Rolsen 14C13, Руководство по обслуживанию, Страница: 37 / 41

SERVICE MANUAL
35
4. KEY ICS SERVICE DATA
Table 3 Functions and Service Data of TD7056B (N600B)’s Pins
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 - -
6 Ground 0 0 0
7 Ground 0 0 0
8 Ground 0 0 0.
9 Control signal input 0.03 13.5 13.1
(continued)
Digital Multimeter Pin
No.
Function Description
Reference Voltage (V) Positive Resistance (20K
Ω
) Negative Resistance (20K
Ω
)
1 Not connected 0
∞ ∞
2 Positive supply voltage 16 0.4 0.4
3 Voltage input 2 7.4 33
4 Signal ground 0 0 0
5 DC volume control 0 7 9
6 Positive output 8 6 7.4
7 Power ground 0 0 0
8 Negative output 8 6 7.4
9 Not connected 0
∞ ∞