akira CT-21CDP5CP, Service Manual

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Model no.: .CT-21CDP5CP.doc
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42
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