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Service manual SP-110
6-3. X-SUSTAIN BOARD
1. Separate PA7 and PA114 connector
2. Check the remaining electrical voltage of PA7
(1) Check the Voltage of Terminal 170V : If maintained beyond 10 volt, discharge (below 5 volt)
with resistance of beyond 1K ohm 5 Watt
3. Confirm the value of series and parallel resistance of RU10//RU13-RU11//RU14-RU12//RU15
(1) Each value of resistance : 6.8 ohm 5 Watt
(2) The total value of resistance : 10.2 +/- 0.5 ohm
(3) In case of wrong value of resistance, replace (open) board and confirm each connector
: the state of insertion ( installation )
4. In case of normal value of resistance, measure the value as following table1.
(1) Use a Diode Tester
(2) If abnormal part is found, replace the board
(3) In case of normal state, Inspect connectors and other boards
Table 1. PA7 The value of Diode Tester of each terminal
* + : red, - : black
NAME
DIODE
MEASURE
DIODE
MEASURE
TESTER
TESTER
1
170V
+
About 5 sec.
-
0.49
GND
-
Later,
+
Open
2
15V
+
About 3 sec.
-
0.47
GND
-
Later,
+
Open beyond 2V
3
CU1(5V)
+
Beyond 1.43
-
0.48
GND
-
+
Table 2. PA114 The value of Diode Tester of each terminal
* + : red, - : black
The configuration of terminal ( top view, components side )
Summary of Contents for DSP-4210GM
Page 1: ...Model DSP 4210GM CHASSIS SP 110 S M No TSP110AEF0 Service Manual DAEWOO ELECTRONICS CO LTD...
Page 7: ...3 BLOCK DIAGRAM...
Page 12: ...6 1 Audio Video...
Page 13: ...IMAGE PROCESSOR PART BLOCK DIAGRAM...
Page 21: ......
Page 30: ...29 Service manual SP 110 E N D Replace POWER Module NO...
Page 32: ...8 Block Diagram 8 1 VIDEO AUDIO...
Page 33: ...8 2 Digital...
Page 34: ...8 3 Y Sustain Y Sustain Block Diagram...
Page 35: ...8 4 X Sustain X Sustain Block Diagram...
Page 36: ......