Pioneer PDP-5050SX Service Manual page 140

1
3. When a repaired DIGITAL VIDEO Assy is mounted on the original unit (reuse of the repaired DIGITAL VIDEO Assy)
A
Changing of keywords is not required. After the repaired DIGITAL VIDEO Assy is mounted in the original unit, the unit can operate with
its latest adjustment values.
4. When both the DIGITAL VIDEO Assy and MAIN BOARD Assy are simultaneously replaced with other assemblies
The automatic backup function of this unit will not work properly.
Note 2: Readjustment of the main unit is required.
Note 3: After readjustment of the main unit, send the "FAJ" RS-232C command to change the keyword of the DIGITAL VIDEO Assy to
"adjusted." Thus, when the unit is turned off, automatic backup of adjustment data is performed properly.
Note 4: If readjustment of the main unit is totally impossible, it can be omitted by installing the EEPROM (IC5206, 4 kbits) originally mounted
on the DIGITAL VIDEO Assy for service.
B
Automatic backup operations in Service/Factory mode
[Status confirmation]
Display the screen page shown below to check if the DIGITAL VIDEO Assy has been adjusted or a new service part might have been
installed without adjustment being performed, and if the adjustment values have been stored in the backup ROM.
If the DIGITAL VIDEO Assy has not been adjusted (NG), the red LED lights, and the green LED flashes at intervals of 200 ms. In such a
case, be sure to download the data from the backup ROM.
C
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
1
I N F O R M A T I O N
2
3
D I G I T A L
4
5
6 A D J U S T
B A C K
7
8
9
10
11
12
13
14
15
16
D
[Downloading the adjustment data from the backup ROM]
(Required after the DIGITAL VIDEO Assy is replaced)
After the DIGITAL VIDEO Assy is replaced, enter Service/Factory mode to copy the data from the backup ROM. Display the screen
page shown above after entering Service/Factory mode then press the Enter key. The indication below is displayed. Move the cursor to
YES then press the Enter key to start copying the data from the backup ROM to the new DIGITAL VIDEO Assy.
Note: Be sure to perform this operation when the DIGITAL VIDEO Assy is replaced with a new service part.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
1
I N F O R M A T I O N
2
E
3
D I G I T A L
4
5
6
7
8
9
10
11
12
13
14
15
16
F
140
1
2
V D 1 – 1 3 1 – N T V – A T O
E E P R OM
: N G
U P : O K
V D 1 – 1 3 1 – N T V – A T O
E E P R OM
D A T A T R A N S F E R
Y E S N O
2
3
?
PDP-5050SX
3
4
4