly into which should be used to help... (ESD). WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED "DANGEROUS VOLTAGE" THAT MAY BE...
Service Manual - Page 6
SPECIFICATIONS
GENERAL
Power supply
Refer to main label
Power consumption
Refer to main label
Weight
2.5 kg
External dimensions (W x H x D) 360 x 56 x 310 mm
Operating conditions Temperature: 5°C to 35°C, Operation status: Horizontal
Operating humidity
5% to 85%
CD/DVD... sound mode settings and the source...Jacks (ø3.5mm) (KARAOKE MODEL ONLY))
SPEAKERS
Type Impedance ...
Service Manual - Page 24
... and disc type 2.
No
1. Jump to Inner Position
1. Display tray open message & LOGO
No
Receive
Yes
CLOSE Key?
3-1 Write RISC code to Closed position
SLED at Inner
Yes
Side? Stop Playback & Open Tray 2. Systemoperati on Routi ne Loop
1. Reset RISC
Show LOGO
Yes Tray Closed?
No
Tray Close to SDRAM 3. DVD & AMP PART
ELECTRICAL TROUBLESHOOTING GUIDE
1.
Service Manual - Page 25
Check systemreset circuit. 3. Check FLASH R/Wenable signal PRD,
RWR. 4. Yes
Update FLASH(IC500)
No
successfully?
2.
Replace FLASH( IC500)
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...
Service Manual - Page 30
Normal PWM IC out?(IC300)
Check connection between IC300 ABCK, ALRCK, ASDAT
Check the related circuit of PWM.(Check Audio out Pins52, 54, 55, 59,62, 68
Check Digital Amp circuit (IC301, IC302)
3-7
E
PWM IC received correct data
stream?
Service Manual - Page 31
... FLD?
YES
Does no Disc or Time NO Check power part of X101. B/D. YES
YES
Refer to oscillator Circuit.
YES
Check Power. Check DVD Module.
Check Power section Circuit. OK
YES
Does Loading appear...IC101 Pin96 NO is high. YES
Check 3.3V line.
YES
NO Does it appear DVD Error NO at FLD? Check if DVD an Audio Micom Insert is OK. YES
NO Check oscillator of Main NO
appear at ...
Service Manual - Page 39
8. 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
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 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. 9.
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 50
SECTION 4. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION
463
463 463
KARAOKE OPTION
283
452
A26
274
A41 A43
452 274
A50 279
261
261
463 463
463 A47
465
261 A44
320
A46 305
OPTIONAL PART 351
463
4-1
4-2
Service Manual - Page 51
...GUIDE FRAME BASE MOTOR ASSEMBLY GEAR GEAR TRAY GEAR PWB(PCB) ASSEMBLY,TOTAL CABLE,FLAT SHAFT SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING
NSP : Non SVC Parts
SPECIFICATION...NSP
DECK/MECHA DP9 FEEDING
DVD DP-9 PINION MOLD
DVD DP-9 MIDDLE MOLD
DVD DP-9T(9T-SLIM) DISK MOLD
DVD DP-9 RACK MOLD
DP-9T FEEDING
P=1.0 FFC UL2896(0.05X0.65) 11
DVD PU, DR-02 SUS-...
Service Manual - Page 53
... 951 952 953 954 955 956 957 958 A900
PART NO.
3720RMF085D 5208RM0056B 4766RM0097A 3701RM0060A 353M050C 6400WSMH01A 3091RMW164A 3610RM0009A 6871RU9271F 6401RM0227A
DESCRIPTION
PANEL,FRONT DUCT FELT NET ASSEMBLY SCREW,DRAWING SPEAKER,WOOFER CABINET ASSEMBLY FOOT PWB(PCB) ASSEMBLY,SUBSET(AUDIO SPEAKER ASSEMBLY
5-2
SPECIFICATION
SPK LHS-25SCW MOLD S33-740-A32 SPK LHS...
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