Adjustment Tools; Timing Table; Definition For Normal Condition; B+ Adjustment - NEC N9902 F-1 Service Manual

(1) Adjustment tools:

(A) Color Analyzer
(C) Multi meter
(E) Convergence Meter
(G) Power Meter
(I) DDC test fixture
(2) TIMING TABLE(FACTORY MODE -14 MODES)
MODE RESOLUTION
1 VGA400
2 VGA640*480
3 640*480(75)
4 640*480(85)
5 800*600(75)
MAC ¢º 50K
6
7 800*600(85)
8 1024*768(75)
9 1280*1024(60)
10 1024*768(85)
11 1280*1024(75)
12 1280*1024(85)
13 1600*1200(75)
14 1024*768(60)
15 Free run Adj.
16 H.CENTERING,EHT

(3) Definition for Normal Condition:

(A) INPUT AC VOLTAGE 110V/50HZ.
(B) WARM UP TIME 30 MINUTES.
(C) CROSSHATCH PATTERN.
(D) ALL VR ADJ CENTER.
(E) CRT FACE TO EAST DIRECTION
(F) COLOR TEMP 9300K

(4) B+ Adjustment:

(A) MODE: 60kHz 1240*768(75)
(B) PATTERN: CROSSHATCH
(C) Adjustment: Adjust VR102 to make the cathode of D112 has 14.9V+0.1V on cathode.
(D) CHECK: CHECK OTHER POWER SOURCE should be 82+2V,7.0+0.3V,
47V+2V,-12.1V+0.5V.
N9902 Adjustment Specifications
(B) CHAROMA 2135 or Function Generator
(D) Hi-Pot Probe
(F) Degauss Probe
(H) Automatic Alignment System
H-SYNC EREQ. V-SYNC FREQ H . POLARITY V . POLARITY
31.4kHz 70Hz
31.4kHz 60Hz
37.5kHz 75Hz
43.2kHz 85Hz
46.8kHz 75Hz
49.7kHz 75Hz
53.6kHz 85Hz
60.0kHz 75Hz
64.0kHz 60Hz
68.6kHz 85Hz
79.9kHz 75Hz
91.1kHz 85Hz
93.7kHz 75Hz
48.3kHz 60Hz
30.0kHz 69Hz
90.1kHz 85Hz
7
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