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This is the original manufacturers service manual, with detailed info on the circit boards, explosion drawings of all parts in assembly order, and tuning instructions. The only thing missing is the information on the dimensions of the various drive belts. mail me if you need them. gcrossman_at_aol.com
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Ordered service manuel for a hard to find plasma tv - your company made it easy to find and purchase - I will use you again
Thanks for your help
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This is a high quality manual with clear schematic and components layout diagrams ; with service procedure included.
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This service manual for the Kenwood KT-990D was reproduced really well ,is very legible and manual is complete.Combined with the low price paid,in the future,I will be checking Owner-Manuals.com any time I need a manual.
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When I purchased this manual I had my doubts regarding the quality as the price was so reasonable as compared to other outlets.
The manual itself is of high standard the print is very clear as are the diagrams. Obviously with the diagrams one has to zoom in otherwise it is to small to be able to read.
Overall I am very pleased with the company who delivered as they said and with the manual they supplied.
I occasionally require a manual and now having registered with this company I shall order from them in the future.
IC DESCRIPTION
IC, pPD780228-xxx-xxx Pin No. 1 Pin Name K-SCAN I REVOLA RE VOL B D-CD D-AUX
& 1
1/0 o I
,
Description Key scan output. PALS data input A for encoder volume. PALS data input B for encoder volume. CD function LED control. AUX function LED control. Tuner function LED control. Tape funtion LED control. Line Mute control for PRO-logic unit. CD unit power ON control. (H:ON) Tuner block power ON control. (H:ON) Bias oscillator control. (H:oscillation) REC MUTE control. (LREC) I TAPE 1/2 select control. (H:DECK1 play) POWER ON control for audio block. (LPower ON) Latch control for shift register. CD flash window control. (H:Light up) Extension port (connected to GND).
Pin No. 43 44 45 46 47 48 49
Pin Name I-CD-SW I-DISH I-RE-JOG I-SIG I-SPEANA I-KEY2 I-KEY1
I
1/0 I I I I I I I CD tray SW detector. CD turn-table detector. Pulse data input for rotary encoder. Tuner RDS signal level input. Data input for SPEANA light up. Tact key level input 2. Tact key level input 1. I GND input for AD transfer. FL segment scan output.
Description
I
2 3
4
I
I
I
II Io I o o
,
I
I
5 6 7
I
r
D-TUNER D-TAPE O-MUTE O-CD ON O-TU ON O-BIAS O-RMT O-CD LED O-PB1 O-POWER O-FCE
I
8 9 10 11 12 13 14 16
I
Io Io
I
50
AVSS P1-P8 P9/TM-BAsE PIO/RDS P1l/OIRT P15/PRO P16/DSP P17 P12/LW
I
o 1/0 1/0
I
I
Io
Io
51-58 59 60
I
,
I
FL segment scan output/TM base input. FL segment scan output/ RDS mode detect. FL segment scan output/ OIRT mode detect. FL segment scan output/ LW mode detect. FL segment scan output/PRO-Logic mode detect.
10
I
o
o
I
61 62 65 64 63.
1/0
1/0 1/0 1/0 1/0
I
15
I
17 18
I
Ic
Vss
1- 1 I- I 1IO 10
1
IO
o
k=
66
P13/AM.sT+FM.w P14/AM9K
FL segment scan output/AM stereo+ FM wide mode detect. FL segment scan output/Initial AM 9K mode detect.
1/0 1/0 I
FL segment scan output/DSP mode detect. FL segment scan output.
System GND. System VDD supply. CD turn table REVRSE control. (H:Reverse) CD turn table FORWARD control. (H:Forward) CD tray OPEN data output. (LOpen)
+
67
I
19
20
I
I
VDD O-DISH RVS O-DISH FWD O-OPEN
1
I I
1
I
68 69 70 71 72-78 79
80
I
P18/HP MUTE SPEANA AfP19 SPEANA B/P 20 SPEANA C/P 21 P22�P28 VDD2
-VFL
1/0 1/0 1/0 1/0
FL segment scan output/ Head Phone Mute input. FL segment scan output/ SPEANA level input timing A. FL segment scan output/ SPEANA level input timing B. FL segment scan output/ SPEANA level input timing C. FL segment scan output. System VDD supply. Power supply for FLdisplay. FL segment scan output/TAPE REC SW detect. FL segment scan output/TAPE PLAY1 SW detect. FL segment scan output/TAPE PLAY2 SW detect. FL segment scan output. FL grid scan output. � I I
I
t
21 22 23 24
25
I
1
o
O I I I
1
I I
I
O-CLOSE I I-SQ.DATA/i= I
1
CD tray CLOSE data output. (LClose) CD SUBQ data input/tuner IF count input.
CD SUBQ clock ouput / tuner mono,stereo selection input. (LStereo)
oI
I
I 1/0 I 1/0 I 1/0 I
10-SQ.CLKHI13RE0 I CLOCK/DSC
I
vo
I 1/0 I O I
26 27 28 29 30 I 31 32 33 34 35
IO
Clock output for shift register, DSP & PRO unit / DSC control for PRO unit CD sense input/Tuner PLL chip enable output. CD data output/Tuner PLL clock output.
81
P29/REC I I I P30/PBl P31/PB2 P32-P35 G13NG1
I I-SENS/O-PLLCE
I
IO-CDDATA/PLLCLKl
I I
I
82 83 84-87
I O-XLT/I-RDS CLK I I/O
I
I
CD XLT output /Tuner RDS clock input. Micon reset input. CDclockoutput/Tuner RDS data input.
o
o
I
Ei5s
111
1/0
I
88-1oo I
10-CLw-RDSDATAl PRO-CE DATA/FDSC I-RMC O-PLL DATA
I
1
o o
I o
1
Latch control for PRO-Logic IC and DSP IC. Data control for shift register, DSP & Pro unit/ DSC control for IC,M62439SP. Serial data input from remote controller. DSC control for Function IC / Tuner PLL data output. Micon clock shift output. Clock circuit VDD.
4.91MHz oscillator circuit.
36 37 38 39 40 41 42
O-C.SHIFI� VDD1
x2
o
xl Vssl AVDD HOLD I I
4.91 MHz oscillator circuit. Clock circuit VDD. VDD input for AD transfer. AC/ DC detector.
-39�
-40-
$4.99 ZR555 AIWA Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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