Service Procedure; Control - Akai DVLX44C1 Service Manual

5
Rear ProJOC:Uon TV SeMce Manual
Afte r the test equipment in the test environment is connected to the DVLX4xCx and the 110 VAC power
is applied to th e DVLX4xCx, the lest procedure proceeds as described in the following sections.
Service Procedure
Table 2 is a service checklist showing Ihe most typical repair scenarios when the UUT is capable of
functioning normally but with degraded operation; i.e., is exhibiting problems while functioning as a TV
Table 2 lists typical problem symptoms, possible causes, and remedy actions. If the problem still pe mists
after fo llowing the test checklist remedy actions or if the UUT is incapa ble of functioning as a TV, th en
you need to proceed directly to the detailed Service Procedure, which addresses a more complete set of
repair scenarios. A flowchart of the detailed Service Procedure is shown in Figure 6 through Figure 8.
The references SP-A, SP-C, SP-C1, etc., identified in Table 2 correspond to specific positions in Ihe
flowchart. Table 3 provides further delails to speCific remedy actions shown in the flowchart. These
details are numbered SPN-1 through SPN-23 corresponding to the numbers in the flowch art for
identification wah speCific remedy actions.
Table 2: Service Checklist
Symptom Possible Problem Remedy Action
Reference
Image problems
o
Section 7
a Settings menu selection in the
Operational Software
LA MP LED on
• Reset to factory defaults • Configuration wrong
o
SPN-21
lifetime
Screen darker and
• Lamp exceeds rated • Replace Lamp
o
SPN-21
less clear
• Lamp exceeds rated • Replace Lamp
lifetime
IR malfunction,
• LED Board faun
i> Run Service Procedure first
o
SP-A
Keypad OK
o
SPN-12 • LED Board cable fault • If problem pemists, change
Power Supply.
IR
m a ~unction,
• Power Supply
• Control Board faun • First replace Control Board and • SPN-5
Keypad malfunction ACBL 14 cable.
• Control Board cable faun • SPN-12
• Power Supply • If problem persists, Replace
Power Supply
POWER LED not on
o
SP-A
• Video Board fault • Run Service Procedure
• Power Supply faun
• LED Board faun
• LED Board cable fault
Following inputs are
o
SPN-6
not available'
Component2
Video 2
S-Video 2
No image,
• Video Board fault • Replace Video Board
o
SPN-6
normal menu
Distorted image,
• Video Board fault
• Replace Video Board
o
SPN -5
normal menu
Distorted Image,
• Video Board fault
• Replace Video Board
o
SP-A
distorted menu
• LVDS cable connector
• Run Service Procedure.
J15 faun
;
• Video Board fault
• LVDS cable faun
• Opti cal Enqine fault
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DVLX Confident ial
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