Kenwood KR 5150 Service Manual

Page 1

KENWOOD

Hl/Fl STEREO COMPONENTS

SERVICE MANUAL

SOLID STATE AM-FM STEREO RECEIVER

Page 3

PARTS DESCRIPTION L T

Symbol No. Description Part No. Remarks
R307 Fixed Carbon Composition 2.2km £1096 1/2W RCDSGF2H222K
POTENTIOMETER
VR1 VOLUME (50kflB) Dual ROG-400505
VR2 BALANCE (IOOkQW) Slide R13-4005-05
VR3 BASS (50knA) Dual R084042-05
VR4 TREBLE (50knA) Dual R084042-05
TRANSISTOR/DIODE/THERMISTOR
01~4 ZSC1 I 1 1
05 250234
01 531
DZ 1001
US 153381
TH 1, 2 SOT-65
SWITCH
S1 SELECTOR (Rotary) F ' 5 ' 14 ' 6 8011-5012415
$2 MODE (Rotary) F ' 2 ' 4 ' 5 804-203705
S3 LOUDNESS (FIVE Pushbutton) 839-50010?»
S4 TAPE MONITOR (FIVE Fushbutton) 839500105
55 MUTING (FIVE Pushbulton) SSS-500105
56 LOW FILTER (FIVE Pushbutton) 539500105
57 HIGH FILTER (FIVE Pushbutlon) 53-5001-05
S8 SPEAKERS (Rotary) F ' 2 ' 6 6 504403605
89 POWER SW (Push Button) S£-101005
$10 PRE-MAlN SEPARATE (Slide) 510-220
511 AC VOLTAGE SELECT (Slide) 531-2004-05
MISCELLANEOUS

- Chassis AID-020901
- Frame AIS-000204
- Panel A200326-05
- Sub-Panel A22-0075-02
- Rear Panel A2301 63-1 2
_ Reflector (A) A330009-03
- Reflector (B) ASS-001003
- Sole Plate A40-0058~03
- Thnrmistor Holder x 2 Asa-310
_ Antenna Holder A5065
_ Motor Holder (for TUNING) x 2 A51078
- Name Plate 309-190
- Caution Sticker 809-192
_ Front Glass BIO-003202
_ Dial 8200158033

Dial Pointer 821-4001-05
P. L. Pilot Lamp (Fuse Type) x 4 830001515
P. L. Pilot Lamp (Small) x 8 830-0033-05
M SIGNAL Meter 831-0006-05
M TUNING Metlr 842-0009-04
- Name Plate 842-0024-02
- Certification 842000904
- Schomatic Diagram asamvz-oh
- Flywheel DDS-52B

Page 11

LIGNMENT PROCEDURE

1. Instruments:
2. Selector SW:
3. Warm-Lip:

FM MPX ALIGNMENT PROCEDURE

(3)

SCA FILTER

Audio 36, AC VTVM & Oscilloscope
Always place in PM AUTO position
Allow 30 minutes warm-up period {or Receiver and equipments

STEP Audio Signal penerator Audio Signal Generator AC VTVM Bl Oscillo- Adjust Remarks
(,oupling Frequency scope Coupling
High side to (B) 67 kHz High side to (C) (X04-0010-10) r i .
1 Low side to chassis (0.5 V) Low side to chassis Le} Minimum Deflection
(b) MPX
1. Instruments: FM 56, Audio 36, AC VTVM 6t Oscilloscope
2. Selector SW: Always place in FM AUTO position
3. Warm-up: Allow 30 minutes warm-up period for Receiver and equipments
(Field Strength: IOOOuV at Antenna Terminal)
FM 350 19 kHz VTVM &
STEP . Carrier Oscilloscope Adjust Remarks
. Modulation Input r .
Coupling watch Connection
Frequency Selector
1 FM Antenna OFF OFF ON High side to (.C). (X04A0010A10) Maximum Deflec-
Terminal Low side to ejaSSis LC 1. Lc4 tion
2 FM Antcnna OFF or A + B or ON OFF (X04<0010-10) Beacon Lamp
Terminal 400 Hz REVERSE VRcl "ON"
' To obtain a wave
. form with maxi-
To distant 0f 3 A +15 or LEFT or RIGHT (X04-0010»10) mum amplitude
3 Antenna 1 400 H7 0N outputJack of r .
. R EVERSE Lc4 and minimum
Terminal TAPE REC . .
I distortion at 400
' Hz on oscilloscope
4 FM.l"'e""a 2.000 H7 A or LEFT ON RIGHT output (001le M'mmum Dene"
Terminal Vile} tion
5 PM A."°""a 2,000 Hz B or RIGHT ON LEFT output (001le M'mmum mac
Terminal VRe3 tion
6 Repeat steps 4 B! 5 until no further improvement is possible.

Page 13

ALIGNMENT PROCEDURE

AM ALIGNMENT PROCEDURE

Alignment tools: IF transformers require a plastic screwdriver-type alignment tool.
Instruments: AM SO, AC VTVM 51 Oscilloscope.
Selector SW: Always place in AM position.
Warm-up: Allow 30 minutes warm-up period for Receiver and equipments.
AM Signal Signal . . . .
STEP Dummy Generator Generator Selector Tuning'Dial Indian Adjust Remarks
Antenna . Switch Setting Meter
Coupling Frequency
r is 5 ° {W 455 h 5"" T" Tuning (UA1224K3) Maximum
1 Direct antenna terminal, (400 Hz AM interfering Indicator Lb4 6 9 Deflection
Low side to chassis 30% AM} setting
Connect to short ;
loop of wire, 600 kHz . (UA1224K3) M .
2 Direct Radiate signal into (400 Hz AM 600 kHz :32? um 0:323:31
ferrite loop stick 30% AM) AM ANT.
antenna Of receiver
Connect to short
loop of wire 1400 kHz . .
' 5K M
3 Direct Radiate signal into (400 Hz_ AM 1400 kHz :33; (2215116) 13:32:;
ferrite loop stick 30% AM)
antenna of receiver
4 Repeat steps 2 8t 3 until no further improvement is possible
AM 1000 kHz r
. Signal (UA1224K3) 3.5
5 We 33m; (432.73% M 1°°° *1 indicator ms indicated