Self-Diagnosis Function - Pioneer DV-S755AI Service Manual

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7.1.4 SELF-DIAGNOSIS FUNCTION

When enter the service mode, self diagnosis mode operates with the "ESC"+"CHP/TIM" keys automatically.
1 Mechanism Error History (past eight times of error is displayed)
Two columns of the beginning display the error status for mechanism controller.
(the details of error contents refer to "7.1.6 Error Display".)
Eight columns of the back display the count UP value (turned count up every 20msec) from the power-up.
Example) 32h ⋅ = . 1 sec, BB8h ⋅ = . 1 min, 2BF20h ⋅ = . 1 hour
In addition, when there was error after power-up immediately (till initial setting is completed), turn the most significant bit to ON.
2 Check Item Display of Self Diagnosis Function
a) AV1 Host Bus check (possible the check only during stop) (Read & Write process of an internal specific register)
AV_1 : OK
: −−
: HOST BUS NG
b) Bus check between AV1 SDRAM (possible the check only during stop) (Read & Write process to the SDRAM)
AV_2 : OK
: −−
: AV1-SDRAM BUS NG ⇒ Bus NG between AV1 and SDRAM
c) DMA transfer port check from F.E. to AV1 (during stop, possible the check only in DVD or NO DISC)
(writing from F.E to SDRAM and reading of SDRAM)
AV_3 : OK
: −−
: FE-AV1 DMA NG
d) Video encoder (ADV∗∗∗∗) check (Read of the specific register)
VE : OK
: NG ADV,
: NG > ADV,
: NG > PRO
e) DSP check (Read of the specific register)
DSP : OK
: NG
f) SACD check (Read of the specific register)
SACD : OK
: NG
g) 1394 relation HOST controller check
HOST : OK
: NG
h) 1394 relation Mercury CHIP check
MERC : OK
: NG
Display the mechanism error history and self diagnosis result by pressing the "CHP / TIM" key once again.
Afterwards press the "CHP / TIM" key with toggle and change the display.
5
6
⇒ not yet check
⇒ HOST bus NG
⇒ not yet check
⇒ not yet check
⇒ Bus NG between F.E and SDRAM installed outside of AV1
⇒ ADV register reading NG
⇒ ADV communication NG of FR to video encoder
⇒ Communication NG from EBY to progressive decoder
⇒ DASP NG
⇒ SACD NG
⇒ HOST controller NG
⇒ Mercury CHIP NG
Display screen of mechanism error history and self diagnosis result
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6
7
DV-757Ai
7
8
(a)
(b)
(c)
(d)
2
(e)
(f)
(g)
(h)
8
A
B
C
D
E
F
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