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Panasonic RF-2900LBS Service Manual page 4

Fm-am 6-band portable radio
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Catch of Cabinet Start Ponint
(W)
|
RRDASI¥A
; |
f L
a
Dial Scale Gear
Catch
Start Po int
Fig. 14
Indicator
|
Catch of Dial Scale
(WW)
Fig. 15
Fig. 16
Procedure
To remove—.
Remove—.
Shown in fig—.
1
Battery Cover
2
Cabinet Cover Ass'y
SCKEW (3X25).
sezsavisssinenescines ond (A) x6
5
3
SOCK Ct sissinsisaswensacawwssmpensawenisy (B)x3
6
4
Balid! Kn ODiiiss.scins
sc siissainaeescilaven (C)x1
7
5
IF, RF Circuit
SOCKEL, .i:osicdnuessnenesheraramaanewnnne (D) x7
6
6
Board
«1, 2
SGrew! (3:16) sinsseasensansanneaiceesas (E) x2
6
7
SCrew (S510)
ccasessneasesesseeses (F) x6
6
8
Frequency Counter Block
Screw (3X10)
.........ceeeee
eee ees (G) x2
6
9
Frequency Counter
Screw (3 x6) anid isinsieindenesieteesmimse (H) x4
9
10
Circuit Board
Screw (3X6)!
siiscsscserseanvensaceecs (I)x2
10
1
TUNING KRAOD: wiscsicasisineacanseieeiaaens (J) x1
7
Dial Scale Chassis
12
Screw (3X10)
......scccsesesseeens (K)x5
8
13
BGIE snscapusisatipiniiscsmninnaadcncetnesead (L) x1
12
Dial Mechanism
+3, 4, 5
14
SCrew (SAO):
sdencctsnaseewoaeres (M) x2
11
15
Dial Scale
x6, 7, 8, 9, 10
SCEW (23'X'6)
sevssvsversonesovenrs (N) x1
12
16
NOD!
oui sic cotisacnueesarsaniaecensns (O) x6
iA
AF Circuit Board
nA
Screw (3510).
ssisvesscsewaevetieas (P)x5
16
18
KNOB:
ssichivadaGimelasonenaneandengenuses (Q) x3
7
Control Circuit Board
19
Screw (3X10)
....ccsceesesssseeees (R) x3
16
4
To remove—.
Remove—.
Shown in fig—.
Procedure
20
T
Screw (3 x 10)
16
Preselect Circuit Board
Screw (3 x 16)
16
« 1. Turn the tuning knob fully counter-clockwise.
x 2. Turn the tuning capacitor shaft fully counter-clockwise.
«x 3. Turn the tuning shaft fully counter-clockwise.
« 4, Set the dial scale at the position, as shown in fig. 12.
* 5. Refer to dial scale removal instruction.
« 6. Loosen the two (2) screws (V) for the dial scale gear, as shown in fig. 13.
* 7. Set the catch of dial scale gear to the start point of dial scale, as shown in fig. 14.
«x 8. Turn the tuning shaft fully counter-clockwise.
x 9. After mounting the PC board (IF, RF circuit), turn the dial scale by pushing the catch of dial scale and set the start
point of dial scale to the catch of cabinet, as shown in fig. 15.
* 10. Tighten the two (2) screws (W) for the dial scale gear, as shown in fig. 15.
BLOCK DIAGRAM
TELESCOPIC
ANTENNA
Diode
Switching
Eee
CERAMIC FILTER
——
ra
q MPX OUT
FM OSC
F
Fi
surrer [| FM OSC
ol
c
(cw
yee ad
101
2
CLT
ee
ee,
ee
2
2l=aseSaaaee
eee
FILTER
fr
©
|
r
7
:
EM,
TUNE/BATT
FM
FM
EM.
TER
®
!
AMP
o)
(/)
o
aM
METER
|
RECT
DE-EMPHASIS
sre
BASS
TREBLE
FM
rss
°
AF
LIMITER
FM DET
F—() zz
PRE AMP
'AM
p t
aS
A
|
VOLUME
AM DET
(2
TUNE
EP/EXT SP
sP
(IMP 82)
POWER AMP.
COUNTER
COUNTER DISPLAY
oon
im ae ee
/
/
POWER
J
oc 5V
REGULATOR
Q
S H
arCTFIER
'ACIN
° 8 2 2
eatuififife
+,
Fig. 18

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