Service manual

SERVICE MANUAL
IC DATA AND WAVEFORMS OF KEY POINTS
(continued)
23 C OUT 3.83 1.2 1.39
24 BIAS2 1.7 6.8 5.92
25 Y OUT 3.54 1.2 1.39
26 VREF1 2.88 0.7 4.89
27 VDD4 4.83 0.7 0.91
28 VSS4 0.01 0.001 0.00
Table 14 Functions and Service Data of MM1031x5 (NK03)’s Pins
Digital Multimeter
Pin No. Function Description
Reference Voltage(V)
Positive Resistance
(20K
)
Negative Resistance
(20K )
1
Video signal amplification 2.08 7 5.6
2
Build-in clamp circuit 0.01 0.001 0.00
3
Build-in 75 drive 0
4
Current consumption 2.3 6.7 5.93
5
Supply voltage 4.83 0.7 0.91
Table 15 Each Electrode Voltage of Key Triodes
Description DC Voltage(V)
Serial No. Parts Base Collector Emitter
V001 C1851Y
0.03 4.69 0.01
V002 C1851Y
0.13 4.12 0.01
V104 C388A
2.04 7.87 1.28
V227 C1851Y
2.53 12.09 1.9
V432 BSN274
0.550 26.74 0.01
V433 BU2720DF
0 100 0
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