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Service Manual - Page 1
...
AN-28SP2
SERVICE MANUAL
SY0M5LC-28HM2
LCD AV MONITOR
Side Speakers (Option)
LC-28HM2 (E/H/M)
MODEL AN-28SP2
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.
CONTENTS
Page
» IMPORTANT SERVICE SAFETY PRECAUTION ..... 2 » SPECIFICATIONS...
Service Manual - Page 2
... DC power cable into the receiver's
0.15 µF TEST PROBE
DC jack. (Do not use of a substitute replacement parts which must be corrected before servicing. All checks must be repeated with all exposed metal cabinet parts and a known
TO EXPOSED METAL PARTS
CONNECT TO KNOWN EARTH
earth ground, such as electrical conduit or electrical
GROUND...
Service Manual - Page 14
...Replace cable or connector and check connection. Check diodes and others between display and AVC system. Replace PC I /F Unit G/A damage. In this model... case, start -up with such trouble as left. Fault in some cases....
Replace cable or connector and check connection.
LC-28HM2
AN-28SP2
Æ Specific faults...lamp failures recorded. (See the Service Manual.) To simply check the
times of...
Service Manual - Page 16
..., switch on the power. [Contents] Various adjustments can be made manually.
2 Going into the inspection process mode [Procedure] Go into the... the "preset" code is not available Go into the process adjustment. Any time the program has been updated, it takes approx... [Contents] The bar display items such as default setting. LC-28HM2
AN-28SP2
ADJUSTMENT PROCEDURES
When indicating the adjustment ...
Service Manual - Page 17
... off the power once and confirm that the system can be restarted in the 4th line. LC-28HM2
AN-28SP2
4 Process adjustment mode for display only: Switch off the power.
17 Upon this setting, the "lamp error" is reset. (After reset, the fourth line will not become 0 automatically.) After reset, switch off the...
Service Manual - Page 18
... 2 C SECAM BRIGHT 3 C SECAM CONTRAST 4 C SECAM R DRIVE 5 C SECAM B DRIVE 6 C SECAM COLOR 7 C SECAM TINT 8 C SECAM SHARPNESS 9 C SECAM APACONPEAK
10 C SECAM YNR LEVEL 11 C SECAM CDE
Initial setting
Description
Center side microcomputer version
Monitor side microcomputer version
Model selection for each destination
Center side accumulated operation time
Monitor side accumulated operation time...
Service Manual - Page 27
...setting
Adjusting conditions
1. Feed the NTSC video signal.
If "N358" is described as shown in the last part...Model selection (P1L3: MODEL SELECT)
1. Adjusting procedure
1. After above adjustment is deviated from the present adjustment value for final setting...the adjustment point ("a" in the line (P2L5) BR SET FROM N358. LC-28HM2
AN-28SP2
ADJUSTING PROCEDURE
(1) AVC system chassis ...
Service Manual - Page 37
...(No connection to reset lamp error
After parts replacement or repair, reset the lamp error (*1) in the OSD shown on top left of controller Controller setting Write controller setting
VOL UP VOL DOWN INPUT \...that the backlight works again (to the optimum setting. Space is reset (with "0F 00 1"). The error count can be performed manually by the following procedure. Preparation
As power source...
Service Manual - Page 38
... 2nd line of the OSD for display.
00 00 00 00
0 0 ← Set this to 1 to check the display function of the OSD to return. 0 0
Test pattern setting remains after switching off the power.
5. OSD menu display and items in manual adjustment
(1) D/A converter
» Sound
Address 10 11 12 13 14 15 16...
Service Manual - Page 42
...error counter.
Is +5V available at pin (5) of remote controller.
LC-28HM2
AN-28SP2
No power supply
TROUBLE SHOOTING TABLE (Continued)
42
Check LED lamp color. Red, AVC system - Check power supply at high
level? No change occurs.
Display -
The set... screen Start up .
Red (Faulty condition)
Display - No problem
No signal Signal
Check pins (5)
present
and (6) of both ...
Service Manual - Page 43
... peripherals.
It is possible that PC I/F unit (CPCi0040CE11) has internal problem. Check IC702, Q702, L701 and their peripherals as well as primary side of spec? TROUBLE SHOOTING TABLE (Continued)
LC-28HM2
AN-28SP2
No
Yes Is only 5V(D) output out of T701?
Replace F704 and F705. Is there short-circuit in loading
No
section...
Service Manual - Page 44
... is also possible that display has problem. Check the peripherals
of IC305. Yes
...level?
LC-28HM2
AN-28SP2
No sound from speaker
No sound
No sound from headphone
TROUBLE SHOOTING... TABLE (Continued)
44
Does output icon show Yes lineout when volume key is operated?
No
Monitor output in main menu is set video 3 to "variable". Switch it to "fixed" or set...
Service Manual - Page 62
...177; 0.5%)
3. indicates waveform check points (See chart, waveforms are set to chassis ground.)
INDICATION OF RESISTOR & CAPACITOR:
RESISTOR
1. C :...REPLACE THESE PARTS
WITH SPECIFIED ONES FOR MAINTAINING THE
SAFETY AND PERFORMANCE OF THE SET.
62
LC-28HM2
AN-28SP2
DESCRIPTION OF SCHEMATIC DIAGRAM
VOLTAGE MEASUREMENT CONDITION:
1. The unit of colour bar generator for service...
Service Manual - Page 123
Card
Packing Case Barcode Label Terminal Cover
Accessories Operation Manual Batteries Cable Clamp (4 pcs)
PACKING OF THE SET
Reinforcing Pad (Accessories)
LC-28HM2
AN-28SP2
AC Cord System Cable
Infrared R/C Unit
Polyethylene Bag
Wrapping Paper (Display)
Wrapping Paper (AVC)
Reinforcing Pad (Display)
FRONT
141
AVC System Reinforcing Pad (AVC) Buffer Material
No.
Service Manual - Page 124
LC-28HM2
AN-28SP2
OPTIONAL SYSTEMS
SPEAKER SYSTEM
MODEL AN-28SP2
OUTLINE
Speaker System for the LCD Monitor [Appropriate Model]
This speaker system is for exclusive use with model LC-28HM2
ACCESSORIES
Speaker system ... 1 Set
Speaker system fixing screws ... 4
Rear cover ... 2
Instruction
142
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