Self Diagnostic Function; General Description; Trouble Criteria - Sony PFM-510A1WU Service Manual

4-2. Self Diagnostic Function

4-2-1. General Description

The self diagnostic function of this set comprises four
channels to detect analog voltage (160 V,60 V DC voltage
for panel drive, and 2 kinds of panel back side
temperature) using A/D converters, six channels of shift
registers to detect fan operations and power supply
temperature threshold values, digital 5 V detection and fan
control detection (microprocessor port). In case of an alarm
or trouble, it displays a "trouble code" on the service code
indicator in the power supply block, and also it blinks a
standby indictor on the control panel and displays the
detected data on the "STATUS" of the service menu.
Further, it performs the "shut down" operation forcibly if
an alarm status exceeds allowable value.
The detection items are as follows:
1. Detection of internal DC voltage 160 [V] rise and drop.
2. Detection of internal DC voltage 60 [V] rise and drop.
3. Detection of temperature rise at panel top on power
supply block side, and shut down.
4. Detection of temperature rise at panel top on input
terminal block side, and shut down.
5. Detection of fan operation stop.
*Three fans at panel top, and two fans for power
supply.
6. Fan control circuit alarm detection.
7. Detection of temperature rise in power supply block.
8. Shut down by faulty 5 [V] for internal digital circuits.
9. Detection of EEPROM trouble
10. PDP trouble diagnosis by combining voltage
detections, and shout down.
4-2

4-2-2. Trouble Criteria

1. Internal DC voltage 160 [V] rise and drop
(Service menu function name: DC 160 V)
Normal range is reference voltage 160 [V] ± 32 [V].
High voltage warning for more than 192 [V].
Low voltage warning for less than 128 [V].
2. Internal DC voltage 60 [V] rise and drop
(Service menu function name: DC 60 V)
Normal range is reference voltage 60 [V] ± 15 [V].
High voltage warning for more than 75 [V].
Low voltage warning for less than 45 [V].
3. Temperature rise at PDP panel back side top on power
supply block side
(Service menu function name: PTEMP1)
Normal range is up to 58 [dC].
High temp. warning for more than 59 [dC].
Shut down for more than 68 [dC].
4. Temperature rise at PDP panel back side top on input
terminal block side
(Service menu function name: P TEMP2)
Normal range is up to 54 [dC].
High temp. warning for more than 55 [dC].
Shut down for more than 64 [dC].
5. Cooling fan motor stop
(Service menu function name: FAN)
In the service menu STATUS, each fan status is
displayed with "L" or "H".
F A N : L L L L L
. Set back side top center Service code [55]
. Set back side top on
power supply side
. Set back side top on
input terminal side
. Power supply block
(2 pcs)
OSD display ...... L for normal, or H for abnormal (stop)
Service code [11]
Service code [12]
Service code [21]
Service code [22]
Service code [31]
Service code [39]
Service code [41]
Service code [49]
Service code [54]
Service code [53]
Service code [52]
or [51]
PFM-510A1WU/PFM-510A1WE