Sony DVP-NS305 Service Manual Download

Page: 70 / 108

6-4

6. AV Decoder

(6-2) 1935 RAM

Data write

read, and accord check

Error 13: AVD RAM read data discord
The program code data stored in ROM (IC107) are copied
to all areas of RAM (IC504, IC505) connected to the AVD
through the bus, then they are read and checked if they ac-
cord. Further, the same test is conducted once again with
the data where all bits are inverted between 1 and 0. If dis-
cord is detected, faulty address, written data, and read data
are displayed following the error code 13, and the test is
suspended.
During the test, OSD display becomes blank as the OSD
area is also checked.

(6-3) 1935 SP

ROM

AVD RAM

Video OUT

Error: Not detected.
The data including sub picture streams in ROM are trans-
ferred to the RAM in AVD, and output as video signals
from the AVD.
Though OSD display becomes blank, the output of video
signals continues until the key is pressed.

7. Video Output

(7-2) Color Bar

AVD color bar command write

Video OUT

Error: Not detected.
The command is transferred to the AVD, and the color bar
signals are output from video terminals.

(7-3) Composite Out (European model only)

EURO-AV video output check
AVD color bar command write

Video (EURO-AV) OUT

Error: Not detected.
With the component of video output turned off, the color
bar signals are output from the EURO-AV terminal.
This check is performed for European model only.

(7-4) Y/C Out (European model only)

Y/C video output check
AVD color bar command write

Video (Y/C) OUT

Error: Not detected.
With the Y/C of video output turned on, the color bar sig-
nals are output.
This check is performed for European model only.

(7-5) RGB Out (European model only)

RGB video output check
AVD color bar command write

Video (RGB) OUT

Error: Not detected.
With the RGB of video output turned on, the color bar sig-
nals are output.
This check is performed for European model only.

(7-6) Component Out (European model only)

Component video output check
AVD color bar command write

Video (Component) OUT

Error: Not detected.
With the component of video output turned on, the color
bar signals are output.
This check is performed for European model only.

(7-7) Euro AV Through (European model only)

AV Through output On/Off
Error: Not detected.
AV Through output is turned on.
This check is performed for European model only.

8. Audio Output

(8-2) ARP

1935

Data flow from supply system DRAM to SDRAM of AV
Decoder is tested.
Error 14: ARP

1935 video NG

15: ARP

1935 audio NG

(8-3) Test Tone

Pink noise output
Error: Not detected.
In the models without DD output, the test tone is output
from L and R of 2-channel only, and in the models with
DD output, the test tone is output from L and R of 2-chan-
nel, and all channels of 5.1 output.
After turning on all outputs, each time the

[NEXT]

key is

pressed, the output channel is switched for individual chan-
nel checking.

Diagnosis Check Items List

2. Version Display

(2-2) Revision
(2-3) ROM Check Sum
(2-4) Model Type
(2-5) Region
(2-6) M’t Check

3. Peripheral

(3-2) EEPROM Check
(3-3) Gate Array Check
(3-4) NAND FLASH Check (NAND Flash installed model only)
(3-5) SACD Check (SACD decoder installed model only)
(3-6) Venc Check (Video encoder installed model only)
(3-7) ———— (Function not supported)
(3-8) External RAM Check (External RAM installed model only)

4. Servo

(4-2) Servo DSP Check
(4-3) ———— (Function not supported)
(4-4) RF Amp Register Check

5. Data Supply System

(5-2) ARP Register Check
(5-3) ARP to RAM Data Bus
(5-4) ARP to RAM Address Bus
(5-5) ARP RAM Check