Sony DVP-M35 Service Manual ▷ View online
5-2
5-2-1. Selection of Check Items
The desired check item can be selected when Model No. is being displayed. When any numeric key is pressed, diagnosis of the selected item
is performed. When any key other than the numeric key is pressed, all item test is selected.
is performed. When any key other than the numeric key is pressed, all item test is selected.
5-2-1-1. Testing the Selected Item
The main menu is not displayed. Therefore, select any desired item number from the item list. Enter the four-digit selected number that
consists of the two digits of the main item number and two digits of sub item number totaling the four digits, using numeric keys of the
remote commander microprocessor. When the first digit is entered, the item selection submenu appears. Enter the remaining three digits,
and press [ENTER]. When an item is selected, the detailed test is performed. When RAM test is selected, the selected RAM is tested twice
after changing data of all addresses.
consists of the two digits of the main item number and two digits of sub item number totaling the four digits, using numeric keys of the
remote commander microprocessor. When the first digit is entered, the item selection submenu appears. Enter the remaining three digits,
and press [ENTER]. When an item is selected, the detailed test is performed. When RAM test is selected, the selected RAM is tested twice
after changing data of all addresses.
< Example > Select the item 2-2 ROM Check.
Input “0202” because the item number is <2-2>.
Syscon Diagnosis
IF con Ver. 1. 220 (9315)
SYScon Ver. 1. 000 (0000)
Select Diag No. ; 0 -
** Press Remocon Key **
SIRCS:FF KEY:FF
Syscon Diagnosis
IF con Ver. 1. 220 (9315)
SYScon Ver. 1. 000 (0000)
Select Diag No. ; 02 -
** Press Remocon Key **
SIRCS:FF KEY:FF
Syscon Diagnosis
IF con Ver. 1. 220 (9315)
SYScon Ver. 1. 000 (0000)
Select Sub No. ; 02-0
** Press Remocon Key **
SIRCS:FF KEY:FF
←
Enter item number [0]
←
Enter item number [02]
←
Enter item number [020]
5-3
When an wrong item number is entered by mistake, it can be cleared by pressing the [CLEAR] key. When [CLEAR] is pressed, the selected
number is cleared. Enter a correct number. When [ENTER] is pressed, diagnosis of the selected number only is executed and its result
appears.
number is cleared. Enter a correct number. When [ENTER] is pressed, diagnosis of the selected number only is executed and its result
appears.
When any key is pressed while the diagnosis result is flashing, the system returns to the initial display of the self diagnosis. When the
diagnosis which needs visual check such as STILL picture check, or when errors occur, press the [PREV] key to repeat checking. Press
[NEXT] to advance to the next step.
If self diagnosis of the selected number does not exist, the system returns to the initial display when [ENTER] is pressed.
diagnosis which needs visual check such as STILL picture check, or when errors occur, press the [PREV] key to repeat checking. Press
[NEXT] to advance to the next step.
If self diagnosis of the selected number does not exist, the system returns to the initial display when [ENTER] is pressed.
5-2-1-2. Testing All Items
When any key other than the numeric keys is pressed while Model No. is being displayed, testing of all items is selected.
“Testing All Items” is the simple check omitting the RAM check. In practice, the selected blocks only are tested at interval such as 0-ff, 500-
5ff, a00-aff, f00-fff, 1400-14ff, ...(address). Test is executed sequentially from the top of the check item list of the diagnosis. If errors which
require visual inspection, do not occur, the system advances to the next test step. W hen errors occur, press the [PREV] key to repeat
checking. When errors occur or confirmation is necessary, press the [PREV] key to repeat checking of the specified item. Press [NEXT] to
advance to the next step.
“Testing All Items” is the simple check omitting the RAM check. In practice, the selected blocks only are tested at interval such as 0-ff, 500-
5ff, a00-aff, f00-fff, 1400-14ff, ...(address). Test is executed sequentially from the top of the check item list of the diagnosis. If errors which
require visual inspection, do not occur, the system advances to the next test step. W hen errors occur, press the [PREV] key to repeat
checking. When errors occur or confirmation is necessary, press the [PREV] key to repeat checking of the specified item. Press [NEXT] to
advance to the next step.
5-2-2. Error Display
When errors occur, error code and information are displayed as follows.
Syscon Diagnosis
IF con Ver. 1. 220 (9315)
SYScon Ver. 1. 000 (0000)
Select Sub No. ; 02-02
** Press Remocon Key **
SIRCS:FF KEY:FF
←
Enter item number [0202]
Syscon Diagnosis
IF con Ver. 1. 220 (9315)
SYScon Ver. 1. 000 (62ED)
RAM Check
Error code: 05
Address : 01001D87
Write Data: 20
Read Data: FF
SIRCS:FF KEY:FF
When error code is other than “05” (Write data and read data do not agree.), the address column and the data column are set to 0.
When all steps of test have completed or the test is suspended, the message “Diag OK” or “Diag Error End” flashes. Press any to return to
the initial menu of the test mode.
the initial menu of the test mode.
←
Name of check item
←
Error code
←
Error occurring address
←
Write data (2 to 8 digits)
←
Read data (2 to 8 digits)
5-4
5-2-3. Diagnosis Check Item List
* The item number (1) and the item number (x-1) means all item check.
