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eee A ee
ee
TROUBLE SHOOTING
Key input not resistered
{Because $.0. signal from TA PW Board ie more than
o5v
Does not stop wien 2 broadcast is received dur-
ing Auto-tuning operation
Check whether or not the uri operates normaly when she | YES
ower switchs tuned OFF ance and tured GN again after -——-efUisoperaton
of [OSG conuoler
f
1
No
[more than 5 see
'Does
the gral indicator fight?
|_—__.f "Signal sarength weak
H
E
Tro
iad
{
sck whether or not the power voltage of micro-camputer
No
"zero"
p o i n t
adjustment checking
af
?
NO
[Gage hao nar omer venage
a t e
arpa
(tein of
p o n e r anise
15 the zero" paint adhstment checking af T20t die | NO
ra
aor
[ves
PS
inal
Beer | YES
NO.
i
rin
sat to H i g h f e v e l
dur | NO
XO.
Se whiter o at CE wna
SER
or
heen
aut
Pe
ee
Teo
+ [ska
|
Teo
[vs
PS
fs
hack whethar of nat when deprassed, he RETURN signal | NO
{FUNCTION switch is set to PHONO/AUK o- the circuit on
1650S faulty
G27 fouty
corresponding to the Geprossed key is WAITTEN to the K
the FUNCTION switch PW Sourd connected to 0604 base
int terminals 2 ~ 2.
is fouley. (0506. GAOT etc.)
| ves
Trouble with dispiay tube
Faulty connection of the 9 core jumper tead wires which
16508 fulty
Le} connact the kay board switch and the TA PW Board or
205 — 0512 faulty.
~ [Bees the Goplay operate noimaliy when the power switch]
YES
culo ones, and then turned on agai ater mare than S | ———l
"Misoperation of 6809 conralor
Frequency indicated on the display cannot be
yo
-
i.
1s the power supply to the synthesizer section normal?
| ————~e{ Check voltages of 0803, Q604, 20602, 0008, otc.
NO
YES
Ip the power supply to the synthesizer section nocmal?"
| ———»{ Check voltages of G03, Q908, ZDAN2, OBG8, atc.
ae
|
aa
na
1s the tep votiage of the flamont winding 1AC 2.30) of the
"ai
Some onsen
1?
ves
1s the filament voltage of the display tube approx. 23V?
1s tha AM local input terminal
AM Front
af 1C603 sec ta more than 364mnV?
FY
fend faulty
ves
YES
ves
'Connection
of Sand 7-core jumper wire which connects the
'Which is recived. FI or AM?
No
Power transformer fauvity or wiring {rom the filament
Winding of the power transformer to the display tube P.W.
Boor faulty
Te the FM local input tarminal @ LNO_
[FM cuner
at ICBO set co move than SIM
pack Faulty
A
ane
MR
Se
TA PW. Board and display PW. Board faulty
{Cea fet,
No
(Care 807,02 normal?
'0501, 502 faulty
Les
16503 fautey
(PLL is not locked)
Auto-tuning operation is not performed and the
preset kay is not accepted during FM auto-tuning.
No
15 poe sup wo syria norma?)
[~~ "Chak volugea of GBD, O04, 26800, OBOE wes
[vs
No
:
is Fi oslo erin
fH or an Sew? —}~° "Farner pack uty
ps
wo
i Fit iocl Bp nical 38 TICS ve han aT} of TERT Tae
ves i
0
ean
naar Se ety
[es
10508 Faure
-21-
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