| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | GR1-AX | no sound or pic - low hum from spkr | No line drive due to C2058 22µ o/c connected to pin 11 IC7020 | 14-09-04 |
| Philips | GR1-AX | No tuning | R3703 oc | 14-09-04 |
| Philips | GR1-AX | pic shifts to left, line tearing both int | C2523 6µ8 50v int o/c line driver supply smoother | 14-09-04 |
| Philips | GR1-AX | Poor tuning lock - no high channels. | Tr7705 ( PH2369 ) | 14-09-04 |
| Philips | GR1AX | 6613 type change | 6613 type change
----------------
A production change has been introduced in receivers with serial
number starting SV9306 and higher.
Diode 6613 BZX79-C15 is changed to BZV85-C15 code no.
4822 130 33732.
| 14-09-04 |
| Philips | GR1AX | After replacing uP and memory, setting does not stay. | The appliance is in hotel mode. Go to program channel 38 and press
buttons store and control+.
| 14-09-04 |
| Philips | GR1AX | As replacement for all IR Receivers item 1785 in t | As replacement for all IR Receivers item 1785 in the GR1AX chassis
is delivered type TFMS5360 (execution with connecting pins of 18 mm).
Service code 4822 212 30842.
The pin configuration of the TFMS5360 can however differ from the
original IR Receiver.
F | 14-09-04 |
| Philips | GR1AX | Avoiding damaging sound IC due to EHT discharge | Avoiding damaging sound IC due to EHT discharge
-----------------------------------------------
To prevent failures of the sound IC TDA7052 during servicing, do
not discharge the EHT voltage via the heatsink. It should be
discharged through the aquadag.
I | 14-09-04 |
| Philips | GR1AX | Blank or green raster,flyback lines, faint pic or normal pic - no OSD after LOPTx replacement | R3544 2R7 fusible pin 4 LOPTx int removing 5v supply | 14-09-04 |
| Philips | GR1AX | Blank raster - no sound or response to R/C | No o/p from IC7029 TDA8305A - chip faulty | 14-09-04 |
|
|
| Philips | GR1AX | BLANK SCREEN , NO SOUND | C2044 4mfd SC. | 14-09-04 |
| Philips | GR1AX | Buzzing sound | C2523, D6058, D6030, C2058, R3058 | 14-09-04 |
| Philips | GR1AX | Change of C2523 | Change of C2523
---------------
A production change has been introduced replacing C2523 6.8uF 50V
with 68uF 63V (code number 4822 124 40754).
Note: It is possible for a failure of C2523 to result in the
consequential failure of T7528 BUT11AF/BUT1 | 14-09-04 |
| Philips | GR1AX | Changing tuner. | Mod type see Tv Mag. | 14-09-04 |
| Philips | GR1AX | Chassis manual correction. | Chassis manual correction.
--------------------------
Only for 21" S
In chassis manual GR1-AX21"-S, 4822 727 18308, a wrong code has been
published for the uP item 7700.
Latest version of this uP item 7700: TMP47C434N-3537, 4822 310 31947.
This is a non | 14-09-04 |
| Philips | GR1AX | Color intermitting. | Re-solder RGB ribbon cables (black) between CRT-panel and chassis:
Position number 0051 - PCB GRID E6 on solder side of chassis
Position number 0003 - on the solder side of CRT panel
Position number 0053 - PCB GRID B5 on solder side of chassis
Position nu | 14-09-04 |
| Philips | GR1AX | Colour - green screen. | IC TMP47C434-3559 tuning IC. | 14-09-04 |
| Philips | GR1AX | Colour dropout when reproducing pre-recorded video tapes | When reproducing poor quality pre-recorded video tapes, the
available chroma burst signal from the recording may not be
sufficient resulting in colour dropout. This can be improved by
increasing the chroma sensitivity of the receiver. The value of
C2322 | 14-09-04 |
| Philips | GR1AX | Colours flicker and disappear. | Check C2050 (68nF; 5322 121 42465).
| 14-09-04 |
| Philips | GR1AX | Contents of memory lost | It may happen that when switching on from standby the set comes on
in "store lock" mode (sometimes called "hotel mode"). In this mode
stored settings for programme selection and personal preference
cannot be changed (see operating instructions for leavin | 14-09-04 |
| Philips | GR1AX | Control micro processors | Control micro processors
------------------------
A production change has been introduced adding a shield to the
control micro processor to prevent the processor being influenced
by external fields. In future, replacements will be supplied as a
kit compr | 14-09-04 |
| Philips | GR1AX | Correction to service manual LOT winding | Correction to service manual LOT winding
----------------------------------------
In the service manual of the GR1-AX chassis the circuit of the line
output transformer is drawn incorrectly both in diagram A and the
main PCB layout drawings.
The +160V wi | 14-09-04 |
| Philips | GR1AX | CRT types | CRT types
---------
Some receivers were fitted with a CRT type A34JFQ40X04 in
production.
The standardized replacement for all 14" receivers with these
chassis is the A34EAC01X45. Spacers may have been used when
mounting the A34JFQ40X04 in the cabinet. | 14-09-04 |
| Philips | GR1AX | Dead | CHECK L5524 - 9v SUPPLY TO LINE OSC FROM PIN 26 STARTED FROM PULSE ON PIN 11 OF i.c. 7020 | 14-09-04 |
| Philips | GR1AX | Dead | L5519 o/c; C2523 6µ8 63v low cap | 14-09-04 |
| Philips | GR1AX | Dead | D6613 15v zener, D6610 10v zener & D6644 1N4148 all leaky & LOP Tr s/c - check R3616 & R3680 1R in series | 14-09-04 |
| Philips | GR1AX | Dead | D6546 BY228 EW mod diode s/c, F1534 fuse blown; | 14-09-04 |
| Philips | GR1AX | Dead | D6610 10v zener s/c; BUK444B chopper FET s/c; R3616/3680 1R o/c; BUT11AF loptr s/c | 14-09-04 |
| Philips | GR1AX | Dead - 95v HT low at 15v | C2618 27nF o/c - blue plastic body | 14-09-04 |
| Philips | GR1AX | Dead - HT at 15v | D6610 BZX79C10 leaky | 14-09-04 |