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Version: 1PM044C2
Date:Feb.26.2007




SERVICE MANUAL



ACT-7H
TRANSMITTER
EQUIPMENT DESCRIPTION


SPECIFICATIONS FOR ACT-7H TRANSMITTER

ITEM SPECIFICATIONS

1. FREQUENCY RANGE 620MHz~950MHz

2. FREQUENCY GENERATION Phase Locked Loop (PLL) technique

3. SWITCHING BANDWIDTH 24MHz

4. CHANNEL GRID 25KHz

5. FREQUENCY STABLE ¡Ó .005% 0¢J~ +50¢J
0

6. MODULATION FM

7. RF OUTPUT POWER (50 OHMS LOAD) <50mW

8. SPURIOUS EMISSION <4nW

9. NOMINAL DEVIATION ¡Ó 0KHz
4

10. AUDIO FREQUENCY RANGE 80~18,000Hz

11. DISTORTION <0.3%

(AT 1KHZ AND NOMINAL DEV)

12. PRE-EMPHASIS 25uS

13. BATTERY AA3(1.5V) ¡Ñ
2

14. CURRENT CONSUMPTION Approx. 80mA

15. OPERATION VOLTAGE 1.9V~3V

16. ANTENNA Build in Antenna

17. DIMENSION (M/M) 50(D)¡Ñ 65(L)
2

18. WEIGHTS Approx. 270g

19. ENVIRONMENTAL Full SPECS -10 to 60 ¢J




ACT7HI01A
ASSEMBLY
BLOCK DIAGRAM
L8
+6.2V
+5V
R29 R30
C117 C36
C43 C17




2
Z5
R11
3
R27
R7 R28
C12 RF-POWER
1 Q7
C62 Q6




1
R145
R2 C114 C42 C37
R12 R16 C25 L7
C13

C22 R19
C38 L11
C34 ANT1




4
R4 C32 R26 3 2
R3 U5B R20 C31 R22 L6
3 L4 L5




1
1
C30 Q5 L9 L10




3
1
1




5
C4 3 + +
R13 C27 C41
VC4 2 C18 R25 VC1 VC2




1
1
+
C16 C26
Q1 R21




2
4




6




1
L1 3 Q4
U5A Q3




1
2 C33
C64




2
4
C2 3




2
C78 C9




1
Z1
C7




4
2
C1 C3 R98 R14 R15
C20




2
Z6
C5 L2
L13
R5
R1
C14 R8 Q11




+6.2V
R18 C19
U8
AF-MODE 1 Z9
+3V 1 Vout Vin 3 C125
C84 R146
2 1
C111 R9 1




1
C6 C112
3




2
C60




GND
R130
R147

R44 R45 R46 U7 L14 SW3
C70
Z3
1 3 2
5
4




TP1 +5V Vout Vin
C49 BATT1
C50 C51 L15 Q10




1
1
1
1
1




2
4
R67 C59 3
2
3


1




C29 C23




GND
GND
C28 C68 U11 3




9
Clock

Data
3 2




LD
ZC
LE




16
15
14
13
12
11
10



PS




R
1
1




P
5 2 EXTVDD
R31 1
R32 C126 C8
1 FB CE 2 1
1 1
LED2 Q8
4




U1
1




R33 R35
GND




2
+ + C10
C58 C39
C48 C11
C80 BATT2




1
R63




fin




Vp
Do




2
4
6
7
8




3
5




1
Vcc
Xfin
LED2




GND
+ + R74




OSCin
OSCout
C47 C61
R52 R62
R34 R73
+5V 1 C55
C54
+ C45 R42
C65 X1
R43 R75




1
+
3




1 2
C53 VC3
POWER




C69 Q9 Z4
C24
R39
R41

R49
Q15
R10
+3V

R52 R101
3 2
Z10 1




+5V
1
Q12
U4 C56 R100
R17 1 RA2 18
RA1 POWER R77
R50
R53
2 17
4




RF-POWER RA3 RA0
3 16 2




2
3
AF-MUTE RA4 OSC1 AT3 U9A




1
1
5




4 15
3




MCLROSC2 AT2
C57
5 VSS VDD 14 R78 R79 6 1
AF-MODE