Troubleshooting - Kenwood TR-7625 Service Manual

TR-7625
Double Bushing
Die Cast Panel
(J42-0408-04)
(A20-2345-03) (K)
(A20-2347-03) (W)
(A20-2346-03) (T)
Knob Bushing
(J42-0409-04) 3 each
Push Switch
($40-2404-05)
Push Switch
(S40-2 403-05)
Small Pilot Lamp
(B30-0106-05) :
:
Lamp Stopper
i
Push Switch (J21-2406-04) 1 each (E06-0552-05)
(S40-2403-05) 1 each 4P Metal Socket (W). (T)
: : y S.) (€06-0453-05)
bs, ee Masking Sheet )
Power Switc
Z
(F1§5-0623-04)
$36-2402-05)
iss ue S-Meter
Push Switch M
(S40-2409-05)
5P Metal Socket (K)
(B31-0616-05)
Meter Stopper
(J21-2603-04) 1 each
Fig. 11 Disassembly of Front Panel
TROUBLESHOOTING
1. PLLCIRCUIT
Q21,022025
Check Voltage on TP8
Q Defective
OK
ill Check local oscillator
Q1~03
defective Inoperative on
one band only
oscillation. defective
NG
OK
NG
Check MIX output.
VCO does not oscillate.
Q27~29 defective.
Check TA7O6OP
input. Ne
L18, C59, C60 or
C61 defective.
NG
Check $M5111A input.
ite TA7060P_
~
lefective.
ie
No 10.240 MHz
L17 or O15
Poor VCO adjustment. Readjust
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