Philips philips GR2.2 free download

File name philips_GR2.2.pdf

WEBSAT http://www.cybergenom.com/cybersat.htm FAX: 957-43-34-14 [email protected] WEBSAT http://www.cybergenom.com/cybersat.htm FAX: 957-43-34-14 [email protected] WEBSAT http://www.cybergenom.com/cybersat.htm FAX: 957-43-34-14 [email protected] CORRECCIONES Y MEJORAS.- Correction to service manual. Fault 1: The circuit diagram of the picture tube base panel shown on page 6.27 of the GR2.2AA service manual is incorrect. Diodes 6301, 6331 and 6361 are shown with cathodes connected to the emitters of 7304/7305, 7334/7335 and 7364/7365 respectively. This is incorrect. They should be shown with cathodes connected to the bases of 7304/7305, 7334/7335 and 7364/7365 respectively. Fault 2: Spare parts list of GR2 should be corrected as follows: Service Manual for 21ST2731/05B 4822 727 19403. Add Control board, Code no. 4822 432 10957. Service Manual for 25ST1750/25B 4822 727 19042 Part Old code no 7 housing 25" 4822 438 50798 (New code no 4822 430 50798) 7 housing 28" 4822 438 50799 (New Code no 4822 430 50799). Service Manual Position GR2.2 AA 1043(TPS6.0MB) (4822 727 19063) 1103(SFT6.0MA) Old Code New Code 4822 242 71841 4822 153 30025 4822 242 71841 4822 242 71841 Note: Although the code no for 1043 changes, code no for 1103 remains the same. Replacing IF/sound stereo panel. Note: Check if there is a connection between pin 4M50 and R3064 before you place a new IF/sound stereo print pos. 1001 code number 4822 212 30069. If not, the input of the sync IC will be short circuited via mute line B40 (On diagram B, 4M50 runs to A21, this should be B40, see information corrections doc. GR2.2AA). Connection of a loop system to the TV. Note: A problem usually occurs when connecting a loop system to a modern TV. A solution is available from the hearing aid suppliers in the form of a specific loop system amplifier which is supplied from the mains and which functions with a scart or phono plug signal. With the advice of a specialist a large part of the cost is usually covered by insurance. Improve IF circuit. Replace 1Kohm by 1k8 (4822 050 11002) on the separate front control board. Do this for the pos.numbers 3200 and 3205 REMARKS : Only for GR 2.2 with separate front control. Improvement of TXT circuit. Replace IC 7800 (SAA5246AP/E/S) by SAA5246AP/E/M7 with code number 4822 209 32642. Replace crystal 1800 by crystal with code number 4822 242 81191. Both changes are on the TXT-panel. Diode modification. Replace BZT03-C16 on pos. nr. 6611 on main panel with BZV85-C16 Reason: Better performance of diode BZV85-C16. Modification of the second scart circuit. pos. nr. 2815 becomes 39nF (4822 121 42444) pos. nr. 2816 becomes 39nF (4822 121 42444) pos. nr. 3802 becomes 330R (4822 116 52219) pos. nr. 3803 becomes 330R (4822 116 52219) pos. nr. 3815 becomes 2K2 (4822 051 20222). Modifications. Note 1: On IF-panel 1043 becomes 6MHZ TPS6.0MB (4