(2) Memory
(2-2)
ROM check
(2-3)
RAM check (DMA is used)
(3) Destination setting
(3-2)
Destination setting check
(4) Gate array (62000CFh: Peripheral Access Control)
(4-2)
Register
(4-3)
Reset line
(5) Drive block
(5-2)
EPROM (serial)
(5-3)
SSI (serial)
(5-4)
Servo DSP download
(5-5)
Servo DSP register
(5-6)
Servo DSP reset line
(6) Data supply block
(6-2)
ARP register
(6-3)
ARP reset line
(6-4)
ARP DRAM
(6-5)
ARP interrupt line
(6-6)
Decrypt IC register
(6-7)
Decrypt IC reset
(6-8)
Decrypt IC interrupt line
(6-9)
Reserve data top byte read
(7) AV decoder
(7-2)
64020/64021 register
(7-3)
64020/64021 reset line
(7-4)
64020/64021 DREQ signal line
(7-5)
64020/64021 DRAM
(7-6)
Connection from ARP to 64020/64021
(7-7)
64020/64021 interrupt line
(7-8)
AV decoder revision check
(8) Video consumer related items
(8-2)
1914 (serial)
(8-3)
1914 Read
(8-4)
1914 Vertical sync
(8-5)
Still picture output (Direct write into DRAM)
(8-6)
Still picture output (Through ARP)
(8-7)
DNR (serial)
(8-8)
S-terminal DC check
(8-9)
EURO-AV output check (EURO model only)
(8-10)
Y/C output check (EURO model only)
(8-11)
RGB output check (EURO model only)
(8-12)
AV CONT Wide Mode check (EURO model only)
(8-13)
AV CONT Through check (EURO model only)
(9) Audio related items
(9-2)
Sampling frequency: 44.1 kHz
(9-3)
Sampling frequency: 48 kHz
(9-4)
Sampling frequency: 96 kHz
(9-5)
Audio digital output
(9-6)
Audio digital mute
(9-7)
MPEG audio analog output
(9-8)
Dual DAC (serial)
(9-9)
Audio mute line
(9-10)
MGA 16-bit
→
24-bit conversion
(DD, KARAOKE models only)
(9-11)
MGA - DCS selector switch check (DD model only)
(9-12)
MGA - KARAOKE selector switch check
(KARAOKE model only)
(KARAOKE model only)
(10) AC-3 related items [The supported models only]
(10-2)
AC-3 DSP register (DD model only)
(10-3)
AC-3 DSP Reset line (DD model only)
(10-4)
AC-3 DSP download (serial) (DD model only)
(10-5)
AC-3 DSP SRAM check (DD model only)
(10-6)
AC-3 DSP test tone (DD model only)
(10-7)
AC-3 audio output (DD model only)
(10-8)
Analog gain switch check (DD model only)
(10-9)
AC-3 DAC (serial) (DD model only)
(10-10) AC-3 to 2 ch (DCS path) (DD model only)
(11) KARAOKE related items [The supported models only]
(11-2)
KARAOKE DSP register (KARAOKE model only)
(11-3)
KARAOKE DSP Reset line
(KARAOKE model only)
(11-4)
KARAOKE DSP (serial) (KARAOKE model only)
(11-5)
Sound effect IC (KARAOKE model only)
(11-6)
KARAOKE AC-3 (KARAOKE model only)
5-5
5-2-4. Brief Description of Check Procedures
The diagnostic check procedures of each item are briefly describes in the order of menu.
(2) Memory
(2-2) ROM check
Checksum calculation
Error: Error is not detected.
Checksum calculation
Error: Error is not detected.
8-bit data is added to the respective addresses of ROM starting from 0x00000 to 0xfffff. Result of the calculation is displayed in
hexadecimal number using 4 digits. Error is not detected. Compare the calculated values with the default values.
hexadecimal number using 4 digits. Error is not detected. Compare the calculated values with the default values.
(2-3) RAM check (DMA is used)
ROM
ROM
→
RAM check (DMA): Check if read/write data agree.
Error
05: Write and read data do not agree.
Data of external RAM of SH is saved to stack in units of 256 bytes. After transferring the ROM data to DMA, the ROM data is read out
from DMA and compared with the ROM data in units of one byte. When the more detailed check is selected, the read-out data is bit-
inverted which is written and checked again.
During when checking is being performed, all interrupts are stopped. In addition to it, the variables use stack only including saving area
and bit inversion buffer. Because all processings are performed within this function, DAM is used for all processings including data
transfer with the stack area. When the more detailed check is selected, all areas are checked twice using the inverted data.
However, when one block is checked, the succeeding four blocks are not checked in the simple check. The check using the inverted
data, is also not performed in the simple check. If write data and read data do not agree., check can be repeated.
from DMA and compared with the ROM data in units of one byte. When the more detailed check is selected, the read-out data is bit-
inverted which is written and checked again.
During when checking is being performed, all interrupts are stopped. In addition to it, the variables use stack only including saving area
and bit inversion buffer. Because all processings are performed within this function, DAM is used for all processings including data
transfer with the stack area. When the more detailed check is selected, all areas are checked twice using the inverted data.
However, when one block is checked, the succeeding four blocks are not checked in the simple check. The check using the inverted
data, is also not performed in the simple check. If write data and read data do not agree., check can be repeated.
(3) Destination setting
(3-2) Destination setting check
I/O port reading
Error: Error is not detected.
I/O port reading
Error: Error is not detected.
Data of the destination setting port (I/O) is read and displayed in hexadecimal number.
Error is not detected
Error is not detected
(4) Gate array (62000CFh: Peripheral Access Control)
(4-2) Register
Data write
Data write
→
Data read Check if data agrees
Error
05: Write data and read data do not agree.
Register (Peripheral Access Control) of adrs = 62000CFh
The “Data write-then-read agreement check” is performed. If write and read data do not agree., check can be repeated.
The “Data write-then-read agreement check” is performed. If write and read data do not agree., check can be repeated.
(4-3) Reset line
Data write
Data write
→
Resetting hardware
→
Data read
Error
02: Reset error
Data 0xff is written into the register (Peripheral Access Control) of adrs = 62000CFh. Then check to see that the register is initialized to
“0x00” by reset pulse.
“0x00” by reset pulse.
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