RCA RDR9000

Service Manual 6. UHF1 (400-470 MHz) Information
327
8.8.3 FGU
5VFGU,
3V3ARF, and 3V3DRF
are normal?
FGU check
Check the power
supply circuit.
VCO oscillates? Q6007/Q7000 is normal?
[1]
Q6012/Q7003 is normal?
[2]
Replace
Q6012/Q7003.
Check peripheral
components of
Q6012/Q7003.
Replace Q6007/Q7000.
CV voltage is normal? [3]
VCO buffer circuit is
normal? [5]
Check the VCO
buffer circuit.
L6057/L7003 is normal?
[4]
Replace L6057/L7003.
Feedback output is
normal?
Check the
feedback circuit.
19.2 MHz crystal
oscillates?
Check the 19.2 MHz
crystal oscillator and
circuit.
SKY72310 clock is
normal? 6]
Check the data
circuit of the
control circuit.
Completed
No
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
No
Yes
No
Yes
No
Yes
Yes
No
No
No