RCA RDR9000 User Manual

Service Manual 6. UHF1 (400-470 MHz) Information
124
6.8 Troubleshooting Flow Chart
6.8.1 Receiver Circuit
9V1A_RX output is
normal? [1]
Receiver circuit check
No
Check Q1001 and
Q1002.
Static working
point of Q6002 is
normal?
[3]
Check Q6002.
Static working
points of Q6003 and
Q6004 are normal?
[4]
Check Q6003 and
Q6004.
Input IF signal via
TP6008 to check whether
IF sensitivity is normal?
[5]
The second LO is
normal? [6]
Check Q6006 and
peripheral
components.
18 MHz clock
frequency is normal?
[7]
Check D6008 and
appropriate
components.
TP6012 outputs
normally? [8]
Check Q6002 and
the front-end RF
circuit.
R6075 outputs normally?
[9]
C6015 outputs normally?
[10]
Check the RX
VCO circuit.
TP6008 outputs
normally? [11]
Check U6001,
Q6003, Q6004,
and peripheral
circuits.
Input signal is normal?
[12]
Check signal
frequency,
amplitude, and
modulation
information.
Completed
Yes
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
No
Yes
No
No
Yes
Yes
No
Yes
No
Yes
5VA_RX output is
normal? [2]
Check U1005.
Yes
No

RCA RDR9000 Specifications

General

Brand	RCA
Model	RDR9000
Category	Repeater
Language	English