Digital Equipment 21BM18, Руководство по обслуживанию, Страница: 39 / 51

SERVICE MANUAL
3
7
4. KEY ICS SERVICE DATA
Table 3 Function and Service Data of TDA7057AQ (N600)’s Pins
Digital Multimeter : Victor DT890D
Pin
No.
Function description
Reference
Voltage (V)
Positive
Resistance
(K Ω )
Nerative
Resistance
(K Ω )
1 Vertical drive input (positive) 7.5 22.6 18.6
2 Vertical drive input (negative) 0 0 0.
3 Feedback input 7.5 22.6 18.6
4 Supply voltage 7.5 22.6 18.6
5 Output 1 0 0 0
6 Not connected 7.5 22.6 18.6
7 Ground 0.8 8.7 8.8
8 Pump supply voltage input 0 0 0.
9 Output 1 2.4 54.7 23.6
10 Guard output 16.0 2.4 2.4
11 Pincushion output 2.4 55.1 23.6
12 Pincushion input (negative) 0 - -
13 Pincushion input (positive) 0.8 9.0 8.8
Table 4 Function and Service Data of TDA8356 (N401)’s Pins
Digital Multimeter : Victor DT890D
Pin
No.
Symbol
Reference
Voltage (V)
Positive
Resistance
(K
Ω
)
Nerative
Resistance
(K
Ω
)
1
Idrive (pos)
2.4 27.7 20.3
2
Idrive (neg)
2.4 27.7 20.4.
3
VP
15.4 26.3 13.5
4
VO (B)
7.7 6.1 6.1
5
GND
0 0 0
6
VFB
45.0 113.3 13.7
7
VO (A)
7.5 6.1 6.1
8
VO(guard)
0.2 10.0 9.7.
9
VI(fb)
7.7 6.1 6.1
Table 5 Function and Service Data of HEF4053BP (N402)’s Pins
Digital Multimeter : Victor DT890D
Pin
No.
Function description
Reference
Voltage (V)
Positive
Resistance
(K
Ω
)
Nerative
Resistance
(K
Ω
)
1 Signal input 3.0 22.2 47.0
2 Signal input 3.9 22.2 47.0.
3 Signal input 1.3 21.2 40.0
4 Signal output 2.5 0 0
5 Signal input 2.4 - -
(continued)