CR-305TX SERVICE PROCEDURES-2
SERVICE PROCEDURES
1. Replacing the fuses
This symbol located near the fuse indicates that the fuse used is show operating type, For continued protection against fire hazard, replace with same type fuse , For fuse rating, refer to the marking adjest to the symbol. Ce symbole indique que le fusible utilise est e lent. Pour une protection permanente, n'utiliser que des fusibles de meme type. Ce demier est indique la qu le present symbol est apposre. REF.NO. F901 PART NO. 252157 252083 DESCRIPTION 1.25A-UL/T-237, Fuse <DD, DT> 0.4A-SE-EAW, FUSE <PP,GR, GT> NOTE : <DD, DT> : 120 V model only <PP,GR, GT> : 230 V model only
2. To initialize the unit
1. Press and hold the MEMORY button and press the DISPLAY button. All segments light up. 2. Press the STANDBY/ON button. When " CLEAR " appears on the display, the preset memory and each mode stored in the memory are initialized and will return to the factory setting.
3. Safety-check out
(Only U.S.A. model) After correcting the original service problem perform the follwing safety check before releasing the set to the customer Connect the insulating-resistance tester between the plug of power supply cord and terminal GND on the back panel. Specifications: More than 10Mohm at 500V
4. Memory Preservation
This unit does not require memory preservation batteries. A built-in memory power back-up system preserves the contents of the memory during power failures and even when the unit is un-plugged. The unit must be plugged in order to charge the back-up system. The memory preservation period after the unit has been unplugged varies depending on climate and placement of the unit. On the average, memory contents are protected over a period of a few weeks after the last time the unit has been unplugged. This period is shorter when the unit is exposed to a highly humid cli-mate.
5. Changing the AM band step
With the exception of the worldwide models, a tuning step selector switch is not provided. When you change the band step, change the parts as shown below. To 10kHz 3.3k 5.6k To 9kHz 10k open
R705 R706
