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Quick site processing. A complete and very useful manual with all details. Thank you!
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Quick service response. A useful and very rare service manual with all details. I recomend this service.
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I ordered this manual sometime in the afternoon and I received it on my e-mail the same evening.
This is a fantastically good and properly scanned copy of the original manual. All pages are of the same scale and they overlap each other. It means that you can print the manual and easily make it as a convenient paper manual.
The content of the manual is fantastic. Alignment descriptions, PCB layouts and elementary diagrams are explicit and precise. I immediately found what I was looking for. Thanks to this manual and Owner-Manuals.com my amplifier is alive again. Many thanx indded!
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The manual was well-scanned and easy to read. As an added bonus, the Operator's Manual was bundled with the Service Manual!
I'd definitely use owner-manuals.com again.
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Finally, i found one website, where i can download this service manual , and fix my hifi. The service manual is very good, and easy to download and to print.
TROUBLE SHOOTING TABLE (Continued)
NO RASTER
CIRCUITS TO BE CHECKED: Tuner. PIF. Automatic Gain Control. Contrast, Brightness and Sound controls ?
Normal Replace the fuse.
14B2-TX/20B2-TX 21B2-TX
PICTURE, NO SOUND
Check F701. Blown out. (5V), (33V) Power Source. Does the noise level increase at max.
Noise increases but no signal is received.
(Approx. 310V at 220V AC)
No snow noise.
The fuse is blown out again.
Check T701 pin (7) voltage Abnormal
Check IC701, D701 and C707. NO YES
Normal 5V. BT must be approx. 32V D709.
Check the tuner supply voltage LB must Check R701, R707 and IC801 ? and CH preset data check.
Does signal appear at pin (40) of
Secondary Main+B Does signal Check IC801 and
Normal T701 (17) voltage appear at pin (38) its related circuit.
Check the tuner AGC NO YES at TP201. D758, IC702, IC753 Check CRT connector D1001 (Power LED Green) Check Q204 and Normal Abnormal
NO its related circuit.
D1001 (Power LED Red) Check pin (27) of IC801, Tuner and
Abnormal (Approx. 115V) Normal of IC801 ?
and R712. K1-K5 bias. turns on. YES
Abnormal Normal
Check pin (38) of on or turns ON/OFF. Check pin (1) of SF201 and IC801. Tuner's related circuit.
Checking the protector circuit.
R615 R618. Check pin (37) of IC801 and C878. IC801. related circuit.
Check ON/OFF ON
related circuit.
18
YES CIRCUITS TO BE CHECKED:
Bus error mode Does horizontal circuit See Fig.1 NO oscillate ?
Check IC801, IC751, D605 (44) of IC801. and Q601. » Sound Detector Circuit.
» Sound system pins (28) and » Sound Switch and Att. NO Does signal appear at pin (28)
NO SOUND
Control. (44) IC801 ? of IC801?
If a bus error happens, LED RED [pin (11) of IC801 LOW] indicator starts blinking and the
» Audio Output Circuit. power is turned off. YES The power key (CHANNEL button on the TV) is still effective. (Signal)
YES NO
Fig.1 EEPROM IC1003
V/C/J IC801
(6) and (8) of IC301 ? Check IC801. peripheral circuit.
NO (M24C08) Does signal appear at pins Check C356 and YES (IX3412CE)
AV Switch IC401
(M52797SP)
PLL Tuner TU201 2s 0.5s
(VTST5HD84)
P301 connector of Check Q301, pins (4) and (6) IC301 circuit. of IC801 and peripheral circuit.
18-1 18-2
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