MITSUI MTV-DV05, Руководство по обслуживанию

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SERVICE MANUAL
Table 11 Functions and Service Data of LM7805 (N503)’s Pins
DT890D Digital Multimeter
Ground Resistance ( Ω )
Pin
No.
Function Description
Voltage of
Pin (V)
Measure with red
probe while
grounding black
probe.
Measure with black
probe while
grounding red
probe.
1
Input terminal
15 865 477
2
Regulation output
5 1015 477
3
Ground
0 0 477
Table 12 Functions and Service Data of TDA9808T Pins
Digital Multimeter
Pin No. Function Description
Reference
Voltage (V)
Positive
Resistance (20K Ω )
Negative
Resistance(20K Ω )
1 PIF signal input 1 3.23 7.2 6.03
2 PIF signal input 2 3.23 7.2 5.99
3 RFAGC start-control level adjust 0.99 6.7 5.85
4 PLL APC filter 2.53 7.9 6.3
5 Audio AGC filter 3.29 7.8 6.17
6 Audio output (NTSC 4.5MHz) 2.34 7.2 5.86
7 Filter 1.79 7.9 6.29
8 1/2VCC comparison voltage bias 0 ∞ ∞
9 Video output 2.18 7.6 6.09
10 Second SIF signal output 2.03 7.7 6.17
11 Second SIF signal input 2.81 5.2 4.99
12 RFAGC output 0.04 6.1
13 AGC signal output 3.05 7.9 6.2
14 External connection for VCO oscillating LC network 2.76 7 6
15 External connection for VCO oscillating LC network 2.76 7 6
16 Ground 0 0.001 0.00
17 AGC filter 3.13 7.9 6.11
18 Supply voltage input terminal 8 2.1 2.7
19 SIF signal input 3.2 2.1 6.27
20 SIF signal input? 3.2 7 6.27
Table 13 Functions and Service Data of MSP3410G Pins
Digital Multimeter
Pin No. Function Description
Reference Voltage
(V)
Positive Resistance
(20K Ω )
Negative Resistance
(20K Ω )
1 TP NC 0.16 7.3 5.3
2 AVD-GL-OUT NC 2.52 6.8 5.51
3 D-CTR-I/O-1 NC 0.01 7.3 5.57
4 D-CTR-I/O-0 NC 0.01 7.2 5.58
5 ADR-SEL 4.79 0.7 4.54
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