Sony HCD-C700 Service Manual page 21

6. AV Decoder
(6-2) 1930 RAM
Data write read, and accord check
Error 13: AVD RAM read data discord
The program code data stored in ROM (IC107 or IC108)
are copied to all areas oo»RAM (IC504, IC505) connected
to the AVD (IC503) through the bus, then they are read and
checked if they accord. Further, the same test is conducted
once again with the data where all bits are inverted between
1 and 0. If discord is detected, faulty address, written data,
and read data are displayed following the error code 13,
and the test is suspended.
(6-3) 1930 SP
ROM AVD RAM
Error: Not detected.
The data including sub picture streams in ROM (IC107 or
IC108) are transferred to the RAM (IC504, IC505) in AVD
(IC503), and output as video signals from the AVD (IC503).
They are output from all video terminals (Composite, Y/C).
7. Video
(7-2) Color Bar
AVD color bar command write
Error: Not detected.
The command is transferred to the AVD, and the color bar
signals are output from video terminals.
They are output from all video terminals (Composite, Y/C).
(7-3) Composit Out
(7-4) Y/C Out
(7-6) Component Out
8. Audio
(8-2) ARP 1930
Error 14 : ARP
15 : ARP
(8-3) Test Tone
All channels
2ch Left
2ch Right
Front Left
Front Right
Rear Left
Rear Right
Center
Sub Woofer
9. DSD Decoder
(9-2) 2752 ID Chack
(9-3) 2752 RAM Check
Video OUT
Video OUT
1930 video NG
1930 audio NG
Check Items List
2) Version
(2-2) Revision
(2-3) ROM Check Sum
(2-4) Model Type
(2-5) Region
3) Peripheral
(3-2) EEPROM Check
4) Servo
(4-2) Servo DSP Check
(4-3) DSP Driver Test
5) Supply
(5-2) ARP Register Check
(5-3) ARP to RAM Data Bus
(5-4) ARP to RAM Address Bus
(5-5) ARP RAM Check
6) AV Decoder
(6-2) 1930 RAM
(6-3) 1930 SP
7) Video
(7-2) Color Bar
(7-3) Composit Out
(7-4) Y/C Out
(7-6) Component Out
8) Audio
(8-2) ARP 1930
(8-3) Test Tone
9) DSD Decoder
(9-2) 2752 ID Check
(9-3) 2752 RAM Check
Error Codes List
00: Error not detected
01: RAM write/read data discord
02: Gate array NG
03: EEPROM NG
08: ARP register read data discord
09: ARP RAM data bus error
10: ARP RAM address bus error
11: ARP RAM read data discord
12: Servo DSP NG
13: 1930 SDRAM NG
14: ARP 1930 video NG
15: ARP 1930 audio NG
16: 1910 UCODE download NG
17: System call error (function not supported)
18: System call error (parameter error)
19: System call error (illegal ID number)
20: System call error (time out)
90: Error occurred
91: User verification NG
92: Diagnosis cancelled
HCD-C700/C900
21