Philips SCOPEMETER PM93 Service Manual page 153

7 - 24 CORRECTIVE MAINTENANCE
Comp Name Scope
Freq.
Data Description
Circ/IC H/UA
50 V6N6 0 H Power supply for LCD drive
5 X26/X26 34.7 Hz A Liquid crystal driver output 5
X106/X26
-n-----[-I II
----rr--
X186/X26
21 X10/X10 34.7 Hz A Liquid crystal driver output 21
X90/X10
-11
-----[1
II
-----lr---
X170/X10
55 X76/X76 34.7 Hz A Liquid crystal driver output 55
X156/X76
-ITlJTLlj-
X236/X76
79 X52/X52
JVl.jl
34.7 Hz A Liquid crystal driver output 79
X132/X52
X212/X52
96 X35/X35 34.7 Hz A Liquid crystal driver output 96
X115/X35
-n-- --[ -I II
---rr--
X195/X35
Table 7.5 Signals measured on display drivers 01404106107
Logic O=OV Logic 1 =+5V
Comp Name Scope Freq. Data Description
Circ/IC H/UA
01404/01406/01407
~
- -
- - - - - - - - - - - - - - - -
31
-20V NEE
0
H Power supply (-20V)
32 V1 N1 t _____________________ 0 H Power supply for LCD drive
- - - - - - - - - -
r------------
- - - - - - - - - - - - - -
33
V2N2 0 H Power supply for LCD drive
r
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
34 V3N3 0 H Power supply for LCD drive
35 V4N4
~
-
-- -- - -- -
-
-- - -- - - - -- - -
-
- - - -- - ---
0 H Power supply for LCD drive
36
/GND 0 L GROUND (OV)
37 LlNECUCL 1
--~---
16.7 kHz UA LINE CLock/Latch Clock 1
l ____________________
38 /SHL 0 H .. .ISHift direction
- - - - - - - - - -
39
DATACUCL2
_nrLJlILI __
833 kHz
A .. .Ishift CLock 2
40 NC 0 L Not Connected
41 00/03
--~
16.7 kHz A