Kenwood TS 850 S Service Manual

Page 16

TS-BSOS

CIRCUIT DESCRIPTION

2) Voice memory operation

it the optional DRU-Z is instailed, the voice memory 2) During recall

can be used Signals from the DRU-Z are sent to lC7 N2 of the IF
unit, and amplified to drive the speaker, The potene
Logic so.- VOA and veg tiometer can be varied by the monitor VR on the
Recording Monitor j Transmission panel. it is independent of the AF VR setting

VOA L H g H 3) During transmission

VOB H L t H Signals from the DRU-Z are output from Vl and sent
1) During recording to the microphone amplifier;

Signals from the microphone are sent to the \/l tere
minal of the DRU~2 and are stored into memory on
the DRU-ZI

I IF UNIT I I RF UNITIC/4i DRU2
MICD I I Vi I
I I I
I | I
I MIC AMP I I
I I l
I I vo I I I
SP I I I I l
I ICS it)? Ic7 I
{2/2) MON VR (1/2] I I I
I I I 0501 I I
I I I

Fig. 10 Voice memory operation

Filter Unit
1) Transmit low-pass filter, AT band data

Transmit band data (FED to T83) from the digital unit The switching signal split and decoded by the filter
passes through the RF unit and digital unit (W4), and is unit selects the transmit lowepass filter in the filter unit,
directed to the filter unit. and the AT band of the AT unit.

DIGITAL UNIT Ixmaasxxxr (Am FILTER UNIT (XS'I-SiOO-OD) IA/aI
l- l l- __-.:I**I
__ mo I l %° F
I PdafiISA-I I it( 1C2
I I I «iv can"fl "m V m 9 - 7 zar
I Ina-Do- I I I I0 v8 W 7 I 2 W. 02 I7 De I
H23 Lu" 5v 1; E V5 5 :'N3 03 1: D5 7r
I- 2 D - Yé 5 ma E 04 MM» 2
I MI 9% I a c f It 4 s m 3 u: I I {>174
new I u "5 3 rei 6 6 2 05s I F
L__J I I w 5 :2 VI 2 7 m? 07 2 7 F
I __ a" I I IS vs: Vo' a me on I) I 2F I
air, "-5- vs Gun '0 I
I OHM MW: gm :1 N .1,
EN? 3555 J I ma EEE SI :Inivsa 1:95:5I3I39 CM J
I... _ __ Q q o¢ _ o 06 as o -
MIMI VIII :QMWM
RF UNIT V, I f I I DIGITAL UNIT
Ixursizorom IA/4I - ' M m *_ Ixassosx-xxi (BM)
3.: M "I I" $5! 73235
, ii I
I :2 s n
7 (I 3
4 2 'I I

15 I- __ _j_J lift... ,____ Fig. 11 TX LPF and AT band data

Page 104

TS-8508

ADJUSTMENT

Measurement Adjustment
Item Condmon iii-em Farts Method Specifications/Remarks
28. ALE 1) ENT 296 ENT key . Push Power meter VH1 90W :SW
frequency Display f. : 29,600MHZ
character- CAR VFI : MAX
istic STBY I SEND fl _
2) ENTMZ ENT key .Push When the above I
Dispiay r'. :34200MH2 range IS exceeded
STBY : SEND durrng transmrssion.
repeat the above
. adjustment.
27. Power 1) PWR : MAX Fewer meler VRQ Adjust power set to 90W dm should go out at 88W
meiar CAR VR ; MAX :90w, or higher by turning PWR
STBY SEND s TNT-rum MW?
1 3 5 1 9 an 40 was
IIIIIIIIIIIIIIQDUDEDDUDDCUEDDD
o 10 50 100 x50 200 250V
pr l__l_;l_I_I_L
28, Power 1) ENT 287 ENT key :Push Power meter VRA 55W i5W
down Display f. .28.700M|-lz
FlF unh 31 :ON
PWH MAX
STBY: SEND
After adjusred S} :OFF
.ZITUNE . ON (7 key) VH6 .55W iSW
PWR : MAX
RF unit VR6 : MAX
STBY : SEND
W After agjusted TUNE : OFF .. (MM)
29. MIN power I} PWR : MIN EPunter meterr Rear VH5 10W 20W or less
STBY , SEND : l pang
30. Power 1) MODE : CW , Power meter TC1 Reduced PWR to
control PWR : MAX MIN and adjust TC1
tracking STBY : SEND so that ALC merer
Turn CAR VR and set to ALC :eacnes zone MAX.
meter zone MAX. M
32. Camer H ENT142 ENT key : Push Power meter ~VR501 Adiust so that wave
point Display f. :MQDOMHz Dsnillasnupe forms cross with
While pushing the F. LOCK LSB, ,
key. POWER:ON '
{Display the MENU Nu of M, CH] AG
3 Display :00 (MENU No. 00) AF V M V9502 Adjust 50 mm wave
3' MODE 1 USE/L88 forms cross with
aasmHz me: key . SkHz i use
g AG] :BOOHz/va j
2 A62 :3500Hz/5mv
l MIC : Level at which nor
activated
: STBY : SEND ;
ZI BBEMHZ filter key 2.7kHz VFISU3 lAdjust so that wave 3
l Turn the click encoder to 5&1 forms cross er'n r
MENU 1. I USS.
MODE : LSB/USB
l Aer . IkHZISmV , Check 5:: ma: waveforms
1 A62 3Ak5-lz/5mV cross with LSE.
i, MIC :Tum slowiy When the wavefurms do
STBY : SEND not cross wfih LSB.
adjust while changing
After adjusted the mode to set in
CLFI kev : Push . the same waveéorm. '
l
104